Method for producing water-based polyurethane synthetic leather

Abstract

The invention relates to a method for manufacturing water-based polyurethane synthetic leather. The designed technological process comprises the steps of preparing base fabric, humidifying and arranging the base fabric, coating water-based sizing agent, acid-releasing, solidifying, forming, washing, drying and sizing. The method has the advantages that no solvent is added, the organic contamination is thoroughly eliminated from the source, the potential safety hazards are eliminated, the working environment of workers is improved, and green and environment protective cleaning production is achieved indeed; the performances of a product is close to or superior to those of a solvent type product in appearance, structure, hand feeling and physical property, and the product is the best substitute for the solvent type product as well as a mainstream product of synthetic leather field development in the future.

Description

technical field [0001] The invention relates to a polyurethane synthesis technology, in particular to an environment-friendly preparation method of water-based polyurethane synthetic leather, which belongs to the field of chemical synthesis. Background technique [0002] In the current environment where the country requires energy conservation and emission reduction, it is the general trend to develop products that replace solvent-based polyurethane. The water-based polyurethane uses water as the dispersion medium, which is non-toxic and harmless, and does not add any organic solvents during the entire water-based tanning production process, which will not cause a burden on the environment. The need for healthy and sustainable development. [0003] At present, water-based polyurethane synthetic leather is mostly produced by water-based mechanical foaming, while ultra-fine fiber synthetic leather is still mainly produced by solvent-based dry and wet methods. Water-based mech...

AI Technical Summary

Problems solved by technology

[0003] At present, water-based polyurethane synthetic leather is mostly produced by water-based mechanical foaming, while ultra-fine fiber synthetic leather is still mainly produced by solvent-based dry and wet methods. Water-based mechanical foaming is used to manufacture polyurethane synthetic leather. The ingredients and process steps are slightly different. It is cumbersome and takes a long time, and mechanical foaming is easy to produce uneven cells. It is more difficult to control the foaming effect and product quality for large-scale products; and the use of solvent-based dry and wet manufacturing Synthetic leather will cause a lot of pollution due to the use of organic solvents. Although there are organic solvent recovery devices, some organic solvents cannot be recovered, which will bring serious harm to the workers and the environment.

Images