Overview of Polyurethane
Polyurethane, the full name of which is polyurethane, is a type of high-molecular material made by the addition polymerization reaction of isocyanate and polyol. Its name is derived from the carbamate bond in its molecular structure. The uniqueness of this material lies in the fact that by adjusting the type, proportion and synthesis process of raw materials, products with various properties can be prepared, ranging from soft foams to hard plastics, with a wide range of shapes and characteristics.
Main Features and Advantages
1. Outstanding wear resistance: The wear resistance of polyurethane is extremely outstanding, usually reaching 5 to 10 times that of natural rubber, making it have an extremely long service life in situations that require frequent friction.
2. Excellent elasticity and flexibility: Even at very low temperatures, it can maintain good elasticity and is not prone to cracking.
3. Excellent mechanical properties: It features high load-bearing capacity, tear resistance and tensile strength.
4. Good chemical and oil resistance: It has a good resistance to many oils, solvents and chemicals.
5. Excellent adhesion: This feature makes it perform exceptionally well in the fields of adhesives and coatings.
6. Wide processing adaptability: It can be processed and formed through various methods such as foaming, casting, and thermoplastic molding.
Main Uses
1. Polyurethane foam: This is the most important application form of polyurethane. It is divided into soft foam (used for sofas, mattresses, car seats, etc.) and hard foam (used as the core insulation and heat insulation material for building walls and refrigerators).
2. Polyurethane elastomers: They are often used in the manufacture of industrial rollers, conveyor belts, shoe soles, sealing rings, etc., as they combine the elasticity of rubber and the strength of plastic.
3. Polyurethane coatings: The formed paint film is tough, full, bright and scratch-resistant, and is widely used in wooden furniture, flooring, industrial equipment, automotive surface coating and other fields.
4.
Polyurethane Adhesive: With its powerful bonding strength, flexibility and fatigue resistance, it can bond various materials (such as metal, plastic, wood and fabric), and is known as the "all-purpose adhesive". It is indispensable in industries such as automobiles, footwear manufacturing, and composite film packaging.
5. Polyurethane
Ink Binder: In the printing industry, polyurethane serves as a binder for ink, endowing the ink with excellent adhesion, wear resistance, flexibility and chemical resistance. Especially in the printing of food flexible packaging, it can ensure that the ink adheres firmly to the film material and is safe and odorless.
Summary
In conclusion, polyurethane is a high-molecular material with highly adjustable performance and extremely wide applications. It integrates the advantages of wear resistance, toughness, elasticity and weather resistance. It plays a crucial role from the comfortable experience of daily home use to the high-performance requirements of industrial manufacturing. It is one of the indispensable key materials in modern industry and life.
