Abstract: A heat-adhesive film laminate comprising a film of a plastic material having excellent heat resistance such as polyesters, polyamides or polycarbonates laminated on one side of a metal foil such as aluminum foil, copper foil, iron foil or the like and a film of a resin comprising predominantly block copolyester having a melting point of higher than 140.degree. C but lower than the temperature at which the characteristics of the plastic film is deteriorated and a Young's modulus .epsilon. (dyne/cm.sup.2) and a breaking elongation (.DELTA.l/lo) .times. 100 (%) when measured at 20.degree. C and 100.degree. C being as follows, respectively:10.sup.7 (dyne/cm.sup.2) < .epsilon. < 10.sup.10 (dyne/cm.sup.2) and(.DELTA.l/lo) .times. 100 > 40 (%)laminated on other side of the metal foil.

Abstract: A polyester block copolymer film excellent in slip characteristics and blocking resistance, which is prepared by melt extruding a polyester block copolymer in a film and cooling the film in a melt state at a temperature of about 40.degree. to 120.degree.C to solidify it, the polyester block copolymer comprising crystalline polyester segments and non-crystalline polymer segments in a weight ratio of 99 : 1 to 10 : 90 and having a number average molecular weight of about 10,000 to 100,000, the melting point of a self-supporting high polymer substantially constituted with the monomer components of the said crystalline polyester segments alone being not lower than about 200.degree.C and the melting point or softening point of a polymer substantially constituted with the said non-crystalline polymer segments themselves being not higher than about 80.degree.C.

Abstract: A composite film comprising (A) a biaxially drawn film of a polyamide containing in the molecule not less than 70% (mol) of the repeating unit consisting of metaxylylenediamine or its mixture with paraxylylenediamine (of which the content is not more than 30% (mol) on the basis of the total amount of metaxylylenediamine and paraxylylenediamine) and an .alpha.,.omega.-aliphatic dicarboxylic acid having 6 to 10 carbon atoms and (B) a layer of a thermoplastic resin having a melting point or a softening point at least 50.degree. C. below the melting point or the softening point of the polyamide provided on at least one surface of the biaxially drawn film.