JP3563158B2 - Delamination container - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to initial delamination of a delamination container.
[0002]
[Prior art]
In the initial delamination of the laminated peeling container in which the outer layer and the inner layer can be peeled, air is forcibly fed between the inner layer and the outer layer from the air introduction hole formed in the outer layer of the container mouth to form both layers. The initial delamination method in which air is blown from the mouth of the container and the air previously sent from the air introduction hole is discharged, and the container treated by the initial delamination method are conventionally known. Has been. (See, for example, JP-A-6-345069)
[0003]
However, in the above-mentioned conventional technology, the entire lamination surface is peeled off, so that a certain amount of delaminated air must be sent in accordance with the size of the container, and if the adjustment is not performed properly, the whole lamination surface is peeled off. Was not performed sufficiently.
In order to overcome this deficiency, a method of forming an initial delamination by simply introducing a small amount of air from the air introduction hole by improving the resin material of the inner layer and peeling off a part of the outer layer and the inner layer is disclosed. Laminated release containers treated by the method have been proposed.
[0004]
[Problems to be solved by the invention]
However, also in the above-mentioned technique, after the initial delamination is formed, air is injected from the container opening, the delamination air introduced between the outer layer and the inner layer is discharged, and the inner layer is returned to the original state. This is the same as the prior art, and requires an air press-in step after initial delamination formation and an apparatus therefor.
When the inner layer is returned to the original state, the peeled inner layer is pressed against the outer layer by the press-fit air, so that the peelability of the inner and outer layers is weakened, and how much initial delamination is formed. It is difficult to carry out the inspection because it is unknown whether it is performed or not.
[0005]
Generally, in a container for containing a liquid, the filling ratio of the content liquid to the container is almost constant, so that as the volume of the container increases, the head space relatively increases, and the liquid level is below the shoulder portion of the container, the body. In some cases, it could go down to near the top of the part.
When installing the pump dispenser, take into account the volume removed by the pump and the trouble when inserting the pump, so as to take a lot of head space,
As a result, the liquid level sometimes dropped.
[0006]
If the head space becomes large and the liquid level drops below the container mouth to below the container shoulder and near the upper end of the body, the liquid level will shake during transport of the container and the content liquid will vibrate violently. In some cases, it caused foaming and gas generation.
In addition, if the liquid level drops to near the body of the container, even if the indicated amount of the liquid content is filled, the transparent and translucent containers will not be visible if the container is shaken in the case of opaque containers. There has been a problem that the solution fluctuates and gives the consumer the impression that the filling amount is insufficient and less than the display.
[0007]
The present invention has a technical problem to solve the above problems, and provides a laminated peeling container in which a predetermined amount of initial delamination air is held in a peeling portion and an inner layer is bulged inward of a container mouth. With the goal.
[0008]
[Means to solve the problem]
In order to achieve the above object, the present invention provides a laminated peeling container in which an outer layer and an inner layer can be peeled off from each other by blowing air from an air introduction hole formed in an outer layer of a container mouth, and surrounding the introduction hole and a container shoulder. The container is characterized in that a part of the inner layer of the upper part of the body and the trunk is partially peeled off from the outer layer and swelled inward of the container mouth.
[0009]
[Action]
In the initial delamination, the upper part of the container is only partially peeled off, and is not returned to the original state, so that the step of injecting air into the container becomes unnecessary, and the manufacturing process becomes easier.
Since the swollen portion can be observed from above the container opening, the state of delamination formation can be easily inspected.
At the time of pouring out the content liquid, the peeling proceeds due to the introduction of air from the beginning of the pouring, so that the peelability can be improved as a whole.
[0010]
When the container is filled with a certain amount of the liquid content, the head space is reduced by an amount corresponding to the swelling of the inner layer, so that the liquid level can be raised to a desired height by adjusting the amount of delaminated air.
Then, when the liquid level is raised to the container mouth, the fluctuation of the liquid level during transportation can be reduced.
Even if gas is generated from the contents, only the inner layer moves due to the gas pressure, and the external shape of the container does not change at all.
[0011]
【Example】
Next, the laminated peeling container according to the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes an outer layer for maintaining the external shape of the container, and it is preferable to use a high-density polyethylene resin.
Reference numeral 2 denotes an inner layer that forms an inner bag that is detachable and deformable from the outer layer, and is made of a flexible resin such as nylon or EVOH.
The material of the inner and outer layers of the container may be any resin material having the above function, and is not limited to the resin of the embodiment.
[0012]
Reference numeral 3 denotes a container body, 4 denotes a container shoulder, and 5 denotes a container mouth. The container is formed by lamination extrusion blow molding.
Reference numeral 6 denotes an air introduction hole drilled in the outer layer 1 of the container opening 5, which introduces air between the outer layer 1 and the inner layer 2 so that the inner layer can be peeled off while maintaining the appearance of the blow container. And has the effect of completely discharging the content liquid.
[0013]
Reference numeral 7 denotes an engagement piece for preventing the inner layer from dropping. The engaging piece is formed by a mandrel of a blowing device at the time of blow molding, and is used when a part of the outer layer 1 and the inner layer 2 are bonded with an adhesive band or the like. May not be required.
Numeral 8 is a gap formed between the outer layer and the inner layer which have been separated by blowing delaminated air during initial delamination.
Reference numeral 9 denotes a bulged portion of the inner layer 2a which has been peeled off by blowing deramid air.
[0014]
Here, the formation of the initial delamination will be described. In FIG. 4, reference numeral 10 denotes a delamination air blowing member, in which a through hole 11 is pierced inside and a nozzle 12 is formed at the tip.
An opening 11a and an opening 11b communicating with the side of the nozzle are provided on the end surface of the nozzle 12, and air is blown downward from the opening 11b.
[0015]
In forming the initial delamination, the nozzle 12 of the delamination air blowing member is inserted into the air introduction hole 6 at the container mouth, and when a certain amount of delamination air is blown, the inner layer around the mouth is first peeled off, and then the container shoulder portion 4. The exfoliation of the upper part of the trunk 3 progresses, and the inner layer 2a in the portion surrounded by the line 2a shown in FIGS.
In the initial delamination formation, the inside layer 2a is blown with an amount of air enough to swell at least to the inside of the container opening to form the swelling portion 9.
[0016]
Conventionally, after the inner layer 2a is separated from the outer layer 1, air is press-fitted from the container opening to discharge delaminated air, and the separated inner layer 2a is returned to the original state as shown in 2c of FIG. However, in the present invention, the bulging portion 9 formed by the peeled inner layer 2a is maintained as it is.
[0017]
After the initial delamination is formed, in the inspection step, the bulging portion 9 is observed from above the container opening with a television camera or the like, the state of formation of the initial delamination is inspected, and the container is carried out as a molded container.
[0018]
Next, the filling of the content liquid will be described.
The head space is determined by the capacity of the container and the filling amount of the inner solution, but when a predetermined amount of the inner solution is filled into a container having a swelling portion such as the laminate peeling container of the present invention, the size of the swelling portion is increased. Accordingly, the head space decreases, and the liquid level La rises by the capacity removed by the bulging portion 9 as compared with the liquid level Lb when the bulging portion 9 is not formed.
[0019]
Since the fluid pressure in the bulging portion 9 is extremely small and the flexible inner layer has a certain degree of shape retention, the discharge of delaminated air is extremely small, and the shape of the bulging portion is small. Is almost maintained.
When the container opening is covered with the cap, the air does not enter the container, so that the delaminated air is not discharged and the liquid level is constant.
[0020]
According to the present invention, the head space can be reduced and the height at which the liquid surface rises can be adjusted depending on the size of the bulging portion 9, that is, the capacity of the void portion 8. Even with the filling amount, the liquid level can easily be raised to the container mouth.
[0021]
Even if the volume of the container is large, the head space is large, and the liquid level is lower than the container mouth, and lowers near the upper end of the trunk below the container shoulder, the liquid level is extended to the container mouth by the bulging portion. The liquid level can be raised when the container is transported, and the content liquid can be prevented from being rocked.
[0022]
【The invention's effect】
The present invention has the following effects because it is configured as described above.
In the initial delamination, the step of injecting air into the container becomes unnecessary, and the manufacturing process is simplified.
Since there was no pressure contact between the two layers due to the press-fitting of air into the container, the peelability could be improved.
Since it can be observed from above the container mouth, the state of delamination formation can be easily inspected.
[0023]
When the container was filled with the content liquid, the head space could be reduced and the liquid level could be raised to a desired height by adjusting the amount of delaminated air.
Then, when the liquid level is raised to the container mouth, the fluctuation of the liquid level at the time of transportation, the fluctuation of the content liquid, and the like can be reduced, and the sense of fulfillment can be given when the consumer holds the container.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a laminate peeling container of the present invention.
FIG. 2 is a plan view of a laminate peeling container.
FIG. 3 is a side view of the laminate peeling container.
4A and 4B are explanatory diagrams of initial delamination formation, wherein FIG. 4A is a partial cross-sectional front view of a lamination release container, and FIG. 4B is a diagram illustrating a blowing member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer layer 2 Inner layer 3 Container trunk 4 Container shoulder 5 Container mouth 6 Air introduction hole 8 Void 9 Swelling part

Claims (1)

In a laminated peeling container in which the outer layer and the inner layer are peelable, air is blown from the air introduction hole formed in the outer layer of the container mouth, and the inner layer around the introduction hole, the container shoulder, and a certain portion of the upper part of the trunk is blown. A laminated peeling container characterized in that a peeled inner layer is peeled from an outer layer, and the peeled inner layer is swollen inward of a container mouth to form a swollen portion.

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