WO2005079871A1

WO2005079871A1 - Sterilizing bag

Info

Publication number: WO2005079871A1
Application number: PCT/JP2005/003206
Authority: WO
Inventors: Takeshi Miyamura; Keiji Abe; Teiko Sutoh
Original assignee: Kao Corporation; Fujimori Kogyo Co., Ltd.
Priority date: 2004-02-25
Filing date: 2005-02-25
Publication date: 2005-09-01
Also published as: JPWO2005079871A1; JP4598764B2

Abstract

[PROBLEMS] A sterilizing bag suitably housing medical instruments having sharp tip ends or irregularities such as large tweezers and forceps, and capable of effectively restricting the occurrence of undesired unsealing and damage due to a contact by a sharp tip end. [MEANS OF SOLVING PROBLEMS] A sterilizing bag (10) comprising a gas permeable base material (12) and a synthetic resin film (14) of which the side edges and lower ends or their vicinities are bonded together leaving an opening at the upper portion, characterized in that the bag (10) has a buffer member (16) disposed by being respectively bonded at one end thereof to the base material (12) and at the other end to the film (14), with a distance from the portion bonded with the base material (12) to the lower end being mutually different from a distance from the portion bonded with the film (14) to the lower end.

Description

Specification

Sterilization bag

Technical field

The present invention relates to a sterilization bag excellent in handleability, and more particularly, to a sterilization bag suitably used for storing and sterilizing a medical device having a sharp end or unevenness.

Background art

[0002] Instruments used for surgery or treatment must be sterilized before use, and the packaging bag contains tangible materials such as machine parts and various instruments. If it is solid, a peel-open system that peels off and opens or an easily tearable film is used. For example, as a sterilization method used in hospitals and the like, an object to be sterilized such as large tweezers or forceps is placed in a sterilization bag having at least a gas permeable area and an area through which bacteria cannot pass, and sealed. Thereafter, a method of performing sterilization using high-temperature steam, plasma, ethylene oxide gas (EOG), or the like can be given. The sterilized instrument is stored in this packaging bag until it is used for surgery or the like, and is opened and used for surgery or treatment. Therefore, the sterilization packaging bag is selected to be easily opened even if the doctor or practitioner uses gloves in the hospital. For example, a form in which two thin rectangular sheets, usually referred to as sheets or films, on the front and back (hereinafter referred to as “films”) are releasably bonded, That is, there may be mentioned, for example, an embodiment in which the film is manufactured using a film having a characteristic of easily tearing and opening. For opening, the former uses a so-called peel-open method in which two films are peeled off, and the latter generally uses a tear-opening method.

[0003] A medical instrument having sharp tips or irregularities such as large tweezers or forceps is put into such a sterilization bag, sterilized, and then put into a container like a forceps stand together with the bag for easy use. It is common practice to use the forceps or the like standing upright. As described above, the sterilization bag is formed by heat-sealing the two films so that they can be peeled off. Therefore, when storing such a medical device in a sterilization bag, or when putting a sterilized package into a forceps stand, the distal end of the stored object is heat-sealed near the lower end of the sterilization bag. There is a problem that the heat-sealed portion is peeled off and opened when it comes into contact with the portion.

[0004] Further, as a film constituting a sterilization bag, it is necessary to use a film that is gas-permeable and does not allow bacteria to pass through, or a film that has the strength of a nonwoven fabric. When inserting medical instruments with sharp tips or irregularities, such as large tweezers or forceps, the sharp tips of the material to be sterilized are pulled into the gaps between the paper and nonwoven fibers, or stored in the gaps between the fibers. There is a risk that a pinhole may be opened in the gas-permeable film due to the sticking of the convex portion of the unevenness of the object, making it impossible to use the sterilization bag.

[0005] As a bag for sterilizing an object to be sterilized having such a sharp tip, a sterilization bag having a bottom portion formed of a boat-shaped bottom film made of a synthetic resin has been proposed (see, for example, Patent Document 1). ) o Such a sterile bag is folded in a mountain fold when the synthetic resin film on the bottom is not used. When the object to be sterilized is put into such a sterilization bag, the bottom of the bag is opened to form a so-called standing bouch, and this has the advantage that it does not take up space when storing a plurality of forceps or the like upright. Have. However, when a forceps or the like is put into such a sterilization bag, since the synthetic resin film forming the bottom is mountain-folded with the upper end as a folding end, the tip of the forceps put into a joint portion with the nonwoven fabric is used. However, there still remained the problem that contact was likely to occur immediately, such as damage accidents.

Patent document 1: JP-A-8-168518

Disclosure of the invention

Problems to be solved by the invention

[0006] The present invention has been made to solve such a problem. An object of the present invention is to effectively prevent the occurrence of undesired opening or breakage due to contact of a sharp tip or unevenness, which is suitable for storing a medical instrument having a sharp tip or unevenness such as a large tweezer or a scalpel. Another object of the present invention is to provide a sterilization bag which can be suppressed.

Means for solving the problem

[0007] The sterilization bag of the present invention is a sterilization bag formed by bonding a side edge portion and a lower end portion while leaving an opening at an upper end portion of a gas permeable base material and a synthetic resin film disposed to face each other. An end of a buffer member for buffering an impact is adhered to a gas permeable base material, and the other end is adhered to a synthetic resin film on the inner surface near the lower end of the sterilization bag. However, the distance between the lower end of the adhesive portion and the distance from the lower portion of the synthetic resin film to the gas permeable base material is different from each other.

[0008] Here, the distance between the lower end of the cushioning member and the lower end of the bonding portion with the gas permeable substrate is longer than the distance between the lower end of the bonding portion with the synthetic resin film and the lower end. By doing so, it is possible to effectively prevent damage to the gas-permeable substrate and to have a feature that the tip of the medical device can be easily confirmed.

[0009] The cushioning member is selected from a gas permeable base material constituting the sterilization bag, a synthetic resin film constituting the sterilization bag, and an adhesive portion between the gas permeable base material and the synthetic resin film. It has the function of protecting the above.

[0010] As the buffer member, any synthetic resin film that is disposed inside the sterilization bag and constitutes the sterilization bag, and any film that can be adhered to the gas-permeable substrate can be used without any particular limitation. Generally, a film having high strength, for example, a synthetic resin film or the like is used as a film constituting such a cushioning member. In addition, a film having gas permeability as a film constituting the buffer member, such as a nonwoven fabric, a synthetic resin film having a large number of small holes, a gas-permeable porous synthetic resin film having fine voids, etc. Can also be used. When a gas is used for the sterilization treatment, the cushioning member using such a film can be suitably used, for example, for autoclave sterilization that requires water vapor permeability, and the viewpoint power for improving the sterilization effect is also preferable. .

[0011] These sterilization bags are suitably used for sterilizing one or two or more types of medical instruments whose scalpel, tweezers, forceps, and scissor force are also selected.

[0012] Normally, gas-permeable paper, nonwoven fabric, and synthetic resin film used in sterilization bags as a base material that is gas-permeable and impermeable to bacteria can be formed by using microscopic gaps between fibers or resin foil. Fine voids in the film ensure gas permeability. When paper or nonwoven fabric, which is a substrate that also provides fiber power, is used among such substrates, in the area where they are exposed inside, the material to be sterilized having a sharp tip, for example, large tweezers, etc. If the tip or irregularities come into direct contact with the paper or nonwoven fabric during the injection, the tip or irregularities of the material to be sterilized may penetrate the microscopic voids in the fiber region. This intrusion creates pinholes in the base material, and tears are applied by pulling on the ends of the fibers and the fusion between the fibers. A problem arises that it forms. There is also a problem that a film substrate having many small holes is easily damaged due to the porous structure. This tendency is particularly remarkable in the case of large tweezers or the like, in which the weight of the fiber causes a stress between fibers. In the present invention, the above-described problem is prevented by arranging a buffer member for buffering an impact at the time of inputting an article inside the sterilization bag, and a vertical direction at the time of inputting the article to be sterilized is provided. Peeling of the adhesive portion of the sterilization bag and breakage of the film due to stress can be effectively suppressed. Therefore, by using the sterilization bag of the present invention having such a function, it is possible to effectively prevent the sterilization bag from being damaged due to the tip or unevenness of an object to be sterilized such as a medical device, and undesired opening.

The invention's effect

According to the sterilization bag of the present invention, undesired opening or breakage accidents caused by contact of the sharp tip can be prevented even when a medical instrument having a sharp tip or unevenness such as large tweezers or a scalpel is stored. This has the effect of being able to be effectively suppressed.

Brief Description of Drawings

FIG. 1 is a perspective view including a broken portion of a sterilization bag having a buffer member between the surface of a sterilized paper and a side film.

FIG. 2 is a cross-sectional view showing the vicinity of a lower end of a sterilization bag having a buffer member between the surface of a sterilized paper and a side film.

FIG. 3 shows a perspective view of a sterilization bag of Example 2 including a broken portion.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail.

[0016] The sterilization bag of the present invention includes a gas-permeable substrate, a synthetic resin film, and a cushioning member that are arranged facing each other. In detail, one side film is composed of a base material such as gas permeable paper, nonwoven fabric or porous synthetic resin film (gas permeable base material; hereinafter, appropriately referred to as sterilized paper), and the other side film is formed. The film is composed of a synthetic resin film. With this configuration, the sterilization bag of the present invention is excellent in sterilization efficiency and adhesiveness. The object to be sterilized stored in the sterilization bag can be visually confirmed through a synthetic resin film. From the viewpoint of power, the synthetic resin film used here is preferably transparent. First, preferred embodiments of the sterilization bag of the present invention will be described with reference to examples. The sterilization bag of the present invention uses sterile paper and synthetic resin film as two side films. These two films are arranged facing each other, and the side end and the lower end are releasably adhered to each other, leaving an opening at the upper end. The adhesion between the two base films can be easily achieved by using a heat-fusible synthetic resin film as at least one side film. In order to more reliably control the adhesive strength and peelability, (1) a method using an easy peel (easy peeling) adhesive, (2) a non-woven fabric of thermoplastic resin as a gas permeable base material, A method in which both are combined using a thermoplastic transparent synthetic resin film that exhibits appropriate adhesive strength as a synthetic resin film. (3) A seal layer is laminated on sterilized paper so that gas permeability can be maintained. A known method such as a method of bonding the two by heat fusion (heat sealing) may be appropriately selected, or a combination of a plurality of these methods may be used.

[0018] Sterilization paper, which is a gas-permeable substrate used in the sterilization bag of the present invention, is usually subjected to sterilization using high-temperature steam, ethylene oxide gas (EOG), plasma, or the like. It is necessary that the material be capable of transmitting gas (gas) as an active ingredient and not transmitting bacteria. As a material for such sterilized paper, paper may be used, but it is preferable to select and use a non-water-absorbing material such as polyester, polyvinyl chloride, polyethylene, polypropylene, and fluorine. Specifically, for example, a gas-permeable polyethylene or a polypropylene nonwoven fabric may be used. Also, a special continuous porous synthetic resin film such as a porous film made of tetrafluoroethylene may be used.

Further, a synthetic resin film is used for the side film facing the gas-permeable substrate from the viewpoint of cost, strength, and visibility of contents. This synthetic resin film is obtained by molding a synthetic resin selected according to the purpose by melt extrusion, casting and calendering. Although there is no particular limitation on the synthetic resin film, a preferred synthetic resin is a synthetic resin having a heat-fusing property, since the operation at the time of bonding is easy. Among them, polyolefins such as polyethylene (PE) and polypropylene (PP) and polychlorinated butyls are preferable from the viewpoint of heat fusibility. The synthetic resin film is not necessarily required to have a single-layer structure. A laminated structure may be used according to the purpose. For example, the above-mentioned heat-fusibility When the side film is composed of a synthetic resin film having the following properties, the side film only needs to have heat-sealing properties on one side, and the other side should be biaxially stretched with polyethylene terephthalate (PET), nylon, Films can be laminated. Such a laminated structure is preferable because the strength against piercing and impact is improved. The biaxially stretched film may be laminated in two or more layers.

[0020] The thickness of the synthetic resin side film is a force that can be appropriately selected depending on the purpose. Generally, the thickness is in the range of 30 to 100 µm.

[0021] The buffer member, which is a characteristic configuration of the present invention, is disposed in the region near the lower end of the sterilization bag of the present invention. As the material of the cushioning member, a material similar to the above-described synthetic resin film or gas permeable base material may be selected and used. Further, a film made of foamed resin such as foamed urethane having excellent buffer properties, a sheet made of rubber or an elastomer, or the like may be used. The cushioning member does not necessarily need to be made of a uniform material. For example, a single sheet partially having gas permeability may be used in which different materials such as a combination of the synthetic resin sheet and a gas-permeable substrate are bonded and connected to each other. In addition, a sheet having a laminated structure in which a plurality of different films are bonded to each other can be used.

[0022] The buffer member itself may or may not have gas permeability.

From the viewpoint of reducing the thickness of the sterilization bag, the buffer member is preferably a film-shaped member. Normally, the cushioning member is a rectangular film-shaped member, and one end is attached to the synthetic resin film and the other end is attached to the gas permeable base material in the vicinity of the lower end of the sterilization bag. At this time, it is necessary that the distances from the adhesive portions at both ends to the lower end of the sterilization bag are different from each other. In a preferred embodiment, the distance between the lower end of the cushioning member and the lower end of the bonding portion with the gas-permeable substrate is longer than the distance from the upper end to the lower end of the bonding portion with the synthetic resin film. It takes a long time. In the cross section, the cushioning member is arranged to be inclined in the vertical direction. When an object to be sterilized, such as tweezers, is inserted, its tip first contacts the cushioning member and slides on the side of the slope, so that the adhesive between the cushioning member and the side film or the side sterilizing paper is formed. Of these, it will stop at the adhesive part located below.

[0024] From the viewpoints of strength stability and easiness of manufacture, the width of the cushioning member is set to be equal to that of the sterilization bag. It is preferable that the buffer member is adhered to both sides of the gas-permeable base material in the same manner as the synthetic resin film. However, it is not limited to this.

[0025] The gas permeability of the buffer member is examined. For example, in a sterilization bag using EOG or the like, gas exchange is forcibly performed, so that the gas permeability of the buffer member is low. Is also good. However, when applied to a sterilization method using high-temperature steam, plasma, or the like, it is preferable to use a film having sufficient gas permeability for the buffer member from the viewpoint of improving sterilization efficiency. The gas permeable film is not limited to paper or nonwoven fabric, but may be a general synthetic resin film having fine openings or a special porous synthetic resin film having fine voids.

[0026] The sheet material is knitted or woven with a synthetic resin film, a nonwoven fabric, a metal foil, a synthetic resin filament or a synthetic fiber, which is not particularly limited as long as it has a strength enough to withstand piercing by the contents. And nets.

Among them, a gas-impermeable buffering member is preferable because, for example, a polyethylene or polypropylene synthetic resin film having a thickness of about 50 to 200 μm or the like can be easily checked. As the buffer member of a gas permeable, basis weight 5-LOOG Zm ^2, and preferably nonwoven cloth such as polyethylene or polypropylene has excellent thermal fusion strength is about ² 20- 60GZm, cormorants viewpoint force Preferred,.

[0028] The shock-absorbing member is provided with at least one of a gas-permeable base material inner surface, a synthetic resin film, and an adhesive portion between the gas-permeable base material and the synthetic resin film due to an impact at the time of input of an object to be sterilized. It has the function of protecting one, and the material and arrangement position of the buffer member can be selected according to the purpose.

[0029] When protecting the gas permeable substrate, it is effective to arrange the cushioning member so that the bonding portion with the gas permeable substrate is on the upper side. In the case of active protection, it is effective to arrange the cushioning member so that the bonding portion with the synthetic resin film is located above. In any of these modes, the tip end of the object to be sterilized is stopped at the bonding portion below the buffer member, so that the lower end bonding portion of the sterilization bag is effectively protected.

[0030] These cushioning members are attached to the inside of the sterilization bag by heat fusion, adhesion, or the like. It is.

[0031] The cushioning member is formed using a member different from the two side sheets (gas permeable base material and synthetic resin film), for example, another gas permeable base material / synthetic resin film or the like. .

[0032] The material such as the gas permeable base material / the synthetic resin film used for the buffer member may be the same as or different from the material constituting the side sheet.

When the cushioning member is arranged inside the sterilization bag, the upper end of the cushioning member (the end on the opening side of the sterilization bag) is heat-sealed to the side film constituting the sterilization bag, or an adhesive or the like. It is adhered using. At the time of disposition, the upper end of the cushioning member is brought into close contact with the side surface film, so that it is possible to prevent the object to be sterilized from being caught on the end of the cushioning member. The lower end of the cushioning member is heat-sealed or bonded to the other side film in the same manner as above, and the tip of the object to be sterilized is stopped at the bonded portion.

[0034] With such a structure, a gap is formed below the cushioning member between the cushioning member and the bag lower end bonding portion. For this reason, the impact when the object to be sterilized is buffered, and even if the tip of the object to be sterilized damages the adhesive part below the cushioning member, the adhesive at the lower end of the sterilization bag is effectively protected. Having. When the cushioning member is a film having heat-sealing properties only on one side, the film may be folded back and sealed at the lower bonding portion.

FIG. 1 is a perspective view showing a preferred embodiment of the sterilization bag of the present invention, which is partially broken, in order to clarify the laminated state of each film constituting the sterilization bag. FIG. 2 is a cross-sectional view of the vicinity of the lower end of the sterilization bag for clarifying the configuration.

[0036] The gas-permeable base material 12, which is one of the side films constituting the sterilization nog 10, is made of sterilized paper, and the other is at least the innermost layer of a synthetic resin film 14 such as polyethylene or polypropylene, which has heat-fusibility. . In the vicinity of the lower end of the sterilized paper 12, a cushioning member 16 having a heat-sealable synthetic resin film, such as polyethylene-polypropylene, on both sides, is also provided. The upper end of the sterilization bag 10 is open for storing the object to be sterilized, and the sterilization paper 12 and the synthetic resin film 14 are bonded by heat fusion at the lowermost end. In addition, the lowermost bonded part does not necessarily have to be bonded over the entire surface. A region may have a non-fused portion without deteriorating the characteristics.

[0037] One end of the buffer member 16 is bonded to the sterilized paper 12 by heat fusion, and the other end is arranged to face the sterilized paper 12 and bonded to the synthetic resin film 14 by heat fusion. In this embodiment, the upper end of the cushioning member 16, that is, the end portion on the upper opening side of the sterilization bag is in contact with the sterilizing paper 12, and the lower end, that is, the end portion on the lower end adhesive portion 20 side of the sterilization bag, is synthetic. Adhered to resin film 14.

Here, a preferred position of the buffer member in the sterilization bag will be specifically described.

First, the distance between the lower end portion of the cushion member as in the present embodiment and the lower end portion of the bonding portion with the gas permeable substrate is longer than the distance between the lower end portion of the bonding portion with the synthetic resin film and the lower end portion. The configuration will be described. As shown in the cross-sectional view of FIG. 2, the distance from the lower end of the bonding portion between the gas permeable substrate 12 and the synthetic resin film 14 to the lower end of the bonding portion between the cushioning member 16 and the gas permeable substrate 12 is A, When the distance from the lower end of the bonding portion between the gas permeable base material 12 and the synthetic resin film 14 to the upper end of the bonding portion between the cushioning member 16 and the synthetic resin film 14 is B, the cushioning performance, the simplicity of production, and the cost From the viewpoint of the distance, the distance A is preferably 20 to 100 mm, more preferably 30 to 90 mm, and particularly preferably 50 to 80 mm. The distance B is preferably 8 to 30 mm, more preferably 10 to 25 mm, and particularly preferably 12 to 2 Omm. Here, it is essential that distance A> distance B.

[0040] The distance (ゝ ') from the upper end of the adhesive portion to the gas permeable substrate to the lower end of the buffer member is the distance from the lower end of the adhesive portion to the synthetic resin film to the lower end ( The preferred ranges of the distance A ′ and the distance B ′ in the case of the より configuration are shorter than the distance Β ′), except that the distance Α ′ <the distance B ′, except that the preferred numerical ranges shown in the above distance Α and the distance 前記Is the same as That is, the distance B 'is the same as the numerical range at the distance A, and the distance A' is the same as the numerical range at the distance B.

[0041] In the sterilization bag 10 of the present embodiment, when the object to be sterilized is inserted, even if the tip has a sharp shape, the object to be sterilized is inclined and fixed near the lower end. The synthetic resin film comes into contact with the surface of the buffer member 16, which also becomes strong, is guided to slide on the surface, and stops at the bonding portion between the synthetic resin film 14 and the buffer member 16. Due to its high strength and surface smoothness, the cushioning member 16 made of a synthetic resin film In addition to protecting the lower end adhesive portion 20 between the sterilized paper 12 and the synthetic resin film 14, the shock at the time of injection is damped.

[0042] Further, a gap 22 is formed between the adhesive portion between the upper end of the cushioning member 16 and the sterile paper 12 and the lower end adhesive portion 20 between the gas permeable base material and the synthetic resin film disposed facing each other. The sterilization bag 10 is excellent in durability because it is formed and exhibits a function of cushioning the shock that the object to be sterilized put into the sterilization bag 10 directly gives to the lower end bonding portion 20.

In the present embodiment, the force of using a synthetic resin single-layer film such as polyethylene or polypropylene as the cushioning member 16 is not limited to this. It may be a laminate of such a film and a high-strength synthetic resin film such as polyester or nylon, and may be made of a laminated film made of a synthetic resin having heat-fusing properties on both sides. Further, it may be made of sterilized paper such as a nonwoven fabric, or may be a synthetic resin film and sterilized paper spliced together by bonding.

As the cushioning member 16, V or a film having heat-fusing property only on one side and not having heat-fusing property on the other side may be used. It is preferable to use a buffer member having the same. The reason is that both ends of the buffer member having the same width as the width of the sterilization bag 10 can be sandwiched between the fusion parts at both ends so that the function as the buffer member is improved and the material of the buffer member is continuously formed. This is because production can be facilitated because the film can be supplied. In the case where the cushioning member and the side sheet are bonded via another adhesive, a film that does not necessarily have sufficient heat-fusibility can be used.

[0045] It should be noted that, as a material constituting the cushioning member 16, the synthetic resin film 14, and the sterilizing paper 12, a material having a heat-sealing property is selected. Since a strong heat-sealed portion can be used, the bonded portion is not easily peeled off even when the tip of tweezers or the like is received. Also, even if a situation occurs in which a part of the sterilization bag 10 is peeled off, there is a gap 22 between the lower end adhesive portion 20 of the sterilization bag 10 and the lower end adhesive portion (thermally fused portion) of the cushioning member 16. However, the effect on the lower end bonding portion 20 of the sterilization bag 10 is extremely small.

By adhering the upper end of the buffer member 16 to the gas permeable substrate 12 and the lower end to the transparent synthetic resin film 14 as in the present embodiment, the surface of the sterilized paper 12 having irregularities and voids can be formed. Can be protected effectively.

The position where the cushioning member 16 is bonded is not limited to this, and from the viewpoint of protecting the transparent synthetic resin film 14, the upper end is attached to the transparent synthetic resin film 14 and the lower end is attached to the gas-permeable base material 12. Adhesion is also possible.

The advantage of visually confirming the contents via the buffer member 16 will be described. There are various types of tweezers to be sterilized, and the gripping parts are all similar. When the buffer member 16 made of a transparent synthetic resin film is used, the side surface of the buffer member 16 is positioned in the direction of the transparent synthetic resin film 14, so that it is possible to confirm well up to the lower end bonding portion 20 of the buffer member 16. This is useful in terms of making sure that the instrument is selected during the medical procedure, and also has the advantage that if there is a defect at the tip of the instrument, it can be easily confirmed. In addition, it is important for the safety of the user to be able to see the tip of the material to be sterilized.

On the other hand, from the viewpoint of air permeability, it is also a preferable embodiment to use a gas permeable base material as the buffer member 16. For example, by adhering the upper end of the buffer member 16 made of a gas-permeable base material to the sterile paper 12 and the lower end to the transparent synthetic resin film 14, respectively, it has excellent air permeability, so that the synthetic resin film opposed 14 is transparent and can be easily seen through a film, so that the contents can be easily confirmed and the safety is high.

[0050] The sterilization bag of the present invention has a sharp tip such as large tweezers, forceps, scissors, etc., because the shock that the tip of the bag invades when the object is inserted is reduced by the buffer member. When inserting and holding a sterile material, undesired tearing of the bag, generation of pinholes, and breakage such as peeling of the lower end adhesive portion can be effectively prevented, and its application range is wide.

Example

Hereinafter, the present invention will be described in detail with reference to specific examples, but the present invention is not limited thereto.

(Example 1)

Width 75 mm X height 350mm basis weight 70 g, a gas permeable substrate 1 2 consisting of paper sterile paper m ^2, a same size as the substrate 12, 12 biaxial stretching m PET and 30 mu m resin lamination The synthetic resin film 14, which also has physical strength, was used as a side film of a sterilized nog.

A nonwoven fabric made of polypropylene having a width of 70 mm and a height of 50 mm and a basis weight of 50 gZm ² is used as the cushioning member 16, and one end of the nonwoven fabric is heat-sealed with a width of 5 mm at a position 65 mm from the lower end of the gas-permeable base material 12. Was. Further, the other end of the buffer member 16 was thermally fused with a width of 5 mm at a position 15 mm from the lower end of the synthetic resin film 14.

[0053] The synthetic resin film 14 and the gas-permeable base material 12 are overlapped with the cushioning member 16 sandwiched therebetween, and a heat-sealed portion having a width of 5 mm at the lower end and a width of 5 mm at both side edges is formed to have a width of 75 mm and a height of 75 mm. A sterilization bag 10 as shown in FIG. 1 having a size of 350 mm was obtained.

The opening end of the sterilization bag 10 was opened by hand, slanted, and large forceps having a sharp tip, a weight of 80 g and a length of 25 cm were also applied to the opening portion. The tip of the tweezers was inserted so as to slide on the inner surface of the cushioning member 16, and the tip stopped at the bonding portion between the cushioning member 16 and the synthetic resin film 14. No damage to the sterilization bag due to this injection was observed. This force was repeatedly applied to 10 samples. In each case, no damage was observed in the sterilization bag, such as the generation of pinholes due to the hooking force at the tip or piercing.

[0055] In addition, it was found that this sterilization bag was able to ensure both excellent air permeability and the ease of checking the contents.

(Example 2)

Width 75 mm X height 350mm basis weight 70 g, a gas permeable substrate 1 2 consisting of paper sterile paper m ^2, a same size as the substrate 12, 12 biaxial stretching m PET and 30 mu As shown in FIG. 3, a sterile bag 24 of Example 2 was prepared in the same manner as in Example 1 above, using the synthetic resin film 14 having a laminated physical strength of resin of m as the side film of the sterilization nog. . FIG. 3 is a perspective view showing an embodiment of a sterilization bag 24 according to the second embodiment, including a partly broken portion.

In the present embodiment, a nonwoven fabric made of polypropylene having the same width as the side film and having a width of 75 mm × a height of 50 mm and a basis weight of 50 g / m ² is used as the cushioning member 26, and one end of the nonwoven fabric is provided under the gas-permeable base material 12. It was heat-sealed with a width of 5 mm at a position 65 mm from the end. Further, the other end of the buffer member 26 was heat-sealed with a width of 5 mm at a position 15 mm from the lower end of the synthetic resin film 14.

[0057] The synthetic resin film 14 and the gas permeable base material 12 are overlapped with the buffer member 26 sandwiched therebetween, and a heat-sealed portion having a width of 5 mm at the lower end and a width of 5 mm at both side edges is formed. 350m A sterile bag 24 having a size of m as shown in FIG. 3 was obtained.

[0058] The sterilized bag 24 was evaluated in the same manner as in Example 1. That is, the open end of the sterilization bag 24 was opened by hand, slanted, and large tweezers having a sharp tip, a weight of 80 g, and a length of 25 cm were thrown in from the opening. The tip of the tweezers was inserted so as to slide on the inner surface of the buffer member 26, and the tip stopped at the bonding portion between the buffer member 26 and the synthetic resin film 14. Damage to the sterilization bag due to this input was unseen. This force was repeatedly applied to 10 samples. In all samples, no damage to the sterilization bag was observed, such as the generation of pinholes due to the hooking force at the tip or piercing.

[0059] As in the case of Example 1, the sterilization bag 24 of Example 2 was found to have both excellent air permeability and easy confirmation of contents.

Claims

The scope of the claims

[I] A sterilization bag formed by bonding a side edge and a lower end, leaving an opening at an upper end of a gas permeable base material and a synthetic resin film disposed to face each other,

On the inner surface near the lower end of the sterilization bag, one end of a shock-absorbing buffer member is adhered to a gas-permeable substrate, and the other end is adhered to a synthetic resin film. A sterilization bag wherein a distance from a bonding portion cap to a gas permeable base material to a lower end portion and a distance from a bonding portion to a synthetic resin film to a lower end portion are different from each other.

[2] The distance between the lower end portion of the cushioning member and the lower end portion of the bonding portion with the gas-permeable substrate is longer than the distance between the lower end portion of the bonding portion with the synthetic resin film and the lower end portion. The sterilized bag according to claim 1, wherein

[3] The buffer member may include at least one selected from a gas permeable base material constituting a sterilization bag, a synthetic resin film constituting a sterilization bag, and an adhesive portion between the gas permeable base material and the synthetic resin film. 2. The sterilization bag according to claim 1, which is to protect.

[4] The sterilization bag according to claim 1, wherein the cushioning member also has a synthetic resin film strength.

[5] The sterilization bag according to claim 2, wherein the buffer member has a synthetic resin film strength.

[6] The sterilization nog according to claim 1, wherein the cushioning member is a base material having gas permeability.

[7] The sterilization nog according to claim 2, wherein the buffer member is a base material having gas permeability.

[8] The sterilization bag according to claim 1, wherein the buffer member is formed by joining a synthetic resin film and a gas-permeable base material.

9. The sterilization bag according to claim 2, wherein the buffer member is formed by joining a synthetic resin film and a gas-permeable base material.

10. The sterilization bag according to claim 1, wherein the sterilization nog is for sterilizing one or two or more medical instruments whose group strength is selected from scalpel, tweezers, forceps and scissors.

[II] The sterile nog is selected from the group consisting of scalpels, tweezers, forceps and scissors. 3. The sterilization bag according to claim 2, wherein the sterilization bag is for sterilizing two or more types of medical instruments.