JPH06100057A - Laminated container and its manufacturing method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a laminated container excellent in preservability of contents without deforming its shape due to use and without remaining air inside, and a manufacturing method thereof. [Structure] Made of flexible synthetic resin, from the mouth cylinder 1 to the shoulder 2
The inner container 5 formed of a film body is placed inside the bottomed outer container 4 that reaches through to the side surface portion 3, and a shoulder is formed from a substantially intermediate point of the side surface portion 3 between the outer container 4 and the inner container 5. A heat-melting type adhesive 6 was formed on the portion applied to the portion 2, and a check valve 8 for inflowing air was provided on the bottom portion 7 of the outer container 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated container and a method for producing the container.

[0002]

2. Description of the Related Art Conventionally, as a container for cosmetics, a flexible container represented by a tube container and a highly rigid container represented by a glass bottle have been known.

[0003]

However, each of the above-mentioned conventional devices has its own peculiar problem. That is,
The former tube container has a problem that it lacks a high-grade feeling because the deformation progresses with use.

On the other hand, in the latter high-rigidity container, it is difficult to take out the contents because the container has to be inverted during pouring, and since the container is filled with air, some contents may be oxidized. There is fear.

The present invention has been made in view of the above matters, and has a shape that is not deformed by use, and air does not remain inside, so that a laminated container excellent in storage stability of contents, and It is a technical subject to provide the manufacturing method.

[0006]

In order to solve the above technical problems, the present invention has the following constitution. That is, the inner container formed of the film body is provided inside the bottomed outer container that is formed of the flexible synthetic resin and extends from the mouth cylinder portion to the side surface portion through the shoulder portion. A heat-melting type adhesive was formed at a portion extending from the approximately midpoint of the side surface portion to the shoulder portion between, and a check valve for air inflow was provided at the bottom portion of the outer container.

In order to solve the above technical problems,
The following method was adopted. That is, a bottomed outer container that is made of a flexible synthetic resin and extends from the mouth cylinder portion to the side surface portion through the shoulder portion is prepared, while an inner container formed of a film body in substantially the same shape as the outer container is prepared. Then, after forming an adhesive layer made of a heat-melting type adhesive at a portion extending from the approximately midpoint of the side surface portion on the outer surface of the inner container to the shoulder portion, the inner container is mounted in the outer container, and from the mouth tube portion. The adhesive is melted by sending heated air under pressure to partially bond the outer container and the inner container.

As another method of the same means as described above, instead of the outer surface of the inner container, an adhesive layer made of a heat-welding adhesive can be formed on the inner surface of the outer container.

[0009]

The inner container and the outer container are joined by an adhesive at a portion extending from the substantially middle point of the side surface portion to the shoulder portion.

Here, when pouring out the contents filled in the inner container, the outer container made of flexible synthetic resin is squeezed. Then, the air in the outer container is compressed, and accordingly, the inner container is compressed and the contents are poured out. When the outer container is released, the shape of the outer container returns to its original shape, so that the pressure inside the outer container is reduced. Then, the air flows in from the check valve provided at the bottom of the container, and the air returns to the pourable state again.

As described above, since the contents are always in close contact with the inner container and the contact area with the outside air is extremely small, it is possible to store even an easily oxidizable substance for a long period of time. Moreover, the contents can be poured out simply by squeezing the outer container regardless of the orientation of the container, which is convenient.

Further, even when the contents are reduced due to use, the outer container is not deformed, so that a high-class feeling can be maintained.

[0013]

Embodiments of the present invention will be described with reference to FIGS. The outer container 4 is formed of a flexible and elastic plastic material such as polyethylene or polypropylene, and has flexibility. This outer container 4
Has a bottomed shape from the mouth tube portion 1 around which a thread is provided to the side surface portion 3 via the shoulder portion 2, and the bottom portion 7 is provided with a perforated portion. A check valve 8 that allows outside air to flow into the outer container 4 is provided in the perforated portion.

The outer container 4 has, for example, a thickness of 0.0
An inner container 5 formed of a flexible and hard-to-rip plastic such as polyethylene having a thickness of about 5 to 0.2 mm or a laminated film having heat resistance is to be incorporated. The inner container 5 is formed into a shape substantially similar to that of the outer container 4 by integrally connecting the rigid mouth tube portion 5a by means such as heat welding. A collar portion is formed on the upper edge of the mouth tube portion 5 a so as to cover the upper edge of the mouth tube portion 1.

Before inserting the inner container 5 into the outer container 4,
A heat melting type, so-called hot melt type adhesive 6 is applied to the outer periphery of the inner container 5 (FIG. 2). As shown in FIG. 3, the position where the adhesive 6 is applied to the inner container 5 is a portion extending from a substantially middle point of the outer side surface portion 13 of the inner container 5 to the shoulder portion 12, and the transfer is performed while rotating the inner container 5. Formed by spraying or spraying, the adhesive is a material of the inner container 5,
It is selected according to the material. For example, if the inner container 5 is a polyethylene film, Toko Petrolite's Topco H
-425, or equivalent, is suitable.

When the inner container 5 is inserted into the outer container 4, the content 5 is rolled or folded into a slender shape. The adhesive is cooled and solidified before being inserted into the outer container 4. There is.

Then, after inserting the inner container 5 into the outer container 4, air at room temperature is introduced to immediately expand the inner container 5 and, as shown in FIG.
Is inserted into the container from the mouth tube portion 5a. The hot air nozzle 10 has a blowout port 10a formed on its side surface, and blows heated air from a warm air blower onto the inner surface of the adhesive 6. The inflow of the heated air melts the adhesive 6 to partially bond the outer container 4 and the inner container 5.

In this case, in order to expand the inner container 5 and dissolve the adhesive, heated air of about 80 to 150 degrees is blown into the inner container 5 for about 2 to 10 seconds, or It is suitable to circulate in the inner container 5.

Thereafter, the inner container 5 and the adhesive 6 are cooled, the hot air nozzle 10 is pulled out from the mouth cylinder portion 5a, and the contents 9 are filled into the inner container 5 from the mouth cylinder portion 5a by a general filling method. To do.

A check valve (not shown) is attached to the mouth tube portion 1 so that air does not flow into the inner container 5 from the outside. Hereinafter, an operation example will be described.

As described above, the inner container 5 and the outer container 4 are joined to each other by the adhesive 6 at the portion extending from the substantially middle point of the side surface portion 3 to the shoulder portion 2. Therefore, although the inner container 5 and the outer container 4 are integral with each other on the bonding surface, they are not bonded from the substantially middle point of the side surface portion 3 to the bottom direction, and the direction of contracting into the container is free. .

When pouring out the contents 9 filled in the inner container 5, the side surface portion 3 of the outer container 4 is squeezed as shown by an arrow G. Then, as shown in FIG.
The air inside is compressed, the inner container 5 is compressed accordingly, and the contents 9 are poured out.

When the outer container 4 is released, the shape of the outer container 4 returns to its original shape, so that the pressure inside the outer container 4 is reduced. Then, the air flows in from the check valve 8 provided in the bottom portion 7 of the container, and the air returns to the pourable state.

As described above, when the outer container 4 is squeezed, the outside air sequentially flows between the inner container 5 and the outer container 4, and the inner container 5
While being reversed, the contents 9 are pushed out to the end. It should be noted that the portion to be bonded by the adhesive 6 may be such that it does not hinder the inner container 5 from being inverted, and from the shoulder portion 2 to the side surface portion 3,
It may be slightly increased.

[0025]

As described above, according to the present invention, since the contents are always in close contact with the outer container, the contact area with the outside air is extremely small, and it is possible to store even a substance that is easily oxidized for a long period of time. Become.

Further, the contents can be poured out simply by squeezing the outer container regardless of the orientation of the container, which is convenient.
Further, even when the contents are reduced due to use, the outer container is not deformed, so that a high-class feeling can be maintained.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 3 is a plan view of a manufacturing process showing an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a usage state showing an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a usage state showing an embodiment of the present invention.

[Explanation of symbols]

 1 Mouth tube part 2 Shoulder part 3 Side part 4 Outer container 5 Inner container 6 Adhesive 7 Bottom part 8 Check valve 9 Contents

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Stefan, W, Harding Cincinnati, Ohio, United States, Wan, Proctor, End, Gamble, Praza (no address) The, Proctor, End, Gamble, Company

Claims (3)

[Claims] 1. An inner container formed of a flexible synthetic resin, which is made of a flexible synthetic resin and is provided inside a bottomed outer container extending from a mouth tube portion through a shoulder portion to a side surface portion, A heat-melting type adhesive is formed at a portion applied to the shoulder from the approximately middle point of the side surface between the outer container and the inner container,
A laminated container characterized in that a check valve for air inflow is provided at the bottom of the outer container. 2. An outer container having a bottom, which is made of a flexible synthetic resin and extends from a mouth tube portion through a shoulder portion to a side surface portion, is prepared, while a flexible and tear-resistant film material has substantially the same shape as the outer container. Prepare the inner container formed on the inner container, and after forming an adhesive layer made of a heat-melting type adhesive on the outer surface of the inner container from the approximate midpoint of the side surface to the shoulder, mount the inner container inside the outer container. Then, heated air is pressure-fed from the mouth tube portion to the inner container to dissolve the adhesive to partially bond the outer container and the inner container to each other. 3. A bottomed outer container made of a flexible synthetic resin and extending from a mouth tube portion to a shoulder portion to a side surface portion is prepared, while a flexible and tear-resistant film material having substantially the same shape as the outer container. Prepare the inner container formed on the inner container, and form an adhesive layer made of a heat-melting adhesive on the inner surface of the outer container from the approximate midpoint of the side surface to the shoulder, and then mount the inner container in the outer container. Then, heated air is pressure-fed from the mouth tube portion to the inner container to dissolve the adhesive to partially bond the outer container and the inner container to each other.