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Wet type low-VOC high-durability sofa furniture polyurethane synthetic leather and preparation method thereof

A durable, polyurethane technology, used in textiles and papermaking, fiber processing, plant fibers, etc., can solve the problems of difficult to effectively control the VOC content of finished leather, affect the appearance and use, and be difficult to meet, and achieve good washing effect. The effect of reducing solvent output and low VOC content

Inactive Publication Date: 2017-12-26
ANHUI ANLI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the improvement of people's living standards, people have put forward higher requirements for the environmental protection and durability of synthetic leather. Most polyurethane sofa furniture leathers on the market generally show different degrees of surface peeling after only 2-3 years. Phenomenon, which seriously affects the appearance and use
In addition, due to insufficient water washing during the processing of wet-laid leather, there are more residual solvents (DMF), and in addition to the solvent-based (DMF, ETAC) release paper veneer process in the latter stage, the VOC content of the finished leather is very difficult. Under effective control, it is difficult to meet the EU's ROHS and REACH standards

Method used

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  • Wet type low-VOC high-durability sofa furniture polyurethane synthetic leather and preparation method thereof
  • Wet type low-VOC high-durability sofa furniture polyurethane synthetic leather and preparation method thereof
  • Wet type low-VOC high-durability sofa furniture polyurethane synthetic leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing polyurethane synthetic leather for wet-process low-VOC high-durability sofa furniture, comprising the following steps:

[0029] (1) Select the thick 0.65mm polyester viscose double-sided raised cloth as the cloth base, first place the cloth base in a surfactant aqueous solution with a mass concentration of 1-3% for impregnation pretreatment, and then squeeze and iron to obtain pre-processing the cloth base;

[0030] (2) Coating wet-process polyurethane slurry on the surface of the pre-treated cloth base, and then condensing-washing-pre-drying-drying to obtain wet-fabric base; the thickness of wet-fabric base is 0.9mm; pre-drying adopts a length of 50m Vertical "double S" type pre-drying structure, the pre-drying temperature is 100°C; the drying is heated at 150°C by an oven with a length of 30m.

[0031] (3) Use two-component water-based polyurethane resin to carry out reverse roller coating treatment process on wet bass, and the glue amount is 1...

Embodiment 2

[0038] A method for preparing polyurethane synthetic leather for sofa furniture with low VOC and high durability by wet method, comprising the following steps:

[0039] (1) Select the thick 0.65mm polyester viscose double-sided raised cloth as the cloth base, first place the cloth base in a surfactant aqueous solution with a mass concentration of 1-3% for impregnation pretreatment, and then squeeze and iron to obtain pre-processing the cloth base;

[0040] (2) Coating wet-process polyurethane slurry on the surface of the pre-treated cloth base, and then condensing-washing-pre-drying-drying to obtain wet-fabric base; the thickness of wet-fabric base is 0.93mm; pre-drying adopts a length of 50m Vertical "double S" type pre-drying structure, the pre-drying temperature is 110°C; the drying is heated at 140°C by an oven with a length of 30m.

[0041] (3) Use two-component water-based polyurethane resin to carry out reverse roller coating treatment process on wet bass, and the glue...

Embodiment 3

[0048] A method for preparing polyurethane synthetic leather for sofa furniture with low VOC and high durability by wet method, comprising the following steps:

[0049] (1) Select the thick 0.65mm polyester viscose double-sided raised cloth as the cloth base, first place the cloth base in a surfactant aqueous solution with a mass concentration of 1-3% for impregnation pretreatment, and then squeeze and iron to obtain pre-processing the cloth base;

[0050] (2) Coating wet-process polyurethane slurry on the surface of the pre-treated cloth base, and then condensing-washing-pre-drying-drying to obtain wet-fabric base; the thickness of wet-fabric base is 0.87mm; pre-drying adopts a 50m length Vertical "double S" type pre-drying structure, the pre-drying temperature is 105°C; the drying is heated at 145°C by an oven with a length of 30m.

[0051] (3) Use two-component water-based polyurethane resin to carry out reverse roller coating treatment process on wet bass, and the glue am...

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Abstract

The invention provides a preparation method of wet type low-VOC high-durability sofa furniture polyurethane synthetic leather, which comprises the following steps of coating the surface of a pretreatment cloth substrate with wet type polyurethane slurry, carrying out agglomeration, water scrubbing, pre-drying and drying to obtain wet type bass; performing reverse roll roller coating process on the wet bass by using two-component waterborne polyurethane resin to obtain a high wear-resistant semi-finished product; embossing the high wear-resistant semi-finished product through a roller press to obtain a finished product. The preparation process of the invention is beneficial to the improvement of processing environment and greatly reduces the output of solvents. The VOC content of the finished leather is low and can be controlled to 100ppm or below; durability is realized, and the product can resist hydrolysis for 10 years or more.

Description

technical field [0001] The invention relates to a polyurethane synthetic leather, in particular to a wet-process low-VOC high-durability polyurethane synthetic leather for sofa furniture and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, people have put forward higher requirements for the environmental protection and durability of synthetic leather. Most polyurethane sofa furniture leathers on the market generally show different degrees of surface peeling after only 2-3 years. The phenomenon seriously affects the appearance and use. In addition, due to insufficient water washing during the processing of wet-laid leather, there are more residual solvents (DMF), and in addition to the solvent-based (DMF, ETAC) release paper veneer process in the latter stage, the VOC content of the finished leather is very difficult. It is difficult to meet the EU's ROHS and REACH standards if it is effectively controlled. Cont...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00D06M13/256D06M101/32D06M101/06
CPCD06N3/145D06M13/256D06M2101/06D06M2101/32D06N3/0056D06N3/0061D06N3/0077D06N3/0088D06N2209/143D06N2209/1685D06N2211/28
Inventor 张吕香王燕武王振强王锐林戴俊王森黄万里
Owner ANHUI ANLI MATERIAL TECH
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