Waterborne polyurethane resin superfiber leather and manufacturing method thereof

Abstract

The invention relates to polyurethane resin superfiber leather and a manufacturing method thereof, belonging to the technical field of manufacturing methods. The manufacturing method is characterized by comprising the steps of sea-island fiber, non-woven fabrics, polyvinyl alcohol impregnation or hot-pressing and ironing out, original cloth processing, impregnation and coating of polyurethane, thermal coagulation, reduction amount of base, basic cloth, dyeing or embossment of grinding surfaces and inspection and warehousing. The polyurethane resin superfiber leather can be obtained by using the method. Compared with solvent type polyurethane, the waterborne polyurethane resin superfiber leather has equivalent physical properties, accords with application requirement, uses the environment-friendly polyurethane resin and has no organic solvent harmful to the environment; a DMF reclamation step is required by solvent type products in the production process so as to simplify the production process; and the polyurethane resin superfiber leather is energy-saving and environment-friendly, meets the limiting requirement on an environment-friendly polyurethane synthetic leather at abroad, reduces the demand quantity of producers, the harm to the producers as well as the production cost and has strong market competitiveness.

Description

1. Technical field [0001] The invention relates to a polyurethane resin synthetic leather and a manufacturing method, belonging to the technical field of synthetic leather and its manufacturing method. 2. Background technology [0002] At present, after years of development, polyurethane synthetic leather is widely used in various industrial and civil fields because of its good appearance and feel, breathable moisture permeability, solvent resistance, convenient application, and many varieties of colors. However, in the production of traditional polyurethane (PU) synthetic leather, solvent-based PU resin is used as the base layer and surface layer of leather products. This type of PU resin is based on toluene, xylene, acetone, butanone (MEK), Acetic acid, ethyl ester and dimethylformamide (DMF) etc. are used as the main solvents to obtain by polymerization. Solvent-based polyurethane emits a large amount of organic solvents during the production process. These solvents have...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to improve the pollution in the production process of synthetic leather, and to meet the domestic and foreign market demand for non-polluting polyurethane microfiber leather products, to provide a water-based polyurethane resin superfine fiber leather with high physical properties and environmental protection without using organic solvents. and manufacturing method