white opaque pet film polyester top film

normal PET is a crystalline polymer, and after the PET film is stretched and oriented, it will produce a large degree of crystallization, and if it is heat sealed, it will shrink and deform, so the ordinary PET film does not have heat sealing performance. In order to solve the problem of heat sealing when PET film is used as commodity packaging, the method of compounding BOPET film with PE film or CPP film is usually adopted, which limits the application of BOPET film to a certain extent.

In order to solve the problem of heat sealing, through the modification of PET resin, and the use of A/B/C three-layer structure of the die, a three-layer co-extruded heat-sealed PET film has been developed, and this heat-sealed PET film can be directly heat-sealed because one side of the heat-sealing PET film can be heat-sealed, so it can be directly heat-sealed, and it is very convenient to use. Heat-sealed PET film can be widely used in the packaging of various commodities and card protection films.

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