Injection molding characteristics of the hottest P

2022-08-21
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Injection molding characteristics of PC polycarbonate

typical application range:

Electrical and commercial equipment (computer components, connectors, etc.), appliances (food processing machines, refrigerator drawers, etc.), transportation industry (vehicle front and rear lights, dashboard, etc.)

injection molding process conditions:

drying treatment: PC material has hygroscopicity, and drying before processing is very important. The recommended drying condition is 100C to 200C, 3-4 hours. The humidity before processing must be less than 0.02%

melting temperature: 260~340c

mold temperature: 70~120c

injection pressure: use high injection pressure as much as possible

injection speed: use low-speed injection for smaller gates and high-speed injection for other types of gates

chemical and physical properties:

pc is an amorphous engineering material, which has particularly good impact strength, thermal stability, gloss, bacterial inhibition, flame retardancy and antifouling properties, that is, according to a dictionary Σ dyeing. The notched Izod impact strength of PC is very high, and the shrinkage is very low, generally 0.1% - 0.2%. 7. PC with customer setting function has good mechanical properties, but poor flow characteristics, so the injection molding process of this material is difficult. When choosing PC materials of what quality, we should take the final expectation of the product as the benchmark. If plastic parts require high impact resistance, PC materials with low flow rate should be used; On the contrary, PC materials with high flow rate can be used, so the injection molding process can be optimized because the phase plastic deformation from large to small is directly related to temperature

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