BIAXIALLY STRETCHED POLYPROPYLENE-BASED FILM

• Main Authors: YOTSUMOTO TARO, KAWAMURA SHIGEO, KINOSHITA YUSUKE, TAJIMA TOMOKI, KURAMOTO NAOHIKO, HASHIMOTO HIDEO
• Format: Patent
• Language: English; Japanese
• Published: 25.01.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

To provide a biaxially stretched polypropylene-based film which is difficult to generate film breakage, has good re-paper feeding property, and is excellent in cold impact resistance.SOLUTION: A biaxially stretched polypropylene-based film includes at least a base material layer B containing 14.0-73.2 mass% of a polypropylene-based resin (B1), 8.0-37.0 mass% of a metallocene catalyst-based propylene-α-olefin copolymer (B2), and 18.8-49.0 mass% of a polyethylene-based resin (B3).SELECTED DRAWING: None 【課題】フィルム破れが発生し難く、再通紙性が良好であり、かつ耐寒衝撃性に優れる二軸延伸ポリプロピレン系フィルムを提供することを目的とする。【解決手段】ポリプロピレン系樹脂（Ｂ１）１４．０～７３．２質量％と、メタロセン触媒系プロピレン－αオレフィン共重合体（Ｂ２）８．０～３７．０質量％と、ポリエチレン系樹脂（Ｂ３）１８．８～４９．０質量％を含む基材層Ｂを少なくとも備える、二軸延伸ポリプロピレン系フィルム。【選択図】なし