preformból

Preformbol is a term that refers to a pre-formed component, typically made of plastic, that is used in the manufacturing process of bottles. These preforms are essentially solid plastic tubes with a threaded neck. They are shaped like a thick test tube and are produced through injection molding. The most common material for preforms is PET (polyethylene terephthalate) due to its clarity, strength, and gas barrier properties, making it suitable for packaging beverages and food.

The preform is then heated and stretched into the final bottle shape using a process called stretch blow molding. This involves inserting a rod into the heated preform to stretch it, and then inflating it with high-pressure air within a mold. This method allows for efficient production of bottles with complex shapes and designs. Preforms offer advantages in terms of storage, transportation, and handling compared to shipping finished bottles. They are lightweight and can be easily stacked. The production of preforms is a crucial intermediate step in the creation of many common plastic bottles.