JPH10264973A - Container separated into plurality of chambers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an unsealing by a wrong operation from generating, and facilitate a required unsealing by a method wherein the bonding force of a plastic layer on the internal surface of a container, which separates and defines the container into large and small chambers, is made larger than the bonding force which laminates an internal surface layer and an external surface layer. SOLUTION: A tab is provided at a location which is close to a bonded part 6 on the external surface of a small capacity chamber, and at the bonded part 6, a sealed part 11 is formed on an internal surface layer 9, and both parts are bonded by heat-sealing to each other. On the internal surface layer 9, an external surface layer 8 is laminated, and is bonded at a bonding part 12. On the internal surface side of a large capacity chamber, a cut 4 which reaches the bonded part with the external surface layer, is provided, and a cut 5 is provided in the vicinity of the bonded part 6 on the internal surface of the small capacity chamber in the same manner. In this case, the bonding force between the internal layer and the external layer is set to be larger than the bonding force of the bonded part 6. By applying a pressure to the small capacity chamber, and applying a separating force between the internal and external layers by pulling the tab, a delamination is made to generate, and when the delamination reaches the cut 4 of the large capacity chamber, a communicating path is formed between the internal and external layers, and thus, contents in both chambers are mixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easily-openable container comprising a large chamber and a small chamber divided into a plurality of chambers. More particularly, the present invention relates to a container capable of mixing contents in a sealed state by pressurizing and communicating separated chambers.

[0002]

2. Description of the Related Art In the medical field, when a powder formulation such as an antibiotic in a vial is usually administered to a patient, a solution containing an ampoule is collected with a syringe, and the solution is injected into the vial to dissolve the powder formulation. . In some cases, it is directly administered to a patient via a syringe, and in other cases, the dissolved drug is diluted with physiological saline and administered to the patient. In both cases, it is difficult to dissolve and administer aseptically.In addition, in the event of an emergency, there are various steps such as opening the ampule, collecting the lysate with a syringe, injecting into a vial, and administering to the patient. Since the operation is complicated, improvement is required, and various kid products which can be mixed and dissolved easily under aseptic conditions have been developed. Japanese Patent Application Laid-Open No. 63-20550 discloses a two-chamber plastic container having a communicating means, and one of the chambers is provided with a port portion and a plug for administration to a patient. The communicating means comprises a flexible tube and a rigid ball, and moves the rigid hole to communicate the two chambers. As other communication means, a rigid tube having a breakable weakened portion, a diaphragm for sealing the tube, a hollow needle capable of penetrating the tube, and the like are described. However, there is a problem that the infusion bag is complicated because it requires many steps such as production of tubes and balls. JP-A-4-364851
In this publication, a two-chamber separating portion is heat-sealed through a mixed resin piece of polyethylene and polypropylene to form a weakly sealed portion. The double-chamber container breaks the weak seal portion by pushing one chamber and communicates, but the seal portion is opened when the container is overloaded during transportation or when the container is pushed too much. Is easy to occur. Japanese Patent Application Laid-Open No. 2-1277 discloses a typical example of a kid having a glass vial, a double-ended needle, a connected body, and an infusion bag.The glass vial moves by rotating the connected body, and is connected to the double-ended needle.
This is a mechanism that allows the vial and the infusion bag to communicate. When such a combined use of a glass vial bottle and a bag is discarded after use, it is necessary to separate the glass bottle from other plastic parts and discard it, which is inconvenient. JP-A-4-977
No. 51 discloses a multilayer structure in which a separation member separating two chambers has a peel strength of 30 between the two layers.
It has a strength of 0 to 800 g / 15 mm, the protruding part of the separation member needs to be 10 mm or more, and the two chambers are communicated by separating the separation part by a tab, but it is necessary to heat seal through the separation member, In addition, since the part that separates the separating member is a surface, there is a problem that a strong separating force is required. In addition, JP-A-1-240469 discloses a container in which a partition portion is heat-sealed in a rectangular shape with a width of 1 to 3 mm and communicates from one chamber. This container also has a problem in that when the container is excessively loaded during transportation or when the container is pushed excessively, pressure concentrates on the tip of the U-shaped seal portion, and the erroneous operation of opening the seal portion is likely to occur. is there.

[0003]

In a conventional separation container, if a load or pressure is applied during distribution, or if pressure is erroneously applied, the separation section is opened and the contents are often mixed.
Further, if the joining force of the separating portion is increased to prevent the opening due to such an erroneous operation, there arises a problem that the opening cannot be easily performed. The present invention provides an easy-open multi-chamber separation container in which opening due to erroneous operation does not occur.

[0004]

SUMMARY OF THE INVENTION The present invention provides a container comprising large and small chambers formed of at least two layers of plastic laminated films and separated by a joint, wherein the container is divided into large and small chambers. 1. A multi-chamber separation container, wherein the bonding strength of the plastic layer on the inner surface to be separated is greater than the adhesive strength of laminating the inner and outer layers, and the cuts are respectively provided in the inner layers of both chambers. 2. A multi-chamber separation container according to item 1, wherein a tab is provided on an outer layer on the side of the small-capacity chamber in the vicinity of a junction for separating both the large and small chambers.
Item 3. The multi-chamber separation container according to Item 1 or 2, which is not less than 15 mm. 4. 4. The multi-chamber separation container according to any one of claims 1 to 3, wherein a cut is provided in an inner surface layer near a joint portion separating the two chambers. 5. 5. The multi-chamber separation container according to any one of items 1 to 4, wherein the cut is a cut reaching a bonding portion with the outer surface layer. 6. The multi-chamber separation described in any one of Items 1 to 5, wherein the cut on the small chamber side is in a range of 0 to 3 mm from the joint, and the cut on the large chamber is a position 3 mm or more away from the joint. container. 7. 7. The multi-chamber separation container according to any one of items 1 to 6, wherein the cut has a shape along the joint along the shape of the joint. 8. 8. The multi-chamber separation container according to any one of items 1 to 7, wherein the joint located at the periphery of the container of the large / small chamber separator is a joint having no weak adhesive portion. About.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The container of the present invention is a container divided into a plurality of chambers by joining and separating the inner surface layer of the container by, for example, heat sealing or the like, and communicating the chambers separated at the time of use. This is a container for mixing and using the contents stored in each room. The wall film forming the container of the present invention is formed of at least two layers of a plastic laminated film. The laminated film is stacked and heat-sealed and joined to form a container comprising a separation chamber, and the joining force of the heat-sealed portion is set to be larger than the adhesive force for laminating the inner layer of the laminated film and the next layer. There is one feature. Paper, metal foil, and a deposited film may be laminated. The innermost layer is a plastic layer, but the outer layer may be not only a plastic layer but also a metal foil and a vapor-deposited film. Further, the outer layer may be not only a plastic layer but also a paper, a metal layer, and a deposited film.

A second feature is that cuts are arranged in the inner layer of both separated chambers. Further, the present invention provides a tab on the outer layer of the chamber near the joint. When each compartment having such a structure is filled with contents and the container is pressurized, the internal pressure presses the wall membrane and acts as a force to open the joint at the joint, but the joint at the joint is large. Do not open.
In particular, since the chamber with a large capacity has a large inner layer area, the partial pressure applied to the unit area of the inner layer surface when pressurized is small, so the joint is not opened, and the cut portion of the inner layer is farther from the joint, A tensile stress is applied, and a peeling stress does not act on the inner layer and the next layer at the cut portion, but a shear stress acts. Therefore, even if the adhesive force is weak, the next peeling from the inner layer does not occur.
In a chamber having a small capacity, the partial pressure applied to the unit area of the inner surface layer is large, but the joint separating the chambers is not opened because the joining force is large. However, since the cut in the inner layer of the chamber having a small capacity is provided near the joint, the partial pressure applied to the joint is applied to the cut, and delamination occurs between the inner layer having a small adhesive force and the next layer. However, at this time, if the tab provided on the outer surface layer of the small chamber near the joint is pulled, delamination easily occurs. The generated peeling extends and reaches the cut provided in the inner layer of the large-capacity chamber, and the inner layer and the next layer are separated between the cuts of the small chamber and the large chamber. In this way, the two chambers are communicated by a passage formed by peeling off the inner layer of the laminated film near the joint and the next layer, instead of opening the joint. It is preferable that the joining strength of the plastic layer on the inner surface of the container is 500 g / 15 mm or more, because opening of the joining portion due to erroneous operation can be prevented. The adhesive strength for laminating the inner layer and the next layer is 30 g /
When it is 15 mm or more, even when the liquid content is stored, delamination due to penetration of the content in the cut portion can be prevented, which is preferable.

[0007] The use of these multi-chamber separation containers can be considered mainly in the field of foods and pharmaceuticals. When used in these fields, sterilization is indispensable. Usually, pressure heat sterilization is used. I have. At present, there is a case where the pressure and heat sterilization treatment uses a method called an equal pressure method, which is adjusted so that the inside and outside pressures of the container are the same. Also, for the pressure and heat sterilization, the bonding strength between the inner surface layer and the outer surface layer is used. Is several tens g / 15
There is also a method that can be used even in mm. Therefore, in the present invention, the pressure which does not communicate even when a load is excessively applied is defined as a lower joining force. In the present invention, the joining force of the joining portion differs depending on the size and the content of the bag, but for example, the size of the bag is 85 * 12.
0, content: 100ml, bonding strength 500g / 15mm
If it is above, since the communication is not performed even when a load of 13 kg is applied, this value can be used as a lower joining force.

When the cuts in both chambers are provided in the vicinity of the joint, the separation distance for forming the communication path is shortened and communication is easy. It is preferable that the notch on the small chamber volume side is provided near the joining portion, because the internal pressure of the small chamber acts on the cut portion as a peeling stress and can be easily peeled. By increasing the distance of the notch in the large-capacity chamber from the joint, the pressure in the large-capacity chamber acts as shear stress on the notch and does not act as peeling stress. The size of the communication path can be suppressed by adjusting the distance without separation from the communication path. If the cut in the small-capacity chamber is 0 to 3 mm from the joint, delamination will be easy, and if the cut in the large-capacity chamber is more than 3 mm from the joint, delamination will not occur and communication due to erroneous operation will occur. Can be prevented, which is preferable. By adding a plurality of cuts on the small capacity chamber side, the distance from the joint can be easily adjusted, the formation of a communication path by delamination is easy, and the cuts reach from the inner layer to the next layer. The cut facilitates the formation of a communication path by delamination.

If the cut is formed along the joint along the shape of the joint, communication from the small-capacity chamber is easy, and formation of a communication passage due to erroneous operation can be prevented.
preferable. From the cut in the small-capacity chamber to the cut in the large-capacity chamber, when the layers are delaminated and connected, if the adhesion between the inner layer and the outer layer is very weak, the content liquid proceeds in the direction of the peripheral edge of the container. Liquid may leak. In order to prevent this, a joint without weak adhesive force is required at the joint located at the container peripheral edge.Specifically, by removing the inner layer of the joint located at the container peripheral edge, the outer layer is joined by heat welding. Prevents leakage from the periphery.

Examples of combinations of plastic layers forming a bonding surface having a low bonding force include polyethylene and polypropylene, a blend of polypropylene and polypropylene, a copolymer of a polypropylene-based polymer and a styrene-based thermoplastic elastomer, and a combination of polyethylene and P
There are a copolymer with a block copolymer of E-PP-St, a copolymer of a polypropylene-based and an ethylene-olefin copolymer-based elastomer, and the like.

[0011] Separated chambers can appropriately store liquids, solids, etc., but are most suitable for a combination that does not have good storage stability in a mixed state. Then, it is effective for a combination that does not have a long-term storage property in a liquid state. For example, pharmaceuticals that are separately housed in this manner include antibiotics powdered by vacuum freeze-drying in a small-volume chamber, and physiological saline or 5% glucose injection in a large-volume chamber. Yes, it is also possible to separate a liquid amino acid preparation in a small volume chamber and a glucose solution in a large volume and mix them immediately before use to prevent the reaction of chemicals and the reduction of efficacy. Furthermore, in the food packaging field,
Filling the powdered food into the small capacity chamber side and filling the dissolved liquid into the large capacity chamber side and mixing them at the time of eating and drinking can be used for preventing deterioration of the powdered food. A port or a plug may be provided on the large-capacity chamber side, or a suspension for suspension may be provided at an end of the chamber. The separated chamber is preferably a combination of one large-capacity chamber and one or more small-capacity chambers from the viewpoint of communication. Further, a food and drink jig such as a drinking spout and a straw may be provided in the room.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 is a plan view of the container of the present invention. Reference numeral 1 denotes a container, which is separated into a large capacity chamber 2 and a small capacity chamber 3 by a joint 6. 4 is a cut provided in the inner layer of the large capacity chamber, and 5 is a cut provided in the inner layer of the small capacity chamber. The cut is formed in a straight line along the joint and in accordance with the shape of the joint. Reference numeral 5 is provided near the junction. Reference numeral 10 denotes a joint located at the periphery of the container. If this portion has a weak bonding force, there is a risk of liquid leakage.

FIG. 2 shows a longitudinal section of the container according to the invention. A tab 7 is provided at a position near the joint on the outer surface of the small chamber 3. FIG. 3 is an enlarged view of a joint portion of the container of the present invention, and the inner surface layers 9 are joined to each other at a joint portion 6. In this example, the seal portion 11 is formed by heat sealing. In this embodiment, an inner and outer laminated film is used. The inner surface layer 9 is laminated and adhered to the outer surface layer 8, and 12 is a bonded portion between them. Reference numeral 4 denotes a notch provided in the inner layer of the large-capacity chamber and reaches a bonding portion with the outer layer. 5
The cutout provided in the inner layer of the small capacity chamber reaches the bonding portion with the outer layer, and is provided near the joint 6. When the small-capacity chamber is pressurized, the internal pressure is applied to the inner surface, but the bonding portion 6 does not peel and is not opened because the bonding force is large. On the other hand, the internal pressure acts as a peeling force between the inner layer and the outer layer through the cut 5 of the small chamber. Since the bonding strength between the inner layer and the outer layer is smaller than the bonding strength of the bonding portion 6, both layers are easily separated. When the tab provided on the outer layer of the small chamber is pulled while applying pressure to the small chamber in this way,
Since the tension of the tab is applied to the outer layer, the combined force of the internal pressure by pressurization and the tension of the tab acts as a peeling force between the inner and outer layers, so that delamination occurs. When the generated delamination extends and reaches the cut 4 of the large capacity chamber, a communication path is formed between the inner and outer layers, and the contents of both chambers are mixed. Since the opening is performed by a combination of the two means of pressurizing the small-capacity chamber and pulling the tab, opening due to an erroneous operation such as pressurization and dropping during distribution is prevented.

EXAMPLE 1 A 25 μm linear low density polyethylene (LLDPE) film in which cuts were formed at predetermined positions in a 50 μm polypropylene homopolymer (PP) film was laminated at 180 ° C. by heat bonding at a temperature of 180 ° C. Was formed. With the LLDPE of this laminate as the inner surface, the outer dimensions, 180
A 2-compartment separation container of mm * 90 mm was molded. The size of the small capacity room is 70mm * 90mm, and the large capacity room is 110mm *
It was 90 mm. The cut position of the large-capacity chamber was 3 mm from the joint, the length was 40 mm, and the shape was the same linear shape as the joint. Also, the cut position of the small capacity chamber was 1 mm from the joint, the length was 40 mm, and the shape was the same linear shape as the joint. A trapezoidal tab was attached to the outer layer near the junction of the small capacity chamber. The small capacity chamber is filled with 1 g of ascorbic acid (powder), and the large capacity chamber is distilled water 5 as a diluent.
0 ml was filled and sealed. The joining strength of the joining part of the two-chamber separation container was 2300 g / 15 mm, and the adhesive strength between the inner layer LLDPE and the outer layer PP was 35 to 45 g / 15 mm.

(Communication test) Even if the large-capacity chamber is pressed by hand,
There was no peeling of the joint, no permeation of distilled water from the notch in the large capacity chamber, and no leakage of liquid. By separating both tabs of the small-capacity chamber, the separation of the inner layer and the outer layer proceeds easily from the cut of the small-capacity chamber as a starting point, and the separated portion proceeds to the notch of the large-capacity chamber to form a communicating part, thereby forming a large capacity. Distilled water in the chamber entered the small volume chamber and dissolved the ascorbic acid powder. By squeezing the solution into and out of both chambers by compressing the large or small chambers,
An ascorbic acid solution was formed without exposure to outside air. Also, these operations did not cause problems such as solution leakage.

Examples 2 and 3 and Comparative Examples 1 and 2 The thermal bonding temperature between the LLDPE of the inner layer and the PP of the outer layer was changed to change the adhesive force of the inner and outer layers.
Except for g / 15 mm or more, the same two-chamber separation container as in Example 1 was formed, and the same communication test as in Example 1 was performed. Table 1 shows the communication test results.

[0018]

[Table 1]

Examples 4, 5, and 6 and Comparative Examples 3 and 4 A resin mixing ratio of polypropylene homopolymer (PP) to linear low density polyethylene (LLDPE) was 1: 0.
Mixed resin 25 consisting of 2: 1, 1: 1, 1: 2, 0: 1
A .mu.m film was formed, cut into predetermined positions, and a 50 .mu.m PP film was thermally bonded to form a laminate of a mixed resin film / PP film. With the mixed resin film of the laminate as the inner surface,
A two chamber separation container of mm * 90 mm was molded under various heat sealing conditions (temperature and pressure). The size of the small room is 70
mm * 90 mm, and the large capacity chamber was 110 mm * 90 mm. The cut position of the large-capacity chamber was 3 mm from the joint, the length was 40 mm, and the shape was the same linear shape as the joint. The cut position of the small capacity chamber is 1m from the joint.
At the position of m, the length was 40 mm and the shape was the same linear shape as the joint. A trapezoidal tab was attached to the outer layer near the junction of the small capacity chamber. Ascorbic acid (powder) 1 in small volume room
g in a large capacity chamber and 50 ml of distilled water as a diluent.
And sealed. The adhesive strength of these laminates and 2
Table 2 shows the bonding strength of the chamber separation container. The continuity test of these two-chamber separation containers was carried out by the method described in Example 1, and the results are shown in Table 2.

[0020]

[ Table 2 ]

Comparative Examples 5 and 6 The communication test described in Example 1 was carried out using a two-chamber separation container formed by the method shown in Example 1 except that a predetermined cut portion was processed after laminating the inner and outer layers. Table 3 shows the results. The adhesive strength of these two-chamber separation containers is 35
g ~ 45g / 15mm, bonding force is 2000g ~ 230
It was 0 g / 15 mm. The cutting method was formed by pressing a blade from the inner surface side of the laminate, and the depth was adjusted by pressing. After forming the cut portion, the cut depth was observed by observing the cross section of the cut portion.

[0022]

[ Table 3 ]

Examples 7 to 11 and Comparative Examples 7 and 8 Formed by the method shown in Example 1 except that the positions of the cuts of the inner surface layers of the small capacity chamber and the large capacity chamber were changed from the junction. The communication test described in Example 1 was performed using the two-chamber separation container thus prepared, and the results are shown in Table 4. The adhesive strength of these two-chamber separation containers is 35 g to 50 g / 15 m.
m, and the bonding force is 1900 g to 2500 g / 15 mm
Met.

[0024]

[ Table 4 ]

Example 12 A two-chamber separation container formed by the method shown in Example 1 was used, except that one to four notches in the small capacity chamber were machined in parallel at intervals of 2 mm. A communication test was performed. The adhesive strength of these two-chamber separation containers is 35 g to 50 g.
/ 15 mm, and the bonding force is 1900 g to 2500 g /
It was 15 mm. If the number of cuts increases, the allowable range of the displacement of the joint formation position increases by 2 mm for each increase of one.
In addition, the formation of the two-chamber separation container was easy, and there was no problem in the communication.

Example 13 Example 1 was the same as Example 1 except that the shape of the joint was a V-shape projecting toward the small-capacity chamber, and the shape of the cutout was a V-shape along the joint. Using the two-chamber separation container formed by the method, the communication test described in Example 1 was performed. The adhesive strength of these two-chamber separation containers is 35 g to 50 g / 15 mm.
And the bonding strength was 1900 g to 2500 g / 15 mm. As a result of the communication test, there was no communication from the large-capacity chamber and no damage to the joint due to hand pressure, and the small-capacity chamber shell could easily communicate without any damage to the joint.

Example 14 A two-chamber separation container formed by the method shown in Example 1 was used, except that in the shape of the inner layer, portions corresponding to both ends of the separation part of the two-chamber separation container were missing. The communication test described in Example 1 was performed. The adhesive strength of these two-chamber separation containers is 35 g to 50 g / 15 mm, and the bonding strength is 19 g.
00 g to 2500 g / 15 mm. As a result of the communication test, the expansion of the peeled part of the inner and outer layers stopped at the gaps at both ends of the separation part of the inner layer, even if the fir treatment was performed vigorously by hand pressure
No leakage of the contents occurred, and the communication path was easily formed.

Example 15 A 25 μm linear low density polyethylene (LLDPE) film in which a notch is formed at a predetermined position in a 50 μm polypropylene homopolymer (PP) film is laminated at 180 ° C. by heat bonding at a temperature of 180 ° C. Was formed. Further, a 12 μm SiOx-deposited polyester film (a transparent SiOx film, 700 angstrom thick)
Was laminated on the PP side with a urethane-based adhesive. 25 μm
LLDPE, a 7 μm aluminum foil and a 12 μm polyester film were each laminated with a urethane-based adhesive to form a three-layer laminate, each of which had an LLDPE inner surface, and a 180 mm * 90 mm two-chamber separation container. Formed. The size of the small capacity room is 70mm * 90mm,
The large capacity chamber was 110 mm * 90 mm. The notch position of the large capacity chamber is 3 mm from the joint, and the length is 4
The 0 mm shape was the same linear shape as the joint. The cut position of the small capacity chamber is 1 mm from the joint and the length is 4 mm.
0 mm, the shape was the same linear shape as the joint. A trapezoidal tab was attached to the outer layer near the junction of the small capacity chamber. The small capacity chamber was filled with 1 g of ascorbic acid (powder), and the large capacity chamber was filled with 50 ml of distilled water as a diluent and sealed. The joining strength of the joining part of the two-chamber separation container is 2300 g / 1.
At 5 mm, the adhesion between the inner layer LLDPE and the outer layer PP was 35-45 g / 15 mm. This was subjected to a communication test shown in Example 1. As a result, there was no communication from the large-capacity chamber and no damage to the joint due to manual pressure, and there was no damage to the joint from the small-capacity chamber, and communication was easy.

[0029]

According to the present invention, there is an effect that opening due to erroneous operation can be prevented and required opening can be easily performed.

[Brief description of the drawings]

FIG. 1 is a plan view of a multi-chamber separation container of the present invention.

FIG. 2 is a sectional view of the multi-chamber separation container of the present invention.

FIG. 3 is an explanatory view of a joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Large-capacity room 3 Small-capacity room 4 Large-capacity room side cutout 5 Small-capacity room side cutout 6 Joining part 7 Tab 8 Outer layer 9 Inner layer 10 Peripheral lamination part 11 Inner layer joining part 12 Inner and outer layer joining part

Claims (8)

[Claims] 1. A container formed of at least two layers of a plastic laminated film and comprising large and small chambers separated and separated by a joint portion, wherein a joining force of a plastic layer on an inner surface which separates and separates the container into large and small chambers. A multi-chamber separation container, which has a greater adhesive strength for laminating an inner surface layer and an outer surface layer, and wherein cuts are respectively provided in the inner surface layers of both chambers. 2. The multi-chamber separation container according to claim 1, wherein a tab is provided on an outer layer on the side of the small-capacity chamber in the vicinity of a joint separating the large and small chambers. 3. The multi-chamber separation container according to claim 2, wherein the bonding strength of the plastic layer on the inner surface of the container is 500 g / 15 mm or more. 4. The method according to claim 1, wherein the cut is provided in the inner surface layer near the joint separating the two chambers.
A multi-chamber separation container as described in the paragraph. 5. The multi-chamber separation container according to claim 1, wherein the cut is a cut reaching a bonding portion with the outer surface layer. 6. The cut on the small chamber side is 0 to 3 m from the joint.
m, and the notch on the large room side is 3 mm from the joint.
The position according to any one of claims 1 to 5, wherein the position is at least the distance apart.
A multi-chamber separation container as described in the paragraph. 7. The joint according to claim 1, wherein the cut has a shape along the joint along the shape of the joint.
A multi-chamber separation container as described in the paragraph. 8. The multi-chamber separation container according to claim 1, wherein the bonding portion located at the periphery of the container of the large and small chamber separation portion is a bonding portion having no weak adhesive portion.