Finished bottles produced from 28mm PET preforms must withstand mechanical stresses during filling, capping, shipping, and consumer use. The preform’s design contributes to the bottle’s ability to resist impact and pressure.

PET’s natural toughness, combined with precise preform engineering, results in bottles with high drop resistance and low risk of cracking or bursting. This is particularly important for carbonated beverages, where internal pressure is a significant factor.

The neck finish of the 28mm PET preform ensures effective sealing with compatible caps. Proper sealing is vital to prevent contamination, carbonation loss, and leakage. The precision in neck threading and dimensional tolerances directly affects the performance of the closure system.

Manufacturers conduct rigorous quality control to verify the neck finish dimensions and surface quality, ensuring consistent seal integrity.

The 28mm PET preform is widely used in various sectors of the beverage industry, including bottled water, soft drinks, juices, and dairy products. Its popularity stems from its balance of size, strength, and compatibility with multiple closure types.

Beyond beverages, the 28mm PET preform is also employed in packaging for edible oils, personal care products, and household chemicals, where a reliable seal and sturdy bottle construction are essential.

Understanding these features and performance aspects enables manufacturers and brand owners to select the right preforms for their products, improving production efficiency and ensuring customer satisfaction. As the packaging industry continues to evolve with a focus on sustainability and innovation, the 28mm PET preform remains a fundamental component in delivering reliable and high-performance PET bottles worldwide.

https://www.petpreformfactory.com/product/pet-preform/28mm-pet-preform-with-air-seal/

Bottle Mouth Size    Weight in Grams    Reference Capacity    Length（mm）    Number of Cartons    Remark or Note
28mm    16g    350ml-500ml    85    750pieces/Box    Gas Seal
28mm    18g    500-550ml    95    650pieces/Box    Gas Seal
28mm    21g    550-650ml    95    600pieces/Box    Gas Seal
28mm    23g    550-650ml    102    600pieces/Box    Gas Seal
28mm    26g    650ml-750ml    102    600pieces/Box    Gas Seal