PP Non-woven fabric of various common properties
(1) Physical properties: pp Non-woven fabric for non-toxic, tasteless milky high crystalline polymer, is currently the most light of all plastic varieties, the water is particularly stable, in water 14h of water absorption rate is only 0.01%. Molecular weight about volume million, good formability. PP Nonwoven Fabric But because shrinkage rate is large, the original wall products are easy to sag, the product surface luster is good, easy coloring.
(2) Mechanical properties: pp Non-woven fabric with high crystallinity, structural regularity, and thus has excellent mechanical properties, its strength and hardness, elasticity are higher than high-density PE (HDPE). PP Nonwoven Fabric The outstanding characteristic is the flexural fatigue (7x10^7) secondary opening and closing of the bending without damage marks, dry friction coefficient and nylon similar, but in the oil lubrication less than nylon.
(3) Thermal properties: pp Non-woven fabric with good heat resistance, melting point in 164~170℃, products can be 100 ℃ above the temperature sterilization. Under the action of no external force, 150 ℃ also does not deform. Embrittlement temperature of 35 ℃, in less than -35℃ will occur embrittlement, PP Nonwoven Fabric heat resistance is inferior to PE.
(4) Chemical stability: pp Non-woven fabric with good chemical stability, in addition to acid erosion, other chemical reagents are relatively stable, but low molecular weight of aliphatic hydrocarbons, aromatic hydrocarbons, pp non-woven fabric softening and swelling, chemical stability with the increase in crystallinity has increased. Therefore, pp Non-woven fabrics suitable for the production of Russian chemical pipes and accessories, PP Nonwoven Fabric anti-corrosion effect is good.
(5) Electrical properties: Non-woven high frequency insulation performance, because it almost does not absorb water, so insulation performance is not affected by humidity, PP Nonwoven Fabric there is a higher dielectric coefficient, and with the temperature rise, can be used to produce heated electrical insulating products, breakdown voltage is also very high, suitable for electrical accessories. Anti-voltage, good arc resistance, but high electrostatic, and copper contact easily aging.
(6) Weatherability: Non-woven fabric is sensitive to ultraviolet rays, adding zinc oxide to propionic acid February gui fat, carbon black similar to the milky white filler can improve its anti-aging performance.