The materials used are polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (polyester) (PET) and so on.

Usually mineral water bottles are made of PVC or PET, carbonated drinks bottles are made of PET, refreshing drinks bottles, liquid food bottles are made of PVC and PE, detergent bottles, cosmetics bottles, milk bottles and lactic acid bacteria drinks are mostly made of PE.

At the early stage of bottle cap development, cork material, tinplate crown cap and screw cap were used. Up to now, we have continuously developed aluminum long neck aluminum caps, aluminum carbonate caps, hot-filled aluminum caps, injection aluminum caps, medicine caps, split ring caps, safety claw caps, plastic bottle caps and other products.

Extended data:

Bottle cap is an important part of food and beverage packaging, and it is also the place where consumers first come into contact with products.

Bottle caps are widely used in bottled products because of their functions of keeping the contents airtight, anti-theft and safety. Therefore, bottle cap is the upstream industry of food, beverage, wine, chemical industry and medicine industry, and it is the key product of bottle container packaging.

Bottle cap made of PP material: It is mostly used as gasket and bottle cap for gas drinks. This material has low density. Heat resistance, no deformation, high surface strength, innocuity and good chemical stability. Disadvantages are poor toughness, brittleness at low temperature, poor oxidation resistance and wear resistance. Bottle caps made of this material are mostly used for bottle cap packaging of fruit wine and carbonated drinks.

PE bottle caps: mostly used for hot filling bottle caps and aseptic cold filling bottle caps. This material is nontoxic. It has good toughness and impact resistance, is easy to form a film, is resistant to high and low temperatures, and has good environmental stress cracking performance. The disadvantage is that the molding shrinkage is large and the deformation is serious. At present, many vegetable oils and sesame oils in glass bottles are made of this material.

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