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Polypropylene isotactic mini trp.png
IUPAC name poly(propene)
Other names Polypropylene; Polypropene;
Polipropene 25 [USAN]; Propene polymers;
Propylene polymers; 1-Propene; [-Ch2-Ch(Ch3)-]n
CAS number 9003-07-0
Molecular formula (C3H6)n
Density 0.855 g/cm3, amorphous

0.946 g/cm3, crystalline

Melting point

130 to 171 °C, Expression error: Unrecognized word "to". K, Expression error: Unrecognized word "to". °F

Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Polypropylene (PP), or polypropene, is a type of plastic. It is a thermoplastic polymer which can be made into a fibre for yarn and fabric, film for packaging, or many other shapes.

As a plastic it can be made translucent but usually is opaque and often brightly colored. It is tough, and resists many solvents, acids and bases.

It can be formed into a thin thread and woven into a strong strap, often used on backpacks, bags, and other things.

In 2008, the global market for polypropylene had a volume of 45.1 million metric tons, which led to a turnover of about $65 billion (~ €47.4 billion).[1]