亚洲äV无码精品久久久久成精品

1. The longitudinal profile of polypropylene is smooth and smooth.2. Density of polypropylene is the biggest advantage of the texture is light, the density of only 0.91g / cm3 is the most common chemical fiber density of the lightest species, so the same weight of polypropylene than other fibers can be obtained by the higher plane or The surface of the object is large.

3. Strong tensile strength of polypropylene, elongation, the initial modulus is higher, excellent flexibility. So good wear resistance of polypropylene. In addition to this, the wet strength of polypropylene is basically equal to dry strong, so it is the production of fish net, cable aspiring material.4. Hygroscopic and dyeing properties of light insulation is good; almost no moisture, but the suction capacity is very strong, hygroscopic and perspiration effect; polypropylene hygroscopicity is very small, almost no moisture, the general atmosphere under the premise of moisture regain close to zero. But it has a wicking action, can pass through the capillary phenomenon in the process of informing the water vapor, but no matter what the role of their own reception. Polypropylene dyeing is poor, incomplete chromatography, but can accept the liquid coloring method to fill the lack of.5. Acid and alkali resistance of polypropylene has good resistance to chemical corrosion, in addition to concentrated nitric acid, concentrated caustic soda, the acrylic acid and alkali resistance when the performance is outstanding, so suitable for filtration materials and packaging materials.6. Light resistance and other lightfastness of polypropylene is poor, the heat does not change the gender is also poor, easy aging, intolerant ironing. But can pass through the process of adding anti-aging agent in the spinning, to improve its anti-aging properties. In addition, the polypropylene insulation of the outstanding, but easy to produce static electricity.7. High strength polypropylene fiber strength second only to nylon, but the price is only nylon 1/3; made of fabric size unchanged, wear elasticity is correct, the chemical does not change the gender is good. But the heat does not change the gender difference, intolerant sun, easy to aging fragile, this is often added in the anti-aging agent in polypropylene.