阅读说明：本技术 一种防水防油无纺布及其制作工艺 (Waterproof and oilproof non-woven fabric and manufacturing process thereof ) 是由 陈解忧 黄冠儒 张洛泓 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种防水防油无纺布及其制作工艺,所述防水防油无纺布由包括以下重量份的原料制成：聚丙烯65～75份、马来酸酐接枝乙烯-辛烯共聚物16～22份、PP-g-AA接枝共聚物8～13份、氨基改性聚硅氧烷乳液2～4份、聚偏氟乙烯-六氟丙烯共聚物5～8份、聚丙烯酸含氟酯4～7份、填料9～15份。本发明的防水防油无纺布,防水防油效果好,且防水防油效果持久,事后与溶剂接触或洗涤或与他物磨擦也不容易失去防水防油性能,此外,还具有良好的弹性和柔软度,对皮肤无刺激性,穿着舒适度高。(The invention discloses a waterproof and oilproof non-woven fabric and a manufacturing process thereof, wherein the waterproof and oilproof non-woven fabric is prepared from the following raw materials in parts by weight: 65-75 parts of polypropylene, 16-22 parts of maleic anhydride grafted ethylene-octene copolymer, 8-13 parts of PP-g-AA grafted copolymer, 2-4 parts of amino modified polysiloxane emulsion, 5-8 parts of polyvinylidene fluoride-hexafluoropropylene copolymer, 4-7 parts of polyacrylic acid fluorine-containing ester and 9-15 parts of filler. The waterproof and oilproof non-woven fabric has good waterproof and oilproof effects, is durable, is not easy to lose the waterproof and oilproof performance after contacting with a solvent or washing or rubbing with other objects, and has good elasticity and softness, no irritation to skin and high wearing comfort.)

1. The waterproof and oilproof non-woven fabric is characterized by being prepared from the following raw materials in parts by weight: 65-75 parts of polypropylene, 16-22 parts of maleic anhydride grafted ethylene-octene copolymer, 8-13 parts of PP-g-AA grafted copolymer, 2-4 parts of amino modified polysiloxane emulsion, 5-8 parts of polyvinylidene fluoride-hexafluoropropylene copolymer, 4-7 parts of polyacrylic acid fluorine-containing ester and 9-15 parts of filler.

2. The water-proof and oil-proof non-woven fabric according to claim 1, wherein the water-proof and oil-proof non-woven fabric is prepared from the following raw materials in parts by weight: 70 parts of polypropylene, 19.3 parts of maleic anhydride grafted ethylene-octene copolymer, 10.5 parts of PP-g-AA grafted copolymer, 3.4 parts of amino modified polysiloxane emulsion, 6.7 parts of polyvinylidene fluoride-hexafluoropropylene copolymer, 5.2 parts of polyacrylic acid fluorine-containing ester and 12 parts of filler.

3. The waterproof and oilproof non-woven fabric according to claim 1, wherein the melting point of the polypropylene is 160-170 ℃, and the melt index is 12-16 g/10 min.

4. The water and oil repellent nonwoven fabric according to claim 1, wherein the maleic anhydride graft ratio of the maleic anhydride grafted ethylene-octene copolymer is 0.9 to 1.2%.

5. The water-proof and oil-proof non-woven fabric according to claim 1, wherein the acrylic acid grafting rate of the PP-g-AA graft copolymer is 1.6-2.3%.

6. The water and oil resistant nonwoven fabric according to claim 1, wherein the filler is nano calcium carbonate.

7. A process for manufacturing the water and oil repellent nonwoven fabric according to any one of claims 1 to 7, comprising the steps of:

A. weighing the following raw materials in parts by weight: polypropylene, maleic anhydride grafted ethylene-octene copolymer, PP-g-AA grafted copolymer, amino modified polysiloxane emulsion, polyvinylidene fluoride-hexafluoropropylene copolymer, polyacrylic acid fluorine-containing ester and filler;

B. feeding the raw materials into a double-screw extruder to be melted into a mixed melt;

C. the mixed melt enters a composite spinning machine, is sprayed out from a spinneret plate after being distributed, forms strand silk, and then is cooled by blowing, stretched and wound to obtain the polypropylene composite fiber; the fineness of the polypropylene composite fiber is 2-5 dtex;

D. and (3) carding the polypropylene composite fibers into a net, then carrying out spunlace reinforcement and drying to obtain the waterproof and oilproof non-woven fabric.

8. The manufacturing process of the waterproof and oilproof non-woven fabric according to claim 7, wherein in the step B, the heating section of the twin-screw extruder is 6 sections, and the heating temperature is 222-230 ℃, 236-242 ℃, 250-255 ℃, 260-265 ℃, 268-272 ℃ and 272-275 ℃ in sequence.

9. The manufacturing process of the waterproof and oilproof non-woven fabric according to claim 7, characterized in that in the step D, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of a carding machine is 700-750 m/min, the rotating speed of a working roll is 50-60 m/min, and the rotating speed of a stripping roll is 65-75 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 5-9; the pressure range of the plurality of the water stabs is 30-40 bar.

Technical Field

The invention relates to the technical field of non-woven fabrics, in particular to a waterproof and oilproof non-woven fabric and a manufacturing process thereof.

Background

The fiber for producing the non-woven fabric is mainly polypropylene (PP) and Polyester (PET). In addition, there are Polyamide (PA), viscose, acrylic, polyethylene (HDPE), polyvinyl chloride (PVC). The non-woven fabric is classified into a disposable type and a durable type according to application requirements.

The production process comprises the following steps:

1. water-jetting non-woven fabric: the spunlace process is to spray high-pressure fine water flow onto one or more layers of fiber webs to entangle the fibers with each other, so that the fiber webs are reinforced and have certain strength.

2. Heat sealing the non-woven fabric: the thermal bonding non-woven fabric is formed by adding fibrous or powdery hot melt bonding reinforcing materials into a fiber web, and heating, melting, cooling and reinforcing the fiber web into a fabric.

3. Pulp air-laid nonwoven fabric: airlaid nonwoven fabrics may also be referred to as airlaid paper and dry papermaking nonwoven fabrics. It adopts the air-laid technology to open the wood pulp fiber board into single fiber state, then uses the air-laid method to make the fiber agglutinate on the net-forming curtain, then the net is consolidated into cloth.

4. Wet non-woven fabric: the wet-process non-woven fabric is made up through opening the raw fibre material in water medium to obtain single fibre, mixing different fibre materials to obtain fibre suspension pulp, delivering the suspension pulp to net-forming mechanism, and wet-forming and solidifying.

5. Spun-bonded nonwoven fabric: spunbond nonwoven fabrics are nonwoven fabrics formed by extruding and drawing a polymer to form continuous filaments, laying the filaments into a web, and then converting the web into a nonwoven fabric by autogenous bonding, thermal bonding, chemical bonding, or mechanical consolidation.

6. Melt-blown nonwoven fabric: the process of melt-blown non-woven fabric comprises the following steps: polymer feeding, melt extrusion, fiber formation, fiber cooling, web forming and cloth reinforcement.

7. Needling the non-woven fabric: the needle-punched non-woven fabric is one of dry non-woven fabrics, and the needle-punched non-woven fabric is formed by reinforcing a fluffy fiber web into a fabric by utilizing the piercing effect of a needle.

8. Stitching and knitting non-woven fabrics: stitchbonded nonwovens are one type of dry-laid nonwovens that are made by consolidating webs, layers of yarn, nonwoven materials (e.g., plastic sheets, plastic foils, etc.), or combinations thereof, with a warp-knitted loop structure.

9. Hydrophilic non-woven fabric: the method is mainly used for producing medical and sanitary materials so as to obtain better hand feeling and prevent the skin from being scratched. Like sanitary napkins and sanitary pads, the hydrophilic function of hydrophilic nonwoven fabrics is utilized.

Polypropylene fibers can be classified into long fibers, short fibers, spunbonded nonwoven fabrics, meltblown nonwoven fabrics, and the like. The polypropylene long fiber can be divided into common long fiber and fine denier long fiber (filament number is less than or equal to 2.2dtex), and can be used for producing long fiber products for clothing, decoration and part of industries. The polypropylene fine denier filament has good luster, soft hand feeling, good drapability and small density, is suitable for the knitting industry, and is an ideal material for manufacturing high-grade sportswear, T-shirts and the like when being interwoven with cotton, viscose, real silk, spandex and the like into products such as cotton covered polypropylene, silk covered polypropylene and the like.

However, the water-and oil-repellent nonwoven fabrics currently used have the following problems:

1. the existing preparation method of the water-proof and oil-proof non-woven fabric is to manufacture non-woven fabric without functionality firstly, and then immerse the non-woven fabric into a three-proofing finishing agent for impregnation so as to prepare the non-woven fabric with water-proof and oil-proof performances, but although the method has various polymers, the obtained water-proof and oil-proof non-woven fabric has poor water-proof and oil-proof performances, and the water-proof and oil-proof performances (functions) are temporary, so that the water-proof and oil-proof performances are easily lost after the contact with a solvent or the washing or the friction;

2. the elasticity of waterproof grease proofing non-woven fabrics is relatively poor, and the compliance is lower, has irritability slightly to skin, and the comfort level is relatively poor.

Disclosure of Invention

Based on the above situation, the present invention is directed to a water-proof and oil-proof nonwoven fabric and a manufacturing process thereof, which can effectively solve the above problems.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the waterproof and oilproof non-woven fabric is prepared from the following raw materials in parts by weight: 65-75 parts of polypropylene, 16-22 parts of maleic anhydride grafted ethylene-octene copolymer (the flexibility of polypropylene composite fiber (elastomer) is improved by introducing the maleic anhydride grafted ethylene-octene copolymer with a proper proportion, so that the mechanical property of the finally prepared non-woven fabric is improved), 8-13 parts of PP-g-AA grafted copolymer (AA is acrylic acid, the compatibility of the polypropylene and the maleic anhydride grafted ethylene-octene copolymer is improved by introducing the PP-g-AA grafted copolymer with a proper proportion, the mechanical property is improved), 2-4 parts of amino modified polysiloxane emulsion (the amino modified polysiloxane emulsion is mutually matched with other components by introducing the amino modified polysiloxane emulsion with a proper proportion, a good synergistic effect is achieved, and the amino modified polysiloxane emulsion is mainly used for improving the flexibility of products), 5-8 parts of polyvinylidene fluoride-hexafluoropropylene copolymer, 4-7 parts of polyacrylic acid fluorine-containing ester and 9-15 parts of filler.

Preferably, the waterproof and oilproof non-woven fabric is prepared from the following raw materials in parts by weight: 70 parts of polypropylene, 19.3 parts of maleic anhydride grafted ethylene-octene copolymer, 10.5 parts of PP-g-AA grafted copolymer, 3.4 parts of amino modified polysiloxane emulsion, 6.7 parts of polyvinylidene fluoride-hexafluoropropylene copolymer, 5.2 parts of polyacrylic acid fluorine-containing ester and 12 parts of filler.

Preferably, the melting point of the polypropylene is 160-170 ℃, and the melt index is 12-16 g/10 min.

Preferably, the maleic anhydride grafting ratio of the maleic anhydride grafted ethylene-octene copolymer is 0.9-1.2%.

Preferably, the acrylic acid grafting rate of the PP-g-AA graft copolymer is 1.6-2.3%.

Preferably, the filler is nano calcium carbonate.

The invention also provides a manufacturing process of the waterproof and oilproof non-woven fabric, which comprises the following steps:

A. weighing the following raw materials in parts by weight: polypropylene, maleic anhydride grafted ethylene-octene copolymer, PP-g-AA grafted copolymer, amino modified polysiloxane emulsion, polyvinylidene fluoride-hexafluoropropylene copolymer, polyacrylic acid fluorine-containing ester and filler;

B. feeding the raw materials into a double-screw extruder to be melted into a mixed melt;

C. the mixed melt enters a composite spinning machine, is sprayed out from a spinneret plate after being distributed, forms strand silk, and then is cooled by blowing, stretched and wound to obtain the polypropylene composite fiber; the fineness of the polypropylene composite fiber is 2-5 dtex;

D. carding the polypropylene composite fibers into a net, then carrying out spunlace reinforcement and drying to obtain the waterproof and oilproof non-woven fabric;

preferably, in the step B, the heating section of the double-screw extruder is 6 sections, and the heating temperature is 222-230 ℃, 236-242 ℃, 250-255 ℃, 260-265 ℃, 268-272 ℃ and 272-275 ℃ in sequence.

Preferably, in the step D, when the mixed fibers are carded into a web, the rotating speed of a main cylinder of the carding machine is 700-750 m/min, the rotating speed of a working roller is 50-60 m/min, and the rotating speed of a stripping roller is 65-75 m/min; the number of the spunlace heads used for spunlacing and reinforcing the mixed fiber web is 5-9; the pressure range of the plurality of the water stabs is 30-40 bar.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the waterproof and oilproof non-woven fabric is prepared by selecting raw materials, optimizing the content of each raw material, selecting polypropylene, maleic anhydride grafted ethylene-octene copolymer, PP-g-AA grafted copolymer, amino modified polysiloxane emulsion, polyvinylidene fluoride-hexafluoropropylene copolymer, polyacrylic acid fluorine-containing ester and filler in proper proportion, fully playing respective advantages, complementing each other, promoting each other, improving the quality stability of products, having good waterproof and oilproof effects without being soaked in a three-proofing finishing agent, having lasting waterproof and oilproof effects, not easily losing the waterproof and oilproof performances after contacting with a solvent or washing or rubbing with other objects, and having good elasticity (mainly adding the maleic anhydride grafted ethylene-octene copolymer) and softness (mainly adding the amino modified polysiloxane emulsion), has no irritation to skin and high wearing comfort.

The waterproof and oilproof non-woven fabric disclosed by the invention is good in waterproof and oilproof effects due to the fact that 5-8 parts of polyvinylidene fluoride-hexafluoropropylene copolymer and polyacrylic acid fluorine-containing ester are added in a proper proportion and are matched with other components, the waterproof and oilproof non-woven fabric is uniformly dispersed in a base material (polypropylene, maleic anhydride grafted ethylene-octene copolymer, PP-g-AA graft copolymerization and the like), the bonding strength is high, the waterproof and oilproof effects are lasting, and the waterproof and oilproof performance cannot be easily lost after the waterproof and oilproof non-woven fabric is contacted with a solvent or washed or rubbed with other objects.

The invention has simple manufacturing process and simple and convenient operation, and saves manpower and equipment cost.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.

The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.