Polypropylene is the Chinese trade name of isotactic Polypropylene fibre, and the foreign trade name is Meraklon. Isotactic polypropylene fibers are referred to as polypropylene fibers.
Physical and chemical properties of polypropylene
* Density, strength Polypropylene has a particularly light texture with a density of only 0.91g/cm3, which is lighter than water and only 60% of cotton. It is the lightest fiber of all synthetic fibers. The strength of the fiber is relatively high, the short fiber is 35.2-52.8 cN/tex, and the filament is 44-70.4 cN/tex, which is close to nylon and polyester, and the strength is not lowered especially after wetting.
* Hygroscopic polypropylene has a low hygroscopicity and is hardly hygroscopic, so its shrinkage rate is small. The resident agency acts as a sterile gauze with the advantage of non-adhesive wounds.
* Chemical stability It has good chemical resistance and is stable to concentrated sulfuric acid, hydrochloric acid and caustic soda at room temperature.
* Other properties: Polypropylene has poor heat resistance and light resistance. After 6 months of exposure to sunlight, the strength is reduced by 50%. The dyeing performance of polypropylene is poor. Generally, dyes are not easy to dye, and are currently limited to dyed in light colors. Medium color, its color fastness is also poor.
Use of polypropylene High strength (72.5-76.0 cN/tex) polypropylene multifilament and silk are ideal materials for ropes, fishing nets and cables; low strength (18-25 cN/tex) polypropylene is easy to cut, ideal for cigarette filters Alternative materials; ordinary polypropylene as a fiber, good thermal insulation, good moisture permeability (regain moisture <0.03%), no cold feeling for underwear, its shortcomings are poor dyeing, rough feel, waxy. However, fine denier (thinness less than 1.9 dtex) is soft to the touch and has no obvious waxy feel. Polypropylene can be blended with a variety of fibers to make different types of confusion. Non-woven fabrics can be made into shirts, outerwear, sportswear, socks, etc. after knitting. The floc made of polypropylene hollow fiber is light in weight, warm and has good elasticity. In addition, polypropylene can also be used to make carpets, upholstery fabrics, furniture fabrics, strips, oil absorbing felts, building reinforcements, packaging materials and industrial filter cloths, bag fabrics, etc.
Properties of polypropylene blended fabrics Polypropylene blended fabrics have good fastness and wear fastness, small shrinkage, easy to wash and dry, good dimensional stability, and relatively stiff. However, the heat resistance is poor, it is not suitable for comforting. If you want to comfort, the temperature should not exceed 100 °C. It should not be soaked in boiling water. It should be washed with cold water or low temperature water. It has poor light resistance and can not be exposed in the hot sun. It has a stuffy feeling when worn, and has poor dyeing performance.
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