Preparation method for waterborne polyurethane synthetic leather Bass

Abstract

The invention discloses a preparation method for a waterborne polyurethane synthetic leather Bass. The method comprises the following steps of: adding a dispersing agent, a polypropylene powder and a talcum powder to waterborne polyurethane under a stirring condition; after sufficiently dispersing these materials, adding a thickening agent to these materials to stir the materials, so as to obtain a waterborne polyurethane synthetic leather paste; before coating, adding a foam stabilizer to the waterborne polyurethane synthetic leather paste under a stirring condition; bubbling the paste by using compressed air, wherein the bubbling speed is 0.2-0.8 m3 / h; and stirring and bubbling the paste for 5-10 minutes at a speed of 600-1000 rpm; and then coating a waterborne polyurethane synthetic leather foaming paste to a base fabric, which is treated by a base fabric treating liquid and ironed by an ironing roller, wherein the coating quantity is 300-600 g / m2; and finally, drying the waterborne polyurethane synthetic leather foaming paste, so as to obtain the waterborne polyurethane synthetic leather Bass. According to the invention, a foaming material has the advantages of rapidness in foaming and good foam stabilizing property; and the preparation method disclosed by the invention has the advantages of simplicity, easiness and easiness for continuous production and is very suitable for large-scale industrial production.

Description

technical field

[0001] The invention relates to a preparation method of water-based polyurethane synthetic leather base, belonging to the technical field of water-based polyurethane synthetic leather preparation. Background technique

[0002] Traditional synthetic leather bass production mainly adopts wet method and dry method, but both use solvent-based polyurethane as the basis, and use DMF and other organic compounds as solvents, which not only pollute the environment, but also endanger the health of production workers.

[0003] The polymer chain of water-based polyurethane can make the resin have multiple functions: water resistance, solvent resistance, abrasion resistance, scratch resistance, wrinkle resistance, moisture permeability, air permeability and hand feeling are all better than those made of solvent-based resin Synthetic leather is closer to real leather. The use of water-based polyurethane resin to produce synthetic leather not only meets international envir...