JPS6090131A - Can-shaped vessel - 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 that can be used as a canning container in place of conventional metal cans.

Metal cans (tin cans) have traditionally been on the market in large quantities as canning containers, but recently they have been on the decline.This is due to the coldness and lack of fashion characteristic of the metal that makes up cans. It is said that this is due to problems such as deterioration of the taste of food and problems with odor.

Therefore, containers made of other materials and having the above-mentioned drawbacks are being considered, and A/containers made of multilayer film with a plastic layer on the foil surface are one part of this, and are made of a flat plate. It is practiced to form a three-dimensional container (container body) that can store contents such as food by molding a film (sheet).

One of the conventional methods for forming a container body, which is a three-dimensional object, from this flat multilayer film is the so-called drawing process. In this method, the peripheral edge of the multilayer film is stretched (stretched) downward by applying pressure from a support (cranked together and applying an upward force to the film).

This is a method of forming a container body having a depth that can accommodate the contents, and is carried out by one-pass cold rolling.

However, since this method involves stretching a multilayer film, the thickness of the Al foil becomes uneven.

Also, pinholes and cranking are likely to occur (thus, thin A
/ It is difficult to use foil and 1 usually 60-100μ
There is a drawback that a fairly thick A/ foil must be used. This makes the product cost of can containers high. In addition, since the method involves stretching At-tubes, it is difficult to make containers with deep bottoms (there is also the drawback that only shallow bottoms can be made).

On the other hand, as a method of making a three-dimensional container main body from a flat multilayer film, it is also possible to cut out (cut) appropriate portions of the film and fold flaps provided on the film inside. However, in the JEJ stand using this method, the cut surface of the film comes into contact with the contents such as food, which is unfavorable from a food hygiene perspective, or rather has a μ point.

The object of the present invention is to create a thin A7' which has never been attempted before.
It would be desirable to provide a container which can be used in place of conventional metal cans, especially as a canning container, having a container body constructed of a multi-layered plastic substrate having a metal foil such as foil.

Another object of the present invention is to provide a container body constructed without stretching (stretching) the base material as described above. Although A/ foil cannot be used, it is possible to use thin A71' foil, and the thickness of A/ foil can be minimized, and when AJ foil is stretched, A/ foil thickness is insufficient. However, the object is to solve this problem and provide a container that has a uniform thickness, has a deep bottom, is inexpensive to manufacture, and has a container that is durable.

Another object of the present invention is thin AI! Our goal is to provide a container that can be completely combusted and solve the problem of pollution caused by one can as a result of the use of foil.

Another object of the present invention is to provide a container for fashionable foods that eliminates the disadvantages of metal cans, such as deterioration in taste. A further object of the present invention is to form a sealed container by attaching a lid made of the same multilayer base material to each container body as described above by heat-melting the respective resins, which is capable of retort processing, and has gas barrier properties. Our goal is to provide containers that are durable and can withstand long-term storage.

A further object of the present invention is to attach a tray of a thick-walled container or the like to the outer surface of the container body, so that it can be made into a can while taking advantage of these characteristics. It has more practical functions as a container, prevents the container from deforming and collapsing during transport and during one operation (stacking containers, etc.), and further improves the shelf life of the container (gas barrier properties, sealing performance). It is an object of the present invention to provide an improved container, and other objects and novel features of the present invention will become apparent from the following description of the specification and drawings.・Next, based on a drawing showing the implementation example,
A-I do.

FIG. 1 shows a perspective view of a container (with a square m container body) that constitutes the container of "Hon-Shuu". In Fig. 1, reference numeral 1 is a storage item for storing contents (light-'1c1), and the storage part 1 is a bottom plate (wall) 2 and a hole plate provided on the four sides of the acupuncture bottom plate.
It consists of 5. In Matabe 1 VJ, 4 is M-to, non-n
The ryll 4 extends from the upper end of the m-shaped side cleat 6 in a direction substantially perpendicular to the side plate and is connected thereto.

Further, FIG. 2 shows a developed view of the container 4 shown in FIG. 1. The symbols in FIG. 2 correspond to the first numbers. That is, 1
The closing part is the part that forms the storage decoration 1 of the container body, and consists of the mouth 2 which forms the lower plate 2 of the container body 4a and the part 6' which forms the side plate 6 of the container. 4' is the part that makes up JFJ 4 of the main salary of the container. These 1' to 4' will also be stored in the same way below.
The bottom plate, side plate, and no.11 are called.

In the container body according to the present invention, the side plate 3' is bent inward by the prayer plate 5, and is connected to the periphery of the bottom 7M and 2'. A shoulder portion 4/ provided therein and connected to the side plate 3' is bent outward along a fold line 6 in a direction substantially perpendicular to the side plate 3'.

By the way, from a multilayer base material as shown in the developed view in Figure 2,
To mold the container body as shown in the perspective view in Figure 81,
In other words, from a flat (2-dimensional) multilayer base material to a weight (6-dimensional)
In order to make a container body, distortion is inevitable (multilayer or material conflict).
coming out.

11A, IIB, 12A, 12B in FIG.

13A, 15B, 14A, and 14B are the remainder of the multi-layer base material.

In the present invention, the metal of the multilayer base material is folded in at a portion of each corner (four corners 7, 8, 9, and 10 in FIG. 2). This will be explained using the remainder 11A of the multilayer base material as an example. That is, in FIG. 2, the remainder 11A of the multilayer base material is folded into the multilayer base material 16141I along the crease i15, and at the same time, the multilayer base material 1
7 is folded along the crease line 18 into the multilayer base material 16i11jK. By folding the multilayer base material 11A in this way, the next surface of the fold (folded part) 11A of the multilayer base material is joined to the cloth surface of the multilayer base material 16, and the remaining part of the multilayer base material (folded part) 11A is joined to the outer surface of the multilayer base material 16. The back surface is joined to the same surface of the multilayer base material 17, and a three-prong structure of the folded part 11A and the multilayer base materials 16 and 17 is formed. In the above example, the folding portion 11A is used to perform water-hydration, but the folding portions 11B and below are also folded in the same manner to form a three-jaw 4pI structure.

In this case, the corner part 7 is 11A.

The folded part of IIA is formed, and the following corner part is 8°9.1
0, D-chokomi capitals of 2 m j3i are formed respectively. However, each container body of the present invention is 111u.
The plate 6' is bent along the crease line 5, the M-piece 4' is folded along the crease line 6, and the plate 6' is simultaneously formed along the crease line 15 and 18 without being bent. FIG. 3 is a perspective view of the male mold used for this simultaneous molding.
Grooves 21 are carved to match the size and the like. A multilayer base material punched out from a single continuous multilayer base material to a size sufficient to construct a container body is placed on this male mold.

Then, when the female mold 22 shown in FIG. 4 is placed again on this multi-layer base material and the female mold 22 is pressed, the multi-layer base material slides inside the flange 21 of the female mold 19 and easily Not shown in FIG. 1 is the container body. At this time, the essential point is that the male mold 19 and the female mold 22 are designed to be safe.

After careful consideration, the non-inventors found 21 male molds and 1 female mold.
There is almost no clearance between the straight parts 23 and 24 of the male mold 19, that is, the wall surface of the straight part 23 of the 41 part 21 of the male mold 19 is in contact with the side wall surface of the straight part 24 of the male mold 22. However, it has been found that it is good to provide a clearance between each corner portion 24, 25, 26.27 of the peak portion 21 of the male mold 190 and the valley corner capital 28, 29, 30.31 of the female mold 22. Ta. FIG. 5 illustrates this relationship, and in the figure, 52, 66, 54, and 55 respectively indicate the clearance of a part of the valley corner between the male mold and the female mold.

In this way, by placing the multilayer base material on top of the male kettle and then placing the female mold on top of the multilayer base, the multilayer base material forms an r1° child part circle of the male mold. The multi-layer base (J) can be easily bent to form a storage area for the container body, and a clearance is provided at a portion of each corner. At this point, the remainder of the multilayer base material is collected and folded to easily form a container body as shown in FIG.

During the above molding, each corner of the multilayer base material punched from a series of slow multi-Al base materials is cut into a sawtooth shape, for example, as shown in FIG. When folding the remaining material 11A, 11B, the shoulder edge lines 37A, 58A.

It is best to align 39A; 37B, 38B, and 39B in a line. The same applies to the folding of a portion of each other corner.

On the other hand, in the case of the 8-container main body of the present invention, the remainder of the multi-B'j base material may be wrinkled in the 1E direction at the corners of the container main body. Such a container body can be molded using gold shown in FIGS. 3 and 4 in the same manner as in the case of the triple structure shown in FIG.

FIG. 6 shows a container main body formed by collecting the remainder of the multilayer base material as vertical wrinkles, and the paper board diagram shows an embodiment in which a shield is placed at the bottom of the shoulder 4, but the shoulder 4 They may also be combined to form 7 consecutive directions.

In addition, when forming the container body, pre-fold the F4 base material using a method such as hot stamping.
6, 15, and 18 (abbreviated as shown in FIG. 1, but includes other fold centers), it is also possible to make the container body easier by inserting linear incisions.

Further, in the above embodiment, a rectangular can container is shown as an example, but containers other than rectangular cans may be evenly spaced or hexagonal in shape.

The container body according to the present invention is a multilayer base without being stretched.

Since the remainder of the material is formed as a folded rim or shield, the bottom plate 2, side walls 3, and shoulder portions 4 all have the same thickness. In addition, since the multi-layered material is not stretched and the remainder is folded or formed into a shield, the container body can be made of thin gold foil without causing any stretching cracks in the metal foil. Good results can also be brought about in the storage stability of the container. At the same time, even if a thin gold/stainless steel foil is used, stretch cracks are unlikely to occur, so the thickness of the metal foil can be kept to a minimum.

Furthermore, since it is made of 4N by thin-walled gold HA cutting,
It has the ability to burn capital and can solve the problem of can pollution. Furthermore, when a thin metal foil is used to form a container body with a deep storage part, stretch cracks occur and this can be achieved.However, in the present invention, the remainder of the multilayer base I is Since the material is folded or wrinkled, it is possible to form a container main body having a deep-bottomed storage portion without causing expansion cracks. Furthermore, since the container body is not constructed by cutting the multilayer base material at the part where the claws fit together, the cut surface of the base material will not come into contact with the contents such as food.
It can also be made favorable from the viewpoint of food hygiene.

Next, to explain the material constituting the container main body according to the present invention, the middle layer is a metal paulownia layer, and a hot bath 7. I: A multi-layer base material having two or more layers is used. Various types of base materials can be used as the base material, but for the purpose of the present invention, especially Aj
'Haku is given as an example of substitute clothing. Kasa M4Via]4
The thickness is 40 μm, and since the present invention does not involve a stretching process as described above, the thickness of the multilayer base material, especially the metal foil, is uniform from beginning to end, and it is also possible to use thin-walled materials, and the thickness is 7 μm. The container body can also be made of the following.

Various kinds of resins can be used for the resin layer constituting the resin layer, and examples of synthetic resins include polyolefin resins such as ethylene-propylene copolymer. In addition, the tree JJ
Preferred examples of the resin forming layer A and the thickness of the additional layer will be described in detail in connection with the tray and lid described later.

Next, the tray and body of the container of the present invention will be explained.

Figure 7 (A j1 (port J and e'-3 are front perspective views of the container of the present invention ÷. is a tray.

In the present investigation container, a tray C is attached to the outer surface of the container body B, and a lid A is attached to the upper part of the container body B. The chamber body A is composed of a multilayer base material of at least two layers, the intermediate layer being a thin metal layer and at least one surface coated with heat-meltable resin. The resin constituting the gold JP'4 foil and the resin layer is 1311, the multilayer base material constituting the Bk2 container body, and l
l1li1-like ones are used. The lid is attached to the container body with its resin layer (inside). ? In other words, it is appropriate that the resin layer on the side of the container main body of the chamber is made of a resin that can be melted in a bath and thermally bonded to the container main body.

FIG. 8 shows the container body 41 shown in FIG.
2 (The cross-sectional opening of the unexploded ψj container portion made by capping AJ is taken by cutting 9J in the longitudinal direction.

The lid 42 (AJ means that the peripheral end 43 of the lid is connected to the container body 41
It is sealed with the waste portion 4 by heat sealing or the like to form an airtight container. As shown in FIG. i! ! This is done by melting the resin layer (inner layer) 44 and the inner layer 45 of the lid 42 in a pjA bath. Therefore, when thermally bonding (heat sealing) the resin layers of the container body, lid, and plastic layer, it is appropriate that the inner layer 44 of the container body is also made of a resin that can be bath melted by heat and can be thermally bonded. From this relationship, the thickness of the inner layer [44] of the container body is 40 μ or more, preferably 50 to 10
0 μ is appropriate.

In the embodiment shown in FIG.
Thermal bonding (heat sealing) by bath melting using the heat described above in l)
A sandwich t comprising a thermoplastic resin layer 45 and a heat bath meltable resin layer (outer surface) on the other surface (outer surface).
Although an example of a lid made of a four-layer multilayer base material is shown, the outer layer 47 can also be omitted. For the same purpose, in the embodiment not shown in FIG. 648 has Jfj44 in the resin with +Jjf written on one side and is hot bath melted "J i-1,:
7yo1j fat layer (outer layer) 49'f! Although an example of a container body made of a polygonal base material having the above-described structure is shown, the outer layer 49 can also be omitted.

As for the tray, you can use one made of various frame materials, for example,
Constructed of plastic, paper, and polystyrene. Also, regarding this tray, when transporting baths and vessels, 4 tons
It is often made of a material that is thick enough to support the container body from below during lifting operations, or to prevent the container from forming a rhombic shape. It is preferable to inject J9 to make a plastic tray. Furthermore, the tray used has an inner surface that matches the outer shape of the container body.

As shown in FIG. 9, the container main body B is fitted into the tray C, and the inner surface of the tray C is attached to the outer surface of the container main body.

The tray C and the container body B may be bonded together using an adhesive, or a heat seal layer may be provided on the inner surface of the tray C (within the container body C). However, it is not necessary to glue the tray C and the container body B in the case of "mainly releasing" (the container body B is attached to the tray C).
The tray C and the container body B may be simply attached to each other, or a wall may be provided between the tray C and the container body B.

Next, we will show a few examples of the manufacturing method of the container of the present invention. 25 container bodies are supplied to the tray shown in FIG. 1, and the container bodies are attached to the tray using a heat press.

Next, heat seal the paste onto the main body of the five-body container. Before attaching the lid, fill the container with food, etc., remove the lid, close the inside of the container, and perform retort processing.

For the above container body, the remainder of the multilayer base material is folded in,
It is also possible to use the container body, which is composed of a three-dimensional structure and a multilayer base material, or a container body formed by collecting a plurality of layers as a loose magnet. It is also used for the 4-hour inspection of the container body.
Yojuzuki) ■ 13fl for Z O U 'Ff for N's three blades
The folded part and each multi-node D4 material that make up the l structure and '31' *
The resin layer on the coating surface is fluidized and stretched to the extent that the resin layer is stretched by 7L to create a smooth coating surface.Thus, it constitutes the multilayer base material of the container body; as a 1LiJ fat layer. It is recommended to use a resin layer that is heat-sealable, taking into account the heat-setting conditions.

(2) In the above manufacturing method of fil, a flat plate-shaped multi-layered material is fed into a tray, and a container body as shown in FIGS. You can also make a canned food container like ``10''.

(3) Also, the appearance J as shown in Figure 1 and 'jA' 3.6
J'a may be injected into the main body of the container by holding the main side in the injection metal area, thereby making it possible to create a container with a plastic tray.

The container of the present invention formed in this way can be retorted, has excellent gas barrier properties, can withstand long-term storage, is fashionable, does not deteriorate the taste of food, and is particularly useful as a canning container. It opens up a new field in place of the conventional gold-effect cans.

Since the container according to the present invention is equipped with a tray, deformation can be suppressed even if the container body is made of a multilayer base material with a thin metal foil as an intermediate layer. You can take full advantage of its unique characteristics.

Although the invention made by the present inventor has been specifically described above based on examples, it is to be noted that the present invention is not limited to the above-mentioned examples, and can be modified to a 111% degree without departing from the gist thereof. Not even. For example, in the case of the *flow side described above, an example in which the container body has a shoulder portion has been described, but this shoulder portion may be omitted, and the lid body and the tray may be heat-sealed to form a container for everyone. Also, this) shoulder”x
In the case of If, the upper end of the side plate is shown as an example in which it protrudes almost perpendicularly to the side plate, but it may also extend in the same direction as μ (1) &. An example of a plate-shaped body is disclosed in the applicant's q:f application No. sam9o7sa and l details, 1982-10418.
The container chamber that can be opened easily as described in No. 5 Meisekitsu may also be used, thereby making it possible to create a can that can be opened easily. In order to vent air and prevent molding of the entire container when the container of the present invention is packaged with military equipment, it is recommended to provide a hole of an appropriate size in the tray.

[Brief explanation of the drawing]

The drawings show an example of boiling the container body according to the present invention. A perspective view of the male mold used, Figure 4 is a Δ, '# congratulations diagram of the same female Venus, and Figure 5 is a plan view showing the orchid of the lifting platform that made the female mold look like a female mold. , FIG. 6 is a perspective view showing another embodiment of the present invention, and FIG. 7 is an exploded perspective view of the container (I J is the lid body, (
11A is a cross-sectional view showing the relationship between the container body and the lid, and FIG. 9 is an IJ'J'r side view of the container according to the present invention. , IIB, 12A, 12B, 15A, 13B, 1
4A. 14B...Remainder of multilayer base material (prayer insert) 40...Following direction shield 41...Container body [multilayer base material] 42...Lid (multilayer base material) 44...Container body Resin layer (inner oil) 45... Body resin material (inner layer) 46... Lid body gold its foil layer 47... Contents body (M (fat) meeting! (outer) m)
48... Container body thin metal layer 49...'4 Container body resin layer (outer layer) A... Lid B... Container body C... Tray patent application Person Showa Denko Co., Ltd. Agent Satoshi Masuji Yoshihiro Sato

Claims (1)

[Claims] A container body formed into a three-dimensional shape from a flat multilayer base material having at least two or more layers, the intermediate layer being a metal foil layer with a thickness of less than 40μ and a heat-meltable resin layer on both or one side thereof,
Either fold the remainder of the multilayer base material produced during the forming described in d into the corner of the container body to form a triple structure with the folded part and the multilayer base material, or fold the metal into the corner of the container body. The container body has a thin metal foil of uniform thickness gathered as vertical wrinkles in its constituent parts, a tray attached to the outer surface of the container body, and an intermediate layer with a thin metal foil layer (with heat melting on its surface). A special feature of this container is that it is made of a multilayer base material of two or more layers, and has a lid body attached to the container body.