CAN BODY FOR HEAT SEAL CONTAINER AND HEAT SEAL CONTAINER

• Main Authors: KATO SATOSHI, IWAKIRI KAZUFUMI, KADOWAKI NOBUO, MIZUTANI TOMOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2019
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

To provide a heat-sealable can body for food, excellent in takeout of contents, having good openability, heat-sealable in a short time and excellent in productivity.SOLUTION: The opening end of an upper portion of a can body has a face directly heat-sealable with a lid member made of resin-laminated aluminum foil, and a film on the inner surface of the can continuously covers the surface of a steel plate up to the opening end. The film on the heat-sealed surface of the can body has a polyethylene-based resin added polypropylene resin layer, a polypropylene-based resin layer and a modified polypropylene resin layer, arranged in the order from the side contacting the resin-laminated aluminum foil for the lid. The film on the opposite side of heat-sealing of the heat-sealing part of the can body is thermoplastic polyester resin of which melting temperature is higher than that of the polypropylene-based resin on the heat-sealing side by 40°C and also is higher than heating temperature of a heat-sealing tool.SELECTED DRAWING: Figure 6 【課題】内容物の取り出し性、開缶性に優れ、短時間でヒートシール可能であり、製造性に優れる食品容器用のヒートシール缶体を提供する。【解決手段】缶体上部の開口端が樹脂ラミネートアルミ箔製の蓋材と直接ヒートシールできる面を有しており、缶内面側のフィルムが開口端まで連続して鋼板表面を覆う構造であり、缶体のヒートシール面のフィルムが蓋用樹脂ラミネートアルミ箔と接する側から順にポリエチレン系樹脂添加ポリプロピレン系樹脂層、ポリプロピレン系樹脂層、変性ポリプロピレン系樹脂層で構成されており、缶体のヒートシール部のヒートシール側と反対面のフィルムがヒートシール側のポリプロピレン系樹脂よりも融点が４０℃以上高く、ヒートシール用のツールの加熱温度より高融点である熱可塑性ポリエステル樹脂である。【選択図】図６