Polypropylene is available in both homopolymer and copolymer grades.
Homopolymer Polypropylene
Homopolymer polypropylene is stronger and stiffer than copolymer.
Copolymer Polypropylene
Copolymer polypropylene is a bit softer, but it is tougher and more durable than homopolymer polypropylene. Copolymer polypropylene tends to have better stress crack resistance and low temperature toughness than homopolymer polypropylene.
Advantage
> Easy to weld using thermoplastic welding equipment
> Low moisture absorption
> Good chemical resistance
> Extremely tough，The Shore D of RJ-SQ is 75~80;
> Excellent aesthetic properties
> Easy to fabricate
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