JPS5852051A - Vessel with hollow partition chamber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a container having hollow compartments in a flexible container side wall, and more particularly, the invention relates to a container having a hollow compartment in a flexible container side wall, and more particularly, a flexible container side wall is provided with a plurality of straight elongated hollow compartments. The present invention relates to a flexible container that is resistant to compressive deformation in the axial or vertical direction, that is, has improved buckling strength, by filling and enclosing a fluid therein.

A rigid container such as a metal or glass bottle [alternatively,
Various lightweight containers made of flexible laminated materials are used in various packaging fields. A typical example of such a flexible packaging container is one in which a laminated material of a heat-sealable resin film and a metal foil and/or a base resin film is formed into a bag or pouch shape, and the surrounding area is heat-sealed. In addition, the above-mentioned laminated material is formed into a cylindrical shape, a side seam is formed by heat sealing, and the upper and lower diamonds are tied or heat sealed. 4, which is weak and still unsatisfactory in terms of independence, mechanical strength, etc.

When forming a container from a flexible laminated material having a heat-sealable coating, the present inventors provided a plurality of elongated hollow chambers perpendicular to the side wall of the container and filled and sealed them with a fluid. It has been found that buckling strength, self-reliance, compression deformation resistance, etc. are significantly improved, and many advantages are achieved as a container.

That is, according to the present invention, in a flexible container made of a laminated material of a plurality of types of flexible coatings, the laminated material constituting the side wall of the container has a vertically bonded portion and a non-bonded portion of the flexible coating. having a large number of continuous or discontinuous hollow chambers formed;
Moreover, there is provided a flexible container with excellent compressive deformation resistance, characterized in that a fluid having a pressure equal to or higher than atmospheric pressure is sealed in the hollow compartment.

The invention will be described in detail below with reference to the accompanying drawings.

In FIGS. 1 and 2 showing an example in which the present invention is applied to a flexible composite cyst, the container body is formed by forming a flexible laminated material 1, which will be described in detail below, into a cylindrical shape and forming a side seam 2. This laminated material 1 consists of an inner flexible coating 6 and an outer flexible coating 4, and the upper end 5, lower end 6 and both side ends 7. 6 and the coating 4 are completely adhered to each other by, for example, heat sealing.

This laminated material 1 is provided with a large number of vertically extending bonded portions 8a, 8h and non-bonded portions 9 at intervals in the lateral or circumferential direction. In the specific example shown in the drawings, the vertical adhesive portion 8a is connected to the upper end adhesive portion 5, but there is a non-adhesive portion 10 with a small interval between it and the lower end adhesive portion 6.
(& exists.

On the other hand, the vertical adhesive part 8b is connected to the lower end adhesive part 6, but there is a non-adhesive part 10 with a small interval between it and the upper end adhesive part 5.
b exists. In this embodiment shown in the drawing, in which these vertical adhesive parts 8a and 8h are present alternately and a hollow compartment 11 is formed in the non-adhesive part 9 of the coating surrounded by these adhesive parts, a large number of The hollow compartments 11 communicate with each other via small non-bonded portions 108 and 106 that serve as passageways.

In the container of the present invention, the above-mentioned hollow compartment No. 11,
Enclose and seal a fluid, especially a gas, with a pressure equal to or higher than atmospheric pressure. Due to the action of this fluid, as clearly shown in FIG. 3, the inner flexible coating 6 of the hollow compartment 11 swells inwardly, and the outer flexible coating 4 bulges outward. This results in a swollen structure, which achieves the effects described below.

That is, a vertical hollow compartment 11 filled with fluid.
is formed around the entire circumference of the container body, so this container has a high compressive strength in the vertical direction and has a structure that is resistant to deformation.It also has excellent self-support even when the material itself is flexible. It can be a container. In addition, the gas filled in the compartment 11 effectively absorbs, disperses, or alleviates impact, etc., increasing the drop strength, impact strength, etc. of the container.Furthermore, since the gas in the compartment acts as a heat insulating layer, , resulting in a container that is less affected by external temperatures. Furthermore, the container easily deflates when the pressure inside the compartment is released, making it easier to dispose of the container. Owing to the above-mentioned characteristics, the container according to the invention is advantageously used as a container for liquids, in particular large containers for liquids with internal pressure, such as fruit juice or beer, carbonated drinks, etc.

The flexible coatings 6 and 4 constituting the laminated material 1t may be made of a single material, or these coatings may be made of a laminate of multiple types of materials. The flexible coatings 6 and 4 can be bonded using any adhesive means known per se, but for the purpose of the present invention, heat sealing using a heat sealing material is particularly preferred. It's advantageous.

From this point of view, it is desirable that at least one of the flexible coatings 3 and 4 is made of a heat-sealable resin that can be heat-welded, or that it is made of a flexible laminated sheet provided with a heat-sealable resin layer.

In FIG. 4 showing an example of a flexible coating in the form of a laminate,
This coating 3 (4) consists of a metal foil 12, a heat-sealable resin layer 14 applied on one side of the metal foil with an adhesive layer 13 interposed therebetween, and an adhesive layer 15 applied on the other side of the metal foil. It consists of an optional synthetic resin film and/or fibrous sheet layer 16 applied as a fibrous sheet.

As the metal foil 12, for example, aluminum foil, steel foil, tin foil, iron foil, etc. having a thickness in the range of -I/X5 to 20 meters is used. Or chemical treatment such as taromic acid treatment, boehmite treatment, electrolytic chromic acid treatment, anodizing treatment (alumite treatment)
A chemical conversion treatment such as the like may also be performed.

As the heat-sealable resin layer 14, a layer of heat-weldable thermosealable resin with a thickness of 10 to 100 micrometers is used, and more preferably low-1 medium- or high-density polyethylene,
Isotaft ivy polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic ester copolymer, ionically crosslinked olefin copolymer (ionomer), or a blend thereof is used. .

The synthetic resin film and/or fibrous sheet layer 16 may be a 10 to 100 micron thick layer made of any synthetic resin, such as a two-wheel stretched polypropylene film, a biaxially stretched polyester film, a biaxially stretched nylon film, etc. , the heat-sealable resin film exemplified above, various papers such as kraft paper, thin paper, coated paper, and other nonwoven sheets of natural or synthetic fibers are used. Of course, these synthetic resin films and fibrous sheets can be used in a laminated manner.

The adhesive layer may be an olefin resin modified with an ethylenically unsaturated carboxylic acid such as maleic anhydride or acrylic acid or its anhydride, that is, a thermoplastic resin adhesive such as an acid-modified olefin resin, or an epoxy resin. Resin-based adhesives, urethane-based (isocyanate-based) adhesives, synthetic rubber-based adhesives, etc. are used.

In the case of a container that requires a high degree of gas barrier property, it is desirable that the metal foil 12 be present in the flexible coating.
However, instead of using a preformed metal foil, a metal such as aluminum can be applied to a synthetic resin film such as a two-wheel stretched polyester film by means of vacuum deposition, sputtering, or the like. It was,
Instead of the metal foil, a high gas barrier resin such as saponified ethylene-vinyl acetate copolymer or vinylidene chloride resin may be used. Furthermore, in this laminate, the use of a barrier layer such as metal foil may be omitted in some cases.

When laminating two flexible coatings, it is desirable to make at least one side of the coatings facing each other a heat-sealable resin layer in order to bond them by heat-sealing. In terms of forming a seam, it is desirable that at least one of the outer surface and inner surface of the laminated material be a heat-sealable resin layer.

The width of the vertically bonded portions 8 and 8h varies depending on the size of the container, but it is generally convenient to set it in the range of 2 to 4wi, while the width of the non-bonded portion forming the hollow compartment 11 is preferably in the range of 5 to 30 times.

As for the structure of the hollow compartment, as shown in the figure, it is advantageous in terms of gas filling and the final container structure to have an alternating communication type. 5 and the lower end adhesive part 6 to form a hollow compartment with an independent lid.

The fluid to be sealed is preferably a gas such as air, nitrogen, or other inert gas, but a liquid such as water may also be used if the loss due to increased weight can be ignored. In some cases, liquefied gas such as liquid nitrogen or 7p gas is also injected. The pressure of the inflowing gas is preferably in the range of 0.1 to 5 #/C1l'' (gauge) at room temperature.

In order to manufacture the container of the present invention, a heat sealer having grooves or recesses corresponding to the hollow compartments is used to heat seal the two flexible coatings, and the adhesive portion and non-adhesive portion described above are sealed. A laminated material 1 consisting of the following is formed. A needle is inserted into the compartment 11 consisting of the non-bonded portion of the laminated material, and the gas at the above-mentioned pressure is filled, and the filling hole is immediately sealed with a pulse seal or the like. This gas-filled laminated material 1 is rolled into a cylindrical shape, and both ends 7.7 are lap-seamed to form a container body.

Alternatively, a hyperbaric chamber (pressure; 5 to 10 to 9/c11
The above-mentioned laminated material is manufactured by heat sealing to within 100 degrees.According to this method, the gas is not sealed by inserting the needle as described above, and when the laminated material tube is taken out under atmospheric pressure, there is no gas inside the compartment. Pressure is created.

This alternative is particularly advantageous in the case of containers with a number of mutually independent hollow compartments.

If the flexible coating used does not have a heat-sealable resin layer, apply the adhesive layer over the flexible coating using an applicator with grooves or depressions corresponding to the hollow compartments. Both flexible coatings are bonded together by an adhesive layer to form a laminated material with compartments, and the container body is formed in a manner similar to that described above.

In the case of the container body made of the flexible laminated material mentioned above,
As shown in Figure 5, the upper end 5 and lower end 6 of the body 17.
A canopy 18 and a bottom lid 19 are respectively covered. The sealing engagement between the body portion 17, the top cover 18, and the bottom cover 19 can be achieved by mechanical fastening such as seaming in hot sealing acid.

These lids may be metal lids made from aluminum (plate or tin) or surface-treated steel sheets such as TFS, like ordinary can lids, or they may be made from the laminated sheet described above. In the specific example shown in FIG. 5, the lid and body are heat-sealed via a heat-sealable resin layer 20.

The container side wall in the present invention can be formed from more than two flexible coatings. For example, as shown in FIG. 6, the flexible laminated material 1a constituting the side wall is composed of an inner flexible coating 3, an outer flexible coating 4, and an intermediate flexible coating 21.

The coating 6 and the intermediate coating 21 are bonded at intervals in the circumferential direction by an adhesive layer 22 to form an inner hollow compartment 11g, while the coating 4, the intermediate coating 21 and the linear adhesive layer 26 are bonded in the circumferential direction. - outer hollow compartments 11 glued at intervals of
It forms h. In the specific example shown in FIG. 6, the inner hollow compartments 11i and the outer hollow compartments 11& are provided in a relationship that overlaps each other only in an alternating manner.
The structure has particularly excellent insulation properties.

The present invention is particularly effective when applied to so-called self-supporting pouches in terms of stable self-supporting properties and increased compressive deformation resistance.

In FIGS. 7 and 8 illustrating an example of this self-supporting pouch, this pouch consists of two opposing sidewall-forming laminated materials 16.
．． 16 and the lower part between these laminated materials 16 and 16,
Bottom forming sheet 2 inserted in a folded form towards the downward person
It consists of 3. The laminated material 1b is made of the same laminated material as shown in FIG. 1, except that the width is shorter and the shape of the lower end adhesive portion 6m is different.

That is, in this laminated material 1b for a self-supporting pouch,
The lower end bonded portion 6 has a shape in which the gap is large at both side edges and the gap is small at the center.

The two laminated materials 1b and 1h are overlapped and bonded by means such as heat sealing at positions other than the upper end adhesive portion 5 and the lower side edges 7.7. The laminated material 1h and one piece of the bottom forming sheet 23Q are connected to the lower end adhesive portion 68 described above.
At this position, the six pieces of the bottom-forming sheet 23 are overlapped and joined by means such as heat sealing, and then only the side edges of the six pieces of the bottom forming sheet 23 are overlapped and joined.

An opening notch 24.24 is formed in the upper side edge of the laminated material to facilitate opening.

In this container of the present invention as well, the fluid filling the hollow chamber extending in the vertical direction Cc acts to prevent the side wall of the container from bending, resulting in excellent self-support and pressure deformation resistance.

Many variations other than those shown in the drawings are possible in the invention. For example, the flexible coating used may be press-molded in advance into a compartment shape, and then bonded together by laginate. Also, instead of providing fluid encapsulation in the form of laminated materials,
The container may be filled and sealed with fluid after it is made into a container.

[Brief explanation of drawings]

Fig. 1 is a front view showing an example of the laminated material used in manufacturing the container of the present invention, Fig. 1g2 is a side view of a container body formed from the laminated material of Fig. 81, and Fig. 3 is a side view of the container body formed from the laminated material of Fig. 2. Fig. 4 is a sectional view showing an example of a flexible coating in the form of a laminate; Fig. 5 shows a state in which the container body and the lid are in sealing engagement. A partial cross-sectional view, FIG. 6 is a cross-sectional view showing another mode of forming a hollow compartment, FIG. 7 is a perspective view showing a container of a self-supporting pouch, and FIG. 1g8 is a line ■-■ of the container in FIG. A cross-sectional view of Ruru. Side light number 1.1g, 14 is laminated material, 2 pieces side seam, 6
4 is the flexible coating on the inner surface, %5 is the flexible coating on the outer surface, %5 is the upper end adhesive part, 6.6g is the lower end adhesive part, 7 is the side edge adhesive part, 8G
, 8& is the vertically bonded part, 9 is the non-bonded part, 11.1
16.11h is a hollow compartment, 12-wire metal foil, 14#'i,
A heat-sealable resin layer, 16 an expanded synthetic resin film and/or fiber sheet, 17 a container body, and 18 and 19 a lid, respectively. Patent applicant: Toyo Seikan Co., Ltd. Figure 1 Figure 2 Figure 3 W! 5rli Figure 4, 8

Claims (1)

[Claims] Medium: In a flexible container made of a laminated material of multiple types of flexible coatings, the laminated material constituting the side wall of the container is formed by a vertically bonded portion and a non-bonded portion of the flexible coating. It has a large number of continuous or discontinuous hollow chambers, and the hollow chambers are sealed with a fluid having a pressure equal to or higher than atmospheric pressure. Excellent flexible container. (2) The container according to claim 1, wherein the flexible coating is provided with a heat-sealable resin layer that can be heat-welded. 3. The container of claim 1, wherein the flexible container comprises a body having a side seam formed of a laminated material and a lid in sealing engagement with the body. (4) The container according to claim 1, wherein the flexible container is a self-supporting pouch formed by forming a laminated material into a bag shape and overlapping and bonding the periphery thereof. (8) the laminated material is formed from two flexible films;
2. A container according to claim 1, wherein a hollow compartment is formed in the non-adhered portion. 6) The container according to claim 1, wherein the laminated material is formed from three flexible coatings, and inner hollow compartments and outer hollow compartments are alternately formed. . A container according to claim 1, wherein the fluid is a gas and is enclosed in the hollow compartment at a pressure of 0.5 to 5 kg/cm'' gauge.