R&D (research and development) and production method of waterborne solvent-free polyurethane superfine fiber emulational leather

Abstract

The invention discloses an R&D (research and development) and production method of waterborne solvent-free polyurethane superfine fiber emulational leather. The leather is prepared by the following steps: bonding a waterborne polyurethane resin surface material and a middle material (bonding layers) and solvent-free polyurethane resin (A and B), and bonding an obtained layer and microfiber base with different thicknesses in a half-dry manner. According to the method, various difficulties in production of microfiber-related products and various problems in production technologies due to the limitation caused by the traditional out-dated production line and the traditional production technique and raw materials can be solved; a product produced by the method is smooth in surface without deadcrinkles, soft and elastic in hand feeling and extremely strong in dermic feeling and can meet the requirements of users and merchants on the product, so that the grade and the additional value of the product can be improved, and the foundation is laid for industrial upgrading and transformation of enterprises.

Description

technical field [0001] The invention relates to the technical field of preparation and production of synthetic leather, in particular to a research, development and production method of water-based solvent-free polyurethane microfiber imitation leather. Background technique [0002] At present, it is difficult to solve the problems of uneven surface of microfiber and uneven thickness of finished products with traditional production lines, production processes and raw materials. It is very difficult to make a bass with a wet line, and if you don't do it right, it will bubble. Direct dry veneer has problems such as uneven surface, poor adhesion, old people's lines, dead Zou, etc., and the thickness is very difficult to control. The leather feel, hand feeling and physical property indicators and environmental protection requirements are even more out of the question, which does not meet the needs of users and businesses for products. For this reason, we propose the developmen...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a research and development and production method of water-based solvent-free polyurethane microfiber imitation leather, which solves the problem that it is difficult to solve the problem of uneven surface of superfiber and uneven thickness of finished products with traditional production lines, production techniques and raw materials. It solves the problem that it is very difficult to make bass with wet method, and it will cause foaming if it is not done well; it solves the problems of direct dry method veneer, uneven surface, poor adhesion, old people's lines, dead Zou, etc., and the thickness very difficult to control

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