JP3824659B2 - container - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a container made of polyethylene terephthalate (hereinafter abbreviated as PET).
[0002]
[Prior art]
PET containers are widely used in all fields. In recent years, the gas barrier property, which has been regarded as a problem of PET, has been improved, and the applications of PET containers are further expanded.
[0003]
[Problems to be solved by the invention]
As described above, although PET is excellent in gas barrier properties, it is slightly inferior in the property of transmitting moisture (water vapor), that is, moisture permeability.
[0004]
Therefore, for example, when used as an aerosol container, the inside of the container may be in a pressurized state, and not only the water vapor of the content filling the container permeates the container but the content is reduced. There was a problem that the balance of pressure and the balance of contents were lost.
[0005]
Further, when used as a container for tablets, there has been a problem that the tablet is squeezed because external moisture penetrates the container and enters. This was particularly a problem with tablets that hate moisture.
[0006]
The present invention has been made in view of the problems of the prior art as described above, and an object of the present invention is to provide a PET container excellent in the property of not allowing water vapor to permeate (hereinafter referred to as moisture barrier property). .
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following configuration. The container of the present invention comprises (a) a single-layer container body made of PET and having a head portion having a spout connected at the neck, and (b) a resin having a better moisture barrier property than PET. And an exterior body that surrounds. Then, the outer body is composed of a cylindrical sleeve having a flange portion with an open top, and a bottom frame that closes the lower portion of the sleeve, and the container body is accommodated inside the outer body, and the container body The head is protruded from the opening of the collar, and the collar of the exterior body is fixed to the neck of the container body in a sealed state by a band.
[0008]
Or (b) a single-layer container body made of PET and having a head portion having a spout connected by a neck, and (b) an exterior made of a resin having better moisture barrier properties than PET and surrounding the container body from the outside. A cylindrical sleeve having a collar portion with an open top, and a bottom frame that closes a lower portion of the sleeve, and the container body is disposed inside the exterior body. Accommodating, projecting the head of the container body from the opening of the collar, fixing the collar of the exterior body in a sealed state to the head of the container body by a fastening ring, and providing an uneven portion on the head, A resin packing is interposed between the uneven portion and the fastening ring.
[0009]
In addition, it is also possible to laminate | stack the resin layer which consists of resin excellent in moisture-shielding property rather than PET on the outer surface of the said container main body, and this resin layer can be used as an exterior body. The exterior body can be made of, for example, polyethylene or polyolefin, but is not limited to this, and various resins having better moisture barrier properties than PET can be used.
[0010]
The container of the present invention is not particularly limited in use, but is particularly effective when used as an aerosol container or a moisture-proof container.
[0011]
[Action]
The container body made of PET has excellent gas barrier properties. Therefore, it is possible to prevent the inside of the container body from being inadvertently reduced in pressure, the scent inside the container body to escape to the outside, and oxygen from entering the container body from the outside.
[0012]
Although water vapor permeates a relatively large amount of the container body made of PET, the exterior body made of a resin having excellent moisture barrier properties transmits water vapor based on the water vapor barrier rate of each moisture barrier resin. Therefore, water vapor does not enter the container from the outside.
[0013]
As for the water vapor in the container main body, when the exterior body is constituted by a resin layer laminated on the outer surface of the container main body, the water vapor in the container main body cannot permeate the outer surface of the container main body. Cannot penetrate the container body. When the exterior body is formed in a cylindrical shape separate from the container body, the water vapor in the container body that has permeated through the container body remains between the container body and the exterior body, and the water vapor pressure is maintained in the container body. When equilibrated with the water vapor pressure, the permeation of water vapor from inside the container body stops.
[0014]
【Example】
Embodiments of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a cross-sectional view of a container according to the present invention. The container 1A includes a container body 10 and an outer cylinder (exterior body) 20, and is a self-supporting container.
[0015]
The container main body 10 is made of PET, and includes a hemispherical bottom portion 11, a cylindrical body portion 12, a shoulder portion 13 made of a part of a sphere, and a head portion 14 having a spout. . The base of the head 14 is a neck 15.
[0016]
The outer cylinder 20 is formed of polyethylene (hereinafter abbreviated as PE), and includes a sleeve 30 and a bottom frame 40. The sleeve 30 includes a cylindrical body portion 31 having a lower opening, a shoulder portion 32 formed of a part of a sphere, and a flange portion 34 having an opening 33 at the upper end. The inner diameter of the body 31 of the sleeve 30 is substantially the same as or slightly larger than the outer diameter of the body 12 of the container body 10, and the radius of curvature of the inner surface of the shoulder 32 of the sleeve 30 is The diameter of the curvature circle of the outer surface of the shoulder portion 13 of the container body 10 is substantially the same as or slightly larger than that, and the inner diameter of the collar 34 is slightly larger than the outer diameter of the neck 15 of the container body 10. Has been.
[0017]
The container body 10 is inserted from the lower opening of the body portion 31 of the sleeve 30, and the head 14 is protruded from the opening 33 by elastically expanding the opening 33 of the sleeve 30. The shoulder 13 of the container body 10 is in close contact with the shoulder 32 of the sleeve 30, and the body 12 of the container body 10 is in close contact with the body 31 of the sleeve 30. The collar portion 34 of the sleeve 30 is fixed to the neck portion 15 of the container body 10 in a sealed state by a band 50.
[0018]
The bottom frame 40 has a disk shape having the same diameter as the outer diameter of the sleeve 30, and after the container body 10 is accommodated in the sleeve 30, the bottom frame 40 is welded to the bottom of the sleeve 30 in a sealed state. A space 60 is formed between the bottom frame 40 and the bottom 11 of the container body 10. In this embodiment, the bottom frame 40 is also made of PE. However, the bottom frame 40 may be made of another material and laminated with aluminum so as to maintain moisture barrier properties.
[0019]
FIGS. 2 and 3 each show another aspect of the bottom frame 40, and the bottom frame 40 is provided with a protruding portion 41 that immerses into the sleeve 30. In the case of FIG. 2, the projecting portion 41 is provided with a concave spherical surface 42, and the bottom portion 11 of the container body 10 is brought into surface contact with the concave spherical surface 42. In the case of FIG. 3, the upper portion of the protruding portion 41 is formed on the flat surface 43, and the bottom portion 11 of the container body 10 is received by the flat surface 43.
[0020]
FIG. 4 shows another fixing means of the flange portion 34 of the sleeve 30, and the front portion of the flange portion 34 of the sleeve 30 and the head portion 14 of the container body 10 are connected by an aluminum fastening ring 51. , And caulked and fixed in a sealed state. In this case, a resin packing 52 is interposed between the head 14 of the container main body 10 and the fastening ring 51 so as to maintain the sealing performance therebetween.
[0021]
FIG. 5A is an external perspective view when the container 1A is used as an aerosol container 100A, and a spray device 70 is attached to the head of the container body 10. Thus, an effect | action at the time of using as a container for aerosol is demonstrated with reference to FIG. In the case of an aerosol, the container body 10 is filled with the contents in a pressurized state, and a part thereof is water vapor.
[0022]
Since PET is excellent in gas barrier properties, the gas does not escape from the inside of the container body 10 and the internal pressure does not drop, and the scent in the container body 10 does not escape to the outside. On the other hand, since PET is slightly inferior in moisture barrier properties, the water vapor in the container body 10 can pass through the container body 10 relatively much. However, since PE is excellent in moisture barrier properties, it is difficult for water vapor that has passed through the container body 10 to pass through the outer cylinder 20. Therefore, the water vapor that has passed through the container body 10 remains in the space 60 between the container body 10 and the outer tube 20, the rate of transmission to the outside of the outer tube 20 is very small compared to PET alone. Then, when the water vapor pressure in the space 60 is balanced with the water vapor pressure in the container body 10, the water vapor does not permeate the container body 10, and thereafter there is no permeation of water vapor. As a result, the contents filled in the container body 10 are less likely to be reduced when not in use, and the reduction rate is ½ to 1/10 compared to a PET single container, and the shelf life is reduced. It will be 2-10 times longer.
[0023]
FIG. 5B is an external perspective view when used as a non-self-supporting aerosol container 100B. The outer cylinder 20 in this case has a soft tube shape, and its bottom is welded flat. Since the structure, operation, and effect of the other parts are the same as those of the self-supporting container 100A, the description thereof is omitted.
[0024]
In each of the above-described embodiments, the exterior body may be configured by the outer cylinder 20 that is separate from the container body 10.
[0025]
【The invention's effect】
As described above, according to the present invention, the container includes a container body made of PET and an exterior body made of a resin having a moisture barrier property superior to that of PET, so that the moisture barrier property and the gas barrier property can be obtained. It will be excellent for both.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a container according to a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional view showing another embodiment of the bottom of the container of the present invention.
FIG. 3 is a partial cross-sectional view showing another embodiment of the bottom of the container of the present invention.
FIG. 4 is a partial cross-sectional view showing another aspect of the head in the container of the present invention.
FIGS. 5A and 5B are external perspective views when the container of the present invention is an aerosol container. FIG.
[Explanation of symbols]
1A Container 1B Container 10 Container body 13 Shoulder 14 Head 20 Outer cylinder (exterior body)
30 Sleeve 33 Opening 40 Bottom frame 80 Cap 81 Lower end

Claims (6)

(B) A single-layer container body made of polyethylene terephthalate and having a head portion having a spout connected at the neck, and (b) an exterior made of a resin that is more moisture-proof than polyethylene terephthalate and surrounds the container body from the outside body, comprising a city, the outer body includes a cylindrical sleeve having a collar portion an open top, is composed of a bottom frame that closes the bottom of this sleeve, inside the exterior body, the container body Is stored in a state in which its head protrudes from the opening of the collar part, and the collar part of the exterior body is fixed to the neck of the container body in a sealed state by a band. . (B) A single-layer container body made of polyethylene terephthalate and having a head portion having a spout connected at the neck, and (b) an exterior made of a resin that is more moisture-proof than polyethylene terephthalate and surrounds the container body from the outside body, comprising a city, the outer body includes a cylindrical sleeve having a collar portion an open top, is composed of a bottom frame that closes the bottom of this sleeve, inside the exterior body, the container body Is housed in a state in which its head protrudes from the opening of the collar, and the collar of the exterior body is fixed to the head in a sealed state by a fastening ring, and an uneven portion is formed on the head. And a resin packing is interposed between the concave and convex portion and the fastening ring.   The container according to claim 1, wherein the outer package is a resin layer laminated on an outer surface of the container main body.   The container according to any one of claims 1 to 3, wherein the container body is for aerosol.   The container according to any one of claims 1 to 4, wherein the outer package is made of polyethylene.   The container according to any one of claims 1 to 4, wherein the outer package is made of polyolefin.

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