What is the chemical properties of PP yarn?

The chemical molecules of PP yarns are also very different and are composed of PP yarns.

PP yarn has good heat resistance, and the product can be sterilized at temperatures above 100 °C. Under the condition of no external force, it is not deformed at 150 °C, the embrittlement temperature is -35 ° C, and it will be lower than -35 ° C. Embrittlement occurs, cold resistance is not as good as polyethylene. For the reported glass transition temperature of polypropylene, there are 18qC, 0qC, 5°C, etc. This is also because people use different samples, and the proportion of crystal phase and amorphous phase is different. The chain length of the amorphous portion in the molecular chain is different.

The melting temperature of PP yarn is about 40-50% higher than that of polyethylene, about 164-170 ° C, and the melting point of 100% isotactic PP yarn is 176 ° C. Polypropylene has good chemical stability. Besides being attacked by concentrated sulfuric acid and concentrated nitric acid, it is stable to various other chemical agents, but low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons can soften polypropylene and Swelling, while its chemical stability increases with the increase of crystallinity, so polypropylene is suitable for making various chemical pipes and fittings with good anti-corrosion effect.

It is because there are so many good points that the role of PP yarns is increasing and the market is getting bigger and bigger.

Dongguan Donggang Chemical Fiber Co., Ltd. has 16 polypropylene filament production lines, which has formed an annual production capacity of 20,000 tons of polypropylene yarn, and has become the designated supplier of world famous luggage such as NIKE and YSL.