PRODUCTION OF RELEASABLE MULTI-LAYER STRUCTURE

PURPOSE:To obtain a desired interlaminar strength, by heating a laminate having a specified layer structure to or above a specified temperature, and then cooling the laminate at a cooling rate so regulated as to control interlaminar strength. CONSTITUTION:A laminate obtained by laminating a layer co...

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Bibliographische Detailangaben
Hauptverfasser:	SHINOHARA TAKESHI, TANAKA KYOJI, FUJIMOTO TANMIN
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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 INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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 SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a desired interlaminar strength, by heating a laminate having a specified layer structure to or above a specified temperature, and then cooling the laminate at a cooling rate so regulated as to control interlaminar strength. CONSTITUTION:A laminate obtained by laminating a layer comprising a polyethylene resin and a layer comprising a polypropylene resin with each other is heated to a temperature in the range from a main melting peak temperature of the polypropylene resin to (the peak temperature) + 135 deg.C. The laminate is then cooled at a regulated cooling rate so as to control the interlaminar strength between the layer comprising the polyethylene resin and the layer comprising the polypropylene resin layer. The layer comprising the polyethylene resin comprises a high density polyethylene, a linear low density polyethylene or the like, and preferably has a main melting peak temperature of 95-135 deg.C. The layer comprising the polypropylene resin comprises polypropylene singly or in admixture with polyethylene. The cooling rate is preferably 10 to 10 deg.C/sec.