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High springback wet method polyurethane resin for superfine fiber chemical leather

A wet-laid polyurethane and microfiber technology, used in textiles and papermaking, can solve the problems of poor resilience, creases, and easy contamination of microfiber synthetic leather base fabrics, and achieve good shape retention and crease. Delicate, leather-like effect

Active Publication Date: 2009-01-07
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the synthetic leather prepared by using the above wet-process polyurethane resin is resistant to folding at room temperature (25°C × 5000 times), after being placed at room temperature for 20 minutes, the crease cannot be self-corrected due to the poor resilience of the ultrafine fiber synthetic leather base cloth. The creases are deep and wide, so that sports shoes or casual shoes have obvious creases and are easy to get dirty after wearing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 0.1mol of PTMG2000, 0.2-0.4mol of ethylene glycol, appropriate amount of DMF, and 0.1g of BHT into a three-necked flask, heat to about 50°C to dissolve and stir evenly, then add 0.15-0.25mol of MDI at a temperature of 60-100°C React for 120-180 minutes, then add about 0.05mol of MDI every 30 minutes, add solvent DMF depending on the viscosity, when the viscosity meets the requirements, use methanol to terminate the reaction, and add all the solvent DMF , kept at the same temperature for about 60 minutes, cooled to 50°C, and unloaded to obtain sample 1#

Embodiment 2

[0025] Add 0.1mol of PTMG2000, 0.2-0.4mol of 1,4-butanediol, appropriate amount of DMF, and 0.1g of BHT into a three-neck flask, heat to about 50°C to dissolve and stir evenly, then add 0.15-0.25mol of MDI at 60- React at a temperature of 100°C for 120-180 minutes, then add about 0.05mol of MDI every 30 minutes, and add solvent DMF depending on the viscosity. When the viscosity meets the requirements, use methanol to terminate the reaction, and add All the solvent DMF was kept at the same temperature for about 60 minutes, cooled to 50°C, and sample 2# was obtained by unloading

Embodiment 3

[0027] Add 0.1mol of PTMG2000, 0.1-0.2mol of ethylene glycol, appropriate amount of DMF, and 0.1gBHT into a three-necked flask, heat to about 50°C to dissolve and stir evenly, then add 0.3-0.5mol of MDI at a temperature of 60-100°C React for 120-180 minutes, then cool down to 40-50°C, add 10% 4,4-diaminodiphenylmethane (MDA) DMF solution dropwise with a dropping funnel, and add solvent DMF depending on the viscosity. When required, capped with methanol to terminate the reaction, and added all the solvent DMF, kept at the same temperature for about 60min, cooled to 50°C, and unloaded to obtain sample 3#.

[0028] The obtained resin samples 1#, 2#, and 3# were prepared according to the following impregnation formula for synthetic leather base cloth:

[0029] serial number

raw material name

Dosage

[0030] 1

PU resin

100

2

DMF

30～60

3

Foam stabilizer

0.1～0.5

4

penetrant

0.1～0.3...

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PUM

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Abstract

The invention relates to high resilience wet urethane resin for superfine fiber synthetic leather, which is mainly composed of polyether or polyester polyol, chain extenders and diisocyanate, and the mol ratio of the components is 1 of the polyester polyol, 1.5 to 3 of the chain extenders and 2.5 to 4 of diisocyanate. The high resilience wet urethane resin has the advantages that base cloth impregnated by the urethane resin has good resilience, strong real leather feeling, subtle lines of the base cloth after being reduced in weight, split, expanded, enlarged in size, dried, oiled and kneaded, the lines of the shoes made of shoe synthetic leather (especially for sports shoes and casual shoes) prepared by the base cloth, which are generated during wearing, can automatically restore due to the good resilience, the gauffer of the shoe upper is small, therefore the shoes can have good shape, and the quality is lifted to a higher level.

Description

technical field [0001] The invention relates to a superfine fiber synthetic leather, in particular to a base cloth in the superfine fiber synthetic leather. Background technique [0002] Microfiber synthetic leather is generally composed of microfiber synthetic leather base cloth, adhesive layer and surface layer. Since the adhesive layer and the surface layer only account for a very small part of the synthetic leather, the main factor affecting the resilience of the microfiber synthetic leather is the resilience of the microfiber base cloth. [0003] The microfiber base fabric is composed of microfibers as a skeleton support and polyurethane sponge as a filler, forming a so-called "flesh and bone" structure, in which polyurethane sponge is the key factor affecting the resilience of microfiber synthetic leather. [0004] At present, the chain extenders used in the production of wet-process polyurethane resins for synthetic leather are generally small molecule aliphatic diol...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/48D06N3/00
Inventor 夏佳弟刘国邬花元邵凤姣孙向浩
Owner HUAFON MICROFIBER SHANGHAI
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