PP

Polypropylene (PP)

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Plastic

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产品描述

Overview

Polypropylene is chemically stable as a semi-crystalline resin. The higher the crystallinity, the higher the softening point and thermal deformation temperature, rigidity, tensile strength, modulus and hardness of the resin, as well as other mechanical properties. It is brittle when it is close to zero.

Polypropylene homopolymer: It is polymerized from a single propylene monomer, with high crystallinity, good mechanical strength and heat resistance.

Polypropylene copolymer: It is a copolymer of propylene and ethylene with high impact strength. It can be divided into two types: random copolymer and block copolymer.

The relative specific gravity of pure resin is 0.9, the glass transition temperature is -20℃, the melting point is 165~170℃, the long-term use temperature is up to 125℃, and the decomposition temperature is >300℃

Characteristic

Advantage

◆ Thermal stability
◆ Anti-acid and alkali corrosion, anti-solubility
◆ Easy to process
◆ Low water absorption
◆ Fatigue resistance
◆ Good electrical insulation

Disadvantage

◆ Low temperature brittleness
◆ Large shrinkage
◆ Poor dimensional stability
◆ Poor spraying and electroplating
◆ Easily decomposed by ultraviolet light
◆ Easy to age
◆ Poor resistance to aromatic hydrocarbons (such as benzene) solvents and chlorinated hydrocarbons (carbon tetrachloride) solvents

Variety

● Glass fiber reinforced

● Carbon fiber reinforced

● Mineral filling

● Flame retardant

● Shock proof

● Antistatic

● High temperature resistance

● UV resistant

Typical physical data

Properties
Material label
proportion
Tensile Strength
Flexural modulus
Izod notched impact strength
Heat Deflection temperature (4.6Kg/cm²)
Mold shrinkage (MD)3.2mm
Flammability