Introduction of various commonly used properties of PP non-woven fabrics

(1) Physical properties: PP non-woven fabric is a non-toxic, odorless, milky white, highly crystalline polymer. It is one of the lighter varieties of all plastics at present. It is particularly stable to water and has a water absorption rate of 14h in water.

 Only 0.01%. The molecular weight is between 80,000 and 150,000, and the moldability is good. However, due to the large shrinkage rate, the original wall products are easy to sag, the surface of the products is good in gloss, and easy to color.

(2) Mechanical properties: PP non-woven fabric has high crystallinity and regular structure, so it has excellent mechanical properties, and its strength, hardness and elasticity are higher than high density PE (HDPE).

  The outstanding feature is the resistance to bending fatigue (7×10^7). The secondary opening and closing is selected for bending without damage. The dry friction coefficient is similar to nylon, but it is not as good as nylon under oil lubrication.

(3) Thermal performance: PP non-woven fabric has good heat resistance, melting point is 164 ~ 170 ℃, products can be sterilized at a temperature above 100 ℃. Without being affected by external forces, it will not deform at 150℃.

  The embrittlement temperature is -35℃, embrittlement will occur below -35℃, and the heat resistance is not as good as PE.

(4) Chemical stability: PP non-woven fabric has good chemical stability, except for being corroded by acid, it is relatively stable to various other chemical reagents, but low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons, etc.

 It can soften and swell PP non-woven fabrics, and the chemical stability increases with the increase of crystallinity. Therefore, PP non-woven fabric is suitable for the production of Russian-Chinese chemical pipelines and fittings, and has good anti-corrosion effect.

(5) Electrical performance: The high-frequency insulation performance of non-woven fabrics is excellent. Because it hardly absorbs water, the insulation performance is not affected by humidity, has a high dielectric coefficient, and increases with temperature.

 It can be used to make heated electrical insulation products with high breakdown voltage and is suitable for electrical accessories. It has good resistance to voltage and arc, but it has high static electricity and is easy to aging when contacted with copper.

(6) Weather resistance: The non-woven fabric is very sensitive to ultraviolet rays. Adding zinc oxide thiopropionate dilaurate, carbon black-like milky white filler, etc. can improve its aging resistance.