Do you know the physical properties of pp nonwovens（A）?

Polypropylene is a non-toxic, odorless, odorless, milky white, highly crystalline polymer with a density of only 0.90--"0. 91g/rm. It is one of the lightest varieties of all plastics today. It is unchanged for water. The water absorption rate in water is only 0. O1%, the molecular weight is about 80,100,000. The formability is good, but the shortening rate is large (1% to 2.5%). The thick-walled products are easy to be sunken, and some dimensional precision is better. High parts, it is difficult to reach the request, the product profile is good gloss and easy to color.（PP non woven fabric factory）

Mechanical properties

Polypropylene has high crystallinity and regular structure, and it has excellent mechanical properties. The absolute value of the mechanical properties of polypropylene is higher than that of polyethylene, but it is still a low grade in plastic materials, and its tensile strength can only reach 30 MPa or slightly higher. Polypropylene（polypropylene non woven fabric manufacturer） with a higher isotactic index has higher tensile strength, but as the isotactic index progresses, the impact strength of the material drops, but it does not change after falling to a certain value.

Temperature and loading speed have a great influence on the toughness of polypropylene（polypropylene non woven vendor）. When the temperature is higher than the glass transition temperature, the impact damage is ductile fracture, brittle fracture below the glass transition temperature, and the impact strength value drops greatly. The forward loading speed increases the temperature at which the ductile fracture transitions to the brittle fracture. Polypropylene has excellent anti-corrugation properties, and its products can be bent 106 times at normal temperature without damage.

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