JPH0298537A - Can type container - Google Patents

Abstract

PURPOSE:To obtain a vertically long can type container with bottom for which a retort treatment can be done, which has a good gas barrier property, and which is suitable for storage for a long period of time by providing the container with an inner drum, which is composed of a cylindrical shaped drum made of a multi-layer basic material and a bottom part which is made by closing the drum, and a synthetic resin outer drum which is bonded to the outer surface of the inner drum. CONSTITUTION:One side end of the lateral both side ends of a rectangular shaped multi-layer basic material 14 with gas barrier property is bent outward by a width which is required for sealing. The other side end is placed over this side end and heat-sealing is performed to make a cylindrical body. For the cylindrical body 18, the peripheral wall of the bottom part is bent inward and closed to give a bottom part, and an inner drum is formed. A folding line 19 to form this bottom part is shown by a dotted line, and a part 20 to be folded is folded inside of the cylindrical body 18. On the upper surface of the bottom part of a formed inner drum 23, a circular shaped synthetic resin film or sheet 28 is heat-sealed. The inner drum 23 is fitted in the hollow part of an outer drum 29, i.e., an outer drum which has a bottom part, of which upper part is open and which is made of a synthetic resin cylindrical shaped hollow body. Then, the outer surface of the inner drum 23 and the inner surface of the outer drum 29 are heat-bonded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plastic can-like container, and particularly to a vertically long, deep-bottomed can-like container.

[Conventional technology] While metal cans have been widely used for can-like containers such as beverage Kfi and motor oil containers filled with various beverages such as coffee, juice, and oolong tea, metal cans have been widely used as an alternative to metal 2L; Deck X1. has also been proposed.

The can-like container. 4. Generally, it is vertically elongated and has the shape of a deep one.

The τ11-like container has a high I! ! Since sterilization may be required, it is necessary that retort processing is possible, that it can be stored for a long period of time, and that it has a rich so-called gas barrier property that blocks impurities such as oxygen that spoil the contents. Xl: It is necessary to ensure that the container maintains its shape f1 without deformation or crushing during transportation and work (container crushing work).

As the bare hand of Plus Deck;h, a multilayer film having a structure in which a Δi foil is used as an intermediate layer and plastic layers are laminated on both sides is used, taking into account the above II terms.

By the way, in order to form a container with a bottom that is a three-dimensional three-dimensional object from a deck-shaped multilayer film, it is necessary to perform some kind of addition to transform it from dimensional to two-dimensional. -+
It is possible to form a can container (container main body) by molding a single sheet of film and having a nine-body shaped bottom portion inside which can store the contents.

In addition to the conventional method of forming a container body, which is a three-dimensional four-body object, from this multilayer film, so-called drawing process [(method)]
There is a method called. This method involves firmly clamping the peripheral edge of the multilayer film on a support stand.
+'fJA This is a method of applying pressure to the film from the F direction and stretching (stretching) the film in the F direction to form a container body with a depth that can accommodate the contents. It is being done.

However, since this saw method stretches a multilayer film, the thickness of the Ar1 foil becomes uneven, and pinholes and cracks are likely to occur. Therefore, it is difficult to use a thin Δβ foil, and the thickness of the Ar1 foil is usually 60 to 60%. Thick △β of about 100μ
The disadvantage is that foil must be used. This 11 makes the product cost of the h container high. Furthermore, since the method involves stretching the β-foil, it is difficult to create containers with deep bottoms, and there is also the drawback that only shallow containers can be made. .

The present inventors previously proposed the following method for manufacturing a one-dimensional container body from such a 1' provisional multilayer film (Japanese Patent Application Laid-open No. 1986-90:30;
-901:31 Publication).

That is, a multilayer film 1 as shown in FIG. 10th, 1513th
A male mold 3 as shown in the figure -4- is placed.

A folding line 100 is provided in the multilayer film 1.

Figure 15C shows the relationship between the female mold 2 and the male mold 3 in a plan view. , the four corners: ]-na part so as to create a clearance of 4.

In this way, the Kozu multilayer film 1 is shown in the developed view in Figure 14.
When pressed by the male mold 3, the first film l slides inside the middle part of the female mold 2, and a container body 5 as shown in FIG. 13 is formed.

Due to the existence of the clearance 4, the distortion (remainder of the multilayer base material) that inevitably occurs when the dimensional multilayer film 1 becomes the three-dimensional container body 4 is absorbed by a part of each corner,
It has a bottom 1-3' that can store the contents! A single container can be formed.

Therefore, according to this method, it is possible to form the container body without substantially stretching (stretching) the multilayer film, and when stretching (stretching) as described in 011, the ρ foil stretches and cracks. However, thin Aβ foil cannot be used.
This method makes it possible to use a thin Aβ foil, which has never been attempted before, and minimizes the thickness of the Δβ foil, and the thickness of the Ar1 foil becomes undesirable when the β foil is stretched. However, this problem can be solved to achieve a uniform thickness, and since a deep and thin Ar1 foil can be used, it is possible to provide a container body with low manufacturing costs. As a result of being able to use Ar1 foil, complete combustion is possible.
iJ function can solve the problem of empty can disposal: We were able to provide 11 types of containers.

In the case of item I, a similar male mold 3 and female mold 1 and 2 may be used in the same manner to form a container body 0 of the size 1 shown in Figure 1 Ei. 1. In other words, the distortion that inevitably occurs when the following multilayer film 1 is used as the container body of a two-dimensional zero-body container is shown in Fig. A container body 6 that looks like this (also,
In this case, the container body is similarly formed using a multilayer film made of thin and uniformly thick Al2fi.
It is Noh.

This container body 5.6 (container) is attached to the male mold part of the injection mold, the mold with the gate is clamped, and the synthetic resin is injected into the cavity from the gate of the gold Qlj. Then, a container body is obtained in which the injected resin layer is melted and sealed on the outer surface of the container.

By constructing the container into an elliptical shape and injection molding it in the same manner, a small elliptical can container body can be obtained.

This invention is also characterized by injection molding.In this invention, the injected resin comes into close contact with the outer surface of the container, making it a container body that can withstand strong winds.
;:, it prevents the containers from being deformed and crushed during transportation or work (stacking them as containers, peeling operations, etc.), provides practical functions, and has good adhesion. Due to its strength, retort processing is also possible.

In addition, according to this injection molding, even if unevenness is created on the inner surface of the container by wrinkles during container manufacturing, during injection molding, the wrinkles are pressed against the mold by the injected resin pieces on the inner surface of the container. Another feature is that it can be digitized.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, in order to make a round 1-hour container, in order to punch out a disc-shaped film from a multilayer film, 11. arise.

In addition, compared to conventional deep drawing processing, it is possible to obtain a container body with a deep bottom by using thinner Δ℃ foil, but this forming method has a limit in depth. Even if it is good for a person's t-drink, there is still room for several containers as a container body used for purposes such as vertically long and bottomless beverages.

Furthermore, in the horn forming method, extra width and size of the film are required to form the folds and wrinkles, and if you want to make the container body with the structure, the film part where the widths are combined is It will increase in size.

Therefore, the present invention provides 1. In view of the record, thin eight (1?ri
O) It is easy to use, solves the problem of can pollution, has a uniform thickness of AI2 foil without stretching, and is easy to process and melt, making it suitable for food products. It is rich in gas barrier properties, has +iJ ability for long-term maintenance, and is vertically long so that it can reach the bottom as deep as possible. 1. The purpose of the present invention is to provide a technology that can obtain a container similar to the one described above and that can be molded with little loss of film, and also provides a technology that takes advantage of the advantages of the prior invention by injection molding. The purpose is to

The π1 and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

A Step to Solve Problem E] The present invention involves bonding the opposite ends of a continuous quadrilateral multilayer base material having gas barrier properties and heat-sealable synthetic resin layers on both sides. When the cylinder has already been formed, it is formed into a cylinder, and when the cylinder has already been formed, the circumferential wall of the part thereof, and before the formation of the wooden cylinder, the bottom of the body of the njj multilayer base material. 1- An inner shell formed by folding the portion inward to form a closed bottom of the cylindrical body, and an outer shell made of synthetic resin joined to the outer surface of the inner shell. It is characterized by a vertically elongated bottom with a bottom as deep as possible.Made of a J1-shaped plastic deck; H-shaped container, made of a heat-sealable synthetic resin film or sheet attached to the inner surface of the closed bottom of the inner body. A can-like container according to item 1', which is made of a synthetic resin film or sheet having gas barrier properties, and which has gas barrier properties. ■ The inner surface of the closed 1st part of the inner shell and the joint part of the 1st part of the inner shell are covered with synthetic resin melted and flowed from the 1° edge of the joint part to the inner part of the 1st part, -1
- Container No. 11 as described above ■ In the container No. Ii described above, one part of the inner body is not closed and has a partially open floor, and a gas barrier - bamboo film or sheet is provided at the bottom. It is characterized by being made by pasting and closing it, making it vertically long and as deep as possible at the bottom. 81 in a can-like container.

[Function] The function of the present invention will be explained with reference to representative examples. 3. In the present invention, a multi-layer structure having sufficient thickness to form a container body of such a container such as a continuous one-channel beverage container 1i. Base material(
Film) on the river, 0,1-ru. For example, once a 1 m wide film is punched out into a rectangular shape, there is no need to further punch it out into a disk shape.

In order to provide gas barrier properties, the multilayer base material has, for example, a ΔβFi intermediate layer and synthetic resin layers laminated on both surfaces thereof. The i7A I2 foil layer is preferably as thin as possible, for example less than 40μ. The synthetic resin layer is thermally bonded (
In order to make it possible (human sealing), it should be capable of heat sealing. In addition, by joining both ends of the film, heat sealing is possible so that the +i 'F-shaped film can be made into a two-dimensional 1"F shape such as a cylinder or a square bar. make it a thing.

1) Both ends of the gas barrier multilayer base material of an appropriate size are joined to form an inner body of a cylinder or a square bar.

Various forms of joining the two ends are possible, such as a central gassho sill or a width-joining seal, but food hygiene 1,
Since the cross section of the gas barrier multilayer base H is exposed on the inner surface of the inner shell, fold the side edges of the J to prevent the cross section from being exposed, or use a gassho seal. In this case, cover the end face outward with a film, injection resin, etc.

The inner shell cannot be created by simply joining both ends of the base material.
Humans have an open MIN. Therefore, for example, a portion of the F portion of the inner shell made of a cylindrical body at a height that can form the bottom of the inner shell is folded inward to form the bottom part of the inner shell. 1
For example, folding is done by joining four folded parts across the width to form a closed bottom.

This eliminates the need to stretch (stretch) the gas barrier multilayer base material as in the past.
Even if the foil is thin, it does not cause cracks and can be made into the minimum thickness Δ2 foil within the range that does not affect the gas barrier properties.
As a result of the use of thin Δ2 foil, complete combustion is possible and the empty space X1. The processing problem can be solved, 58! In addition, when stretching the Δβ foil, the thickness of the Aβ foil is unrestricted, which can be avoided and the thickness becomes uniform, and unlike paper, the base material can be retorted. The processing is 111 times, and the base material is exposed on the inner surface of the can by one person performing the seal horn method on both sides of l2.
Foods 1Q1'[l that are prevented from touching the li contents
Furthermore, by forming the closed bottom part in the same way, it is possible to make the food hygienically more desirable.

In the present invention, by attaching a separately produced synthetic resin film or sheet that can be heat-sealed to the inner surface of the closed margin, the strength of the bottom can be reinforced. Even if the cut surface of the solder base material may come into contact with the contents of the can, the contact can be avoided by adhering the film or sheet, and food hygiene can be made even more preferable than in 1-. By using a film or sheet 1 that has gas barrier properties, the gas barrier properties can be made more layered.

Furthermore, heat seal 0J on the film or sheet.
By using a highly functional material, there is no need to use bonding materials such as adhesives, which are undesirable in terms of food hygiene, and heat sealing also makes the first manufacturing process more economical.

In the present invention, by using the inner shell as described above, it is possible to obtain an inner shell that is vertically long and has a deep bottom. In other words, the bottom can be formed by making the base material of an appropriate size and folding a part of it inward, so that the length of the inner body in the height direction can be adjusted to make the length 1:3. In addition, the i:i position of the private sector can also be considered to be a deep one, as appropriate.

And, as in the past, the base material is 1 in 9. Even in this case, there is no need to further punch out a circular shape while keeping the square shape, and film loss due to the punching can be avoided.

Furthermore, only one corner of the inner shell is needed for width matching, and compared to the conventional case where wrinkles are provided in the longitudinal direction of the periphery, the yield of (+) of the base material is increased. 4-ru.

In the present invention, an outer shell made of synthetic resin is joined to the outer surface of the inner shell.

In this case, the inner shell may be placed inside a separately manufactured outer shell made of synthetic resin and these may be thermally bonded, but as in the previous invention,
The inner shell is placed in an injection mold, and an injection molding material made of resin or the like that can form the outer shell is injected to form a container (container body) that is integrally fixed by the injection molding. hf is so good.

A separately manufactured outer shell can be heat-sealed to the inner shell as shown in 1-1 to serve as a container (container body). However, according to Type 11, in which molten injection molding material is laminated on the outer surface of the inner shell through injection molding, the adhesion with the inner shell is stronger, and therefore the strength of the container is improved. It is possible to obtain a product with a high
-, and when using a thin base +4, even a -) can have a practical function as a can, and because of its strong adhesion, even retort sterilization at high temperatures can seal the inner and outer shells of one item. It is possible to avoid separation from the body, etc. 1, and furthermore, the strength of the falling pieces 11 as ;41 is also good for people.

In the present invention, during the injection molding, the injection molding material is melted and flowed from the child ends of the seal parts at both ends of the base material to the entire bottom surface of the inner shell, and It is preferable to make the entire wave crest from the bottom to the bottom.

This strengthens the strength of the can and seals the container. Even if the cross section of the base material is exposed on the inner surface of the can, the liquid level can be adjusted to ensure food hygiene.
can be done.

Furthermore, in the present invention, the bottom of the inner shell may be left partially open without being closed. This is advantageous when the length in the vertical J direction that forms the inner body of the cylinder is insufficient, and the bottom part is closed by leaving a part open and pasting a gas barrier film or sheet to it.

[Example] Next, an example of the present invention will be described with reference to the drawings.
-4-ru.

In FIG. 5A, a small continuous horn-shaped gas barrier multilayer base material 14 is used, and C! ,do.

FIG. 513 shows an example cross-sectional view of the base material 14. An example of the base material 14 is a multilayer base material with a three-layer structure in which the intermediate layer 15 is a metal foil layer and both surfaces thereof have resin layers 16 and 17 capable of thermal bonding.

The intermediate layer 15 can be replaced with a metal foil or a sheet, but it is necessary to have so-called gas barrier properties that are impermeable to oxygen, water, etc.

A typical example of metal foil is Δβ foil, and the present invention particularly uses this Δρ foil as the intermediate layer 15 that provides gas barrier properties. Concerning the 11th container. Examples of films and sheets with gas barrier properties described in 1-1 include ethylene vinyl acetate co-Φ combination pycnic compounds, polyvinylidene chloride, etc.C)
Sleep.

The rIF of the metal foil 15 is less than 40μ, and since the present invention does not undergo a stretching process, the thickness of the multilayer base material 14, especially the metal foil 15, is uniform from beginning to end, and it is possible to use an extremely thin one.
It is also possible to construct the main body of the H vessel using items of M size.

Various resins can be used to form the resin layer 16 and 17, which is melted by the heat of the multilayer base material 14 and capable of thermal bonding (heat sealing). A polyolefin type synthetic resin such as a 1゛r combination of ethylene brobylene, etc., which has excellent heat resistance, oil resistance, and heat sealability, and does not transfer plasticizers or stabilizers from the resin into the lightning content. The example is reduced.

The thickness of the resin layer 16.17 is preferably 20 mm or more, preferably 30 mm.
~100 g.

Both ends of the rectangular gas barrier multilayer base material 14 in the rectangular direction are joined together to form a cylindrical body.As shown in FIG. Moyoiga -l', +tL! Gas barrier multilayer base material 1
4 is exposed on the inner surface of the cylindrical body 18 according to food hygiene I.
Since this may be undesirable, it is desirable to prevent the cross section (cut surface) of the base material 14 from being exposed on the inner surface when forming the cylindrical body 18.

When joining, each deity has 11 forms, such as the small central gassho seal type shown in Figure 60 (small -4'), but in the central gassho seal form, the seal part is attached to the outer body as shown in -4-, which will be described later. 613, the width part necessary for sealing one end of the base material 14 is bent outward I11 as shown in the figure, and It is preferable to beat-gill the ends of the base material 14 on both sides by tucking them together.

The cylindrical body 18 then extends the circumferential wall of its bottom portion inward by 1 h.
An inner shell is formed with a closed bottom 411-.

In FIG. 6A, the folding line 19 that should form the bottom part is made smaller by a dashed line, and the folding part 2° is folded into the inside of the cylindrical body 18.

FIG. 7Δ, FIG. 713, and FIG. 70 schematically show an example of the step of forming the bottom portion on the cylindrical body 18 by folding.

First, as shown in FIG. 7A, the center line 2I of the cylinder 18 is
Fold the 1-side circumferential portion and the lower half of it inward as shown in Fig.
, 119 are each folded inward to form a closed bottom 22 as shown in FIG. 7C.

FIG. 7D shows a perspective view of the inner body 23 having the closed bottom 22. In the present invention, both ends of the gas barrier multilayer base material 14 are lightly clipped, and an example is shown in FIG. 7C. After forming the closed bottom 22 as shown, its opposite ends may be heat sealed to form the inner shell.

In the fourth embodiment, a cylindrical body was used as an example, but in the present invention, a rectangular cylindrical body as illustrated in FIG. 71 may also be used.

Moreover, when forming the closed bottom part, a cut part may be provided in the folded part as appropriate.

In FIG. 7E, a plurality of cut portions 27 are formed in the folded portion 20 to form an inner body 26 which has a closed bottom 25 at the lower part of the rectangular tube body 24 as shown in FIG. 71. In addition, when forming the closed bottom, techniques for making paper cartons (boxes), such as cutting lines, can be applied, and the example shown in Fig. 7Δ The configuration shown in FIGS. 1 to 7C may be replaced by random overlapping.

In the present invention, as shown in Fig. 8Δ and Fig. 813,
A circular synthetic resin film or sheet 28 may be heat-sealed to the bottom surface of the inner body 23 . As a result, when the cross section of the gas barrier multilayer base material 14 is exposed inside the inner shell 23 in the closed bottom part 22,
It can be covered with the film or sheet 28, which is a preferable layer from the viewpoint of food hygiene.

The film or sheet 28 is made of, for example, a heat-sealable polyolefin synthetic resin.

Preferably, the film or sheet 28 has gas barrier properties.

Therefore, it is preferable that it is made of the same material as the gas barrier multilayer base material 14.

L-shaped inner barrel 23 according to the present invention. (26) is made of a thin gas barrier multilayer base material 14, which prevents the container from deforming or collapsing! In order to impart shape retention properties, the first
As shown in the figure, the inner shell 23 is fitted into the hollow part of the outer shell 29, that is, the outer shell 29 is made of a cylindrical hollow body made of synthetic resin and has a bottom and is partially open. The outer surface of 23 and the inner surface of the outer shell 29 are thermally bonded. The heat weld r-
For example, a method using high frequency welding can be used for this.
A high frequency wave is induced in the metal foil layer 15 of the inner shell 23 to form a thermal bond i.
This can be done by thermally melting the iJ-capable resin layer 16.

In the present invention, the outer shell 29 is manufactured separately as described in 1, and the inner shell 23 is heat-welded to the outer shell 29 with -11≦? i L/te, these inner shells 2
Although it may be a container (container main body) on the 1st floor side street consisting of 9, it is preferable to attach the inner shell 23 to the male mold part of the injection molding mold No. 30 as shown in Fig. 5. Then, clamp the injection molding mold 32 of another J with the gate 31 set to 1, and inject the injection molding key material: 3:3 into the cavity from the gate 31 of the mold 32, Inner body 2:
A molten injection molding material 33 is laminated on the outer surface of the JJ 3, thereby making the outer body 29 tightly adhered to the outer shell 29.
It is preferable to adopt the law. According to such injection molding, the outer shell 29 is closely and closely connected to the outer surface of the inner shell 2:3.
, Since the body is fixed, please use a strong electric current as the container (container body).
; ; 1 is obtained, therefore the deformation of the container, = y
It has the same effect and has strong adhesion, which makes it even more advantageous for dry tort processing.

According to the injection molding, as shown in FIG. By flowing the molten injection molding material 3 over the entire soil surface of the closed bottom 22, the closed bottom 2
2, the gas barrier multilayer base constituting the inner shell 23 +
Even if the cross section of 414 is exposed inside the inner shell 2:3, the cross section can be covered to prevent contact with the 1n contents to be filled in the inner shell 23, and also the synthetic material described in 11j Bottom part 2 closed by a resin film or sheet 28
Furthermore, even if the cross section of the gas barrier bamboo multilayer base material 14 is exposed inside the cylindrical body 18 at the overlapped sealing part as shown in FIG. can be coated, allowing for a variety of sealing methods.

The injection molding material 33 may be a synthetic resin such as polypropylene, which has excellent heat resistance against high temperatures during tort sterilization, or a polyolefin type synthetic resin such as Φ combination with ethylene polypropylene.

In the present invention, 1. An inorganic filler may be mixed with the recording resin. Mixing inorganic fillers has the following advantages.

■The stability of the can-like container (the main body of the can-like container) is improved, and the shrinkage rate is lower, which is advantageous.

(2) Heat resistance is improved, heat distortion temperature is lowered, and it is advantageous for retorting.

■It is possible to have a structure, which is a great advantage for distribution.

■ Heat conduction becomes good, giving the retort 1-i advantages.

■Costs can be reduced.

Any inorganic filler that is widely used in the fields of synthetic resins and rubber may be used. These y# and opportunistic fillers are preferably inorganic compounds that are food iQ+1-, do not react with oxygen and water, and do not decompose during kneading and molding. Examples of the inorganic filler include compounds such as metal oxides, their hydrates (hydroxides), silicate, carbonate, and silicate, their double salts, and mixtures thereof. Ru. Typical examples of inorganic fillers include aluminum oxide (alumina), its hydrate, calcium hydroxide, and magnesium oxide (magnesia).

Magnesium hydroxide, bent lead oxides, lead oxides such as lead red and lead white, magnesium carbonate, calcium carbonate, salt J, (bamboo magnesium carbonate.

White carbon, asbestos, mica, talc, glass fiber, glass powder, glass peas, clay, diatomaceous l-, silica, wollastonite, oxide, antimony oxide, titanium oxide (titania), lithopone, pumice powder, crushed aluminum acid (stone'if etc.), silica zirconium, zirconium oxide, barium carbonate, dolomite, molybdenum disulfide and iron sand. Among these inorganic fillers, those in powder form preferably have a diameter of 20 microns or more (more preferably 10 microns or more). In addition, fibrous materials have a diameter of 1 to 500 microns (
The length is preferably 1 to 300 microns) and the length is 0.1
-6 mm (preferably 01 to 51 IIm) is desirable. Furthermore, the diameter of the P& shape is preferably 30 microns or more (preferably 10 microns or more). Among these inorganic fillers, those in the form of flat plates (flake) and those in the form of wood are particularly preferred.

In addition, various additives such as pigments may be added to the injection resin.

In the present invention, when the outer shell 29 is manufactured separately, it may be made of the same material as in 1 above.

In the present invention, various additives such as pigments and inorganic fillers are added to the resin layers 16 and 17 constituting the multilayer base 14 and the heat-sealable synthetic resin film (sheet) 28. It's okay.

FIG. 1 shows an external view of a container main body 30 made up of an inner shell 23 and an outer shell 29 according to the present invention, which are assembled as shown in FIG. In the present invention, the container body 30 may be tapered, for example, as shown in FIG. 2, the container body 30 may be tapered toward the top.

Figure 3 shows a rectangular container body with a similar configuration: 30
An example is shown below.

In the present invention, this container body: 3 Q I11 can be used as a container by itself, but as shown in FIG. 4, a bottom a: 31 is attached to the container body 30,
It would be better to attach a drawer 32. As shown in the figure, a tab 3:3 is attached to the I-1 32, and by lifting the end of the tab 33, the can-like container 34 can be opened.
It is better to set it to iJ Noh.

1 - The invention made by the present inventor has been specifically explained based on Examples, but the present invention is not limited to the Examples described in 1, and modifications may be made without departing from the gist. Needless to say, it is Noh.

For example, in 1- above, the case of forming a closed bottom was described, but in Fig. 12Δ and Fig. 12! As shown in the figure, the bottom of the inner body 23 may be partially open without being closed, and a gas barrier synthetic resin film or sheet 28 may be attached to the bottom to form a closed bottom. good.

[Effects of the Invention] (1) In the present invention, the inner shell having a closed bottom part joins both ends of the gas barrier multilayer base material, and the part to form the bottom part is placed inside. Since it can be obtained by folding, it is possible to form a vertically long container (1) by adjusting the size of the base material, and it is also possible to form a 111-like container with a deep bottom. It could be used as a container.

(2) According to the present invention, even if the base materials L i11 to L are 9 m long as in the conventional case, they remain square and there is no need to further punch them into a disc shape. It was possible to reduce the loss of the base 4 due to punching.

(3) According to the present invention, only the bottom part of the inner shell is sufficient for IE binding, and compared to the conventional case where wrinkles are provided in the vertical J direction around the entire circumference, it is possible to We were able to reduce the loss due to

(4) According to the present invention, since the method for forming the inner shell as described in (1) above is used, there is no need to stretch (stretch) the gas barrier multilayer base material as in the conventional method, and the AI2 foil in the base material Even if the foil is thin, it does not cause cracks and the minimum thickness is 0) as long as the gas barrier properties are not affected.As a result of being able to use thin AI2 foil, complete combustion is possible. ,
The problem of empty can disposal can be solved, the manufacturing cost can be reduced, and the thickness of the base material tends to be unrestricted when stretching the base material, but this can be avoided and the thickness can be made uniform. Unlike those made of paper, the base material can be subjected to retort processing.

(5) In the present invention, the sealing part of the inner shell is devised, a synthetic resin film (sheet) is attached to the bottom surface of the inner shell, and the sealing part and the A resin was flowed on the bottom soil surface to prevent the cross section of the -1 U base material from being exposed on the inner surface of the can-like container and coming into contact with the contents of the can.

As a result, it was possible to obtain a can-like container that is food hygienic and more preferable.

(6) According to the present invention, in order to ensure the shape retention of the inner shell by the thin base material 1, the inner shell G is brought into close contact with the outer shell. As a result,;1. The practical function as a container can be ensured sufficiently, and the deformation of the can can be prevented during transportation of Xll. The peel strength between the inner shell and the outer shell is improved even during retorting at high temperatures, and the strength of MS < ji is also improved. I was able to do that.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a can-like container (container body) showing an embodiment of the present invention, Fig. 2 is a perspective view showing an example of the same, and Fig. 3 is a perspective view of another example of the same. Fig. 4 shows an embodiment of the present invention; Fig. 5A is a perspective view of a 1/11 container; Fig. 5A is a perspective view of an embodiment of the gas barrier multilayer key used in the invention; FIG. 5A is a perspective view of a small 1' cylindrical body according to an embodiment of the present invention; FIG. The figures are perspective views of a cylindrical body showing other embodiments of the present invention, Figures 7A to 7C.
Each figure shows a closed bottom portion of the inner shell according to the present invention]
Fig. 7D is a perspective view of the inner shell showing the embodiment of the present invention, Fig. 7E is a small exploded view of the embodiment of the present invention;
Figure 7 is a perspective view of the main parts of a rectangular inner shell showing an embodiment of the present invention, Figures 8A and 8B are explanatory diagrams of steps in an embodiment of the present invention, and Figure 9 is an embodiment T of the present invention. A cross-sectional view of the culm, FIG.
FIG. 11 is an explanatory diagram showing a part of the process of an embodiment of the present invention in cross section, FIGS. 12A and 12B are explanatory diagrams of steps of other embodiments of the present invention, and FIG. 13 is a conventional diagram. A perspective view showing an example; FIG. 14 is a developed view showing a conventional example; FIG. 15A;
FIG. 15B and FIG. 15C are explanatory diagrams of a conventional mold, respectively, and FIG. 16 is a perspective view showing the conventional example. 4...Gas barrier multilayer base material 18...Cylindrical body 20...Folded part 22...Closed bottom 32 32 ・Inner body・Square cylindrical body・Closed bottom・Inner body・Synthetic 11n film, shell, outer shell, injection mold, injection molding material Fig. 1 Fig. 2

Claims (1)

[Scope of Claims] 1. A continuous quadrilateral multilayer base material having gas barrier properties and heat-sealable synthetic resin layers on both sides thereof is joined at both ends to form a cylinder. As it becomes,
When the cylindrical body has already been formed, the circumferential wall of the bottom portion of the cylindrical body is folded inward, and when the cylindrical body has not yet been formed, the portion of the multilayer base material that is to form the bottom of the body is folded inward. It is characterized by comprising an inner shell forming a closed bottom of the body torso and an outer shell made of synthetic resin joined to the outer surface of the inner shell. A plastic can-like container. 2. The can-like container according to claim 1, wherein a heat-sealable synthetic resin film or sheet is adhered to the inner surface of the closed bottom of the inner body. 3. The can-like container according to claim 2, wherein the heat-sealable synthetic resin film or sheet has gas barrier properties. 4. The can-like container according to claim 1, wherein the closed bottom inner surface of the inner shell and the joint part of the inner shell are coated with a synthetic resin melted and flowed from the upper edge of the joint part to the bottom inner surface. . 5. In the can-like container according to claim 1, the bottom of the inner body is not closed but is partially open, and the bottom is closed by pasting a gas barrier film or sheet to the bottom. A plastic can-like container that is vertically elongated and has a bottom as deep as possible.