Use of polylactide and method of manufacturing heat-sealed paper or board container or package

The invention relates to use of polylactide (PLA) as an extruded polymer coating on paper or board intended for the production of containers and packages, which are heated in a stove or microwave oven. According to the invention a polyfunctional cross-linking agent, such as trialkyl isocyanureate (T...

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Bibliographische Detailangaben
Hauptverfasser:	NEVALAINEN KIMMO, KYLLIAINEN OUTI, ROSLING ARI, RASANEN JARI, KHAJEHEIAN MOHAMMAD, RIBU VILLE, LINDSTROM ELLA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON 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 PROCESSES OF COMPOUNDING 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 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 INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention relates to use of polylactide (PLA) as an extruded polymer coating on paper or board intended for the production of containers and packages, which are heated in a stove or microwave oven. According to the invention a polyfunctional cross-linking agent, such as trialkyl isocyanureate (TAIC), is blended with PLA, and the extruded coating layer is subjected to cross-linking electron beam (EB) radiation. PLA may be used as such or blended with another biodegradable polyester such as polybutylene succinate (PBS). EB radiation has been found to improve adhesion of the coating to the paper or board substrate, heat-sealability of the coating, and heat- resistance of the finished containers and packages. 本发明涉及聚交酯(PLA)作为在用于生产容器和包装物的纸或板上的经挤出的聚合物覆盖物的用途，所述容器和包装物在烘炉或微波炉中加热。根据本发明，使多官能性交联剂例如三烷基异氰脲酸酯(TAIC)与PLA共混，并且，使所述经挤出的覆盖物层经受交联电子束(EB)辐射。PLA可原样使用或者与另外的可生物降解的聚酯例如聚丁二酸丁二醇酯(PBS)共混。已经发现，EB辐射改善了覆盖物与纸或板基材的粘附、覆盖物的热封接性能、以及最终容器和包装物的耐热性。