Performance Characteristics Of Polypropylene Fiber

(1) Light weight
The density of polypropylene fiber is 0.90-0.92 g/cm3, which is the lightest among all chemical fibers. It is 20% lighter than nylon, 30% lighter than polyester, and 40% lighter than viscose fiber, so it is very suitable for winter clothing. Filling or fabric for ski clothing, mountaineering clothing, etc.
(2) High strength, good elasticity, wear resistance and corrosion resistance
Polypropylene has high strength (the same in dry and wet conditions) and is an ideal material for manufacturing fishing nets and cables. It has good wear resistance and resilience. Its strength is similar to polyester and nylon. Its resilience is comparable to nylon and wool, and is better than polyester. Polypropylene fiber and viscose fiber are much larger; polypropylene fiber has poor dimensional stability, is prone to pilling and deformation, is anti-microbial, and does not suffer from moth; its chemical resistance is better than that of ordinary fiber.
(3) It has electrical insulation and warmth retention properties
Polypropylene fiber has a high resistivity (7×1019Ω.cm) and a small thermal conductivity. Compared with other chemical fibers, polypropylene has the best electrical insulation and warmth retention properties, but it is prone to static electricity during processing.
(4) Poor heat resistance and aging resistance
Polypropylene fiber has a low melting point (165~173°C) and poor stability to light and heat. Therefore, polypropylene fiber has poor heat resistance, aging resistance, and is not resistant to ironing. However, its anti-aging properties can be improved by adding anti-aging agents during spinning.
(5) Poor hygroscopicity and dyeability
The hygroscopicity and dyeability of polypropylene fiber are the worst among chemical fibers. It absorbs almost no moisture and its moisture regain is less than 0.03%. Fine-denier polypropylene has a strong wicking effect, and water vapor can be eliminated through the capillaries in the fiber. After being made into clothing, the comfort of the clothing is better, especially the ultra-fine polypropylene fiber. Due to the increased surface area, it can transfer sweat faster and keep the skin comfortable. Because the fibers do not absorb moisture and have low shrinkage, polypropylene fabrics are easy to wash and dry quickly.
Polypropylene has poor dyeability, light color, and poor dye fastness. Ordinary fuels cannot dye it, and most colored polypropylene is produced by dyeing before spinning. Dope coloring, fiber modification, and fuel complexing agent can be blended before melt spinning.