国产午夜精品福利久久_日韩成人午夜精品_亚洲第一成人在线观看_亚洲天堂黄色网站B性爱_亚洲精品人成网在线观看_美女131黄的全部免费_日本一区二在线播放_国产高清成人吃奶成免费视频_日韩一级二级三级_亚洲系列在线播放

What is a softener? Softener composition and formula!

Softener, also known as softener, is an additive used to improve the processing and use performance of textiles, rubber products, leather, paper, etc. It can increase the plasticity of the rubber compound, reduce the viscosity of the rubber compound and the temperature during mixing, improve the dispersion and mixing, and improve the tensile strength, elongation and wear resistance of the vulcanizate.

The function of softeners and plasticizers is generally similar, but the plasticizers are made by chemical synthesis, mainly used for resins and plastics, while the softeners are mostly from natural substances, almost all of which are used for rubber.

Chemical softener composition:

Chemical softener can cut off the molecular chain of a few rubber hydrocarbons and is a weak plasticizer. Physical softeners mainly weaken the intermolecular force of rubber hydrocarbons and act as lubricants.

Physical softener composition:

① Petroleum series softener is mainly a complex mixture composed of alkanes, cycloalkanes, aromatics, a small amount of asphalt, nitrogen-containing organic bases, etc.

② Coal tar series softeners include coal tar, coumarone resin and coal tar pitch.

③ Fatty oil softeners are natural oils and their derivatives, such as vegetable oils, fatty acids and ointments.

④ Turpentine series softeners are products obtained from rosin, such as pine tar, rosin, tall oil, wood asphalt, etc.

Features of softener formula:

1. Good compatibility and compatibility with rubber, without affecting the physical and mechanical properties of adhesive and sealant;

2. High boiling point, non-volatile, non-exudative, stable chemical properties;

3. It is non-toxic, tasteless and odorless, and fully meets the environmental protection requirements;

4. The source of raw materials is sufficient and the cost is relatively low;