Application and characteristics of PET heat sealing film
Sep 07, 2022
Ordinary PET is a crystalline polymer. After the PET film is stretched and oriented, it will produce a large degree of crystallization. If it is heat-sealed, it will shrink and deform, so the ordinary PET film does not have heat-sealing properties.
When PET film is used as commodity packaging, in order to solve the problem of heat sealing, 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 die, a three-layer co-extruded heat-sealing PET film has been developed. This heat-sealing PET film Because there is a heat-sealable layer on one side, it can be directly heat-sealed, which is very convenient to use. Heat-sealable PET film can be widely used in the fields of packaging and card protection films of various commodities.
