JP2002200140A - Double-chamber type bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-chamber type bag 1, having a plurality of housing chambers 61 and 62 sectioned by a periphery part 2 and a weak seal part 5, which minimizes possible leakage of a liquid by making it resist to possible tearing of a film when the weak seal part 5 is peeled off. SOLUTION: A part of a periphery part 2 bulges into a vessel and a protrusion 4a is formed on the side at the tip of the bulged part 22. An angle exceeds 100 deg. between a tangential line L1 drawn to the shoulder part b1 of the bulged part from one base end a1 of the protrusion 4a and a tangential line L2 drawn to the shoulder part b2 of the bulged part from the other base end a2 of the protrusion 4a and the dimensional ratio b1b2/a1a2 exceeds 2. This allows the shoulder part of the bulged part 22 or a site near it to absorb a shock to the film on the boundary between the bulged part 22 and upper and lower housing chambers 61 and 62 or the film on the boundary between the bulged part 22 and the weak seal part 5 as caused when the weak seal part 5 is peeled off thereby preventing possible tearing of the film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-chamber bag having a plurality of storage chambers defined by a peripheral portion and a weak seal portion.

[0002]

2. Description of the Related Art Separation and accommodation of a combination of an infusion solution containing an amino acid and an infusion solution containing dextrose, a combination of antibiotics and a solution thereof, which may deteriorate when stored in a mixed state, are contained in one container. As a purpose, a so-called two-chamber bag having a plurality of storage chambers 61 and 62 partitioned by a weak seal portion (partition wall) 5 that can be easily peeled as shown in FIG. 6 is widely used.

[0003] If this two-chamber bag is used, one or both of the storage chambers 61 and 62 can be pressed to separate the weak seal portion 5 during use, thereby mixing the drugs stored in each chamber. The inconvenience of mixing different kinds of drugs contained in different containers can be eliminated.

[0004]

In FIG. 6, the peripheral portion 2 protrudes inwardly of the container (hereinafter referred to as the "convex portion 2").
1 ”), and its tip overlaps the weak seal portion 5. The boundary between the convex portion 21 and the weak seal portion 5, which is circled in FIG. 6, is shown in an enlarged scale in FIG. The convex portion 21 is pointed in an acute triangular shape as shown in FIG.

In terms of numerical values, a tangent L1 drawn from the intersection a1 between the convex portion 21 and the weak seal portion 5 to the shoulder b1 of the convex portion 21 and the intersection between the convex portion 21 and the weak seal portion 5 From a2,
The angle θ between the tangent L2 drawn to the shoulder b2 of the convex portion 21 is
It is 84 °. The dimensional ratio b1b2 / a1a2 is 2.2. For this reason, although there is no problem in normal use, when the bag is dropped, or when the weak seal portion 5 is broken by forcibly pulling the bag, the boundary between the convex portion 21 and the accommodation room 61 or the accommodation room 62, or There is a problem that excessive force is applied to the boundary between the convex portion 21 and the weak seal portion 5, and a pinhole-shaped hole is opened to leak the liquid.

Accordingly, an object of the present invention is to realize a two-chamber bag in which a hole is not easily opened when the weak seal portion is peeled off and there is no fear of liquid leakage.

[0007]

In the two-chamber bag according to the present invention, a part of the peripheral portion protrudes inside the container, and a protrusion is formed at a tip end of the protruding portion. The angle θ between the tangent line L1 drawn from a1 to the shoulder b1 of the overhang and the tangent L2 drawn from the other base end a2 of the projection to the shoulder b2 of the overhang is defined by the following (a ) To (e), and the dimensional ratio b1b2 / a1a2 is 2 or more (claim 1). The projections all overlap the weak seal. (a) θ ≧ 100 °, (b) θ ≧ 120 °, (c) θ ≧ 180
°, (d) θ ≧ 200 °, (e) θ ≧ 216 ° Compared with the conventional product in which the opening angle θ is 84 °, the invention product has a wider opening angle θ.

For this reason, when the weak seal portion is peeled off, a shock applied to the film at the boundary between the overhang portion and the upper and lower storage chambers or the film at the boundary between the overhang portion and the weak seal portion is provided. And a portion in the vicinity thereof can be absorbed to prevent a hole from being formed in the film. The dimensional ratio b1b2 /
It is particularly preferable that a1a2 is larger than 2.2 which is the dimensional ratio of the conventional product (claim 2).

In the two-chamber bag according to the present invention, a part of the peripheral portion protrudes into the inside of the container, and a protrusion is formed at the tip of the protruding portion. The protrusion is formed at the intersection a1 between the protrusion and the weak seal portion. The angle θ formed by the tangent L1 drawn to the shoulder b1 of the protrusion and the tangent L2 drawn to the shoulder b2 of the overhang from the intersection a2 between the projection and the weak seal portion is the above-mentioned (a)-( e) any one of the above relationships and the dimensional ratio b1b2 / a1a2 is 2 or more (claim 3).

In this configuration, the projection and the weak seal portion do not completely overlap (only partially overlap), and there is an unsealed portion between them. It is assumed that. Also in this configuration, the opening angle θ is wider than before. Therefore, when the weak seal portion is peeled off, as in the first aspect of the present invention,
The shoulder on the overhanging portion and its vicinity absorb the shock given to the film at the boundary between the overhanging portion and the upper and lower storage chambers, or the film at the boundary between the overhanging portion and the weak seal portion, and a hole is opened in the film. Can be prevented beforehand.

It is particularly preferable that the dimensional ratio b1b2 / a1a2 is larger than 2.2 (claim 4).

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an enlarged view of a main part of the two-chamber bag 1. According to the two-compartment bag 1, a part of the peripheral portion 2 protrudes inside the container (hereinafter, referred to as “protruding portion 22”). The overhang portion 22 has a rectangular shape, instead of a triangular shape as shown in FIG. 7, and has sides 3 a and 3 b rising from the peripheral portion 2 extending in parallel while facing each other. Three semicircular projections 4 a to 4 c are formed on the side of the tip, and the central projection 4 a is an overlapping portion with the weak seal portion 5.

A tangent line L1 drawn from one base end a1 of the protrusion 4a to a shoulder b1 of the protrusion 4b of the protrusion 22 and a protrusion 4c of the protrusion 22 from the other base end a2 of the protrusion 4a. Of the tangent L2 drawn to the shoulder b2 is 216 °. The radius R of the projection 4a is 5 mm, the width c of the weak seal portion 5 is 15 mm, and the distance d from the shoulder b1 to b2 is d.
Is 27 mm. The distance f between one base end a1 of the projection 4a and the other base end a2 is 8 mm, and the dimensional ratio b1b2 / a1a2.
= D / f = 27/8 = 3.375.

The body of the two-chamber bag 1 is made of plastic (including polymers and elastomers) approved for medical use.
The film is molded by a known molding method. As the film, films formed by various methods such as a blow molding method, an inflation method and a T-die method can be used. As the plastic, particularly, polyolefins such as polyethylene and polypropylene are preferably used because they have excellent moldability and safety has been established.

The peripheral portion 2 of the two-compartment bag 1 is formed by, for example, heat sealing using a heat seal bar. The method of forming the weak seal portion 5 is, for example, (1) Inside the container in the weak seal portion 5 of the film constituting the two-chamber bag 1 (the innermost layer of the multilayer film when the container is made of a multilayer film). A polyethylene-polypropylene mixed resin or the like; (2) heat-sealing with the mixed resin tape sandwiched in the weak seal portion 5;
Is set at a temperature lower than the temperature at which the peripheral portion 2 is thermally fused (usually the complete fusion temperature).

FIG. 2 is an enlarged view of a main part of a two-chamber bag 1 according to another embodiment. The difference between the two-compartment bag 1 and the two-compartment bag 1 of FIG. 1 is that there is no projection 4b, 4c, and a semicircular projection 4a formed on the side of the tip of the rectangular overhang 22. There is only one in the center. Therefore, the protrusion 4 of the overhang portion 22 extends from one base end a1 of the protrusion 4a.
The angle θ formed between the tangent L1 drawn to the shoulder b1 of b and the tangent L2 drawn from the other base end of the projection 4a to the shoulder b2 of the projection 4c of the overhang 22 becomes 180 °. I have.

The radius R of the projection 4a is 5 mm, and the weak seal portion 5
Has a width c of 15 mm and a distance e from shoulders b1 to b2 of 2
8 mm. The distance f between one base end a1 of the projection 4a and the other base end a2 is 8 mm, and the dimensional ratio b1b2 / a1a2 = e /
f = 28/8 = 3.5. FIG. 3 is an enlarged view of a main part of a two-chamber bag 1 according to still another embodiment.
The difference between the two-compartment bag 1 and the two-compartment bag 1 in FIG. 2 is that the semicircular projection 4 a formed on the side of the tip of the rectangular projecting portion 22 and the weak seal portion 5 Do not completely overlap,
In the meantime, there is an unsealed part.

Intersection a1 between the projection 4a and the weak seal portion 5
The angle .theta. Between the tangent L1 drawn to the shoulder b1 of the overhang and the tangent L2 drawn to the shoulder b2 of the overhang from the intersection a2 between the projection and the weak seal portion is 158 degrees. Has become. The radius R of the projection 4a is 5 mm, the width c of the weak seal portion 5 is 15 mm, and the distance g from the shoulder b1 to b2 is 34 mm. The distance h between one base end a1 of the projection 4a and the other base end a2 is 6 mm, and the dimensional ratio b1b2 / a1a2 = g / h = 5.
It is 7.

FIG. 4 is an enlarged view of a main part of a two-chamber bag 1 according to still another embodiment. With this two-chamber bag 1,
The difference from the two-compartment bag 1 in FIG. 1 is that the radii of the projections 4b and 4c are increased and the dimensional ratio b1b2 / a1a2 is slightly smaller. More specifically, three semicircular protrusions 4a to 4c are formed on the side of the tip of the overhang portion 22. The projections 4b and 4c at both ends are located at the center projection 4a.
The radius is larger than that. Also, the central projection 4a
Completely overlaps the weak seal portion 5.

A tangent line L1 drawn from one base end a1 of the protrusion 4a to a shoulder b1 of the protrusion 4b of the protrusion 22 and a protrusion 4c of the protrusion 22 from the other base end a2 of the protrusion 4a. Is made 205 ° with the tangent line L2 drawn to the shoulder b2. The radius R of the projection 4a is 5 mm, and the projections 4b and 4c
Is 10 mm, the width c of the weak seal portion 5 is 10 mm, and the distance d from the shoulders b1 to b2 is 23 mm. Projection 4a
The distance between one base end a1 and the other base end a2 is 10 mm, the same as the width c of the weak seal portion 5, and the dimensional ratio b1b2 / a1a2.
= D / f = 23/10 = 2.3.

[0021]

EXAMPLE An upper chamber 60 made of polyethylene having a thickness of 300 μm was used.
A drop test was performed using the two-chamber bag 1 having a capacity of 0 ml and a capacity of 1200 ml in the lower chamber. 600ml in upper room, 1 in lower room
The upper chamber was filled with 200 ml of water, and the upper chamber was weighed and pressed at a stretch to break the weak seal portion 5 and repeatedly pump the upper chamber and lower chamber several times, so that the upper chamber 22 and the storage chambers 61, 62 The boundary or the boundary between the overhang portion 22 and the weak seal portion 5 was damaged. The temperature was 20 ° C.

Then, 1000 ml was co-injected to make the total volume 2800 ml, the mixture was dropped on the floor, and the rate of occurrence of liquid leakage due to the shock was examined.

[0023]

[Table 1]

In Table 1, "conventional product" refers to a two-chamber bag 1 having the shape shown in FIGS. "Invention 2"
Is a two-chamber bag 1 having the shape shown in FIG. 2, and "Invention 1" is a two-chamber bag 1 having the shape shown in FIG. For each item, the conventional product was tested for 5 bags, and the invention products 1 and 2 were each tested for 25 bags. In the falling posture, “flat drop” refers to dropping with the wide surface of the two-chamber bag 1 horizontal as shown in FIG. “On the side drop co-injection port” means dropping from the side face with the co-injection port up as shown in FIG. 5 (b). "Below the side drop co-injection port" means dropping from the side face with the co-injection port down as shown in FIG. 5 (c). The term “boat type drop” refers to dropping with the spout facing downward as shown in FIG. "Below the hanging tool" means dropping with the spout facing upward as shown in FIG. 5 (e). "Average"
The average for all falling postures.

The drop height was set to 80 cm from above the floor. For example, with a conventional product, the liquid leakage rate was 8 at a drop height of 80 cm.
0% means that 5 bags of conventional products are dropped on a plane,
It means that liquid leakage occurred in four bags. Invented product 2 has a drop height of 80 cm and 32%, which means that invented product 2 is 25%.
When the bag was dropped on the side drop co-injection port, it means that liquid leakage occurred in eight bags. From the results in Table 1, looking at the average of the liquid leakage rate at a height of 80 cm drop, the conventional product has 85%, the invention product 2 has 19%, the invention product 1
The number has dropped sharply to 11%.

[0026]

As described above, according to the two-compartment bag of the present invention, when the weak seal portion is peeled off, no holes are opened in the film, so that there is no liquid leakage, and the failure when using the two-compartment bag. The incidence can be drastically reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a main part of a two-chamber bag 1 according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of a two-chamber bag 1 according to another embodiment.

FIG. 3 is an enlarged view of a main part of a two-chamber bag 1 according to still another embodiment.

FIG. 4 is an enlarged view of a main part of a two-chamber bag 1 according to still another embodiment.

FIG. 5 is a view showing various examples of a falling posture of a two-chamber bag.

FIG. 6 shows a plurality of storage chambers 61 partitioned by a weak seal portion 5,
It is a front view which shows the two-chamber bag which has 62.

FIG. 7 is an enlarged view of a main part showing a boundary between the convex portion 21 and the weak seal portion 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Two-chamber bag 2 Peripheral part 3a, 3b Side 4a-4c Projection 5 Weak seal part 22 Projection part 61, 62 Storage room

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AA01 BA26 BA30 BC18 EA07 FA04 HN05 HT07

Claims (4)

[Claims] 1. A two-chamber bag having a plurality of storage chambers defined by a peripheral portion and a weak seal portion, wherein a part of the peripheral portion protrudes inside the container, and a protrusion is formed on a side of a tip of the protruding portion. And a tangent line L1 drawn from one base end a1 of the projection to the shoulder b1 of the overhang, and a tangent L2 drawn from the other base end a2 of the projection to the shoulder b2 of the overhang. A two-chamber bag characterized in that the angle .theta. Made with any one of the following relations (a) to (e) and the dimensional ratio b1b2 / a1a2 is 2 or more. (a) θ ≧ 100 °, (b) θ ≧ 120 °, (c) θ ≧ 180
°, (d) θ ≧ 200 °, (e) θ ≧ 216 ° 2. The two-chamber bag according to claim 1, wherein the dimensional ratio b1b2 / a1a2 is larger than 2.2. 3. A two-chamber bag having a plurality of storage chambers defined by a peripheral portion and a weak seal portion, wherein a part of the peripheral portion protrudes inside the container, and a protruding portion is formed at a tip side of the protruding portion. Is formed, and a tangent line L1 drawn from the intersection a1 between the projection and the weak seal portion to the shoulder b1 of the overhang portion is formed.
And the tangent L2 drawn from the intersection a2 of the projection and the weak seal portion to the shoulder b2 of the overhanging portion, the following angle (a)-
(e) and the dimensional ratio b1b2 / a1
a2 is 2 or more, a two-chamber bag. (a) θ ≧ 100 °, (b) θ ≧ 120 °, (c) θ ≧ 180
°, (d) θ ≧ 200 °, (e) θ ≧ 216 ° 4. The two-chamber bag according to claim 3, wherein the dimensional ratio b1b2 / a1a2 is larger than 2.2.