At this stage, many glass bottle packaging containers are equipped with plastic caps. There are many differences in structure and materials, and they are usually divided into PP and PE in terms of materials.
PP material: It is mainly used for the gas beverage bottle cap gasket and bottle stopper. This kind of material has low density, high temperature resistance, no deformation, high surface strength, non-toxic, good chemical stability, poor toughness, brittle crack at low temperature, poor oxidation resistance, and no wear resistance. The stoppers of this kind of materials are mostly used for the packaging of fruit wine and carbonated beverage bottle caps.
PE materials: They are mostly used for hot filling corks and sterile cold filling corks. These materials are non-toxic, have good toughness and impact resistance, and are also easy to form films. They are resistant to high and low temperatures, and have good environmental stress cracking characteristics. The defects are large molding shrinkage and severe deformation. Nowadays, many vegetable oils and sesame oil in glass bottles are of this kind.
Plastic bottle covers are usually divided into gasket type and internal plug type. The production process is divided into compression molding and injection molding.
Most of the specifications are: 28 teeth, 30 teeth, 38 teeth, 44 teeth, 48 teeth, etc.
Number of teeth: multiples of 9 and 12.
The anti-theft ring is divided into 8 buckles, 12 buckles, etc.
The structure is mainly composed of: separate connection type (also called bridge type) and one-time forming type.
The main uses are usually divided into: gas bottle stopper, high temperature resistant bottle stopper, sterile bottle stopper, etc.
Post time: Jun-25-2023