CN111719317B - Environment-friendly styrene thermoplastic elastomer artificial leather and preparation method thereof - Google Patents

Environment-friendly styrene thermoplastic elastomer artificial leather and preparation method thereof Download PDF

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Publication number
CN111719317B
CN111719317B CN202010531407.2A CN202010531407A CN111719317B CN 111719317 B CN111719317 B CN 111719317B CN 202010531407 A CN202010531407 A CN 202010531407A CN 111719317 B CN111719317 B CN 111719317B
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thermoplastic elastomer
layer
styrene thermoplastic
artificial leather
double
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CN111719317A (en
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陈大魁
陈健
杨青
曹渊源
黄旭生
肖丽伟
孙卫东
朱卫鹏
周慧源
周凯祥
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Zhejiang Zhongcheng Packing Material Co ltd
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Zhejiang Zhongcheng Packing Material Co ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/045—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with polyolefin or polystyrene (co-)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0009—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using knitted fabrics
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0025—Rubber threads; Elastomeric fibres; Stretchable, bulked or crimped fibres; Retractable, crimpable fibres; Shrinking or stretching of fibres during manufacture; Obliquely threaded fabrics
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0036—Polyester fibres
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D06N3/005—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by blowing or swelling agent
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D06N3/0054—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by mechanical perforations
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
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    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
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    • B32B2307/00—Properties of the layers or laminate
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    • B32—LAYERED PRODUCTS
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Abstract

The invention relates to an environment-friendly styrene thermoplastic elastomer artificial leather and a preparation method thereof, wherein the thermoplastic elastomer artificial leather comprises a resin layer and a base cloth layer, the resin layer comprises a styrene thermoplastic elastomer bottom layer, a styrene thermoplastic elastomer middle layer and a styrene thermoplastic elastomer surface layer, and the styrene thermoplastic elastomer bottom layer is connected with the base cloth layer; the resin layer and the base cloth layer are formed at one time by a multi-layer coextrusion casting compounding device. The resin layer is firmly bonded with the base cloth layer, and no tackifier is required to be added, so that the adhesive is environment-friendly; the preparation method is simple and efficient, and can realize continuous production.

Description

Environment-friendly styrene thermoplastic elastomer artificial leather and preparation method thereof
Technical Field
The invention belongs to the technical field of artificial leather preparation, and particularly relates to environment-friendly styrene thermoplastic elastomer artificial leather and a preparation method thereof.
Background
In daily life, leather products are deeply favored by consumers, and basketball, luggage, automotive trim, shoes, clothing and the like manufactured by the leather products have a large share in the market. Currently, leather products on the market mainly comprise natural leather, PVC leather, PU leather and the like. As is known, natural dermis is a limited resource, expensive, tedious and environmentally polluting process, and has not met the ever increasing demands of people. PVC artificial leather is wide in application range and low in price, but the common PVC artificial leather is stiff in hand feeling, poor in cold resistance, low in surface strength, poor in softness and air permeability, and most importantly, the PVC artificial leather can release toxic substances such as dioxin and the like in the production and use processes, and the migration and volatilization of plasticizer additives and the like seriously affect the health of people. Today, where people are increasingly concerned about environmental protection and health, PVC artificial leather is gradually being eliminated. The PU leather has the defects of peculiar smell, easy stripping of surface coating, complex processing technology, non-environmental protection in the processing process (involving use, emission and recovery of toxic substances such as heavy metal, formaldehyde, chlorophenol, dimethylformamide and the like), and the like. Along with the continuous improvement of the international environmental protection requirements, the development of artificial leather materials with high performance, weather resistance and good touch feeling has been a trend.
TPE (thermoplastic elastomer) material is a material with high elasticity, high strength and high rebound resilience of rubber and has the characteristic of injection molding. Among TPE materials, TPS, that is, styrenic thermoplastic elastomer materials are a large class, but hydrogenated styrene-butadiene-styrene block copolymers (SEBS) and hydrogenated styrene-isoprene-styrene block copolymers (SEPS) have excellent aging resistance due to the fact that they do not contain unsaturated double bonds after hydrogenation, and thus have plasticity, high elasticity, and can be processed and used without vulcanization, and leftover materials can be reused, and are green and environment-friendly.
Different artificial leathers and methods for producing artificial leathers are disclosed in the prior art. For example, chinese patent CN111051605a discloses an artificial leather and a manufacturing method thereof, wherein a multi-layer foamed polyvinyl chloride-based artificial leather is prepared from polyvinyl chloride resin, plasticizer, curing agent, surface treating agent, and the like. Although the various service performances of the prepared artificial leather reach the standard, the artificial leather has poor environmental protection performance due to various additives such as plasticizer and the like.
Chinese patent CN107163545a discloses an environment-friendly artificial leather, which comprises a base layer and a decorative layer on the surface of the base layer, wherein an adhesive layer is arranged between the base layer and the decorative layer; the base layer comprises ECO rubber, polyurethane resin, solvent, flame retardant, anti-aging agent, dispersing agent, cross-linking agent, foaming agent and the like. The used additives are various and have high cost.
Chinese patent CN108001024a discloses a thermoplastic elastomer artificial leather and a preparation method thereof, wherein the artificial leather resin layer is made from polyurethane material, thermoplastic elastomer, unsaturated grafting monomer, thickener and defoamer through melt grafting or copolymerization, and the preparation method comprises the steps of film preparation, attaching with base cloth, attaching with release paper, separating, rolling and the like. The preparation method has complicated steps, and is difficult to realize integrated molding and continuous production.
The Chinese patent CN109823014A discloses TPE artificial leather and a preparation method thereof, wherein the artificial leather comprises a base fabric, a TPE bottom layer and a TPE surface layer, the TPE bottom layer and the surface layer mainly comprise SEBS, ethylene-octene copolymer, EVA and the like, and the preparation method of the artificial leather mainly comprises the steps of mixing by an internal mixer, mixing by an open mill, thin-passing, extruding by an extruder, pressing by a four-roller calender, foaming in a vulcanizing machine and the like. The preparation method has complicated steps, and is difficult to realize integrated molding and continuous production.
Although these prior arts can produce various types of artificial leather, they have disadvantages in terms of environmental protection or continuous production. The artificial leather material is environment-friendly, can realize the high efficiency, integration and continuity of the preparation process, and is a future development direction.
Disclosure of Invention
In order to overcome the defects that the prior art is difficult to realize environmental protection and continuous production, the invention provides an environment-friendly styrene thermoplastic elastomer artificial leather and a preparation method thereof.
The invention adopts the technical scheme that:
an environment-friendly styrene thermoplastic elastomer (TPS) artificial leather comprising a resin layer and a base cloth layer, wherein the resin layer comprises a styrene thermoplastic elastomer bottom layer, a styrene thermoplastic elastomer middle layer and a styrene thermoplastic elastomer surface layer, and the styrene thermoplastic elastomer bottom layer is connected with the base cloth layer;
the styrene thermoplastic elastomer bottom layer consists of a polar thermoplastic elastomer;
the styrene thermoplastic elastomer intermediate layer is prepared from the following components in percentage by mass: 50-70% of styrene thermoplastic elastomer, 10-15% of polar styrene thermoplastic elastomer, 5-20% of filling oil, 5-20% of ethylene-octene copolymer, 5-10% of terpolymer polypropylene, 3-8% of talcum powder and 2-8% of calcium carbonate;
the surface layer of the styrene thermoplastic elastomer is prepared from the following components in percentage by mass: 60-75% of styrene thermoplastic elastomer, 5-10% of polar styrene thermoplastic elastomer, 5-15% of filling oil, 5-20% of ethylene-octene copolymer, 3-8% of talcum powder, 2-8% of polyamide, 2-8% of silicone and 2-5% of color master batch.
Preferably, the polar thermoplastic elastomer is any one or a combination of two or more of maleic anhydride grafted styrene thermoplastic elastomer, polyurethane-styrene thermoplastic elastomer block copolymer, and glycidyl methacrylate grafted styrene thermoplastic elastomer.
Preferably, the styrene thermoplastic elastomer is one or two of hydrogenated styrene-butadiene-styrene block copolymer (SEBS) and hydrogenated styrene-isoprene-styrene block copolymer (SEPS).
Preferably, the base cloth layer is one of non-woven fabric, elastic fabric, superfine fiber fabric, plain weave fabric, terylene knitted fabric, nylon fabric and spunlaced fabric.
Preferably, the filling oil is paraffin oil or naphthenic oil, and the kinematic viscosity at 40 ℃ is 50-600 mm 2 S, the flash point is 250-300 ℃; the melt index of the ethylene-octene copolymer is 4-6 g/10min (measured according to ASTM D1238-04 at 230 ℃/2.16 kg), the Shore hardness of the ternary copolymer is 75-90A (measured according to GB/T2411-2008), and the melt index is 4-7 g/10min (measured according to ASTM D1238-04 at 230 ℃/2.16 kg); the mesh number of the talcum powder and the calcium carbonate is 1500-3000 mesh.
The invention also provides a preparation method of the environment-friendly styrene thermoplastic elastomer artificial leather, which comprises the following steps:
(1) Preparing a styrene thermoplastic elastomer bottom layer material:
s101, drying the polarized thermoplastic elastomer;
s102, if more than two types of polar thermoplastic elastomers are used, uniformly mixing the dried polar thermoplastic elastomers in the high-speed mixer in parts by mass for later use;
(2) Preparing a styrenic thermoplastic elastomer interlayer material:
s201, adding the styrene thermoplastic elastomer and the filling oil into a high-speed mixer according to mass percent for physical mixing, and standing after mixing is completed;
s202, adding the material which is well kept stand in the S201, a polar styrene thermoplastic elastomer, an ethylene-octene copolymer, ternary copolymer polypropylene, talcum powder and calcium carbonate into a high-speed mixer together for physical mixing;
(3) Preparing a surface material of a styrene thermoplastic elastomer:
s301, adding the styrene thermoplastic elastomer and the filling oil into a high-speed mixer according to mass percent for physical mixing, and standing after mixing is completed;
s302, adding the material which is well kept stand in the S301, the polar styrene thermoplastic elastomer, the ethylene-octene copolymer, the talcum powder, the polyamide, the silicone and the color master batch into a high-speed mixer for physical mixing;
(4) Preparing a base cloth layer
S401, placing a base fabric on a base fabric winding roller of an auxiliary machine roller of the multilayer coextrusion tape casting compound equipment;
(5) Preparation of styrene thermoplastic elastomer artificial leather
S501, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C of a multilayer coextrusion casting compounding device; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B of the multilayer coextrusion casting compounding device; adding the surface material of the styrenic thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A of a multilayer coextrusion casting compounding device; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃; according to the film thickness and the film thickness distribution requirement, respectively adjusting the feeding amount of each extruder, the rotating speed of a screw rod and the thickness of a die lip at a flat die head;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain the styrene thermoplastic elastomer artificial leather.
Preferably, a foaming agent is added to the intermediate layer of the styrene-based thermoplastic elastomer, and the foamed styrene-based thermoplastic elastomer artificial leather is produced by a foaming step.
Preferably, the breathable porous artificial leather is prepared through a subsequent punching process, so that the breathability of the artificial leather is increased.
Preferably, the smooth flow extending film layer of the double-screw extruder A is positioned at the uppermost layer, the smooth flow extending film layer of the double-screw extruder B is positioned at the middle layer, and the smooth flow extending film layer of the double-screw extruder C is positioned at the lowermost layer.
Preferably, in the step (1), the drying temperature is 80 ℃, the drying time is 2-5 hours, and the mixing time in a high-speed mixer is 2-5 minutes; in the step (2), the mixing time in a high-speed mixer is 2-5 min, and the standing time after mixing is more than 3h; in the step (3), the mixing time in a high-speed mixer is 2-5 min, and the standing time after mixing is more than 3 h.
Compared with the prior art, the invention has the beneficial effects that:
(1) The thermoplastic elastomer material used for the artificial leather disclosed by the invention is mainly composed of one or two of SEBS and SEPS, and has excellent ageing resistance because unsaturated double bonds are not contained after hydrogenation; the plastic has plasticity and high elasticity, can be processed and used without vulcanization, can be reused, is green and environment-friendly, and does not contain volatile VOC; and the finished product has good hand feeling and hardness due to the polybutadiene or polyisoprene component of the soft segment;
(2) The polar thermoplastic elastomer used in the invention plays a role of bonding the base cloth layer and the resin layer, so that the resin layer and the base cloth layer have excellent peeling strength, no tackifier is needed to be additionally used, and the polar thermoplastic elastomer is environment-friendly and nontoxic;
(3) According to the invention, under the condition that tackifier is not added additionally, the multilayer coextrusion casting composite equipment is utilized for one-step molding, so that continuous production of products is realized.
Drawings
FIG. 1 is a schematic structural view of an artificial leather of the present invention;
in the figure: 1. a base cloth layer; 2. a TPS bottom layer; 3. a TPS interlayer; 4. a TPS surface layer;
FIG. 2 is a flow chart of the present invention for preparing artificial leather using a multi-layer co-extrusion casting compounding apparatus.
Detailed Description
The invention will be further illustrated with reference to specific examples, but the scope of the invention is not limited thereto. Those skilled in the art can and should appreciate that any simple changes or substitutions based on the true spirit of the invention should fall within the scope of the invention as hereinafter claimed.
Example 1
Referring to fig. 1, an environment-friendly styrene thermoplastic elastomer (TPS) artificial leather includes a resin layer and a base cloth layer 1, the base cloth layer being a polyester knitted fabric; the resin layer comprises a styrene thermoplastic elastomer bottom layer 2, a styrene thermoplastic elastomer middle layer 3 and a styrene thermoplastic elastomer surface layer 4, wherein the styrene thermoplastic elastomer bottom layer 2 is connected with the base cloth layer 1;
the styrene thermoplastic elastomer bottom layer consists of a polarized thermoplastic elastomer, wherein the polarized thermoplastic elastomer is a maleic anhydride grafted hydrogenated styrene-butadiene-styrene block copolymer (SEBS);
the styrene thermoplastic elastomer intermediate layer is prepared from the following components in percentage by mass: 55% of SEBS, 10% of maleic anhydride grafted SEBS and a kinematic viscosity of 70mm at 40 DEG C 2 10% of paraffin oil per second, 10% of ethylene-octene copolymer with a melt index of 5g/10min measured at 230 ℃/2.16kg, 5% of terpolymer polypropylene with a melt index of 6g/10min measured at 230 ℃/2.16kg, 5% of talcum powder with a mesh number of 1500 meshes and 5% of calcium carbonate with a mesh number of 1500 meshes;
the surface layer of the styrene thermoplastic elastomer is prepared from the following components in percentage by mass: 65% of SEBS, 10% of maleic anhydride grafted SEBS and a kinematic viscosity of 70mm at 40 DEG C 2 10% of paraffin oil per second, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured at 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 mesh, 2% of Polyamide (PA), 3% of silicone and 2% of masterbatch.
The preparation method of the TPS artificial leather comprises the following steps:
(1) Preparing a styrene thermoplastic elastomer bottom layer material:
s101, drying 100% maleic anhydride grafted SEBS in an air drying oven at 80 ℃ for 3 hours for standby (the following relates to polarized TPS, which is used after being dried according to the condition);
(2) Preparing a styrenic thermoplastic elastomer interlayer material:
s201, according to the qualityThe weight percentage of the SEBS is 55 percent, and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s202, adding the material subjected to standing in the S201 and 10% of maleic anhydride grafted SEBS, 10% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 5% of ternary copolymer polypropylene with a melt index of 6g/10min measured under the conditions of 230 ℃/2.16kg, 5% of talcum powder with a mesh number of 1500 meshes and 5% of calcium carbonate with a mesh number of 1500 meshes into a high-speed mixer for physical mixing for 3min;
(3) Preparing a surface material of a styrene thermoplastic elastomer:
s301, according to mass percentage, the SEBS is 65 percent, and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s302, adding the material which is well kept stand in the S301, 5% of ethylene-octene copolymer with the melt index of 5g/10min measured under the conditions of 10% of maleic anhydride grafted SEBS, 230 ℃/2.16kg, 3% of talcum powder with the mesh number of 1500 meshes, 2% of PA, 3% of silicone and 2% of color master batch into a high-speed mixer for physical mixing, wherein the mixing time is 3min;
the mass ratio of TPS bottom layer material to TPS middle layer material to TPS surface layer material is 1:1:1, a step of;
(4) Preparing a base cloth layer
S401, placing a polyester knitted fabric base fabric on a base fabric roller of an auxiliary machine roller of a multilayer coextrusion casting compound device;
(5) Preparation of styrene thermoplastic elastomer artificial leather
S501, referring to FIG. 2, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C (a smooth flow casting film layer is positioned at the lowest layer) of a multilayer coextrusion casting composite device; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B (a smooth flow-casting film layer is positioned at the middle layer) of a multilayer coextrusion casting compound device; adding the surface material of the styrenic thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A (a smooth flow casting film layer is positioned at the uppermost layer) of a multilayer coextrusion casting composite device; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃, the diameter of the double-screw extruder is 30mm, the rotating speed is 100rpm, and the total thickness of the prepared resin layer is about 300 mu m;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain the styrene thermoplastic elastomer artificial leather.
The prepared TPS artificial leather is subjected to performance detection, and the detection results are shown in Table 1.
The foaming agent can be added into the middle layer of the styrene thermoplastic elastomer, and the foaming styrene thermoplastic elastomer artificial leather can be prepared through a foaming step.
In addition, the breathable porous artificial leather can be prepared through a subsequent punching process, so that the breathability of the artificial leather is improved.
Example 2
A TPS artificial leather is prepared as follows:
(1) Preparing TPS bottom material:
s101, drying 100% of polyurethane and SEBS segmented copolymer in a blowing drying oven at 80 ℃ for 3 hours for standby;
(2) Preparing TPS interlayer materials:
s201, according to mass percentage, SEBS is 65 percent, and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s202, adding the material which is well kept stand in S201 and 10% of polyurethane and SEBS segmented copolymer, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 5% of ternary copolymer polypropylene with a melt index of 6g/10min measured under the conditions of 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 meshes and 2% of calcium carbonate with a mesh number of 1500 meshes into a high-speed mixer for physical mixing for 3min;
(3) Preparing TPS surface layer materials:
s301, according to mass percentage, 68% of SEBS and 70mm of kinematic viscosity at 40 DEG C 2 Adding 8% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s302, adding the material which is well kept stand in the S301, 10% of polyurethane and SEBS segmented copolymer, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 meshes, PA2%, silicone 2% and 2% of masterbatch into a high-speed mixer for physical mixing for 3min;
the mass ratio of TPS bottom layer material to TPS middle layer material to TPS surface layer material is 1:1:1, a step of;
(4) Preparing a base cloth layer
S401, placing a polyester knitted fabric base fabric on a base fabric roller of an auxiliary machine roller of a multilayer coextrusion casting compound device;
(5) Preparation of TPS Artificial leather
S501, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C (a smooth flow casting film layer is positioned at the lowest layer) of a multilayer coextrusion casting composite device; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B (a smooth flow-casting film layer is positioned at the middle layer) of a multilayer coextrusion casting compound device; adding the surface material of the styrenic thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A (a smooth flow casting film layer is positioned at the uppermost layer) of a multilayer coextrusion casting composite device; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃, the diameter of the double-screw extruder is 30mm, the rotating speed is 100rpm, and the total thickness of the prepared resin layer is about 300 mu m;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain TPS artificial leather.
The prepared TPS artificial leather is subjected to performance detection, and the detection results are shown in Table 1.
Example 3
A TPS artificial leather is prepared as follows:
(1) Preparing TPS bottom material:
s101, drying 100% of polyurethane and SEBS segmented copolymer in a blowing drying oven at 80 ℃ for 3 hours for standby;
(2) Preparing TPS interlayer materials:
s201, according to mass percentage, the SEPS is 55 percent, and the kinematic viscosity at 40 ℃ is 100mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s202, adding the material which is well kept stand in S201 and 10% of polyurethane and SEBS segmented copolymer, 10% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 5% of ternary copolymer polypropylene with a melt index of 6g/10min measured under the conditions of 230 ℃/2.16kg, 5% of talcum powder with a mesh number of 1500 meshes and 5% of calcium carbonate with a mesh number of 1500 meshes into a high-speed mixer for physical mixing for 3min;
(3) Preparing TPS surface layer materials:
s301, according to mass percentage, the SEPS is 65 percent, and the kinematic viscosity at 40 ℃ is 100mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s302, adding the material which is well kept stand in the S301, 10% of polyurethane and SEBS segmented copolymer, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 meshes, PA2%, silicone 3% and 2% of masterbatch into a high-speed mixer for physical mixing for 3min;
the mass ratio of TPS bottom layer material to TPS middle layer material to TPS surface layer material is 1:1:1, a step of;
(4) Preparing a base cloth layer
S401, placing polyester knitted fabric base fabric on a base fabric roller of an auxiliary machine roller of a multilayer coextrusion casting composite device;
(5) Preparation of TPS Artificial leather
S501, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C (a smooth flow casting film layer is positioned at the lowest layer) of a multilayer coextrusion casting composite device; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B (a smooth flow-casting film layer is positioned at the middle layer) of a multilayer coextrusion casting compound device; adding the surface material of the styrenic thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A (a smooth flow casting film layer is positioned at the uppermost layer) of a multilayer coextrusion casting composite device; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃, the diameter of the double-screw extruder is 30mm, the rotating speed is 100rpm, and the total thickness of the prepared resin layer is about 300 mu m;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain TPS artificial leather.
The prepared TPS artificial leather is subjected to performance detection, and the detection results are shown in Table 1.
Example 4
A TPS artificial leather is prepared as follows:
(1) Preparing TPS bottom material:
s101, drying 50% of polyurethane and SEBS block copolymer and 50% of maleic anhydride grafted SEBS in a blowing drying oven at 80 ℃ for 3 hours;
s102, placing the dried polar thermoplastic elastomer into a high-speed mixer for uniform mixing for later use;
(2) Preparing TPS interlayer materials:
s201, according to mass percentage, the SEBS is 55 percent, and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s202, adding the material subjected to standing in the S201 and 10% of maleic anhydride grafted SEBS, 10% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 5% of ternary copolymer polypropylene with a melt index of 6g/10min measured under the conditions of 230 ℃/2.16kg, 5% of talcum powder with a mesh number of 1500 meshes and 5% of calcium carbonate with a mesh number of 1500 meshes into a high-speed mixer for physical mixing for 3min;
(3) Preparing TPS surface layer materials:
s301, according to mass percentage, the SEBS is 65 percent, and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s302, adding the material which is well kept stand in the S301, 5% of ethylene-octene copolymer with the melt index of 5g/10min measured under the conditions of 10% of maleic anhydride grafted SEBS, 230 ℃/2.16kg, 3% of talcum powder with the mesh number of 1500 meshes, 2% of PA, 3% of silicone and 2% of color master batch into a high-speed mixer for physical mixing, wherein the mixing time is 3min;
the mass ratio of TPS bottom layer material to TPS middle layer material to TPS surface layer material is 1:1:1, a step of;
(4) Preparing a base cloth layer
S401, placing a polyester knitted fabric base fabric on a base fabric roller of an auxiliary machine roller of a multilayer coextrusion casting compound device;
(5) Preparation of TPS Artificial leather
S501, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C (a smooth flow casting film layer is positioned at the lowest layer) of a multilayer coextrusion casting composite device; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B (a smooth flow-casting film layer is positioned at the middle layer) of a multilayer coextrusion casting compound device; adding the surface material of the styrenic thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A (a smooth flow casting film layer is positioned at the uppermost layer) of a multilayer coextrusion casting composite device; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃, the diameter of the double-screw extruder is 30mm, the rotating speed is 100rpm, and the total thickness of the prepared resin layer is about 300 mu m;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain TPS artificial leather.
The prepared TPS artificial leather is subjected to performance detection, and the detection results are shown in Table 1.
Example 5
A TPS artificial leather is prepared as follows:
(1) Preparing TPS bottom material:
s101, drying 100% maleic anhydride grafted SEBS in an air drying oven at 80 ℃ for 3 hours for standby;
(2) Preparing TPS interlayer materials:
s201, according to mass percentage, the kinematic viscosity of the SEBS is 30%, the SEPS is 25% and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s202, adding the material subjected to standing in the S201 and 10% of maleic anhydride grafted SEBS, 10% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 5% of ternary copolymer polypropylene with a melt index of 6g/10min measured under the conditions of 230 ℃/2.16kg, 5% of talcum powder with a mesh number of 1500 meshes and 5% of calcium carbonate with a mesh number of 1500 meshes into a high-speed mixer for physical mixing for 3min;
(3) Preparing TPS surface layer materials:
s301, according to mass percentage, the kinematic viscosity of the SEBS is 35%, the SEPS is 30% and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s302, adding the material which is well kept stand in the S301, 5% of ethylene-octene copolymer with the melt index of 5g/10min measured under the conditions of 10% of maleic anhydride grafted SEBS, 230 ℃/2.16kg, 3% of talcum powder with the mesh number of 1500 meshes, 2% of PA, 3% of silicone and 2% of color master batch into a high-speed mixer for physical mixing, wherein the mixing time is 3min;
the mass ratio of TPS bottom layer material to TPS middle layer material to TPS surface layer material is 1:1:1, a step of;
(4) Preparing a base cloth layer
S401, placing a polyester knitted fabric base fabric on a base fabric roller of an auxiliary machine roller of a multilayer coextrusion casting compound device;
(5) Preparation of TPS Artificial leather
S501, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C (a smooth flow casting film layer is positioned at the lowest layer) of a multilayer coextrusion casting composite device; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B (a smooth flow-casting film layer is positioned at the middle layer) of a multilayer coextrusion casting compound device; adding the surface material of the styrenic thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A (a smooth flow casting film layer is positioned at the uppermost layer) of a multilayer coextrusion casting composite device; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃, the diameter of the double-screw extruder is 30mm, the rotating speed is 100rpm, and the total thickness of the prepared resin layer is about 300 mu m;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain the styrene thermoplastic elastomer artificial leather.
The prepared TPS artificial leather is subjected to performance detection, and the detection results are shown in Table 1.
Example 6
A TPS artificial leather is prepared as follows:
(1) Preparing TPS bottom material:
s101, drying 100% of polyurethane and SEPS segmented copolymer in a blowing drying oven at 80 ℃ for 3 hours for standby;
(2) Preparing TPS interlayer materials:
s201, according to mass percentage, SEPS is 65 percent, and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s202, adding the material which is well kept stand in S201 and 10% of polyurethane and SEPS segmented copolymer, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 5% of ternary copolymer polypropylene with a melt index of 6g/10min measured under the conditions of 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 meshes and 2% of calcium carbonate with a mesh number of 1500 meshes into a high-speed mixer for physical mixing for 3min;
(3) Preparing TPS surface layer materials:
s301, according to mass percentage, 68% of SEPS and 70mm of kinematic viscosity at 40 DEG C 2 Adding 8% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s302, adding the material which is well kept stand in the S301, 10% of polyurethane and SEPS segmented copolymer, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 meshes, PA2%, silicone 2% and 2% of masterbatch into a high-speed mixer for physical mixing for 3min;
the mass ratio of TPS bottom layer material to TPS middle layer material to TPS surface layer material is 1:1:1, a step of;
(4) Preparing a base cloth layer
S401, placing a polyester knitted fabric base fabric on a base fabric roller of an auxiliary machine roller of a multilayer coextrusion casting compound device;
(5) Preparation of TPS Artificial leather
S501, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C (a smooth flow casting film layer is positioned at the lowest layer) of a multilayer coextrusion casting composite device; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B (a smooth flow-casting film layer is positioned at the middle layer) of a multilayer coextrusion casting compound device; adding the surface material of the styrenic thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A (a smooth flow casting film layer is positioned at the uppermost layer) of a multilayer coextrusion casting composite device; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃, the diameter of the double-screw extruder is 30mm, the rotating speed is 100rpm, and the total thickness of the prepared resin layer is about 300 mu m;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain TPS artificial leather.
The prepared TPS artificial leather is subjected to performance detection, and the detection results are shown in Table 1.
TABLE 1
Figure BDA0002535355540000141
Remarks:
1. the surface appearance was a group of 10 evaluators, and it was determined whether or not the gloss difference of the artificial leather surface could be visually sensed for the artificial leather sample, and if the number of people who considered the gloss difference was 5 or more, it was defined that the gloss difference was present, and it was noted as "poor appearance", and if the number of people who considered the gloss difference was less than 5, it was defined that the gloss difference was not present, and it was noted as "excellent appearance".
2. The feel was directly touched by the hands of the internal panelists of the artificial leather to evaluate the degree of relative softness. The three classes are: very soft, flat touch.
From the results, the TPS artificial leather prepared by adopting the raw materials such as the styrene thermoplastic elastomer, the extender oil, the polar styrene thermoplastic elastomer and the like to be mixed and adopting the multi-layer coextrusion casting composite equipment to melt and coextrusion processing reaches and exceeds the use standard, is environment-friendly and has high production efficiency.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (1)

1. The preparation method of the environment-friendly styrene thermoplastic elastomer artificial leather is characterized by comprising the following steps of:
(1) Preparing a styrene thermoplastic elastomer bottom layer material:
s101, drying 100% of polyurethane and SEPS segmented copolymer in a blowing drying oven at 80 ℃ for 3 hours for standby;
(2) Preparing a styrenic thermoplastic elastomer interlayer material:
s201, according to mass percentage, SEPS is 65 percent, and the kinematic viscosity at 40 ℃ is 70mm 2 Adding 10% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s202, adding the material which is well kept stand in S201 and 10% of polyurethane and SEPS segmented copolymer, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 5% of ternary copolymer polypropylene with a melt index of 6g/10min measured under the conditions of 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 meshes and 2% of calcium carbonate with a mesh number of 1500 meshes into a high-speed mixer for physical mixing for 3min;
(3) Preparing a surface material of a styrene thermoplastic elastomer:
s301, according to mass percentage, 68% of SEPS and 70mm of kinematic viscosity at 40 DEG C 2 Adding 8% of paraffin oil per second into a high-speed mixer for physical mixing for 3min, standing for 4h after mixing, and grabbing materials by hands to feel dry and not to be stuck on hands;
s302, adding the material which is well kept stand in the S301, 10% of polyurethane and SEPS segmented copolymer, 5% of ethylene-octene copolymer with a melt index of 5g/10min measured under the conditions of 230 ℃/2.16kg, 3% of talcum powder with a mesh number of 1500 meshes, PA2%, silicone 2% and 2% of masterbatch into a high-speed mixer for physical mixing for 3min;
the mass ratio of the styrene thermoplastic elastomer bottom layer material to the styrene thermoplastic elastomer middle layer material to the styrene thermoplastic elastomer surface layer material is 1:1:1, a step of;
(4) Preparing a base cloth layer
S401, placing a polyester knitted fabric base fabric on a base fabric roller of an auxiliary machine roller of a multilayer coextrusion casting compound device;
(5) Preparation of styrene thermoplastic elastomer artificial leather
S501, adding the styrene thermoplastic elastomer bottom material prepared in the step (1) into a feeding bin of a double-screw extruder C of a multilayer coextrusion casting composite device, wherein a smooth casting film layer of the double-screw extruder C is positioned at the lowest layer; adding the intermediate layer material of the styrene thermoplastic elastomer prepared in the step (2) into a feeding bin of a double-screw extruder B of a multilayer co-extrusion casting composite device, wherein a smooth casting film layer of the double-screw extruder B is positioned at the middle layer; adding the surface material of the styrene thermoplastic elastomer prepared in the step (3) into a feeding bin of a double-screw extruder A of a multilayer coextrusion casting composite device, wherein a smooth casting film layer of the double-screw extruder A is positioned at the uppermost layer; simultaneously starting a double-screw extruder A, B, C, wherein the temperature of the extruder is set at 160-200 ℃, the diameter of the double-screw extruder is 30mm, the rotating speed is 100rpm, and the total thickness of the resin layer is 300 mu m;
s502, unwinding the base cloth while stably extending the film layer at the die lip of the flat die head of the multilayer coextrusion casting compound equipment, simultaneously compacting the casting roller and the embossing roller to enable the resin layer and the base cloth layer to be compounded by hot pressing, continuously stretching by a traction roller and a tension roller, and winding by a winding roller to obtain the styrene thermoplastic elastomer artificial leather.
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