阅读说明：本技术 一种油墨转移介质及其制备方法 (Printing ink transfer medium and preparation method thereof ) 是由 徐佳 徐益良 高杰良 于 2020-04-22 设计创作，主要内容包括：本发明公开了一种油墨转移介质,所述油墨转移介质包括：第一基材层；气垫层,位于所述第一基材层上；第二基材层,位于所述气垫层上；面胶层,位于所述第二基材层上；其中,所述气垫层在所述第一基材层上的渗入厚度小于等于所述第一基材层上的厚度,所述第一基材层和所述第二基材层之间的层间粘合力大于等于1.5KN/m,所述油墨转移介质的有机溶剂残留量小于等于0.1PPM。根据本发明提供的油墨转移介质安全环保,且稳定性好、强度大、回弹性好,印刷速度可达到1.5万印的高速印刷。(The invention discloses an ink transfer medium, comprising: a first base material layer; the air cushion layer is positioned on the first base material layer; the second substrate layer is positioned on the air cushion layer; the surface adhesive layer is positioned on the second base material layer; the air cushion layer is arranged on the first base material layer, the permeation thickness of the air cushion layer on the first base material layer is smaller than or equal to the thickness of the air cushion layer on the first base material layer, the interlayer adhesive force between the first base material layer and the second base material layer is larger than or equal to 1.5KN/m, and the residual quantity of organic solvents of the ink transfer medium is smaller than or equal to 0.1 PPM. The ink transfer medium provided by the invention is safe and environment-friendly, and has the advantages of good stability, high strength and good rebound resilience, and the printing speed can reach 1.5 ten thousand prints of high-speed printing.)

1. An ink transfer media, comprising:

a first base material layer;

the air cushion layer is positioned on the first base material layer;

the second substrate layer is positioned on the air cushion layer;

the surface adhesive layer is positioned on the second base material layer;

the air cushion layer is arranged on the first base material layer, the permeation thickness of the air cushion layer on the first base material layer is smaller than or equal to the thickness of the air cushion layer on the first base material layer, the interlayer adhesive force between the first base material layer and the second base material layer is larger than or equal to 1.5KN/m, and the residual quantity of organic solvents of the ink transfer medium is smaller than or equal to 0.1 PPM.

2. The ink transfer media of claim 1, wherein the variation in surface irregularities of the ink transfer media is 0.03mm or less.

3. The ink transfer medium of claim 1, wherein the ink transfer medium has a compressibility of 0.12-0.24mm at printing loads of 800-1500Kpa and the ink transfer medium 10 has a compressibility of 0.20-0.32mm at printing loads of 1800-2500 Kpa.

4. The ink transfer medium of claim 1, wherein the first substrate layer comprises,

a first cloth layer;

the first adhesive layer is positioned on the first cloth layer;

and the second cloth layer is positioned on the first bonding layer.

5. The ink transfer medium of claim 4, wherein the first cloth layer has a thickness equal to or greater than the thickness of the second cloth layer.

6. A method for preparing an ink transfer medium, comprising the steps of:

providing a first base material layer, an air cushion layer, a second base material layer and a surface glue layer;

pressing the air cushion layer on the first base material layer;

pressing the second base material layer on the air cushion layer, and performing first-stage vulcanization;

pressing the surface adhesive layer on the second base material layer, and performing second-stage vulcanization;

the air cushion layer is arranged on the first base material layer, the permeation thickness of the air cushion layer on the first base material layer is smaller than or equal to the thickness of the air cushion layer on the first base material layer, the interlayer adhesive force between the first base material layer and the second base material layer is larger than or equal to 1.5KN/m, and the residual quantity of organic solvents of the ink transfer medium is smaller than or equal to 0.1 PPM.

7. The method of claim 6, wherein the pressing comprises pressing at a calendaring apparatus, wherein the calendaring parameters comprise:

the temperature is 100-170 ℃;

the pressure is 5-12 MPa;

the roller spacing is 0.05-5 mm;

the calendering speed is 5-15 m/h.

8. The method of claim 6, wherein the first stage curing process comprises curing in an environment of 0 to 0.1 kg.

9. The method of making an ink transfer medium of claim 6, wherein the second stage curing process comprises curing in an environment of 0.5 kg to 3 kg.

10. The method of making an ink transfer media of claim 6, further comprising a process of polishing the surface of the ink transfer media.

Technical Field

The invention belongs to the technical field of printing, and particularly relates to an ink transfer medium and a preparation method thereof.

Background

In the field of offset printing, an ink transfer medium can be wound on a transfer cylinder so as to transfer ink on a printing plate to the surface of a printing stock, and the performance requirement of the ink transfer medium is higher and higher along with the development of the printing industry.

The ink transfer medium generally has a multi-layer structure, and when the ink transfer medium is prepared, a coating process is used between multiple layers, however, the coating process needs to use an organic solvent (such as benzene, benzyl, xylene, and the like), so that not only the ink transfer medium cannot be used due to the mutual infiltration between multiple layers, but also the organic solvent is harmful to the health and has great environmental pollution. Therefore, it is important to provide a new ink transfer medium.

Disclosure of Invention

In view of the above-mentioned disadvantages of the prior art, it is an object of the present invention to provide an ink transfer medium that solves the problems of the prior art, such as environmental inefficiency and poor performance.

It is another object of the present invention to provide a method of making an ink transfer medium as described above.

To achieve the above and other related objects, a first aspect of the present invention provides an ink transfer medium comprising: a first base material layer; the air cushion layer is positioned on the first base material layer; the second substrate layer is positioned on the air cushion layer; the surface adhesive layer is positioned on the second base material layer; the air cushion layer is arranged on the first base material layer, the permeation thickness of the air cushion layer on the first base material layer is smaller than or equal to the thickness of the air cushion layer on the first base material layer, the interlayer adhesive force between the first base material layer and the second base material layer is larger than or equal to 1.5KN/m, and the residual quantity of organic solvents of the ink transfer medium is smaller than or equal to 0.1 PPM.

In one embodiment of the present disclosure, the variation of the surface unevenness of the ink transfer medium is 0.03 mm.

In one embodiment of the present disclosure, the compressibility of the ink transfer medium is 0.12-0.24mm under the printing load of 800-1500Kpa, and the compressibility of the ink transfer medium 10 is 0.20-0.32mm under the printing load of 1800-2500 Kpa.

In a specific embodiment of the disclosure, the first substrate layer includes a first fabric layer; the first adhesive layer is positioned on the first cloth layer; and the second cloth layer is positioned on the first bonding layer.

In an embodiment of the disclosure, the thickness of the first fabric layer is greater than or equal to the thickness of the second fabric layer.

The invention provides a preparation method of an ink transfer medium, which comprises the steps of providing a first substrate layer, an air cushion layer, a second substrate layer and a surface glue layer; pressing the air cushion layer on the first base material layer; pressing the second base material layer on the air cushion layer, and performing first-stage vulcanization; pressing the surface adhesive layer on the second base material layer, and performing second-stage vulcanization;

the air cushion layer is arranged on the first base material layer, the permeation thickness of the air cushion layer on the first base material layer is smaller than or equal to the thickness of the air cushion layer on the first base material layer, the interlayer adhesive force between the first base material layer and the second base material layer is larger than or equal to 1.5KN/m, and the residual quantity of organic solvents of the ink transfer medium is smaller than or equal to 0.1 PPM.

In a specific embodiment disclosed in the present invention, the pressing process includes pressing in a rolling device, wherein the rolling parameters include: the temperature is 100 ℃. + 170 ℃; the pressure is 5-12 MPa; the roller spacing is 0.05-5 mm; the calendering speed is 5-15 m/h.

In a specific embodiment of the present disclosure, the first stage of vulcanization includes vulcanization under an environment of 0-0.1 kg.

In one embodiment of the present disclosure, the second stage vulcanization process comprises vulcanizing in an environment of 0.5-3 kg.

In one embodiment of the present disclosure, the method further comprises polishing the surface of the ink transfer medium.

As described above, the present invention provides an ink transfer medium and a method of making the same. Utilize the calendering process will form the multilayer structure of printing ink transfer medium, in this printing ink transfer medium the air cushion layer is in infiltration thickness on the first substrate layer is less than or equal to thickness on the first substrate layer, first substrate layer with the interlaminar adhesive force between the second substrate layer is more than or equal to 1.5KN/m, the organic solvent residual amount of printing ink transfer medium is less than or equal to 0.1PPM, has avoided coating process to cause the problem of infiltrating, has improved the qualification rate of product, has avoided wasting of resources and environmental pollution problem, has also improved operational environment simultaneously. In addition, the ink transfer medium provided by the invention has the advantages of good stability, high strength and good rebound resilience, and the printing speed can reach 1.5 ten thousand prints of high-speed printing. Other features and advantages may be apparent from the following claims and from the description.

Drawings

FIG. 1 shows a schematic representation of an ink transfer medium provided in accordance with the present invention in use.

FIG. 2 is a schematic structural diagram of an embodiment of an ink transfer medium according to the present invention.

FIG. 3 is a schematic structural diagram of another embodiment of an ink transfer medium according to the present invention.

FIG. 4 is a schematic diagram showing the cell structure of the air-cushion layer in the ink transfer medium provided by the present invention.

FIG. 5 shows an optical microscope photograph at 100 times magnification of a gas cushion layer in an ink transfer medium provided by the present invention.

Fig. 6 shows an optical microscope photograph of the box portion of fig. 5 at 1000 x magnification.

FIG. 7 shows the roughness of a size layer in an ink transfer medium provided in accordance with the present invention.

FIG. 8 is a front view of the appearance of a size layer in an ink transfer medium provided in accordance with the present invention.

FIG. 9 is a schematic flow chart illustrating a method of preparing an ink transfer medium according to an embodiment of the present invention.

FIG. 10 illustrates an exemplary block diagram of an ink transfer media manufacturing apparatus provided in accordance with the present invention.

Fig. 11 is a schematic view showing the structure of the rolling apparatus of fig. 10.

Fig. 12 is a test chart showing the flatness of the ink transfer medium prepared in comparative example 1.

FIG. 13 is a graph showing the flatness test of ink transfer media prepared in examples 1-8.

Detailed Description

The present invention is further illustrated by the following specific examples, but it should be noted that the specific material ratios, process conditions, results, etc. described in the examples of the present invention are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the scope of the present invention. Note that "%" shown in the description herein means "part by mass" unless otherwise specified.

As used herein, the singular forms "a", "an" and "the" include the plural forms unless the context clearly dictates otherwise. Thus, for example, reference to "a compound" includes a plurality of such compounds, and reference to "a component" or "an additive" means that one or more components or additives, and equivalents thereof, and the like, known to those skilled in the art can be employed.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice of the present invention, the preferred methods, devices, and materials are described below. All publications mentioned herein are intended to describe and disclose the various layers, compounds, compositions, methods, and the like, which are reported in the publications and which may be used in connection with the invention.

As shown in fig. 1, the present invention provides an ink transfer medium 10, wherein the ink transfer medium 10 can be coated on a transfer cylinder 101 of an offset printing press 100, so that ink is directly transferred from the surface of the ink transfer medium 10 to a printing material 30 as a medium for ink transfer in a lithographic (offset) process. Specifically, this can be achieved by a process including rotating a transfer cylinder 101 coated with the ink transfer medium 10 in close contact with a plate cylinder 102 having characters and images formed thereon and provided with printing ink, so that the characters and images on the printing plates 20 located at the plate cylinder 102 are transferred onto the ink transfer medium 10, and then the characters and images on the ink transfer medium 10 are (transferred and) positioned on a substrate 30 such as a sheet of paper of an impression roller 103, which is conveyed in close contact with the ink transfer medium 10, to perform printing.

As shown in fig. 2, the ink transfer medium 10 provided by the present invention includes a first substrate layer 11, an air-cushion layer 12, a second substrate layer 13, and a topcoat layer 14. The ink transfer medium 10 is formed as a laminate having a multilayer structure, the first base material layer 11 is an innermost layer and covers the transfer cylinder 101 of the printing press 100, the size layer 14 is an outermost layer, and the ink on the printing plate 20 of the plate cylinder 102 is transferred by adhering to the size layer 14 of the ink transfer medium 10.

The thickness of the ink transfer medium 10 is the sum of the thicknesses of the first base material layer 11, the air cushion layer 12, the second base material layer 13, and the surface adhesive layer 14 forming the ink transfer medium 10, and is, for example, 1.8 to 2.5mm, and further, is, for example, 1.95mm, 2.00mm, and 2.05mm, because the ink transfer medium 10 has a desirable strength and is not easily deformed. Further, the thickness of the ink transfer medium 10 varies by, for example, 0.03mm or less, for example, 0.01mm or 0.02 mm.

The ink transfer medium 10 has a shore a hardness of, for example, 70 ° to 85 °, such as 76 °, 78 °, 81 °; has a tensile strength of 80KN/m or more, further 90KN/m or more, for example, 95KN/m, 100KN/m, 105 KN/m; has an elongation of 2.0% or less, further 1.6% or less, such as 1.4%, 1.0%, 0.9%; and has a compressibility of 0.10 to 0.18mm, such as 0.20mm, 0.66mm, 0.1mm, and more specifically in some embodiments, a compressibility of the ink transfer medium 10 of, for example, 0.12 to 0.24mm, such as 0.14mm, under a print load of 800-1500Kpa, such as 1060Kpa, and a compressibility of the ink transfer medium 10 of, for example, 0.20 to 0.32mm, such as 0.21mm, under a print load of 1800-2500Kpa, such as 2060 Kpa. The interlayer adhesion between the multiple layers of the ink transfer medium 10 is not less than 1.5KN/m, and more specifically not less than 1.8KN/m, and the surface roughness Ra of the ink transfer medium 10 is 0.8 to 1.4 [ mu ] m, for example, 0.9 [ mu ] m, 1.0 [ mu ] m, and 1.3 [ mu ] m.

The organic solvent residue in the ink transfer medium 10 refers to a sum of organic solvent residues of each of the first substrate layer 11, the air cushion layer 12, the second substrate layer 13, and the surface adhesive layer 14 forming the ink transfer medium 10, which is less than or equal to 0.1PPM, further less than or equal to 0.05PPM, and further still, the organic solvent residue is 0, and specifically, in some embodiments, the organic solvent residue may be avoided or greatly reduced in the process of manufacturing the ink transfer medium 10 by using the first substrate layer 11, the air cushion layer 12, the second substrate layer 13, and the surface adhesive layer 14.

In some examples, the organic solvent in the ink transfer medium 10 may be selected from ketone solvents, for example, dialkyl ketones such as acetone, methyl ethyl ketone, methyl n-propyl ketone, methyl isopropyl ketone, diethyl ketone, methyl n-butyl ketone, methyl isobutyl ketone, methyl sec-butyl ketone, and methyl tert-butyl ketone, cyclic ketones such as cyclopentanone, cyclohexanone, and cycloheptanone, and the like. Further, the material is selected from acetone, butanone and cyclohexanone.

In some embodiments, the organic solvent in the ink transfer medium 10 may be selected from, for example, aromatic solvents, specifically, toluene, benzene, p-xylene, o-xylene, m-xylene, ethylbenzene, naphthalene, acetophenone, benzyl alcohol, ethyl benzoate, benzoic acid, phthalate esters (e.g., dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), di-n-octyl phthalate (DOP), di-iso-octyl phthalate (DEHP), and Butyl Benzyl Phthalate (BBP)), and the like. Further, it is selected from benzene, toluene, xylene, and phthalate.

In some embodiments, the organic solvent in the ink transfer medium 10 may be selected from ester solvents, and specifically, alkyl esters such as ethyl acetate, propyl acetate, isopropyl acetate, and butyl acetate, alkoxyalkyl esters such as 1-methoxy-2-propyl acetate, and cyclic esters such as β -propiolactone, α -methyl- γ -butyrolactone, -caprolactone, and γ -valerolactone.

In some examples, the organic solvent in the ink transfer medium 10 may be selected from amide solvents, and specific examples thereof include alkylamides such as N, N-dimethylformamide, N-dimethylacetamide, N-diamylacetamide, and N, N-di-tert-butylacetamide, alkoxyalkylamides such as N, N-dimethoxypropylacetamide, 3-methoxy-N, N-dimethylpropionamide, and 3-N-butoxy-N, N-dimethylpropionamide, and cyclic amides such as 1, 3-dimethyl-2-imidazolidinone, and N-methyl-2-pyrrolidone.

In some embodiments, the organic solvent in the ink transfer medium 10 may be selected from ether solvents, specifically, mono-or dialkyl ethers such as ethylene glycol and diethylene glycol, cyclic ethers such as dioxane and tetrahydrofuran, and aromatic ethers such as anisole.

Referring next to fig. 2, in some embodiments, the first substrate layer 11 includes a first fabric layer 111, a first adhesive layer 112 and a second fabric layer 113, for example, the first fabric layer 111 and the second fabric layer 113 may be of the same or different structures, such as long stapled cotton cloth, linen cloth, non-woven cloth, etc., the first substrate layer 111 formed by the first fabric layer 111 and the second fabric layer 113 is a supporting framework of the ink transfer medium 10, and from the viewpoint of ensuring that the ink transfer medium 10 has sufficient radial tensile strength and elongation as small as possible to obtain good applicability, for example, long stapled cotton cloth, linen cloth, non-woven cloth, etc., such as long stapled cotton cloth, further, the first fabric layer 111 and/or the second fabric layer 113 has a thickness of 0.3-0.5mm, such as 0.35mm, 0.37mm, 0.39mm, 0.4mm, and a seam of 0.03 mm-0.8 mm (i.e., a gap between the warp yarn and the weft yarn), e.g. 0.04mm, 0.06mm, 0.069mm, having a particle size of 180-²Gram weight of (2), e.g. 200g/m²、220g/m²Has a radial strength of 1800KN/m or more, further 1900 or more, such as 1950, 2000, 2200, and more importantly, said first fabric layer 111 has a radial elongation of 5% or less, further 4.8% or less, such as 4.5%, 4%, and has a constant load elongation of 1.6% or less, further 1.5% or less, such as 1.4%, 1.3%. The first fabric material within the above range is not elongated, is not broken, and is not deformed, has a good affinity with the air cushion layer 12 and the surface adhesive layer 14, and is easily adhered to and not easily detached from the air cushion layer and the surface adhesive layer, so that the first base material layer 11 based on the first fabric material can make the ink transfer medium 10 bear a radial force of 500kg or more, further, bear a radial force of 1000kg without being deformed, and has good compressibility and flexibility.

Referring to fig. 3, the first adhesive layer 112 is disposed between the first fabric layer 111 and the second fabric layer 113 for adhering them without glue leakage, and the interlayer adhesion between the first fabric layer 111 and the second fabric layer 113 should have an adhesive force of 1.5KN/m or more, and further 1.8KN/m or more, based on the adhesion of the first adhesive layer 112, so that the ink transfer medium 10 is prevented from being broken by radial stress during use. The first adhesive layer 112 may employ, for example, an anaerobic adhesive such as butyl acrylate and C2 to C10 alkyl esters, which are usually acrylic acids; epoxy resins, for example one-component resin adhesives, such as dicyandiamide (cyanoguanidine), or two-component systems using polyfunctional amines or polyfunctional acids as curing agents, or using cyanoacrylates; or a hot melt adhesive such as polyethylene, polyvinyl acetate, polyamide, hydrocarbon resin, resinous material, and wax, and may also be a pressure sensitive adhesive. The thickness of the first adhesive layer 112 is, for example, 0.1mm to 1mm, such as 0.13mm, 0.2mm, 0.3mm, 0.5mm, 0.7 mm.

Referring to fig. 3, in other embodiments, the first substrate layer 11 may include a first fabric layer 111, a first adhesive layer 112, a second fabric layer 113, a second adhesive layer 114, and a third fabric layer 115, so that a plurality of layers of the ink transfer medium 10 are formed by increasing the number of layers of the first substrate layer 11. The second adhesive layer 114 may, for example, be the same or different structure than the first adhesive layer 112. The third cloth layer 115 may have the same or different structure as the first cloth layer 111 and/or the second cloth layer 113, for example. In this case, in the first base material layer 11 within the above-described structural range, the thickness between the first, second, and third fabric layers 111, 113, and 115 may have a thickness of D, for example₁₁₁Greater than or equal to D₁₁₃Greater than or equal to D₁₁₅For example, the thickness may be 0.37mm, respectively; 0.39mm, 0.37 mm; 0.37mm, 0.35 mm; 0.39mm, 0.37mm, 0.35mm, etc., wherein the first cloth layer 111, the second cloth layer 113, and the third cloth layer 115 have a tensile strength of 50kgf/cm or more and a tensile elongation at break of 7.5% or less, thereby preventing the ink transfer medium 10 from being pressed during printingBreaks and ensures good flexibility.

Referring to fig. 2, the thickness of the first substrate layer 11 is, for example, 0.6 to 1.4mm, such as 0.84mm, 0.94mm, 1.21mm, and 1.33 mm. The first substrate layer 11 in this range can sufficiently ensure that the ink transfer medium 10 has the intended performance.

Referring next to fig. 2 and 4 to 6, the air cushion layer 12 is disposed on the first substrate layer 11, the air cushion layer 12 has a micro-porous structure, and further comprises micro-sphere capsules, specifically, the raw material components of the air cushion layer 12, such as the micro-spheres, rubber components and additives, are vulcanized at a certain temperature and in a plurality of temperature ranges to form a foamed micro-porous structure, the micro-pores are fully closed micro-pores with diameters of, for example, 0.005 mm to 0.03mm, such as 0.01mm and 0.013mm, the pores are uniform and complete, the average porosity is 70 to 80%, and the compressibility of 0.10 mm to 0.18mm, such as 0.20mm, 0.66mm and 0.1mm, so that the micro-pores absorb the printing pressure during the printing process, do not swell the surface of the ink transfer medium 10, cause dot deformation, and when the printing pressure is removed, the micro-pores are rapidly recovered, while the pressure during printing remains substantially constant, the printing speed can be up to 1.5 million prints of high speed printing, further 1.8 million prints or more, for example 2 million prints, based on the characteristics of the air bearing layer 12.

In some embodiments, the microspheres may be a polyurethane microsphere blowing agent, the polyurethane microspheres comprising a polyurethane shell and a gas encapsulated therein, forming tiny spherical plastic particles, which soften when heated and expand the gas within the shell, causing the expanded microspheres to increase in volume and become a 100% enclosure and return to their original volume after the pressure is released. The polyurethane microsphere foaming agent has a foaming temperature of, for example, 80-190 ℃ and a diameter of, for example, 0.7-1.4. mu.m, such as 0.8. mu.m, 1 μm. The microspheres may be formed from acrylonitrile or a copolymer of acrylonitrile, and further include isobutane, 2, 4-dimethylbutane, 2-methylpentane, 3-methylpentane, n-hexane, cyclohexane, heptane, isooctane, or any combination thereof in the raw material components of the microspheres, or other suitable polymeric microspheres, such as those prepared by emulsion polymerization, emulsified to obtain polymeric particles, which are then sieved and dried to obtain the microspheres, wherein the average particle diameter of the polymeric particles may be 0.02-0.05mm, such as 0.02-0.05 mm. Sample microspheres of similar average particle size were obtained by sieving, and the effect of particle size non-uniformity on expansion in use of the flexographic plate was limited.

In some embodiments, the rubber component may be, for example, acrylonitrile/butadiene rubber (NBR), neoprene (CR), fluoro rubber (FKM), Urethane Rubber (UR), ethylene propylene rubber (EPDM), butyl rubber (IIR), or the like.

In some embodiments, the adjuvants are, for example, vulcanizing agents, antioxidants, reinforcing agents, fillers, plasticizers, and the like. Such as carbon black, white carbon, silica, titanium dioxide, calcium carbonate, colored pigments, clays, and combinations thereof, and reinforcing agents such as zinc stearate and/or zinc oxide.

Referring back to fig. 2, the thickness of the air cushion layer 12 is, for example, 0.2-0.8mm, and further, for example, 0.3-0.6mm, such as 0.26mm, 0.35mm, 0.42mm, 0.56mm, 0.78 mm.

Referring to fig. 4 to 6, the penetration thickness of the air cushion layer 12 on the first substrate layer 11 is smaller than or equal to the thickness of the first substrate layer 11, which is specifically the penetration of the glue layer slurry of the air cushion layer 12 on the other side of the first substrate layer 11, and is further smaller than the thickness of the first substrate layer 11, for example, the penetration thickness of the air cushion layer 12 on the second fabric layer 113 may be smaller than or equal to the thickness of the second fabric layer 113, specifically, for example, 0mm, 0.06mm, 0.1mm, 0.2mm, and 0.35 mm. When the penetration thickness of the air cushion layer 12 on the first substrate layer 11 is smaller than or equal to the thickness of the first substrate layer 11, and the first substrate layer 11 is taken as the innermost layer, the surface of the first substrate layer 11 is prevented from being uneven due to the penetration of the air cushion layer 12, so that the printing quality is not ideal.

Referring back to fig. 2, the air cushion layer 12 is located between the first substrate layer 11 and the second substrate layer 13, and the interlayer adhesion between the first substrate layer 11 and the second substrate layer 13 should have an adhesive force of 1.5KN/m or more, and further 1.8KN/m or more based on the air cushion layer 12, so that the ink transfer medium 10 is prevented from being broken due to radial stress during use. Specifically, the air bearing layer 12 within the above range can solve the balance between the adhesion and the slurry bleeding, and further, for example, the use of a raw material component containing an organic solvent can be avoided during the production and the application of the air bearing layer 12.

Referring to fig. 2, the second substrate layer 13 is disposed on the air cushion layer 12, and the second substrate layer 13 may include a multi-layer structure formed by a cloth and an adhesive, such as a cloth layer, which has the same structure as the first substrate 11, such as a long-staple cotton cloth, a hemp cloth, a non-woven fabric, such as a long-staple cotton cloth, and further has a thickness of 0.3-0.5mm, such as 0.35mm, 0.37mm, 0.39mm, 0.4mm, and a cloth seam (i.e. a seam between the warp and the weft) of 0.03 mm-0.8 mm, such as 0.04mm, 0.06mm, 0.069mm, and 250 g/m/180-²Gram weight of (2), e.g. 200g/m²、220g/m²Has a radial strength of 1800 or more, further 1900 or more, for example 1950, 2000, 2200 and, more importantly, the third substrate layer 13 has a radial elongation of 5% or less, further 4.8% or less, for example 4.5%, 4%, and has a constant elongation of 1.6% or less, further 1.5% or less, for example 1.4%, 1.3%. The third base material layer 13 within the above range can be free from elongation, breaking, and deformation, has good affinity with the air cushion layer 12 and the surface adhesive layer 14, is easily adhered to the surface adhesive layer, and is less likely to fall off, and can suppress deformation of the ink transfer medium 10 and improve the tensile strength thereof.

Referring next to fig. 2 and 7-8, the size layer 14 is disposed on the second substrate layer 13, and the size layer 14 is the outermost layer of the ink transfer medium 10, directly contacting the ink, and transferring it to the substrate 103. The surface of the topcoat layer 14, that is, the surface of the ink transfer medium 10, in some embodiments, from the viewpoint of obtaining the ink transfer medium 10 with hardness, wear resistance, oil erosion resistance, chemical corrosion resistance, and the like, the surface roughness Ra of the topcoat layer 14 is 0.8 to 1.4um, such as 0.9um, 1.0um, 1.3um, the section roughness, such as Rz, is 3 to 5um, the variation of the unevenness is less than or equal to 0.03mm, further, such as less than or equal to 0.02mm, and the shore a hardness is, for example, 70 ° to 85 °, such as 76 °, 78 °, 81 °.

In some embodiments, the raw material components of the surface adhesive layer 14 include a first nitrile rubber and/or a second nitrile rubber, a nanomaterial, zinc chloride, stearic acid, a plasticizer, an anti-aging agent and/or an anti-aging agent white carbon black and/or light calcium carbonate, a first colorant, a second colorant, sulfur, a first accelerator, a second accelerator, and a scorch retarder, and the surface adhesive layer 14 can be obtained by mixing and vulcanizing the raw material components.

The rubber and the nano material form a nano structure, and the nano structure improves the hardness and the wear resistance of the surface rubber layer 14, increases the elasticity, the overall strength and the fatigue resistance, and meets the requirement of high-speed printing. In some embodiments, the nanomaterial comprises a combination of one or more of graphene, carbon nanotubes, and nanosilica. For example, a combination of graphene and nanosilica, for example, a combination of carbon nanotubes and nanosilica, for example, including a combination of graphene, carbon nanotubes and nanosilica. In the invention, the nano silicon dioxide is amorphous white powder, is nontoxic, tasteless and pollution-free, and has a spherical microstructure and a flocculent and reticular quasi-particle structure. The graphene has good resistance to ink penetration, and can enhance the performances of ink erosion resistance and chemical corrosion resistance. The carbon nanotube has a special structure, the radial dimension is nanometer magnitude, the axial dimension is micrometer magnitude, and both ends of the tube are basically sealed. The carbon nanotube mainly comprises several layers to tens of layers of coaxial circular tubes formed by carbon atoms arranged in a hexagon, wherein a fixed distance is kept between the layers, the distance is about 0.34nm, and the diameter is generally 2-20 nm. When the nano material is the combination of graphene and nano silicon dioxide, the network structure of the nano silicon dioxide is matched with the honeycomb structure of the graphene, so that the hardness, the wear resistance and other properties of the surface adhesive layer 14 are further enhanced. When the nano material is a combination of the carbon nano tube and the nano silicon dioxide, the nano silicon dioxide can be adsorbed on the tube wall of the carbon nano tube, and the hardness, the wear resistance and other properties of the system can be further enhanced, so that the surface adhesive layer 14 has a good ink transfer effect.

Referring to fig. 2, the thickness of the surface adhesive layer 14 is, for example, 0.15 to 0.5mm, such as 0.15mm, 0.23mm, 0.33mm, and 0.45mm, when the surface adhesive layer 14 provided by the present invention is formed on the second substrate layer 13, the surface adhesive layer 14 and the second substrate 13 do not penetrate into each other, that is, the surface roughness Ra of the surface adhesive layer 14 is 0.8 to 1.4nm, and the variation of the unevenness is less than or equal to 0.03mm, so as to avoid the texture structure of the second substrate 13 from being transferred to the printing material 103, such that the printing effect is not ideal.

Referring to fig. 9, the present invention also provides a method of making an ink transfer medium 10 as described above, including but not limited to,

s1, providing a first substrate layer 11, an air cushion layer 12, a second substrate layer 13 and a surface adhesive layer 14;

s2, laminating the air cushion layer 12 on the first substrate layer 11;

s3, laminating the second substrate layer 13 on the air cushion layer 12, and performing a first-stage vulcanization;

and S4, laminating the surface adhesive layer 14 on the second substrate layer 13, and carrying out second-stage vulcanization.

In the above process, in the ink transfer medium 10, the penetration thickness of the air cushion layer 12 on the first substrate layer 11 is less than or equal to the thickness on the first substrate layer 11, the interlayer adhesion between the first substrate layer 11 and the second substrate layer 13 is greater than or equal to 1.5KN/m, and the residual amount of the organic solvent of the ink transfer medium 10 is less than or equal to 0.1 PPM.

Referring to fig. 10, the method for preparing the ink transfer medium 10 may be implemented by, for example, a process of a manufacturing apparatus C10, and specifically, in some embodiments, the manufacturing apparatus C10 includes a rubber mixing apparatus C100, a rubber filtering apparatus C200, a rolling apparatus C300, a splicing apparatus C400, a first vulcanizing apparatus C500, a second vulcanizing apparatus C600, and a grinding apparatus C700, and the ink transfer medium 10 performs a rubber mixing process, a rubber filtering process, a first pressing sheet, a first sulfur splicing process, a second pressing sheet, a second sulfur splicing process, and a grinding process on the ink transfer medium 10 through a manufacturing apparatus C10, so as to complete the method for preparing the ink transfer medium 10.

Referring back to fig. 9, in step S1, the first substrate layer 11, the air cushion layer 12, the second substrate layer 13, and the surface adhesive layer 14 are provided, more specifically, their respective raw material components are provided, and further, their respective raw material components are formed into independent sheets after being respectively laminated, and then step S2 is performed.

In some embodiments, the first substrate layer 11 includes a first fabric layer 111, a first adhesive layer 112, an epoxy resin curing agent, and a second fabric layer 113. Specifically, a long-staple cotton cloth is cut and pressed to form a cloth material as a first cloth layer 111; mixing epoxy resin curing agent (organic solvent is avoided), and pressing to form an adhesive sheet as the first adhesive layer 112; the method comprises cutting long-staple cotton cloth, pressing to form a cloth material as a second cloth layer 113, and then sequentially pressing the first adhesive layer 112 and the second cloth layer 113 on the first cloth layer 111, wherein the pressing process can be implemented by rolling with a rolling device C300, for example.

In some embodiments, as shown in fig. 11, the calendering apparatus C300 is, for example, a three-roll calender, and includes a frame C301, a first calendering roll C310, a second calendering roll C320, and a third calendering roll C330, the first calendering roll C310 is disposed on one side of the second calendering roll C320, the third calendering roll C330 is disposed on the other side of the second calendering roll C320, and they are respectively driven by a calendering driving mechanism to rotate, when a calendering operation is performed, the rotation directions of the first calendering roll C310, the second calendering roll C320, and the third calendering roll C330 are respectively used, in the ink transfer medium 10, for example, a raw material component of the first adhesive layer 112 is firstly sent to the first calendering roll C310, the second calendering roll C320 for a first calendering, and the first adhesive layer 112 finally calendered into a sheet is output from a discharge area above the third calendering roll C330. Further, a spacing adjusting device for adjusting the spacing between adjacent calendering rolls, a lifting device for controlling the first calendering roll C310, the second calendering roll C320 and the third calendering roll C330, and a temperature control device are arranged on the frame C301 to control the pressing parameters of the calendering equipment C300 in the calendering process, specifically, for example, the temperature is 100-170 ℃, such as 150 ℃, 162 ℃ and 165 ℃; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h. Further, the lamination may be performed more times according to the structure of the first base material layer 11.

Referring to fig. 10 and 11, in some embodiments, for example, the raw material components of the air cushion layer 12, such as microspheres, rubber components and additives, may be respectively mixed and filtered (without using organic solvent) by, for example, a mixing device C100 such as a pressurized kneader, etc., a rubber filtering device C200, and then the processed raw material components may be laminated to form an air cushion sheet as the air cushion layer 12, for example, the laminating process may be performed by calendering by using a calendering device C300, and the parameters in the laminating process are, for example, 100-; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h.

In some embodiments, for example, the second substrate layer 13, such as a long-staple cotton cloth, may be cut and pressed to form a cloth material as the second substrate layer 13.

Referring to fig. 10 and 11, in some embodiments, for example, raw material components of the dough cover layer 14, such as first nitrile rubber and/or second nitrile rubber, nano-material, zinc chloride, stearic acid, plasticizer, antioxidant and/or antioxidant white carbon black and/or light calcium carbonate, first colorant, second colorant, sulfur, first accelerator, second accelerator, and antiscorching agent, may be respectively mixed and filtered (without using organic solvent) by, for example, a mixing device C100 such as a pressurized kneader or the like, and a rubber filtering device C200, and then the processed raw material components may be pressed to form a dough cover sheet as the dough cover layer 14, wherein the pressing process may be performed by, for example, a rolling device C300, and the parameters in the pressing process are, for example, the temperature is 100-; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h. .

Referring to fig. 9 to 11, in step S2, the air cushion layer 12 is laminated on the first substrate layer 11, specifically, the air cushion layer 12 and the first substrate layer 11 are calendered and spliced by a calendering device C300, at this time, a thickness of the air cushion layer 12 penetrating into the first substrate layer 11 during the laminating process is smaller than or equal to a thickness of the first substrate layer 11, for example, the first substrate layer 11 may have a cloth seam of 0.03mm to 0.8mm, further 0.05mm to 0.6mm, for example, 0.1mm, and the air cushion layer 12 penetrates through the cloth seam during the laminating process, so that the thickness of the air cushion layer 12 penetrating into the first substrate layer 11 is smaller than or equal to the thickness of the first substrate layer 11. The parameters of the rolling and splicing of the rolling equipment C300 are, for example, 100-170 ℃, such as 150 ℃, 162 ℃ and 165 ℃; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h. Step S3 is then performed.

Referring to fig. 9 to 11, in the step S3, the second substrate layer 13 is laminated on the air cushion layer 12, more specifically, the second substrate layer 13 is laminated on the other surface of the air cushion layer 12 to which the first substrate 11 is attached, and in this case, the second substrate layer 13 may have a seam of 0.02mm to 0.7mm, and further, may have a seam of 0.03mm to 0.7mm, for example, 0.06mm, 0.08 mm. The calendering and splicing process can be realized by calendering the calendering equipment C300 and the splicing equipment C400, and the parameters in the laminating process of the calendering equipment C300 are, for example, the temperature of 100-170 ℃, such as 150 ℃, 162 ℃ and 165 ℃; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h.

Referring to fig. 9 to 11, in step S3, a first stage of vulcanization is performed, and further, the vulcanization is performed in an environment of 0 to 0.1kg, such as 0kg, 0.01kg, so as to normally foam the microspheres in the air cushion layer 12, ensure the integrity and uniformity of the cells without deformation, and thus have a desirable compression performance. Further, the first vulcanizing apparatus C500 is used to perform staged (i.e., at different temperatures) vulcanization, for example, by setting different temperatures for a plurality of, e.g., 8, 16, hot rolls in a continuous vulcanization process, to ensure uniform and compact microsphere foaming and a desired bubble diameter. The process then proceeds to step S4.

Referring to fig. 9 to 11, in the step S4, the surface adhesive layer 14 is laminated on the second substrate layer 13, more specifically, the surface adhesive layer 14 is laminated on the other surface of the second substrate 13 with the first substrate layer 11 and the air cushion layer 12 laminated thereon by rolling, at this time, the laminating process can be achieved by rolling with a rolling device C300 and a laminating device C400, for example, the temperature in the laminating process of the rolling device C300 is 100-200 ℃, for example, 100-170 ℃, for example, 150 ℃, 162 ℃ and 165 ℃; a pressure of 5 to 12MPa, for example, 5.5MPa, 8.5MPa, 10 MPa; the roller spacing is 0.05-5mm, e.g. 0.06mm, 0.08mm, 1mm, 3mm, 3.5 mm; the calendering rate is from 5 to 15m/h, for example 6m/h, 8m/h, 12 m/h. .

Referring to fig. 9 to 11, in the step S4, a second stage of vulcanization, i.e., a bulk vulcanization, is performed, and the vulcanization is further performed under a light pressure environment, for example, under an environment of 0.5 to 3kg, for example, 1kg, 1.5kg, so that the air cushion layer 12 with a cellular structure is not damaged due to an excessive pressure. The ink transfer medium 10 can be obtained by the above process using the second vulcanizing device C600 for vulcanization.

Referring next to fig. 9 and 10, in some embodiments, the step S5 of polishing the surface of the ink transfer medium 10 may further include polishing the surface of the adhesive cover 14, for example, by using a polishing device C700, such as a roller leather polisher, a stainless steel plate polisher, a belt wood veneer polisher, etc., and controlling the surface roughness, thickness and unevenness of the ink transfer medium 10 within the above ranges.

In accordance with the present invention, the use of organic solvents is avoided during the preparation of the ink transfer medium 10 such that the residual organic solvent content of the ink transfer medium 10 is less than or equal to 0.1 PPM.

Examples of the invention

The present invention will be described in more detail below with reference to examples and comparative examples.

To provide the ink transfer medium 10, 8 examples and 2 comparative examples were prepared according to the parameters in table 1 below.

TABLE 1 structural parameters of the layers of the ink transfer media

As shown in table 2, the air cushion layer 12 was laminated on the first base material layer 11 in examples 1 to 8 by a calendaring apparatus C300, and the air cushion layer 12 was vulcanized by a vulcanizing machine.

Meanwhile, as shown in table 3, the air cushion layer 12 and the surface adhesive layer 14 were formed by coating the first base material layer 11 of comparative examples 1 to 2 on the respective layers by a coater, and the air cushion layer 12 and the surface adhesive layer 14 were vulcanized by a vulcanizer.

TABLE 2 calendering and curing parameters for ink transfer media

TABLE 3 coating parameters and curing parameters for ink transfer media

Evaluation of

Each evaluation item of the ink transfer media 10 prepared in examples 1 to 8 and comparative examples 1 to 2 was measured as shown in Table 3, and as shown in FIG. 12 and FIG. 13.

Specifically, fig. 12 shows a microscope representation of a coating-formed ink transfer media 10 in which bleed is severe and the cells are incomplete, as compared to a calendered formed ink transfer media 10 of the present invention (fig. 5-6). Fig. 13 shows a test chart of the unevenness of the ink transfer medium 10 provided by the present invention, which are all in the range of 0.03 mm.

TABLE 4 evaluation of ink transfer media 10

Therefore, the present invention provides an ink transfer medium 10, a multi-layer structure of the ink transfer medium 10 is formed by using a calendaring process, an infiltration thickness of the air cushion layer 12 in the ink transfer medium 10 on the first substrate layer 11 is less than or equal to a thickness on the first substrate layer 11, an interlayer adhesion between the first substrate layer 11 and the second substrate layer 13 is greater than or equal to 1.5KN/m, and an infiltration residual amount of the organic solvent of the ink transfer medium 10 is less than or equal to 0.1PPM, such that a problem of impregnation process is avoided, a qualification rate of a product is improved, a problem of resource waste and an environmental pollution is avoided, a working environment is also improved, and the ink transfer medium 10 can be widely applied to industrial production.

While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.