The properties of polypropylene
Some artificial silk thread wholesale Xiaobian to introduce the properties of polypropylene
The scientific name of polypropylene fiber, near the flame melting shrinkage, flammable, away from the fire burns slowly and black smoke, flame at the upper end of the yellow, blue at the end, emitting a smell of oil, after burning ashes for hard round shallow brown particles, hand twist fragile.
Physical property
The flat surface morphology of polypropylene 1 longitudinal smooth, round section.
2 the density polypropylene biggest advantage is light texture, its density is only 0.91g/cm3 is the density of the lightest of common chemical fiber varieties, so the same weight polypropylene can be rather than other fibers of high coverage area.
Polypropylene stretch 3 strong high strength, high elongation, initial modulus of elasticity, excellent. So the good wear resistance of polypropylene. In addition, polypropylene wet strength is substantially equal to dry, so it is an ideal material for making nets, cable.
4. Hygroscopicity and dyeing properties of light warm, almost no moisture absorption, but wicking ability strong, wicking effect is obvious; hygroscopicity of polypropylene fiber is very small, almost non hygroscopic, general atmospheric conditions regain is close to zero. But it has a core absorption, can pass through the capillary tube in the water vapor, but itself can not afford to absorb any. The dyeing properties of polypropylene is poor, chromatography is not complete, but can be used to compensate for the lack of spundyed.
5. Acid and alkali resistant polypropylene has good resistance to chemical corrosion, in addition to concentrated nitric acid, concentrated caustic soda, polypropylene with acid and alkali resistance performance is good, therefore is suitable for the used as filtering materials and packaging materials.
6 light of polypropylene lightfastness poor, poor thermal stability, easy to aging, not ironing. But it can be improved by adding anti - aging agent in the spinning. In addition, polypropylene good electrical insulation, but the processing is easy to produce static electricity. Due to the low thermal conductivity of polypropylene, warm and good.
7. High strength polypropylene stretch yarn strength is second only to that of the nylon, but the price is only a third of the nylon; the fabrics made of the size stability, good wear-resistant elastic, chemical stability. But the poor thermal stability, not resistant to sunlight, easy aging damage, so often in polypropylene adding anti-aging agent.
