English name: Polytetrafluoro ethylene
Specific gravity: 1.7 g / cm 3
Mold shrinkage: 3.1-7.7%
Molding temperature: 300-330 ° C
Material properties:
1, long-term use temperature -80--220 degrees, has excellent chemical resistance, corrosion resistance to all chemicals, friction coefficient is the lowest in plastic, and has good electrical properties, its electrical insulation is not affected by temperature The impact, known as the "plastic king."
2, its chemical resistance is similar to PTFE, better than vinylidene fluoride.
3. Its creep resistance and compressive strength are better than that of polytetrafluoroethylene, and the tensile strength is high, and the elongation can reach 100-300%. Good dielectric properties and excellent radiation resistance.
Application range:
1. It is suitable for making corrosion-resistant parts, reducing wear parts, seals, insulation parts and medical equipment parts.
2, wire, cable insulation, anti-corrosion equipment, sealing materials, pump valve bushings and chemical containers.
Molding performance:
Features:
1. Crystallized material, low moisture absorption. It can be processed into articles by processing methods which are usually made of thermoplastics.
2. Poor fluidity, easy to decompose, and corrosive gas generated during decomposition. The molding temperature should not be strictly controlled to exceed 350 degrees, the mold should be heated to 100-150 degrees, and the casting system should have a small flow resistance. It can form thin-walled simple products with a thickness of 0.7-0.8 mm.
3, transparent pellets, injection molding, extrusion molding. The molding temperature is 300-330 degrees, and 350 degrees or more is liable to cause discoloration or bubble generation. It is suitable for high-speed low-pressure molding, and it is difficult to take off the mold.
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