Water-based dry-bonded split leather transfer-film leather and preparation method thereof

A technology of split leather and film-transferred leather, which is applied in textiles and papermaking, and can solve the problems of pollution in tanning and resin factories, environmental hazards, and waste of materials, etc., and achieve resistance to jungle hydrolysis, high peel strength, and improved wear resistance performance effect

Pending Publication Date: 2022-03-01
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the use of solvent-based polyurethane resin, which contains dimethylformamide (DMF), butanone (MEK), toluene (Toluene), etc., although there is a solvent recovery device, is not ideal, resulting in waste of data and environmental pollution. , tens of thousands of tons of exhaust

Method used

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  • Water-based dry-bonded split leather transfer-film leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of slurry for surface layer, middle layer and dry paste layer:

[0042] 1. Preparation of slurry for surface layer and middle layer:

[0043] Get 100kg of water-based polyurethane resin 3250 (manufactured by Wanhua Chemical), 25kg of world famous water-based white pulp, 1kg of Chongyao Chemical SL-3248 wetting and leveling agent, 2kg of associative polyurethane thickener 2kg of water-based isocyanate curing agent 166. 3kg of Shanghai Rufeng Chemical NH5 silicon powder solution, 1kg of Xintema Chemical Lithene Ultra N4-9000 wear-resistant agent. Add it into a blender, stir until the slurry is evenly dispersed, and finally filter.

[0044] 2. Preparation of slurry for dry paste:

[0045] Get 80kg of water-based polyurethane resin 1258 (manufactured by Wanhua Chemical), 20kg of waterborne epoxy resin 0901 (produced by Wanhua Chemical), 0.5kg of Chongyao Chemical SL-3248 wetting and leveling agent, 1.5kg of associative polyurethane thickener 5kg ...

Embodiment 2

[0052] 1. Preparation of slurry for surface layer, middle layer and dry paste layer:

[0053] 1. Preparation of slurry for surface layer and middle layer:

[0054] Get 100kg of water-based polyurethane resin 3966 (manufactured by Wanhua Chemical), 8kg of world famous water-based black slurry, 1.5kg of Chongyao Chemical SL-3248 wetting and leveling agent, 1.5kg of associative polyurethane thickener 2kg of water-based isocyanate curing agent 166. Add 5kg of Shanghai Rufeng Chemical NH5 silicon powder solution and 2kg of Xintema Chemical Lithene Ultra N4-9000 wear-resistant agent into the mixer, stir until the slurry is evenly dispersed, and finally filter.

[0055] 2. Preparation of slurry for dry paste:

[0056] Get 50kg of water-based polyurethane resin 1258 (manufactured by Wanhua Chemical), 50kg of waterborne epoxy resin 0906 (produced by Wanhua Chemical), 0.5kg of Chongyao Chemical SL-3248 wetting and leveling agent, 1.5kg of associative polyurethane thickener 5...

Embodiment 3

[0063] 1. Preparation of slurry for surface layer, middle layer and dry paste layer:

[0064] 1. Preparation of slurry for surface layer and middle layer:

[0065] Get 100kg of water-based polyurethane resin 3252 (manufactured by Wanhua Chemical), 30kg of world famous water-based white pulp, 1kg of Chongyao Chemical SL-3248 wetting and leveling agent, 1kg of associative polyurethane thickener 2.5kg of water-based isocyanate curing agent 166. Add 4kg of Shanghai Rufeng Chemical NH5 silicon powder solution and 3kg of Xintema Chemical Lithene Ultra N4-9000 wear-resistant agent into the mixer, stir until the slurry is evenly dispersed, and finally filter.

[0066] 2. Preparation of slurry for dry paste:

[0067] Get 70kg of water-based polyurethane resin 1258 (manufactured by Wanhua Chemical), 30kg of waterborne epoxy resin 0903 (produced by Wanhua Chemical), 0.5kg of Chongyao Chemical SL-3248 wetting and leveling agent, 1.5kg of associative polyurethane thickener 8kg ...

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Abstract

The invention provides water-based dry-sticking split leather transfer-film leather and a preparation method thereof.The preparation method comprises the steps that auxiliaries such as a water-based wetting agent, a curing agent and a thickening agent are added into water-based polyurethane resin, a surface material, an intermediate material and a dry-sticking sticking material of the water-based polyurethane resin are prepared through stirring, a surface layer is firstly scraped on release paper through a dry-method transfer-film technology, then the surface layer is scraped on the release paper through a dry-method transfer-film technology, and the dry-sticking sticking material is scraped on the release paper through a dry-method transfer-film technology; the water-based dry-sticking split leather transfer-film leather is prepared by the following steps of: drying the release paper, scraping a middle layer after drying, scraping a dry-sticking sticking layer after drying, drying to be transparent at high temperature, sticking with split leather under the pressure of 3-5kg, attaching a PET (Polyethylene Terephthalate) film, rolling, curing in a greenhouse, and stripping the release paper and the PET film, thereby obtaining the water-based dry-sticking split leather transfer-film leather. The obtained water-based dry-sticking split leather transfer-film leather can be applied to the field of sneaker leather, is high in peel strength, resistant to bending at normal and low temperatures and resistant to jungle hydrolysis, can improve the additional value of split leather, is comparable to first-layer leather, can effectively and uniformly permeate a dry-sticking layer according to the compaction degrees of different leather blanks, guarantees stable peel strength, and has a good application prospect. The method is suitable for large-scale mass production.

Description

technical field [0001] The invention relates to the technical field of leather, and specifically discloses a water-based dry-applied two-layer transfer film leather and a preparation method thereof. Background technique [0002] Natural leather such as cowhide is relatively thick. In order to improve the utilization rate of leather in the process of tanning, it is usually divided into two or three layers. The top layer of leather is used to make high-grade genuine leather after surface coating. The second layer of leather has no surface texture layer. Generally, the second layer of leather is made into suede by sanding and dyeing, which is a lower-grade product. At present, the production principle of polyurethane (PU) artificial leather is mostly used in the production of split leather. The solvent-based PU film adds a layer of PU to the surface of the split leather according to the production method of transfer, so that it has the hygroscopicity of genuine leather. Dimens...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/14D06N3/0097D06N3/0059D06N2209/16
Inventor 赵炳炎李卫飞孙军坤
Owner WANHUA CHEM GRP CO LTD
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