Packaging container and method for manufacturing the same

摘要

To provide, with a simple construction, a packaging container by which leakage can be prevented, and breakage of the packaging container and flying-out of the contents accompanying the pressure rise in the inside of the container accompanying the warming can be prevented in warming the contents together with the container body.;An internal space 2 for storing contents F is formed by a laminate film 1. A circumferential end part of the laminate film 1 is subjected to a thermal fusion treatment to form a sealed portion 3 (3a to 3c). In laminate film 1, a first slit Sa having a predetermined length is formed so as to intersect a part of the sealed portion 3b. A second adhesive layer Lb is disposed in a region having a predetermined width in a neighborhood of the first slit Sa.

主权项

1. A packaging container having a laminate film formed by laminating a plurality of thin-layer films, so as to form an internal space for storing contents, in which at least a part of a circumferential end part of the laminate film is subjected to a thermal fusion treatment to form a sealed portion, wherein
the laminate film is formed of at least two or more thin-layer films comprising a first inner layer that is in contact with the internal space and a second inner layer that is in contact with an outer side surface of the first inner layer, and has a first adhesive layer having a first adhesive agent applied thereon and disposed between the first inner layer and the second inner layer; a first slit having a predetermined length is formed in the first inner layer so as to intersect a part of a fused portion of the circumferential end part subjected to the thermal fusion treatment, and a second adhesive layer having a second adhesive agent, which has a lower melting temperature than the first adhesive agent, applied thereon instead of the first adhesive agent is disposed in a region having a predetermined width in a neighborhood of the first slit; and, in a state in which the internal space is subjected to warming and an internal pressure thereof is raised, the second adhesive layer is melted by the warming and/or by a warmed vapor to generate a space part between the first inner layer and the second inner layer in the neighborhood of the first slit and to form an opening by the first slit wherein a first outer circumferential portion having the second adhesive layer is formed at a site located on a further outer circumferential side of the fused portion of the circumferential end part and on an outer circumferential side of one end of the first slit and, in a state in which the internal space is subjected to warming and an internal pressure thereof is raised, the second adhesive layer in the neighborhood of the first slit is melted by the warming and/or by a warmed vapor to generate a space part between the first inner layer and the second inner layer so as to form an opening in the first slit and in the first outer circumferential portion, and the laminate film can be peeled off from the opening formed in the first slit and in the first outer circumferential portion, whereby the contents can be taken out from the internal space.