Preparation technology of suede leather

A preparation process and technology for suede leather, applied in the field of synthetic leather, can solve the problems of suede leather being harmful to human health, poor hand feeling, not soft suede leather, etc., and achieve the effects of smooth surface, uniform pile length and good hand feeling

Inactive Publication Date: 2020-07-10
ZHEJIANG FANSHENG MICROFIBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the disadvantages of the suede prepared from the impregnated slurry containing organic solvents that are harmful to human health in the current suede leather preparation process, and the suede prepared from the impregnated slurry prepared by using water-based polyurethane resin. Not soft, often poor hand feeling and other problems, a suede leather preparation process using liquid polyisocyanate and liquid polyol liquid as the main formula to prepare polyurethane prepolymer impregnated slurry

Method used

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  • Preparation technology of suede leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: A preparation process of suede leather, including the following preparation steps:

[0032] 1) Preparation of non-woven fabric base fabric: the non-woven fabric for bass is made by using fixed island-type sea-island fibers through cotton opening, carding, netting, needle punching reinforcement and ironing, and the non-woven fabric for bass has a weight of 500g / m 2 , The density is 0.26g / cm 3 , The thickness is 1.8mm;

[0033] 2) Resin impregnation: 80 parts of multi-OH-based prepolymer JF-NS-6011A, 20 parts of multi-NCO-based prepolymer JF-NS-6011B, 2 parts of trimethylolpropane, 4 parts of MSH-550 hollow foam Microspheres, 30 parts of calcium powder, 1 part of Tego Flow 300 leveling agent, 4 parts of color paste are mixed, stored at 30°C at a constant temperature and reacted to a viscosity of 35000mPa·s to obtain a polyurethane prepolymer impregnated slurry, and then the polyurethane is prepolymerized The body impregnation slurry is impregnated in the non-woven...

Embodiment 2

[0038] Embodiment 2: A preparation process of suede leather, including the following preparation steps:

[0039] 1) Preparation of non-woven fabric base fabric: use fixed island-type sea-island fibers through opening, carding, netting, needle-punch reinforcement and ironing processes to make a non-woven fabric for bass. The non-woven fabric for bass has a weight of 400g / m 2 , The density is 0.2g / cm 3 , The thickness is 1.6mm;

[0040] 2) Resin impregnation: 70 parts of multi-OH-based prepolymer JF-NS-6011A, 15 parts of multi-NCO-based prepolymer JF-NS-6011B, 3 parts of trimethylolpropane, 3 parts of MSH-550 hollow foam Microspheres, 25 parts of montmorillonite, 2 parts of Silok 355 leveling agent, 4 parts of color paste are mixed, and the reaction is stored at 25°C at a constant temperature until the viscosity is 40000mPa·s to obtain polyurethane prepolymer impregnated slurry, and then the polyurethane is prepolymerized The body impregnation slurry is impregnated in the non-woven...

Embodiment 3

[0045] Embodiment 3: A preparation process of suede leather, including the following preparation steps:

[0046] 1) Preparation of non-woven fabric base fabric: use fixed island-type sea-island fibers through opening, carding, netting, needle-punch reinforcement and ironing processes to make bass non-woven fabric, the bass non-woven fabric gram weight is 600g / m 2 , The density is 0.32g / cm 3 , The thickness is 2.2mm;

[0047] 2) Resin impregnation: 90 parts of multi-OH-based prepolymer JF-NS-6011A, 25 parts of multi-NCO-based prepolymer JF-NS-6011B, 4 parts of trimethylolpropane, 2 parts of MSH-550 hollow foam Microspheres, 35 parts of wood powder, 1 part of Silok 8230 leveling agent, 2 parts of color paste were mixed, stored at 20°C at a constant temperature and reacted to a viscosity of 45000mPa·s to obtain polyurethane prepolymer impregnated slurry, and then polyurethane prepolymer The impregnated slurry is impregnated in the non-woven fabric for bass;

[0048] 3) Shaping: Heat ...

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Abstract

The invention discloses a preparation technology of suede leather. The preparation technology comprises the following preparation steps that (1) non-woven fabric base cloth is prepared; (2) resin impregnation is carried out, wherein polyurethane prepolymer slurry impregnates the non-woven fabric for a bass; (3) sizing is carried out; (4) reduction and splitting are carried out; (5) the non-woven fabric, subjected to reduction and splitting, for the bass is dried and sized; and (6) grinding, intermediate splitting and ash removal are carried out, and thus the suede leather is prepared and obtained. A liquid-state multi-NCO-group prepolymer and a liquid-state multi-OH-group prepolymer are adopted as a main formula to prepare the polyurethane prepolymer impregnation slurry, the viscosity of the polyurethane prepolymer impregnation slurry is controlled, the gram weight and density of the responding non-woven fabric for the bass are adopted for cooperation, the prepared suede leather is healthy and harmless to human bodies, waterborne polyurethane resin is not adopted as the impregnation slurry, and the texture of the non-woven fabric for the bass is softer.

Description

Technical field [0001] The invention relates to the field of synthetic leather, in particular to a preparation process of suede leather. Background technique [0002] Suede leather is a kind of synthetic leather that has a fluffy feel by coating foaming resin on the surface of the base cloth and foaming at high temperature. It is a general term for leather with fine velvet on the surface. It is mostly used for pigskin, cowhide, and sheepskin. Made by chrome tanning method, the suede is only sanded and dyed, without finishing, and has good hygiene. However, in the impregnation process of the existing suede leather preparation method, the impregnation slurry usually contains organic solvents, which causes the suede leather to be finally prepared to be harmful to human health, and the impregnation slurry prepared by the water-based polyurethane resin is used for impregnation. Afterwards, the suede leather prepared finally is not soft, and the hand feel is often poor. [0003] For ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14
CPCD06N3/0011D06N3/0043D06N3/14D06N3/0077D06N2211/28
Inventor 杨振东王国强孙进琳王友忠
Owner ZHEJIANG FANSHENG MICROFIBER PROD
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