Production method of breathable leather

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...

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.

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