PP5

PP5 is commonly used to denote polypropylene in the plastics industry, represented by resin identification code 5. It is a versatile thermoplastic polymer used in a wide range of consumer and industrial products.

Properties: PP is semi-crystalline, lightweight, and offers a balance of stiffness and toughness. It has a melting point around 160–170°C and a density of about 0.90 g/cm3. It provides good chemical resistance, electrical insulation, and fatigue performance; it can be manufactured as homo-PP or copolymers (random copolymer) to improve clarity or low-temperature impact. It is generally resistant to water and many solvents, although strong oxidizing agents can attack it. It can be sterilized by steam, making it suitable for medical and food-contact applications.

Applications: PP5 is used for packaging films and containers, bottle caps and closures, agricultural and consumer products, automotive components, and textiles. It is also used in medical devices due to its high temperature resistance and chemical inertness.

Processing and recycling: PP is processed by injection molding, extrusion, blow molding, and thermoforming. It is recyclable and accepted in many curbside programs as resin code 5; recycling rates vary by region and contamination; energy recovery is generally lower than for some other plastics.

Other uses: The label PP5 can appear in other contexts, including codes, product models, or designations in different fields. The intended meaning depends on context.