| 摘要 |
A laminated film produced by a co-extrusion inflation method comprising: An outermost layer, (A), comprising a polybutylene terephthalate homopolymer, a polybutylene terphthalate copolymer, or a mixture of both; and An innermost layer, (B), comprising a heat-sealing resin. The outermost layer has a shape factor of at least 2.2, having a peak shape of Raman spectrum thereof and is represented by the formula: Shape factor = La/Lb wherein La and Lb represent peak widths being present on higher- and lower-frequency sides respectively, relative to a perpendicular line drawn from a peak to a base line, formed by a tangent line taken before and after the peak based on carbonyl stretching vibration, and being taken along a horizontal line at a height corresponding to one half of an intensity of the peak.
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