Preparing method of self-cleaning polyurethane synthetic leather with lotus effect

Abstract

The invention discloses a preparing method of self-cleaning polyurethane synthetic leather with a lotus effect. Polycarbon waterborne polyurethane surface-layer resin is taken as a carrier, closed-type aroma microcapsules and siloxane polymers with certain concentrations are dissolved and dispersed to form surface-layer pulp, and then the surface-layer pulp coats fluffy release paper of a lotus-leaf-simulation microstructure to prepare a wear-resistance controlled-release aroma dry-method surface layer with natural high-roughness factors; a low-pressure casting process is adopted, hydrolysis-resistance slow-resilience solvent-free polyurethane resin is adopted for preparing a foaming interlayer, and then microfiber base cloth fits the foaming interlayer to obtain the solvent-free polyurethane synthetic leather finished product. According to the prepared self-cleaning controlled-release aroma functional solvent-free polyurethane synthetic leather with the lotus effect, processes like dipping, rolling and spraying are not needed, the leather has a self-cleaning function, the process is efficient, environmentally friendly and clean, no DMF is left in the product, the leather is soft and smooth in hand feeling and generates a strong sense of genuine leather, the fragrance holding time of the leather is at least prolonged by 240 days compared with leather which is processed directlythrough essence, and the leather has the advantages of wear resistance, good hydrolysis resistance and other good physical properties.

Description

technical field [0001] The invention belongs to the technical field of polyurethane synthetic materials, and in particular relates to a preparation method of self-cleaning polyurethane synthetic leather with "lotus leaf effect". Background technique [0002] As a new type of material, polyurethane synthetic leather has soft and natural luster, soft hand feeling, strong leather appearance, high strength, flex resistance, anti-aging and other mechanical properties. It is an ideal substitute for natural leather and is widely used in Clothing, shoemaking, luggage, sofa furniture and other industries. However, synthetic leather products will inevitably be stained with oil, sweat and other dirt during wearing and use, and these dirt will bring a lot of inconvenience to people's lives when they are cleaned. At present, the conventional process in the industry to solve this problem is to coat a layer of dense coating material on the surface of synthetic leather by spraying, rolling...

AI Technical Summary

Problems solved by technology

However, most of the essences applied by roller coating are small molecules and volatile substances, which are easy to volatilize and lose as the temperature rises. Therefore, it is difficult to directly add fragrance to the leather surface by roller coating to meet the high-end market and new demands.