| 摘要 |
A heat-sealable, composite film comprising a polymeric substrate layer having a first and second surface, a primer layer disposed on the first surface of the substrate layer, and a heat-sealable polymeric layer disposed on the primer layer, wherein (i) the polymeric material of the primer layer comprises poly(vinylidene chloride)(PVdC); (ii) the thickness of the primer layer is in the range 0.01 to 6 µm; (iii) the heat-sealable polymeric layer comprises a copolymer comprising repeating monomeric units of ethylene [-CH<SUB>2</SUB>CH<SUB>2</SUB>-] and one or more types of repeating monomeric units derived from acrylic acid, methacrylic acid and vinyl acetate having the formula [-CH<SUB>2</SUB>C(R<SUP>1</SUP>)(X)-] wherein: X is selected from -COOR<SUP>2</SUP> and -OC(O)CH<SUB>3</SUB>; R<SUP>1</SUP> = H or methyl; and R<SUP>2</SUP> is selected from H, C<SUB>1-10</SUB> alkyl and a counterion M; and (iv) the thickness of the heat-sealable layer is 25 µm or less, methods of manufacture of the same, use of said film as a packaging material for sealing a container and use of a PVdC primer layer in a heat-sealable, peelable composite polymeric film. |
