Shoe Material -- Analysis Of Polyurethane Synthetic Leather Industry

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The development of industry is widely used in sofa, bags, shoes, clothing and other industries.

Polyurethane synthetic leather is generally divided into two types: wet process and dry process.

Wet polyurethane synthetic leather is similar to natural leather in structure. It has superior performance. It has good breathability, moisture permeability, smooth and full handle, excellent mechanical strength. Synthetic leather is the best substitute for natural leather.

Polyurethane synthetic leather (PU synthetic leather)

It has luster, soft, natural, soft handle and strong sense of appearance.

It also has excellent properties such as abrasion resistance, cold resistance, flexural resistance, and easy processing.

The wet process is to add polyurethane to the DMF solution, add various auxiliaries, make slurry, dip or coat it on the base cloth, then put it in water with affinity with DMF, but not with polyurethane resin, DMF is replaced by water, and polyurethane resin gradually solidified, thus forming porous film, namely microporous polyurethane surface.

It is customarily known as Beth's pliteration (Bass), which means the meaning of the substrate, that is, the wet polyurethane semi finished leather. After finishing the surface of Beth, it can become the finished product of polyurethane synthetic leather.

China's synthetic leather industry is at a stage of pformation.

The industry has been in China for more than 30 years, and has become a pillar industry in many regions of China. However, in view of the large number of organic solvents used in the synthetic leather industry, serious air pollution and water pollution have been caused, which has seriously hindered the development of synthetic leather industry. The state has also promulgated relevant policies to guide industry standards and industrial upgrading. Synthetic leather gathering areas such as Wenzhou have begun to restrict the construction of traditional synthetic innovation factories, and shut down the relevant enterprises whose environmental protection is not up to standard, and the environmental upgrading of the industry is imperative.

Waterborne synthetic leather is one of the important directions in the environmental protection of synthetic leather industry, and is also the fastest growing one.

In the production process, besides the air pollution caused by the evaporation of some solvents, the pollution to the water is even more serious.

To solve the pollution problem of synthetic leather, it is the key to solve the pollution produced in the process of wet synthetic leather.