CN112030571A - Skin layer composition and uniformly light-transmitting PVC artificial leather prepared from same - Google Patents

Skin layer composition and uniformly light-transmitting PVC artificial leather prepared from same Download PDF

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Publication number
CN112030571A
CN112030571A CN201910477196.6A CN201910477196A CN112030571A CN 112030571 A CN112030571 A CN 112030571A CN 201910477196 A CN201910477196 A CN 201910477196A CN 112030571 A CN112030571 A CN 112030571A
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China
Prior art keywords
pvc
artificial leather
skin layer
color paste
layer
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Pending
Application number
CN201910477196.6A
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Chinese (zh)
Inventor
周兰城
陈红梅
李强
滕大勇
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Benecke Changshun Auto Trim Zhangjiagang Co Ltd
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Benecke Changshun Auto Trim Zhangjiagang Co Ltd
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Application filed by Benecke Changshun Auto Trim Zhangjiagang Co Ltd filed Critical Benecke Changshun Auto Trim Zhangjiagang Co Ltd
Priority to CN201910477196.6A priority Critical patent/CN112030571A/en
Priority to PCT/CN2020/093232 priority patent/WO2020244455A1/en
Publication of CN112030571A publication Critical patent/CN112030571A/en
Pending legal-status Critical Current

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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
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
    • D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • 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
    • 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
    • D06N3/0043—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
    • 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
    • D06N3/0056—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
    • D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
    • 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
    • D06N3/0056—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
    • 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
    • D06N3/0056—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
    • D06N3/0065—Organic pigments, e.g. dyes, brighteners
    • 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
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
    • 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
    • D06N3/06—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 polyvinylchloride or its copolymerisation products
    • 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
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
    • 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
    • D06N2209/00—Properties of the materials
    • D06N2209/08—Properties of the materials having optical properties
    • D06N2209/0807—Coloured
    • D06N2209/0823—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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
    • D06N2209/00—Properties of the materials
    • D06N2209/08—Properties of the materials having optical properties
    • D06N2209/0869—Translucent
    • 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
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/26—Vehicles, transportation
    • D06N2211/263—Cars
    • 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
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

The invention relates to a skin layer composition for forming PVC artificial leather with uniform light transmission, which comprises PVC resin, a skin layer plasticizer, a stabilizer and color paste, wherein the skin layer composition contains 0.51-5.6% of the color paste based on the total weight of the skin layer composition, and the color paste is inorganic and organic compound color paste formed by mixing inorganic color powder, organic color powder and the color paste plasticizer. The present invention also relates to a PVC artificial leather capable of uniformly transmitting light, which comprises a PVC skin layer formed of the aforementioned skin layer composition. The PVC artificial leather according to the present invention can be applied to artificial leather, such as automotive interior, which is desired to have a color of sufficient hiding power by itself but can uniformly transmit light under illumination, and has more uniform light transmission effect than conventional materials.

Description

Skin layer composition and uniformly light-transmitting PVC artificial leather prepared from same
Technical Field
The present invention relates to a skin layer composition for forming uniformly light-transmitting PVC artificial leather, and uniformly light-transmitting PVC artificial leather prepared from the skin layer composition.
Background
Polyvinyl chloride (i.e., PVC) is a main raw material in the production and development of artificial leather, and is widely used in automotive interiors. With the development of society, people pay attention to performance when buying automobiles, and put forward higher requirements on automobile interiors, and hope that the automobile interiors are cool and have more technological sense. In this regard, the lighting effect of an automobile is undoubtedly a means for improving the technological and aesthetic effects.
However, the conventional PVC artificial leather is opaque. In order to obtain light transmission, the associated light source can usually only be penetrated by the perforated structure of PVC artificial leather, which has the disadvantages: the light transmission effect obtained by the perforation mode is easy to bring non-uniformity of the light transmission effect along with non-uniformity of the aperture; the uneven cell size in the foamed layer of the main structure also tends to produce uneven light transmission effect.
In this regard, the improvement of the light transmission of Polyurethane (PU) or polyvinyl chloride (PVC) artificial leather is described in DE102015101331a1, the structure of which generally comprises a base fabric, a skin light-transmitting layer and a paint layer. It is generally mentioned in this document that the factors that influence the light transmission of artificial leather, including mainly the thickness, amount and kind of the layers and the pigment content in the layers and the kind and density of the base cloth, influence. However, the above-mentioned respective influencing factors are not specifically described and analyzed herein, and the improvement of the performance is not specifically made for various artificial leather substrates.
In addition, CN102367318A discloses the preparation of a polystyrene light-transmitting color master batch, which comprises polystyrene and solvent-based transparent dye accounting for 0.01-10% of the total weight of the polystyrene. However, the transparent dye in a lower content is not sufficient to provide a desired color hiding power, and, currently, a raw material in a slurry form is generally used for processing in the production of PVC artificial leather, and the dye in a color masterbatch form is not suitable for a process of processing PVC artificial leather.
Disclosure of Invention
Based on the above prior art, it is an object of the present invention to provide a skin layer composition for forming uniformly light-transmitting PVC artificial leather, and uniformly light-transmitting PVC artificial leather produced therefrom. The PVC artificial leather can be applied to artificial leather, such as automotive interior, which is desired to have a color of sufficient hiding power by itself but can uniformly transmit light under illumination, and has a more uniform light transmission effect than conventional materials.
In order to achieve the above technical objects, the present invention provides a skin layer composition for forming a PVC artificial leather uniformly transmitting light, comprising a PVC resin, a skin layer plasticizer, a stabilizer, and a color paste, wherein the skin layer composition comprises 0.51 to 5.6%, for example, 0.51%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.6% or a color paste ranging between any two of these values, based on the total weight of the skin layer composition, preferably comprises 0.51 to 4.0% of a color paste, and the color paste is an inorganic complex organic color paste obtained by mixing an inorganic color powder, an organic color powder, and a color paste plasticizer.
The content of the mill base in the skin layer composition (also referred to as "color depth") has a decisive influence on the light transmission of the composition. The invention finds that the color paste accounting for 0.51-5.6%, preferably 0.51-4.0% of the total weight of the skin layer composition can realize better light transmission. On the one hand, a content of more than 5.6% of the colorant may result in a deterioration in the transparency of the product. On the other hand, a color paste content of less than 0.51% results in insufficient color hiding power of the product, and thus causes a reduction in stain resistance of the product, in which case, discoloration under heat aging or light conditions and at a later time of processing may have a significant negative effect on the appearance of the product.
According to the invention, the color paste is an inorganic-organic compound color paste formed by mixing inorganic toner, organic toner and a color paste plasticizer. The color paste plasticizer plays a role in dissolving the color paste, and on one hand, the addition of the color paste plasticizer prevents the over-high viscosity of the compounded color paste and the uneven dispersion of the toner in the skin layer composition; on the other hand, the addition amount of the color paste plasticizer needs to ensure that the product still retains enough color covering power and does not influence the thermal stability and the light aging property of the product. The traditional single inorganic color paste has good color coverage rate, and the obtained product has stable physical properties, but poor light transmittance; the single organic color paste can ensure that the light transmittance of the product is good, but the ratio of light stability to thermal stability is poor, and the actual service life of the product can be influenced. According to the invention, the inorganic-organic compound color paste has the advantages of balancing the light transmittance, the color coverage rate and the physical properties of the final product, for example, the inorganic-organic compound color paste which is prepared from phthalocyanine, titanium dioxide, aniline toner and plasticizer according to a specific proportion is used.
According to the invention, the ratio of the total weight of the toner in the color paste to the total weight of the color paste plasticizer is 1: 7 to 1: 2.2, e.g. 1: 7. 1: 6.5, 1: 6. 1: 5.5, 1: 5. 1: 4.5, 1: 4. 1: 3.5, 1: 3. 1: 2.5, 1: 2.4, 1: 2.3, 1: 2.2 or a ratio within a range between any two of these values. If the content of the color paste plasticizer is too large, the heat resistance and the illumination resistance of a finished product can be reduced, and the finished product is easy to age; if the total toner content is too low, the light transmission of the finished product is greatly attenuated, affecting the light transmission performance. Meanwhile, the ratio of the total weight of the toner in the color paste to the total weight of the plasticizer in the color paste meets the above limit, and the color fluctuation which may occur in the color paste can be balanced.
According to a preferred embodiment of the invention, the weight ratio of the inorganic toner to the organic toner in the color paste is more than or equal to 3: 1, less than 13: 1, preferably 11 or less: 1. the weight ratio of the inorganic and organic toner is 3: 1 to 13: 1 can meet the requirements on light resistance and heat resistance of products while achieving light transmittance. In order to minimize the color fluctuation of the color paste, the weight ratio of the inorganic and organic toners is further preferably 3: 1 to 11: 1, in the range of.
According to one embodiment of the present invention, the epidermal layer composition comprises
38% -49%, e.g., 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, or a range between any two of these values;
47% -57%, e.g., 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, or a range between any two of these values; and
optionally 1.9% -5.9%, e.g., 1.9%, 2%, 3%, 4%, 5%, 5.1%, 5.2%, 5.3%, 5.4%, 5.5%, 5.6%, 5.7%, 5.8%, 5.9% or a stabilizer within a range between any two of these values.
The choice of the content of PVC resin and skin plasticizer is based on the performance requirements of the application material, in particular strength and hardness, and the requirements of practical processing. If the content of the PVC resin is too large or the content of the plasticizer is too low, the flowability in the PVC processing process is poor, the processing is not facilitated, and the hardness and toughness of the produced PVC leather are too large and not enough; if the PVC resin content is too low, or the plasticizer content is too high, the strength of the PVC leather may be insufficient. Stabilizers are used to provide good stability against heat and light.
According to the invention, the skin layer plasticizer is a long-chain alkane or aromatic ring type plasticizer, such as dialkyl phthalate; the stabilizer is a light-resistant and heat-resistant stabilizer, such as an organic epoxy stabilizer. In addition, the color paste plasticizer and the skin layer plasticizer can be the same or different. Preferably, the color paste plasticizer and the skin layer plasticizer are selected from the same plasticizer.
In order to achieve the technical objects mentioned at the outset, the present invention also proposes a PVC artificial leather capable of uniform light transmission, comprising a PVC skin layer formed from the above-mentioned skin layer composition according to the present invention.
The aforementioned characteristics and technical effects applicable to the skin layer composition are also applicable to the PVC artificial leather, and are not described repeatedly herein in order to avoid redundancy.
According to a preferred embodiment of the invention, a PVC foam layer is provided on the inside of the PVC skin layer. The foaming layer mainly has the function of providing comfort and softness of the artificial leather material, so that the artificial leather material can better meet the requirements of practical application. In order to ensure the light transmittance of the whole PVC artificial leather, the foamed layer preferably has also a light transmittance. According to a preferred embodiment of the present invention, in order to improve the light transmittance of the foamed layer and thus the light transmittance of the entire PVC artificial leather, it is preferable that the foamed layer does not contain color paste, thereby contributing to further increase of the light transmittance and keeping it uniform. More preferably, the other components of the foamed layer are also colorless, thereby ensuring that the entire foamed layer is colorless. The colorless foam layer has the function of reducing the attenuation of light transmittance. Of course, the foamed layer may also contain a certain proportion of color paste, and in this case, the foamed layer may also have a light transmission effect, but the light transmission performance may be attenuated to a certain degree.
According to one embodiment of the invention, the PVC foam layer comprises, based on the total weight of the foam layer: 38% -48.5%, e.g., 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 48.5%, or a range between any two of these values;
45-55%, e.g., 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, or a range between any two of these values;
1.8% -5.8%, e.g., 1.8%, 1.9%, 2.0%, 3.0%, 4.0%, 5.0%, 5.1%, 5.2%, 5.3%, 5.4%, 5.5%, 5.6%, 5.7%, 5.8%, or a stabilizer within a range between any two of these values; and
0.3% -2.7%, e.g., 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, or a range between any two of these values.
Here, the PVC resin in the skin layer may be the same as or different from the PVC resin in the foam layer; the skin layer plasticizer, the color paste plasticizer and the foaming layer plasticizer can be the same or different; the stabilizer in the skin layer may be the same as or different from the stabilizer in the foam layer. The blowing agent may be selected from a variety of chemical blowing agents known to those skilled in the art, such as azo-based blowing agents, or physical blowing agents, such as microspheres formed from a polymer shell encapsulating an alkane gas.
In principle, both conventional chemical and physical blowing agents can be used in the foamed layer of the invention. According to a preferred embodiment of the invention, the foaming agent in the foamed layer is a physical foaming agent, preferably microspheres formed by wrapping an alkane gas in a polymer shell. The product obtained using the physical blowing agent has more uniformly distributed cells than in the case of the chemical blowing agent, thereby achieving more uniform light transmittance of the product.
In addition, other auxiliary agents, such as ultraviolet absorbers, flame retardants, etc., may be included in the PVC skin layer and the foaming layer, and conventional materials well known to those skilled in the art may be selected as needed.
According to a preferred embodiment of the present invention, a paint layer is provided above the PVC skin layer, and in order to secure the light transmittance of the entire PVC artificial leather, the paint layer preferably also has light transmittance. The surface coating may be carried out using conventional paints known in the art. In the present invention, the coating is preferably performed using an aqueous polyurethane paint. The formula of the waterborne polyurethane paint comprises 70-80 parts by weight of waterborne polyurethane modified resin and 8-20 parts by weight of auxiliary agent. The gloss, hand feel, and light, heat, dirt, abrasion, scratch, and other functionalities of the surface of the obtained PVC artificial leather can be advantageously improved by performing surface treatment by printing paint on the surface of the material.
In order to improve the light transmittance of the paint layer and further improve the light transmittance of the whole PVC artificial leather, it is preferable that the paint layer is colorless and transparent, and no substance having an influence on the light transmittance is additionally added, so that the influence on the light transmittance of the PVC material can be reduced. Of course, the paint can also contain a proper amount of colored substances so as to meet different requirements on the surface color of the artificial leather, however, the addition of the colored substances in the paint can affect the light transmittance and attenuate the light transmittance.
According to a preferred embodiment of the invention, a pattern is provided on the paint layer. The high temperature embossing is performed on the paint layer in order to make the final PVC artificial leather have the same appearance pattern and feel as genuine leather. However, the pattern produced by embossing on the paint layer affects the light transmission effect of the material. Therefore, in order to minimize the effect on the light transmission properties of the material, the grain texture should be designed to be as fine and shallow as possible, with insignificant surface texture ravines. According to a preferred embodiment of the invention, the pattern of the paint layer has a depth of 135-.
According to a preferred embodiment of the invention, a base cloth is arranged below the PVC foam layer. In order to ensure the light transmittance of the integral PVC artificial leather, it is also preferable that the base fabric has light transmittance. In order to reduce the influence of the base fabric on the light transmission and further improve the light transmission of the whole PVC artificial leather, according to one embodiment of the invention, a chemical fiber base fabric, preferably a pure polyester base fabric, is adopted, and the base fabric has compact fabric patterns, so that the influence of fine fibers attached to the surface of the base fabric during the textile process on the light transmission performance or the defect of light transmission can be reduced.
According to the invention, the PVC foaming layer and the base cloth can be bonded together by glue or by hot pressing. According to one embodiment of the invention, the glue comprises 38% to 49% of plasticizer in the glue, 47% to 57% of PVC resin and 1.9% to 5.9% of stabilizer, based on the total weight of the glue. The glue helps to firmly adhere the foaming layer and the base fabric, wherein the components such as PVC resin, plasticizer and the like are used for providing basic physical properties of the material as described in the skin layer and the foaming layer.
The TPO artificial leather containing the base fabric structure has better mechanical property due to the existence of the base fabric, so that the TPO artificial leather is more suitable for sewing and can be used for manual coating, thereby adhering the artificial leather to an automotive interior framework and ensuring that the operation is more convenient. Of course, the light-transmitting PVC artificial leather according to the present invention may not contain a base fabric, and in this case, in order to prevent tearing at the time of sewing, it is generally attached to the automobile interior frame by vacuum adsorption, female molding, or low pressure injection molding.
In order to prepare the PVC artificial leather uniformly light-transmitting according to the present invention, a preparation method comprising the steps of:
(A) preparing inorganic and organic compound color paste in advance, and uniformly mixing inorganic and organic toner and a color paste plasticizer;
(B) preparing a PVC surface layer which contains PVC resin, surface layer plasticizer, stabilizer and pre-prepared inorganic and organic compound color paste,
and/or preparing a PVC foaming layer, wherein the foaming layer contains PVC resin, a foaming layer plasticizer, a stabilizer and a foaming agent;
(C) printing a paint layer on the PVC skin layer and/or the foaming layer;
(D) high-temperature embossing is carried out on the paint layer on one side of the PVC surface layer.
According to the invention, in the actual operation, single color paste can be optionally prepared respectively, wherein the single color paste is prepared by mixing a single toner and a color paste plasticizer according to the weight ratio of 1: 0.5 to 1: 3, preferably the weight ratio of the single toner to the color paste plasticizer is 1: 1. and then, further mixing the obtained different single color pastes with additional color paste plasticizers to prepare the final inorganic and organic compound color paste. In order to realize higher and uniform light transmittance of the finally obtained PVC artificial leather, higher cleanliness is ensured as much as possible in the production process, thereby optimizing the light transmittance of the final product.
In the present invention, all the features and corresponding technical effects of the aforementioned skin layer composition and the corresponding PVC artificial leather are applicable to the method for manufacturing the PVC artificial leather, and will not be described repeatedly herein. The PVC artificial leather with uniform light transmission can be applied to automobile door panels, instrument panels, consoles, stand columns, seat back panels, seat fabrics and the like.
The invention has the advantages that:
the PVC composition and the PVC artificial leather formed therefrom according to the present invention can satisfy both the color hiding requirement and the uniform light transmittance, and can transmit light in the area where the light source is laid.
The PVC artificial leather is mainly divided into four layers, namely a paint layer, a surface layer, a foaming layer and a base fabric, the formula combination of different layers causes the difference of the final performance of the material, and the PVC artificial leather can be applied to the parts such as automobile seats, armrests, door panels, instrument panels and the like through manual coating besides the conventional processes such as vacuum adsorption, female die forming, low-pressure injection molding and the like due to the combination of the base fabric.
The translucent PVC structural design obtained by the invention enables the light transmittance to be unaffected by the pore size of the perforated structure and the cell size of the foaming layer, and realizes a more uniform light transmittance effect compared with the traditional material, thereby increasing the potential application range of the material and simultaneously reducing the additional production cost brought by the perforated structure.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description will be made for clarity and completeness in combination with examples and comparative examples, and it is obvious that the described examples are a part of the examples of the present invention, but not all of the examples. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1:
the PVC artificial leather with uniform light transmission is prepared according to the following steps:
mixing the slurry: preparing inorganic and organic compound color paste according to the formula of the compound color paste given in the table 1; subsequently, a slurry of the PVC skin layer was prepared by stirring and mixing under vacuum according to the formulation of the PVC skin layer given in table 1; a slurry of a PVC foam layer was prepared by stirring and mixing 47 wt% of a dialkyl phthalate plasticizer, 49 wt% of a PVC paste resin, 2.5 wt% of an organic epoxy stabilizer, and 1.5 wt% of a physical foaming agent under a vacuum environment.
Coating: the release paper was sent, first coated with a slurry of PVC skin layer on a coater, and baked in a drying tunnel at 180 ℃ for 30 seconds. After cooling, the PVC film was further sent to a coater, and a slurry of a PVC foam layer was coated on the PVC skin layer and dried in a drying tunnel at 180 ℃ for 30 seconds. And then, drying the PVC leather coated with the back coating in an oven at 200 ℃ for 60 seconds to complete the foaming of the PVC foaming layer and the integral plasticization of the PVC leather so as to obtain the finally required hardness. After cooling, the release paper was peeled off from the formed laminate, and a polyester base fabric was compounded on the surface of the foamed layer.
Printing: preheating artificial leather, printing the preheated artificial leather by 3 times of waterborne polyurethane system paint, printing the colorless and transparent waterborne polyurethane system paint on the surface of a PVC epidermal layer, drying for 10 seconds by an inter-plate drying oven at 90 ℃ between each time of paint printing, and drying for 40 seconds by an oven at 140 ℃ after all the 3 times of paint printing are finished.
Embossing: pressing patterns on the surface of the painted artificial leather at the embossing temperature of 200 ℃, endowing the patterns with the patterns, cooling, inspecting, storing and rolling.
Cutting: the artificial leather coiled material obtained after the preparation can be cut and packaged according to the required size.
Table 1: formulation of example 1
Figure BDA0002082646270000081
Figure BDA0002082646270000091
The PVC artificial leather thus obtained was measured for tensile strength, tear strength, softness, Flex resistance (balloon Flex) and light transmittance, heat resistance, light resistance, and the results are shown in the following table 2:
table 2: properties of PVC Artificial leather obtained according to example 1
Content of test Test method Test results
Tensile strength ISO 1421 Longitudinal direction: 750N lateral: 380N
Tear strength ISO 4674 Longitudinal direction: 30N in the transverse direction: 50N
Softness GMW 3390 Longitudinal direction: 160mm transverse direction: 160mm
Resistance to buckling ISO 5402 Without cracking
Light transmittance * 14.8％
Heat resistance GMW 14124 Qualified
Light resistance GMW 14162 Gray scale rating of 4.0
Detection method of light transmittance: adopt datacolor tools plus software, use little blackboard to rectify the white light source of wavelength in the 580nm scope, put the PVC synthetic leather in light source mouth department after the completion of correction, click american datacolor850 colorimetry analyzer and begin the test, datacolorthos plus software carries out data processing with the white light's that the material saw through volume, finally obtains the data of luminousness, and the bigger euphotic effect of numerical value is better.
Practice ofExamples 2 to 6:
in comparison with example 1, the formulation of the inorganic-organic complex color paste and the content of the color paste (also referred to as "color concentration") in the PVC skin layer were changed according to the formulation in table 3, the PVC artificial leather of examples 2-6 were prepared in the same manner as in example 1, and the transmittance of the PVC artificial leather was measured in the same transmittance measuring method as in example 1, and the results of transmittance, heat resistance, and illumination resistance are also shown in table 3.
Table 3: variables of examples 2 to 6
Figure BDA0002082646270000092
Figure BDA0002082646270000101
Comparative examples 1 to 3:
the PVC artificial leather of comparative examples 1 to 3 was prepared in the same manner as in example 1 by changing the formulation of the inorganic-organic compounded color paste and the color paste content (also referred to as "color concentration") in the PVC skin layer according to the formulation in table 4, compared to example 1, and the light transmittance of the PVC artificial leather was measured in the same light transmittance measuring method as in example 1, and the results of light transmittance, heat resistance, and light irradiation resistance are also shown in table 4.
Table 4: variants of comparative examples 1 to 3
Figure BDA0002082646270000102
Figure BDA0002082646270000111
Comparative example 4:
according to the formulation in table 5, PVC artificial leather was prepared in the same manner as in example 1, and the transmittance of the PVC artificial leather was measured in the same transmittance measuring method as in example 1, and the results of transmittance, heat resistance, and light resistance are also shown in table 5.
Table 5: formulation of comparative example 4
Figure BDA0002082646270000112
Figure BDA0002082646270000121
And (4) comparing the results:
it is shown by the results of examples 1 to 6 that when an inorganic-organic compounded color paste is used in the skin layer and its content is 0.51 to 5.6% by weight, the obtained PVC artificial leather has sufficient color hiding power and good light transmission, while satisfying the requirements with respect to light and heat resistance, and without affecting the other mechanical properties of the material.
In the case of the color concentration of 0.3 wt% in comparative example 1, although the obtained PVC artificial leather has a light transmittance of 19.1%, it is not qualified in both heat resistance and light resistance (the qualification standard for light resistance is gray scale rating of 4.0 and above); comparative examples 2 and 3 the obtained PVC artificial leather was almost opaque in the case of color concentrations of 6.7 wt% and 9.3 wt%, respectively.
It can be seen from a comparison of comparative example 4 with example 3 that, in the case of color pastes having a content of 0.51% in the skin layer, the light transmittance of the product obtained with a single inorganic color paste is significantly worse than that obtained with an inorganic-organic compound color paste.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (11)

1. The skin layer composition for forming the PVC artificial leather with uniform light transmission comprises PVC resin, a skin layer plasticizer and color paste, and is characterized in that the skin layer composition contains 0.51-5.6% of the color paste based on the total weight of the skin layer composition, and the color paste is inorganic and organic compound color paste formed by mixing inorganic color powder, organic color powder and the color paste plasticizer.
2. The skin composition of claim 1 wherein the ratio of total weight of toner in the mill base to total weight of mill base plasticizer is 1: 7 to 1: 2.2.
3. the skin-layer composition according to claim 1, wherein the weight ratio of the inorganic toner to the organic toner in the color paste is greater than or equal to 3: 1, less than 13: 1, preferably 11 or less: 1.
4. a skin layer composition according to any one of claims 1 to 3, comprising from 38% to 49% of a skin layer plasticizer, from 47% to 57% of a PVC resin, based on the total weight of the skin layer composition.
5. A PVC artificial leather capable of uniform light transmission, comprising a PVC skin layer formed from the skin layer composition according to any one of claims 1 to 4.
6. The PVC artificial leather according to claim 5, wherein a PVC foaming layer is arranged on the inner side of the PVC skin layer, the foaming layer has light transmittance, and preferably the foaming layer does not contain color paste.
7. The PVC artificial leather according to claim 6, wherein the foaming layer contains a foaming agent, preferably the foaming agent is a physical foaming agent.
8. The PVC artificial leather according to claim 5, wherein a paint layer is provided above the PVC skin layer, said paint layer having light transmittance, preferably said paint layer being colorless and transparent.
9. The PVC artificial leather according to claim 8, wherein patterns are arranged on the paint layer, and the depth of the patterns is 135-155 μm.
10. The PVC artificial leather according to claim 6, wherein a base cloth is provided under the PVC foaming layer, the base cloth having light transmittance.
11. The PVC artificial leather according to claim 10, wherein the base fabric is a chemical fiber base fabric, preferably a pure polyester base fabric.
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