Water-proof air-permeable polyurethane synthetic leather and preparation method thereof

Abstract

The invention belongs to water-proof air-permeable polyurethane synthetic leather in the technical field of synthetic leather, comprising the following components by weight percent: 60-70% of polyurethane particles, 3-7% of lubricant, 1-3% of foaming agent, 4-8% of reconcile resin, 10-15% of calcium carbonate, 10-15% of sodium chloride the grain diameter of which is 100-200 meshes, and 1-3% of pigment. The preparation method of the invention comprises the following steps: feeding the materials into a blender, and evenly mixing the raw materials; placing into a banbury mixer, heating, plastifying; placing into a two-roller machine, gelling, homogenizing, filtering by a filter and extruding; placing into a calender, and pulling out into rubber fabric; placing into a laminator, and fitting with base fabric and shell fabric at the condition of heating and pressurizing; and placing into a foaming machine, decomposing and foaming at the high temperature, cooking in water for 10-24 hours at the temperature of 50-60 DEG C, changing water for 2-5 times, knurling and postprocessing. The beneficial effects of the invention are as follows: sodium chloride is added and then removed in preparation process, more extremely fine holes are generated, and the air permeability of the synthetic leather of the invention is enhanced.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, in particular to a waterproof and breathable polyurethane synthetic leather. Background technique [0002] Chinese patent No. is the manufacture method of the polyurethane artificial leather of 98100908.5, discloses a kind of polyurethane synthetic leather, has good mechanical property, but the breathability of above-mentioned synthetic leather can't reach good effect. If the artificial leather of the above invention is used to make clothes or shoes, the sweat cannot evaporate, causing very great discomfort to the user. Contents of the invention [0003] In order to overcome the deficiencies in the above technical aspects, the present invention provides a polyurethane artificial leather with good flexural strength, hardness, wear resistance and moisture resistance, and good waterproof and breathable performance. [0004] The present invention is achieved in the following manner. [...

AI Technical Summary

Problems solved by technology

[0002] Chinese Patent No. 98100908.5 discloses a method for producing polyurethane artificial leather, which discloses a polyurethane synthetic leather with good mechanical properties, but the air permeability of the above synthetic leather cannot reach a good effect

If the artificial leather of the above invention is used to make clothes or shoes, the sweat will not evaporate, which will cause great discomfort to the user.