The spray nozzle of the spray plastic bottle is made of polyvinyl chloride, and its production type is mass production. The nozzle material of spray plastic bottles is polyvinyl chloride.

From the perspective of performance, PVC materials have flame retardancy, self-extinguishing properties, and no dripping properties. In addition, they also have high strength, good weather resistance, and good geometric stability. From the perspective of dielectric properties, polyvinyl chloride has good electrical insulation and chemical stability. From the perspective of molding, polyvinyl chloride has good water absorption, poor melt flow, low shrinkage, and molding is not easy. . In addition, spray plastic bottles are prone to defects such as insufficient pouring and shrinkage when molding. When the molding temperature is relatively high, it is easy to decompose hydrogen chloride, and the injection speed is too fast to cause shrinkage. Therefore, care should be taken to control the molding temperature and residence time during molding. The injection system should be thick and short, the cross section of the inlet should be larger, the cooling time should not be too fast, and a large diameter nozzle should be selected.

The spray plastic parts of the spray plastic bottle have high requirements for the structure and size accuracy. In order to obtain qualified plastic parts, in addition to the reasonable selection of the raw materials of the plastic parts, the structural processability of the plastic parts should also be considered. The structural processability of the plastic parts has a direct relationship with the design of the mold. The requirements of the process can be used to design a reasonable mold structure, which can prevent defects such as bubbles, shrinkage holes, depressions and cracks during molding, which can improve the production efficiency of spray plastic bottles and reduce part of the cost. When designing the spray head plastic part of the spray plastic bottle, the surface of the part must be free of defects, burrs, and insufficient pouring. If there are no special surface quality requirements, such requirements are still well realized. Therefore, it is the purpose to select the appropriate injection molding process parameters and obtain high production efficiency and economic benefits with very low energy and raw material consumption.

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