Polypropylene fiber (PP fiber) has the following main properties:
Physical properties: The breaking strength of polypropylene fiber is 2.6-5.7cN/dtex, the elongation at break is 20-80%, the initial modulus is 18-35cN/dtex, the density is 0.90-0.91g/cm³, and the melting point is 163-175℃. It is light in weight and the lightest among all chemical fibers, 20% lighter than nylon, 30% lighter than polyester, and 40% lighter than viscose fiber.
Mechanical properties: Polypropylene fiber has high strength and good elasticity, and is suitable for making materials such as fishing nets and cables. It has good wear resistance and resilience, and its rebound rate is comparable to that of nylon and wool.
Chemical properties: Polypropylene fiber has good chemical resistance and antimicrobial resistance, and is not easily corroded.
Thermal properties: Polypropylene fiber has a low melting point (165-173°C) and poor stability to light and heat, so its heat resistance and aging resistance are poor.
Electrical insulation and warmth retention: Polypropylene fiber has high resistivity and low thermal conductivity, and has good electrical insulation and warmth retention.
Other properties: Polypropylene fiber has extremely low hygroscopicity, almost no hygroscopicity, and poor dyeability, but it can be improved through special treatment.
Polypropylene fiber has a wide range of uses, mainly including the following aspects:
Building materials: Adding polypropylene fiber to concrete or mortar can significantly improve its crack resistance, impact resistance, wear resistance and freeze-thaw resistance, and extend its service life. It is suitable for waterproofing underground projects, roofs, walls, floors, pools, basements, roads and bridges in industrial and civil construction projects. Textiles: Polypropylene fiber is used to produce winter clothing such as mountaineering clothes and down jackets. Because of its light weight, warmth and electrical insulation, it is also suitable for filling materials for winter clothing.
Industrial Application: Used in the manufacture of carpets, geosynthetics, filters, oil absorbents, sound insulation materials, etc.
Healthcare: Used in the production of disposable medical and sanitary products such as surgical gowns, masks, diapers, etc.
Automotive Industry: Used in the manufacture of automotive parts such as battery separators.
Sports Equipment: Due to its light weight and warmth retention, it is also used in the manufacture of high-end sportswear and T-shirts, etc.