亚洲伊人久久大香线蕉AV,国产色无码精品视频免费,精品人伦一区二区三区潘金莲,亚洲精品国产V片在线观看

There are many kinds of PVC processing aids. When processing resin products, PVC processing aids are selected according to demand. What should be paid attention to in the application of PVC processing aids?

What is polymer processing aid? What is its role?

Light stabilizers have different functions due to their different structures and varieties.

The existing light stabilizer has the following deficiencies

Light stabilizer (English name: Light stabilizer; photostabilizer) is a polymer product

Haodafeng New Material Technology Co., Ltd. is a company engaged in the operation and technical service of plastic additives and additives, and is committed to providing new products, new formulations and application technologies to the industry and custo

Plastic additives are also called plastic additives

What is the function of oxidant? Oxidation refers to a stable process of substances or structures in oxidation state. Because oxidants can improve or reduce the chemical activity of some