PU (polyurethane) is a versatile polymer with a wide range of applications and excellent physical properties. The following is a detailed introduction to PU materials:
1. Physical Properties:
Density: The density of PU varies depending on the specific type, usually between 1.1 and 1.3 g/cm³.
Melting point: PU is a thermoplastic with no definite melting point. However, it can soften and flow within a specific temperature range.
Temperature resistance: PU has good temperature resistance and is generally used for long periods of time at temperatures between -40°C and +80°C.
Chemical resistance: PU has good resistance to many chemicals, but may be less resistant to strong acids, bases and solvents.
2. Mechanical properties:
Elasticity and toughness: PU has excellent elasticity and toughness, making it ideal for use in the manufacture of springs, seals and vibration reduction components.
Tensile Strength: PU's high tensile strength makes it suitable for the manufacture of high strength structural components.
Abrasion resistance: PU exhibits good abrasion and impact resistance, making it suitable for the manufacture of durable and highly loaded parts.
3. Processing properties:
Injection molding: PU can be injection molded to make products of various shapes and sizes.
Cast molding: PU can also be cast to make films and sheets.
Spraying and coating: PU can be applied to various surfaces as a coating or spraying material to provide protection and decorative effects.
4. Application areas:
Clothing and footwear: such as sports shoes, boots and jackets
Furniture and home furnishings: such as sofas, mattresses and protective gear, etc.
Automobiles and transportation: such as car seats, steering wheels and cushioning parts, etc.
Construction and building materials: e.g. thermal insulation, sealants and waterproof coatings, etc.
Electronic and electrical products: such as wire protectors, connectors and insulators, etc.
Overall, PU is a polymer with many excellent properties and a wide range of applications. It not only has good physical and mechanical properties, but also has good processing properties and adaptability, so it has an important position in a variety of industrial and consumer applications.
