Packaging laminate, manufacturing method thereof and packaging container manufactured from the packaging laminate

Patent name Packaging laminated board, its manufacturing method and packaging container made from the packaging laminated board Patent applicants Lila Laval Group and Finance Co., Ltd. Principal applicant Address N. Toft, inventor of Puli, Switzerland; T. Anderson Application (Patent) No. 38310314.1 Date of Application 2003.04.29 Approval Date Approval Notice No. 1652934 Date of Publication Approval 2005.08.10 Specification CD-ROM D0532 Main Classification Number B32B27/32 Classification Number B32B27/32; Part B65D65/40 Original Application Number Priority 2002.5.7 SE 0201396-9 Abstract A packaging laminate (10) comprising a paper or cardboard core (11) with penetrating holes, a thermoplastic layer (12) applied on the outside of the core, An aluminum foil (13) coated on the other side, the inner side of the core, and bonded to the core by means of a thermoplastic intermediate layer (14). The two thermoplastic layers (12, 14) are sealed to each other in the hole area to form an aluminum foil and a thermoplastic. The film, and the first adhesive sublayer (15-1) applied to the inside of the aluminum foil, and the intermediate sublayer applied to the adjacent first adhesive sublayer including a material providing a barrier to the migration of free fatty acid (15) -2), and main packages Metallocene polyethylene (m-PE) is the innermost sub-layer (15-3). The packaging laminate has improved sealing properties and provides improved or maintained packaging integrity and openability for packaging containers with openers for the aseptic, long-term storage of, for example, juices, made from the laminate. The opening device removes the film of the aluminum foil and the thermoplastic laminate layer from the hole area of ​​the core layer when the opening device is opened. Preferably the material that provides a barrier to the migration of free fatty acids is a cyclo-olefin copolymer (COC) and/or a filler. Sovereign Items 1. Packaging laminate (10) comprising a paper or cardboard core (11) with penetrating holes, openings or slits, a thermoplastic layer (12) applied on the outside of the core, applied On the other side of the core is the inner foil (13), which extends across the laminate and is bonded to the core through the thermoplastic interlayer (14). Both thermoplastic layers (12, 14) are in the entire The laminate extends and forms a film of aluminum foil (13) and thermoplastic layer (12, 14) in the pore region and seals one another, and one or more layers of thermoplastic material applied on the other side of the aluminum foil, ie, on the inside. The layer or layers of thermoplastic material include at least one layer of adhesive (15-1) applied adjacent to the aluminum foil, an intermediate sublayer (15-2) that provides a material to block the migration of free fatty acids, and mainly includes so-called Metallocene polyethylene (m-PE), the innermost sublayer (15-3) of an ethylene-alpha olefin copolymer polymerized in the presence of a metallocene catalyst. International Application PCT/SE2003/000690 2003.4.29 International Publication WO2003/095200 English 2003.11.20 Date of Entry into the Country Patent Agency China Patent Agency (Hong Kong) Limited Agency Address Agent Zou Xuemei;Pang Lizhi