The Use Of Pet Bottle Mould In Product Production

18 juin

PET bottles have certain processing and production methods, and the processing methods mainly include extrusion, injection molding, calendering, blow molding, molding, lamination, casting, and the like. The PET bottle is blow molded, which is heated and melted into a special Pet Bottle Mould. At the same time, there is air pressure inside, and PET is pressed onto the mold to form the final product shape.

Since the bottle is subjected to outward pressure during forming, the internal stress of the bottle itself is inward. When the temperature of the heating reaches a certain level, the PET is softened, and the resistance of the internal stress is reduced, so that the bottle becomes smaller. PET bottles have certain processing characteristics in processing and production, and are processed according to certain methods of processing, ensuring good quality and performance in production and processing.

The following describes the processing characteristics of PET bottles in different aspects: shrinkage-enhanced PET shrinkage is smaller than ordinary pressure PET, which is mainly composed of heat shrinkage and chemical structure shrinkage. The factors affecting shrinkage are first of all PET species. Generally, phenolic is larger than epoxy, epoxy phenolic, unsaturated polyester, etc., and unsaturated polyester material has the smallest shrinkage.

Other factors affecting shrinkage are the shape and wall thickness of the plastic part, and the thick wall shrinks greatly. The PET contains a large amount of filler and glass fiber, and the shrinkage is small. When the volatile content is large, the shrinkage is large, the molding pressure is large, and the loading amount is large. The shrinkage is small, the hot mold release has a larger shrinkage than the cold mold release, and the curing is insufficient to shrink. The shrinkage rate of PET bottles is one of the important factors affecting the use of Pet Bottle Preform. In use, the shrinkage rate of PET bottles should be reduced to prevent important shrinkage during use and affect the actual use.

The fluidity of the fluidity enhancing material is inferior to that of the conventional pressure PET. When the fluidity is too large, the loss of the resin and the accumulation of the glass fiber are likely to occur. If it is too small, the molding pressure and temperature will increase significantly. There are many factors affecting liquidity. To assess the fluidity of a certain material, it must be analyzed according to the composition. Factors affecting liquidity.

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