PP non-woven fabrics of various commonly used properties

(1) Physical properties: PP non-woven non-toxic, tasteless milky white crystalline polymer, is one of the lightest varieties of all plastics, water is particularly stable, water absorption in the water 14h only 0.01 %. Molecular weight of about 8 to 150,000, good formability. However, due to shrinkage rate, the original wall products easy to depression, product surface gloss, easy to color.

(2) Mechanical properties: PP non-woven fabric of high crystallinity, structured, which has excellent mechanical properties, its strength and hardness, high elasticity than high-density PE (HDPE) high. The salient feature is flexural fatigue resistance (7 × 10 ^ 7) times bending and bending without damage, the dry friction coefficient is similar to that of nylon, but it is inferior to nylon under oil lubrication.

(3) Thermal properties: PP non-woven fabric has good heat resistance, melting point 164 ~ 170 ℃, the product can be sterilized at temperatures above 100 ℃. In the absence of external forces, 150 ℃ nor deformation. Embrittlement temperature of -35 ℃, below -35 ℃ will occur embrittlement, heat resistance than PE.

(4) Chemical stability: PP non-woven fabric has good chemical stability, in addition to being acid erosion, the other chemical reagents are relatively stable, but low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons can make PP non-woven Cloth softening and swelling, chemical stability with the increase in the degree of crystallinity also increased. Therefore, PP non-woven fabric suitable for the production of Russian chemical pipelines and accessories, anti-corrosion effect is good.

(5) Electrical properties: Non-woven high-frequency insulation performance is excellent, because it is almost non-absorbent, so the insulation performance is not affected by humidity, high dielectric constant, and with the temperature rise, can be used to make heat The electrical insulation products, breakdown voltage is also high, suitable for electrical accessories. Anti-voltage, arc resistance is good, but high static electricity, contact with copper easy to aging.

(6) Weatherability: Nonwovens are very sensitive to ultraviolet light, and the addition of zinc lauryl zinc thiopropionate and similar white milky filler like carbon black can improve the anti-aging properties.