JP2000016469A - Delamination container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a failure in discharge due to air leakage from between both inner and outer layers of a pinch-off part in a delamination container for releasing squeeze to open an inlet valve for introducing air between both inner and outer layers, by sticking both inner and outer layers at least at both ends of the pinch-off part on a bottom of a container body. SOLUTION: A container body 11 is manufactured by blow-molding laminate parison comprising an outer layer 21 and an inner layer 22, wherein the outer layer 21 is recovered to keep a predetermined dimension when squeeze is released. If the container body 11 is squeezed on a parting line, distortion grows most in the vicinity of both ends of a pinch-off part 28 which is a border between a center and an outer periphery on its bottom, resulting cracks likely to occur on a pressure-fitted part between the outer layer 21 and the inner layer 22. To overcome this, the outer layer 21 and the inner layer 22 at both ends of the pinch-off part 28 are stuck to each other via an adhesive layer 29. At this time, the adhesive layer 29 extends over a full height range of the container body 11, and two of the layers 29 are provided on a parting line of at least a blow-molding metal mold.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a delamination container.

[0002]

2. Description of the Related Art Conventionally, as a delamination container, Japanese Patent Application Laid-Open
As described in Japanese Patent No. 5566, a container body composed of an outer layer and an inner layer laminated releasably on the outer layer is formed by blow molding, and the container body having an air introduction hole in the outer layer. is there.

However, in this container, in the process of use, the crimping portion between the outer layer and the inner layer of the pinch-off portion at the bottom of the container body is broken, and then, when the container body is squeezed, the atmosphere between the outer layer and the inner layer is released. There is a case where the inner layer does not shrink sufficiently due to leakage from the cracks, so that the contents cannot be discharged. This is due to the fact that the outer layer and the inner layer of the laminated peeling container are originally made of a material that is easily peeled from each other and difficult to adhere to each other, so that the above-described crack is easily generated at the pinch-off portion at the bottom of the container body. Here, the pinch-off portion is a portion provided around the cavity of the blow-molding die, and when the die is closed, the parison is cut off and simultaneously sealed to prevent air from leaking.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a discharge failure caused by air leakage from between the outer layer and the inner layer of the pinch-off portion at the bottom when the container body is squeezed in the laminated peeling container. .

[0005]

According to the present invention, there is provided a laminated peeling container in which a suction valve is opened by releasing a squeeze to introduce air between an outer layer and an inner layer. The outer and inner layers at least at both ends of the pinch-off portion at the bottom of the container body are bonded to each other.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A laminate peeling container 10 comprises a container body 1
1, an inner plug 12, a cap 13, and a valve body 14.

[0007] As shown in FIGS.
It comprises an outer layer 21 and an inner layer 22 which is releasably laminated on the outer layer 21. The container body 11 includes an outer layer 21
And the laminated parison 23 (not shown) of the inner layer 22 is manufactured by blow molding. The outer layer 21 is deformed by the squeeze and is restored when the squeeze is released, so that the outer shape of the container body 11 is maintained. The inner layer 22 is an inner bag that is detachable and deformable from the outer layer 21.

The container body 11 is provided with a valve body 1
A threaded portion 25 for screwing the cap cylinder 41 holding the inner plug 4 and the inner plug 12, and a fitting shoulder 26 to which the inner peripheral portion of the lower end of the cap cylinder 41 of the cap 13 is in close contact are provided. The container main body 11 is provided with an air introduction hole 27 in the outer layer 21 of the mouth portion 24, and when the outer layer 21 is restored, air is introduced between the outer layer 21 and the inner layer 22 to maintain the external shape of the container main body 11. At the same time, the peeling of the inner layer 22 can be advanced.

The inner plug 12 can be fitted into the opening of the mouth 24 of the container body 11, has a discharge passage 31 communicating with the inside of the container body 11, and has an outer peripheral surface of the mouth 24 and the mouth. An intake path 32 is provided which communicates with the air introduction hole 27 via an air inflow path 45 described later between the cap 13 and the inner peripheral surface of the cap cylinder 41 screwed to the cap 24.

The cap 13 is connected to the opening 24 of the container body 11.
And a top lid 42 hinged to the cap cylinder 41. The cap cylinder 41 has a discharge port 44 which can be sealed by a seal 43 of the upper lid 42, and the opening 24 of the container main body 11.
While holding the inner plug 12 and the valve body 14 with the mouth portion 24 of the container body 11 while being screwed to the container body 11,
The inner peripheral portion of the lower end is brought into close contact with the fitting shoulder portion 26 of the mouth portion 24 to form an air inflow passage 45 with the outer peripheral surface of the mouth portion 24. The cap cylinder 41 has a suction port 46 that can be sealed by the suction valve 52 of the valve body 14.

The valve element 14 is held by the cap cylinder 41 of the cap 13 in a state of being fitted to the inner plug 12,
A discharge valve (check valve) 51 that opens the discharge passage 31 only in the content discharge direction to allow the content to be discharged from the discharge port 44, and opens the suction port 46 of the cap 13 only in the air introduction direction. A suction valve (check valve) 52 that allows air to be introduced between the outer layer 21 and the inner layer 22 from the suction path 32, the air inflow path 45, and the air introduction hole 27 is provided.

However, in the case of the laminated peeling container 10, when the container body 11 is squeezed, the outer layer 2 of the pinch-off portion 28 formed by blow molding of the container bottom is formed.
The following configuration is adopted in order to prevent a discharge failure due to air leakage from between the inner layer 1 and the inner layer 22.

When the container body 11 is squeezed on the parting line, the inner pressure of the container caused by the squeezing force near the center of the bottom of the container body 11 is compressed downward at the center of the bottom, and is caused by the squeezing force near the outer periphery of the bottom. The bending force pulls the bottom outer peripheral portion upward, and as a result, the strain near the both ends of the pinch-off portion 28 at the boundary between the bottom central portion and the bottom peripheral portion on the parting line becomes largest, and the pinch-off portion 28 Cracks are likely to occur in the crimped portions of the outer layer 21 and the inner layer 22 near both ends. Therefore, in the present invention, as shown in FIGS. 1 and 2, at least the outer layer 21 and the inner layer 22 at both ends of the pinch-off portion 28 at the bottom of the container body 11 are adhered by the adhesive layer 29. Cracking of the crimped portion between the outer layer 21 and the inner layer 22 that is likely to occur near both ends of the pinch-off portion 28 can be prevented.

Here, in the case of the laminated peeling container 10, a laminated parison 23 (not shown) of the outer layer 21 and the inner layer 22 is manufactured in advance in blow molding. At that time, the container body 1
It is not easy to provide the adhesive layer 29 only on the bottom of the pinch-off portion 28 at the upper end of the pinch-off portion 28 when the laminated parison 23 is extruded. Rather, the container body 1 extends over the entire length of the extrusion.
It is easier to provide the adhesive layer 29 over the entire height range of 1. Therefore, in the present invention, the adhesive layer 29 for bonding the outer layer 21 and the inner layer 22 of the container body 11 is provided on at least a parting line of the blow molding die over the entire height range of the container body 11. And two of them,
The outer layer 21 and the inner layer 22 at both ends of the pinch-off portion 28 at the bottom of the container body 11 can be securely and easily bonded (FIG. 3). 3, (A) is a longitudinal sectional view of the container body 11, (B) is a plan view of the container body 11, and (C) is (A).
(D) is a cross-sectional view of the pinch-off portion 28 of (B) taken along the line DD.

At this time, in the present invention, high-density polyethylene, low-density polyethylene,
When polypropylene or the like is used, nylon, Evar, PET, or the like is used as the material of the inner layer 22. Outer layer 2
When nylon, Evar, PET, or the like is used as the material of the first material, the material of the inner layer 22 is a high-density polyethylene,
Use low-density polyethylene, polypropylene, or the like. As the resin of the adhesive layer, an adhesive polyolefin (trade name: ADMER, etc.) capable of adhering the outer layer 21 and the inner layer 22 is used.

The pinch-off portion 2 at the bottom of the container body 11
In order to prevent the outer layer 21 and the inner layer 22 from being cracked at the press-bonded portion in FIG. 8, at least both end portions of the pinch-off portion 28 after the blow molding of the container body 11, the outer layers 21 facing each other with the parting line interposed therebetween. It may be an adhesive.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, in the practice of the present invention, it is not essential to provide a discharge valve in a laminate peeling container having a high viscosity liquid as a content.

The squeeze container according to any one of claims 1 to 4, wherein the agent application tool is provided, wherein the inside of the handle of the application tool such as a comb, a brush or a brush communicates with the discharge port of the squeeze container. The contents pass through the inside of the handle of the application tool from the squeeze container, and can be applied by discharging and holding the contents between the comb teeth or between the comb teeth.

[0019]

As described above, according to the present invention, it is possible to prevent a discharge failure due to air leakage from between the outer layer and the inner layer of the pinch-off portion at the bottom when the container body is squeezed in the laminated peeling container. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a container main body of a laminate peeling container.

FIG. 2 is a schematic view showing the laminate peeling container as viewed in the direction of arrows along the line II-II in FIG.

FIG. 3 is a schematic view showing a vertical section including a parting line of a container body of the laminated peeling container, a bottom section, a transverse section, and a section of a pinch-off section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Lamination peeling container 11 Container main body 21 Outer layer 22 Inner layer 27 Air introduction hole 28 Pinch-off part 29 Adhesion layer 52 Suction valve

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Mitsugu Iwatsubo 2-1-3 Bunka, Sumida-ku, Tokyo Inside Kao Corporation Research Laboratory (72) Inventor Waka Nobemoto 2-1 Bunka, Sumida-ku, Tokyo 3. In Kao Corporation Research Laboratory (72) Inventor Takayuki Goto 3-2-6 Oshima, Koto-ku, Tokyo F-term in Yoshino Kogyo Co., Ltd. (reference) 3E014 CA02 EA02

Claims (3)

[Claims] 1. A laminated peeling container in which a suction valve is opened by opening a squeeze to introduce air between an outer layer and an inner layer, wherein at least both ends of a pinch-off portion at the bottom of the container body are provided. A laminate peeling container comprising a layer and an inner layer bonded to each other. 2. The method according to claim 1, wherein two adhesive layers for bonding the outer layer and the inner layer of the container body are provided at least on a substantially parting line of a blow molding die over the entire height range of the container body. Item 8. The laminate release container according to Item 1. 3. The laminate peeling container according to claim 1, further comprising an agent applicator.