JP3616218B2 - Delamination container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a delamination container having an air inlet hole formed in a container mouth, and more particularly to a structure of a seal part at a container bottom.
[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 is sealed.
[0006]
[Means for Solving the Problems]
In order to achieve the above technical problem, the present invention provides, as a delamination container, a delamination container in which an air inlet hole is provided in a container mouth, a step provided in the peripheral part of the bottom of the container, or a bottom end wall. Adopting a configuration characterized in that the bottom of the container is sealed by adhering a seal material, and a seal protection member comprising a side cylinder wall and a bottom wall in order to protect the seal material adhered to the container The structure characterized by attaching to the lower part of a container trunk | drum and covering a container bottom part is employ | adopted.
[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, A is a delamination container composed of an outer layer 1 and an inner layer 2, and is formed by laminating extrusion blow molding, and the container A includes a container body 3 and a container mouth 4; It consists of a container bottom 5.
B is a sealing material that seals the bottom surface of the delamination container, and C is a seal protection member that is fitted to the body of the container A and protects the seal.
[0008]
The outer layer 1 is made of high-density polyethylene resin and maintains the outer shape of the container, and the inner layer 2 is made of nylon resin and is an inner bag that can be peeled from the outer layer and can be deformed.
The container body 3 includes an upper body 3a and a lower body 3b having a reduced diameter located below the upper body 3a. The boundary between the upper body 3a and the lower body 3b is A step 6 is formed.
A fitting ridge 7 is provided at a position a predetermined distance below the step 6 of the lower body 3 b, and the lower end of the lower body 3 b is connected to the container bottom 5.
[0009]
In the outer layer 1 of the container mouth portion 4, an air introduction hole 8 for introducing air between the outer layer 1 and the inner layer 2 is formed.
Reference numeral 9 denotes a locking piece that prevents the inner layer 2 from sinking when the content liquid is poured out. Reference numeral 10 denotes an adhesive band for adhering a part of the outer layer 1 and the inner layer 2, and restricts the deformation of the inner layer 2 to progress to a certain shape when it is poured out.
[0010]
As shown in FIG. 3, the container bottom part 5 has a bottom end wall 11 connected to the lower body part 3b and a flat bottom wall 12 positioned above the bottom end wall 11, and the flat bottom wall 12 includes a parting wall. A bottom seal portion 13 is formed so as to protrude downward along the line.
The protruding end 13 a of the bottom seal portion 13 is located inside the bottom end wall 11, and a sealing material B is bonded to the bottom end wall 11 so as to seal the container bottom portion 5.
As the sealing material B, a plastic or aluminum laminated sheet is used, and is bonded to the bottom end wall 11 by heat welding.
[0011]
As shown in FIG. 4, the seal protection member C includes a side cylinder wall 20 and a bottom wall 21 and is molded by synthetic resin injection molding.
A fitting groove 23 that engages with the fitting protrusion 7 is provided at a predetermined position from the upper end 22 on the inner periphery of the side cylinder wall 20, and the bottom end wall 11 of the delamination container A is provided on the bottom wall 21. A step portion 24 is provided in pressure contact with the sealing material B adhered to the surface.
The relationship between the seal protection member C and the delamination container A is that when the seal protection member C is mounted on the delamination container A, the upper end 22 of the side cylinder wall 20 is joined to the step 6 of the container body 3 and the side cylinder. The fitting groove 23 of the wall 20 is fitted to the fitting protrusion 7 of the lower body portion 3b, and the step portion 24 of the bottom wall 21 is formed so as to press-contact the sealing material B.
[0012]
Next, the effect based on the said structure is demonstrated.
When using the delamination container A, a pump dispenser is attached to the container opening 4 and the liquid content is poured out by the pump dispenser. At the time of dispensing, the atmosphere is introduced from the atmosphere introduction hole 8 and the inner layer 2 is contracted and deformed. Is done.
At that time, even if a slit due to delamination is formed in the bottom seal portion 13, since the bottom portion is sealed with the sealing material B, the atmosphere is not introduced from the bottom portion, and the atmosphere in the container mouth portion 4 Air can be efficiently introduced from the introduction hole 8.
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.
[0013]
The seal protection member C protects the seal material B adhered to the bottom wall end 11 of the container, and the seal protection member C also serves as a reinforcement of the container. There is no damage.
[0014]
In the above embodiment, the seal material B is protected by the seal protection member C. However, as the seal material, the thickness is increased, a tough material is used, the adhesive surface is widened, or the welding property is increased. It is possible to prevent the seal protection member C from being used by improving the adhesion such as using a good material or an adhesive.
[0015]
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the figure, the delamination container A1 is a delamination container composed of an outer layer 1a and an inner layer 2a, and is composed of a container body 30, a container mouth 31, and a container bottom 32.
As in the first embodiment, the container inlet 31 is provided with an air introduction hole 8a and is provided with a locking piece 9a at the upper end.
[0016]
The container bottom 32 includes a bottom end wall 33 following the container body 30, a step wall 34 formed along the inner periphery of the bottom end wall 33, and a flat bottom located inwardly of the step wall 34. It consists of a wall 35.
The flat bottom wall 35 is formed with a bottom seal portion 36 protruding along the parting line, and the height from the flat bottom wall 35 is lower than the stepped wall 34.
A sealing material B1 is bonded to the stepped wall 34 so as to seal the bottom seal portion 36.
The sealing material B1 is a plastic or aluminum laminated sheet, and is bonded to the entire surface of the stepped wall 34 by heat welding.
[0017]
Next, the operation and effect of the above configuration will be described. As in the first embodiment, since the bottom of the container is sealed with the sealing material, the container is placed between the outer layer and the inner layer when the content liquid is poured out. Air is efficiently introduced from the air introduction hole in the mouth. Since the sealing material B1 is bonded to the entire surface of the stepped wall 34 and is positioned so as to be recessed from the bottom end wall 33, the sealing material B1 is not damaged during transportation or use of the container.
[0018]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists the following effect.
By sealing the container bottom part of the delamination container with a sealing material, it is possible to eliminate the introduction of air from the bottom seal part, and to efficiently introduce air from the air introduction hole provided in the container mouth part. .
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 cross-sectional front view of a delamination container of the present invention.
FIG. 2 is a bottom view of a container in which a part of a seal material and a seal protection member is cut out.
FIG. 3 is a partial cross-sectional side view of the container.
4A and 4B are diagrams showing a seal protection member, in which FIG. 4A is a plan view, and FIG. 4B is a partial cross-sectional front view.
FIG. 5 is a partial cross-sectional front view of a container according to a second embodiment.
FIG. 6 is a bottom view of the container with a part of the sealing material cut away.
[Explanation of symbols]
A, A1 Laminated peeling container B, B1 Sealing material C Seal protective member 1, 1a Outer layer 2, 2a Inner layer 3, 30 Container body 3a Upper body 3b Lower body 4, 31 Container mouth 5, 32 Container bottom 6 step portion 7 fitting protrusion 8, 8a atmosphere introduction hole 11, 33 bottom end wall 12, 35 flat bottom wall 13, 36 bottom seal portion 20 side cylinder wall 21 bottom wall 23 fitting groove 24 step portion 34 step portion wall

Claims (2)

In a delamination container having an air introduction hole at the container mouth, a sealing material is bonded to a stepped part provided at the periphery of the container bottom or a bottom end wall to seal the container bottom. A delamination container. 2. The delamination container according to claim 1, wherein a seal protection member comprising a side cylinder wall and a bottom wall is attached to a lower portion of the container body so as to cover the container bottom.

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