Characteristics and processing of PVC injection molded materials

PVC (polyvinyl chloride) Typical applications: water supply pipes, household pipes, house wall panels, commercial machine casings, electronic product packaging, medical equipment, food packaging, etc.
Injection Molding Process Conditions: Drying: Drying is usually not required. Melting temperature: 185~205C. Mold temperature: 20~50C Injection pressure: can be as large as 1500bar holding pressure: can be as large as 1000bar injection speed: in order to avoid material degradation, generally use a considerable injection speed. Runners and gates: All regular gates can be used. If you are working with smaller parts, it is best to use tip-type gates or submerged gates; for thicker parts, it is best to use fan-shaped gates.
Chemical and physical properties: Rigid PVC is one of the most widely used plastic materials. PVC material is a non-crystalline material. PVC materials are often added with stabilizers, lubricants, auxiliary processing agents, colorants, impact agents and other additives in actual use. PVC materials are non-flammable, high strength, weather resistant and excellent geometric stability. PVC is highly resistant to oxidizing agents, reducing agents and strong acids. The flow characteristics of PVC are rather poor and the process range is narrow. In particular, large molecular weight PVC materials are more difficult to process (this material usually incorporates a lubricant to improve flow characteristics), so small molecular weight PVC materials are commonly used. The shrinkage rate of PVC is quite low, generally 0.2 to 0.6%.