Plastic raw materials are solid or elastomeric at room temperature, and the raw materials are heated during processing to turn them into fluid, molten liquids. Plastics can be divided into “thermoplastics” and “thermosets” according to their processing characteristics.
“Thermoplastics” can be heated and shaped many times and can be recycled. They are fluid like slime and have a slow melting state. Commonly used thermoplastics are PE, PP, PVC, ABS, etc. Thermosets solidify permanently when heated and cooled. The molecular chain forms chemical bonds and becomes a stable structure, so even if it is heated again, it cannot reach a molten liquid state. Epoxies and rubbers are examples of thermoset plastics.
The following are some common types and details of plastic processing processes: plastic casting (drop molding, coagulation molding, rotational molding), blow molding, plastic extrusion, plastic thermoforming (compression molding, vacuum forming), plastic injection molding, plastic Welding (friction welding, laser welding), plastic foaming
Post time: May-25-2022