MULTIPLE LAYER PACKAGING FILMS AND PACKAGES FORMED THEREOF

• Main Authors: JEAEN ELIZABETH RANIERE, RUSSELL PAUL GEHRKE, RICHARD EUGENE JOHNSON, STEVEN LOUIS SMITH
• Format: Patent
• Language: English
• Published: 23.12.1987
• Edition: 4
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A multilayer film which can be used for packaging, and packages which are produced therefrom, with the first layer in the film being a material which contains an ester group, a polycarbonate or a polyether block amide copolymer. The second layer in the film is a sealable, preferably polypropylene, polymer which is mixed with an elastic styrene-ethylene-butylene-styrene copolymer. A third functionally adhesive layer is placed between the first layer and the second layer. The composition of the third adhesive layer is typically either a polypropylene which is modified with a carboxyl group, such as an organic acid, or an anhydride or a styrene-ethylene- butylene-styrene copolymer.