PET is milky white or pale yellow highly crystalline polymer, the surface is smooth and glossy. Creep and fatigue resistance, good wear resistance, abrasion
Small and high hardness, is the largest of the thermoplastic toughness; Electric insulation performance is good, the temperature effect is small, but corona resistance the gender is poorer. Non-toxic, resistant to
Climate resistance, resistance to chemical stability, bibulous rate is low, resistance to weak acid and organic solvents, but not heat water immersion, not alkali resistance.
PET resin of high glass transition temperature, crystallization speed is slow, molding cycle is long, the molding cycle is long, the molding shrinkage, dimension stability is poor, "
Crystallization of forming a brittle, low heat resistance.
Through the nucleating agent and crystallization agent and glass fiber reinforced improvement, PET not only has the nature of PBT outside, still have the following features:
1. The thermal deformation temperature and the long-term use of temperature is thermoplastic general engineering plastic in the highest;
2. Because of the high heat, enhance the PET at 250 ℃ of solder bath impregnated 10 s, almost no deformation also don't change color, especially suitable for the preparation of tin welding electronic
, electric parts;
3. 200 mpa bending strength, elastic modulus of 4000 mpa, creep and fatigue resistance is also very good, the surface hardness is high, the mechanical properties and the thermosetting plastic
Similar material;
4. Because the production of PET used than producing ethylene glycol butyl glycol used PBT almost half the price of cheap, so PET resin and enhance PET is engineering plastic
The material price is the lowest, has the very high price.