Hoja de metal revestida con resina orgánica, método de fabricación de la misma, y lata de metal y tapa de lata hechas por procesamiento de la hoja de metal revestida con resina orgánica

• Main Authors: KASAHARA, Shinichi, IKEBUCHI, Masashi, UCHIDA, Masayuki, FUKUNAGA, Tomonori, KAWAMURA, Satoshi, KANZAKI, Keizou, FUNAGI, Yuji
• Format: Patent
• Language: Spanish
• Published: 04.11.2021
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; ADHESIVES; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; 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; CORRECTING FLUIDS; DYES; FILLING PASTES; 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; INKS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Una hoja de metal revestida con resina orgánica en la que se superpone una película no estirada sobre al menos una superficie única de una hoja de metal, caracterizándose la hoja de metal revestida con resina orgánica por que la película no estirada está compuesta por una composición de resina a base de poliéster obtenida por combinación del poliéster copolimerizado (I) compuesto principalmente por una resina a base de poli(tereftalato de etileno) con poliéster cristalino (II) compuesto principalmente por una resina a base de poli(tereftalato de butileno) con una cantidad de mezcla del poliéster cristalino (II) de 20 a 45% en peso, en donde una altura H de un pico de recristalización en una disminución de temperatura en la calorimetría diferencial de barrido (DSC) de la película no estirada superpuesta sobre al menos la superficie única de la hoja de metal está en un intervalo de 0.8 mW <= H <2.0 mW. An object of the present invention is to provide an organic-resin-coated metal sheet for beverages and foods having retort blushing resistance and can manufacturability, a manufacturing method thereof, and a metal can and a can lid that are made by processing the organic-resin-coated metal sheet. An organic-resin-coated metal sheet of the present invention is an organic-resin-coated metal sheet in which an unstretched film is stacked on at least a single surface of a metal sheet, and is characterized in that the unstretched film is composed of a polyester-based resin composition obtained by blending copolymerized polyester (I) composed mainly of a polyethylene terephthalate-based resin with crystalline polyester (II) composed mainly of a polybutylene terephthalate-based resin with a mixing amount of the crystalline polyester (II) of 20 to 45 wt%.