TPU详细资料中英文TPU详细资料中英文.doc

English full name: TPU THERMOPLASTIC URETHANE Chinese name: THERMOPLASTIC polyurethane yan color: transparent features: 1. The THERMOPLASTIC polyurethane for hot plasticity resin. 2. The oil resistant heat resisting abrasion resistance, but poor water resistance to cold. 3. The hard segments to increase its mechanical qualitative change, but reduce the compression strain and elastic. 4. Can make foam, elasticity of the material. 5. Its good gloss coating easily. Mechanical：properties (ordinary) heat resistance tensile strength: 440-490 KGF/cm ^ 2 hardness: 90-98Hs(JIS a)Shore D youngs modulus (JIS a) : 120-190 ekgf/cm ^ 2 tensile elongation: 900% the thermal properties of softening point: 114 ℃ to 131 ℃ forming processability viscosity performance: viscosity decrease with the increase of shear shear rate 溫度變化範圍 黏度變化情形(g/cm．sec) 10^ 1 185→225? 1.684*10^4→1.180*10^3 10^ 2 185→225℃ 5.130*10^3→8.815*10^2 5*10^ 3 185→225℃ 1.570*10^3→5.265*10^2 ? specific gravity: 1.12 Application Description machinery: conveyor belt, gear, cars (filter tank cover), zero accessories of loom.Other aspects: wires, adhesive, paint, tires, leather goods manufacturing. Daily necessities: sole, synthetic leather, leather belt, etc. TPU processing problem The mucous membrane of the moulded part1. Increase the demoulding viscosity.2. The molding time (lower mold temperature and prolonging cooling time, reduce the injection pressure, shorten the holding time, etc.).Shrink warp1. The design of multipoint feeding door.2. Mold temperature uniformity.3. Adjust the molding conditions (improve tree refers to the temperature, mold temperature, reduce injection pressure).4. The ejector contribute to the average.splash1. The paint to fully mix (by extruding machine, etc.).2. The material change door, splash position will also change.3. Change the color pigment.TPU rheological properties and thermal propertiesOne, the rheological p