Polypropylene is an economical material that offers a combination of outstanding physical, mechanical, thermal, and electrical properties not found in any other thermoplastic. It has low moisture absorption, is resistant to staining, and has a light weight. Polypropylene is recognized for its light weight as it is less dense than water. This material is also noted for its excellent chemical resistance in corrosive environments. Polypropylene provides excellent resistance to organic solvents, degreasing agents, and electrolytic attack.
Polypropylene Homopolymer (PP HOMO)
PPH is the most widely utilized in the polypropylene family. PPH offers a high strength to weight ratio and boasts excellent stiffness, superior scratch resistance, and good chemical resistance against most inorganic acids, alkalis, and salts. Polypropylene homopolymer has superb weldability characteristics that allows this material to be used in many corrosion resistant structures.
Polypropylene Copolymer (PPCO)
PPCO is a bit softer than PPH but has a better impact strength, is tougher, more durable, and has a lower temperature. Additionally, PPCO tends to have a better stress crack resistance than PPH. Polypropylene is not vulnerable to environmental stress cracking failures when exposed to soaps, wetting agents, and alcohols, unlike many other polymers.