In the field of packaging and manufacturing, PET (polyethylene terephthalate) preforms are essential components used in the production of bottles and containers. Among various sizes and types of PET preforms, the 28mm PET preform stands out for its specific applications and benefits.

A 28mm PET preform is a molded piece of PET plastic that serves as the starting point for producing bottles or containers. The “28mm” designation refers to the diameter of the preform's neck, which is designed to fit standard bottle caps and closures. These preforms are created using injection molding techniques, where PET plastic is heated until it melts, then injected into a mold to form the preform shape. Once the preform is produced, it undergoes further processing to be transformed into a final bottle or container through blow molding.

The neck of a 28mm PET preform is designed to accommodate standard closures such as caps and lids. This uniformity allows for compatibility with various packaging lines and ensures a consistent sealing process. The 28mm neck size is commonly used in both beverage and non-beverage applications, making it a versatile choice in packaging.

PET is favored for its strength, durability, and clarity. The material offers excellent resistance to impact and temperature variations, making it suitable for various environmental conditions. PET preforms also provide good barrier properties against moisture and gases, which is crucial for preserving the quality of the contents within the bottles.