JP3078210B2 - Sterilization bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sterilization bag for medical use, and more particularly to a sterilization bag for inserting forceps, tweezers, scissors, and the like to sterilize them.

[0002]

2. Description of the Related Art In the medical field, forceps, tweezers,
Scissors and the like (hereinafter, collectively referred to as forceps) are subjected to sterilization and then used for medical treatment and surgery of patients. As a typical sterilization method, a method is known in which forceps are housed in a sterilization bag, sealed, charged in an autoclave, and sterilized by high-pressure steam. This will be described in detail below.

FIG. 7 is a view showing a state in which forceps 4 are put in a sterilization bag 6 of this kind. The sterilization bag 6 is composed of two sheets, and the front side sheet is the synthetic resin film 1,
The back sheet is a sheet 2 made of paper, and both sheets 1 and 2 are heel-sheeted by a seal portion 3. Before the forceps 4 are stored, the opening 8a at the top of the sheet is not heat-sealed and is open.

In using the sterilization bag, about three forceps 4 are inserted through the opening 8a of the sterilization bag 6,
The opening 8a is heat-sealed. The seal portion becomes the upper seal portion 8. After that, it was charged into an autoclave and 121
Sterilize for 20 minutes at 2 ° C and 2 ° C. When using forceps in medical treatment or the like, the upper part of the sterilization bag 6 is cut open and the forceps 4 in the inside are used.

[0005] As another method of sterilizing forceps, there is a method of sterilizing the forceps by setting them on a forceps stand. In this sterilization method, as shown in FIG. 8, the forceps 4 are erected on a forceps stand 5, a non-woven bag 9 is covered so as to cover the forceps 4, and the end of the bag 9 is tied with a string 9a and stopped. And sterilization by high-pressure steam in the same manner as described above. The end of the bag 9 may be stopped by a tape. When using the forceps 4, the bag 9 is removed, and the forceps 4 are used in a state where the forceps 4 are erected on the forceps stand 5 as shown by the solid line in FIG.

[0006] In addition to the above-mentioned high-pressure steam sterilization method, a gas sterilization method is often used as a sterilization method. Gas sterilization
An object to be sterilized is placed in a gas sterilizer, for example, 300 to 10
Ethylene oxide gas at a concentration of 00 mg / l and a temperature of 40
Sterilization is performed by exposing at ６０60 ° C. and 30-60% RH for 2-18 hours.

Although the sterilization bag 6 is composed of two sheets, a synthetic resin film and a paper sheet, there is also a single sheet composed of paper, a synthetic resin film or a nonwoven fabric. The bag 9 may be made of paper.

[0008]

However, since the conventional sterilization bag has no thickness, one sterilization bag can accommodate only one or at most several pieces, and many forceps are used. When necessary, many sterilization bags must be opened and taken out, which is troublesome,
There was a problem that it would hinder rapid treatment and surgery. In addition, with conventional sterilization bags, when loading into the autoclave, it is laid out horizontally or placed sideways on the bottom with the side edge as the bottom, which takes up extra space There was a problem.

[0009] On the other hand, the method of sterilizing the forceps by standing the forceps stand is advantageous in that when a large number of forceps are used at one time, it is advantageous to save the trouble of opening each bag individually. Or because it is a configuration that stops with a string,
Lack of hermeticity could cause germs and the like to enter inside after sterilization. Further, the forceps stand is bulky and has a problem that it occupies a large space in an autoclave or a storage place after a sterilization treatment.

[0010] The present invention has been made in view of the above-mentioned conventional problems, and can be reliably sealed, can store many forceps in one bag, and can be used in an autoclave or the like during sterilization. An object of the present invention is to provide a sterilization bag which does not take up space in a storage place.

[0011]

According to the present invention, a first rectangular piece and a second rectangular piece congruent with the first rectangular piece are opposed to each other, one of the four peripheral edges thereof is opened, and the first rectangular piece is thermally fused in a bag shape. In a sterilization bag, a third rectangular piece having the same length as the bottom length of the bag and two opposite sides is disposed at a position corresponding to the bottom of the bag, and the third rectangular piece is placed on the opposite side. Fold it in two so as to be symmetrical with a line parallel to the two sides, and make the mountain fold line the first line.
The third rectangular piece is positioned at the bottom edge of the first rectangular piece and the bottom edge of the second rectangular piece, except for the area sandwiching the mountain fold line; Independently heat-sealing, the region sandwiching the mountain fold line is left as a ship bottom-shaped non-fused portion, and the first
One of the rectangular piece and the second rectangular piece, a surface formed of a heat-fusible synthetic resin film or a heat-fusible nonwoven fabric,
A first surface formed of a non-woven fabric, paper, or a synthetic paper, and a lower portion of one of the surfaces being a surface formed of the heat-fusible synthetic resin film; The other of the rectangular piece and the second rectangular piece is formed entirely of a heat-fusible synthetic resin film, and the third rectangular piece is formed of a heat-fusible synthetic resin film. And

In addition, in the present invention, one of the first rectangular piece and the second rectangular piece is provided with a surface made of the nonwoven fabric, paper, or synthetic paper on an upper part thereof. It is preferred that

In the present invention, it is preferable that the surface made of the nonwoven fabric, paper, or synthetic paper occupies 70% or more of the first rectangular piece or the second rectangular piece. In addition, it is more preferable that the rectangular piece made of the nonwoven fabric, paper, or synthetic paper has gas permeability, vapor permeability, and water repellency.

Further, the heat-fusible synthetic resin film is
It is preferable that the first layer has a melting point of 100 ° C. or more and less than 200 ° C., and the second layer has a melting point of 200 ° C. or more.

In a more preferred embodiment, the first layer is made of polyethylene or polypropylene, and the second layer is made of polyamide or polyethylene terephthalate.

[0016]

In the present invention, a third rectangular piece provided at the bottom of the sterilization bag enables the sterilization bag to stand up and stably hold, thereby enabling a vertically long arrangement. In other words, the third rectangular piece that has been folded in half is spread to form a bottom (ship-bottom non-fused portion), and the first rectangular piece and the second rectangular piece form a cylindrical side wall. A large volume can be obtained, so that more forceps can be accommodated. Moreover, since the first to third rectangular pieces are closely adhered to each other by heat fusion (heat sealing), there is no risk of contamination by various bacteria.

The first or second rectangular piece is a nonwoven fabric,
Since it has a surface composed of paper and synthetic paper, it can be provided with water vapor permeability and can be sterilized by an autoclave.

Further, rectangular pieces of the nonwoven fabric, paper and synthetic paper are
In the case of having steam permeability and water repellency, even if exposed to water vapor in the autoclave, it does not get wet and breaks, and it is possible to efficiently permeate the vapor into the bag and sterilize the forceps satisfactorily. Because it has gas permeability,
It can also be used for gas sterilization.

Hereinafter, a sterilization bag according to the present invention will be described in detail with reference to specific examples. <First Specific Example> FIG. 1 shows a first specific example (reference example) of the sterilization bag 16.
FIG. 2 is a partially cutaway perspective view showing the forceps 4 accommodated therein. The sterilization bag 16 mainly includes a back sheet 12 as a first rectangular piece, a front side film 11 as a second rectangular piece, and a bottom film 10 forming a third rectangular piece.

The front film 11 and the bottom film 10
Is made of a heat-sealable (heat-fusible) rectangular synthetic resin film. This synthetic resin film is composed of two layers having different melting points, for example, polypropylene (first layer) and polyamide (second layer).
Is dry-laminated. In addition, 6,6-nylon and 6-nylon are used as polyamide, and are simply referred to as nylon hereinafter.

On the other hand, the entire surface of the back sheet 12 is formed of a rectangular piece of paper having gas permeability and water vapor permeability and made of a pulp material or the like subjected to a water-repellent treatment. Back sheet 12
The bottom edge of the bottom film 10 and the bottom edge of the front film 11 and the two opposing sides of the bottom film 10 are heat-sealed at the bottom seal portion 19, and the bottom bottom non-fused portion of the bottom film 10, that is, the bottom film 10 is The region sandwiching the mountain fold line when folded is left without heat sealing, and the sterilization bag 16
Forming the bottom. Further, both side edges of the back sheet 12 and the front film 11 are heat-sealed by horizontal side seal portions 13, respectively.
And forms a side wall of the sterilization bag 16. Before use, the upper seal portion 8 is not bonded and is open.

Next, an operation method at the time of use will be described.
In use, for example, about ten forceps 4 are accommodated through the opening 8a of the sterilization bag 16, and the upper seal portion 8 is heat-sealed. Thereafter, the mixture is placed in an autoclave and sterilized at, for example, 121 ° C. and 2 atm for 20 minutes. Upon loading into an autoclave, the sterilization bag 16 of the first embodiment can be arranged vertically upright with the bottom film 10 on the bottom side, so that space can be saved, and therefore, many products to be sterilized can be processed. Can be simultaneously stored in the autoclave.

As described above, the back sheet 12 has gas permeability,
Has vapor permeability and water repellency. Therefore, even when exposed to water vapor, the water vapor does not easily break when wet, and the water vapor can flow through the back sheet 12, so that sterilization by an autoclave becomes possible. On the other hand, since it has gas permeability, gas sterilization with ethylene oxide gas can also be performed.

In using the forceps 4 in the sterilization bag 16, it is recommended that the sterilization bag 16 containing the forceps 4 be placed in a forceps stand, and the upper seal portion 8 be opened and used. At this time, since the forceps 4 do not directly touch the forceps stand, it is not necessary to sterilize the forceps stand.

In order to open the upper seal portion 8, as shown in FIG. 2, the upper end portions of the bag of the front film 11 and the back sheet 12 are respectively held and opened in the direction of arrow A (hereinafter, this opening). Is called peel open). In the operation of tearing and opening the upper end of the sterilization bag 16 as in the related art, paper dust may be scattered, and germs attached to the outside of the bag may enter the sterilization bag. However, since the first specific example has a configuration that can be opened by peel-opening, there is no concern that various bacteria enter the inside. In the case of peel open, naturally, scissors are not required, and extra sterilization processing is reduced.

As described above, the front film 11 and the bottom film 10 are made of a heat-sealable synthetic resin.
When heat sealing, the first layer (for example, polypropylene) is melted by heating, and the second layer (for example, nylon)
Is heat sealed by maintaining its shape without melting. Since the respective rectangular pieces of the sterilization bag 16 are bonded by heat fusion in this manner, the bonding state is established in which the peel open is possible.

The sterilization bag 16 of the first embodiment is also used.
As described above, since the bottom film 10 has a boat bottom shape, and the substantially cylindrical side surface formed by the front film 11 and the back sheet 12 is formed along the inner wall of the forceps stand, The sterilization bag 16 containing the forceps 4 can be completely and efficiently put into the forceps stand. Therefore, the internal space of the forceps stand is not occupied by the bag, and the sterilizing bag 16 having a substantially cylindrical shape has a large internal volume and can accommodate a large number of forceps 4.
A large number of forceps can be inserted without bringing the forceps 4 into contact with the forceps stand.

Further, the sterilization bag 16 includes the bottom film 10.
Since the bag 16 itself can be kept upright in the longitudinal direction with the portion as the bottom, if it is used by placing it on a fixed table, a forceps stand is unnecessary. Therefore, in the environment such as an operating room, when all the items to be brought in must be sterilized, there is no need to bring in a sterilized forceps stand, and the sterilization operation can be simplified.

Next, a specific example of the manufacturing process of the sterilization bag will be described. FIGS. 3A and 3B are views showing an example of the manufacturing process of the sterilization bag 16 shown in FIG.
The bottom resin film 20 forming the bottom film 10 is folded in two by the end folder 29, advances in the direction of arrow C, and has a punch 2 in a portion corresponding to the punch seal portion 17.
A hole can be made by 3. On the other hand, the resin film 21 forming the front side film 11 advances in the direction of arrow B, and the paper film 22 forming the back side sheet 12 advances in the direction of arrow D.

The bottom resin film 20 folded in two
Is sandwiched between the resin film 21 and the paper film 22 at the position of the bottom of the sterilization bag 16, and the heat sealers 24 a and 24
The bottom side seal portion 19 is heated and bonded at b. The temperature of the heat sealer 24a is set to 170 ° C. suitable for heat sealing, and the temperature of the heat sealer 24b is set to 240 ° C. which is slightly higher in consideration of the low thermal conductivity of paper.

Next, it is cooled by the cooler 25, and then is cooled by the heat sealing devices 26a to 26c.
3 is heat-sealed. At the time of this horizontal heat sealing, first, the paper film 22 side is heated by the heat sealing device 26a (2.
40 ° C.), and the resin film 21 side is heated (230 ° C.) by the heat sealer 26b. In this way, heating in two stages increases the strength of the seal portion compared to heating both sides simultaneously. The heat sealer 26c heat seals the punch seal portion 17, and since this portion is floating due to the thickness of the bottom resin film 20, the punch seal portion 17 is pressed and sealed.

After that, unnecessary portions (E and F portions shown in FIG. 3B) at the bottom and the top of the sterilization bag are removed from the leather 27.
Then, the lateral portion of the sterilization bag is cut by the cutting blade 28 to complete the individual sterilization bag 16.

<Second Specific Example> Next, a second specific example of the sterilization bag according to the present invention will be described. FIG. 4 is a partially cutaway perspective view showing a sterilization bag 36 as a second specific example and the forceps 4 stored therein. The front side film 11 as the second rectangular piece of the sterilization bag 36 and the bottom film 10 (third rectangular piece) forming the boat bottom part
Is similar to the sterilization bag 16 shown in FIG. On the other hand, the first rectangular pieces are the upper film 32 and the lower film 3.
5, two films 5 are joined, the upper film 32 is made of paper, and the lower film 35 is made of synthetic resin like the front film 11 and the bottom film 10.

The upper film 32 and the lower film 35 are heat-sealed by the side seal portion 33,
3. The bottom seal portion 19 and the punch seal portion 17 are also heat-sealed as described above. As for the operation method at the time of use, as in the first specific example, forceps and the like are housed through the opening 8a, the upper seal portion 8 is heat-sealed, and then sterilized.

In the second embodiment, similarly to the first embodiment, the internal volume is large and a large number of forceps can be accommodated.
In addition, the sterilization bag 36 can be placed upright in the longitudinal direction, sterilization by an autoclave or gas sterilization can be performed, and the second specific example further has the following operation and effect.

The lower portion of the sterilization bag receives the weight of the stored forceps. The heat-sealing part of the heat-fusible synthetic resin film and the paper film is
Since the heat-sealable synthetic resin films tend to peel off more easily than the heat-sealed portions, forceps may break through the lower heat-sealed portion of the sterilization bag 16 shown in FIG. However, in the case of the sterilization bag 36 shown in FIG. 4, since the lower side of the sterilization bag is composed of only the heat-fusible synthetic resin film, there is no possibility of peeling. In addition, when the sterilization bag 36 is used standing on the forceps stand, even if the inside of the forceps stand is wet, unlike the case where the bottom side is made of paper, moisture does not penetrate in the sterilization bag 36. There is no risk of contamination due to moisture penetration.

Regarding the ratio of the size (area) of the upper film 32 to the lower film 35, if the upper film 32 occupies 70% or more of the first rectangular piece, the paper film is used for steam sterilization. This is because the vapor is sufficiently transmitted from the upper film 32.

Next, a specific example of a manufacturing process of the sterilization bag 36 shown in FIG. 4 will be described. FIG. 5A is a diagram showing the entire flow of the manufacturing process, and FIG.
FIG. 5B is a view from the direction of the arrow Y.

The series of resin films 41 forming the front film 11 and the lower film 35 advance in the direction of arrow B, and the paper film 42 forming the upper film 32 advances in the direction of arrow D. Resin film 20 for bottom is 2
It is folded in a fold and proceeds in the direction of arrow C.

The direction of the resin film 41 is changed by a direction changer 43 and guided to a roll 44 (see FIG. 5C). Then, a portion of the lower film 35 (resin film) is formed by a laser 45. 48) and a portion (resin film 47) forming the front side film 11 and are changed in two directions (arrows B ₁ , B) by the direction changers 46b, 46a.
₍₂ directions) (see FIG. 5 (b)).

The resin film 48 is overlapped from the outside of the paper film 42 at the side seal portion 33, and the side seal portion 33 is heated and bonded by the heat sealers 24a and 24b. At the same time, the folded bottom resin film 20 is sandwiched between the resin film 47 and the resin film 48, and the bottom seal portion 19 is sealed with the heat sealer 24a,
Heated and bonded by 24b.

Next, similarly to the above, it is cooled by the cooler 25, the lateral seal portion 13 and the punch seal portion 17 are heat-sealed, and unnecessary portions at the bottom and upper portions are cut off. The lateral portions of the sterilization bag are cut to complete individual sterilization bags 36.

<Third Specific Example> Next, a third specific example of the sterilization bag according to the present invention will be described. FIG. 6 is a rear view showing a sterilization bag 56 as a third specific example. The front side film 11 as the second rectangular piece of the sterilization bag 56 and the bottom film 10 (third rectangular piece) forming the boat bottom part are the same as the sterilization bag 1 shown in FIGS.
6, 36 (first and second specific examples). While the first
Is formed by joining four films of an upper film 52a made of paper, a band film 55a made of synthetic resin, a lower film 52b made of paper, and a lowermost film 55b made of synthetic resin.

Each film of the first rectangular piece is heat-sealed by the side seal portion 33, and the horizontal seal portion 13, the bottom seal portion 19 and the punch seal portion 17 are heat-sealed in the same manner as described above.

As described above, the fusion between the synthetic resin films is strong, so that when peeling open when removing the contents after sterilization, the first rectangular piece and the second rectangular piece are used in the third specific example. Of the rectangular piece stops at the band film 55a. Therefore, there is no fear of peeling to the vicinity of the bottom at the time of peeling open, and this is useful in a case where the forceps stand is used without large peeling, such as a case where a sterilization bag is put in a forceps stand. It should be noted that the third specific example corresponds to the first and second embodiments.
It is needless to say that, similarly to the specific example 2, there is an operational effect such as accommodating a large number of forceps.

The combination of the paper film and the synthetic resin film in the first or second rectangular piece is a two-stage combination as in the sterilization bag 36 or a combination as in the sterilization bag 56. It is not limited to four-stage
You may combine in six steps or three steps. It is recommended that the ratio of the paper film is 70% or more of the first or second rectangular piece.

In the first to third embodiments, paper (pulp) is used for the back sheet 12 and the upper film 32. However, the present invention is not limited to this. As long as it has water repellency, synthetic paper or nonwoven fabric may be used.

In the first to third examples, a film made of a heat-sealable synthetic resin (a film made of a heat-sealable synthetic resin) was used for the front film 11, the bottom film 10, the lower film 35 and the like.

Further, in the first to third specific examples, a synthetic resin film composed of two layers of polypropylene and nylon is exemplified as the front side film 11 and the bottom film 10, but the present invention is not limited to this. Instead, any material having heat sealability may be used. For example, polyethylene (first
Film) and a film composed of nylon (second layer), a film composed of polyethylene (first layer) and polyethylene terephthalate (second layer), or a film composed of polypropylene (first layer) and polyethylene terephthalate (second layer) ) May be used. In this way, the first and second layers having different melting points are superimposed, and the first layer (melting point: 100 ° C. or more and less than 200 ° C.) is melted during heat sealing, and the second layer (melting point: 200 ° C. or more). Is heat-sealed by supporting the shape without melting.

[0050]

[Experiment] The sterilization bag 36 shown in FIG.
An upper film 32 and a lower film 35 made of synthetic resin;
An experiment on the size ratio was performed. Upper film
32 from the upper seal portion 8 to the side seal portion 33
L₁ Is 23 cm, the side seal part 33 of the lower film 35
L from the bottom to the bottom seal part 19 _Two Is a 10 cm sterilization bath.
(Hereinafter, referred to as a sample a), the upper film 32
Length L₁ Is 21cm, length L of lower film 35_Two Is 12
3 cm sterilization bags (hereinafter referred to as sample b)
Prepare bags and add chemical indicators to each sample a and b.
(Manufactured by FIMER), biochemical indicator
-(Manufactured by Three M Co.), and a shank gauze 15 folded into four
The sheets were accommodated, and the upper seal portion 8 was heat-sealed. still,
Make sure that the lower part of the sterilization bag 36 is the only part of the synthetic resin.
From the bottom, especially in the case of sterilization by autoclave
There is a concern that sterilization may not be performed
Chemical indicator on the worst condition of low
And biochemical indicators
Gauze could be loaded on top of it. Then,
Sterilize for 20 minutes at 121 ° C and 2 atm.
Was done.

As a result, in the case of sample a, the sterilization was judged to be good for both the chemical indicator and the biochemical indicator. On the other hand, in the case of sample b, the biochemical indicator was judged to be good for sterilization, but the chemical indicator was judged to be poor for sterilization.

As can be seen from the results, the lower film 3
The length L _{2 of} 5 is inappropriate when the length is 12 cm or more, and L ₂ is 1
It is preferably 1 cm or less, more preferably 10 cm or less. Therefore, the size (area) of the lower film 35 made of synthetic resin in the first rectangular piece is preferably about 30% or less, and the size of the upper film 32 made of paper is preferably about 70% or more. I understand.

[0053]

An embodiment of the first specific example will be described below. In this embodiment, the first rectangular piece (paper sheet 1)
2) consists of a 18cm wide, 33cm long paper sheet,
Its physical properties are: basis weight: 70.3 g / m ² , thickness: 110.6 μm, density: 0.64 g / cm ³ , vertical tensile strength: 10.53 kg / 15 mm, horizontal tensile strength: 6.70 kg / 15 mm, smoothness: 10.4 sec. (Test method JIS P
8119), air permeability: 16.6 sec. (Test method JIS P 8117), and wet tensile strength: 4.08 kg / 15 mm.

The second rectangular piece (front film 11) is a synthetic resin film 18 cm wide and 33 cm long, and the third rectangular piece (bottom film 10) is a synthetic resin film 18 cm wide and 9 cm deep. is there. These synthetic resin films are obtained by dry laminating nylon on polypropylene.

The lateral seal portion 13 is heat-sealed to a width of 5 mm, the bottom seal portion 19 is heat-sealed in an arc shape, and the punch seal portion 17 is heat-sealed to form the paper sheet 1.
2 and the front film 11 and the bottom film 10 are adhered. The upper seal portion 8 heat seals after accommodating the forceps.

[0056]

As is apparent from the above description, the sterilization bag of the present invention is securely sealed, and can store many forceps in one bag. Therefore, when a large number of forceps are used. It is convenient. In addition, since the forceps do not directly touch the forceps stand by putting the bag in the forceps stand, sterilization of the forceps stand is unnecessary. Further, the sterilization bag of the present invention does not take up space during sterilization or storage. In addition, the sterilization bag of the present invention can be sterilized by an autoclave, and sterilization of the autoclave is a method generally used in hospitals and the like, and is therefore most suitable for use in hospitals and the like. Gas sterilization is also possible.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a sterilization bag according to a first specific example (reference example).

FIG. 2 is a side view for explaining how to open a sterilization bag according to the present invention.

FIG. 3 is a view showing an example of a method of manufacturing a sterilization bag.

FIG. 4 is a partially cutaway perspective view showing a sterilization bag according to a second specific example of the present invention.

5 is a view showing a method of manufacturing the sterilization bag shown in FIG.

FIG. 6 is a rear view showing a sterilization bag according to a third specific example of the present invention.

FIG. 7 is a view showing a conventional sterilization bag and forceps inserted therein.

FIG. 8 is a view showing a state where the forceps are erected on the forceps stand.

[Explanation of symbols]

 4 Forceps 5 Forceps stand 8 Upper seal part 10 Bottom film 11 Front film 12 Back sheet 13 Lateral seal part 16, 36, 56 Sterilization bag 17 Punch seal part 19 Bottom seal part 32 Upper film 33 Side seal part 35 Lower side Film 52a Upper film 52b Lower film 55a Strip film 55b Lowermost film

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-30844 (JP, A) JP-A-4-102457 (JP, A) JP-A-59-93674 (JP, A) 73148 (JP, U) Fully open Hei 1-144045 (JP, U) Fully open Showa 61-4641 (JP, U) Fully open Showa 60-13140 (JP, U) Fully open Showa 62-30842 (JP, U) 57-10812 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61L 2/00-2/26 B65D 30/00-33/38 B31B 1/00-49 / 04

Claims (6)

(57) [Claims] 1. A sterilization bag comprising a first rectangular piece and a second rectangular piece congruent with the first rectangular piece facing each other, one of its four peripheral edges being opened, and being heat-sealed in a bag shape. A third rectangular piece having the same length as the bottom length of the bag as two opposite sides is disposed at a position corresponding to the bottom of the bag, and the third rectangular piece is symmetrical with a line parallel to the two opposite sides. And the mountain fold line is positioned so as to be sandwiched between the first and second rectangular pieces, and the third rectangular piece is placed in the first position while leaving an area sandwiching the mountain fold line. each independently by heat sealing a rectangular piece bottom edge and a second rectangular piece bottom edge, the region flanking the mountain fold line a which was left as a ship bottom shaped unfused portion, the first One of the rectangular piece and the second rectangular piece
Composed of adhesive synthetic resin film or heat fusible nonwoven fabric
Pair of a nonwoven, paper, or synthetic paper
The lower part of said one
Is the surface composed of the heat-fusible synthetic resin film.
The other is composed entirely of a heat-sealable synthetic resin film.
It is the third rectangular piece, composed of a heat-fusible synthetic resin film
A bag for sterilization characterized by being made . 2. The non-woven fabric according to claim 1 , wherein
The sterile bag according to claim 1 , further comprising a surface made of cloth, paper, or synthetic paper . 3. A non-woven fabric, paper, or synthetic paper.
Surface of the first rectangular piece or the second rectangular piece
The sterilizing bag according to claim 1 or 2 , which occupies 70% or more . Wherein said non-woven fabric, paper or rectangular piece made of a synthetic paper, sterilizing bag according to any one of claims 1 to 3 and has a gas permeability and vapor permeability and water repellency, . 5. The heat-fusible synthetic resin film comprises first and second two layers, wherein the first layer has a melting point of 100 ° C. or more and less than 200 ° C., and the second layer claims 1 to 4 is a melting point of 200 ° C. or higher
A bag for sterilization according to any one of the above. 6. The sterilization bag according to claim 5 , wherein the first layer is made of polyethylene or polypropylene, and the second layer is made of polyamide or polyethylene terephthalate.