[introduction to polypropylene fiber]
Polypropylene fiber is the product name of polypropylene, which is made from propylene by polymerization and melt spinning. The production of polypropylene, which officially began in 1957, is a rising star in synthetic fibers. Because of the simple production process of polypropylene, low price, high strength, relatively low density and other advantages, polypropylene develops rapidly. Currently, polypropylene is the fourth largest variety of synthetic fibers.
The production of polypropylene consists of short fibers, filament, and split-film fibers. The polypropylene film is made of polypropylene, which is then stretched to split into a network of the original fiber. Polypropylene is used in manufacturing industrial fabrics, non-woven fabrics, etc. Such as carpet, industrial filter cloth, rope, fishing net, building reinforced material, oil absorbing blanket and decorative cloth. On the civil side, polypropylene can be spun or blended with wool, cotton or viscose to make a variety of materials. In addition, polypropylene film fiber can be used as packaging material.
The main physical and chemical properties of polypropylene
1. The longitudinal plane of the shape polypropylene is straight and smooth, with a circular section.
2. The biggest advantages of density polypropylene texture light, its density of 0.91 g/cm3 is a common chemical fiber density the lightest varieties, so the same weight of polypropylene higher coverage than other fibers.
3. High tensile strength, high tensile strength, high initial modulus and excellent elasticity. So polypropylene wear well. In addition, the wet strength of polypropylene is basically equal to dry, so it is the ideal material for making nets and cables.
4. Hygroscopic and chromic polypropylene absorbability is very small, almost non-hygroscopic, and the moisture regain in general atmospheric conditions is close to zero. But it has a wick, which passes through the capillary in the fabric, but can't absorb any of it. The chromaticity of polypropylene is poor, the chromatogram is not full, but can use the method that the liquid colorization is used to make up the deficiency.
5. Acid and alkali resistance Polypropylene has good resistance to chemical corrosion resistance, in addition to the concentrated nitric acid, concentration of caustic soda, polypropylene fiber on the acid and alkali resistance performance is good, so is suitable for used as filtration materials and packaging materials.
6. Light resistance is poor in light resistance, poor thermal stability, aging and ironing. But the anti-aging properties can be improved by adding anti-aging agent to the spinning. In addition, the electric insulation of polypropylene is good, but easy to produce static electricity when processing.