Author：Baby & Adult Diaper Materials FROM：Diaper Materials Manufacturer TIME：2023-03-02
PP non woven fabric refers to a fiber product made from PP (polypropylene) by melt spinning. Because polypropylene non woven fabric have many excellent properties, they are widely used in the three fields of decoration, industry and clothing. So, what aspects of performance does it have?
PP non woven fabric is very sensitive to ultraviolet rays, and the addition of zinc oxide dilauryl thiopropionate, and milky white fillers similar to carbon black can improve its aging resistance.
PP non woven fabric is a non toxic, odorless, milky white high crystalline polymer. It is one of the lightest varieties of all plastics. It is particularly stable to water. The water absorption rate in water for 14 hours is only 0.01%. The molecular weight is between 80,000 and 150,000, and the formability is good. However, due to the large shrinkage rate, the original wall products are easy to dent, the surface gloss of the products is good, and it is easy to color.
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 that of high density PE (HDPE). The outstanding feature is bending fatigue resistance, (7×10^7) times of opening and closing bending without damage marks, dry friction coefficient is similar to nylon, but not as good as nylon under oil lubrication.
PP non woven fabric has good heat resistance, the melting point is 164~170℃, and the products can be sterilized at temperatures above 100℃. Under the action of no external force, it will not deform at 150 °C. The embrittlement temperature is -35 °C, and embrittlement occurs below -35 °C, and the heat resistance is not as good as PE.
PP non woven fabric has good chemical stability. In addition to being eroded by acid, it is relatively stable to various other chemical agents, but low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons, etc. can soften and swell, and chemical stability increases with crystallization. The degree of increase has also increased. Therefore, it is suitable for the production of Russian Chinese chemical pipelines and accessories, and has a good anti corrosion effect.
PP non woven fabric has excellent high frequency insulation performance. Because it hardly absorbs water, the insulation performance is not affected by humidity, has a high dielectric coefficient, and can be used to make heated electrical Insulation products, the breakdown voltage is also high, suitable for electrical accessories and so on. It has good resistance to voltage and arc, but has high static electricity, and it is easy to age when it is in contact with copper.
Today, PP non woven fabric is widely used in various fields of life because of their excellent properties. By understanding the properties of polypropylene non woven fabric, we can further understand this fabric.
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