There are two main types: homopolymers and copolymers. Copolymers are further divided into block copolymers and random copolymers. Each category has unique applications. PP is often referred to as the "steel" material of the plastics industry, because it can add additives to PP or be manufactured in a unique way to modify and customize PP to meet unique application requirements.

PP for general industrial use is a homopolymer. Block copolymer PP is added with ethylene to improve impact resistance. Random copolymer PP is used to make more ductile and transparent products.

How is PP made?
Like other plastics, it starts from the "fractions" (lighter groups) formed by the distillation of hydrocarbon fuels and combines with other catalysts to form plastics through polymerization or condensation reactions.

What are the advantages of PP?
PP is easily available and relatively cheap.
PP has high flexural strength.
PP has a relatively smooth surface.
PP is moisture-proof and has low water absorption.
PP has good chemical resistance in various acids and alkalis.
PP has good fatigue resistance.
PP has good impact strength.
PP is a good electrical insulator.

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