What kind of plastic cap is commonly used
From the material generally divided into PP class and PE class.PP materials: used in gas beverage cap gasket and cap, heat resistant deformation, high surface strength, chemical stability is good, the disadvantage is poor toughness, low temperature is easy to brittle, due to poor oxidation resistance, but also not wear-resistant.This kind of cap is used for wine and carbonated drinks.
PE material: mainly used for hot filling bottle caps and aseptic cold filling bottle caps, this material is non-toxic, has good toughness and impact resistance, is also easy to form film, high and low temperature resistance, environmental stress cracking performance is better, the disadvantage is the forming shrinkage, severe deformation.Now on the market a lot of vegetable oil, glass bottle of sesame oil is this kind of material.
Plastic bottle caps are generally divided into gasket type and plug type.The production process is divided into pressure molding and injection molding.
The size is: 28 teeth, 30 teeth, 38 teeth, 44 teeth, 48 teeth and so on in the majority.The number of teeth is divided into: 9 and 12 multiples.Anti-theft ring is divided into: 8 buckle, 12 buckle and so on.Most of the structures are: detached connection (also called connection bridge) and one - time type.Use is generally divided into: gas cap, heat - resistant cap and sterile cap.
Because the plastic material cost is low, concentrated the advantages of a lot of material at a suit, also welcomed by the packaging container materials plant, to a certain extent, but due to the change of the structure performance is not very clear, in some food packaging applications must also consider, but with the development of science and technology, plastic cover will be more and more widely applied in the field of food packaging.
