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AssigneeAsahi Kasei Kaisha
InventorsHideki Sakai, Yukiko Katoh
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A vinylidene chloride copolymer film or a laminated film far more excellent in barrier properties than the conventional films provided. A vinylidene chloride copolymer film comprising 88% to 93% by weight of vinylidene chloride and 12% to 7% by weight of at least one monomer copolymerizable with vinylidene chloride and having a ratio (Q/P) of 1.5 or more, wherein Q is the integrated intensity of the peak at 2θ=38° and P is the integrated intensity of the peak at 2θ=15°, each as determined by the wide angle X-ray reflection method, shows excellent barrier properties. Further, a laminated film comprising a base film and a vinylidene chloride copolymer layer which comprises 88% to 93% by weight of vinylidene chloride and 12% to 7% by weight of at least one monomer copolymerizable with vinylidene chloride and which has a ratio (I/J) of 1.4 or above, wherein I and J are the peak intensity and base line intensity at 2θ=38°, respectively, and a half band width of the peak at 2θ=38° of 3° or below, each as determined by the wide angle X-ray reflection method, shows excellent barrier properties.
A method for producing a vinylidene chloride copolymer film or laminated film having excellent barrier properties, which comprises:
A method for producing a vinylidene chloride copolymer film or laminated film having excellent barrier properties, which comprises:
A vinylidene chloride copolymer film having excellent barrier properties, which comprises 88% to 93% by weight of vinylidene chloride and 12% to 7% by weight of at least one monomer copolymerizable with vinylidene chloride and which has a ratio (Q/P) of 1.5 or more, wherein Q is the integrated intensity of the peak at 2θ=38° and P is the integrated intensity of the peak at 2θ=15°, each as determined by the wide angle X-ray reflection method.
A laminated film having excellent barrier properties, comprising a base film and a vinylidene chloride copolymer layer which comprises 88% to 93% by weight of vinylidene chloride and 12% to 7% by weight of at least one monomer copolymerizable with vinylidene chloride and which has a ratio (I/J) of 1.4 or above, wherein I and J are the peak intensity and base line intensity at 2θ=38°, respectively, and a half band width of the peak at 2θ=38° of 3° or below, each as determined by the wide angle X-ray reflection method while the incident X-ray is introduced from the vinylidene chloride copolymer layer side.
Dependencies are inferred from the claim text.