Patent ID: 6737171
Filing Date: 2004-05-18
Classification: B32B,C08F,C08J,C08L,Y10T

Abstract:
A multi-layered laminate film comprising at least one layer of a propylenic random copolymer of propylene and ethylene that satisfies the following conditions (1) to (5):(1) the ethylene unit content (x, wt. %) of the copolymer is from 0.2 to 10 wt. %; (2) the copolymer has a melt index (MI, g/10 min) of from 0.1 to 4 g/10 min.; (3) the relation between the boiling diethyl ether extraction (E, wt. %) of the copolymer and x satisfies the formulae (I) or (II) E&lE;0.25x+1.1 (0.2&lE;x<6)â€ƒâ€ƒ(I) E&lE;2.6 (6&lE;x&lE;10)â€ƒâ€ƒ(II); (4) the relation between the melting point (Tm, Â° C.) of the copolymer as measured with a differential scanning calorimeter and x satisfies the formula (III): Tm&lE;165âˆ’5x; andâ€ƒâ€ƒ(III) (5) the isotactic triad fraction (mm, mol %) in the PPP sequence of the copolymer, as measured in 13C-NMR, is not smaller than 98.0 mol %.