The usual process of PET production is the use of preform. Therefore, based on the volume of the final product and the shape and size of the bottle, the preform molds are designed and made, and then the type and dimensions of the lid used in the final product are predicted in the preform design. Considering the role of the preform in the production of PET bottles, the quality of the product depends on the quality and design of the preform. Sepehr Plastic Padideh Company (the largest manufacturer of all types of doors and preforms).
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