JP2009066246A - Nutrient bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive nutrient bag being safely and sanitarily used without being contaminated by dust or bacteria in the nutrient bag used, for example, when giving nutrition support to patients with various types of diseases by a so-called tube feeding. <P>SOLUTION: This nutrient bag has a suspension portion 3 for suspending a bag body 1 at the upper part of the bag body 1 which has a nutrient storage chamber 10 in its inside, closing means 4 such as a zipper seal 40 at the upper part of the storage chamber 10, and opening means 5 for forming an opening portion S for opening the closing means 4 between the closing means 4 and the suspension portion 3. If necessary, an easily separable seal portion 6 is provided on the inner face of the storage chamber 10 on the lower side of the closing means 4. The easy-peel release seal portion 6 is preferably configured to be more easily separated from the upper side of the bag body than being separated from the storage chamber side of the bag body 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a nutrient bag that is used when, for example, patients with various diseases are supplemented with a so-called tube feeding method.

  In the treatment of various diseases, the improvement of nutritional status plays a major role in improving the therapeutic effect, and tube feeding is recognized as an important physiological treatment that uses gastrointestinal functions. It is positioned as one of Nutritional management by tube feeding is often long-lasting, so it is not only highly nutritious, but also has fewer accompanying symptoms such as diarrhea and abdominal bloating, and it is safer and more sanitary for flavor and convenience. An excellent formulation is awaited.

  Current nutrient bag specifications are subject to microbial contamination, and tube nutrients may be administered in large quantities of several hundred to 2000 ml per day. Therefore, tube nutrients that are contaminated with high concentrations of microorganisms cause not only gastrointestinal disorders, but also sepsis and pneumonia. In particular, it has been pointed out that patients who receive H2-blockers, antibiotics, etc., develop infection by administration of tube-feeding agents contaminated with 103 or more gram-negative bacilli.

  One cause of microbial contamination of tube feedings is microbial contamination of dosing containers and tubes. In particular, the nutrient bag and the administration tube, which are bag-type administration containers, are structurally difficult to wash and dry, and thus are susceptible to microbial contamination by repeated use (reuse). Therefore, if the nutrient bag or the administration tube is used repeatedly, it is necessary to wash and disinfect each time it is used. Disinfection is generally performed by immersion in an aqueous solution of 0.01% (100 ppm) sodium hypochlorite for 1 hour or longer. On the other hand, a cylindrical administration container that is structurally easy to clean and dry requires cleaning and drying each time it is used.

  By the way, as a nutrient bag which is a bag type administration container as described above, for example, there are those shown in Patent Documents 1 and 2 below. These are bag-like containers having a re-sealable liquid inlet, and those having a chuck seal or the like as a means for closing the re-sealable liquid inlet have been disclosed. If it is only a seal, the degree of sealing is not necessarily sufficient, and a very slight gap is generated in the chuck seal part, resulting in a substantial open state, or inadvertent opening. There is probably a fear of

  Therefore, in Patent Document 1 below, it has been proposed to provide a partition wall such as a weak seal portion that can be easily peeled off on the bag inner space side of the closing means such as the chuck seal. Since the upper part of the bag, that is, the upper part of the bag is opened, dust, bacteria, etc. enter the upper part of the opened bag, and when the closing means is opened, those dusts, bacteria, etc. enter the bag. There is a risk.

  Further, in Patent Document 2 below, the upper side of the bag above the chuck seal (uneven fitting fastener part) is continuously sealed with other peripheral parts of the bag by welding or the like, and the upper side part of the bag is sealed. When the chuck seal is opened, there is a perforation for excising the upper part of the chuck seal. However, dust, bacteria, etc. may be mixed from the perforation.

For this reason, the above Patent Documents 1 and 2 have the disadvantage that the degree of sealing is insufficient and there is a possibility of adverse effects such as infections when considering microorganisms and bacterial contamination. As described above, the nutrient bags that have been widely used so far are not necessarily guaranteed to have confidentiality or sterility at the top of a closed portion such as a chuck seal.

JP-A-2005-154017 JP 2007-7117 A

  The present invention has been proposed in view of the above problems, and when necessary, for example, when injecting a nutrient or the like into a bag, it can be easily opened and closed with high density, and the opening is sterile until used. An object of the present invention is to provide a nutrient bag that can be easily manufactured. Another object of the present invention is to produce an inexpensive nutrient bag that can avoid microbial contamination unless it is repeatedly used for hygiene purposes.

  In order to achieve the above object, a nutrient bag according to the present invention has the following configuration. That is, a suspension portion for suspending the bag body is provided at the upper portion of the bag body having a nutrient storage chamber therein, and a closing means such as a chuck seal is provided at the upper portion of the storage chamber. An opening means for forming an opening for opening the closing means is provided between the suspension part and the suspension part.

  As described above, an opening for opening the closing means is formed between the closing means such as a chuck seal provided at the upper part of the storage chamber in the bag body and the hanging part at the upper part of the bag body. By providing the opening means, for example, when opening the closing means for injecting water or hot water into the nutrient contained in the storage chamber, an opening for opening the closing means is formed by the opening means. And the said closing means can be open | released from the opening part. Therefore, until the closing means is opened, it is possible to keep the upper part in a sealed state. Dust, bacteria, etc. accumulate on the upper part of the closing means and the closing means is opened to open the closing means. It is possible to prevent dust and bacteria from entering.

  The bag body is provided with a nutrient chamber inside by welding the peripheral edges of a pair of front and rear sheet materials, and the opening means breaks a part of one sheet material of the bag body to open the opening. It is good to comprise so that a part may be formed. If comprised in that way, even if it forms the opening part of the upper part of a closing means and the closing means is opened, the said suspension part is suspended and hold | maintained to a support stand, a hanging tool, etc., without being parted from a bag main body. be able to.

  An easily peelable (easy peel) seal portion (partition wall) may be provided along the closing means on the upper part of the storage chamber below the closing means, if necessary. The easily peelable seal part is preferably peeled off from the upper side of the bag body rather than peeled from the inside of the bag body. In particular, the seal part is peeled off from the inside of the bag body. It is desirable that the difference in peel strength (tensile strength) when peeled from the upper side of the bag body is 4N or more. Further, it is desirable that the peel strength (seal strength) at the central portion in the longitudinal direction of the seal portion is 1N or more smaller than the seal strength at both ends.

  Hereinafter, a nutrient bag according to the present invention will be specifically described based on an embodiment shown in the drawings. FIG. 1 is a front view showing an embodiment of a nutrient bag according to the present invention, and FIG. 2 is an AA enlarged sectional view in FIG.

  The nutrient bag B in the illustrated example has a bag body 1 having a storage chamber 10 for housing a nutrient therein, and an outlet plug body 2 for feeding out the nutrient solution provided at a lower portion of the bag body 1. The upper part of the bag body 1 has a hanging hole 3 as a hanging part for hanging the bag body, and a closing means 4 such as a high-tight openable / closable chuck seal provided in the upper part of the storage chamber 10. The closing means 4 is always maintained in a substantially completely aseptic state, and when the closing means 4 is opened, an opening means (open peel mechanism) 5 for forming an opening for opening operation on the upper part. And an easily peelable seal portion 6 that prevents the nutrient contained in the storage chamber 10 from moving toward the closing means 4 and is easily peelable when the closing means 4 is opened. Yes.

  As shown in FIG. 2, the bag body 1 has a hollow portion inward of the surrounding joint portion 11 by joining the peripheral portions of the pair of front and rear sheet materials 1a and 1b in an airtight and watertight manner by welding or the like. While forming into a bag shape, by welding etc. in the state which made the cylindrical body which consists of synthetic resin etc. which comprise the said outlet plug 2 penetrate in the junction part 11 of the lower center part of the hollow bag-shaped bag main body 1 It is the structure fixed integrally, and makes the said hollow part the accommodating chamber 10 which accommodates a nutrient.

  The material of the sheet material 1a, 1b constituting the bag body 1 and the cylindrical body constituting the outlet plug body 2 is appropriate, and in particular, as a raw material for the sheet material 1a, 1b, a soft packaging material, The raw materials for the cylindrical body and the like are not particularly limited as long as they are suitable for the plug body. In addition, for example, a film made of a metal or the like may be laminated on each of the above-mentioned raw materials to form an oxygen barrier property, a light shielding property, or the like, or a film made of an oxide may be formed.

  Further, as the raw material characteristics of the sheet materials 1a and 1b constituting the bag body 1, for example, those having sufficient transparency, weather resistance, pinhole characteristics, tensile strength, impact resistance, and chemical resistance are desirable. Each of the sheet materials 1a and 1b may be either a single layer or a multilayer. As the sheet material having a multilayer structure, for example, a four-layer structure composed of polyamide or nylon, low-density polyethylene, linear rhoden polyethylene, and a sealant layer can be used. As the material for the sealant layer, it is desirable to use a material having good heat sealability and having an easy peel mechanism.

  In the embodiment shown in FIG. 1 as a suspending portion for suspending the bag body 1, the upper part of the bag body 1, in particular, the upper central part in the figure, and the peripheral parts of the front and rear sheet materials 1a and 1b are welded. The hanging hole 3 is provided in the joining portion 11 joined in the above, but instead of the hole 3 as described above, a structure in which a string or the like is fixed to the upper portion of the back main body 1 in a loop shape, etc. It is.

  In the present embodiment, the closing means 4 is provided with a chuck seal 40 composed of male and female chuck pieces 41 and 42 which are engaged with each other as shown in FIG. The sheet materials 1a and 1b are integrally fixed to the inner surfaces by welding or the like.

  When the closing means 4 is opened, the opening means 5 for forming an opening for opening in the upper part thereof is the back surface of the front sheet material 1a as shown in FIG. A pair of upper and lower half-cut grooves 51 and 51 are formed on the side, and a belt-like portion 50 between the half-cut grooves 51 and 51 is cut along the half-cut grooves 51 and 51.

  On one end side of the half cut grooves 51, 51 (left side in FIG. 1 in the figure), a C-shaped cut 52 is formed in the front sheet material 1a continuously from the half cut grooves 51, 51. By forming, a notch 50a for gripping continuous with the band-like part 50 is formed integrally with the band-like part 50. Further, the other end sides of the half cut grooves 51 and 51 are configured to gradually approach and converge to one point.

  The notch portion 50a is picked with a finger or the like, and the band-shaped portion 50 provided integrally therewith is cut along the half-cut grooves 51 and 51, so that the notch portion 50a and the band-shaped portion 50 are the front sheet material 1a. 2B and FIG. 3, a slit-shaped opening S is formed in the front sheet material 1a above the closing means 4 as shown in FIGS.

  The easy-peelable seal portion 6 is provided as necessary, and the configuration thereof is appropriate. In the present embodiment, the front sheet material 1a and the rear sheet material are interposed via the sealant layer 60 and the like. And formed by thermocompression bonding at a predetermined pressure. The arrangement position of the easily peelable seal portion 6 is appropriate, but in the present embodiment, it is provided on the lower side of the closing means 4 with a predetermined interval therebetween and substantially parallel thereto. The both end portions of the easily peelable seal portion 6 are continuously provided without any gap between the peripheral edge portions of the sheet materials 1a and 1b.

  The easily peelable seal portion 6 may be configured so that it can be easily peeled off from the lower side of the bag body 1, that is, from the upper side of the bag body 1, rather than from the housing chamber 10 side. The means is appropriate, but in the present embodiment, the pressure at the time of heat-pressing the easily peelable seal portion 6 is increased stepwise or continuously as it goes from the closing means 4 side to the containing chamber 10 side. By joining, the peelable seal part 6 can be peeled with a smaller force when peeled from the upper side than peeled from the lower side.

  The degree of force when peeling the easily peelable seal portion 6 is appropriate. For example, a force (peeling strength or tensile strength) necessary for peeling the easily peelable seal portion 6 from the storage chamber 10 side is used. 6-10N, the force required to peel from the upper side is 2-5N, the difference is preferably 4N or more. Further, it is desirable that the peel strength (seal strength) at the central portion in the longitudinal direction (left-right direction in FIG. 1) of the easy-peelable seal portion 6 is 1 N or more smaller than the seal strength at both ends.

  When configured as described above, after opening the closing means 4 from the opening S for the closing means opening operation formed by opening the opening means 5, and subsequently peeling the easily peelable seal portion 6, The easily peelable seal portion 6 can be easily peeled from the vicinity of the central portion in the longitudinal direction toward the housing chamber 10, and the floor surface or the like in a state where a nutrient or its raw material is housed in the housing chamber 10. Even if it falls, it can prevent that the said easily peelable seal part 6 opens carelessly and the content moves to the closing means 4 side.

  In the case of providing the easily peelable seal portion 6 that can be easily peeled as described above, it is necessary to give a seal strength that prevents the seal portion 6 from peeling when dropped in consideration of safety during use. In order to more reliably prevent peeling of the seal part 6 at the time of dropping when the sealing strength alone is not sufficient, both ends of the easily peelable seal part 6 are more than the seal part 6 as shown in FIG. It is desirable to configure the bag body 1 to be located on the inner side in the width direction (left-right direction in FIG. 1) than the corner portion 10a of the lower storage chamber 10. In the case of the figure, the width of the joints 11 on both the left and right sides of the front and rear sheet materials 1a and 1b is made wider on the upper side than on the lower side as shown in the figure, and between the wide upper joints 11 and 11 Is provided with the easily peelable seal portion 6.

  When configured as described above, when the bag is dropped on the floor or the like, the pressure of the contents stored in the storage chamber 10 tends to concentrate on the corner 10a of the storage chamber 10, but at a position avoiding the corner 10a. Providing the easily peelable seal portion 6 makes it possible to more reliably prevent the seal portion 6 from being inadvertently peeled off due to excessive pressure acting on the easily peelable seal portion 6 at the time of dropping.

  In supplying a nutrient to a patient or the like by a tube feeding method using the nutrient bag configured as described above, for example, in a type in which a tube feeding nutrient is previously filled in the bag, Carry it or hang it on a support stand. At that time, since the opening means 5 is in an unopened state, dust, bacteria, etc. do not enter the upper part of the closing means 4. In particular, in the above embodiment, the inside of the welded portion W in the peripheral portion of the bag body 1 as well as the storage chamber 10 in the bag body 1 in which the front and rear sheet materials 1a and 1b are joined by welding or the like is completely covered by the welded portion W. Since it is maintained in a sterile state, dust, bacteria, etc. do not enter.

  Even if the bag is dropped on the floor or the like, the nutrient peel in the bag does not move to the closing means 4 side because there is an easily peelable seal portion 6 below the closing means 4. In particular, in the above-described embodiment, since the force is required to peel off the sealing portion 6 from the storage chamber 10 side rather than peeling from the upper side, the bag is suspended from a support stand or the like to the floor or the like. It can be easily set so that the seal 6 does not peel off when dropped.

  Next, in the state where the nutrient bag is suspended and held on the support stand or the like as described above, the opening means 5 is used to open the upper portion of the closing means 4 as shown in FIGS. 2B and 3. The opening S is formed, the closing means 4 is opened from the opening S as shown in FIG. 2 (c), and the easily peelable seal portion 6 is provided below the closing means 4, The seal portion 6 is also peeled off and opened. Then, water or hot water is injected from the opening S to make the nutrient liquid in a liquid state and sent from the outlet plug 2 to the stomach or intestine of the subject via a tube (not shown).

  Further, for example, in the case where the tube is filled with a tube nutrient in a hospital or the like, the tube nutrient is injected from the outlet plug 2 with the bag suspended on a support stand or the like. In that case, in the said embodiment, since the said easily peelable seal | sticker part 6 exists under the said closing means 4, the nutrient in the said bag does not move to the closing means 4 side. Then, with the bag suspended from a support stand or the like as described above, a tube or the like (not shown) is connected to the outlet plug 2 and the nutrient contained in the bag is sent to the stomach or intestine of the subject.

  Next, when adding a nutrient to the bag or injecting another nutrient, water or hot water, etc., the suspension stand such as the suspension hole 3 is used to suspend and hold it. Similarly to the above, an opening S for opening operation is formed in the upper part of the closing means 4 by the opening means 5, and the closing means 4 is opened from the opening S, and easily opened below the closing means 4. When the peelable seal portion 6 is provided, the seal portion 6 is also peeled off and opened. Then, a liquid nutrient or the like to be additionally supplied from the opening S is introduced and sent from the outlet plug 2 to the stomach or intestine of the subject through a tube (not shown).

  In any of the above cases, until the opening means 5 forms the opening S for the opening operation of the closing means 4 at the upper part of the closing means 4, not only the lower side of the closing means 4 but also the upper side is outside air. It is held in a substantially completely sealed state, and when dust, bacteria, etc. enter the upper portion of the closing means 4 or accumulate gradually and open the closing means 4, the closing means 4 opens the inside of the storage chamber 10 of the bag body 1. It is possible to prevent the above-mentioned dust, bacteria, etc. from entering.

  The suspension part such as the suspension hole 3 is provided in the upper center part of the bag body 1 as shown in FIG. 1, and the recesses 7 are formed on the left and right sides of the lower part of the bag body as shown in the illustrated example. Correspondingly, it is preferable that a part of the joint 11 protrudes toward the storage chamber 10 as shown in the figure. If comprised in that way, when the nutrient bag is suspended and held on a support stand or the like by the suspending portion, the shape of the nutrient bag can be kept substantially constant without changing. As a result, it becomes possible to stably flow out the nutrient solution flowing out from the outlet plug 2 at the bottom of the bag body without fluctuation, and a scale 8 representing the capacity and remaining amount formed in the bag body 1; The error with the actual capacity and the remaining amount is reduced, and the scale display with higher accuracy is possible.

  In the above embodiment, a pair of upper and lower half cuts are provided on the back side of the sheet material 1a on the front side of the bag body 1 as the opening means 5 for forming the opening S for opening operation of the closing means 4 in the upper part of the closing means 4. The grooves 51 and 51 are formed, and the belt-like portion 50 between the half-cut grooves 51 and 51 is cut out along the half-cut grooves 51 and 51. However, they are provided on the sheet material 1b on the rear side. May be. In addition, a thin strip-shaped sheet material may be laminated on the back side of the strip-shaped portion 50 as necessary. In this case, the half-cut groove 51 is provided only in the center in the width direction of the thin strip-shaped sheet material. You may do it.

  In the above-described embodiment, the chuck seal 40 including the male and female chuck pieces 41 and 42 that are engaged with each other is used as the closing means 4. However, the present invention is not limited to this. If the material 1a, 1b is closed in an airtight / watertight manner and can be opened easily by simply forming a slit-like or small opening having a desired shape at the top, the structure of the closing means 4 can be changed as appropriate. Is possible.

  Next, specific examples of the nutrient bag according to the present invention and various tests using the same will be described.

[Example 1]
In the following, as Example 1, each of the sheet materials 1a and 1b of the bag body 1 of FIG. 1 is made of a four-layer structure of polyamide (nylon) / low density polyethylene / linear rhoden polyethylene / sealant layer. Five types of nutrient bags having different seal strengths were manufactured by varying the formation conditions of the easy-peelable seal portion 6 and subjected to drop tests using the samples as samples (1) to (5). The results are shown in Table 1 below.

  In making the above-mentioned nutrition bag, the point that the force acts particularly when opening the easily peelable seal portion 6 is created, a deformed mold is created, and the force acts particularly when heat-sealing is slightly sealed. By reducing the strength, for example, by providing a seal strength difference of 1 N or more between the longitudinal center portion and the end portion of the seal portion 6, it was devised so that the opening operation at the time of opening can be felt more easily.

  Moreover, the drop test of each said sample was carried out perpendicularly on the floor made from concrete from the position of about 180 cm in height in the environment of the temperature of 30.1 degreeC, and humidity 61% as a fall method. Further, the seal strength in the table is an average value obtained by measuring each prototype seal portion 6 with a width of 15 mm using an IMADA force gauge and measuring it five times. In addition, the state of the seal part 6 after dropping was ○ when the seal part 6 was not peeled off or whitened, △ when it was not peeled but partially whitened, and ▲ when it was whitened to about half. The thing was made into x.

  As is clear from Table 1 above, when the seal strength of the easily peelable seal portion 6, especially the force necessary for peeling from the lower portion (the storage chamber 10 side) is 6 N or more, the nutrient bag is normally suspended. Even if it is dropped from a height position (about 180cm) such as a stand, the seal part 6 does not peel off, and the force necessary for peeling from the upper side is set to 2 to 5 N, and it is necessary for peeling from the lower part. If the difference between the required force and the force necessary for peeling from the upper side is 4N or more, it is possible to easily peel from the upper part and to prevent peeling of the seal portion 6 due to dropping. I understand.

[Example 2]
As a test for confirming the remaining scale accuracy of a nutrient bag made with the same composition as described above, a discharge rate rate test was performed, and a bag filled with a prescribed amount (eg, filling amount 610 mL, air amount 60 mL) was used. The infusion set was pierced, the drop from the plug part to the intravenous injection needle (21 to 23G injection needle) was set to 76 cm, and the discharge time was measured every 20 mL when the clamp was fully opened. The result is shown in FIG.

A to F in FIG. 4 are the same configurations as in FIG. 1 and are measured by measuring the discharge time by storing water and a small amount of air in three types of nutrient bags having different capacities. The procedure and the filling amount of water and air are as follows. As the composition of the bag, a composition having a thickness of 260 μm and a composition 2 having a thickness of 360 μm were used. The composition 2 has higher oxygen permeability and water vapor permeability than the composition 1. Moreover, the sheet composition for tube feeding nutrient bags prepared with a higher density composition is used.
A has a capacity of 200 mL and a bag of composition 1 is filled with 206 mL of water and an amount of air of 40 cc.
B has a capacity of 400 mL and is filled with 408 mL of water and 50 cc of air in a bag of composition 1.
C has a capacity of 400 mL and a bag of composition 2 is filled with 408 mL of water and an amount of air of 50 cc.
D is a capacity of 600 mL and a bag of composition 2 is filled with 408 mL of water and an amount of air of 50 cc.
E has a capacity of 600 mL and a bag of composition 1 is filled with 610 mL of water and an amount of air of 60 cc.
F has a capacity of 600 mL and a bag of composition 2 filled with 610 mL of water and 60 cc of air.

  The discharge rate rate in FIG. 4 is expressed as a ratio (%) to the discharge time for each 20 mL, where 100 is the discharge time of 20 mL immediately after the start of discharge. If said discharge rate rate is 80% or more, there will be little fluctuation | variation of discharge speed and there will be no trouble in supply of a nutrient. Moreover, it can be said that the accuracy with respect to the scale specified on the bag portion by printing or sticking is high.

  By using a sheet composition having the characteristics as described above and a shape as shown in FIG. 1, particularly a bag shape having the concave portion 7, it is clearly indicated on the outside of the bag by printing or sealing. It is possible to increase the accuracy of the internal capacity for a certain scale display.

  As described above, according to the present invention, by providing the opening means for forming the opening for opening operation of the closing means between the hanging part of the upper portion of the bag body of the nutrient bag, Prevents the entry of dust, bacteria, etc. with the top of the closing means sealed, and opens the closing means by forming an opening at the top of the closing means only when the closing means is opened. This makes it possible to reduce the entry of dust, bacteria, and the like into the medicine bag as much as possible. Hygiene management of this type of nutrient bag is facilitated and the reliability is improved. As a result, it is possible to increase the mode of use and the degree of freedom of selection and the industrial applicability of this type of nutrient bag.

The front view which shows one Embodiment of the nutrient bag by this invention. (A) is an AA expanded sectional view in FIG. 1, (b) is the same figure of the state which opened the opening means, (c) is the same figure of the state which opens the closing means. The front view of a part of nutrient solution bag of the state which opened the opening means. The graph which shows the relationship between the discharge amount of the bag in an Example, and the discharge rate rate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag main body 1a, 1b Sheet material 10 Accommodating chamber 11 Joint part 2 Exit plug body 3 Hanging hole 4 Closing means 40 Chuck seal 41, 42 Chuck piece 5 Unsealing means 50 Band-shaped part 50a Notch part 51 Half cut groove 6 Easy peelability Seal part 7 Concave part 8 Scale

Claims (6)

  A suspending part for suspending the bag body is provided at the upper part of the bag body having a nutrient storage chamber therein, and a closing means such as a chuck seal is provided at the upper part of the storage chamber. A nutrient solution bag provided with an opening means for forming an opening for opening the closing means between the lowering portion and the lowering portion.   The bag body is provided with a nutrient chamber inside by joining the peripheral edges of a pair of front and rear sheet materials by welding or the like, and the opening means breaks a part of one sheet material of the bag body. The nutrient bag according to claim 1, wherein the nutrient bag is configured to form the opening.   The nutrient bag according to claim 1 or 2, wherein an easily peelable seal portion is provided along the closing means in an upper part of the storage chamber below the closing means.   The nutrient bag according to claim 3, wherein the easy-peelable seal portion is configured to be easily peeled off from the upper side of the bag body rather than from the housing chamber side of the bag body. .   The nutrient bag according to claim 4, wherein a difference in peel strength between the case where the easy peelable seal part is peeled from the inside of the bag body and the case where the peelable part is peeled from the upper side of the bag body is 4N or more. .   The nutrient bag according to any one of claims 2 to 5, wherein a peel strength at a central portion in the longitudinal direction of the easily peelable seal portion is made 1N or less smaller than a seal strength at both ends.

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