FILM FOR PACKAGING BAG AND PACKAGING BAG FORMED THEREBY

• Main Authors: SHIOMI NOBUO, TSURUSAWA KATSUO
• Format: Patent
• Language: English
• Published: 15.04.1997
• Edition: 6
• 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

PROBLEM TO BE SOLVED: To provide sufficient sealability and reasonable easy-peelability by prescribing the seal strength between film layers which are polymerized and adhered to a base layer of a prescribed thickness made of a synthetic resin. SOLUTION: A base layer A of 15-30μ in thickness made of a synthetic resin, an adhesive layer B, and a printing layer C having easy sealability with the adhesive layer B are uniformly provided in an inter-layer structure. When the base layer A is polymerized and adhered, the seal strength between the film layers is limited to 1.0kgf to 2.0kgf. The base layer is preferably formed of one or more kinds of materials selected from the group consisting of polyethylene, polypropylene, and polyethylene copolymer. When the adhered film is peeled, the breakage of the base layer A reaches the space between the printing layer C and the adhesive layer B, and then, the film is continuously broken from both parts of the printing layer C and the adhesive layer B. Reasonable easy peelability can be obtained in this breaking process, and at the same time, the sufficient seal strength can be secured.