Patent ID: 7189347
Filing Date: 2007-03-13
Classification: B29C,B29K,B32B,Y10S,Y10T

Abstract:
1. A film consisting essentially of (a) a biaxially oriented polyamide laminate film having a layered structure of A/B, A/B/A, or A/B/C, (b) an anchor coat layer consisting essentially of an aqueous polyester resin that is formed on at least one surface of the laminate film, and (c) a sealant layer consisting essentially of polyolefin resin that is formed on the anchor coat layer, layer A having no projections with a height of 0.27 μm or higher on the surface, or having a density of projections with a height of 0.27 μm or higher present on the surface of less than 200 projections/mm the laminate film exhibiting a maximum dimensional change of 4% or less during immersion in 95° C. hot water, a maximum dimensional change of 6% or less after withdrawal from said hot water, and a maximum dimensional change of 4% or less after heat treatment in dry hot air at 160° C., wherein layer A comprises i) a composition containing X, or ii) a composition containing X and Y; layer B comprises iii) a composition containing Y, iv) a composition containing Y and X, v) a composition containing Y and Z, or vi) a composition containing X, Y and Z; layer C comprises vii) a composition containing X, viii) a composition containing Y, or ix) a composition containing X and Y, wherein X is 1) a resin composition which is a mixture of (a) an aromatic polyamide resin obtained by reacting a terephthalic acid with an aliphatic diamine, and/or an aromatic polyamide resin obtained by reacting an adipic acid and meta-xylylenediamine, and (b) an aliphatic polyamide resin, wherein the aromatic polyamide resin (a) is contained in an amount of 10 mol % or more; or 2) a resin composition which is a copolymer of the monomers of (a) and the monomers of (b), wherein the monomers of (a) are contained in an amount of 10 mol % or more; wherein Y is an aliphatic polyamide resin; wherein Z is an improver of resistance to fatigue from flexing.