WO2015146759A1

WO2015146759A1 - Medical container

Info

Publication number: WO2015146759A1
Application number: PCT/JP2015/058160
Authority: WO
Inventors: 糸瀬一徳; 山口剛之
Original assignee: テルモ株式会社
Priority date: 2014-03-27
Filing date: 2015-03-19
Publication date: 2015-10-01
Also published as: JPWO2015146759A1; JP6564766B2

Abstract

The container body (12) of a medical container (10) is formed by welding two sheets (20) together into a bag shape. The seal section (24) of the container body (12) has a first seal section (31) which is formed on the mouth (14) side, a second seal section (32) which is formed on the side opposite the mouth (14), and a pair of side seal sections (34) extending between the first seal section (31) and the second seal section (32). Each of the side seal sections (34) is provided with a protrusion (36) protruding toward the inside of the container body (12). The medical container (10) is sterilized by heating.

Description

Medical container

The present invention relates to a medical container having a container body formed by welding two sheets into a bag shape.

Conventionally, a medical container (so-called soft bag) having a container body formed as a bag by bonding two flexible resin sheets by welding as a kind of medical container such as a chemical container or an infusion container Is known (see, for example, Japanese Patent Laid-Open No. 8-155009). The sheet constituting the container body of the soft bag is made of a material having transparency so that the remaining liquid amount of the content liquid filled in the container body can be visually recognized. Moreover, the scale which shows the amount of residual liquid is normally attached | subjected to the container main body. When the soft bag is used (drained), the remaining amount of the content liquid can be confirmed from the positional relationship between the liquid level of the content liquid and the scale attached to the container body.

In the case of a conventional soft bag, two sheets constituting the container body may stick to each other in the container body. In particular, in the case of a soft bag with an amount of content liquid of 200 mL or less, the two sheets are close to each other when the content liquid is filled in the container body, so that the two sheets are stuck to each other during drainage. Likely to happen. When such sticking between sheets occurs near the liquid level during drainage, the liquid level is curved at the sticking point, making it unclear where the liquid level is in relation to the scale, and as a result It becomes difficult to grasp the remaining liquid amount.

In order to prevent sticking between sheets near the liquid surface, for example, when filling the liquid into the container body, additional air is injected to leave the remaining amount (air remaining in the container body in an unused state). To increase the amount). However, the additional injection of air is disadvantageous in terms of equipment introduction cost.

The present invention has been made in consideration of such a problem, and a medical container capable of suppressing a decrease in liquid level visibility at the time of draining without accompanying an increase in the remaining amount of space more than necessary. The purpose is to provide.

In order to achieve the above object, the present invention provides a container main body having a seal portion in which two sheets are welded to each other and formed in a bag shape and extending in a circular shape along the outer edge of the liquid storage portion, A medical container comprising a mouth provided at one end of a container body and a liquid contained in the container body, wherein the seal part is a first seal formed on the mouth side. Part, a second seal part formed on the opposite side of the mouth part, and a pair of side seal parts extending between the first seal part and the second seal part, The side seal portion is provided with a bulging portion that bulges toward the inside of the container body, and the medical container is heat sterilized.

According to the medical container configured as described above, the side seal portion is provided with the bulging portion so that both side portions of the liquid storage portion of the container body are constricted. For this reason, the sheet is distorted due to shrinkage anisotropy during cooling after the sealing process (after welding) in the manufacturing process, and the sheets are difficult to stick to each other. Thereby, sticking of sheets to each other is suppressed at the time of filling the container main body with the liquid in the manufacturing process, and as a result, an appropriate remaining amount is ensured without additionally injecting air. Further, due to the shrinkage anisotropy during cooling after the heat sterilization treatment in the manufacturing process, the sheets are further distorted, and the difficulty of sticking between the sheets is enhanced. Therefore, sticking of sheets near the liquid surface is suppressed during drainage (during use), and liquid surface visibility is ensured, so that the remaining liquid amount can be easily grasped.

In the above medical container, the bulging portion may be provided at a substantially central portion in the extending direction of the side seal portion. With this configuration, it is possible to more suitably suppress sticking between sheets near the liquid surface during drainage.

Said medical container WHEREIN: Each inner side outline of the part between the said bulging part and the said 1st seal part, and the part between the said bulging part and the said 2nd seal part among the said side seal parts. The shape may have a straight line.

This configuration makes it possible to minimize the decrease in the remaining amount of air due to the provision of the bulging portion.

In the above medical container, the inner contour shape of the bulging portion may be formed in an arc shape. With this configuration, even when the internal pressure is increased by pressing the container main body from the outside, stress is not excessively concentrated on the apex of the bulging portion, and bag breakage can be prevented.

In the medical container described above, the seal width of the portion where the bulging portion is formed in the side seal portion may be larger than the seal width of the other portion. With this configuration, a sheet distortion due to shrinkage anisotropy during cooling after heating can be effectively obtained during the sealing process (welding) or the heat sterilization process in the manufacturing process.

In the above medical container, the outer contour shape of the bulging portion may be linear. With this configuration, a sheet distortion due to shrinkage anisotropy during cooling after heating can be effectively obtained during the sealing process (welding) or the heat sterilization process in the manufacturing process.

In the above medical container, the amount of the liquid may be 200 mL or less.

According to the medical container of the present invention, it is possible to suppress a decrease in the liquid level visibility during drainage without accompanying an increase in the remaining amount of space more than necessary.

1 is an overall perspective view of a medical container according to an embodiment of the present invention. It is a top view of the medical container shown in FIG. It is explanatory drawing of the use condition of the medical container shown in FIG. FIG. 4A is a graph showing a test result for an example of the present invention, and FIG. 4B is a graph showing a test result for a comparative example.

Hereinafter, preferred embodiments of the medical container according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an overall perspective view of a medical container 10 according to an embodiment of the present invention. The medical container 10 includes a bag-shaped container main body 12 having a liquid chamber 13 therein, a mouth portion 14 attached to the lower end portion of the container main body 12, a plug 16 disposed inside the mouth portion 14, And a film 18 welded to the mouth portion 14.

The medical container 10 is a container in which the container body 12 is constituted by a flexible and transparent resin sheet 20 and is a so-called soft bag. A predetermined liquid 21 is stored in the liquid chamber 13 of the container body 12 in advance. Examples of the liquid 21 accommodated in the liquid chamber 13 include physiological saline, electrolyte solution, Ringer's solution, high calorie infusion, glucose solution, water for injection, amino acid preparation, pain relieving agent, antiemetic, blood flow improving agent, free radical. Examples include a remover.

The container body 12 is composed of two sheets 20 (20a, 20b) welded at the seal portion 24. Specifically, the container body 12 includes a liquid storage portion 26 that forms the liquid chamber 13 and a seal portion 24 that extends in a circular shape along the outer edge of the liquid storage portion 26. The seal portion 24 includes a first seal portion 31 formed on the mouth portion 14 side (lower side), a second seal portion 32 formed on the side opposite to the mouth portion 14 (upper side), and a first seal portion. 31 and a pair of side seal portions 34 extending between the second seal portions 32.

The first seal portion 31 and the second seal portion 32 are portions of the seal portion 24 that extend in the width direction of the medical container 10. The first seal portion 31 is located on both sides of the mouth portion 14. The second seal portion 32 is located on the opposite side of the first seal portion 31 with respect to the liquid storage portion 26.

As shown in FIG. 2, the pair of side seal portions 34 extend along the center line C of the container main body 12 between both ends of the first seal portion 31 and the second seal portion 32. Both ends of each side seal portion 34 are connected to the first seal portion 31 and the second seal portion 32.

Each side seal portion 34 is provided with a bulging portion 36 that bulges toward the center line C side (inward) of the container body 12, so that the liquid storage portion 26 is located at the center in the height direction. It has a shape with a narrowed part. The bulging portion 36 is provided at a substantially central portion in the extending direction of the side seal portion 34. The inner contour shape of the bulging portion 36 is formed in an arc shape (arc shape). That is, the bulging portion 36 is not provided with a sharp top. The radius of curvature R of the inner contour shape of the bulging portion 36 is set to 20 to 450 mm, for example. The outer contour shape of the bulging portion 36 is formed in a straight line shape.

In the side seal part 34, on both sides of the bulging part 36, a straight part 38 whose inner contour shape and outer contour shape are linear is provided. Therefore, the outer contour shape of the side seal portion 34 is linear across the bulging portion 36 and the straight portions 38 on both sides thereof. Thus, since the straight portions 38 are provided on both sides of the bulging portion 36, the length A of the bulging portion 36 is shorter than the length L between the first seal portion 31 and the second seal portion 32. .

If the height B of the bulging portion 36 from the straight portion 38 is too small, the amount of distortion due to the shrinkage anisotropy of the sheet 20 at the time of cooling after heating, which will be described later, is insufficient, and the sheet 20 is stuck on the liquid storage portion 26. Difficult to get bitter. On the other hand, if the height B of the bulging portion 36 is too large, the effective internal volume of the container body 12 is reduced accordingly, so that the remaining amount in the container body 12 is reduced too much.

Therefore, the height B of the bulging portion 36 is smaller than the distance W between the straight portion 38 and the center line C of the container body 12. The ratio of the height B of the bulging portion 36 and the distance W between the straight portion 38 and the center line C of the container body 12 is set to, for example, 1:50 to 1: 1.5. Further, the ratio between the length A of the bulging portion 36 and the height B of the bulging portion 36 is set to 2: 1 to 60: 1, for example.

As described above, the outer contour shape of the side seal portion 34 is linear, and the bulging portion 36 protrudes toward the center line C side of the container body 12 with respect to the straight portion 38. For this reason, the seal width W1 of the bulging part 36 is larger than the seal width W2 of the other part (straight part 38) of the side seal part 34.

The scale part 40 which shows the liquid quantity of a content liquid is provided in the outer surface of the liquid storage part 26 of the container main body 12. As shown in FIG. In the case of the medical container 10 according to the present embodiment, the scale part 40 includes a plurality of scale lines 41 arranged at intervals along the length direction of the container body 12 (extending direction of the side seal part 34). Have. When draining the liquid, if the medical container 10 is hung and the mouth part 14 is directed downward, the liquid level of the content liquid (liquid 21) can be visually recognized through the transparent container body 12, and the liquid level and scale part. From the positional relationship with 40, the remaining liquid amount can be grasped.

The upper end of the container body 12 is provided with a hole 28 into which a hook portion 48 (see FIG. 3) provided on a hanger or the like can be inserted. The medical container 10 can be hung on the hanger or the like by being hooked on the hanger or the like at the hole 28.

As a constituent material of the container body 12 (sheet 20), for example, polyolefin (eg, polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer, or a mixture of two or more of these) ), Polyvinyl chloride, polyamide, polyimide, or a multilayer sheet of the above two or more polymer materials. In particular, as a constituent material of the container body 12 (sheet 20), a material in which distortion of the sheet 20 due to shrinkage anisotropy is effectively generated at the time of cooling after heating in the sealing process and the heat sterilization process of the manufacturing process, That is, it is preferable to employ a material having a large shrinkage ratio at the time of cooling after heating. Examples of such materials include polypropylene, ethylene-vinyl acetate copolymer, polyethylene, polyvinyl chloride and the like.

The mouth part 14 connected to the lower end part of the container body 12 is a part forming a fluid inlet / outlet. The mouth portion 14 is a hollow cylindrical member (in this embodiment, a hollow cylindrical shape) whose both ends are open. Examples of the constituent material of the mouth portion 14 include hard resins such as polypropylene, polyethylene, ABS resin, polycarbonate, and acrylic resin.

The plug 16 fixed to the mouth part 14 is a member that seals the mouth part 14 in an airtight and liquid-tight manner. The stopper 16 can pierce the needle provided on the syringe and the bottle needle 54 (see FIG. 3) provided on the infusion line 50, and can be liquid-tight after the needle and bottle needle 54 are removed. It is made of an elastic material so that airtightness can be maintained. That is, the plug body 16 is a so-called rubber plug.

Examples of the constituent material of the plug body 16 include various rubber materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, and silicone rubber, and polyurethane, polyester, polyamide, olefin, and styrene. Examples thereof include various thermoplastic elastomers such as systems, or mixtures thereof.

In the initial state (pre-use state) of the medical container 10, the film 18 is releasably welded to the end of the mouth portion 14, and the surface of the plug body 16 is covered with the film 18, thereby depending on the external environment. Contamination of the plug 16 is prevented. When the medical container 10 is used, the film 18 is peeled from the mouth portion 14.

Next, an example of a method for manufacturing the medical container 10 will be described.

The two

sheets

20a and 20b are obtained by applying pressure and heating the two resin sheets 20 (material sheets) superimposed on each other with a mold having a pressing surface having a shape corresponding to the seal portion 24. The seal portions 24 are formed by welding them together. Or the sheet | seat formed in the cylinder shape by inflation molding is crushed, and the seal | sticker part 24 is formed by welding the part which mutually opposes as two

sheets

20a and 20b. In this welding, the sheet 20 contracts with cooling after being heated. In this case, the sheet 20 is distorted due to the shrinkage anisotropy due to the shape of the bulging portion 36, thereby causing difficulty in sticking between the

sheets

20 a and 20 b in the liquid storage portion 26. Then, the excess part around the seal | sticker part 24 is cut | disconnected in the sheet | seat 20, and the container main body 12 is obtained.

Next, the mouth 14 is attached to the container body 12 by an appropriate joining method such as adhesion or welding. A predetermined amount of liquid 21 is filled into the container body 12 through the mouth portion 14 with the mouth portion 14 facing upward. The filling amount of the liquid 21 into the container body 12 is such that air remains in the container body 12 after filling.

In this case, in the container body 12, it is difficult for the

sheets

20 a and 20 b to stick to each other before the liquid 21 is filled, so that the liquid 21 is in a state where the

sheets

20 a and 20 b of the liquid storage unit 26 are stuck to each other. Will not be filled. Therefore, the effective internal volume as designed can be used, and the remaining amount of space can be prevented from being reduced due to sticking between the

sheets

20a and 20b.

Next, the plug 16 is attached to the mouth 14 to seal the mouth 14. Then, the film 18 is affixed on the edge part of the opening | mouth part 14 by heat welding. Thereby, the medical container 10 before heat sterilization processing is obtained.

Next, heat sterilization treatment is performed on the medical container 10. Examples of the heat sterilization treatment include autoclave sterilization at 121 ° C. for 20 minutes. In the heat sterilization process here, the sheet 20 constituting the container body 12 contracts upon cooling after heating. In this case, distortion of the sheet 20 due to shrinkage anisotropy occurs along the shape of the bulging portion 36. Therefore, even if the sheet 20 is distorted at this time, it is difficult for the

sheets

20a and 20b to stick to each other. In addition, since the flexibility of the sheet 20 constituting the medical container 10 is reduced (the rigidity is increased) through the heating and cooling by the heat sterilization process, the shape maintaining force of the sheet 20 in a distorted state is increased. Further, the difficulty of sticking between the

sheets

20a and 20b is more easily exhibited.

The medical container 10 according to the present embodiment is basically configured as described above, and the operation and effect thereof will be described below.

In use of the medical container 10, as shown in FIG. 3, the bottle needle 54 provided at the end of the infusion line 50 (end of the infusion tube 52) is pierced through the plug body 16 and provided on the hanger or the like. By hooking the medical container 10 on the hook portion 48 at the position of the hole 28, the medical container 10 is suspended with the mouth portion 14 facing downward. When the bottle needle 54 penetrates the plug body 16, the lumen of the infusion line 50 communicates with the inside of the liquid storage portion 26 (liquid chamber 13) of the container body 12. The liquid 21 is discharged from the medical container 10 and supplied to the patient via the infusion line 50.

During drainage, the amount of liquid remaining in the medical container 10 can be grasped from the positional relationship between the liquid level Lv1 of the liquid 21 seen through the transparent container body 12 and the scale portion 40 provided on the container body 12. it can. In the case of the medical container 10, in the liquid storage part 26 of the container body 12, the

sheets

20 a and 20 b near the liquid surface are attached to each other due to the effect of the bulging part 36 (constriction of the liquid storage part 26) of the side seal part 34. Since the sticking is suppressed, the liquid level Lv1 of the liquid 21 is horizontal (straight) over the width direction of the liquid container 26. For this reason, it is easy to understand the positional relationship between the liquid level Lv1 and the scale portion 40, and it is easy to grasp the remaining liquid amount.

On the other hand, if the side seal portion 34 is not provided with the bulging portion 36, the sheet 20 is distorted by shrinkage anisotropy during the sealing process in the manufacturing process (when the

sheets

20a and 20b are welded together). Does not occur. For this reason, before filling the container body 12 with the liquid 21 in the manufacturing process, for example, as shown by the phantom line in FIG. 2, a sticking portion S1 between the

sheets

20a and 20b is generated in the vicinity of the side seal portion 34. Cheap. When such a sticking portion S1 occurs, the amount of remaining space in the container body 12 after filling the liquid 21 is reduced by the amount that the effective internal volume of the container body 12 is reduced. Is likely to stick.

In the case where the bulging portion 36 is not provided in the side seal portion 34, the sheet 20 is not distorted due to the shrinkage anisotropy during the heat sterilization process in the manufacturing process. For this reason, for example, as shown by an imaginary line in FIG. 3, a sticking portion S <b> 2 between the

sheets

20 a and 20 b near the liquid surface is likely to occur during drainage. When such a sticking portion S2 occurs during drainage, a curved liquid level Lv2 appears. In the case of the curved liquid level Lv2, it is difficult to understand the positional relationship with the scale portion 40, so it is difficult to grasp the remaining liquid amount.

In order to confirm the effect of the present invention, various tests were performed on the present invention (Examples) and comparative examples as follows. In the present invention and comparative examples used for each test, the constituent material of the container body (sheet) is polypropylene, the sheet thickness is 250 μm, the welding conditions of the sheet are welding temperature 215 ° C., welding time 2 seconds, pressure 0.3 MPa, contents The liquid was 106 mL (city water). In the present invention, the side seal portion is provided with a bulge portion, the height of the bulge portion (height B in FIG. 2) is 2 mm, the internal size of the liquid storage portion is 92 mm at the location of the straight portion, It was set to 88 mm at the location. On the other hand, in the comparative example, there was no bulging part, and the internal dimension of the liquid storage part was 92 mm.

FIG. 4A is a graph showing the test results regarding the state of generation of the remaining amount after filling the container main body (before heat sterilization treatment), and FIG.

As shown in FIG. 4B, in the case of the comparative example in which the side seal part does not have a bulging part (constriction of the liquid storage part), there is a variation in the remaining amount, and in particular, a small remaining amount (less than 15 mL) where the sheets easily stick together. ) Specimens were seen. In the comparative example, the remaining empty volume of 15 to 20 mL had the largest distribution.

On the other hand, as shown in FIG. 4A, in the case of the embodiment of the present invention in which the side seal portion has the bulging portion (constriction of the liquid storage portion), there is little variation in the remaining amount, and in particular, the sheets are likely to stick to each other. A sample with a small residual volume (less than 15 mL) was not generated. Further, in the examples of the present invention, the distribution with the largest remaining amount of 20 to 25 mL was the largest distribution, which was shifted to a higher distribution compared to the comparative example. From this, it was found that according to the present invention, an effect of suppressing the generation of a small remaining amount of air can be expected.

Table 1 below is a table showing the test results regarding the state of sticking between sheets in the vicinity of the liquid surface at the time of drainage, with respect to Examples of the present invention, and Table 2 below for Comparative Examples. In Tables 1 and 2, A indicates that there is no sticking between sheets near the liquid level, and B indicates that there is sticking between sheets near the liquid level.

As shown in Table 2, in the comparative example in which the side seal part does not have a bulging part (constriction of the liquid storage part), only the specimen having a remaining amount of 25 mL or more is pasted between the sheets near the liquid level before the end of drainage. No stickiness occurred. That is, in the comparative example, the minimum required remaining amount that does not cause sticking between sheets near the liquid surface was 25 mL or more.

On the other hand, as shown in Table 1, in the example of the present invention in which the side seal portion has the bulging portion (constriction of the liquid storage portion), the specimen having a remaining amount of 16 mL or more is near the liquid surface until the end of drainage. There was no sticking between the sheets. That is, under the conditions of this test, the minimum required remaining amount that does not cause sticking between sheets near the liquid level was 16 mL or more in the present invention, whereas it was 25 mL or more in the comparative example. From this, it is understood that the present invention has an effect of suppressing the sticking between the sheets near the liquid level without increasing the remaining amount more than necessary as compared with the comparative example.

As described above, according to the medical container 10 according to the present embodiment, the side seal portion 34 is provided with the bulging portion 36 so that both side portions of the liquid storage portion 26 of the container body 12 are constricted. It has become. For this reason, the sheet 20 is distorted due to shrinkage anisotropy during cooling after the sealing process (after welding) in the manufacturing process, and the

sheets

20a and 20b are difficult to stick to each other. Thereby, sticking of the

sheets

20a and 20b to each other is suppressed when the container 21 is filled with the liquid 21 in the manufacturing process, and as a result, an appropriate remaining amount is secured. Further, due to the shrinkage anisotropy during cooling after the heat sterilization treatment in the manufacturing process, the sheet 20 is further distorted, and the difficulty of sticking between the

sheets

20a and 20b is enhanced. Accordingly, the

sheets

20a and 20b in the vicinity of the liquid level are prevented from sticking to each other at the time of draining (in use), and the liquid level visibility is ensured, so that the remaining liquid amount can be easily grasped. When the amount of the liquid 21 accommodated in the container main body 12 is 200 mL or less, since the distance between the two

sheets

20a and 20b is short, it is particularly effective to provide the bulging portion 36.

In the case of the present embodiment, the bulging portion 36 is provided at a substantially central portion in the extending direction of the side seal portion 34, so that the distortion of the sheet 20 due to shrinkage anisotropy is substantially the entire extending direction of the side seal portion 34. And the sticking between the

sheets

20a and 20b in the vicinity of the liquid level at the time of drainage can be more suitably suppressed.

In the case of this embodiment, each inner contour shape of the portion between the bulging portion 36 and the first seal portion 31 and the portion between the bulging portion 36 and the second seal portion 32 in the side seal portion 34. Is linear, it is possible to reduce the reduction in the remaining amount of air due to the provision of the bulging portion 36 as much as possible.

In the case of this embodiment, the inner contour shape of the bulging portion 36 is formed in an arc shape. With this configuration, even when the container body 12 is compressed from the outside and the internal pressure increases, stress does not concentrate on the apex of the bulging portion 36, and bag breakage can be prevented.

In the case of the present embodiment, the seal width W1 of the portion where the bulging portion 36 is formed in the side seal portion 34 is larger than the seal width W2 of the other portion (straight portion 38), and therefore the sealing process in the manufacturing process. At the time (during welding) or heat sterilization treatment, distortion of the sheet 20 due to shrinkage anisotropy during cooling after heating is effectively obtained.

In the case of this embodiment, since the outer contour shape of the bulging portion 36 is linear, it depends on the shrinkage anisotropy at the time of cooling after heating during the sealing process (at the time of welding) or the heat sterilization process in the manufacturing process. The distortion of the sheet 20 can be obtained effectively.

In the above description, the present invention has been described with reference to preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Yes.

Claims

A container body (12) having a seal portion (24) that is formed in a bag shape by welding two sheets to each other and extends in a circular shape along the outer edge of the liquid storage portion (26);
A mouth (14) provided at one end of the container body (12);
A liquid container (21) contained in the container body (12), and a medical container (10) comprising:
The seal portion (24) includes a first seal portion (31) formed on the mouth portion (14) side, and a second seal portion (32) formed on the opposite side of the mouth portion (14). A pair of side seal portions (34) extending between the first seal portion (31) and the second seal portion (32),
Each side seal portion (34) is provided with a bulging portion (36) that bulges toward the inside of the container body (12),
The medical container (10) is heat sterilized,
A medical container (10) characterized by the above.
The medical container (10) according to claim 1,
The bulging portion (36) is provided at a substantially central portion in the extending direction of the side seal portion (34).
A medical container (10) characterized by the above.
The medical container (10) according to claim 2,
Of the side seal portion (34), a portion between the bulge portion (36) and the first seal portion (31), and the bulge portion (36) and the second seal portion (32). Each inner contour shape of the portion between has a straight line,
A medical container (10) characterized by the above.
The medical container (10) according to any one of claims 1 to 3,
The inner contour shape of the bulging portion (36) is formed in an arc shape.
A medical container (10) characterized by the above.
The medical container (10) according to any one of claims 1 to 4,
Of the side seal portion (34), the seal width (W1) of the portion where the bulge portion (36) is formed is larger than the seal width (W2) of the other portion.
A medical container (10) characterized by the above.
The medical container (10) according to any one of claims 1 to 5,
The outer contour shape of the bulging portion (36) is linear.
A medical container (10) characterized by the above.
The medical container (10) according to any one of claims 1 to 6,
The amount of the liquid (21) is 200 mL or less,
A medical container (10) characterized by the above.