PP is a semi-crystalline thermoplastic polymer with properties similar to polyethylene (PE). Both materials belong to the polyolefin family, consisting of paraffinic hydrocarbons characterized by a smooth, slightly waxy surface. Polypropylene is available as both homopolymer (PP-H) and copolymer (PP-C) grades, allowing the material to be tailored for different performance requirements.

Chemical Designation

Polypropylene (Polypropene)

Abbreviation

PP

Natural Color and Additives

• Grey (RAL 7032)
• Black
• White

Available Forms

• Rods
• Sheets
• Pressure pipes
• Pipe fittings
• Ventilation ducts and square ducts
• Profiles
• Welding rods and accessories
• Finished products, machined or injection molded

Key Properties

• Excellent dielectric properties
• Low density and lightweight
• Good chemical resistance
• Good sliding characteristics
• Good weldability
• Difficult to bond with adhesives
• High fatigue resistance
• Good temperature resistance
• Mechanical and electrical properties are retained in wet environments
• Very low moisture absorption

Typical Applications

PP is widely used in:

• Machinery manufacturing
• Automotive engineering
• Conveying and material handling systems
• Electrical engineering
• Precision engineering
• Plumbing and HVAC systems
• Household appliances
• Food processing equipment
• Medical technology equipment

Typical Products

• Fan impellers
• Door handles
• Instrument panels
• Steering wheels
• Appliance housings
• Automotive components
• Pharmaceutical packaging
• Containers
• Pump components
• Pipes and pipe fittings

Typical Benefits

• Excellent resistance to chemicals and corrosion
• Lightweight and cost-effective
• Good fatigue performance in dynamic applications
• Easy fabrication through welding and machining
• Suitable for industrial, food-processing and medical applications
• Reliable performance in humid and wet environments

Considerations

Polypropylene offers excellent chemical resistance and low weight, making it a popular choice for tanks, piping systems and industrial equipment. Due to its low surface energy, adhesive bonding can be challenging and may require special surface treatment or bonding techniques.