Water-based wet preparation method of genuine leather case leather

A technology for luggage leather and genuine leather, which is applied in the field of genuine leather luggage leather prepared by water-based wet method, can solve the problems of mildew, airtightness, and difficult adhesion, etc., and achieve the effect of improving wear resistance and waterproof performance

Active Publication Date: 2018-12-11
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although genuine leather has great advantages in breathability, softness and skin-friendly feeling, the world calls for building a harmonious society, protecting animals, and protecting the environment. However, the production process of genuine leather seriously pollutes the environment, and the content of heavy metals tends to exceed the standard.
Moreover, the finished product rate is low in the processing process, resulting in high cost, which is difficult to be accepted by middle and low-end consumers
At present, the materials for producing synthetic leather are mainly two kinds of polyurethane resin (PU) and elastic polyvinyl chloride (PVC) sol, both of which are petroleum products. will have adverse effects
Moreover, the water-based polyurethane foam material in the prior art is difficult to adhere to the leather, and there are problems of easy mold, cracking and bubbling with the leather, and the wear resistance and waterproof performance need to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing genuine leather luggage leather by an aqueous wet method, comprising the following steps:

[0034] 1) Leather base material treatment: Polish any side of the leather first, and then soak it with an impregnation solution made up of 50 parts of tap water and 1 part of antifungal agent. After soaking, iron it with an ironing roller. The leather substrate has a humidity of 40% to 50%;

[0035] 2) Coating: First, prepare foaming slurry: 100 parts of anionic water-based polyurethane resin with a solid content of 30%, 2.5 parts of powder wetting agent, 25 parts of lignocellulose, 2 parts of dispersant, 4.5 parts of foaming agent 4.5 parts, 4.5 parts of foam stabilizer, 1.5 parts of crosslinking agent; then on the treated leather substrate in step 1) coat 500g / m 2 foaming slurry;

[0036] 3) Coagulation: Pass the leather substrate coated with the foaming slurry through the coagulation tank, spray the coagulation liquid with a spray gun for coagulation, ...

Embodiment 2

[0040] A method for preparing genuine leather luggage leather by an aqueous wet method, comprising the following steps:

[0041] 1) Leather base material treatment: Polish any side of the leather first, and then soak it with an impregnation solution made up of 50 parts of tap water and 1 part of antifungal agent. After soaking, iron it with an ironing roller. The leather substrate has a humidity of 40% to 50%;

[0042]2) Coating: First, prepare foaming slurry: 100 parts of anionic water-based polyurethane resin with a solid content of 35%, 2.8 parts of powder wetting agent, 28 parts of lignocellulose, 4 parts of dispersant, and 5 parts of foaming agent part, 5 parts of foam stabilizer, 1.6 parts of cross-linking agent; then on the treated leather base material in step 1) coat 600g / m 2 foaming slurry;

[0043] 3) Coagulation: Pass the leather substrate coated with the foaming slurry through the coagulation tank, spray the coagulation liquid with a spray gun for coagulation, s...

Embodiment 3

[0047] A method for preparing genuine leather luggage leather by an aqueous wet method, comprising the following steps:

[0048] 1) Leather base material treatment: Polish any side of the leather first, and then soak it with an impregnation solution made up of 50 parts of tap water and 1 part of antifungal agent. After soaking, iron it with an ironing roller. The leather substrate has a humidity of 40% to 50%;

[0049] 2) Coating: First, prepare foaming slurry: 100 parts of anionic water-based polyurethane resin with a solid content of 40%, 3 parts of powder wetting agent, 30 parts of lignocellulose, 5 parts of dispersant, and 5 parts of foaming agent 5.5 parts, 5.5 parts of foam stabilizer, 1.6 parts of cross-linking agent; then on the treated leather base material in step 1), coat 700g / m 2 foaming slurry;

[0050] 3) Coagulation: Pass the leather substrate coated with the foaming slurry through the coagulation tank, spray the coagulation liquid with a spray gun for coagula...

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PUM

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Abstract

The invention provides a water-based wet preparation method of genuine leather case leather, which comprises the following steps: Genuine leather base material processing, coating, coagulating, washing with water, drying and dry veneering; and the method intelligently solves the problems of difficult adhesion of water-based polyurethane foaming material on genuine leather and easy molding on the genuine leather, and also solves the problems of easy cracking and bubbling in case of agglomeration by the traditional water-based wet process; and the water-based genuine leather case leather is obtained through the method of coagulating with intermittent spraying coagulating liquid, washing with water, drying and transferring with dry veneering. A wear-resistant auxiliary agent and a water-basedhydrophobic agent are added to a water-based surface layer slurry system to improve the wear resistance and waterproof performance of the case leather. The water-based genuine leather case leather obtained by the method provided by the invention has the advantages of safety and environmental protection, soft hand feeling, excellent waterproof performance, and molding and wear resistance.

Description

technical field [0001] The invention belongs to the field of artificial leather production, and in particular relates to a method for preparing genuine leather luggage leather by an aqueous wet method. Background technique [0002] Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as its substitute material. Usually, the impregnated non-woven fabric is used as the mesh layer, and the microporous polyurethane layer is used as the grain layer. Both the front and back are very similar to leather, and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. Synthetic leather occupies a very important position in human's daily life and is widely used in the production of luggage, clothing, footwear and car interior accessories. [0003] In the existing synthetic leather manufacturing, the polyurethane resin is diluted and added with wood powder or other fi...

Claims

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Application Information

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IPC IPC(8): C14C11/00C14C13/00
CPCC14C11/00C14C11/003C14C13/00
Inventor 戴家兵戴金伟李维虎王刚董永红刘靠靠赵曦
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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