| 摘要 |
PURPOSE: To facilitate the opening of the container by weakening adherence between the fibrous layer and the inner plastic coating of a packing material in comparison with adherence between a tearing strip in the weakened adhesive region of the sealing fin and a plastic coating. CONSTITUTION: To facilitate the pulling off of a tearing strip 10, a thin layer 16 consists of water glass that weakens adhesion in a region of sealing fin 3 is provided between a carrier layer 11 and an inner plastic coating 12 in a packing material to make the adhesion much weaker than that of the remaining region of the packing material. To open the packed container 1, a dual-wall triangular body 5 seal-adhered to a sidewall 6 is lifted and laid on a plane nearly equal to the upper end surface 4 of the packed container. Then a dangling edge 9 projected at a crossing 7 is grasped to pull out the strip 10 upward, backward and toward right. As a result, the strip 10 is pulled out integrally with the plastic coating 12 that is seal-adhered to its outer coating 15 with a good degree of adhesion, and the carrier layer 11 of the packing material is immediately released along the weakened adhesive region of the sealing fin to expose a spout 17. The packing container 1 can very easily be opened by using the inserted tear strip. |
