Title:
包装積層材、その製造方法、及びその包装積層材から製造された包装容器
Document Type and Number:
Japanese Patent JP2005524586
Kind Code:
A
Abstract:
A packaging laminate comprising a core layer of paper or carton with a through-going hole, a layer of thermoplastics applied onto one outer side of the core layer, an aluminum foil applied onto the other, inner, side of the core layer and bonded to the core layer by means of an intermediate layer of thermoplastics, the two layers of thermoplastics being sealed to each other within the region of the hole to form a membrane of aluminum foil and thermoplastics, and a first adhesive part-layer applied onto the inner side of the aluminum foil, an intermediate part-layer comprising a material providing barrier properties towards migration of free fatty acids, applied adjacent to the first adhesive part-layer, and an innermost part-layer comprising in the majority a metallocene polyethylene. The packaging laminate has improved sealability properties and provides improved or maintained package integrity and openability to a packaging container manufactured from the laminate, for the purpose of aseptic, long-term storage of for example fruit juice, having an opening arrangement, which at opening removes the membrane of laminated layers of aluminum foil and thermoplastics from the region of the hole in the core layer. Preferably, the material providing barrier properties towards migration of free fatty acids is a cyclo-olefin copolymer and/or a filler.
Inventors:
Toft, Nils
Anderson, Torbiern
Anderson, Torbiern
Application Number:
JP2004503257A
Publication Date:
August 18, 2005
Filing Date:
April 29, 2003
Export Citation:
Assignee:
Tetra Laval Holdings Financiers Society Anonym
International Classes:
B32B3/24; B32B15/08; B32B15/085; B32B27/10; B65D5/74; B65D65/40; C08L23/08; (IPC1-7): B65D65/40; B32B15/08; B65D5/74
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Katsunori Ando
Takamatsu Takefu
Hajime Asamura
Katsunori Ando
Takamatsu Takefu