NON-ORIENTED FILM, LAMINATED BODY, AND PACKAGE
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Jan 25, 2023
filing date -
Jan 25, 2023
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Abstract
The present invention relates to a non-oriented film, a laminated body, and a package; the non-oriented film has a sealant layer composed of a resin composition including 30 to 90 mass % of a propylene-based polymer (A) and 10 to 70 mass % of a 1-butene/α-olefin copolymer (B), and a substrate layer; the propylene-based polymer (A) has a melting point (Tm) measured by differential scanning calorimetry (DSC) of 120° C. or higher and 135° C. or lower, and contains 50 to 90 mol % of a propylene-derived constitutional unit; the copolymer (B) has a melting point measured by DSC of lower than 120° C. or has no melting point observed by DSC, and contains 50 to 99 mol % of a 1-butene-derived constitutional unit and 1 to 50 mol % of an α-olefin-derived constitutional unit (provided that a total of the 1-butene-derived constitutional unit and the α-olefin-derived constitutional unit is 100 mol %), the sealant layer has a thickness of 3 to 30 μm, and the substrate layer has a thickness of 10 to 100 μm.
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