PVC panels are one of the most widely used materials. Its essence is actually a vinyl polymer, and the material is amorphous. Additives such as stabilizers, lubricants, processing aids, dyes and anti-impact agents are often added to PVC materials in actual use. PVC panels are non-flammable, weather resistant and have excellent geometric stability. It has strong resistance to oxidants, reductants and strong acids. PVC panels are damaged by H2SO4 and should not come into contact with aromatic hydrocarbons and chlorinated hydrocarbons.
The melting temperature is a very important process parameter in the processing of PVC panels. If this parameter is insufficient, a material difference will occur. PVC has poor flow characteristics and a narrow processing area. In particular, PVC is difficult to process materials with a high molecular weight (lubricants are usually added to improve the flow of such materials), so plates with a low molecular weight are usually used. The shrinkage rate of PVC is very low, generally 0.2~0.6%.
But PVC sheets generally do not need to be dried. There are several parameters you can take a look at.
Melting temperature: 185~205℃. Mold temperature: 20~50℃. Injection pressure can reach 1500. Holding pressure up to 1,000 bar. To prevent material degradation, considerable injection rates are often required. For slides and gates, all traditional PVC gates can be used.
If processing small parts, use a needle tip gate or an immersion gate. For parts with thicker PVC sheets, use fan gates. The minimum diameter of the tip gate or immersion gate should be 1mm. The thickness of each gate shall not be less than 1 mm. Typical uses p. PVC has the advantages of rich raw materials, mature manufacturing technology, low price, and wide range of uses. It has become a general-purpose resin, second only to polyethylene resin, accounting for 29% of the world's total synthetic resin consumption.Tha na tha gu h-erd mu dhidin fearton precious byrd PVC a clichdad sa mhar-chuid airson leather feudain, simhdach film is uir, pioban poicanahelan, taighhasban, taighhasban. dh Thoraidh Dealnach, Pacad Bad, Agus Plastiig Agus Thoraidhion Cruid Leithid Seotichen, Arson, Unnegan, Agus Bhalbaichen .
