Lightweighting: By optimizing preform wall thickness (e.g., thinning non-load-bearing areas), weight is reduced while maintaining strength, thereby reducing raw material consumption (e.g., the weight of a 500ml beverage bottle preform has been reduced from 20g to less than 15g).
Environmentalization: Using recycled PET (rPET) to produce preforms promotes a circular economy (the EU requires 50% recycled content in plastic bottles by 2030).
Functionalization: Developing antimicrobial preforms (with the addition of antimicrobial agents) and high-barrier preforms (with multi-layer structures to enhance oxygen and UV protection) to meet the needs of specialized contents (e.g., functional beverages and cosmetics).