MULTILAYER FILM
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United States of America Patent
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Issued Date -
Oct 17, 2024
app pub date -
Jul 19, 2022
filing date -
Jul 19, 2022
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Abstract
A multilayer film includes: a surface layer composed of a resin composition containing vinylidene fluoride-based resin and methacrylic acid ester-based resin; and a back layer laminated on the surface layer composed of a resin composition containing vinylidene fluoride-based resin and methacrylic acid ester-based resin, and further containing fine particles with a particle diameter of 0.2 μm or more; wherein an average particle diameter of the fine particles is less than 1.0 μm, a number of convex portions existing on an outer surface of the back layer having a height of 0.2 μm or more relative to an average surface that is counted using a white interferometer is 400 or less per area of 697 μm×539 μm, and a number of convex portions having a height of 1.0 μm or more is 10 or less per area of 697 μm×539 μm.
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