TPU material introduction
The tpu material is the abbreviation of Thermoplastic Urethane, and the Chinese name is thermoplastic polyurethane elastomer. TPU is a polymer material obtained by co-reacting a diisocyanate molecule such as diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) with a macropolyol or a low molecular polyol (chain extender).
Its molecular structure is a rigid block obtained by reacting diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) with a chain extender, and a diisocyanate such as diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI). The soft segments obtained by the reaction of the molecules with the macropolyol are alternately formed.
TPU is a mature and environmentally friendly material with excellent high tension, high tensile strength, toughness and aging resistance. At present, TPU has been widely used in medical and health, electronic appliances, industry and sports. It has the characteristics of high strength, good toughness, wear resistance, cold resistance, oil resistance, water resistance, aging resistance and weather resistance which are unmatched by other plastic materials. At the same time, he has many excellent functions such as high water repellency, moisture resistance, cold resistance, antibacterial, mildew proof, warmth, UV resistance and energy release.
The thermoplastic polyurethane elastomer TPU can be divided into two types according to the molecular structure: polyester type and polyether type. According to the processing method, it can be divided into injection molding grade, extrusion grade, blow molding grade and the like.
1. High wear resistance
2. Wide range of hardness: By changing the ratio of each reaction component of TPU, products with different hardness can be obtained, and with the increase of hardness, the product still maintains good elasticity.
3. High mechanical strength: TPU products have outstanding bearing capacity, impact resistance and shock absorption performance. Excellent cold resistance: TPU has a relatively low glass transition temperature and maintains good elasticity, flexibility and other physical properties at minus 35 degrees.
4. Good processing performance: TPU can be processed by common thermoplastic processing methods such as injection, extrusion, calendering and so on. At the same time, TPU can be processed together with certain polymer materials to obtain polymer alloys with complementary properties.
5. Oil, water and mold resistance.
6. Good recycling.
TPU resin can be used as an over mold for those materials. Adhesive bonding usually requires the material base to be consistent and compatible, so that the bonding properties of the material are very good and are not easily separated. TPU usually has good bonding properties with ABS, PC, ABS+PC materials. However, the bonding properties with nylon and PP materials are relatively poor.
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