The shape of the plastic preform before molding, its wa […]
The shape of the plastic preform before molding, its wall thickness, high transparency, and can be sealed with a common plastic bottle cap, plus the advantages of not breaking, standing on the table, etc., can be used for many purposes instead of test tubes. Plastic Bottle Manufacturer tells you the knowledge of plastic preform quality control
The quality of the bottle depends on the quality of the preform. The preform is divided into two types, one is a long gate and the other is a short gate. Domestic preforms use more short-gate preforms, while foreign ones use more long gates.
The preform of the long rubber mouth is cut off due to the bottom gate, and the tension is evenly distributed during the blowing process, so that the quality of the bottle to be blown out is better, and the cut portion can be recycled, which is beneficial to save the raw material cost. Today, as oil resources are increasingly scarce, domestic manufacturers will be more inclined to the preforms of long gates. The quality of the preform during production is controlled by the degree to which the preform is prevented from being scratched during transport.