JP2009153703A - Heat producing bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat producing bag efficiently heating liquid to a predetermined temperature by meandering a part of a tube in which liquid such as infusion circulates and heating the meandering portion from the side face in a flat-shaped heat producing bag formed by storing a heat producing composition producing heat by a contact with oxygen in air, in an air permeable bag. <P>SOLUTION: (1) This heat producing bag is provided with a piercing section, a notched section, a projecting section or a cylindrical member to the circumferential section of the flat-shaped heat producing bag. (2) This heat producing bag is provided with fitting sections, when being folded in two, fitted to each other at least at one positions of the circumference part of the bag coming into contact with each other, or (3) this heat producing bag has a sheet-like heat insulating material, and fitting parts fitted to each other, when the heat insulating material is superposed on the bag, at least at one positions of the circumferential parts of the bag and the heat insulating material coming into contact with each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a flat exothermic bag in which a heat generating composition that generates heat upon contact with oxygen in the air is housed in a breathable bag, and more specifically, holds a tube through which a liquid such as an infusion solution circulates. The present invention relates to a heat generating bag for efficiently heating a liquid.

Conventionally, when an infusion is infused into a patient, a treatment for warming the infusion to a temperature close to body temperature has been performed in order to alleviate the patient's pain. The infusion solution is usually stored at a temperature of 10 ° C. or less, and it takes time and labor to warm the infusion solution filled in the infusion bag or the like, and it is necessary to maintain a preferable range of temperature during the infusion. Therefore, in an infusion tube that connects between an infusion bag and an injection needle, an infusion heating as described in Patent Document 1 that forms a meandering circulation portion of the infusion solution, heats the meandering portion from the side surface, and warms the infusion solution. Tools have been developed.
Japanese Utility Model Publication No. 53-139798

As a heating means used for the infusion heating device as described above, for example, a heat storage material using heat released when the liquid becomes solid, or heat generated by a reaction between a metal such as iron and oxygen in the air. The exothermic composition used can be considered.
However, when a heat storage material is used, it is necessary to heat the heat storage material in advance, which takes time and effort, and for example, there are cases where it cannot be used because there is no electrical equipment outside the hospital. In addition, exothermic compositions that generate heat upon contact with oxygen in the air are widely used in disposable warmers, etc., but are difficult to warm when the ambient temperature is low, and conversely when the ambient temperature is high Tends to be too high, and there is a disadvantage that temperature control is difficult.

  Therefore, the problem to be solved by the present invention is a heating means for meandering a part of a tube through which a liquid such as infusion flows as described above, heating the meandering part from the side, and warming the liquid. An object of the present invention is to provide a heating means for efficiently heating a liquid to a predetermined temperature.

  As a result of intensive studies to solve these problems, the present inventors have found that a flat exothermic bag in which a heat generating composition that generates heat upon contact with oxygen in the air is contained in a breathable bag is flat. The tube can be tightly held on the flat heat-generating bag by providing a penetrating part, a notch, a convex part, or a cylindrical member in the periphery of the heat-generating bag and passing the tube so that it is folded back at these set points. At the same time, the number of turns was adjusted and the length of the tube in contact with the heat generating bag was adjusted to find that the liquid could be efficiently heated to a predetermined temperature, and the heat generating bag according to the first embodiment of the present invention was reached.

  Further, in the heating bag comprising a flat heating bag in which a heating composition that generates heat upon contact with oxygen in the air is housed in a breathable bag or a sheet-like heat insulating material, the heating bag is replaced with two heating bags. When folded, or when the heat-generating bag and the heat insulating material are overlapped, a fitting portion that fits each other is provided at at least a part of the peripheral portion that contacts each other, and the heat-generating bag or the like is configured as described above. The tube can be held in close contact with the flat heating bag by adjusting the length of the tube in contact with the heating bag by adjusting the number of times of folding. It has been found that the liquid can be efficiently heated to a predetermined temperature, and has reached the heating bag of the second embodiment and the heating bag of the third embodiment of the present invention.

That is, the present invention provides a flat heat generating bag in which a heat generating composition that generates heat upon contact with oxygen in the air is housed in a breathable bag, and penetrates the peripheral portion of the flat heat generating bag. It is a heat generating bag characterized by providing a part, a notch part, a convex part, or a cylindrical member.
Further, the present invention is a flat heating bag in which the heat generating composition that generates heat upon contact with oxygen in the air is housed in a breathable bag, and when the bag is folded in half, it contacts each other The heat generating bag is characterized in that a fitting portion for fitting with each other is provided at at least a part of the peripheral portion of the bag.
The present invention also relates to a flat heating bag comprising a sheet-like heat insulating material, wherein a heat generating composition that generates heat upon contact with oxygen in the air is housed in a breathable bag, When the heat insulating material and the heat insulating material are overlapped, a heat generating bag is provided, wherein at least a part of the peripheral portion of the bag and the heat insulating material that are in contact with each other is provided with a fitting portion that fits each other. is there.

  In the heat generating bag of the present invention, the tube can be folded at the through portion, the notch portion, the convex portion, the cylindrical member, or the fitting portion provided in the peripheral portion of the bag, so that a tube through which a liquid such as an infusion solution circulates Can be held in close contact with the heat generating bag so as to form a meandering shape, and it is possible to efficiently heat a liquid such as an infusion solution. In addition, the length of the tube that comes into contact with the heating bag can be adjusted by adjusting the number of times the tube is folded, for example, by using all of the above-mentioned portions that can be folded or using every other portion. It is possible to easily control the temperature of the liquid.

The exothermic bag of the present invention is applied to an exothermic bag for heating a liquid such as an infusion using an exothermic composition that generates heat upon contact with oxygen in the air.
Hereinafter, although the exothermic bag of this invention is demonstrated in detail based on FIGS. 1-11, this invention is not limited by these. In addition, FIG. 1 is sectional drawing which shows the example of the heat generating bag of this invention. 2 to 5 are perspective views (partially cutaway perspective views) showing an example of a heat generating bag according to the first embodiment of the present invention. FIG. 6 is a perspective view showing an example of a heat generating bag according to the second embodiment of the present invention. FIG. 7 is a perspective view showing an example of a heat generating bag according to the third embodiment of the present invention. FIG. 8 is a cross-sectional view showing an example of the heat generating bag of the present invention other than FIG. 9 to 11 are perspective views showing examples of use of the heat generating bag of the present invention.

As shown in FIG. 1, the heat generating bag according to the first embodiment of the present invention is a flat structure in which a heat generating composition 1 that generates heat upon contact with oxygen in air is housed in a bag having a breathable packaging material 2. 2, a through portion 5 as shown in FIG. 2, a notch portion 6 as shown in FIG. 3, and a peripheral portion of the flat heat generating bag (usually a bonding portion 4 for packaging material). 4 is a heating bag provided with a convex portion 7 as shown in FIG. 4 or a cylindrical member 8 as shown in FIG.
In addition, as a structure of a flat heating bag, the air-permeable packaging material 2 can be used on both sides, or one side can be the air-permeable packaging material 2 and the other side can be the air-impermeable packaging material 3. .

  In the heat generating bag according to the first aspect of the present invention, when a penetrating portion or a cutout portion is provided in the peripheral portion of the bag, these shapes are usually circular or semicircular in order to pass a tube through which a liquid such as an infusion solution flows. In general, the diameter is about 0.2 to 1.5 cm, preferably about 0.3 to 1 cm. However, without being limited thereto, for example, a triangle, a square, a rectangle, a trapezoid, a polygon, an ellipse, or the like may be used. When the shape is other than circular or semicircular, it has an area corresponding to a circular or semicircular shape having a diameter of about 0.2 to 1.5 cm, preferably about 0.3 to 1 cm.

  In the heat generating bag according to the first aspect of the present invention, when the convex portion is provided in the peripheral portion of the bag, the tube is inverted by 180 ° at the convex portion. The shape of the convex portion is usually a cylindrical shape, a semi-cylindrical shape, a prismatic shape, etc., but is not limited to this as long as the tube can be folded back (inverted 180 degrees). The shape may be inverted up and down, “T” shape, or the like. Moreover, the height is about 0.1-1 cm normally, Preferably it is about 0.2-0.6 cm. The gap between the convex portions is usually about 0.2 to 5 cm, preferably about 0.3 to 3 cm. In addition, an adhesive part is provided at the tip of the convex part, and for example, using two such heat-generating bags, the overlapping convex parts are bonded together so that the surfaces having the convex parts are inside, and the tube is attached. It can be used in a meandering manner.

  In the heat-generating bag of the first aspect of the present invention, when a cylindrical member is provided in the periphery of the bag, the cylindrical member is usually cylindrical or semi-cylindrical because it passes a tube through which liquid such as infusion flows. The inner diameter of the cross section is about 0.2 to 1.5 cm, preferably about 0.3 to 1 cm. However, without being limited thereto, for example, a cylindrical member having a cross section such as a triangle, a square, a rectangle, a trapezoid, and an ellipse may be used. When the shape is other than the cylindrical or semi-cylindrical shape, the size of the internal space has an area corresponding to these as described above.

  In the present invention, in order to heat the meandering tube from both side surfaces, as shown in FIG. 8, the heat generating composition storage portion can be divided into two and can be easily folded in two. When such a heat generating bag is used, the laminating portion 4 formed in the central portion of the heat generating bag is folded in two, and the liquid flowing through the tube is heated by sandwiching the tube. Also, two heat-generating bags of the first form of the present invention, one heat-generating bag of the first form of the present invention and one other heat-generating bag, or one heat-generating bag of the first form of the present invention and heat insulation. Using a material, a meandering tube can be sandwiched from both sides, and the liquid flowing through the inside can be heated.

As shown in FIGS. 1 and 8, the heat generating bag according to the second embodiment of the present invention contains a heat generating composition 1 that generates heat upon contact with oxygen in the air and is housed in a bag having a breathable packaging material 2. 6 is a flat heating bag, and when the heating bag is folded in half by a line 11, as shown in FIG. 6, at least a part of the peripheral portion of the bag (a bonding portion of the packaging material) that contacts each other It is the heat generating bag in which the fitting parts 9 and 10 which mutually fit are provided in the position.
Further, the heat generating bag of the third embodiment of the present invention is a heat generating bag in which a flat heat generating bag as shown in FIG. 1 is combined with a sheet-like heat insulating material. As shown in FIG. When the heat insulating material 13 and the heat insulating material 13 are overlapped with each other, the heat generating bag is provided with fitting portions 9 and 10 that are fitted to each other at positions of at least a part of the peripheral portion of the bag and the heat insulating material. .
In addition, as the configuration of each flat heating bag, as with the heating bag of the first embodiment, both sides are made to be breathable, or one side is made breathable and the other side is made non-breathable. it can.

  The fitting part in the heat generating bag of the second or third form of the present invention combines the heat generating bags or the heat generating bag and the heat insulating material, and forms a gap around the fitting part so that liquid such as infusion can be received. The circulation tube can be folded. As for the fitting part in this invention, one has the protrusion 9, and the other one has the dent or penetration part 10 corresponding to this (a male and female hook (round shape clasp), a button, etc.), Alternatively, Velcro (registered trademark) or the like is used. The shape of the fitting portion is not particularly limited, but usually the appearance is a cylindrical shape, a prismatic shape, etc., and the height is usually about 0.1 to 1 cm, preferably 0.2 to It is about 0.6 cm. Also, the material is not particularly limited, but usually synthetic resin, metal or the like is used. The gap between the fitting portion and the fitting portion is usually about 0.2 to 5 cm, preferably about 0.3 to 3 cm. The fitting portion may be configured to be unable to be separated once coupled, but is preferably configured to be detachable with one touch.

In the heat generating bag according to the second embodiment of the present invention, it is preferable to arrange the fitting portion so that, for example, all the protrusions 9 and the recesses 10 are replaced when the heat generating bag is rotated 180 degrees. With such a configuration, when two heat-generating bags of the second form are used, the protrusion 9 and the recess 10 of the fitting portion engage with each other so that the surfaces having the fitting portion are inside each other. As described above, the tubes can be overlapped and joined, and the tube can be passed through the gap between the two heat-generating bags in a meandering manner.
Moreover, the sheet-like heat insulating material used in the heat generating bag according to the third embodiment of the present invention is usually in the same shape and size as the flat heat generating bag. The thickness is usually about 0.1 to 1 cm. As the material, foamed resin such as polyurethane resin, various rubbers and the like are used.

  As a raw material of the packaging material for the flat heating bag used in the present invention, a laminated sheet containing a plastic film is usually used. Examples of these laminated sheets include (1) heat fusion Component layer / plastic film, (2) (mixed film of heat fusible component and plastic component) / plastic film, (3) heat fusible component layer / plastic film / heat fusible component layer / nonwoven fabric, ( 4) (Laminated film of heat-fusible component and plastic component) / bonded sheet made of non-woven fabric. In addition, as a plastic film, a polyethylene film, a polypropylene film, a polyester film, a nylon film, etc. can be illustrated.

  The breathable packaging material used in the present invention is usually one in which a vent hole such as a needle hole is provided in the above-mentioned laminated sheet or the like. There are no particular restrictions on the arrangement position and size of the vents, and for example, the vents or sizes that are the same in size and shape on the entire surface, center, periphery, or part of the laminated sheet, for example. A plurality of types of vents with different sheath shapes can be formed, but the same size and shape of vents can be provided on the entire surface of the laminated sheet because the temperature can be easily controlled by the number of tube folds. It is preferable to form at intervals.

  In the heat generating bag of the present invention, an adhesive part for further tightly holding the tube can be provided on the surface of one side of the flat bag. There are no particular restrictions on the position and size of the pressure-sensitive adhesive part, for example, the pressure-sensitive adhesive part having the same size and shape on the entire surface, central part, peripheral part, or part of the packaging material, or A plurality of types of pressure-sensitive adhesive parts having different sizes and shapes can be formed, but it is preferable to form pressure-sensitive adhesive parts having the same size and shape on the entire surface of the packaging material at equal intervals. The ratio of the area with respect to the whole packaging material of the single side | surface of an adhesive part is 2-50% normally, Preferably it is 5-20%.

However, when the exothermic bag of the present invention is used for warming an infusion solution, in order to exhibit preferable exothermic characteristics, the total water vapor permeability according to the JISK7129A method on one side and the other one side as a packaging material. but, 500~1200g ^/ m 2 · 24hr, preferably chosen such that 600~1000g ^/ m 2 · 24hr. For example, when a non-breathable packaging material is used on one side, the water vapor permeability of the other one side is 500 to 1200 g / m ² · 24 hr, and the same packaging material is used on both sides. The water vapor permeability of the packaging material is 250 to 600 g / m ² · 24 hr.

  In the heat-generating bag of the present invention, when a packaging material having a water vapor permeability in the above range is used, the infusion solution is in the vicinity of body temperature as a heat-generating characteristic when used for heating the infusion solution in an atmosphere at room temperature (20 ° C.). Within 3 minutes (time after contacting the exothermic composition with oxygen in the air), and 1 to 4 hours to keep the infusion at a temperature around body temperature. (Time required for infusion of the infusion solution) can be easily achieved. If the water vapor transmission rate is set to be smaller than the above range, the initial temperature rise (rise) may be delayed or may not reach a temperature around the body temperature, and the water vapor transmission rate may be larger than the above range. When set, the initial temperature rise (rise) is accelerated, but the temperature holding time around the body temperature is shortened.

  When the exothermic bag of the present invention is used, for example, for warming an infusion solution, it is necessary to accurately control the temperature of the infusion solution taken out through the exothermic bag. The exothermic bag of the present invention can adjust the number of times the tube is folded and the length of the tube in contact with the exothermic bag. However, the exothermic characteristics of the exothermic bag are affected by the ambient temperature, and the temperature of the infusion is the flow rate. Affected by. For this reason, in the heat generating bag of the present invention, an indication of the number of times the tube is folded on the surface of the flat heat generating bag according to the ambient temperature and / or the liquid flow rate for the liquid to reach a predetermined temperature. It can also be displayed. As a display method, in addition to the description by characters, the area to be folded can be displayed in a band-like color.

In the exothermic bag for infusion of the present invention, a mixture of an oxidizable metal, activated carbon, an inorganic electrolyte, water, and a polymer water retention agent is used as the exothermic composition that generates heat upon contact with oxygen in the air. .
Examples of the oxidizable metal powder include iron powder and aluminum powder, but iron powder is usually used, and reduced iron powder, atomized iron powder, electrolytic iron powder, and the like are used. Activated carbon is used as a water retention agent in addition to a reaction aid, and usually coconut shell charcoal, wood dust charcoal, peat charcoal and the like are used. As the inorganic electrolyte, alkali metal, alkaline earth metal, heavy metal chloride, alkali metal sulfate and the like are preferable, for example, sodium chloride, potassium chloride, calcium chloride, magnesium chloride, ferric chloride, sodium sulfate and the like. Is used. The ratios of these normal components are 20-80 wt% for oxidizable metals, 1-20 wt% for activated carbon, 1-20 wt% for inorganic electrolyte, 5-50 wt% for water, and 1-20 wt% for water retention agent. It is.

The heat generating bag of the present invention has, for example, two breathable packaging materials, or a breathable packaging material and a non-breathable packaging material, which are overlapped so that the heat-sealing surfaces are inside, and the periphery is heated. It is fused and formed into a bag shape, filled with the above-mentioned exothermic composition, and further, a penetrating part, a notch part, a convex part, a cylindrical member, or a fit, on the peripheral part of the bag (the bonding part of the packaging material) Manufactured by providing joints. The peripheral part of the heating bag is usually soft, so it has a shape such as a penetrating part, a notch part, etc., or is reinforced with a formwork made of resin, metal, etc. that is thin enough not to affect these shapes. Can do. The size of the heat generating bag of the present invention is usually about the same size as a business card, and is about 3 in the Japanese Industrial Standards A row. The shape is usually rectangular, but may be circular, elliptical, polygonal, or the like.
The exothermic bag of the present invention is further sealed with a non-breathable flat bag in order to shut off from outside air and prevent water from evaporating and diffusing outside during the period until it is used. In use, the exothermic composition in the exothermic bag comes into contact with oxygen in the air to generate heat by taking it out from the non-breathable flat bag.

  When the heating bag according to the first embodiment of the present invention is used for heating an infusion fluid or the like circulating in the tube, for example, as shown in FIG. 9 or FIG. The tube 14 is passed through 8 and folded by a predetermined number of times, the length of the tube in contact with the heat generating bag is adjusted, and infusion or the like is circulated through the tube. Moreover, about the heat generating bag of the 2nd form, as shown in FIG. 11, for example, it passes through the tube 14 of predetermined length so that the fitting parts 9 and 10 of the heat generating bag 12 may become a turning point, and heat is generated. After the bag 12 is folded in half and the tube is sandwiched, infusion or the like is circulated through the tube. In addition, for the heat generating bag of the third form, similarly, a tube having a predetermined length is passed so that the fitting portion of the heat generating bag serves as a turning point, and a sheet-like heat insulating material is overlapped to sandwich the tube. After that, it is performed by circulating the infusion or the like through the tube.

  EXAMPLES Next, although an Example demonstrates this invention concretely, this invention is not limited by these.

(Production of fever bag)
A breathable packaging material was produced by uniformly providing a large number of needle holes in a bonded packaging material made of a commercially available polyethylene film and nylon film. This breathable packaging material had a water vapor permeability of 600 g / m ² · 24 hr according to the JIS K7129A method.
Moreover, the adhesive part uniformly disperse | distributed was provided in the nylon film side of the said bonding packaging material. This packaging material had reduced air permeability due to the pressure-sensitive adhesive part, and had a water vapor permeability of 300 g / m ² · 24 hr according to the JISK7129A method.

  Also, in a nitrogen gas atmosphere, an exothermic composition is prepared by mixing so that iron powder is 62 wt%, activated carbon is 8 wt%, sodium chloride (inorganic electrolyte) is 2 wt%, water is 20 wt%, and water retention agent is 8 wt%. did. The two kinds of breathable packaging materials are cut into 100 mm × 150 mm, and each one is overlapped so that the heat-sealing surfaces are inside, and the periphery is heat-fused to form a bag shape. The exothermic bag as shown in FIG. 1 (1) was manufactured by filling 45 g of the exothermic composition. Furthermore, a total of 10 circular through portions (inner diameter: 5 mm) as shown in FIG. Thereafter, the heating bag was sealed in a 120 mm × 180 mm non-breathable flat bag.

(Infusion warming test)
In the production of the heat-generating bag, a heat-generating bag was produced in the same manner as described above except that no through portion was provided, and was similarly sealed in a non-breathable flat bag.
A heat generating bag provided with a penetrating part and a heat generating bag not provided with a penetrating part were left overnight in a room at 20 ° C. Next, these heat generation bags are taken out from the non-breathable flat bag in a room at 20 ° C., and an infusion tube is passed through the heat generation bag provided with the penetrating portion as shown in FIG. It was piled up and fixed to the side so that an infusion tube might be pinched. Five minutes after taking out the heating bag from the non-breathable flat bag, the infusion solution was passed through the infusion tube at a flow rate of 3 cc / min from the infusion bag at a flow rate of 20 ° C. and passed through the infusion tube sandwiched between the exothermic bags. The temperature of the infusion solution was measured about every 5 minutes. As a result, an infusion solution at 30 to 32 ° C. was obtained over 2 hours.

(Production of fever bag)
In the production of the heat generating bag of Example 1, a rectangular column as shown in FIG. 4 (vertical 5 mm, horizontal 5 mm, height, as in Example 1 except that a convex portion was provided instead of the penetrating portion. A heating bag having a total of 10 3 mm) was produced. Next, the adhesive part was provided in the surface of the front-end | tip of all the convex parts, and the release paper was bonded together. Thereafter, the heating bag was sealed in a 120 mm × 180 mm non-breathable flat bag.

(Infusion warming test)
In the room at 20 ° C., the two exothermic bags were left for one day. Next, these heat-generating bags are taken out from the non-breathable flat bag in a room at 20 ° C., and the release paper is peeled off and overlapped so that the surfaces having the convex portions are inside each other. While bonding the surfaces, the tube was passed in a meandering manner so as to be folded back at the convex portion. Five minutes after taking out the heating bag from the non-breathable flat bag, the infusion solution was passed through the infusion tube at a flow rate of 3 cc / min from the infusion bag at a flow rate of 20 ° C. and passed through the infusion tube sandwiched between the exothermic bags. The temperature of the infusion solution was measured about every 5 minutes. As a result, an infusion solution at 30 to 32 ° C. was obtained over 2 hours.

(Production of fever bag)
The two types of breathable packaging materials in Example 1 were cut into 200 mm × 150 mm, and each one was overlapped so that the heat-sealing surfaces were inside each other, and the peripheral and central bisectors were heated. While fusing and shape | molding in a bag shape, 90 g of exothermic compositions were filled, and the exothermic bag as shown in FIG. 8 was manufactured. In addition, a mating portion made of circular male and female hooks (outer diameter 5 mm) as shown in FIG. 6 is added to the heating bag laminating portion, 10 points each on the long side and 4 points on the short side. 28 places were provided. Thereafter, the heating bag was sealed in a 240 mm × 180 mm non-breathable flat bag.

(Infusion warming test)
The exothermic bag was left for one day in the room at 20 ° C. Next, the heating bag is taken out from the non-breathable flat bag in a room at 20 ° C., and the heating bag is folded in half at the center as shown in FIG. The tube was passed in a meandering manner so that it would be folded back. Five minutes after taking out the heating bag from the non-breathable flat bag, the infusion solution was passed through the infusion tube at a flow rate of 3 cc / min from the infusion bag at a flow rate of 20 ° C. and passed through the infusion tube sandwiched between the exothermic bags. The temperature of the infusion solution was measured about every 5 minutes. As a result, an infusion solution at 30 to 32 ° C. was obtained over 2 hours.

(Production of fever bag)
In the production of the heat generating bag of the first embodiment, heat generation as shown in FIG. 6 is performed in the same manner as in the first embodiment except that a fitting portion made of a circular male and female hook (outer diameter 5 mm) is provided instead of the through portion. I made a bag. A total of 16 circular male and female hooks were provided, six on the long side and two on the short side. Moreover, when the heating bag was rotated 180 degrees, the male and female hooks were all replaced. Thereafter, the heating bag was sealed in a 120 mm × 180 mm non-breathable flat bag.

(Infusion warming test)
In the room at 20 ° C., the two exothermic bags were left for one day. Next, these heating bags are taken out from the non-breathable flat bag in a room at 20 ° C., one heating bag is rotated 180 degrees, and the male and female hooks of the two heating bags are joined together. The tube was passed in a meandering manner so that it would be folded back. Five minutes after taking out the heating bag from the non-breathable flat bag, the infusion solution was passed through the infusion tube at a flow rate of 3 cc / min from the infusion bag at a flow rate of 20 ° C. and passed through the infusion tube sandwiched between the exothermic bags. The temperature of the infusion solution was measured about every 5 minutes. As a result, an infusion solution at 31 to 33 ° C. was obtained over 2 hours.

(Production of fever bag)
A heating bag similar to that in Example 4 was produced. In addition, a hook that fits to the position of the hook of the heat generating bag is fitted to the heat insulating material made of a sheet-like polyurethane foam resin having the same size (thickness 3 mm) as the heat generating bag at the periphery of the long side. A total of 16 locations were provided, each 6 locations, 2 each in the periphery of the short side. Thereafter, the heat generating bag and the heat insulating material were sealed in a 120 mm × 180 mm non-breathable flat bag.

(Infusion warming test)
The exothermic bag and the heat insulating material were left in a room at 20 ° C. for one day and night. Next, the heat generating bag and the heat insulating material are taken out from the non-breathable flat bag in a room at 20 ° C., and the male and female hooks of the heat generating bag and the heat insulating material are combined with each other, and the tube is passed in a meandering manner so that the hook is folded back. did. Five minutes after removing the heat generating bag from the non-breathable flat bag, the infusion solution is circulated from the infusion bag to the infusion tube at a flow rate of 2.2 cc / min at 20 ° C. and sandwiched between the heat generating bag and the heat insulating material. The temperature of the infusion that passed through the infusion tube was measured about every 5 minutes. As a result, an infusion solution at 30 to 32 ° C. was obtained over 2 hours.

  As mentioned above, it became clear that the exothermic bag of the Example of this invention can heat an infusion efficiently to predetermined temperature.

Sectional drawing which shows the example of the exothermic bag of this invention The perspective view which shows an example of the heat generating bag of the 1st form of this invention (partially cutaway perspective view) The perspective view which shows an example of the heat generating bag of 1st forms other than FIG. 2 of this invention (partially notched perspective view) The perspective view (partially cutaway perspective view) showing an example of the heat generating bag of the first embodiment other than FIGS. 2 and 3 of the present invention The perspective view (partially cutaway perspective view) showing an example of the heat-generating bag of the first embodiment other than FIGS. The perspective view which shows an example of the heating bag of the 2nd form of this invention The perspective view which shows an example of the heat generating bag of the 3rd form of this invention Sectional drawing which shows an example of the heat generating bag of this invention other than FIG. The perspective view which shows the usage example of the heat generating bag of this invention The perspective view which shows the usage example of exothermic bags other than FIG. 9 of this invention. The perspective view which shows the usage example of exothermic bags other than FIG. 9, FIG. 10 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exothermic composition 2 Breathable packaging material 3 Non-breathable packaging material 4 Bonding part of packaging material 5 Penetration part 6 Notch part 7 Convex part 8 Cylindrical member 9 Fitting part (protrusion)
10 Fitting part (dent or penetration)
11 Folded line 12 Heat generation bag 13 Sheet-like heat insulating material 14 Tube

Claims (11)

  A heat generating composition that generates heat upon contact with oxygen in the air is a flat heat generating bag housed in a breathable bag, and a perforation portion, a notch portion, a peripheral portion of the flat heat generating bag, A heating bag, characterized in that a convex part or a cylindrical member is provided.   A heat generating composition that generates heat upon contact with oxygen in the air is a flat heat generating bag housed in a breathable bag, and when the bag is folded in two, the peripheral portions of the bag that are in contact with each other A heating bag characterized in that a fitting portion for fitting with each other is provided at at least a part of the position.   A heat generating composition that generates heat upon contact with oxygen in the air is housed in a breathable bag, and is a flat heat generating bag provided with a sheet-like heat insulating material, wherein the bag and the heat insulating material are stacked. An exothermic bag characterized by being provided with a fitting portion for fitting to each other at a position of at least a part of the peripheral portion of the bag and the heat insulating material that come into contact with each other.   The heat generating bag according to claim 1, wherein the penetrating part, the notch part, the convex part, or the cylindrical member is for holding and folding the tube through which the liquid flows in the flat heat generating bag.   The heat generating bag according to claim 4, wherein a guide for the number of times the tube is folded according to the ambient temperature and / or the flow rate of the liquid for the liquid to reach a predetermined temperature is displayed on the surface of the flat heat generating bag. .   The heat generating bag according to claim 2 or 3, wherein the fitting portion is for holding the tube through which the liquid flows in a flat heat generating bag and turning it back.   The heat generating bag according to claim 6, wherein a guide for the number of times the tube is folded is displayed on the surface of the flat heat generating bag in accordance with the ambient temperature and / or the flow rate of the liquid so that the liquid reaches a predetermined temperature. .   The heat-generating bag according to claim 1 or 2, wherein the storage portion for the heat-generating composition is divided into two parts.   The heat generating bag according to any one of claims 1 to 3, wherein the heat generating bag has a plurality of adhesive portions dispersed on one surface of the flat heat generating bag.   The heat generating bag according to claim 9, wherein the ratio of the area of one side of the adhesive part to the entire packaging material is 2 to 50%.   The heat generating bag according to any one of claims 1 to 3, wherein the flat heat generating bag is further sealed in a non-breathable flat bag.

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