MULTI-LAYER SEMI-RIGID SHEET MATERIAL WITH HIGH THERMAL RESISTANCE FOR THE MANUFACTURE BY FOLDING OF PRODUCT PACKAGING CONTAINERS

• Main Authors: CLAEYS CHRISTIAN, RANCHON DENIS
• Format: Patent
• Language: English
• Published: 06.08.2009
• 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; 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; MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS; MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNERANALOGOUS TO PAPER; MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN AMANNER ANALOGOUS TO PAPER; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; 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; TRANSPORTING; UNPACKING; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUSTO PAPER

The invention relates to a process for obtaining a multilayer material [10] consisting of semi-rigid sheets with good hold, resistance to temperatures in excess of 124° C. and low gas permeability which can be folded and intended for the manufacture by folding of containers [20] constituting an internal space for the packaging of thermally treated products, such a container [20] a process for obtaining such a multilayer material; [10] and a process for manufacturing the product packaging. The multilayer material [10] is comprised of at least one external layer [11] of polymer material and one internal layer [12] of polymer material between which the multilayer material [10] has low permeability to gases such that there is a positive humidity sensitivity gradient [14, 13] of the gas permeability from the inside towards the outside, this gradient allowing drying of the multilayer material [10] by evaporation towards the outside during stabilisation of the multilayer material [10] following thermal processing of the packaged products.