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Production method of breathable leather

A production method and technology of air-permeable leather, applied in the direction of chemical instruments and methods, layered products, textiles and papermaking, etc., can solve the problems of difficult to achieve hydrolysis resistance, poor hydrolysis resistance, high content of dimethylformamide, etc., to avoid Poor environmental pollution and hydrolysis resistance, lower production cost, and increased perspiration function

Active Publication Date: 2014-07-02
ZHEJIANG SHENTENG COATED FABRICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above traditional process has the problem of poor environmental protection. The products produced by the above traditional process have high content of dimethylformamide in wet process bass, poor hydrolysis resistance, poor air permeability, unsatisfactory hand feeling, poor imitation leather effect, and comfortable fabric. Problems and shortcomings such as high temperature and perspiration function can not meet the satisfaction of end consumers
[0003] There are also other methods of making air-permeable leather now, as disclosed on December 11, 2013, in the Chinese patent whose publication number is CN103437197A, a water-based air-permeable leather is disclosed, and this water-based air-permeable leather is made by a dry transfer film processing method , including the following steps: coating a water-based polyurethane resin slurry surface layer on the release paper, performing mid-wave infrared heating and hot air drying, then coating the bottom adhesive layer, bonding the leather base cloth, performing mid-wave infrared heating and hot air drying Drying, cooling and rolling to make finished products, this processing method replaces solvent-based polyurethane with water-based polyurethane and is used in synthetic leather. Although it can solve the problem of DMF residue and VOC pollution, the products processed by this method are difficult to achieve ideal hydrolysis resistance.
[0004] At present, there is no production method of air-permeable leather that does not pollute the environment during the production process, can solve product air permeability, increase product perspiration function, and enhance product comfort.

Method used

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  • Production method of breathable leather

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Effect test

Embodiment 1

[0023] see figure 1 , The production method of air-permeable leather in this embodiment includes the following steps in sequence.

[0024] ① The batching room prepares the slurry according to the technical formula sheet and the order quantity of 1000 meters. The slurry is composed of polyurethane resin and color chips, and the weight ratio of polyurethane resin and color chips is 100:1.2. Adjust the viscosity of the slurry and mix the slurry The viscosity of the material is adjusted to 1500cps, and the color water refers to the customer's sample. Step?? provides raw materials for step??. The slurry used is simple in composition and scientific in proportion, which can effectively improve the air permeability and hydrolysis resistance of leather, with remarkable effect.

[0025] ②The PU production line selects the required release paper according to the customer's requirements, sets the drying temperature to 100°C, and then coats the release paper, that is, coats the slurry on ...

Embodiment 2

[0032] see figure 1 , The production method of air-permeable leather in this embodiment includes the following steps in sequence.

[0033] ① Prepare the slurry, which is composed of polyurethane resin and color chips, and the weight ratio of polyurethane resin and color chips is 100:1.2, and adjust the viscosity of the slurry to 1500cps.

[0034] ②Put the release paper on the PU production line. The release paper is conveyed at a linear speed of 15.8m / min. First, the release paper is dried at a temperature of 100°C, and then the slurry is coated on the release paper. Then dry at 140°C, cool to 5-8°C, and then wind up at a linear speed of 15.8m / min to obtain a semi-finished product. The surface of the semi-finished product is breathable. , the gas pressure on the front of the semi-finished product is not less than 0.25kg.

[0035] ③ Use a three-plate printing machine to print patterns and gloss on the dry surface of the release paper, and roll it after cooling. The linear spe...

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Abstract

The invention relates to a production method of breathable leather. The condition that in a production method of the breathable leather, environment pollution in the production process is free and the problem of product breathability is available can be solved at present can not be splved. The production method comprises the following steps: (1) preparing a sizing agent, wherein the sizing agent consists of polyurethane resin and color chips in a weight ratio of 100:1.2, and the viscosity of the sizing agent is adjusted to be 1500cps; (2) mounting release paper onto a PU (Polyurethane) production line, firstly, drying the release paper at 100 DEG C, subsequently coating the release paper with the sizing, and furthermore, drying at 140 DEG C so as to obtain a half-finished product; (3) printing a dry method surface layer of the release paper with patterns and glossiness by using a three-edition printing machine; (4) compounding the release paper with a piece of base cloth by using a binding agent; and (5) washing in water by using a graining machine; and (6) inspecting to be qualified to obtain a breathable leather product. By adopting the production method, the product breathability can be solved.

Description

technical field [0001] The invention relates to a production method of air-permeable leather, which is mainly used as furniture fabrics such as sofas and seats. Background technique [0002] The existing PU products are formed by coating the wet-laid surface layer (including dimethylformamide) on the textile base fabric on the wet-laid line (adjust the physical properties and thickness according to customer requirements), and the product produced in this way is called wet-laid bass. The batching room adjusts the slurry and color according to the technical formula. The PU production line selects the required release paper pattern according to the customer's requirements, and then coats (slurry) on the release paper. The French surface layer is bonded, and finally dried, cooled and rolled, and the product produced is a semi-finished coated fabric. The three-plate printing machine transfers the printing cylinder and processing wheel according to the pattern and gloss of the cu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14B32B37/00
Inventor 刘齐松
Owner ZHEJIANG SHENTENG COATED FABRICS
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