JP3645374B2 - Delamination container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laminate peeling container in which an air inlet hole is formed in a container mouth, and more particularly to a structure of a bottom seal part formed at the container bottom of the laminate peeling container.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a laminate peeling container that is molded by laminate extrusion blow molding, has an air introduction hole formed in a container mouth, and seals a pinch-off portion at the bottom of the container has been known.
[0003]
[Problems to be solved by the invention]
However, in order to improve the peelability between the outer layer and the inner layer in the laminate peeling container, it is necessary to use a resin with low adhesiveness. In the conventional container, a slit due to delamination occurs in the bottom seal part. There was a problem of doing.
Therefore, although it has been proposed to form a welding protrusion on the pinch-off portion (see Japanese Patent Publication No. 6-102076), it is difficult to weld only the outer layer depending on the resin, thus preventing the occurrence of slits. could not.
[0004]
In addition, it has been proposed to fuse the fusion layers forming the protrusions of the bottom seal portion so as to mesh with each other, but the structure of the pinch-off portion of the mold becomes complicated and high accuracy is required. However, there is a problem that the mold cannot be manufactured easily and inexpensively.
[0005]
The present invention solves the above-mentioned problems and has a technical problem to introduce the atmosphere more effectively from the atmosphere introduction hole provided in the container mouth regardless of the structure of the bottom seal part. An object of the present invention is to provide a delamination container in which the bottom seal portion of the adhesive is sealed with an adhesive.
[0006]
[Means for Solving the Problems]
In order to achieve the above technical problem, the present invention, in a delamination container having an air inlet hole at the container mouth, forms a long groove along the parting line on the flat bottom wall formed at the container bottom. A configuration is adopted in which a bottom seal portion is formed so that the end portion does not protrude from the flat bottom wall, and an adhesive layer for bonding and sealing the bottom seal portion is provided in the long groove.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, reference numeral 1 denotes a laminated peeling container composed of an outer layer 2 and an inner layer 3, which is formed by laminated extrusion blow molding.
The outer layer 2 is made of high-density polyethylene resin and maintains the appearance of the container. The inner layer 3 is made of nylon resin and is an inner bag that can be peeled from the outer layer and can be deformed.
The delamination container 1 includes a circular container body 4, a container mouth part 5, and a container bottom part 6. The outer layer 2 of the container mouth part 5 has air between the outer layer 2 and the inner layer 3. An air introduction hole 7 to be introduced is formed.
Reference numeral 8 denotes a locking piece that prevents the inner layer 2 from sinking when the content liquid is poured out. Reference numeral 9 denotes an adhesive band for bonding a part of the outer layer and the inner layer, and restricts the deformation of the inner layer to progress to a certain shape when the content liquid is poured out.
[0008]
The container bottom 6 has a bottom end wall 10 and a flat bottom wall 11 formed at a position recessed inward from the bottom end wall 10.
On the flat bottom wall 11, an elliptical long groove 12 is formed along the parting line. A bottom seal portion 13 is formed on the bottom surface of the long groove 12, and its protruding end 14 is drawn from the surface of the flat bottom wall 11. positioned.
[0009]
As shown in FIGS. 3 and 4, an adhesive layer 15 is formed in the long groove 12 so as to cover the bottom seal portion 13, and the adhesive layer 15 is applied by post-processing after blow molding of the delamination container. Is done.
As the adhesive, an appropriate hot melt adhesive is used depending on the resin of the inner and outer layers of the container, but it is preferable to flow a hot melt adhesive of the same material as the outer layer into the long groove 12.
[0010]
Next, the effect based on the said structure is demonstrated.
When using the delamination container, a pump dispenser is attached to the container mouth portion 5 and the content liquid is poured out by the pump dispenser. At the time of dispensing, the atmosphere is introduced from the atmosphere introduction hole 7 and the inner layer 3 is contracted and deformed. The
At that time, since the bottom seal portion 13 is bonded and sealed by the adhesive layer, air is not introduced from the bottom seal portion 13, and air is efficiently introduced from the air introduction hole 7 of the container mouth portion 5. Can do.
Further, even when the container is used in a wet place such as a bathroom, hot water does not enter the container together with air from the bottom seal portion 13.
[0011]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists the following effect.
Since the bottom seal part at the bottom of the delamination container is covered and sealed with an adhesive layer, the introduction of air from the bottom seal part can be eliminated, and it is more efficient than the air introduction hole provided in the container mouth part. The atmosphere can be introduced into
Regardless of the structure of the bottom seal part, it is possible to prevent the introduction of air from the bottom seal part, so there is no need to form a protrusion with a special structure on the bottom seal part, making the delamination container easy and low cost. Can be manufactured.
[Brief description of the drawings]
FIG. 1 is a partial sectional front view of a delamination container.
FIG. 2 is a bottom view of the container.
FIG. 3 is a partial cross-sectional side view of a container provided with an adhesive layer.
FIG. 4 is a bottom view of a container provided with an adhesive layer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lamination peeling container 2 Outer layer 3 Inner layer 4 Container trunk | drum 5 Container mouth part 6 Container bottom part 7 Atmospheric introduction hole 10 Bottom end wall 11 Flat bottom wall 12 Long groove 13 Bottom seal part 15 Adhesive layer

Claims (1)

In a delamination container with an air inlet hole at the container mouth, a long groove is formed along the parting line on the flat bottom wall formed at the bottom of the container, and a bottom seal is provided so that the end does not protrude from the flat bottom wall. A laminated peeling container comprising an adhesive layer that is formed and adhesively seals a bottom seal portion in the long groove.

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