Polyurethane (PUR and PU) is a polymer composed of organic units joined by carbamate (urethane) links. While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available.
Polyurethane polymers are traditionally and most commonly formed by reacting a di- or tri poly-isocyanate with a polyol. Both the isocyanates and polyols used to make polyurethanes contain, on average, two or more functional groups per molecule.
Polyurethanes are used in the manufacture of high-resilience foam seating, rigid foam insulation panels, microcellular foam seals and gaskets, durable elastomeric wheels and tires (such as roller coaster, escalator, shopping cart, elevator, and skateboard wheels), automotive suspension bushings, electrical potting compounds, high performance adhesives, surface coatings and surface sealants, synthetic fibers (e.g., Spandex), carpet underlay, hard-plastic parts (e.g., for electronic instruments), condoms, and hoses.
- Top 10 Rapid Molding service manufacturer
- Metal injection molding
- Hot Runner Technology for Bio-Resins
- Supply of Imported Vehicles Still Goes down in the Chinese Market
- Why GM dealers have a chance to shine
- Hot Runner Application Review Leads to Successful Processing
- Stainless Steel Fork mold
- Plastic Injection Mould for Home Appliance Parts
- Home Appliance Plastic Injection Mould/Molding for Cleaner Mould
- High Quality Pei Plastic Mould Injection Parts Factory