Difference between polypropylene filter cloth and polyester filter cloth
Polypropylene fiber is the trade name of polypropylene fiber. It is a fiber made of propylene as raw material through polymerization and melt spinning. Polypropylene fiber officially began industrial production in 1957, and is a rising star in synthetic fiber. Polypropylene fiber has the advantages of simple production process, low price, high strength and light relative density, so it develops rapidly. At present, polypropylene fiber is the fourth largest variety of synthetic fiber. The production of polypropylene fiber includes short fiber, filament and split film fiber. Polypropylene film fiber is made of polypropylene film, and then the film is stretched to make it split into a network formed by fibrils. Polypropylene fiber is widely used in manufacturing industrial fabrics and non-woven fabrics. Such as carpet, industrial filter cloth, rope, fishing net, building reinforcement materials, oil absorption blanket and decorative cloth. In civil use, polypropylene fiber can be pure spun or blended with wool, cotton or rayon to make various clothing materials. In addition, polypropylene film fiber can be used as packaging material. Main physical and chemical properties of polypropylene fiber
1. Shape: the longitudinal surface of polypropylene fiber is straight and smooth, and the cross section is circular.
2. Density polypropylene fiber has the advantage of light texture, and its density is only 0.91g/cm3, which is the lighter density variety among common chemical fibers. Therefore, polypropylene fiber with the same weight can obtain a higher coverage area than other fibers.
3. Strong stretch polypropylene fiber has high strength, elongation, high initial modulus and excellent elasticity. So polypropylene fiber has good wear resistance. In addition, the wet strength of polypropylene fiber is basically equal to the dry strength, so it is an ideal material for making fishing nets and cables.
4. Hygroscopicity and dyeability: the hygroscopicity of polypropylene fiber is very small, almost not hygroscopic, and the moisture regain under general atmospheric conditions is close to zero. However, it has wicking effect and can transfer water vapor through the capillary in the fabric, but it does not have any absorption effect. The dyeability of polypropylene fiber is poor and the chromatogram is not complete, but the method of original solution coloring can be used to make up for the deficiency.
5. Acid and alkali resistance: polypropylene fiber has good chemical corrosion resistance. In addition to concentrated nitric acid and concentrated caustic soda, polypropylene fiber has good resistance to acid and alkali, so it is suitable for use as filter material and packaging material.
6. Light resistance: polypropylene fiber has poor light resistance, poor thermal stability, easy aging, and is not resistant to ironing. But the anti-aging property can be improved by adding anti-aging agent during spinning. In addition, polypropylene fiber has good electrical insulation, but it is easy to generate static electricity during processing.