| abstract |
The present invention provides a kind of packaging material, its packaging material being patch, comprising the internal layer membrane by the PET series resin formation with heat sealability and base film, the heat cover of aforementioned internal layer membrane is made up of the isophthalate modified pet resin that the copolymerization ratio of M-phthalic acid composition is 10 moles of %～20 moles of %.It it is more preferably that at least there are the plural layers of following 2 layers by the internal layer membrane of the PET series resin formation with heat sealability: the heat cover side layer formed by the isophthalate modified pet resin that the copolymerization ratio of M-phthalic acid composition is 10 moles of %～20 moles of %；With the layer formed by the isophthalate modified pet resin that the copolymerization ratio of M-phthalic acid composition is 0 mole of %～5 moles of %. |