JP2010269132A - Medical container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical container including a weak seal part easily releasable if necessary and not released unintentionally by a fall or the like. <P>SOLUTION: The releasable weak seal part 20 partitions a storage chamber 18 storing a liquid substance. A projection 31 is formed at an edge 21, opposite to the storage chamber, of the weak seal part, and a recess 36 is formed on a storage chamber side edge 22 of the weak seal part, in a position facing the projection. The opening width of the recess is 5 mm or less. The projection side tip P0 of the recess is located on the projection side rather than a straight line L connecting both ends of the projection. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a medical container made of a flexible material and provided with a peelable weak seal portion.

  Patent Document 1 describes a bag for storing an enteral nutrient to be administered to a patient in enteral nutrition therapy. This bag is a flexible bag-like product having an openable / closable chuck seal at the top and a port through which enteral nutrients flow out at the bottom. A weak seal portion is provided between the chuck seal and the port and in the vicinity of the chuck seal. Enteral nutrients are stored in the space between the weak seal and the port. Enteral nutrition therapy is performed as follows, for example. First, the other end of the tube, one end of which is inserted into the patient's body, is connected to the port, and the enteral nutrient in the bag is administered to the patient. Thereafter, the chuck seal is opened, the weak seal portion is further peeled off, water or hot water is poured into the bag, and the chuck seal is closed again. Thereafter, the enteral nutrient remaining in the bag is administered to the patient together with water or hot water.

  Patent Documents 2 and 3 describe a bag for storing a liquid agent containing a medicine or a nutritional agent administered to a patient in parenteral nutrition therapy or peritoneal dialysis. This bag has two spaces partitioned by a peelable weak seal portion, and a port is provided in communication with one of the spaces. Different liquid agents are stored in the two spaces. For example, parenteral nutrition therapy and peritoneal dialysis are performed as follows. First, one of the two spaces is pressed to increase the pressure in the space, and the weak seal portion is peeled off. Thereby, two spaces communicate and both liquid agents are mixed. Then, the other end of the tube, one end of which is connected to the patient, is connected to the port, and the mixed solution in the bag is administered to the patient.

JP 2001-299875 A JP-A-2005-228 JP-A-9-327498

  As described above, some bags for storing a liquid substance to be administered to a patient in enteral nutrition therapy, parenteral nutrition therapy, peritoneal dialysis and the like are provided with a weak seal portion.

  The weak seal portion needs to be easily peelable when necessary, but on the other hand, it should not be unintentionally peeled except when necessary. For example, the tight seal does not easily peel off due to the pressing force applied by stacking multiple bags during transportation or by gripping the bag by hand, or when the bag is dropped. Must have strength. The conventional bags described above are not sufficient with respect to these properties.

  An object of this invention is to provide the medical container provided with the weak seal | sticker part which can be easily peeled when needed and does not peel unintentionally.

  The medical container of the present invention is a medical container made of a flexible material, including a storage chamber in which a liquid material is stored and a peelable weak seal portion that partitions the storage chamber. A convex portion is formed at an edge of the weak seal portion on the side opposite to the storage chamber, and a concave portion is formed at an edge of the weak seal portion on the storage chamber side so as to face the convex portion. ing. The opening width W of the recess is 5 mm or less. A tip of the concave portion on the convex portion side is located on the convex portion side with respect to a straight line connecting both ends of the convex portion.

  In the medical container of the present invention, the convex portion is formed on the edge of the weak seal portion on the side opposite to the storage chamber, and the concave portion is formed on the edge of the weak seal portion on the storage chamber side so as to face the convex portion. Is formed. And the front-end | tip of the convex part side of a recessed part is located in the convex part side rather than the straight line which connects the both ends of a convex part. As a result, when a peeling force that attempts to peel the weak seal portion on the opposite side of the storage chamber from the weak seal portion acts on the weak seal portion, the peel force concentrates on the tip of the convex portion and starts from the tip. As a result, peeling of the weak seal portion starts. And after peeling reaches a recessed part, peeling advances so that it may leave | separate from a recessed part on both sides of a recessed part. Therefore, the weak seal portion can be easily peeled with a weak force.

  Moreover, in the medical container of this invention, the opening width W of a recessed part is 5 mm or less. As a result, the liquid material in the storage chamber can hardly enter the recess. Therefore, even if the pressure of the liquid in the storage chamber rises due to an external pressing force or impact, the peeling force that attempts to peel the weak seal portion acts in a distributed manner on the entire weak seal portion and does not concentrate in the recess. . Therefore, it can prevent that a weak seal part peels unintentionally.

FIG. 1 is a plan view showing a schematic configuration of a medical container according to Embodiment 1 of the present invention. FIG. 2 is an enlarged plan view of a weak seal portion provided in the medical container shown in FIG. FIG. 3 is an enlarged plan view of part III of FIG. 4A to 4C are enlarged plan views sequentially illustrating how the weak seal portion is peeled from the side on which the convex portion is formed in the medical container according to Embodiment 1 of the present invention. FIG. 5 is an enlarged plan view schematically showing a peeling force applied by the liquid material in the storage chamber to the weak seal portion in the medical container according to Embodiment 1 of the present invention. FIG. 6 is a plan view showing a schematic configuration of the medical container according to Embodiment 2 of the present invention. FIG. 7A is an enlarged plan view of a weak seal portion provided in a medical container according to a comparative example, and FIG. 7B is an enlarged plan view of a portion VIIB of FIG. 7A. FIG. 8A is a perspective view showing an outline of a jig used in the opening test. FIG. 8B is a cross-sectional view showing a method for performing an opening test. FIG. 9 is a side view showing a method for carrying out the pressure resistance test.

  The medical container (hereinafter referred to as “container”) of the present invention is made of a flexible material, and preferably made of one or a plurality of sheets having flexibility. The specific material can be appropriately selected according to the type of liquid material to be stored. For example, plastic materials such as polyethylene terephthalate, nylon, polypropylene, and polyethylene can be used. Although the sheet | seat which comprises a container may be a single layer sheet, the composite sheet of 2 or more layers from which material differs for every layer may be sufficient. Furthermore, a thin film containing aluminum oxide or silica may be formed as a barrier layer. At least a part thereof may be transparent or translucent so that the amount of liquid in the container can be confirmed.

  In the present invention, the type of the liquid material stored in the container can be appropriately selected according to the use of the container. For example, any known liquid substance administered to a patient when performing enteral nutrition therapy, parenteral nutrition therapy, peritoneal dialysis, or the like may be used.

  The container includes a space for storing the liquid material, that is, a storage chamber. There is no limit to the number of storage chambers provided in the container, and it may be one or more depending on the use of the container.

  The storage chamber is formed, for example, by bonding a sheet made of the above plastic material into a bag shape. There is no restriction | limiting in particular in a joining method, For example, the heat sealing method and the ultrasonic sealing method are employable. When two sheets are joined by the heat seal method, a heat seal layer is generally provided on the surface of each sheet facing the counterpart sheet.

  At least a part of the joining portion that divides the storage chamber is formed of a weak seal portion that can be peeled irreversibly. The method for forming the weak seal portion is not particularly limited. For example, the weak seal portion can be formed by a known method such as heat sealing by sandwiching a weak welding sheet between two sheets to be joined.

  A convex portion is formed on the edge of the weak seal portion on the side opposite to the storage chamber, and a concave portion is formed on the edge of the weak seal portion on the storage chamber side. The concave portion is recessed toward the convex portion at a position facing the convex portion. In the case where the container includes a plurality of storage chambers, any one of the plurality of storage chambers only needs to be partitioned by the weak seal portion including the convex portion and the concave portion. For example, when a weak seal portion is formed between two storage chambers, a convex portion is formed on one of both end edges of the weak seal portion, and a concave portion is formed on the other side. Cases are included in the present invention.

  It is sufficient that at least one pair of the convex portion and the concave portion is formed on one weak seal portion. When only one pair of the convex portion and the concave portion is provided, the pair is preferably provided at a substantially central portion in the extending direction of the weak seal portion. When a plurality of pairs of convex portions and concave portions are provided, the pairs are preferably provided at substantially equal intervals in the extending direction of the weak seal portion.

  The shape formed by the edge of the convex portion is preferably a substantially wedge shape or a substantially mountain shape. Moreover, it is preferable that the shape which the edge of a recessed part makes is a substantially wedge shape, a substantially mountain shape, or the groove shape of a fixed space | interval.

  It is preferable that the depth of the concave portion is deep. Specifically, the tip of the concave portion on the convex portion side is located on the opposite side of the storage chamber from the straight line connecting both ends of the convex portion.

  In this way, the weak seal portion is formed with a pair consisting of a convex portion and a concave portion, so that the peeling force that separates the two sheets is opposite to the storage chamber of the weak seal portion (that is, the convex portion is formed). When applied to the two sheets on the second side), the peeling force concentrates on the tip of the convex portion, and peeling of the weak seal portion starts from the tip. And after peeling reaches a recessed part, peeling advances so that it may leave | separate from a recessed part on both sides of a recessed part. In this way, the weak seal portion can be easily peeled with a weak force.

  On the other hand, the opening width W of the recess formed at the edge of the weak seal portion on the storage chamber side is 5 mm or less (that is, 0 <W ≦ 5 mm), preferably 2 mm or less. Thus, since the opening width of the recess is narrow, the two sheets are in close contact with each other in the recess, and the liquid material hardly enters the recess. Therefore, even if the pressure of the liquid in the storage chamber increases due to an external pressing force or impact, the peeling force that separates the two sheets acts on the entire weak seal portion and does not concentrate on the recess. . Therefore, it can prevent that a weak seal part peels unintentionally.

  It is preferable that θ2 ≦ θ1 / 2 is satisfied, where θ1 is an angle formed by the edge of the convex portion and θ2 is an angle formed by the edge of the concave portion. Since the angle (opening) of the recess is relatively small in this way, the possibility of liquid material entering the recess is further reduced, so that the pressure of the liquid material in the storage chamber is reduced by an external pressing force or impact. Even if it raises, possibility that a weak seal part will peel unintentionally can further be reduced.

  The overall shape of the seal portion is preferably a substantially wedge shape or a substantially arc shape projecting on the opposite side to the storage chamber (that is, the side on which the convex portion is formed). As a result, when the peeling force acts on the seal portion from the side opposite to the storage chamber (that is, the side on which the convex portion is formed), the peeling force acts on the most protruding top portion of the seal portion. The peelability of the seal part is improved. On the contrary, when the peeling force acts on the seal portion from the storage chamber side (that is, the side where the concave portion is formed), the peeling force acts in a distributed manner on the entire seal portion. The possibility can be reduced.

  The container is preferably provided with at least one port for communicating the inside and outside of the container. There is no restriction | limiting in particular in the shape of a port, For example, according to the use etc. of a container, it can select from a well-known port suitably and can be used. The port is made of, for example, injection molding using a relatively hard resin material compared to a sheet constituting a container such as polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, ethylene vinyl acetate copolymer, thermoplastic elastomer, and polyacetal. Can be manufactured integrally. The method for joining the sheet and the port is not particularly limited, and for example, a heat seal method or an ultrasonic seal method can be adopted.

  A chuck seal that can be opened and closed may be provided on the side opposite to the storage chamber with respect to the weak seal portion. Thereby, the medical container which can be preferably used for enteral nutrition therapy, for example is realizable.

  Alternatively, the medical container may include two storage chambers for storing liquid substances, and the weak seal portion may partition the two storage chambers. Thereby, for example, a medical container that can be preferably used for peritoneal dialysis and parenteral nutrition therapy can be realized.

  Hereinafter, preferred embodiments of the present invention will be described. However, it goes without saying that the present invention is not limited to the following embodiments.

(Embodiment 1)
FIG. 1 is a plan view showing a schematic configuration of a medical container (hereinafter simply referred to as “container”) 10 according to Embodiment 1 of the present invention, which can be suitably used in enteral nutrition therapy. The container 10 is a bag (so-called pouch) formed by superposing two sheets of plastic material 11a and 11b having the same shape and having flexibility, and joining them at a seal region 12 at the periphery thereof. . In FIG. 1, a pocket zip 13, a chuck seal 14, and a weak seal portion 20 are provided in this order on the upper side of the container 10, and a port 15 is provided on the lower side of the container 10. An opening 17 for suspending the container 10 is formed in the seal region 12 opposite to the port 15.

  The pocket zip 13 is configured so that only one of the two stacked sheets 11a and 11b can be irreversibly cut along the dotted line in FIG. When the pocket zip 13 is in an uncut state, the hygienic state of the chuck seal 14 is maintained.

  The chuck seal 14 is composed of ridges and ridges respectively provided at opposed positions on the inner surfaces of the two sheets 11a and 11b that are overlaid. A liquid-tight seal is formed when the protrusions and the recesses are fitted. The fitting between the ridges and the ridges and the release thereof can be repeated any number of times.

  The weak seal portion 20 has a relatively weak adhesive force as compared with the seal region 11, and peels irreversibly when a force (peeling force) in a direction in which the two sheets 11a and 11b are separated from each other is applied to the weak seal portion 20. Can do. A storage chamber 18 in which a liquid material is stored is formed in a region between the weak seal portion 20 and the port 15.

  The port 15 communicates with the storage chamber 18 and allows the liquid material stored in the storage chamber 18 to flow out.

  FIG. 2 is an enlarged plan view of the weak seal portion 20 provided in the medical container shown in FIG. A convex portion 31 that protrudes toward the chuck seal 14 is formed on the edge 21 of the weak seal portion 20 on the side opposite to the storage chamber 18 (on the chuck seal 14 side). In addition, a concave portion 36 that is recessed toward the convex portion 31 is formed at the edge 22 on the storage chamber 18 side of the weak seal portion 20. The convex portion 31 is formed at a substantially central position of the weak seal portion 20 in the width direction of the container 10 (longitudinal direction of the weak seal portion 20, i.e., the lateral direction in FIG. 2). The concave portion 36 is formed at a position facing the convex portion 31.

  As for the portion excluding the convex portion 31 and the concave portion 36 of the weak seal portion 20, the central portion in the width direction (the portion where the convex portion 31 and the concave portion 36 are formed) protrudes on the opposite side (chuck seal 14 side) from the storage chamber 18. As a whole, it has a gentle, substantially wedge shape. The width of the weak seal portion 20 (that is, the distance between the end edge 21 and the end edge 22) is substantially constant except for the portion where the convex portion 22 and the concave portion 36 are formed, and can be 2 mm in one embodiment. .

  FIG. 3 is an enlarged plan view of a portion III including the convex portion 31 and the concave portion 36 of FIG.

  The convex portion 31 has a substantially wedge shape or a substantially mountain shape, a substantially arc 32 at the tip, straight lines 33a and 33b connected to both ends of the arc 32, and substantially arcs 34a and 34b connected to the straight lines 33a and 33b, respectively. Consists of. The angle formed by the straight line 33a and the straight line 33b (that is, the angle formed by the edge of the convex portion 31) is defined as θ1. In one embodiment, the radius of the substantially arc 32 can be 1 mm, the radius of the approximately arcs 34a and 34b can be 2 mm, and the angle θ1 can be 90 degrees.

  The recess 36 also has a substantially wedge shape or a substantially chevron shape, and includes a substantially arc 37 at the tip, straight lines 38a and 38b connected to both ends of the approximate arc 37, and substantially arcs 39a and 39b connected to the straight lines 38a and 38b, respectively. Become. The angle formed by the straight line 38a and the straight line 38b (that is, the angle formed by the edge of the recess 36) is defined as θ2. Intersections between the extension line of the edge 22 excluding the recess 36 and the extension lines of the straight lines 38a and 38b are P1 and P2, and the interval between the points P1 and P2 is the opening width W of the recess 36. In one embodiment, the radius of the substantially arc 37 can be 0.25 mm, the radius of the approximately arcs 39a and 39b can be 1 mm, the angle θ2 can be 14 degrees, and the opening width W can be 1 mm.

  Let L be a straight line connecting both ends of the convex portion 31 (in this embodiment, a point where the linear portion excluding the convex portion 31 of the end edge 21 and the substantially arcs 34a and 34b are connected). The leading end (the deepest portion of the concave portion 36) P0 of the concave portion 36 is located closer to the convex portion 31 than the straight line L. In one embodiment, the distance between P0 and the straight line L can be 0.2 mm.

  FIG. 3 is an example, and the shapes of the convex portion 31 and the concave portion 36 are not limited thereto. For example, the substantially arc 32 may be omitted, and the straight line 33a and the straight line 33b may intersect. Similarly, the substantially circular arc 37 may be omitted, and the straight line 38a and the straight line 38b may intersect. Furthermore, the substantially arcs 34a and 34b and / or the approximately arcs 39a and 39b may be omitted. The straight line 38a and the straight line 38b connected to both ends of the substantially arc 37 may be parallel to each other (that is, the angle θ2 = 0 degree). The width of the weak seal portion 20 does not need to be constant, and may decrease or increase as the convex portion 22 and the concave portion 36 are approached, for example.

  An example of a work procedure when performing enteral nutrition therapy using the container 10 according to the first embodiment configured as described above will be described below.

  The container 10 is delivered to a medical institution such as a hospital in a state where a predetermined liquid material (enteral nutrient) is stored in the storage chamber 18. At this time, the pocket zip 13, the chuck seal 14 and the weak seal portion 20 are all closed.

  Next, a PEG (Percutaneous Endoscopic Gastrostomy) tube inserted into the patient's body and the port 15 are connected via an enteral nutrition extension tube. Next, the container 10 is suspended from the irrigator base using the opening 17, and the liquid material stored in the storage chamber 18 is caused to flow into the patient's body by gravity. When the viscosity of the liquid material is high and it is difficult to administer the liquid material to the patient by gravity alone, pressure may be applied to the container 10.

  When the liquid in the storage chamber 18 has almost completely flown out, the pocket zip 13 is incised, and a force is applied to the two sheets 11a and 11b so as to separate each other, thereby opening the chuck seal 14 and the weak seal portion 20 in order. . Then, water or hot water is poured into the storage chamber 18 and the chuck seal 14 is closed. Then, again, the container 10 is suspended from the Illrigator platform, and the liquid remaining in the storage chamber 18 is administered to the patient together with water or hot water.

  Next, the effect | action of the weak seal part 20 provided in the container 10 is demonstrated.

  First, the case where the weak seal part 20 is peeled from the chuck seal 14 side will be described with reference to FIGS. 4A to 4C.

  When a force (peeling force) for separating the two sheets 11 a and 11 b is applied to the chuck seal 14 side of the weak seal portion 20, the peel force F1 is the convexity closest to the chuck seal 14 in the weak seal portion 20. It concentrates on a substantially arc 32 at the tip of the portion 31. Therefore, as shown in FIG. 4A, peeling of the weak seal portion 20 starts easily from the substantially arc 32 of the convex portion 31 as a starting point. In FIG. 4A, the area | region which attached the dot pattern among the weak seal | sticker parts 20 shows an unpeeled area | region, and the area | region where the dot pattern is not attached | subjected shows the peeled area | region. The boundary between the unpeeled area and the peeled area is referred to as “peel line” 25.

  Since the recessed part 36 is formed in the position facing the convex part 31, and the front-end | tip P0 of the recessed part 36 is located in the convex part 31 side rather than the straight line L which connects the both ends of the convex part 31, the weak seal | sticker part 20 As the peeling proceeds, the peeling line 25 will soon reach the recess 36. As shown in FIG. 4B, the recess 36 divides the peel line 25 into two peel lines 25 a and 25 b that sandwich the recess 36.

  Thereafter, as shown in FIG. 4C, the two peeling lines 25a and 25b are moved away from each other on both sides of the recess 36, and the peeling of the weak seal portion 20 proceeds.

  Thus, in the first embodiment, the weak seal portion 20 can be easily peeled off with a weak force.

  Next, a case where a pressing force is applied to the liquid in the storage chamber 18 at the time of transportation or dropping will be described with reference to FIG.

  When a pressing force is applied to the liquid material in the storage chamber 18, the pressure of the liquid material increases, and the pressure of the liquid material acts on the weak seal portion 20 as a peeling force. In FIG. 5, the arrow schematically shows the peeling force F <b> 2 that acts on the weak seal portion 20 due to an increase in the pressure of the liquid in the storage chamber 18. As described above, since the opening width W and the angle θ2 (see FIG. 3) of the recess 36 are small, when the weak seal portion 20 is not peeled, the two sheets 11a and 11b are in close contact with each other in the recess 36. Almost no liquid can enter between the sheets 11a and 11b. Therefore, the peeling force F <b> 2 due to the liquid material in the storage chamber 18 hardly acts on the concave portion 36, and acts almost uniformly on the edge 22 except the concave portion 36 of the weak seal portion 20. Since there is no portion where the peeling force concentrates on the edge 22, peeling does not start. Therefore, in a state where the liquid material is stored in the storage chamber 18, even if the pressure of the liquid material in the storage chamber 18 increases due to the pressing force applied by stacking or gripping during transportation or the impact at the time of dropping, the weak seal portion 20 does not peel unintentionally.

(Embodiment 2)
FIG. 6 is a plan view showing a schematic configuration of a medical container (hereinafter simply referred to as “container”) 60 according to Embodiment 2 of the present invention, which can be suitably used for peritoneal dialysis and parenteral nutrition therapy. is there. Similar to the container 10 of the first embodiment, this container 60 also has two sheets of plastic material 61a and 61b having the same shape that are flexible, and is joined at a seal region 62 on the periphery thereof. This is a bag-like product (so-called pouch).

  Unlike the container 10 of the first embodiment, the container 60 includes two storage chambers 68a and 68b, and the storage chambers 68a and 68b are partitioned by a weak seal portion 70 that can be peeled off. A first port 65a is provided in communication with the first storage chamber 68a above the weak seal portion 70, and a second port 65b is provided in communication with the second storage chamber 68b below the weak seal portion 70. ing.

  A predetermined liquid material is injected into the first storage chamber 68a through the first port 65a. After the liquid material is injected into the first storage chamber 68a, the first port 65a is sealed.

  A predetermined liquid material is injected into the second storage chamber 68b through the second port 65b. Further, the liquid material obtained by peeling the weak seal portion 70 and mixing the liquid material in the first storage chamber 68a and the liquid material in the second storage chamber 68b flows out to the outside through the second port 65b. .

  An opening 67 for suspending the container 60 is formed in the seal region 62 on the side opposite to the second port 65b.

  A convex portion 81 is formed on the edge 71 of the weak seal portion 70 on the first storage chamber 68a side. Further, a concave portion 86 that is recessed toward the convex portion 81 is formed on the edge 72 of the weak seal portion 70 on the second storage chamber 68b side. The convex portion 81 is formed at a substantially central position of the weak seal portion 70 in the width direction of the container 60 (longitudinal direction of the weak seal portion 70, that is, the lateral direction of the drawing in FIG. 6). The concave portion 86 is formed at a position facing the convex portion 81.

  As described with reference to FIG. 3, the opening width of the recess 86 is 5 mm or less. Further, the tip of the concave portion 86 on the convex portion 81 side (the deepest portion of the concave portion 86) is located closer to the convex portion 81 than the straight line connecting both ends of the convex portion 81. The shape of the convex part 81 and the concave part 86 can be made substantially similar to the shape of the convex part 31 and the concave part 36 of the first embodiment, for example.

  An example of a work procedure when performing peritoneal dialysis using the container 60 according to the second embodiment will be described below.

  The container 60 is delivered to a medical institution such as a hospital in a state where a predetermined liquid material is stored in the first and second storage chambers 68a and 68b.

  First, a pressing force is applied to the first storage chamber 68a. Thereby, the pressure of the liquid substance in the first storage chamber 68a increases, and the weak seal portion 70 is peeled off. Then, the liquid material in the first storage chamber 68a and the liquid material in the second storage chamber 68b are mixed.

  Next, the tube inserted into the patient's peritoneum and the second port 65b are connected via the tube. Then, the container 60 is suspended from the stand using the opening 67, and the mixed liquid in the container 60 is caused to flow into the patient's body by gravity.

  In the second embodiment, when the first storage chamber 68a in which the liquid material is stored is pressed, the pressure of the liquid material in the first storage chamber 68a increases, and the peeling force that separates the two sheets 61a and 61b. Acts on the seal portion 70. Since this force concentrates on the tip of the convex portion 81 of the weak seal portion 70, the weak seal portion 70 can be easily peeled off as in the case of the first embodiment.

  On the other hand, when the second storage chamber 68b in which the liquid material is stored is pressed, the peeling force that the liquid material in the second storage chamber 68b applies to the weak seal portion 70 is the same as in the first embodiment. It hardly acts on the concave portion 86 and acts almost uniformly on the edge 72 of the weak seal portion 70 excluding the concave portion 86. Therefore, in a state where the liquid material is stored in the second storage chamber 68b, even if the pressure of the liquid material in the second storage chamber 68b increases due to the pressing force applied by stacking or gripping during transportation or the impact at the time of dropping. The weak seal portion 70 does not peel unintentionally.

  If the pressure of the liquid material in the first storage chamber 68a is increased by the pressing force applied by stacking or gripping during transportation or the impact at the time of dropping, the weak seal portion 70 can be peeled off from the convex portion 81 as a starting point. There is sex. However, for example, when the container 60 is transported or handled in a folded state that is folded back by the weak seal portion 70, the weak seal portion 70 is peeled off even when the pressure of the liquid material in the first storage chamber 68a increases. It is possible to prevent this.

  The above-described first and second embodiments are examples, and the present invention is not limited to these and can be variously modified.

  For example, in the above-described embodiment, the overall shape of the weak seal portions 20 and 70 is a gentle substantially wedge shape with the convex portions 31 and 81 as vertices. It may be in a straight line except for the portion where the portion and the recess are formed.

  One weak seal portion may be formed with a pair of two or more convex portions and concave portions.

  One medical container may have three or more storage chambers in which liquid substances are stored. In this case, at least one of the plurality of storage chambers only needs to be partitioned by the weak seal portion of the present invention.

  Two or more ports may be provided for one storage chamber in which the liquid material is stored.

(Example)
The container 10 shown in Embodiment 1 was created using a resin multilayer composite sheet as the sheets 11a and 11b (see FIG. 1). The dimension of each part of the weak seal part 20 was as follows. 2, the total length W0 of the weak seal portion 20 is 104 mm, the distance from the straight line connecting both ends of the edge 22 of the weak seal portion 20 to the tip of the convex portion 31 (that is, the total height of the weak seal portion 20) H0 is 6 mm, The width (that is, the distance between the end edge 21 and the end edge 22 in the same direction as the distance H0) W1 in the region excluding the convex portion 31 and the concave portion 36 is constant and 2 mm. In FIG. 3, the substantially arc 32 is an arc having a radius of 1 mm, the approximately arcs 34a and 34b are arcs having a radius of 2 mm, the approximately arc 37 is an arc having a radius of 0.25 mm, and the approximately arcs 39a and 39b are arcs having a radius of 1 mm. The angle θ1 formed by the edge of the protrusion 31 is 90 degrees, the angle θ2 formed by the edge of the recess 36 is 14 degrees, and the opening width W of the recess 36 is 1 mm. The distance H1 between the top of the convex portion 31 and the center of the arc of the substantially arc 37 was 2 mm.

(Comparative example)
A container 910 was prepared in the same manner as in the above example except that the shape of the weak seal portion was different. 7A is an enlarged plan view of the weak seal portion 920 of the container of the comparative example, and FIG. 7B is an enlarged plan view of a portion VIIB of FIG. 7A. In the weak seal portion 920 of the comparative example, as shown in FIG. 7A, the end edge 922 on the storage chamber 18 side is a straight line, and the end edge 921 on the opposite side to the storage chamber 18 is a wavy curve. The total length W0 of the weak seal portion 920 was set to 104 mm, which is the same as that of the weak seal portion 20 of the example. As shown in FIG. 7B, the edge 921 is configured by alternately and repeatedly arranging a circular arc 923 that is convex on the edge 922 side and a concave arc 924 on the edge 922 side. The radius of the arc 923 is 6.25 mm, the radius of the arc 924 is 1 mm, and the arrangement pitch P of the arcs 924 is 10 mm. As for the width of the weak seal portion 920, the minimum width W2 at the arc 923 is 4 mm, and the maximum width W3 at the arc 924 is 6 mm.

(Evaluation methods)
The following opening test and pressure resistance test were performed on the container 10 of the above example and the container 910 of the comparative example, and the weak seal portions 20 and 920 were evaluated.

1. Opening Test Two substantially L-shaped jigs 100 as shown in FIG. 8A were prepared. The jig 100 includes a rectangular plate-shaped grip portion 101 having a constant thickness and a support portion 102 having a constant thickness having an arcuate edge at the tip. The angle formed by the grip portion 101 and the support portion 102 is 90 degrees. The protrusion length D1 of the support part 102 was 15 mm, and the width D2 of the support part 102 was 15 mm. The support part 102 simulates a thumb that holds the sheets 11a and 11b when a person peels off the weak seal part of the container.

  Sheets 11a and 11b constituting containers 10 and 910 of Examples and Comparative Examples were cut along pocket zips 13 (see FIG. 1). Next, the lower surfaces of the support portions 102 of the pair of jigs 100 illustrated in FIG. 8A were overlapped with each other, and the support portions 102 were inserted between the sheets 11a and 11b as illustrated in FIG. 8B. Next, the sheets 11a and 11b were held by the upper and lower chucks 110a and 110b of the tensile tester together with the holding unit 101, respectively. In this state, the chucks 110a and 110b were moved away from each other, and a tensile force was applied to the weak seal portions 20 and 920 of the containers 10 and 910 to peel off the weak seal portions 20 and 920. The tensile force was measured in the process of peeling the weak seal portions 20 and 920, and the maximum value was defined as “opening force”. For each of the container 10 of the example and the container 910 of the comparative example, the opening force of 10 samples was measured, and the average value was obtained.

2. Pressure resistance test Water was injected through the port 15 into the storage chamber 18 of the containers 10 and 910 of the examples and comparative examples, and the port 15 was closed. As shown in FIG. 9, the containers 10 and 910 into which the water was injected were placed on a rigid flat plate 111, and a compression load was applied by the compression tester 110 through the rigid flat plate 112 from above. The compressive load until the weak seal portions 20 and 920 were peeled off was measured, and the maximum value was defined as “pressure strength”. The compressive strength of 10 samples was measured for each of the container 10 of the example and the container 910 of the comparative example, and the average value was obtained.

(Evaluation results)
The average opening force of the container 920 of the comparative example was 24.3N, and the average pressure resistance was 316N.

  The opening force and pressure resistance of the container 10 of the example tended to increase when the temperature during heat sealing of the weak seal portion 20 was increased. When the temperature at the time of heat sealing was adjusted so that the average pressure resistance was comparable to that of the comparative example, a container 10 having a weak seal portion 20 having an average opening force of 14.1 N and an average pressure resistance of 333 N could be produced. did it. The container 10 has an average pressure resistance strength equivalent to that of the container 910 of the comparative example, but the average opening force is significantly smaller than that of the container 910 of the comparative example.

  Therefore, according to the present invention, it was confirmed that a container having a weak seal portion that can be easily peeled off with a weak force and hardly peels unintentionally was obtained.

  The field of application of the present invention is not particularly limited, and can be widely used for medical containers having a peelable weak seal portion. For example, it can be suitably used as a container used in enteral nutrition therapy, parenteral nutrition therapy, peritoneal dialysis and the like.

10, 60 Container 11a, 11b, 61a, 61b Sheet 12, 62 Sealing area 13 Pocket zip 14 Chuck seal 15 Port 17, 67 Opening 18 Storage chamber 20, 70 Weak seal part 21, 22, 71, 72 End of weak seal part Edges 25, 25a, 25b Peeling lines 31, 81 Protrusions 36, 86 Concavities 65a First port 65b Second port 68a First storage chamber 68b Second storage chamber

Claims (4)

A medical container comprising a storage chamber for storing a liquid substance and a peelable weak seal portion that partitions the storage chamber, and made of a flexible material,
A convex portion is formed on the edge of the weak seal portion opposite to the storage chamber,
A concave portion is formed on the edge of the weak seal portion on the storage chamber side at a position facing the convex portion,
The opening width W of the recess is 5 mm or less,
The medical container, wherein a tip of the concave portion on the convex portion side is located on the convex portion side with respect to a straight line connecting both ends of the convex portion.   The medical container according to claim 1, wherein θ2 ≦ θ1 / 2 is satisfied, where θ1 is an angle formed by an edge of the convex portion and θ2 is an angle formed by an edge of the concave portion.   The medical container according to claim 1, further comprising a chuck seal that can be opened and closed on a side opposite to the storage chamber with respect to the weak seal portion.   The medical container according to claim 1 or 2, comprising two storage chambers for storing liquid substances, wherein the weak seal portion partitions the two storage chambers.

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