Low coefficient of friction laminate
阅读说明：本技术 低摩擦系数层压物 (Low coefficient of friction laminate ) 是由 C·洛普 O·昂加依 M·埃米希 P·普雷莱 C·谢瓦利尔 于 2018-06-04 设计创作，主要内容包括：本公开提供层压物。所述层压物包括第一膜和第二膜,其中所述第一膜层压到所述第二膜。所述第一膜包括含有以下的密封剂层：(A)基于乙烯的聚合物；和(B)增滑剂共混物,所述增滑剂共混物含有(i)数均分子量(Mn)为30,000g/mol至小于300,000g/mol的第一聚二甲基硅氧烷；和(ii)数均分子量(Mn)为300,000g/mol至2,000,000g/mol的第二聚二甲基硅氧烷。(The present disclosure provides a laminate. The laminate includes a first film and a second film, wherein the first film is laminated to the second film. The first film includes a sealant layer comprising: (A) an ethylene-based polymer; and (B) a slip agent blend comprising (i) a first polydimethylsiloxane having a number average molecular weight (Mn) of from 30,000g/mol to less than 300,000 g/mol; and (ii) a second polydimethylsiloxane having a number average molecular weight (Mn) of from 300,000g/mol to 2,000,000 g/mol.)
1. A laminate, comprising:
a first film comprising
A sealant layer comprising
(A) An ethylene-based polymer;
(B) a slip agent blend comprising
(i) A first Polydimethylsiloxane (PDMS) having a number average molecular weight (Mn) of 30,000 to less than 300,000 g/mol;
(ii) a second Polydimethylsiloxane (PDMS) having a number average molecular weight (Mn) of 300,000 to 2,000,000 g/mol; and
a second film, wherein the first film is laminated to the second film.
2. The laminate of claim 1 wherein the first PDMS has an Mn of 30,000 to less than 50,000g/mol and the second PDMS has an Mn of 300,000 to 550,000 g/mol.
3. The laminate of claim 1 or 2, wherein the slip agent blend comprises: based on the total weight of the slip agent blend
(i)1 wt% to less than 50 wt% of the first PDMS; and
(ii) greater than 50 to 99 wt% of the second PDMS.
4. The laminate of any one of claims 1 to 3, wherein the ethylene-based polymer is an ethylene/α -olefin copolymer.
5. The laminate of any one of claims 1 to 4, wherein the sealant layer comprises from 0.1 wt% to 5.0 wt% of the slip agent blend, by total weight of the sealant layer.
6. The laminate according to any one of claims 1 to 5, wherein the sealant layer comprises: based on the total weight of the sealant layer
(i)0.01 wt% to less than 2.5 wt% of the first PDMS; and
(ii) greater than 0.05 wt% to 4.95 wt% of the second PDMS.
7. The laminate according to any one of claims 1 to 6, wherein the ethylene-based polymer comprises an ethylene plastomer/elastomer and a Low Density Polyethylene (LDPE).
8. The laminate of any one of claims 1 to 7, wherein the second film is a monolayer film.
9. The laminate of any one of claims 1 to 8, wherein the second film comprises a layer comprising a component selected from the group consisting of: polyethylene terephthalate (PET), ethylene vinyl alcohol (EVOH) copolymers, polyamides, or combinations thereof.
10. The laminate of any one of claims 1 to 9, further comprising an adhesive layer in contact with the first film and the second film.
11. The laminate of claim 10, wherein the adhesive layer comprises an adhesive selected from the group consisting of: a polyether adhesive, a polyurethane adhesive, or a combination thereof.
12. The laminate of any one of claims 10 to 11, wherein the adhesive layer comprises a polyether-based polyurethane adhesive and the laminate has a COF of 0.20 to 0.55 at 12 meters per minute.
13. The laminate of any one of claims 10 to 11, wherein the adhesive layer comprises a polyester-based polyurethane adhesive and the laminate has a COF of 0.20 to 0.50 at 12 meters/minute.
14. The laminate of any one of claims 1 to 13, wherein the first film is a multilayer film comprising: a core layer in contact with the sealant layer; and a release layer in contact with the core layer.
15. The laminate of claim 14, comprising:
the first film comprising
The sealant layer, the sealant layer comprising
(A) An ethylene-based polymer;
(B) the slip agent blend comprises
(i)1 wt% to less than 50 wt% of the first PDMS;
(ii) from greater than 50 wt% to 99 wt% of the second PDMS;
a core layer in contact with the sealant layer, the core layer comprising a second ethylene-based polymer selected from the group consisting of: linear Low Density Polyethylene (LLDPE), Low Density Polyethylene (LDPE), and combinations thereof;
a release layer in contact with the core layer, the release layer comprising a third ethylene-based polymer selected from the group consisting of: linear Low Density Polyethylene (LLDPE), Low Density Polyethylene (LDPE), and combinations thereof;
the second film comprises a layer comprising polyethylene terephthalate (PET); and is
The outermost surface of the sealant layer is the outermost surface of the laminate, and the laminate has a coefficient of friction of less than 0.55 at 12 meters per minute.
Background
The present disclosure relates to laminates having films with a sealant layer containing an ethylene-based polymer and a slip agent.
Film layers formed from ethylene-based polymers are used in films in laminates in a variety of applications, including, for example, food packaging and specialty packaging. Outer laminate layers of ethylene-based polymers require a low coefficient of friction (COF) (e.g., less than 0.35) to effectively process the laminate, such as in a manufacturing line or packaging line. To achieve low COF, slip agents are typically added to the ethylene-based polymer outer layer. Conventional slip agents include unsaturated fatty acid amides, such as erucamide and oleamide, which are known to reduce the COF of the laminate by migrating to the surface of the laminate. However, it is difficult to maintain a consistently low COF using conventional migratory slip agents under different environmental conditions (e.g., time, high temperature, high pressure, and various conversion processes).
The art recognizes the need for a laminate having a film comprising an ethylene-based polymeric composition that can be used in a fast packaging line. The art also recognizes the need for laminates having films comprising ethylene-based polymeric compositions that exhibit a low COF (e.g., less than 0.35) in the absence of a migrating slip agent.
Disclosure of Invention
The present disclosure provides a laminate. The laminate includes a first film and a second film, wherein the first film is laminated to the second film. The first film includes a sealant layer comprising: (A) an ethylene-based polymer; and (B) a slip agent blend comprising (i) a first polydimethylsiloxane having a number average molecular weight (Mn) of from 30,000g/mol to less than 300,000 g/mol; and (ii) a second polydimethylsiloxane having a number average molecular weight (Mn) of from 300,000g/mol to 2,000,000 g/mol.
Definition of
Any reference to the periodic Table of elements is published by CRC Press, Inc., 1990-1991. Reference to a family of elements in this table is through the new notation used to number the family.
For purposes of united states patent practice, the contents of any referenced patent, patent application, or publication are incorporated by reference in their entirety (or the equivalent us version thereof is so incorporated by reference), especially with respect to the disclosure of definitions (to the extent not inconsistent with any definitions specifically provided in this disclosure) and general knowledge in the art.
The numerical ranges disclosed herein include all values from and including the upper and lower values. For ranges containing an exact value (e.g., 1 or 2, or 3 to 5, or 6, or 7), any subrange between any two exact values is included (e.g., 1 to 2; 2 to 6; 5 to 7; 3 to 7; 5 to 6; etc.).
Unless stated to the contrary, implied from the context, or customary in the art, all parts and percentages are by weight and all test methods are up to date the filing date of this disclosure.
The term "alkenyl" (or "alkenyl group") refers to an organic group derived from an aliphatic hydrocarbon by the removal of one hydrogen atom from an olefin group. A non-limiting example of an alkenyl group is vinyl. "vinyl" is-CH ═ CH2A group.
"alkoxy" (or "alkoxy group") means-OZ1Group, wherein Z is representative1Including alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, heterocycloalkyl, substituted heterocycloalkyl, silyl, and combinations thereof. Non-limiting examples of suitable alkoxy groups include methoxy, ethoxy, benzyloxy, and tert-butoxy.
The term "alkyl" (or "alkyl group") refers to an organic group derived from an aliphatic hydrocarbon by the removal of one hydrogen atom therefrom. The alkyl group can be linear, branched, cyclic, or a combination thereof. The term "substituted alkyl" refers to an alkyl group in which at least one hydrogen atom is substituted with a substituent comprising at least one heteroatom. Heteroatoms include, but are not limited to O, N, P and S. Substituents include but are not limited to halide, OR ', NR'2、PR'2、P(＝O)R'2、SIR'3(ii) a Each of whichR' is independently C1-C20A hydrocarbyl group.
The term "alkynyl" (or "alkynyl group") refers to an organic group derived from aliphatic hydrocarbons by the removal of one hydrogen atom from an alkynyl group.
The term "aryl" (or "aryl group") refers to an organic group derived from an aromatic hydrocarbon by the removal of one hydrogen atom therefrom. The aryl groups may be monocyclic and/or fused ring systems, wherein each ring suitably contains from 5 to 7, preferably 5 or 6 atoms. Also included are structures in which two or more aryl groups are combined through one or more single bonds. Specific examples include, but are not limited to, phenyl, tolyl, naphthyl, biphenyl, anthracenyl, indenyl, fluorenyl, benzofluorenyl, phenanthrenyl, terphenylene, pyrenyl, perylenyl, chrysenyl, condensed tetraphenyl, fluorenyl anthracenyl, and the like. The term "substituted aryl" refers to an aryl in which at least one hydrogen atom is substituted with a substituent comprising at least one heteroatom. Heteroatoms include, but are not limited to O, N, P and S. Substituents include but are not limited to halides OR ', NR'2、PR'2、P(＝O)R'2、SIR'3(ii) a Wherein each R' is independently C1-C20A hydrocarbyl group.
As used herein, the term "blend" or "polymer blend" is a blend of two or more polymers. Such blends may or may not be miscible (not phase separated at the molecular level). Such blends may or may not be phase separated. Such blends may or may not contain one or more domain configurations, as determined by transmission electron spectroscopy, light scattering, x-ray scattering, and other methods known in the art.
The term "composition" refers to a mixture of materials comprising the composition as well as reaction products and decomposition products formed from the materials of the composition.
The terms "comprising," "including," "having," and derivatives thereof, are not intended to exclude the presence of any additional component, step or procedure, whether or not the component, step or procedure is specifically disclosed. For the avoidance of any doubt, unless stated to the contrary, all compositions claimed through use of the term "comprising" may include any additional additive, adjuvant, or compound, whether polymeric or otherwise. In contrast, the term "consisting essentially of … …" excludes from any subsequently listed range any other components, steps or procedures other than those that are not essential to operability. The term "consisting of … …" excludes any component, step, or procedure not specifically recited or listed. Unless otherwise specified, the term "or" means the members listed individually and in any combination. The use of the singular includes the use of the plural and vice versa.
"cycloalkyl" is a saturated cyclic non-aromatic hydrocarbon group having a single ring or multiple condensed rings. Non-limiting examples of suitable cycloalkyl groups include cyclopentyl, cyclohexyl, cyclooctyl, bicyclooctyl, and the like. In particular embodiments, the cycloalkyl group has between 3 and 200 carbon atoms, between 3 and 50 carbon atoms, or between 3 and 20 carbon atoms.
Non-limiting examples of ethylene-based polymers (polyethylenes) include Low Density Polyethylene (LDPE) and linear polyethylene non-limiting examples of linear polyethylenes include Linear Low Density Polyethylene (LLDPE), ultra low density polyethylene (dpule), Very Low Density Polyethylene (VLDPE), multicomponent ethylene-based copolymer (EPE), ethylene/α -olefin multi-block copolymer (also known as Olefin Block Copolymer (OBC)), single site catalyzed linear low density polyethylene (m-LLDPE), substantially linear or linear plastomers/elastomers, and High Density Polyethylene (HDPE). generally, polyethylene can be produced using heterogeneous catalyst systems (such as ziegler-natta catalysts), heterogeneous transition metal group 4 and heterogeneous metal containing metallocene catalysts (ziegler-natta), heterogeneous metal-structured heterogeneous slurry reactor, heterogeneous liquid phase reaction, heterogeneous metal-supported slurry reactor, heterogeneous slurry reactor, or heterogeneous metal supported slurry reactor.
An "ethylene plastomer/elastomer" is a polymer comprising units derived from ethylene and units derived from at least one C containing a homogeneous short chain branching distribution3-C10α -olefin comonomer or at least one C4-C8α -olefin comonomer or at least one C6-C8α -units of an olefinic comonomer, or a substantially linear or linear ethylene/α -olefin copolymer the ethylene plastomer/elastomer has a density of 0.870g/cc, or 0.880g/cc, or 0.890g/cc to 0.900g/cc, or 0.902g/cc, or 0.904g/cc, or 0.909g/cc, or 0.910g/cc, or 0.917 g/cc. the non-limiting examples of ethylene plastomer/elastomer include AFFINITYTMPlastomers and elastomers (available from The Dow Chemical Company), EXACTTMPlastomers (available from ExxonMobil Chemical), TafmerTM(commercially available from Mitsui), NexleneTM(available from fresh Jing Chemicals Co., Ltd.) and LuceneTM(available from LEJIN Chemicals, Inc. (LG Chem Ltd.)).
"heteroatom" is an atom other than carbon or hydrogen. Non-limiting examples of suitable heteroatoms include: F. cl, Br, N, O, P, B, S, Si, Sb, Al, Sn, As, Se and Ge.
"high density polyethylene" (or "HDPE") is an ethylene homopolymer or a copolymer with at least one C4-C10α -olefin comonomer or C4-C8α -an ethylene/α -olefin copolymer of an olefin comonomer, and has a density greater than 0.94g/cc, or 0.945g/cc, or 0.95g/cc, or 0.955g/cc to 0.96g/cc, or 0.97g/cc, or 0.98 g/cc.HDPE can be a unimodal copolymer or a multimodal copolymer4-C10α -olefin copolymer A "multimodal ethylene copolymer" is a copolymer having at least two distinct peaks showing the molecular weight distribution in GPCethylene/C of4-C10α -olefin copolymer, multimodal includes copolymers having two peaks (bimodal) as well as copolymers having more than two peaksTMHigh Density Polyethylene (HDPE) resin (available from Dow chemical), ELITETMReinforced polyethylene resin (available from Dow chemical Co., Ltd.), CONTINUUMTMBimodal polyethylene resin (available from Dow chemical Co., Ltd.), LUPOLENTM(available from LyondellBasell) and HDPE products from northern Europe chemical (Borealis), Enlishi (Ineos) and ExxonMobil (ExxonMobil).
A "hydrocarbon" is a compound containing only hydrogen and carbon atoms. The hydrocarbon may be (i) branched or unbranched, (ii) saturated or unsaturated (iii) cyclic or acyclic, and (iv) any combination of (i) to (iii). Non-limiting examples of hydrocarbons include alkanes, alkenes, and alkynes.
The term "independently" or "each independently selected" or similar terms refer to a separate selection of elements for each individual member within the target group. For example, the term "for each of compound 1 to compound 5, independently, R1To R5Each independently selected from methyl, ethyl and propyl "indicates that (i) the substituents R are given for each compound 1-51-R5Are individually and individually (i.e., R of Compound 1)1(methyl) with R of Compound 2, 3, 4 or 51(methyl, ethyl or propyl) identical or different elements), and (ii) a para-substituent R1To R5Is separate for each individual substituent (i.e., relative to R)2、R3、R4And R5(methyl, ethyl or propyl), R1The (ethyl) groups may be the same or different elements).
An "interpolymer" is a polymer prepared by polymerizing at least two different monomers. This generic term includes copolymers (which are often used to refer to polymers prepared from two different monomers), and polymers prepared from more than two different monomers, e.g., terpolymers, tetrapolymers, etc.
' Low density polyethyleneThe olefin "(or" LDPE ") is composed of an ethylene homopolymer having a density of from 0.915g/cc to 0.940g/cc and containing long chain branches with broad MWD or comprises at least one C3-C10α -olefins, preferably C3-C4Typically ldpe by means of high pressure free radical polymerisation (tubular reactor or autoclave using free radical initiator)TM(Chevron Phillips), LUPOLENTM(Liandedsaier) and LDPE products from northern Europe, Enlishi, Exxon Mobil, and others.
"Linear Low Density polyethylene" (or "LLDPE") is a polyethylene containing heterogeneous short chain branching distribution comprising units derived from ethylene and derived from at least one C3-C10α -olefin comonomer or at least one C4-C8α -olefin comonomer, or at least one C6-C8α -a linear ethylene/α -olefin copolymer of units of an olefin comonomer LLDPE is characterized by little, if any, long chain branching compared to conventional LDPE the density of LLDPE is from 0.910g/cc, or 0.915g/cc, or 0.920g/cc, or 0.925g/cc to 0.930g/cc, or 0.935g/cc, or 0.940g/ccTMLinear low density polyethylene resin (available from Dow chemical Co.), DOWLEXTMPolyethylene resin (available from Dow chemical) and MARLEXTMPolyethylene (available from cheffoniphil).
"multicomponent ethylene-based copolymer" (or "EPE") comprising units derived from ethylene and units derived from at least one C3-C10α -olefin comonomer, or at least one C4-C8α -olefin comonomer, or at least one C6-C8α -units of an olefin comonomer, as described in U.S. Pat. No. 6,111,023, U.S. Pat. No. 5,677,383, and U.S. Pat. No. 6,984,695 the EPE resin has a density of 0.905g/cc, or 0.908g/cc, or 0.912g/cc, or 0.920g/cc to 0.926g/cc, or 0.929g/cc, or 0.940g/cc, or 0.962g/ccTMReinforced polyethylene (available from Dow chemical Co., Ltd.),ELITE ATTMAdvanced technology resins (available from the Dow chemical company), SURPASSTMPolyethylene (PE) resins (available from Norwalk chemical (Nova Chemicals)), and SMARTTM(available from fresh Jing chemical Co.).
An "olefin-based polymer" or "polyolefin" is a polymer containing greater than 50 weight percent polymerized olefin monomer (based on the total amount of polymerizable monomers) and optionally may contain at least one comonomer. A non-limiting example of an olefin-based polymer is an ethylene-based polymer.
The general term polymer thus embraces the term homopolymer, which is commonly used to refer to polymers prepared from only one type of monomer, and the term copolymer, which is commonly used to refer to polymers prepared from at least two types of monomers.
A "single-site catalyzed linear low density polyethylene" (or "m-LLDPE") is a polyethylene composition comprising units derived from ethylene and units derived from at least one C having a homogeneous short chain branching distribution3-C10α -olefin comonomer or at least one C4-C8α -olefin comonomer or at least one C6-C8α -units of an olefin comonomer Linear ethylene/α -olefin copolymer the density of m-LLDPE was 0.913g/cc, or 0.918g/cc, or 0.920g/cc to 0.925g/cc, or 0.940 g/cc. Non-limiting examples of m-LLDPE include EXCEEDTMMetallocene PE (available from Exxon Mobil chemical), LUFLEXENTMm-LLDPE (commercially available from RiandBarcel), and ELTEXTMPF m-LLDPE (commercially available from Enlishi Olefins and polymers (Ineos Olefins)&Polymers))。
"ultra-low density polyethylene" (or "ULDPE") and "very low density polyethylene" (or "VLDPE") are each units comprising units derived from ethylene and derived from at least one C containing a heterogeneous short chain branching distribution3-C10α -olefin comonomer or at least one C4-C8α -olefin comonomer or at least one C6-C8α -units of an olefin comonomer linear ethylene/α -olefin copolymers ULDPE and VLDPE each have a density of 0.885g/cc, or 0.90g/cc to 0.915g/ccTMUltra low density polyethylene resin (available from Dow chemical) and FLEXOMERTMVery low density polyethylene resins (available from the dow chemical company).
Test method
The coefficient of friction (COF) at 100 millimeters per minute (mm/min) was measured according to ISO8295 (dynamic COF). The substrate used was 304 stainless steel.
The coefficient of friction (COF) at 12 meters per minute (meters per minute) is measured using an "on-line" COF test device described in International publication No. WO 2011/019787, the entire contents of which are incorporated herein by reference, during the test, a roll of sample film or laminate is mounted on a slitter winder and threaded through the on-line COF test device and back to the slitter winder drive rollers the sample motion is controlled using a slitter winder control system, the wrap angle (β) on the surface of a 304 stainless steel static roller is 0.52 radians, during the test, the sealant layer of the sample film or laminate is in contact with the static roller surface, the dynamic COF is tested at a sample line speed of 12 meters per minute2＝T1eμβWherein T is1Tension of the sample before winding on the static roller, T2μ is the COF for the tension of the sample after winding on the static roll, and β is the wrap angle on the surface of the static roll.
Density is measured according to ASTM D792, method B. The results are reported in grams per cubic centimeter (g/cc).
Melt Index (MI) in grams/10 minutes was measured using ASTM D-1238-04(190 ℃/2.16kg) (I2).
Differential Scanning Calorimetry (DSC)
Differential Scanning Calorimetry (DSC) can be used to measure the melting, crystallization and glass transition behavior of polymers over a wide range of temperatures. This analysis is performed, for example, using a TA instrument (tasinstruments) Q1000 DSC equipped with a Refrigerated Cooling System (RCS) and an autosampler. During the test, a nitrogen purge gas flow of 50 ml/min was used. Melt pressing each sample at 190 ℃ into a film; the molten sample was then air cooled to room temperature (25 ℃). A 3-10mg, 6mm diameter sample was taken from the cooled polymer, weighed, placed in a lightweight aluminum pan (50mg), and crimped closed. And then analyzed to determine its thermal properties.
The thermal behavior of the sample is determined by ramping the temperature of the sample up and down to produce a heat flow versus temperature curve. First, the sample was rapidly heated to 180 ℃ and kept isothermal for 3 minutes in order to remove its thermal history. Next, the sample was cooled to-80 ℃ at a cooling rate of 10 degrees Celsius per minute and held isothermal for 3 minutes at-80 ℃. The sample was then heated to 180 ℃ (this is a "second heat" ramp) at a 10 degree celsius/minute heating rate. The cooling and second heating profiles were recorded. The values determined are the extrapolated onset of melting Tm and the extrapolated onset of crystallization Tc. Heat of fusion (Hf) (in joules/gram) the% crystallinity of the polyethylene samples was calculated using the following equation: % crystallinity ((Hf)/292J/g) × 100; and the% crystallinity of the polyethylene sample was calculated using the following equation: % crystallinity ((Hf)/292J/g) × 100. The heat of fusion (Hf) and peak melting temperature are reported from the second heating curve. The peak crystallization temperature was determined from the cooling curve.
The melting point Tm is determined from the DSC heating curve by first plotting a baseline between the beginning and end of the melting transition. The tangent is then plotted for the data on the low temperature side of the melting peak. The point where this tangent intersects the baseline is the extrapolated onset of crystallization (Tc). This is described in Bernhard Wunderlich, basis for Thermal Analysis in Thermal Characterization of polymeric materials (the basis of Thermal Analysis, in Thermal Characterization of polymeric materials) 92,277-278 (edited by Edith A. Turi, 2 nd edition 1997).
Gel Permeation Chromatography (GPC)
A high temperature Gel Permeation Chromatography (GPC) system equipped with a Robot Assisted Delivery (RAD) system was used for sample preparation and sample injection. The concentration detector was an infrared detector (IR-5) from Polymer Char corporation, Balncia, Spain. Data collection was performed using a Polymer Char DM 100 data acquisition box. The carrier solvent is 1,2, 4-Trichlorobenzene (TCB). The system was equipped with an online solvent degassing unit from Agilent. The column compartment was operated at 150 ℃. The columns were four Mixed ALS 30cm 20 micron columns. The solvent was 1,2, 4-Trichlorobenzene (TCB) purged with nitrogen containing about 200ppm of 2, 6-di-tert-butyl-4-methylphenol ("BHT"). The flow rate was 1.0 ml/min and the injection volume was 200. mu.l. Sample concentration of "2 mg/mL" was determined by subjecting the sample to N at 160 ℃ with gentle stirring2Purged and preheated TCB (containing 200ppm BHT) for 2.5 hours.
The GPC column set was calibrated by running twenty narrow molecular weight distribution polystyrene standards. The Molecular Weight (MW) of the standards ranged from 580g/mol to 8,400,000g/mol, and the standards were contained in six "cocktail" mixtures. There is at least a tenfold separation between the individual molecular weights in each standard mixture. Equivalent polypropylene molecular weights for each PS standard were determined by using the following equations, as well as the reported Mark-Houwink coefficients for polypropylenes (Th.G.Scholte, N.L.J.Meijerink, H.M.Schofelers and A.M.G.Brands, in journal of applied Polymer science (J.Appl.Polymer.Sci., 29,3763-3782(1984)) and polystyrenes (E.P.Otoka, R.J.roe, N.Y.Hellman and P.M.Muglia, Macromolecules (Macromolecules), 4,507(1971)), (Th.G.To calculate:wherein M isppIs PP equivalent MW, MPSFor PS equivalent MW, log K and a values for the mark-houwink coefficients of PP and PS are listed below.
Polymer and method of making same
a
log K
Polypropylene
0.725
-3.721
Polystyrene
0.702
-3.900
The log molecular weight calibration was generated using a fourth order polynomial fit as a function of elution volume. The number average molecular weight and the weight average molecular weight are calculated according to the following equations:
GPC-triple Detector (Mw and Mn measurement of PDMS)
Weight average molecular weight (Mw) and number average molecular weight (Mn) of polydimethylsiloxane Using triple detectability by GPC (Viscotek)TMGPC Max). ViscotekTMThe TDA305 apparatus was equipped with a differential refractometer, an online differential pressure viscometer, and low angle light scattering (LALS: detection angles of 7 ℃ and 90 ℃). The mobile phase was toluene HPLC grade. The columns were two PL Gel Mixed C- (7.5 x 300mm, 5 μm particle size) from warian (Varian) and PL Gel Guard column- (7.5 x 300mm)5 from warian with a flow rate of 1 ml/min and run time of 37 min. The column and detector temperature was 40 ℃. The software used was Omnisec 4.6.1 (Viscotek)TM)。
The detector was calibrated by injecting a narrow polystyrene standard (Mw 68,100g/mol) of known concentration. The correct operating parameters were checked by using a narrow molecular weight distribution polystyrene standard (PS 71K). The molecular weight average must be within a Statistical Process Control (SPC) chart in order to verify the calibration of the detector. Typical GPC3The precision and accuracy (which depends on the refractive index increment) is about 2-3%.
Detailed Description
The present disclosure provides a laminate. The laminate includes a first film and a second film, wherein the first film is laminated to the second film. The first film includes a sealant layer comprising: (A) an ethylene-based polymer; and (B) a slip agent blend comprising (i) a first polydimethylsiloxane having a number average molecular weight (Mn) of from 30,000g/mol to less than 300,000 g/mol; and (ii) a second polydimethylsiloxane having a number average molecular weight (Mn) of from 300,000g/mol to 2,000,000 g/mol.
First film
The laminate includes a first film. The first film includes a sealant layer.
The first film may be a monolayer film or a multilayer film. The first multilayer film contains two or more layers. For example, the first multilayer film can have two, three, four, five, six, seven, eight, nine, ten, eleven, or more layers. In embodiments, the first multilayer film contains only two layers or only three layers. In an embodiment, the first film is a multilayer film having a sealant layer, a core layer, and a release layer, wherein the core layer is in contact with the sealant layer and the release layer is in contact with the core layer.
1. Sealant layer
The first film includes a sealant layer. The sealant layer contains (A) an ethylene-based polymer; and (B) a slip agent blend comprising (i) a first polydimethylsiloxane having a number average molecular weight (Mn) of from 30,000g/mol to less than 300,000 g/mol; and (ii) a second polydimethylsiloxane having a number average molecular weight (Mn) of from 300,000g/mol to 2,000,000 g/mol; and optionally, (C) an additive.
The sealant layer has two opposing surfaces. In an embodiment, the sealant layer is a continuous layer having two opposing surfaces.
A. Ethylene-based polymers
Non-limiting examples of suitable ethylene-based polymers also include ethylene/α -olefin interpolymers and ethylene/α -olefin copolymers non-limiting examples of suitable α -olefins include C3-C20α -olefin, or C4-C20α -olefin, or C3-C10α -olefin, or C4-C10α -olefin, or C4-C8α -olefin representative α -olefins include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene.
In embodiments, the ethylene-based polymer contains greater than 50 wt% of units derived from ethylene, or 51 wt%, or 55 wt%, or 60 wt% to 70 wt%, or 80 wt%, or 90 wt%, or 95 wt%, or 99 wt%, or 100 wt% of units derived from ethylene, based on the weight of the ethylene-based polymer in embodiments, the ethylene-based polymer contains the reciprocal amount of units derived from α -olefin comonomer, or less than 50 wt%, or 49 wt%, or 45 wt%, or 40 wt% to 30 wt%, or 20 wt%, or 10 wt%, or 5 wt%, or 1 wt%, or 0 wt% of units derived from α -olefin comonomer, based on the weight of the ethylene-based polymer.
In an embodiment, the ethylene-based polymer is an ethylene plastomer/elastomer. The ethylene plastomer/elastomer is a blend of a blend derived from ethylene and C3-C10α -olefin comonomer, or C4-C8α -olefin comonomer, or C6-C8α -an ethylene/α -olefin copolymer of units of an olefin comonomer and optional additives in embodiments, the ethylene plastomer/elastomer is an ethylene/C having one, some or all of the following properties4-C8α -olefin copolymer:
(a) a density of 0.870g/cc, or 0.880g/cc, or 0.890g/cc to 0.900g/cc, or 0.902g/cc, or 0.904g/cc, or 0.909g/cc, or 0.910g/cc, or 0.917 g/cc; and/or
(b) A melt index of 0.1 g/10 min, or 1 g/10 min to 1.5 g/10 min, or 2.0 g/10 min, or 3.0 g/10 min, or 5.0 g/10 min, or 6.0 g/10 min, or 8.0 g/10 min, or 10 g/10 min, or 15 g/10 min, or 20 g/10 min, or 30 g/10 min, or 40 g/10 min, or 50 g/10 min, or 100 g/10 min, or 150 g/10 min, or 200 g/10 min, or 250 g/10 min, or 300 g/10 min; and/or
(c) A melting point (Tm) of 40 ℃, or 45 ℃, or 50 ℃, or 55 ℃, or 60 ℃, or 65 ℃, or 70 ℃, or 75 ℃ to 80 ℃, or 85 ℃, or 90 ℃, or 95 ℃, or 100 ℃, or 105 ℃, or 110 ℃, or 115 ℃, or 120 ℃.
In the examples, the ethylene plastomer/elastomer is an ethylene/1-octene copolymer having a density of 0.902g/cc, a melt index of 1.0 g/10 minutes, and a melting point of 99 ℃ (e.g., AFFINITY available from Dow chemical Co., Ltd.)TMPL1880G)
In an embodiment, the ethylene-based polymer is a Low Density Polyethylene (LDPE). The LDPE being an ethylene homopolymer or derived from ethylene and C3-C10α -olefin comonomer, or C4-C8α -olefin comonomer, or C6-C8α -an ethylene/α -olefin copolymer comprised of units of an olefin comonomer LDPE has one or both of (a) a density of 0.915g/cc, or 0.920g/cc, or 0.925g/cc to 0.930g/cc, or 0.935g/cc, or 0.940g/cc, and/or (b) a melt index of 0.1 g/10 min, or 1 g/10 min, or 1.5 g/10 min, or 2.0 g/10 min to 3.0 g/10 min, or 5.0 g/10 min, or 6.0 g/10 min, or 8.0 g/10 min, or 10 g/10 min, or 15 g/10 min, or 20 g/10 min, or 30 g/10 min, or 40 g/10 min, or 50 g/10 min, or 100 g/10 min.
The sealant layer may contain more than one ethylene-based polymer. In an embodiment, the sealant layer includes at least two ethylene-based polymers, wherein each ethylene-based polymer is different from each other in composition, structure, and/or physical. In an embodiment, the sealant layer contains ethylene plastomer/elastomer and LDPE. In another embodiment, the sealant layer contains an ethylene plastomer/elastomer and LLDPE.
In embodiments, the sealant layer contains 70 wt%, or 75 wt%, or 80 wt%, or 85 wt%, or 90 wt% to 93 wt%, or 94 wt%, or 95 wt%, or 96 wt%, or 97 wt%, or 98 wt%, or 99 wt%, or 99.9 wt% of the ethylene-based polymer, based on the total weight of the sealant layer.
The ethylene-based polymer may comprise two or more embodiments discussed herein.
B. Slip agent blends
The sealant layer contains a slip agent blend. The slip agent blend contains, based on the total weight of the slip agent blend, (i) a first polydimethylsiloxane having a number average molecular weight (Mn) of from 30,000g/mol to less than 300,000 g/mol; and (ii) a second polydimethylsiloxane having a number average molecular weight (Mn) of from 300,000g/mol to 2,000,000 g/mol.
"polydimethylsiloxane" ("PDMS") is a polymeric organosilicon compound having the following general structure (I):
wherein n is a repeating monomer [ SiO (CH)3)2]The number of units, and n is greater than or equal to 2, or from 2 to 20,000. PDMS may be unsubstituted or substituted. "substituted PDMS" is PDMS in which at least one methyl group of structure (I) is substituted with a substituent. Non-limiting examples of substituents include halogen atoms (such as chlorine, fluorine, bromine, and iodine); and halogen atom-containing groups (such as chloromethyl, perfluorobutyl, trifluoroethyl, and nonafluorohexyl); oxygen atom-containing groups (e.g., hydroxyl groups, alkoxy groups (e.g., methoxy and ethoxy groups), (meth) acrylic epoxy groups, and carboxyl groups); nitrogen atom-containing groups (e.g., amino functional groups, amido functional groups, and cyano functional groups); a sulfur atom-containing group (e.g., a mercapto group); hydrogen; c2-C10Alkyl groups (such as ethyl); c2-C10An alkynyl group; alkenyl groups (such as vinyl and hexenyl); aryl groups (such as phenyl and substituted phenyl); cycloalkyl (e.g., cyclohexane); and combinations thereof. The substituted methyl group may be a terminal methyl group or a non-terminal methyl group. Non-limiting examples of suitable substituted PDMS include trialkylsilyl-terminated PDMS, wherein at least one alkyl group is C2-C10An alkyl group; dialkyl hydroxysilyl terminated PDMS; dialkylhydrosilyl-terminated PDMS; dialkylalkenylsilyl terminated PDMS; and dialkylvinylsilyl-terminated PDMS. In an embodiment, the substituted PDMS is a dimethylhydroxysilyl terminated PDMS. In another embodiment, the substituted PDMS is a dimethylvinylsilyl-terminated PDMS.
In embodiments, the substituted PDMS does not include groups containing nitrogen atoms. In another embodiment, the substituted PDMS does not include epoxy substituents.
In embodiments, PDMS is unsubstituted. "unsubstituted PDMS" is a PDMS of structure (I) wherein the methyl groups in structure (I) are not substituted with substituents. In an embodiment, the unsubstituted PDMS is a trimethylsilyl-terminated PDMS.
(i) First polydimethylsiloxane
The slip agent blend contains a first polydimethylsiloxane ("low Mn" PDMS) having a number average molecular weight (Mn) of from 30,000g/mol to less than 300,000 g/mol.
In embodiments, the number average molecular weight (Mn) of the first PDMS (i.e., the low Mn PDMS) is 30,000g/mol, or 40,000g/mol, or 45,000g/mol, or 48,000 to 49,000g/mol, or 50,000g/mol, or 55,000g/mol, or 60,000g/mol, or 65,000g/mol, or 70,000g/mol, or 75,000g/mol, or 80,000g/mol, or 90,000g/mol, or 100,000g/mol, or 150,000g/mol, or 200,000g/mol, or 250,000g/mol, or 290,000g/mol, or less than 300,000 g/mol. In embodiments, the number average molecular weight (Mn) of the low Mn PDMS is 30,000g/mol, or 35,000g/mol, or 40,000g/mol, or 45,000g/mol, or 48,000g/mol to 49,000g/mol, or less than 50,000 g/mol.
In embodiments, the low Mn PDMS has a weight average molecular weight (Mw) of 30,000g/mol, or 40,000g/mol, or 45,000g/mol, or 50,000g/mol, or 55,000g/mol, or 60,000g/mol, or 65,000g/mol, or 70,000g/mol, or 75,000g/mol, or 80,000g/mol, or 90,000g/mol, or 100,000g/mol, or 120,000g/mol to 130,000g/mol, or 140,000g/mol, or 150,000g/mol, or 200,000g/mol, or 250,000g/mol, or 290,000g/mol, or less than 300,000 g/mol.
In embodiments, the low Mn PDMS has a molecular weight distribution (Mw/Mn) of 1.0, or 1.5, or 2.0, or 2.1, or 2.2, or 2.3, or 2.4 to 2.5, or 2.6, or 2.7, or 2.8, or 2.9, or 3.0, or 3.5.
In an embodiment, the low Mn PDMS has a structure (I) and n is 2, or 5, or 10, or 50, or 100, or 150, or 200, or 250, or 300, or 350, or 400, or 450, or 500, or 550, or 600, or 650 to 700, or 750, or 800, or 850, or 900, or 950, or 1000, or 1100, or 1200, or 1300, or 1400, or 1500, or 1600, or 1700, or 1800, or 1900, or 2000, or 2500, or 3000, or 3500, or 4000, or 4054.
In an embodiment, the low Mn PDMS is a dimethylhydroxysilyl terminated PDMS.
In embodiments, the number average molecular weight (Mn) of the low Mn PDMS (e.g., a dimethylhydroxysilyl terminated PDMS) is 30,000g/mol, or 35,000g/mol, or 40,000g/mol, or 45,000g/mol, or 48,000g/mol, to 49,000g/mol, or 50,000 g/mol; and the low Mn PDMS has one, some or all of the following properties:
(a) a weight average molecular weight (Mw) of 50,000g/mol, or 55,000g/mol, or 60,000g/mol, or 65,000g/mol, or 70,000g/mol, or 75,000g/mol, or 80,000g/mol, or 90,000g/mol, or 100,000g/mol, or 120,000g/mol to 130,000g/mol, or 150,000 g/mol; and/or
(b) A molecular weight distribution (Mw/Mn) of 2.2, or 2.3, or 2.4 to 2.5, or 2.6; and/or
(c) The low Mn PDMS has a structure (I) and n is 2, or 5, or 10, or 50, or 100, or 150, or 200, or 250, or 300, or 350, or 400, or 450, or 500, or 550, or 600, or 650 to 700, or 750, or 800, or 850, or 900, or 950, or 1000, or 1100, or 1200, or 1300, or 1400, or 1500, or 1600, or 1700, or 1800, or 1900, or 2000, or 2500, or 3000, or 3500, or 4000, or 4054.
The slip agent blend may contain more than one low Mn PDMS.
The first PDMS (i.e., low Mn PDMS) may include two or more embodiments discussed herein.
(ii) Second polydimethylsiloxane
The slip agent blend contains a second polydimethylsiloxane ("high Mn" PDMS) having a number average molecular weight (Mn) of 300,000 to 2,000,000 g/mol.
In embodiments, the number average molecular weight (Mn) of the second PDMS (i.e., a high Mn PDMS) is 300,000g/mol, or 310,000g/mol, or 320,000g/mol, or 330,000g/mol, or 340,000g/mol, or 350,000g/mol to 360,000g/mol, or 370,000g/mol, or 380,000g/mol, or 390,000g/mol, or 400,000g/mol, or 450,000g/mol, or 500,000g/mol, or 550,000g/mol, or 600,000g/mol, or 750,000g/mol, or 1,000,000g/mol, or 1,500,000g/mol, or 2,000,000 g/mol. In embodiments, the number average molecular weight (Mn) of the high Mn PDMS is 300,000g/mol, or 310,000g/mol, or 320,000g/mol, or 330,000g/mol, or 340,000g/mol, or 350,000g/mol to 360,000g/mol, or 370,000g/mol, or 380,000g/mol, or 390,000g/mol, or 400,000g/mol, or 450,000g/mol, or 500,000g/mol, or 550,000 g/mol.
In embodiments, the high Mn PDMS has a weight average molecular weight (Mw) of 350,000g/mol, or 360,000g/mol, or 370,000g/mol, or 380,000g/mol, or 390,000g/mol, or 400,000g/mol, or 450,000g/mol, or 500,000g/mol, or 600,000g/mol, or 640,000g/mol to 650,000g/mol, or 700,000g/mol, or 750,000g/mol, or 800,000g/mol, or 900,000g/mol, or 1,000,000g/mol, or 1,500,000g/mol, or 2,000,000 g/mol.
In embodiments, the molecular weight distribution (Mw/Mn) of the high Mn PDMS is 1.0, or 1.5, or 1.8 to 1.9, or 2.0, or 2.1, or 2.2, or 2.3, or 2.4, or 2.5, or 2.6, or 2.7, or 2.8, or 2.9, or 3.0.
In an embodiment, the high Mn PDMS has structure (I) and n is greater than 4054, or 4500 to 5000, or 5500, or 6000, or 6500, or 7000, or 7500, or 8000, or 8500, or 9000, or 9500, or 10000, or 11000, or 12000, or 13000, or 14000, or 15000, or 16000, or 17000, or 18000, or 19000, or 20000, or 21000, or 22000, or 23000, or 24000, or 25000, or 26000, or 27000, or 27027.
In an embodiment, the high Mn PDMS is a dimethylvinylsilyl-terminated PDMS.
In embodiments, the number average molecular weight (Mn) of the high Mn PDMS (e.g., a dimethylvinylsilyl-terminated PDMS) is 300,000g/mol, or 310,000g/mol, or 320,000g/mol, or 330,000g/mol, or 340,000g/mol, or 350,000g/mol to 360,000g/mol, or 370,000g/mol, or 380,000g/mol, or 390,000g/mol, or 400,000g/mol, or 450,000g/mol, or 500,000g/mol, or 550,000 g/mol; and the high Mn PDMS has one, some or all of the following properties:
(a) a weight average molecular weight (Mw) of 400,000g/mol, or 450,000g/mol, or 500,000g/mol, or 600,000g/mol, or 640,000g/mol to 650,000g/mol, or 700,000g/mol, or 750,000g/mol, or 800,000g/mol, or 900,000g/mol, or 1,000,000 g/mol; and/or
(b) A molecular weight distribution (Mw/Mn) of 1.5, or 1.8 to 1.9, or 2.0, or 2.1; and/or
(c) The high Mn PDMS has structure (I) and n is greater than 4054, or 4500 to 5000, or 5500, or 6000, or 6500, or 7000, or 7500, or 8000, or 8500, or 9000, or 9500, or 10000, or 11000, or 12000, or 13000, or 14000, or 15000, or 16000, or 17000, or 18000, or 19000, or 20000, or 21000, or 22000, or 23000, or 24000, or 25000, or 26000, or 27000, or 27027.
The slip agent blend may contain more than one high Mn PDMS.
The second PDMS (i.e., a high Mn PDMS) may include two or more embodiments discussed herein.
In embodiments, the sealant layer contains 0.1 wt%, or 0.2 wt%, or 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 1.5 wt%, or 1.8 wt% to 2.0 wt%, or 2.3 wt%, or 2.5 wt%, or 2.8 wt%, or 3.0 wt%, or 3.5 wt%, or 4.0 wt%, or 4.5 wt%, or 5.0 wt% of the slip agent blend based on the total weight of the sealant layer. In another embodiment, the sealant layer contains 0.5 wt%, or 1.0 wt% to 1.5 wt%, or 2.0 wt%, or 2.5 wt% of the slip agent blend, based on the total weight of the sealant layer. In another embodiment, the sealant layer contains 0.5 wt%, or 0.8 wt% to 1.0 wt%, or 1.5 wt%, or 2.0 wt%, or 2.5 wt% of the slip agent blend, based on the total weight of the sealant layer. The first PDMS (i.e., low Mn PDMS) and the second PDMS (i.e., high Mn PDMS) may be included in the sealant layer as part of a masterbatch in which one or both of the PDMS components are dispersed in a polymer matrix, such as an LDPE matrix. However, the amount of slip agent blend included in the sealant layer refers only to the amount of first PDMS (i.e., low Mn PDMS) and second PDMS (i.e., high Mn PDMS) included in the sealant layer, and does not include the weight of the polymer matrix of any PDMS masterbatch. In other words, the amount of slip agent blend refers to the combined amount of first PDMS and second PDMS included in the sealant layer.
In an embodiment, the slip agent blend contains from 1 wt% to 99 wt% of the first PDMS (i.e., a low Mn PDMS) and an inverse amount, or from 1 wt% to 99 wt% of the second PDMS (i.e., a high Mn PDMS), based on the total weight of the slip agent blend (i.e., based on the combined amount of the first PDMS and the second PDMS). In another embodiment, the slip agent blend contains from 1 wt% to less than 50 wt% of the first PDMS and from greater than 50 wt% to 99 wt% of the second PDMS, based on the total weight of the slip agent blend. In embodiments, the slip agent blend contains 1 wt%, or 2 wt%, or 5 wt%, or 10 wt%, or 15 wt%, or 20 wt% to 25 wt%, or 30 wt%, or 35 wt%, or 40 wt%, or 45 wt%, or 49 wt%, or less than 50 wt% of the first PDMS, and the inverse amount of the second PDMS, or greater than 50 wt%, or 51 wt%, or 55 wt%, or 60 wt%, or 65 wt%, or 70 wt%, or 75 wt% to 80 wt%, or 85 wt%, or 90 wt%, or 95 wt%, or 98 wt%, or 99 wt% of the second PDMS, based on the total weight of the slip agent blend. The combined amount of the first PDMS and the second PDMS yielded 100 wt% of the slip agent blend.
In embodiments, the sealant layer contains 0.01 wt%, or 0.05 wt%, or 0.10 wt%, or 0.20 wt%, or 0.30 wt%, or 0.40 wt%, or 0.50 wt% to 0.60 wt%, or 0.70 wt%, or 0.80 wt%, or 0.90 wt%, or 1.00 wt%, or 1.50 wt%, or 2.00 wt%, or 2.30 wt%, or 2.40 wt%, or less than 2.50 wt% of the first PDMS (i.e., a low Mn PDMS), based on the total weight of the sealant layer.
In embodiments, the sealant layer contains greater than 0.05 wt%, or 0.08 wt%, or 0.10 wt%, or 0.20 wt%, or 0.30 wt%, or 0.40 wt%, or 0.50 wt%, or 0.80 wt%, or 1.00 wt%, or 1.10 wt%, or 1.20 wt%, or 1.30 wt%, or 1.40 wt%, or 1.50 wt% to 1.60 wt%, or 1.70 wt%, or 1.80 wt%, or 1.90 wt%, or 2.00 wt%, or 2.50 wt%, or 3.00 wt%, or 3.50 wt%, or 4.00 wt%, or 4.50 wt%, or 4.95 wt% of the second PDMS (i.e., a high Mn PDMS), based on the total weight of the sealant layer.
In embodiments, the weight ratio of the second PDMS (i.e., the high Mn PDMS) to the first PDMS (i.e., the low Mn PDMS) is 1.1:1, or 1.5:1, or 2.0:1, or 3.0:1 to 4.0:1, or 5.0:1, or 10:1, or 15:1, or 20:1, or 25:1, or 30:1, or 40:1, or 50:1, or 60:1, or 70:1, or 80:1, or 90:1, or 99: 1. In an embodiment, the weight ratio of the second PDMS to the first PDMS is 3: 1.
The slip agent blend may include two or more embodiments discussed herein.
C. Optionally one or more additives
In embodiments, the sealant layer includes one or more optional additives. Non-limiting examples of suitable additives include antiblocking agents, antioxidants, antistatic agents, stabilizers, nucleating agents, colorants, pigments, Ultraviolet (UV) absorbers or stabilizers, flame retardants, compatibilizers, plasticizers, fillers, processing aids, anti-fog additives, crosslinking agents (e.g., peroxides), and combinations thereof.
In an embodiment, the sealant layer includes an antiblock agent. An "antiblocking agent" is a compound that minimizes or prevents blocking (i.e., adhesion) between two adjacent layers of a film by creating a microscopic roughening of the surface of the film layer, which reduces the available contact area between the adjacent layers. Antiblocking agents can be organic or inorganic. Non-limiting examples of suitable antiblocking agents include silica, talc, calcium carbonate, and combinations thereof. In the examples, the antiblocking agent is Silica (SiO)2). The silica may be an organic silica or a synthetic silica. In another embodiment, the antiblocking agent is talc.
In embodiments, the sealant layer contains 0 wt%, or 0.01 wt%, or 0.05 wt%, or 0.1 wt%, or 0.2 wt% to 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 2.0 wt%, or 3.0 wt%, or 4.0 wt%, or 5.0 wt% of the additive, based on the total weight of the sealant layer.
In embodiments, the sealant layer contains, consists essentially of, or consists of:
(A) 70 wt%, or 75 wt%, or 80 wt%, or 85 wt%, or 90 wt% to 93 wt%, or 94 wt%, or 95 wt%, or 96 wt%, or 97 wt%, or 98 wt%, or 99 wt%, or 99.9 wt% of an ethylene-based polymer (such as an ethylene plastomer/elastomer, LDPE, LLDPE, or a combination thereof) based on the total weight of the sealant layer;
(B)0.1 wt%, or 0.2 wt%, or 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 1.5 wt%, or 1.8 wt% to 2.0 wt%, or 2.3 wt%, or 2.5 wt%, or 2.8 wt%, or 3.0 wt%, or 3.5 wt%, or 4.0 wt%, or 4.5 wt%, or 5.0 wt% of the slip agent blend, based on the total weight of the sealant layer; and
(C) optionally, 0 wt%, or 0.01 wt%, or 0.05 wt%, or 0.1 wt%, or 0.2 wt% to 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 2.0 wt%, or 3.0 wt%, or 4.0 wt%, or 5.0 wt% of an additive, based on the total weight of the sealant layer; and
the slip agent blend contains:
(i)1 wt%, 5 wt%, or 10 wt%, or 15 wt%, or 20 wt% to 25 wt%, or 30 wt%, or 35 wt%, or 40 wt%, or 45 wt%, or 49 wt% or less than 50 wt% of a first PDMS (e.g., a dimethylhydroxysilyl terminated PDMS) having an Mn of 30,000g/mol, or 40,000g/mol, or 45,000g/mol, or 48,000g/mol to 49,000g/mol, or 50,000g/mol, or 55,000g/mol, or 60,000g/mol, or 65,000g/mol, or 70,000g/mol, or 75,000g/mol, or 80,000g/mol, or 90,000g/mol, or 100,000g/mol, or 150,000g/mol, or 200,000g/mol, or 250,000g/mol, based on the total weight of the slip agent blend; and
(ii) greater than 50 wt%, or 51 wt%, or 55 wt%, or 60 wt%, or 65 wt%, or 70 wt%, or 75 wt% to 80 wt%, or 85 wt%, or 90 wt%, or 95 wt%, or 99 wt% of a second PDMS (e.g., a dimethylvinylsilyl terminated PDMS) having an Mn of 300,000g/mol, or 310,000g/mol, or 320,000g/mol, or 330,000g/mol, or 340,000g/mol, or 350,000g/mol to 360,000g/mol, or 370,000g/mol, or 380,000g/mol, or 390,000g/mol, or 400,000g/mol, or 450,000g/mol, or 500,000g/mol, or 550,000g/mol, or 600,000g/mol, or 750,000g/mol, or 1,000,000g/mol, based on the total weight of the slip agent blend.
In embodiments, the sealant layer contains, consists essentially of, or consists of:
(1) 70 wt%, or 75 wt%, or 80 wt%, or 85 wt%, or 90 wt% to 93 wt%, or 94 wt%, or 95 wt%, or 96 wt%, or 97 wt%, or 98 wt%, or 99 wt%, or 99.9 wt% of an ethylene-based polymer (such as an ethylene plastomer/elastomer, LDPE, LLDPE, or a combination thereof) based on the total weight of the sealant layer;
(2) 0.01 wt%, or 0.05 wt%, or 0.10 wt%, or 0.20 wt%, or 0.30 wt%, or 0.40 wt%, or 0.50 wt% to 0.60 wt%, or 0.70 wt%, or 0.80 wt%, or 0.90 wt%, or 1.00 wt%, or 1.50 wt%, or 2.00 wt%, or 2.30 wt%, or 2.40 wt%, or less than 2.50 wt% of a PDMS having an Mn of 30,000g/mol, or 40,000g/mol, or 45,000g/mol, or 48,000g/mol to 49,000g/mol, or 50,000g/mol, or 55,000g/mol, or 60,000g/mol, or 65,000g/mol, or 70,000g/mol, or 75,000g/mol, or 80,000g/mol, or 90,000g/mol, or 100,000g/mol, or 150,000g/mol, or a PDMS capping group (e.g/mol) based on the total weight of the sealant layer;
(3) greater than 0.05 wt%, or 0.08 wt%, or 0.10 wt%, or 0.20 wt%, or 0.30 wt%, or 0.40 wt%, or 0.50 wt%, or 0.80 wt%, or 1.00 wt%, or 1.10 wt%, or 1.20 wt%, or 1.30 wt%, or 1.40 wt%, or 1.50 wt% to 1.60 wt%, or 1.70 wt%, or 1.80 wt%, or 1.90 wt%, or 2.00 wt%, or 2.50 wt%, or 3.00 wt%, or 3.50 wt%, or 4.00 wt%, or 4.50 wt%, or 4.95 wt% of Mn 300,000g/mol, or 310,000g/mol, or 320,000g/mol, or 330,000g/mol, or 340,000g/mol, or 350,000g/mol to 360,000g/mol, or 370,000g/mol, or 380,000g/mol, or 500,000g/mol, or 550 g/mol, or 500,000g/mol, or 550, Or 750,000g/mol, or 1,000,000g/mol of a second PDMS (e.g., a dimethylvinylsilyl-terminated PDMS); and
(4) optionally, 0 wt%, or 0.01 wt%, or 0.05 wt%, or 0.1 wt%, or 0.2 wt% to 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 2.0 wt%, or 3.0 wt%, or 4.0 wt%, or 5.0 wt% of an additive, based on the total weight of the sealant layer; and
the weight ratio of the first PDMS to the second PDMS is 1.5:1, or 2.0:1, or 3.0:1 to 4.0:1, or 5.0:1, or 10:1, or 15:1, or 20:1, or 25:1, or 30:1, or 40:1, or 50:1, or 60:1, or 70:1, or 80:1, or 90:1, or 99: 1.
In embodiments, the sealant layer does not include migrating slip agents such as unsaturated fatty acid amides (e.g., erucamide and oleamide).
In embodiments, the sealant layer has a COF at 100 mm/min of 0.01, or 0.05, or 0.10, or 0.20, or 0.25 to 0.27, or 0.28, or 0.29, or 0.30, or 0.35, or 0.39, or 0.40.
In embodiments, the sealant layer has a COF of 0.01, or 0.05, or 0.10, or 0.20, or 0.25 to 0.27, or 0.28, or 0.29, or 0.30, or 0.35, or 0.39, or 0.40 at 12 meters/minute.
In embodiments, the thickness of the sealant layer is 5 μm, or 7 μm, or 10 μm to 15 μm, or 20 μm, or 25 μm, or 30 μm, or 35 μm, or 40 μm, or 45 μm, or 50 μm.
In embodiments, the sealant layer is 10 vol%, or 15 vol%, or 20 vol% to 25 vol%, or 30 vol%, or 40 vol%, or 50 vol%, or 60 vol%, or 70 vol%, or 80 vol%, or 90 vol%, or 95 vol% of the first film, based on the total volume of the first film.
In an embodiment, the sealant layer is a skin layer. The "skin layer" is the outermost layer of the film structure. In other words, at least one surface of the skin layer is the outermost surface of the film.
The sealant layer may include two or more embodiments discussed herein.
2. Optional core layer
In an embodiment, the first film comprises a core layer. The core layer contains a second ethylene-based polymer. The "core layer" is a layer of the film structure as an inner layer. In other words, neither surface of the core layer is an outer surface of the first film.
The core layer has two opposing surfaces. In an embodiment, the core layer is a continuous layer having two opposing surfaces.
The core layer is in contact with the sealant layer. The core layer may be in direct contact or indirect contact with the sealant layer. In embodiments, the core layer is in direct contact with the sealant layer. As used herein, the term "direct contact" is a layer configuration in which the sealant layer is positioned immediately adjacent to the core layer and there is no intervening layer or no intervening structure between the sealant layer and the core layer. In another embodiment, the core layer is in indirect contact with the sealant layer. As used herein, the term "indirect contact" is a layer configuration in which an intermediate layer or structure is present between the sealant layer and the core layer.
The second ethylene-based polymer can be any ethylene-based polymer disclosed herein. The second ethylene-based polymer may be the same or different from the ethylene-based polymer of the sealant layer. In an embodiment, the second ethylene-based polymer is the same as the ethylene-based polymer of the sealant layer. In another embodiment, the second ethylene-based polymer is different from the ethylene-based polymer of the sealant layer.
In an embodiment, the second ethylene-based polymer is LLDPE, LDPE, or a combination thereof. In further embodiments, the LLDPE is an ethylene/1-octene copolymer.
In embodiments, the second layer contains 1 wt%, or 5 wt%, or 10 wt%, or 20 wt%, or 30 wt%, or 40 wt%, or 50 wt% to 60 wt%, or 70 wt%, or 80 wt%, or 90 wt%, or 95 wt%, or 99 wt% LLDPE, based on the total weight of the core layer; and an inverted amount of LDPE, or 1 wt%, or 5 wt%, or 10 wt%, or 20 wt%, or 30 wt%, or 40 wt%, or 50 wt% to 60 wt%, or 70 wt%, or 80 wt%, or 90 wt%, or 95 wt%, or 99 wt% LDPE.
In embodiments, the core layer contains optional additives. The additive can be any additive disclosed herein. In embodiments, the core layer contains 0 wt%, or 0.01 wt%, or 0.05 wt%, or 0.1 wt%, or 0.2 wt% to 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 2.0 wt%, or 3.0 wt%, or 4.0 wt%, or 5.0 wt% of an additive (e.g., a slip agent, an antiblock agent, or a combination thereof) based on the total weight of the core layer.
In embodiments, the core layer has a thickness of 5 μm, or 8 μm, or 10 μm, or 15 μm, or 20 μm, or 25 μm, or 30 μm to 35 μm, or 40 μm, or 45 μm, or 50 μm, or 55 μm, or 60 μm, or 65 μm, or 70 μm, or 75 μm, or 80 μm.
In embodiments, the core layer is 10 vol%, or 15 vol%, or 20 vol%, or 25 vol%, or 30 vol%, or 40 vol%, or 50 vol%, or 60 vol% to 65 vol%, or 70 vol%, or 80 vol%, or 90 vol% of the first film, based on the total volume of the first film.
The core layer may comprise two or more embodiments discussed herein.
3. Optional release layer
In an embodiment, the first film comprises a release layer. The release layer contains a third ethylene-based polymer.
The release layer has two opposing surfaces. In an embodiment, the release layer is a continuous layer having two opposing surfaces. The release layer is in contact with the core layer. The release layer may be in direct contact or indirect contact with the core layer. In an embodiment, the release layer directly contacts the core layer. In another embodiment, the release layer indirectly contacts the core layer.
The third ethylene-based polymer can be any ethylene-based polymer disclosed herein. The third ethylene-based polymer may be the same as or different from the ethylene-based polymer of the sealant layer, and the third ethylene-based polymer may be the same as or different from the second ethylene-based polymer of the core layer. In an embodiment, the third ethylene-based polymer is the same as the second ethylene-based polymer of the core layer. In another embodiment, the third ethylene-based polymer is different from the second ethylene-based polymer of the core layer.
In an embodiment, the third ethylene-based polymer is LLDPE, LDPE, or a combination thereof. In further embodiments, the LLDPE is an ethylene/1-octene copolymer. In embodiments, the release layer contains 5 wt%, or 10 wt%, or 20 wt%, or 30 wt%, or 40 wt%, or 50 wt% to 60 wt%, or 70 wt%, or 80 wt%, or 90 wt%, or 95 wt%, or 99 wt% LLDPE, based on the total weight of the release layer; and an inverted amount of LDPE, or 1 wt%, or 5 wt%, or 10 wt%, or 20 wt%, or 30 wt%, or 40 wt%, or 50 wt% to 60 wt%, or 70 wt%, or 80 wt%, or 90 wt%, or 95 wt% LDPE.
In embodiments, the release layer contains optional additives. The additive can be any additive disclosed herein. In embodiments, the release layer contains 0 wt%, or 0.01 wt%, or 0.05 wt%, or 0.1 wt%, or 0.2 wt% to 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 2.0 wt%, or 3.0 wt%, or 4.0 wt%, or 5.0 wt% of the additive, based on the total weight of the release layer.
In embodiments, the release layer has a thickness of 5 μm, or 7 μm, or 10 μm to 15 μm, or 20 μm, or 25 μm, or 30 μm, or 35 μm, or 40 μm, or 45 μm, or 50 μm.
In embodiments, the release layer comprises 10 vol%, or 15 vol%, or 20 vol% to 25 vol%, or 30 vol%, or 40 vol%, or 50 vol%, or 60 vol%, or 70 vol%, or 80 vol%, or 90 vol%, or 95 vol% of the film, based on the total volume of the first film.
In embodiments, the release layer is a skin layer.
In an embodiment, the release layer is corona treated.
The release layer may include two or more embodiments discussed herein.
In an embodiment, the first film is a multilayer film having the following structure (II):
sealant layer/core layer/release layer structure (ii).
In embodiments, the first film is a multilayer film consisting essentially of or consisting of: sealant layer, core layer and release layer.
In an embodiment, the thickness of the first film is 15 μm, or 20 μm, or 25 μm, or 30 μm, or 35 μm, or 40 μm, or 45 μm, or 50 μm to 55 μm, or 60 μm, or 65 μm, or 70 μm, or 75 μm, or 80 μm, or 85 μm, or 90 μm, or 95 μm, or 100 μm.
In embodiments, the first film does not include a migrating slip agent, such as an unsaturated fatty acid amide (e.g., erucamide and oleamide).
In an embodiment, the first film is a coextruded multilayer structure. For example, some methods for constructing films are by cast coextrusion or blown coextrusion methods. Combinations of these methods are also possible.
In an embodiment, the first film is not an alignment film. In further embodiments, the first film is not biaxially oriented. In other words, in some embodiments, the first film is not stretched after extrusion.
Second film
The laminate includes a second film. The first film is laminated to the second film.
The second film may be a monolayer film or a multilayer film. The second multilayer film contains two or more layers. For example, the second multilayer film can have two, three, four, five, six, seven, eight, nine, ten, eleven, or more layers. In embodiments, the second multilayer film contains only two layers or only three layers.
In an embodiment, the second film is a monolayer film having only one layer.
The second membrane is in contact with the first membrane. The second membrane may be in direct contact or indirect contact with the first membrane. In an embodiment, the second membrane directly contacts the first membrane. In another embodiment, the second membrane is in indirect contact with the first membrane.
The second membrane has two opposing surfaces.
In an embodiment, the second film comprises a layer comprising a component selected from the group consisting of: a fourth ethylene-based polymer, a propylene-based polymer, a polyamide (e.g., nylon), a polyester, an ethylene vinyl alcohol (EVOH) copolymer, polyethylene terephthalate (PET), an ethylene vinyl acrylate copolymer, an ethylene methyl acrylate copolymer, an ethylene ethyl acrylate copolymer, an ethylene butyl acrylate copolymer, an ethylene acrylic acid copolymer, an ethylene methacrylic acid copolymer, an ethylene acrylic acid ionomer, a methacrylic acid ionomer, a maleic anhydride grafted ethylene-based polymer, polystyrene, a metal foil, and combinations thereof. In an embodiment, the second film comprises a layer comprising a component selected from the group consisting of: PET, EVOH copolymers, polyamides, and combinations thereof. In an embodiment, the second film comprises a layer comprising PET.
In an embodiment, the thickness of the second film is 5 μm, or 8 μm, or 10 μm, or 12 μm, or 15 μm to 20 μm, or 25 μm, or 30 μm, or 35 μm, or 40 μm, or 45 μm, or 50 μm, or 55 μm, or 60 μm, or 65 μm, or 70 μm, or 75 μm, or 80 μm, or 85 μm, or 90 μm, or 100 μm, or 150 μm.
In an embodiment, the outermost surface of the second film is the outermost surface of the laminate.
The second film may comprise two or more embodiments disclosed herein.
Optional adhesive layer
In an embodiment, the laminate comprises an optional adhesive layer. The adhesive layer is in contact with the first film and the second film.
The adhesive layer has two opposing surfaces. In an embodiment, the adhesive layer is a continuous layer having two opposing surfaces. The adhesive layer is in contact with the first film. The adhesive layer may be in direct contact or indirect contact with the first film. In an embodiment, the adhesive layer directly contacts the first film. In another embodiment, the adhesive layer indirectly contacts the first film.
The adhesive layer contains an adhesive. Non-limiting examples of suitable binders include polyurethane binders, polyacrylate binders, and combinations thereof. Non-limiting examples of suitable polyurethane adhesives include MOR-FREE, each available from Rohm and HaasTM706A/C-79 (solvent free polyurethane adhesive); and MOR-FREETM715A/CR-84 (solvent free polyester based polyurethane adhesive); and MOR-FREETM698A/C-79 (solvent free polyether based polyurethane adhesive). A non-limiting example of a suitable polyacrylate binder is ROBONDTML-168/CR3A, a water-based polyacrylate adhesive available from the Dow chemical company.
In an embodiment, the adhesive layer has a coat weight of 0.5 grams per square meter (g/m)2) Or 1.0g/m2Or 1.5g/m2Or 1.8g/m2Or 1.9g/m2To 2.0g/m2Or 2.5g/m2Or 3.0g/m2。
The adhesive layer may comprise two or more embodiments disclosed herein.
In embodiments, the laminate has a COF of less than 0.55, or 0.01, or 0.05, or 0.10, or 0.20, or 0.25 to 0.27, or 0.28, or 0.29, or 0.30, or 0.35, or 0.40, or 0.45, or 0.49, or 0.50, or 0.54, or 0.55 at 12 meters/minute.
In embodiments, the adhesive layer contains a polyether-based polyurethane adhesive and the laminate has a COF of 0.10, or 0.20, or 0.30, or 0.40, or 0.45 to 0.54, or 0.55 at 12 meters per minute.
In embodiments, the adhesive layer contains a polyester-based polyurethane adhesive and the laminate has a COF of 0.10, or 0.20, or 0.30, or 0.40, or 0.45 to 0.49, or 0.50 at 12 meters per minute.
In an embodiment, the laminate comprises, consists essentially of, or consists of:
a first film comprising, consisting essentially of, or consisting of:
(1) a sealant layer comprising, consisting essentially of, or consisting of:
(A) 70 wt%, or 75 wt%, or 80 wt%, or 85 wt%, or 90 wt% to 93 wt%, or 94 wt%, or 95 wt%, or 96 wt%, or 97 wt%, or 98 wt%, or 99 wt%, or 99.9 wt% of an ethylene-based polymer (such as an ethylene plastomer/elastomer, LDPE, LLDPE, or a combination thereof) based on the total weight of the sealant layer;
(B)0.1 wt%, or 0.2 wt%, or 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 1.5 wt%, or 1.8 wt% to 2.0 wt%, or 2.3 wt%, or 2.5 wt%, or 2.8 wt%, or 3.0 wt%, or 3.5 wt%, or 4.0 wt%, or 4.5 wt%, or 5.0 wt% of the slip agent blend, based on the total weight of the sealant layer; and
(C) optionally, 0 wt%, or 0.01 wt%, or 0.05 wt%, or 0.1 wt%, or 0.2 wt% to 0.3 wt%, or 0.4 wt%, or 0.5 wt%, or 1.0 wt%, or 2.0 wt%, or 3.0 wt%, or 4.0 wt%, or 5.0 wt% of an additive, based on the total weight of the sealant layer; and
the slip agent blend contains:
(i)1 wt%, or 5 wt%, or 10 wt%, or 15 wt%, or 20 wt% to 25 wt%, or 30 wt%, or 35 wt%, or 40 wt%, or 45 wt%, or 49 wt%, or less than 50 wt% of a first PDMS (e.g., a dimethylhydroxysilyl terminated PDMS) having an Mn of 30,000g/mol, or 40,000g/mol, or 45,000g/mol, or 48,000g/mol to 49,000g/mol, or 50,000g/mol, or 55,000g/mol, or 60,000g/mol, or 65,000g/mol, or 70,000g/mol, or 75,000g/mol, or 80,000g/mol, or 90,000g/mol, or 100,000g/mol, or 150,000g/mol, or 200,000g/mol, or 250,000g/mol, based on the total weight of the slip agent blend; and
(ii) greater than 50 wt%, or 51 wt%, or 55 wt%, or 60 wt%, or 65 wt%, or 70 wt%, or 75 wt% to 80 wt%, or 85 wt%, or 90 wt%, or 95 wt%, or 99 wt% of a second end-capped PDMS (such as a dimethylvinylsilyl PDMS) having an Mn of 300,000g/mol, or 320,000g/mol, or 330,000g/mol, or 340,000g/mol, or 350,000g/mol to 360,000g/mol, or 370,000g/mol, or 380,000g/mol, or 390,000g/mol, or 400,000g/mol, or 450,000g/mol, or 500,000g/mol, or 550,000g/mol, or 600,000g/mol, or 750,000g/mol, or 1,000,000g/mol, based on the total weight of the slip agent blend;
(2) optionally, a core layer in contact with the sealant layer, the core layer comprising a second ethylene-based polymer (such as LLDPE, LDPE, or a combination thereof) and optionally, additives;
(3) optionally, contacting with the core layer a release layer comprising a third ethylene-based polymer (such as LLDPE, LDPE, or a combination thereof) and optionally, additives;
a second film comprising a layer comprising a component selected from the group consisting of: PET, EVOH copolymers, polyamides, or combinations thereof; and
optionally, an adhesive layer comprising an adhesive (e.g., a polyurethane adhesive) in contact with the first film and the second film; and
the laminate has one, some or all of the following properties:
(i) the thickness of the sealant layer is 5 μm, or 7 μm, or 10 μm to 15 μm, or 20 μm, or 25 μm, or 30 μm, or 35 μm, or 40 μm, or 45 μm, or 50 μm; and/or
(ii) The sealant layer is 10 vol%, or 15 vol%, or 20 vol% to 25 vol%, or 30 vol%, or 40 vol%, or 50 vol%, or 60 vol%, or 70 vol%, or 80 vol%, or 90 vol%, or 95 vol% of the first film, based on the total volume of the first film; and/or
(iii) The core layer has a thickness of 5 μm, or 8 μm, or 10 μm, or 15 μm, or 20 μm, or 25 μm, or 30 μm to 35 μm, or 40 μm, or 45 μm, or 50 μm, or 55 μm, or 60 μm, or 70 μm, or 80 μm; and/or
(iv) The core layer is 10 vol%, or 15 vol%, or 20 vol%, or 25 vol%, or 30 vol%, or 40 vol%, or 50 vol%, or 60 vol% to 65 vol%, or 70 vol%, or 80 vol%, or 90 vol% of the first film, based on the total volume of the first film; and/or
(v) The thickness of the release layer is 5 μm, or 8 μm, or 10 μm to 15 μm, or 20 μm, or 25 μm, or 30 μm, or 35 μm, or 40 μm, or 45 μm, or 50 μm; and/or
(vi) The release layer is 10 vol%, or 15 vol%, or 20 vol% to 25 vol%, or 30 vol%, or 40 vol%, or 50 vol%, or 60 vol%, or 70 vol%, or 80 vol%, or 90 vol%, or 95 vol% of the first film, based on the total volume of the first film; and/or
(vii) The first film has a thickness of 15 μm, or 20 μm, or 30 μm, or 40 μm, or 50 μm to 60 μm, or 65 μm, or 70 μm, or 75 μm, or 80 μm, or 85 μm, or 90 μm, or 95 μm, or 100 μm; and/or
(viii) The second film has a thickness of 5 μm, or 8 μm, or 10 μm, or 12 μm, or 15 μm to 20 μm, or 25 μm, or 30 μm, or 35 μm or 40 μm, or 45 μm, or 50 μm; and/or
(ix) The outermost surface of the sealant layer is the outermost surface of the laminate; and/or
(x) The laminate has a COF of 0.01, or 0.05, or 0.10, or 0.20, or 0.25 to 0.27, or 0.28, or 0.29, or 0.30, or 0.35, or 0.40, or 0.45, or 0.49, or 0.50, or 0.54, or 0.55 at 12 meters/min.
It is understood that the sum of the components in each of the layers disclosed herein, including the aforementioned layers, yields 100 weight percent (wt%) based on the total weight of the respective layer. It is also understood that the sum of the volumes of each of the layers disclosed herein, including the aforementioned layers, yields 100 volume percent (vol%) based on the total volume of the respective film.
In an embodiment, the laminate has the following structure (III):
first film/adhesive layer/second film structure (III).
In an embodiment, the first film is a multilayer film having a sealant layer, a core layer, and a release layer; and the second film is a monolayer film comprising PET; and the laminate has the following structure (IV):
sealant layer/core layer/release layer/adhesive layer/second film structure (IV).
In an embodiment, the laminate comprises 1 to 10 repeating layers of an adhesive layer and a second film, wherein each adhesive layer may be the same or different from the other adhesive layer or layers, and each second film may be the same or different from the other second film or films. In further embodiments, the laminate has the following structure (V):
first film/adhesive layer/second film structure (V).
The laminate may comprise two or more embodiments disclosed herein.
The present disclosure also provides articles containing the laminate as packaging. Non-limiting examples of suitable packaging include food packaging and specialty packaging (e.g., stand-up pouches, pillow pouches, and trays wrapped in film).
In an embodiment, the article is a pillow pouch. In an embodiment, the pillow pouch comprises a single sheet of laminate folded over itself. The three unattached edges are then heat sealed after the contents are placed between the folded layers. The heat seal includes a top seal, a bottom seal, and a center fold seal. The storage space is defined by the area between the folded sheets and within the heat seal. The storage space is sealed from the surrounding environment and contains the contents of the pouch, e.g. a food product. In an embodiment, the pillow bag is an airtight bag. Although the package is described as having a single sheet, it should be apparent to those skilled in the art that more than one sheet may be used. In an embodiment, the pillow bags are formed on a Vertical Form Fill Seal (VFFS) line. In an embodiment, the pillow bags are formed on a VFFS production line forming more than 90 airtight bags per minute (p-p-m), or 100 p-p-m, or 120 p-p-m, or 130 p-p-m, or 140 p-p-m, or 150 p-p-m, or 160 p-p-m to 170 p-p-m, or 180 p-p-m, or 190 p-p-m, or 200 p-p-m.
An article of manufacture may comprise two or more embodiments disclosed herein.
By way of example, and not limitation, some embodiments of the disclosure will now be described in detail in the following examples.
Examples of the invention
The materials used in the examples are provided in table 1 below.
TABLE 1
1Based on the average of three samples.
Multilayer film samples were made on an Alpine coextrusion line under the following conditions: average film thickness 50 μm; blow-up ratio (b.u.r.) -2.5; the diameter of the die is 200 mm; the die gap is 2.5 mm; temperature curve-extruder a 150-; temperature curve-extruder B200-; temperature profile-extruder C200-; the temperature of the mould is 220 ℃; corona treatment-40 dynes; the output rate is 120 kg/h; and a layer distribution ratio of 15:70:15(a: B: C). The bubble was opened and cut into rolls of 40cm wide.
The layer configuration is provided in table 2 below. Each multilayer film structure is formed from (a) a sealant layer having a volume of 15% by volume of the multilayer film, (B) a core layer having a volume of 70% by volume of the multilayer film, and (C) a release layer having a volume of 15% by volume of the multilayer film. The multilayer film has the following structure: sealant layer (A)/core layer (B)/release layer (C). The sealant layer is in direct contact with the core layer, and the core layer is in direct contact with the release layer. In table 2, "CS" refers to a comparative sample.
Each PDMS was included in the sealant layer as part of a masterbatch (MB25-502, MB25-635, MB25-035, or MB50-613), with the PDMS dispersed in either an LDPE matrix or an LLDPE matrix. Table 2 provides the individual amounts of each PDMS and LDPE/LLDPE matrix included in the sealant layer. For example, the sealant layer of film example 1 included 0.5 wt% PDMS a from MB25-502 (with an Mn of 48,400g/mol, as provided in table 1) and 1.5 wt% LDPE a from MB25-502, based on the total weight of the sealant layer. Thus, the sealant layer of film example 1 contained a total amount of 2.0 wt% MB25-502, based on the total weight of the sealant layer. The sealant layer of film example 1 also included 1.5 wt% PDMS B from MB25-635 (with Mn of 356,700g/mol, as provided in table 1) and 4.5 wt% LDPE B from MB25-635, based on the total weight of the sealant layer. Thus, the sealant layer of film example 1 contained a total amount of 6.0 wt% MB25-635, based on the total weight of the sealant layer.
Multilayer film samples were tested for COF. The results are provided in table 2 below.
TABLE 2 multilayer film samples
Awt% based on the total weight of the sealant layer.Bwt% based on the total weight of the core layer.
Cwt% based on the total weight of the release layer.DIn% by weight according to AFFINITYTMTotal weight of PL 1881G.
Ewt% according to DOWTMTotal weight of LDPE 312E.The sealant layer COF at 100 mm/min was measured according to ISO 8295.
+Total wt% slip agent refers to the total amount of slip agent present in the sealant layer, based on the total weight of the sealant layer.
～By slip agents in the sealant layerMn is in the range of 30,000g/mol to less than 300,000g/mol wt% of PDMS, based on the total weight.
≈Mn is in the range of 300,000g/mol to 2,000,000g/mol wt% of PDMS based on the total weight of slip agent in the sealant layer.
□The sealant layer COF at 12 meters/minute was measured on an "on-line" COF test apparatus.
The multilayer film samples of Table 2 were passed through a Labo Combi from Nodemeck Group (Nordmedica Group)TMAn L400 laminator (pilot coater) was laminated to the PET film (12 μm thick) with an adhesive. During lamination, the multilayer film samples of table 2 were placed on a first tape spool, placed on a first unwinder at a tension of 1.7kg, and the PET film was placed on a second tape spool, placed on a second unwinder at a tension of 2 kg. The laminator was equipped with three chromium plated steel rollers heated at 45 ℃. The PET film was coated with adhesive by pouring the adhesive between the batch rolls while unwinding from the first unwinder. The adhesive was added at 1.9g/m2The coating weight of (a) was applied to the PET film. The adhesive coated PET film was then pressed against the multilayer film sample as it was unwound from the second unwinder via a lamination calender and a pressure roller. The laminator speed was 100 m/min, the nip temperature was 50 ℃ and the pressure was 3bar (300 kilopascals (kPa)). The laminate was then wound on a winding reel with a tension of 4 kg. The laminate was cured at room temperature (23 ℃) for 6 days. The resulting laminate has the following structure (a): multilayer film sample/adhesive layer/PET film. In other words, the resulting laminate has the following structure (a): sealant layer/core layer/release layer/adhesive layer/PET film. The laminate structure configuration is provided in table 3 below.
The laminate structure was tested for COF. The results are provided in table 3 below.
TABLE 3 laminate of Structure (A) (multilayer film sample/adhesive layer/PET film)
AMultilayer film samples of Table 2NM not measured
B715A/CR-84＝MOR-FREETM715A/CR-84 698A/C-79＝MOR-FREETM698A/MOR-FREETMC-79
CThe bag of CS 15 was equipped with Nitoflon around the central block of the feeding unitTMAdhesive tapes were prepared on a VFFS line.
□The laminate COF at 12 meters/min was measured on an "on-line" COF test apparatus.
Applicants have surprisingly found that a film comprising the same PET film and adhesive layer but having a composition comprising (A) an ethylene-based polymer (AFFINITY)TMPL 1880G and LDPE) and (B) a single slip agent (film CS 2) -rather than a sealant layer of a slip agent blend (CS 10, CS 15, CS 17) compared to a comparative laminate having a PET film, an adhesive layer and a sealant layer containing (a) an ethylene-based polymer (AFFINITY)TMPL 1880G and LDPE or LLDPE) and (B) a slip agent blend comprising (i) a first pdms having an Mn of 30,000 to less than 300,000G/mol (pdms a); and (ii) a second PDMS (PDMS B, PDMS C, PDMSD)) having an Mn of from 300,000g/mol to 2,000,000g/mol (Ex.12-Ex.19) advantageously exhibits a lower laminate COF at 12 m/min (for a laminate having a surface containing MOR-FREE)TM698A/MOR-FREETMA laminate of an adhesive layer of C-79,<0.56) (for the polypeptide with MOR-FREE)TM715A/CR-84,<0.52)。
the laminate was then mounted in a Bosch frameTMThe pillow pouch is formed on a Vertical Form Fill Seal (VFFS) line (model SVE2520 WR). The VFFS production line is a continuous motion vertical bagger. For CS 15, the VFFS line was equipped with Nitoflon from nitto Denko around the center block of the feed unitTMAdhesive tape to reduce friction between the sealant layer of the laminate and the metal center feed block of the VFFS production line. The pillow pouch is formed from a single piece of laminate that is folded over itself and heat sealed to form a top seal, a bottom seal, and a center fold seal. The pillow pouch had a length of 230mm and a width of 150 mm. The sealing strip temperature was set at 180 ℃ with a sealing time of 50 milliseconds and pressureThe force was 2.5 kilonewtons. The speed of the VFFS production line is measured in number of airtight bags formed per minute (p-p-m). No filler was used during the test. The results are provided in table 3 above.
The air tightness of the pillow bags was tested by placing 10 pillow bags under water in a closed tank, in which a vacuum of 0.6bar (60kPa) was applied. After 30 seconds, the pillow pouch was visually inspected. If no air bubbles come out of the pillow bag, the pillow bag is considered to be airtight. If air bubbles come out of the pillow bag, the pillow bag is considered to be non-airtight. The percentage of air tightness is the percentage of pillow bags found to be air tight. The results are reported in table 3.
As shown in Table 3, pillow bags made from the comparative laminates were either (i) not formable (CS 10 and CS 17) or (ii) at a low speed (i.e., a low speed)<100 p-p-m) (CS 15), the comparative laminate comprising a sealant layer comprising: (A) ethylene-based polymers (AFFINITY)TMPL 1880G and LDPE) and (B) a single slip agent (film CS 2) -rather than a slip agent blend.
Applicants have surprisingly found that pillow bags formed from a laminate comprising a sealant layer comprising: (A) ethylene-based polymers (AFFINITY)TMPL 1880G and LDPE or LLDPE) and (B) a slip agent blend comprising (i) a first pdms having an Mn of 30,000 to less than 300,000G/mol (pdms a); and (ii) a second PDMS (PDMS B, PDMS C or PDMS D) having an Mn of 300,000 to 2,000,000 g/mol.
It is specifically intended that the present disclosure not be limited to the embodiments and illustrations contained herein, but include modified forms of those embodiments including portions of the embodiments and combinations of elements of different embodiments as come within the scope of the following claims.
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