The chemical molecules of polypropylene yarn are also very different, which are composed of PP fibers. PP has good heat resistance, and the product can be read at a temperature above 100°C, and will not deform at 150°C under the condition of no external force. The embrittlement temperature is -35℃, and embrittlement will occur below -35℃, and the cold resistance is not as good as polyethylene. The reported value of the glass transition temperature of polypropylene is 18qC, 0qC, 5℃, etc. This is also because people use different samples, which contain different ratios of the crystalline phase to the amorphous phase, which makes the chain length of the amorphous part of the molecular chain different. Caused by. The melting temperature of polypropylene is about 40-50 higher than polyethylene, which is about 164-170℃, and the melting point of 100 isotactic polypropylene is 176℃.

     It is relatively stable to other chemical reagents, but low-molecular-weight aliphatic hydrocarbons, aromatic hydrocarbons, and road hydrocarbons can make polypropylene swell and swell. At the same time, its chemical stability increases with the increase in crystallinity, so Polypropylene is suitable for making various chemical pipelines and fittings, and has good anti-corrosion effects. It is because of so many good advantages that polypropylene yarn is playing more and more roles and the market is getting bigger and bigger. Regarding the introduction of polypropylene yarn, let's start with some of its features. The advantage of polypropylene yarn is its light texture. Its density is only 0.91g/cm3, which is a light-density variety among common chemical fibers. Therefore, polypropylene fiber with the same weight can obtain a higher coverage area than other fibers. Strength and elongation Polypropylene has high strength, large elongation, high initial modulus and excellent elasticity.

Fujian Jinquan Chemical Fiber Products Co., Ltd. mainly produces: polypropylene regenerated yarn, polypropylene hollow yarn, pp yarn, polypropylene light body yarn, polypropylene yarn and other products. 20 polypropylene FDY production lines and some supporting equipment. It mainly produces polypropylene regenerated yarns, polypropylene colored yarns, and polypropylene hollow yarns of various types from 300D to 1200D, with an annual output value of about 7,000 tons.