PVC particles are the base material (basic raw material) of PVC plastic molding. PVC materials have many characteristics: non flammable, high strength, weather resistance and excellent geometric stability. What are PVC particles for?
PVC has strong resistance to oxidants, reducing agents and strong acids. However, it can be corroded by concentrated oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid, and is not suitable for contact with aromatic hydrocarbons and chlorinated hydrocarbons.
Melting temperature is a very important process parameter in PVC processing. If this parameter is not proper, it will lead to material decomposition. PVC granules
The flow characteristics of PVC are quite poor, and its process range is very narrow. In particular, high molecular weight PVC materials are more difficult to process (this material usually needs to add lubricants to improve the flow characteristics), so small molecular weight PVC materials are usually used. The shrinkage of PVC is quite low, generally 0.2-0.6%.
Injection molding process conditions drying treatment: usually no drying treatment is required. Melting temperature: 185-205c mold temperature: 20-50c injection pressure: up to 1500bar, holding pressure: up to 1000bar injection speed: to avoid material degradation, the injection speed should be relatively high. Runner and gate: all conventional gates can be used. For smaller parts, it is best to use a needle tip gate or a submerged gate; for thicker parts, a fan gate is preferred. The minimum diameter of needle tip gate or submerged gate shall be 1 mm; the thickness of fan gate shall not be less than 1 mm. Typical uses: water supply pipe, household pipe, house wall panel, commercial machine shell, electronic product packaging, medical equipment, food packaging, etc.