Solvent-free synthetic leather and manufacturing method thereof

A manufacturing method and technology of synthetic leather, applied in textiles and papermaking, etc., can solve the problems of inability to achieve diversification of color, quality and trend effect, affect the service life of release paper, affect the peeling of paper leather, etc., and achieve international market competitiveness Improve, improve service life, prevent excessive penetration effect

Active Publication Date: 2016-03-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above methods, materials A and B are directly coated on the release paper. When materials A and B react on the release paper to form a macromolecular coating or adhesive layer, their active groups will also interact with the release paper. Active groups react to form a strong bond (release paper will produce active groups when oxidized at high temperature), one affects the peeling of paper leather, and the other seriously affects the service life of release paper (release paper is a synthetic leather manufactu

Method used

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  • Solvent-free synthetic leather and manufacturing method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 The manufacture of solvent-free sofa leather

[0040] (1) Preparation of solvent-free polyurethane slurry and water-based surface layer slurry (parts by weight)

[0041]a) Preparation of solvent-free slurry: 100 parts of hydroxyl-terminated aromatic solvent-free polyurethane, 12.0 parts of polycarbodiimide crosslinking agent, 5.0 parts of color paste, 10.0 parts of wood powder, and 0.3 parts of TegoFlow300 type leveling agent at room temperature Mix evenly;

[0042] b) Preparation of water-based surface layer slurry: 100 parts of internal cross-linked aromatic water-based surface layer polyurethane with a modulus of 60Mpa and a solid content of 40%, 20 parts of water-based color paste, and 0.3 parts of BYK-034 water-based defoamer , 0.5 parts of RM-2020NPR water-based thickener are mixed evenly, and made into a surface layer slurry with a viscosity of 3000mPa.s;

[0043] (2) Base cloth pretreatment

[0044] The base fabric is unrolled, stretched, and the...

Embodiment 2

[0052] The manufacture of embodiment 2 solvent-free garment leather

[0053] (1) Preparation of solvent-free polyurethane slurry and water-based surface layer slurry (parts by weight)

[0054] a) Preparation of solvent-free polyurethane slurry: 100 parts of amino-terminated aliphatic solvent-free polyurethane, 10.0 parts of dicyclohexyl diisocyanate, 10.0 parts of color paste, 5.0 parts of light calcium carbonate, 1.0 parts of TEGOGlide100 type leveling agent at room temperature Mix evenly;

[0055] b) Preparation of water-based surface layer slurry: 100 parts of internal cross-linked aliphatic water-based surface layer polyurethane with a modulus of 50Mpa and a solid content of 30%, 10 parts of water-based color paste, 0.3 parts of Foamex1495 water-based defoamer, TT Mix 0.5 parts of -935 water-based thickener evenly, and make a surface layer slurry with a viscosity of 3000mPa.s;

[0056] (2) Base fabric pretreatment: Base fabric is unrolled, stretched, and then sprayed wit...

Embodiment 3

[0064] Embodiment 3 The manufacture of solvent-free automotive interior leather

[0065] (1) Preparation of solvent-free polyurethane slurry and water-based surface layer slurry (parts by weight)

[0066] a) Preparation of solvent-free polyurethane slurry: 50 parts of amino- and hydroxyl-terminated aliphatic solvent-free polyurethanes, 7.5 parts of polycarbodiimide and polyaziridine crosslinking agents, 8.0 parts of color paste, and 2.0 parts of carbon black , 3.0 parts of pottery clay, 3.0 parts of barium sulfate, 0.8 parts of Silok8450 type leveling agent and mix well at room temperature;

[0067] b) Preparation of water-based surface layer slurry: 100 parts of internal cross-linked aliphatic water-based surface layer polyurethane with a modulus of 50Mpa and a solid content of 35%, 15 parts of water-based color paste, 0.2 parts of Silok4650 water-based defoamer, ASE Mix 0.4 parts of -60 type water-based polyurethane thickener evenly, and make a surface layer slurry with a v...

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Abstract

The invention discloses solvent-free synthetic leather and a manufacturing method thereof. The method is characterized by comprising the following steps: firstly, directly coating pretreated base cloth with mixed slurry prepared from solvent-free polyurethane, an assistant and a solvent-free cross-linking agent; solidifying the base cloth coated with mixed slurry through an oven to prepare a semi-finished product; coating release paper with water-based polyurethane as surface resin, and drying and transferring the release paper to the semi-finished product; and carrying out water-based surface treatment to obtain environment-friendly solvent-free synthetic leather. The polyurethane free of a solvent directly coats the base cloth, and is solidified and cross-linked to manufacture the synthetic leather. The technology is small in damage to the release paper, non-toxic, free of pollution, low in energy consumption, low in cost and high in efficiency; traditional solvent-type polyurethane is comprehensively replaced with the solvent-free polyurethane and the water-based polyurethane in combination; the variety, the style and the bandwagon effect of a product are diverse; meanwhile, pollution of an organic solvent is eliminated from the source; the product does not contain VOC; and the ecological grade, the finished product level and the international market competitiveness of the synthetic leather are improved.

Description

technical field [0001] The invention belongs to the field of synthetic leather manufacturing, and in particular relates to a solvent-free synthetic leather and a manufacturing method thereof. Background technique [0002] my country is the largest producer and consumer of synthetic leather in the world. At present, there are more than 1,100 artificial leather and synthetic leather enterprises in the country, more than 470 enterprises above designated size, and nearly 2,000 production lines. It is one of the pillar industries of my country's light industry. In 2014, the output of artificial leather and synthetic leather of enterprises above designated size was 3.78 million tons, equivalent to 6.8 billion m 2 . Artificial leather synthetic leather has become an important industry in some local industries. The geographical distribution of my country's artificial leather and synthetic leather industry is mainly concentrated in the Yangtze River Delta and Pearl River Delta and...

Claims

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Application Information

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IPC IPC(8): D06N3/14
CPCD06N3/14
Inventor 范浩军章培昆陈意颜俊田赛琦汪峰石碧
Owner SICHUAN UNIV
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