Performance of transparent plastics
Transparent plastics must have high transparency first, followed by a certain degree of strength and wear resistance, can resist shocks, heat resistant parts are good, chemical resistance is excellent, and water absorption is small. Only in this way can it be used to meet the requirements of transparency. Long-term change. PC is an ideal choice, but mainly due to the high cost of its raw materials and the difficulty of injection molding, it still uses PMMA as the main choice(for commonly required products), and PPT has to be stretched to obtain good mechanical properties. Therefore, it is mostly used in packaging and containers.
Common problems that should be noticed during the injection of transparent plastics
Due to the high light permeability of transparent plastics, it is inevitable that the surface quality of plastic products must be strict, and there must be no markings, stomata, and whitening. Fog Halo, black spots, discoloration, poor luster and other defects, so throughout the injection molding process on raw materials, equipment. Mould, even the design of products, should be very careful and put forward strict or even special requirements.
Secondly, because transparent plastics have a high melting point and poor liquidity, in order to ensure the surface quality of the product, it is often necessary to make minor adjustments in the process parameters such as barrel temperature, injection pressure, and injection speed, so that the plastic can be filled with molds. It does not produce internal stress and cause product deformation and cracking.
Post time: Apr-08-2020