Environmental-friendly waterproof and breathable clothing leather and preparation method thereof

Abstract

The invention discloses environmental-friendly waterproof and breathable clothing leather and a preparation method thereof. The preparation method comprises the following steps: adding preparations such as a water-based thickening agent, a defoaming agent, a leveling agent, microporous filler and a curing agent into water-based polyurethane resin, and carrying out mixing and vacuum defoaming to form a water-based polyurethane resin slurry surface layer and bottom layer respectively; and by a processing method with dry-process film transferring, firstly coating release paper with the surface layer, then coating the release paper with the bottom layer after drying and cooling, drying at low temperature, then attaching base cloth at high temperature, drying, curing, cooling, stripping the release paper, bundling, and carrying out surface after-treatment, thereby obtaining the environmental-friendly waterproof and breathable clothing leather. The environmental-friendly waterproof and breathable clothing leather disclosed by the invention has the advantages that the problems of environmental pollution and residue of organic solvents for preparing existing clothing leather are solved, and the water-pressure resistance, the yellowing resistance, the waterproof effect, the breathable function and the like of the clothing leather are improved.

Description

technical field [0001] The invention belongs to the technical field of garment leather production technology, and in particular relates to an environment-friendly waterproof and breathable garment leather and a preparation method thereof. Background technique [0002] There are many kinds of leather garments with changeable styles. When people choose leather garments, they not only consider their fashion, but also pay more attention to the comfort and functionality of leather garments. At present, the widely popular leather garments in the market are made of artificial leather and synthetic leather. Due to the problems of poor air permeability, low temperature hardening, poor flex resistance, poor slip resistance, and long-term easy cracking of artificial leather, artificial leather has gradually become excellent in low temperature softness. , cold resistance, wear resistance, high elasticity and high gloss polyurethane (PU) synthetic leather instead. However, since polyure...

AI Technical Summary

Problems solved by technology

At present, the widely popular leather garments in the market are made of artificial leather and synthetic leather. Due to the problems of poor air permeability, low temperature hardening, poor flex resistance, poor slip resistance, and long-term easy cracking of artificial leather, artificial leather has gradually become excellent in low temperature softness. , cold resistance, wear resistance, high elasticity and high gloss polyurethane (PU) synthetic leather instead

However, since polyurethane synthetic leather is coated with solvent-based polyurethane slurry, a large amount of organic solvents such as dimethylformamide (DMF) and toluene are used in the preparation process, and these organic solvents will remain in clothing leather products. Slowly volatilizes over time, causing great harm to human health

In addition, solvent-based polyurethane coatings also have problems such as poor yellowing resistance, low water pressure resistance, poor waterproof effect, and poor air permeability.

Chinese patent 200810107274.5 proposes a polyurethane resin for waterproof and breathable clothing leather. By washing away the inorganic substance potassium chloride in the resin, the polyurethane film forms a large number of micropores, thereby obtaining high moisture permeability and high water pressure resistance. The resin still contains 63-75% dimethylformamide organic solvent, which cannot meet the environmental protection requirements