B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 30/02 (2006.01) B32B 27/30 (2006.01) B32B 27/32 (2006.01) B65D 65/40 (2006.01)
Patent
CA 2585971
[PROBLEMS] To provide a bag which can be easily opened linearly in the direction same as the direction in which the bag has been opened and from which the contents can be more easily taken out without fail. Disposition of an aluminum foil as an inner layer brings about an excellent moistureproof effect to improve the storage stability of the contents. [MEANS FOR SOLVING PROBLEMS] The bag is characterized by comprising a layered film comprising a biaxially stretched polystyrene film comprising an amorphous polystyrene copolymer resin and having a Vicat softening temperature of 110-155~C and a polyethylene film, the biaxially stretched polystyrene film being disposed on the outer side of the bag and the polyethylene film being disposed on the inner side thereof. The bag may be characterized by including an aluminum foil disposed as an inner layer. This constitution produces an excellent moistureproof effect to improve the storage stability of the contents.
L~invention propose un sac que l'on peut ouvrir facilement de façon linéaire et permettant d~en extraire le contenu plus facilement. La disposition d~un film d~aluminium comme couche interne produit un excellent effet d~étanchéité à l~humidité pour améliorer la stabilité de stockage du contenu. Le sac est caractérisé en ce qu~il comprend un film en plusieurs couches contenant un film de polystyrène étiré dans les deux axes renfermant une résine de copolymère polystyrène amorphe et possédant une température de ramollissement Vicat de 110-155°C et un film de polyéthylène, le film de polystyrène étiré dans les deux axes étant disposé sur le côté externe du sac et le film de polyéthylène étant disposé sur le côté interne de celui-ci. Le sac peut être caractérisé en ce qu~il inclut un film d~aluminium disposé comme couche interne. Cette constitution produit un excellent effet d~étanchéité à l~humidité pour augmenter la stabilité de stockage du contenu.
Kato Kazufumi
Mizutari Yuuji
Asahi Kasei Chemicals Corporation
Goudreau Gage Dubuc
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