Manufacture method for PU embossed color-changing decoration leather

Abstract

The invention provides a manufacture method for PU embossed color-changing decoration leather. According to the method, a layer of polyurethane work slurry prepared by using a wet method is coated onto a spunlaced non-woven fabric, and concrete steps of the method comprise: (a) preparing base cloth and unreeling and ironing the base cloth; (b) coating the polyurethane work slurry changeable at a pressure with a knife, wherein a formula for the work slurry comprises, by mass, 20 to 40 parts of high-modulus resin, 80 to 60 parts of low modulus resin, 90 to 200 parts of a solvent, 15 to 25 parts of a filling material, 3 to 15 parts of color paste, 0 to 4 parts of a microporous regulator, 0.1 to 1 part of an antifoaming agent and 0.1 to 1 part of a leveling agent; (c) carrying out solidification and rinsing; and (d) carrying out drying and reeling, wherein drying temperature is 120 to 155 DEG C. The prepared decoration leather has stiff and smooth touch, smooth surface and neat back; temperature for thermal changes of the decoration leather at a pressure is adjustable and is in a range of 165 to 180 DEG C; time for changes at a pressure is short; and the color of the decoration leather having undergone changes at a pressure is brilliant and full, presenting great contrast.

Description

technical field [0001] The invention relates to a method for manufacturing a PU embossed color-changing decorative leather, namely a method for manufacturing a PU embossed and color-changing decorative leather with adjustable pressure-transformation temperature, short pressure-transformation time, smooth surface, clean back surface and strong pressure-transformation color contrast. . Background technique [0002] The hot-pressing discoloration of PU (polyurethane) leather products is mainly a process in which the resin is softened at high temperature and then re-fused and changed. In this process, the wet-processed PU structure is softened by high temperature and re-fused after a certain pressure. When they come together, and the thickness becomes thinner, the color becomes darker, brighter and fuller due to the increase in the concentration of the pigment. [0003] The embossed and discolored decorative leathers already on the market have poor surface flatness, feel empty ...

AI Technical Summary

Problems solved by technology

[0003] The existing embossed color-changing decorative leather on the market has poor surface flatness, loose and flat hand feeling, weak color contrast after hot pressing (the color depth before and after pressure change is generally below 10), and the color is not bright enough. , Unclear texture after pressure deformation, high pressure deformation temperature and long pressure deformation time (generally, the pressure deformation temperature is above 180°C, and the pressure deformation time is generally above 10 seconds) and other shortcomings; in addition, the cleanliness of the back is not enough, causing bonding performance Poor, seriously affect subsequent processing performance

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