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Preparation method of waterborne polyurethane synthetic leather base

A water-based polyurethane and manufacturing method technology, applied in textiles and papermaking, etc., can solve problems such as application lag, achieve the effects of reducing equipment investment, simple process route, reducing energy waste and environmental pollution

Active Publication Date: 2011-06-01
兰州科天水性科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of water-based polyurethane resin in synthetic leather is relatively lagging behind, mainly focusing on the surface finishing of synthetic leather. Only water-based dry film transfer technology and printing technology are applied in actual production, and the base of water-based polyurethane synthetic leather is still only in laboratory development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (a) The bottom fabric in the step is W-1023S120 non-woven fabric of Fujian Nanfang Co., Ltd., 1.0mm, 230g / m 2 , PA30 / PET70;

[0042] polyvinyl alcohol

2 copies

Fiber softener

1 copy

water

100 copies

[0043] The liquid carrying rate of the pretreated base cloth is 60%.

[0044] (c) The drying temperature in the step is 130°C.

[0045] Anionic Aliphatic Waterborne Polyurethane

100 copies

water

30 copies

acrylic thickener

4 parts

water-based paint paste

3 copies

[0046] Isocyanate crosslinking agent

1 copy

[0047] After impregnation, the liquid-carrying rate of the non-woven fabric is 60%.

[0048] Anionic Aliphatic Waterborne Polyurethane

100 copies

fatty acid salt surfactant

2 copies

Succinamide salt

3 copies

acrylic thickener

4 parts

water-based paint paste

1 copy

Isocyanate crosslinking...

Embodiment 2

[0052] (a) The bottom fabric in the step is Fujian Nanfang Co., Ltd. HS-1028, 1.0mm, 280g / m 2 High-density non-woven fabric.

[0053] polyvinyl alcohol

3 copies

Fiber softener

1.5 servings

water

100 copies

[0054] The liquid carrying rate of the pretreated base cloth is 50%.

[0055] (c) The drying temperature in the step is 150°C.

[0056] Anionic Aromatic Waterborne Polyurethane

100 copies

Polyurethane thickener

1 copy

water-based paint paste

1 copy

[0057] After impregnation, the liquid-carrying rate of the non-woven fabric is 50%.

[0058] Anionic Aromatic Waterborne Polyurethane

100 copies

fatty acid salt surfactant

1.5 servings

Succinamide salt

2 copies

Polyurethane thickener

1 copy

water-based paint paste

1 copy

Lignocellulosic

1 copy

[0059] Apply by roller coating after mechanical foaming.

[0060] (f) T...

Embodiment 3

[0062] (a) The base fabric in the step is made of Fujian Nanfang 0.55mm PU leather base fabric (black gray, wet).

[0063] Fiber softener

1 copy

water

100 copies

[0064] Steps (c) and (d) do not need to be carried out, and step (e) is carried out directly.

[0065] Anionic Aliphatic Waterborne Polyurethane

100 copies

fatty acid salt surfactant

2 copies

Succinamide salt

3 copies

acrylic thickener

4 parts

[0066] water-based paint paste

1 copy

Isocyanate crosslinking agent

3 copies

Ultrafine silica

1 copy

[0067] After mechanical foaming, it is applied by scraping method.

[0068] (f) In the step of drying, infrared heating is adopted, and the temperature gradient of the oven is 50-70-90-110-130°C.

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Abstract

The invention relates to a preparation method of a waterborne polyurethane synthetic leather base. A waterborne polyurethane resin takes water as a dispersing medium, is nontoxic, environmentally-friendly, safe and inflammable and is an optimal substitute product for a solvent resin. However, the application of the waterborne polyurethane resin to synthetic leather is relatively hysteretic, and is mainly concentrated on surface finishing of the synthetic leather. The preparation method of the waterborne polyurethane synthetic leather base comprises the following steps of: designing a base fabric; pretreating; drying; soaking in waterborne polyurethane slurry; coating a waterborne polyurethane foamed coating; and drying. The product has the basic structure of a solvent type wet process synthetic leather base and has handfeel and physical properties close to those of the solvent type synthetic leather base; solvents are not used for processing in the entire production process; the preparation method can be applied to post-processing manufacturing of any synthetic leather product; and a waterborne polyurethane material is used for post-processing, so that the synthetic leather base can be used for manufacturing shoe leather, sofa leather, case leather, clothes leather and the like.

Description

technical field [0001] The invention relates to a method for manufacturing a water-based polyurethane synthetic leather base. Background technique [0002] Solvent-based resins contain a large amount of volatile organic solvents (VOC), which are discharged into the atmosphere during use, which not only damages the environment and endangers human health, but also causes waste of resources and energy. At present, the production and processing of the entire synthetic leather industry is based on the base of solvent-based polyurethane, and a large number of organic solvents are used in the production process, such as dimethyl formamide, methyl ethyl ketone, acetone, toluene, ethyl acetate, etc. These solvents It is extremely harmful to the human body. Generally, the solid content of polyurethane resin for synthetic leather is about 30%, and the organic solvent content reaches 70%, and a certain amount of organic solvent will be added during the processing of synthetic leather,...

Claims

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Application Information

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IPC IPC(8): D06N3/14
Inventor 罗晓民冯见艳曲建波李鹏妮
Owner 兰州科天水性科技有限公司
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