(PTFE-ethylene * * * polymer)
English name: Polytetrafluoro ethylene
Specific gravity: 1.7g/cm3 molding shrinkage: 3. 1-7.7% Molding temperature: 300-330℃ Drying conditions:-
The material performance is 1, and the long-term service temperature is -80-220 degrees. It has excellent chemical resistance, corrosion resistance to all chemicals, the lowest friction coefficient in plastics and good electrical properties. Its electrical insulation is not affected by temperature, and it is known as the "king of plastics".
2. Its chemical resistance is similar to PTFE, but better than vinylidene fluoride.
3. Its creep resistance and compressive strength are better than PTFE, and its tensile strength is high, and its elongation can reach 100-300%. Good dielectric properties and excellent radiation resistance. 1, suitable for making corrosion-resistant parts, wear-resistant parts, sealing parts, insulating parts and medical device parts.
2, wire and cable insulation, anti-corrosion equipment, sealing materials, pump valve casing and chemical containers.
Plasticity 1. Crystalline substance, low hygroscopicity. It can be processed into products by conventional processing methods of thermoplastics.
2. Poor fluidity, easy decomposition, and corrosive gas generated during decomposition. The molding temperature should be strictly controlled not to exceed 350 degrees, the mold should be heated to 100- 150 degrees, and the resistance of the gating system to the material flow should be small. Thin-walled simple products with a thickness of 0.7-0.8mm can be formed.
3. Transparent granular materials, injection molding and extrusion molding. The molding temperature is 300-330 degrees, and it is easy to change color or blister above 350 degrees. Suitable for high-speed and low-pressure molding, demoulding will be more difficult.