Heat-sealable propylene-based polymer composition, heat-sealable film, and uses thereof

• Main Authors: MARUYAMA KAZUHIDE, TAKEISHI ICHIRO, INOUE NORIHIDE, HOYA HIROSHI
• Format: Patent
• Language: English
• Published: 23.08.2011
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; 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; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

The present invention is directed to a heat-sealable propylene-based polymer composition comprising a propylene polymer composition including a propylene polymer component and propylene/ethylene random copolymer component; an ethylene/α-olefin random copolymer; and a soft propylene polymer composition. The present invention also provides a heat-sealable film using the composition and a packaging bag comprising the film. The heat-sealable film of the present invention has high heat-seal strength, with little decrease in heat-seal strength even after heat treatment. The heat-sealable film also has excellent blocking resistance, rigidity and low-temperature impact resistance.