Method of preparing back coated real leather intimating synthetic leather

A manufacturing method and technology of artificial leather, applied in textiles and papermaking, etc., can solve the problems of long process flow, low grade rate and low production efficiency of artificial leather synthetic leather, and achieve diversified leather styles, high grade rate, The effect of high production efficiency

Active Publication Date: 2009-05-27
ANHUI ANLI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The imitation leather synthetic leather manufactured by traditional technology has a long process, complex equipment, high energy consumption, low production efficiency, low grade rate, and poor leather feel.

Method used

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  • Method of preparing back coated real leather intimating synthetic leather
  • Method of preparing back coated real leather intimating synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] A kind of manufacture method of back-coated imitation leather synthetic leather:

[0037] (1) Knitted fleece is used as a wet-laid base material.

[0038] (2) Preparation of wet-process single-coating materials: prepare slurry according to the traditional single-coat wet-process PU slurry system, knife-coat to the substrate, solidify, and wash with water.

[0039] (3) Preparation of wet-process back-coated foaming materials;

[0040] According to the formula of the slurry, it is calculated by weight:

[0041] Foaming resin (ST-1030) 100 parts

[0042] 80 parts of dimethylformamide (DMF)

[0043] Foaming agent (461DU40) 0.5 part

[0044] Foaming agent (461DU40) 1.5 parts

[0045] Solvent-based color paste 5 parts

[0046] (4) Back-coat the foaming slurry to the wet base, then dry: 120°C for 3 minutes, foaming: 135°C for 20 seconds for low-temperature foaming;

[0047] (5) Grinding treatment of the back of the wet-process crust leather: 80 mesh sandpaper grinding t...

example 2

[0050] A kind of manufacture method of back-coated imitation leather synthetic leather:

[0051] (1), 0.9mm*220g / m 2 All polyester as base material;

[0052] (2) Knife coating, coagulation, and water washing of wet DC process materials: according to the traditional DC process formula system.

[0053] (3) Preparation of wet-process back-coated foaming materials;

[0054] According to the formula of the slurry, it is calculated by weight:

[0055] Foaming resin (ST-1040) 100 parts

[0056] 80 parts of dimethylformamide (DMF)

[0057] Foaming agent (461DU40) 1 part

[0058] Foaming agent (461DU40) 3 parts

[0059] 2 parts solvent-based color paste

[0060] (4) Back-coat the foaming slurry to the wet base, then dry: 130°C for 3 minutes, foaming: 150°C for 15 seconds;

[0061] (5) Grinding treatment of the back of the wet process crust leather: 150 mesh sandpaper grinding treatment;

[0062] (6) Pattern transfer of dry-process release paper on the front of wet crust leathe...

example 3

[0064] A kind of manufacture method of back-coated imitation leather synthetic leather:

[0065] (1), 0.60mm double-sided raised fabric woven fabric as wet substrate;

[0066] (2) Knife coating, coagulation, and water washing of wet DC materials: according to the traditional DC process formula system.

[0067] (3) Preparation of wet-process back-coated foaming materials;

[0068] According to the formula of the slurry, it is calculated by weight:

[0069] Foaming resin (ST-1040) 100 parts

[0070] 55 parts of dimethylformamide (DMF)

[0071] Foaming agent (461DU40) 0.5 part

[0072] Foaming agent (909DU80) 5 parts

[0073] (4) Back-coat the foaming slurry to the wet base, then dry: 120°C for 2.5 minutes, foaming: 180°C for 10 seconds at high temperature;

[0074](5) Grinding treatment of the back of the wet process leather: 240 mesh sandpaper grinding treatment;

[0075] (6) Pattern transfer of dry-process release paper on the front of wet crust leather.

[0076] illus...

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Abstract

The invention discloses a method for manufacturing back-coated skin-imitated synthetic leather. The method comprises: coating wet-process PU slurry onto the surface of base cloth to form a base green body; after solidifying and washing the base green body, coating foaming slurry on the back of the base green body; washing and drying the base green body and foaming the base green body to form wet-process crust leather; and finally grinding the back of the wet-process crust leather and carrying out dry-process release paper pattern transfer to the front of the wet-process crust leather, wherein the foaming slurry comprises foaming resin ST-1030 or ST-1040, dimethylformamide (DMF), a foaming agent and so on. The method uses the prior synthesis device and research on special foaming slurry to carry out once forming process of the skin-imitated synthetic leather, namely, the method simplifies the prior post processing processes for producing skin-imitated synthetic leather such as pile coating, real leather powder coating and suede foaming into a wet-process once forming process.

Description

technical field [0001] The invention relates to a manufacturing process of polyurethane synthetic leather, in particular to a manufacturing process of synthetic leather with a fabric structure similar to genuine leather on the back of the synthetic leather by means of wet back coating. Background technique [0002] Polyurethane synthetic leather (PU synthetic leather) is a kind of artificial synthetic leather that uses various cloth bases as substrates, and coats polyurethane resin on the substrates to impart various patterns and patterns. In order to achieve the fibrous structure of leather on the back of synthetic leather, the traditional manufacturing method is: first make a wet-process base, and then perform secondary processing on the back of the wet-process base: flocking, planting leather powder, foaming sheepbucks, etc. method, and then grind the crust leather and other processes to achieve the effect similar to genuine leather on the back. The imitation leather syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/18
Inventor 王燕武李道鹏姚和平杨滁光吴建民
Owner ANHUI ANLI MATERIAL TECH
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