Polyurethane (PUR) is a kind of polymer with repetitive structure unit of carbamate segment, which is made by reaction of isocyanate and polyol. PUR products are divided into foaming products and non-foaming products two categories, foaming products are soft, hard, semi-hard PUR foam; Unfoamed products include coatings, adhesives, synthetic leather, elastomers and elastic fibers. PUR material has excellent performance, wide use, and many kinds of products, especially PUR foam is the most widely used.
Polyurethane (PUR) is a kind of polymer with repetitive structure unit of carbamate segment, which is made by reaction of isocyanate and polyol. PUR material has excellent performance, wide use, and many kinds of products, especially PUR foam is the most widely used.
PUR is used as an insulating, sheathing or filling layer in cables and has the following advantages:
1. Electrical performance: PUR has excellent electrical insulation performance, which can ensure the electrical performance of the cable is stable under high voltage and high frequency.
2. Temperature and heat resistance: PUR has a wide temperature tolerance range and can adapt to the working temperature of the cable in various environments. In addition, PUR has excellent heat resistance, which can ensure that the cable is not easy to deform or burn at high temperatures.
3. Wear resistance and corrosion resistance: PUR material is wear-resistant and corrosion resistant, which can protect the cable from various environmental factors and extend the service life of the cable.
4. Good elasticity: The elasticity of PUR material is excellent, which can maintain good deformation resistance when the cable is subjected to external force, and avoid the phenomenon of cable cracking and damage.
5. Flame retardant: PUR material has excellent flame retardant performance, which can effectively prevent the burning and spread of cables in unexpected situations such as fire.
6. Environmental protection: PUR material is non-toxic and harmless, meets environmental protection requirements, and will not cause harm to the environment and human body.
Therefore, in the cable industry, PUR materials are widely used in power cables, communication cables, control cables and other fields.
Features:
1. Thermal performance: PUR has a high temperature tolerance and can maintain its physical properties in a large temperature range.
2. Mechanical properties: PUR has excellent tensile strength, bending strength and tearing strength, making it suitable for occasions that need to withstand stress.
3. Chemical properties: PUR has a good tolerance to most acids, alkalis, salts and other chemicals, making it stable in various chemical environments.
4. Electrical properties: PUR is a good electrical insulation material, suitable for the manufacture of electronic products.
5. Thermal insulation performance: PUR has excellent thermal insulation performance and can be used to manufacture thermal insulation materials.
6. Processing performance: PUR is easy to process and can be molded by injection molding, extrusion, pouring, etc.
Application:
1. Foam products: PUR is widely used in various fields, such as soft foam for the manufacture of sofas, mattresses and other furniture, hard foam for the manufacture of refrigerators, air conditioners and other appliances insulation layer and sound insulation layer.
2. Coating: PUR coating has excellent wear resistance, weather resistance, chemical resistance and other properties, and is used for the surface coating of metal, glass, plastic and other materials.
3. Adhesive: PUR adhesive has high adhesion, weather resistance, temperature resistance and other properties, is used for bonding various materials, such as glass, metal, wood and so on.
4. Synthetic leather: PUR synthetic leather with light weight, durable, beautiful and other characteristics, often used in the manufacture of bags, shoes and other products.
5. Elastomers and elastic fibers: PUR elastomers and elastic fibers have excellent elasticity and temperature resistance, are used in the manufacture of tires, conveyor belts and other products.
6. Hot melt adhesive: PUR hot melt adhesive is a single-liquid, solvent-free, environmentally friendly adhesive, which is often used in the manufacture and maintenance of electronic appliances. For example, during the assembly of a mobile phone, PUR hot melt adhesive can be used to hold the LCD screen, battery and other electronic components together. Similarly, in the manufacture of computers, PUR hot melt adhesives can be used to hold circuit boards, electronic components and housings together. In addition, PUR hot melt adhesive also plays an important role in the structure and assembly process of air conditioners, washing machines and other household appliances, as well as automobiles, ships, buildings and other fields.
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