What's the difference between TPU and silicone?
Silicone rubber has tensile strength, good elasticity, excellent heat resistance, cold resistance, dielectric properties and ozone resistance and ageing resistance properties, outstanding performance of silicone rubber is the use of wide temperature, at -60 DEG C (or lower temperature) to +250 DEG C (or higher temperature) under long-term use. But the tensile strength and tear strength poor mechanical properties of silicone rubber at room temperature, the physical and mechanical properties than most synthetic rubber, and in addition to silicone, silicone rubber, silicone rubber general oil resistance, solvent resistance is poor, so the silicon rubber should not be used for the general conditions of the occasion, but very suitable for many special occasions.
The main characteristics of 1. TPU high wear resistance: Taber abrasion index between TPU and other materials (wear condition: CS17 round, 1000g/ round, 5000r/m 23 C) material wear (mg) material wear (mg) TPU 0.5-3.5 natural rubber 146 nylon 61016 impact resistant polyester film 18 PVC 160 Ding Benxiang 177 nylon 1124 rubber plasticizer PVC 187HDPE 29 205PF 42 ABS 275 butyl hydroxy rubber 44 CBR 280 324LDPE 70 PS nylon 6649 nylon 63662. hardness range: by changing the TPU of the reaction components, we can get different hardness of the products, and with the increase of hardness, the products still maintain good elasticity. 3., high mechanical strength: TPU products carrying capacity, shock resistance and shock absorption performance prominent. Cold resistance is prominent: TPU glass transition temperature is relatively low, at 35 degrees below zero, still maintain good flexibility, flexibility and other physical properties. 4., processing performance is good: TPU can use the common thermoplastic material processing methods for processing, such as injection, extrusion, calendering and so on. At the same time, TPU can work with some polymer materials to obtain complementary polymer alloys. 5., oil resistance, water resistance, mildew resistance. 6., good recycling. Mold silicone rubber features 1, with non deformation, high temperature, acid, alkali, non swelling features. 2, shrinkage rate, complex number of times, the mold silica gel shrinkage rate of 2/1000. 3, tensile strength, good elasticity, good tear, not only let you are beautiful, but also enables you to make the product deformation, high temperature at 200 degrees -50 degrees below zero are no problem, silicone mold still not crisp, still very soft, the simulation results is very good. Pad printing silicone features 1, low viscosity, good liquidity, 2, no shrinkage, good oil, pad printing patterns clear, 3, glial fine, good resilience, pad printing more times
Polyurethane rubber, also known as PU, has high abrasion resistance and is often used as an oil seal ring. Raw materials, oils, films and pellets are mostly market - based products for granular materials. Generally speaking, more wear-resistant polyurethane rubber, which is characterized with high hardness, good elasticity, high strength, high wear resistance, tear resistance, aging resistance, ozone resistance, radiation resistance and good conductivity, is generally not more than rubber.
