JP2010120685A - Sterilizing bag, sterilizing bag body, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sterilizing bag, a sterilizing bag body, and its manufacturing method, maintaining a sufficient ventilation amount and forming the bag body which is not easily broken even when it is exposed to a rapid pressure reduction. <P>SOLUTION: End portions of two rectangular non-permeable films having the same width and different lengths are overlapped with each other, or caused to meet each other at the ends with permeability on strip-like sterilizing paper the long side of which is the same as the width of the non-permeable films, and side edge portions of the sterilizing paper are fixed to the two non-permeable films. The longer one of the non-permeable films is bent so as to have an approximately J-shaped cross section and to cause the two non-permeable films to face each other. The side edge portions thereof are fixed so as to form the sterilizing bag. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a medical device, a medical product, a microbiological test device, a food container, and an ethylene oxide gas sterilization bag, a sterilization package, and a method for manufacturing the same.

  Conventionally, an ethylene oxide gas (hereinafter referred to as “EOG”) sterilization bag having a ventilation portion in a part of the bag is known as a sterilization bag used for a packaging bag for storing medical instruments and the like. This sterilization bag contains a medical instrument such as a syringe, and the opening is sealed by heat sealing to form a package, which is subjected to gas replacement and deaeration treatment using EOG in the sterilization kettle. By substituting EOG gas for sterilization.

  Here, as a member of the ventilation portion of the sterilization bag, so-called sterilized paper having a function of preventing passage of microorganisms is generally used, but this sterilized paper is very expensive.

  Therefore, as a bag for EOG sterilization that reduces the amount of sterilized paper used and is excellent in cost, at least a part of a substantially cylindrical body formed by folding a non-breathable material whose inner surface is thermally adhesive into a U shape. A sterilization bag is proposed in which strip-shaped sterilized paper is heat sealed, a perforation or a needle hole is provided as a ventilation portion, and a predetermined edge of the substantially cylindrical body is thermally bonded. (For example, refer to Patent Document 1).

  FIG. 13 shows a schematic view of a sterilization package comprising a conventional sterilization bag. Here, (a) is a plan view and (b) is a cross-sectional view of the portion indicated by the line DD in FIG. 13 (a).

A conventional sterilization bag is prepared as follows. First, the non-breathable film is wound in a roll shape, and then the non-breathable film is drawn into a strip shape, and the perforations or needle holes are continuously non-breathable in the longitudinal direction. A strip of sterilized paper is applied to the inner surface of the non-breathable film so as to close the hole, and both ends of the sterilized paper are fixed to the inner surface of the non-breathable film by vertical heat sealing. Bend at the center line in the longitudinal direction, overlap the both ends of the non-breathable film and apply vertical heat seal, and further form a peripheral heat seal part parallel to the width direction by horizontal heat seal, then provide a notch and cut Use sterilization packaging bags.
Thereafter, the sterilization bag is set in a packaging machine, and after the contents are stored, the opening is heat-sealed to provide a hermetic heat-sealing portion to obtain a sterilization package.

Japanese Utility Model Publication No. 57-63081

  However, in the conventional sterilization packaging body, since the opening area of each ventilation hole is small, it is necessary to provide a large number of perforations or needle holes in the longitudinal direction of the sterilization bag in order to ensure the ventilation amount of the packaging body. Therefore, the strip-shaped sterilized paper must also be arranged in the longitudinal direction of the sterilization bag. As a result, the amount of expensive sterilized paper used is increased, resulting in a cost problem.

Here, if the number of perforations and needle holes is increased, the total opening area of the vent holes becomes large. However, when the packaging body expands rapidly, the perforations or portions where the needle holes are provided are not vented. Since the permeable film is easily torn and the sterilized paper is also damaged by this, the number of perforations or needle holes must be reduced. Although the number of holes can be increased to reduce the number, the sterilized paper is white, so foreign matter that enters through the holes and adheres to the sterilized paper is very noticeable, and there is a risk of popping out when opened. Therefore, it is not preferable to enlarge the hole.
For this reason, in the conventional sterilization package, it is difficult to adopt a method for increasing the number of perforations and needle holes and a method for enlarging each hole. For gas replacement in the EOG sterilization treatment, A long time is required, which leads to a decrease in efficiency of the EOG sterilization treatment.

  Moreover, it is common to provide the opening part of a bag body in a short side. The reason for this is that sealing heat sealing becomes easy, and when sealing and heat-sealing the opening of the bag body, allow space in the space around the sealing heat-sealing part, and the contents come into contact with the heat-seal bar. This is because if the opening is provided on the long side, the bag must be made large, resulting in a cost problem.

  Therefore, similarly, in the sterilization bag, the opening is provided on the short side of the sterilization bag. In this case, in the conventional sterilization bag, sterilization paper is sandwiched and hermetically sealed and heat sealed. It becomes.

  Here, if it is a bag making machine, even if heat sealing is performed by sandwiching sterilized paper, the film constituting the bag body can be heat sealed or cooled in a state where tension is applied, so heat sealing is performed. However, in the packaging machine, there is almost no tension applied to the sealed heat seal part, and it is very difficult to heat seal by sandwiching sterilized paper having a very low hot heat seal strength.

On the other hand, in a packaging machine, it is difficult to provide a mechanism for cooling the heat seal part because of slack or shrinkage that occurs in the heat seal part.
Therefore, when heat-sealing the opening with a packaging machine, it must be heat-sealed at as high a temperature as possible, so that the film of the sealed heat-sealed part is easily damaged, and the package body is damaged by rapid decompression during sterilization. When inflated, the conventional sterilization packaging body is easily broken at the sealed heat-sealed portion and very difficult to avoid for the above reasons.

  The present invention has been made in view of the above circumstances, can be sealed and heat sealed without sandwiching sterilized paper in a packaging machine, can maintain a sufficient amount of ventilation, and is exposed to rapid decompression. Is a sterilization bag capable of forming a sterilization package that is difficult to break, and the sterilization bag, the sterilization package, which are excellent in cost by reducing the amount of sterilized paper used for each bag, and The object is to provide a manufacturing method thereof.

  The invention according to claim 1 of the present invention is a sterilization bag made of a non-breathable film and sterilized paper, and has an end portion of two rectangular non-breathable films having the same width and different lengths. On the same strip-shaped sterilized paper having the same width as the non-breathable film, the two sheets of non-breathable film are laid on the side edges of the sterilized paper with the breathability. It is fixed, and the longer one of the non-breathable films is folded into a substantially J-shaped cross section so that the two non-breathable films face each other, and the side edges are fixed to form a bag. This is a sterilization bag.

  The invention according to claim 2 of the present invention is that the non-breathable film is a non-breathable film formed by laminating a support base material layer and a heat-sealable resin layer at least on the inner surface side. The sterilization bag according to claim 1, characterized in that it is a feature.

  In the invention according to claim 3 of the present invention, the non-breathable film is a non-breathable film formed by laminating heat-sealable resin layers that can be heat-sealed to each other on both sides of the support base material layer. The sterilization bag according to claim 2, wherein

  Moreover, the invention according to claim 4 of the present invention is an aspect in which, in the sterilization bag, the fixing part on the long side of the sterilized paper is bridged, and the bag breaking prevention heat seal part is formed in at least one place. The sterilization bag according to claim 2 or 3, wherein the bag is sterilized.

  Further, the invention according to claim 5 of the present invention is characterized in that, in the sterilization bag, a portion folded into a substantially J-shaped cross section is folded inside the sterilization bag to form a one-gusset bag. It is a sterilization bag in any one of Claims 1-4.

  In the invention according to claim 6 of the present invention, the inner dimension between the side edges of the sterilization bag is shorter than the dimension connecting the bottom and the opening of the sterilization bag, and the length of the sterilization paper is long. The side-side fixing part is located outside the circular region having the inside dimension between the side edges of the sterilization bag as a diameter from the center of the sterilization bag. The sterilization bag according to any one of the above.

  The invention according to claim 7 of the present invention is characterized in that the contents are stored in the sterilization bag according to any one of claims 1 to 6 and the opening of the sterilization bag is sealed. And a sterilization package.

  Further, the invention according to claim 8 of the present invention is a method for producing a sterilization bag comprising a non-breathable film and sterilized paper, and a strip-like non-breathable film comprising a support base material layer and a heat-sealable resin layer, Folded in parallel with the longitudinal direction at two positions with different distances from the center in the width direction so that the heat-sealable resin layer is on the inner surface side, and both ends are overlapped with air permeability, or Combined palms into a substantially cylindrical shape, apply narrow band-shaped sterilized paper on the inner surface side of the overlapped part or the palmed joint part, both side edges in the longitudinal direction of the sterilized paper, and the inner surface of the non-breathable film The sterilization paper is fixed to the non-breathable film by continuously heat-sealing, and the non-breathable film is heat-sealed parallel to the width direction at regular intervals, Form a peripheral heat seal Thereafter, one of the two bent portions of the non-breathable film is cut in the longitudinal direction to form an opening of the sterilization bag, and a peripheral heat seal portion provided on the non-breathable film is further provided. A method for producing a sterilization bag, wherein the sterilization bag is produced by cutting in the width direction.

  Further, the invention according to claim 9 of the present invention is the method for manufacturing a sterilization bag, wherein both the side edges in the longitudinal direction of the sterilized paper and the inner surface of the air-impermeable film are continuously heat-sealed. When fixing the sterilized paper to the non-breathable film, in addition to bridging between the heat seals at both side edges in the longitudinal direction of the sterilized paper, the non-breathable film is heat sealed to prevent bag breaking The method for producing a sterilization bag according to claim 8, wherein the heat seal part is formed at least at one place.

  The invention according to claim 10 of the present invention is the method for producing a sterilization bag, wherein the non-breathable film is formed by laminating heat-sealable resin layers heat-sealable on both sides of a support base material layer. The sterilization bag manufacturing method according to claim 9, wherein the sterilization bag is a non-breathable film.

  Further, the invention according to claim 11 of the present invention is the method for producing a sterilization bag, wherein the non-breathable film is folded and overlapped at both ends or joined together to form a substantially cylindrical shape, and then a disc shape. The sterilization bag manufacturing method according to claim 7, wherein the rotating plate is applied to one of the bent portions to form a gusset portion.

  In the sterilization bag according to the present invention, the non-breathable film is overlapped on the sterilized paper or the palms are joined together, so that the sterilization bag is placed between the sterilized paper and the non-breathable film as compared with the conventional sterilization bag. Despite the fact that foreign matter is less likely to penetrate and the amount of sterilized paper used is small, the opening area for ventilation becomes very large. Therefore, the sterilization package manufactured from the sterilization bag according to the present invention can take a large amount of airflow while maintaining the effect of preventing the intrusion of foreign matter, and can be extremely expanded even when exposed to a rapid decompression during EOG sterilization. Doing so is suppressed, and it has the effect of making it difficult to break the bag. And since there is little usage-amount of the sterilization paper for every bag, it is excellent also in terms of cost.

  Further, in the sterilization bag according to the present invention, since it can be sealed and heat sealed without sandwiching sterilized paper in the packaging machine, a high temperature heat seal like a conventional sterilization bag is unnecessary, and a non-breathable film Damage is unlikely to occur. Therefore, the sterilization package manufactured from the sterilization bag according to the present invention can prevent a problem that the sealed heat seal part breaks the bag during EOG sterilization.

  In the sterilization bag according to the present invention, since the sterilized paper is not exposed on the surface, the sterilized paper is hardly contaminated by contact with other substances or liquids, and is excellent in hygiene.

  Furthermore, if the bag-breaking prevention heat seal is provided in the sterilization bag according to the present invention, it is possible to prevent the sterilization paper from being damaged by the expansion of the sterilization package manufactured from the sterilization bag according to the present invention. .

  Furthermore, the sterilization bag according to the present invention can be accommodated for storing larger contents by making it a one-piece gusset bag, and can also provide independence.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic view showing an example of a first embodiment of a sterilization bag according to the present invention, (a) is a plan view, and (b) is taken along line AA in FIG. 1 (a). It is sectional drawing.
The sterilization bag 1 of the present invention in the first embodiment can take a large ventilation area while preventing the intrusion of foreign matter by superimposing the non-breathable film 2 on the sterilized paper 5 without sealing. A sterilization bag that can be used.

  As shown in FIGS. 1 (a) and 1 (b), in the sterilization bag 1, the non-breathable film 2 is folded at the folding portion 3, and the non-breathable films 2 are formed at the overlapping portion 4. It overlaps without being sealed, and both side edges of the bag are heat-sealed by the peripheral heat seal part 7, and an opening 9 is provided on the side opposite to the bent part 3, and the peripheral heat near the opening 9 A notch 8 is provided in the seal portion 7.

  Inside the sterilization bag 1, both side edges on the long side of the strip-shaped sterilized paper 5 are fixed to the non-breathable film 2 by heat sealing at the fixed heat seal portions 6a and 6b.

  If the width at which the non-breathable films 2 overlap in the overlapping portion 4 is too narrow, foreign matter is likely to enter, and if it is too wide, a sufficient amount of ventilation cannot be obtained. Therefore, the overlapping width is determined in consideration of the size of the sterilization bag 1, the width of the ventilation portion of the sterilized paper 5, the flexibility of the non-breathable film 2, the decompression speed during sterilization, etc. Is formed in the range of 3 mm to 25 mm, preferably 5 mm to 15 mm.

  The wider the distance between the fixed heat seal portions 6a and 6b of the sterilized paper 5, the greater the air flow rate and the more resistant to sudden pressure reduction during EOG sterilization. It is determined in consideration of the internal volume of the sterilization bag 1 and the decompression speed. Usually, it is formed with 5 mm to 40 mm, preferably 10 mm to 20 mm.

  The widths of the fixed heat seal portions 6a and 6b depend on the heat seal strength between the sterilized paper 5 and the non-breathable film 2, but are usually 2 mm to 20 mm, preferably 4 mm to 10 mm. The widths of the center-side fixed heat seal portion 6a and the end-side fixed heat seal portion 6b may not be the same, but considering the appearance and the balance of pressure during heat sealing, the width is the same. Is preferred.

Examples of the heat sealing method include a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, and an ultrasonic seal.
In the sterilization bag 1 according to the present invention, the adhesive strength between the heat-sealed surface of the non-breathable film 2 and the sterilized paper 5 is 3N / 15 mm or more. Is preferable because it is difficult to occur.

  The width of the peripheral heat seal part 7 is usually in the range of 3 mm to 15 mm, preferably 6 mm to 12 mm, from the balance of strength retention and content storage. The width of the heat seal indicates not only the width of the solid seal but also includes the outer dimension of one heat seal portion formed by a plurality of line seals. In particular, when the heat seal strength between the sterilized paper 5 and the non-breathable film 2 is low, the sterilized paper 5 and the non-breathable film 2 are formed by forming the heat seal portion with a plurality of line seals and increasing the heat seal pressure. This is useful for improving the heat sealability of the sterilized paper 5 and preventing the sterilized paper 5 from being unsealed at the end where the sterilized paper 5 is sandwiched and heat sealed.

FIG. 2 is a schematic view showing an example of a sterilization package in which contents are stored in the sterilization bag and hermetically sealed.
As shown in FIG. 2, the sterilization package 30 according to the present invention stores the contents M from the opening 9 in the sterilization bag 1 according to the present invention, and then heat-seals the vicinity of the opening 9 to seal heat. It is formed by providing the seal portion 12.

  The sterilization bag 1 according to the present invention allows gas to enter and exit from the entire unsealed portion of the overlapping portion 4. Therefore, the sterilization packaging body 30 formed from the sterilization bag 1 can obtain a sufficient amount of ventilation even in a rapid decompression process during EOG sterilization, and the expansion of the packaging body is unlikely to occur. The effect is difficult.

  Moreover, since the ventilation | gas_flowing part of the sterilization paper 5 is covered with the overlap part 7, the effect that the foreign material cannot adhere to the sterilization paper 5 easily is acquired, and it is preferable on hygiene.

  Furthermore, in the sterilization package 30 according to the present invention, the sealed heat seal part 12 is heat-sealed between the non-breathable films 2, so that the sealed heat seal part 12 is provided by sandwiching the sterilized paper 5. Compared with the bag 32, heat sealing can be easily performed, and the sealed heat sealing part 12 excellent in terms of bag breaking strength can be formed.

  Further, the center-side fixed heat seal portion 6a is disposed on the side closer to the bent portion 3 than the center line 51, which is shown by a one-dot chain line in FIG. 1 and shows the middle between the opening 9 and the bent portion 3 of the sterilization bag. Thus, even if the sterilization package 30 including the sterilization bag 1 expands due to a rapid decompression process during sterilization, the center-fixed heat seal portion 6a passes through the center point that receives the force of the bag breaking most due to the expansion. Since it is located closer to the end than the center line 51, bag breakage at the portion of the sterilized paper 5 can be further suppressed, which is preferable.

  Further, a center-fixed heat seal portion 6a is disposed outside a circle 52 having the center of the circle as the center of the sterilization bag 1 shown in FIG. This is more preferable because the bag breaking strength is further increased.

  In this case, the inner dimension between the peripheral heat seal portions 7 is inevitably shorter than the length from the opening 9 to the bent portion 3 of the peripheral heat seal portion 7.

  This means that the length of the strip-shaped sterilized paper 5 in the longitudinal direction can be small, and the sterilization bag 1 according to the present invention is compared to the vertical sterilization bag used in the conventional sterilization package 32. Can reduce the amount of sterilized paper 5 used.

Further, in this case, the sterilization packaging body 30 according to the present invention has a shorter distance between the notches 8 than the conventional sterilization packaging body 32, and is easily sealed from the notches 8 when the contents M are opened by opening. The portion on the heat seal portion 12 side can be cut off, and it becomes difficult to tear the sterilized paper 5 by mistake, and the possibility that the contents M suffer from contamination due to scattering of fibers from the damaged sterilized paper 5 is reduced. It becomes hygienic.
Further, although not particularly illustrated, the position at which the sterilizing paper 5 is disposed may be closer to the opening 9 than the center of the sterilization bag 1. Also in this case, the above-described effects can be achieved by the positional relationship with the center of the sterilization bag 1.

(Second Embodiment)
FIG. 3 is a schematic view showing an example of a second embodiment of the sterilization bag according to the present invention, (a) is a plan view, and (b) is taken along line BB in FIG. 3 (a). It is sectional drawing.
In the sterilization bag according to the present invention in the second embodiment, both end portions of the non-breathable film 2 overlapped in the first embodiment are made to be in a palm-to-grind.

  As shown in FIGS. 3A and 3B, in this embodiment, the non-breathable film 2 is bent at the bent portion 3, and the non-breathable films 2 are hermetically sealed at the jointing portion 10. Without overlapping, and both edges are heat-sealed by the peripheral heat seal part 7, and an opening 9 is provided on the side opposite to the bent part 3. A notch 8 is provided in the heat seal portion 7.

Inside the sterilization bag 1, both ends on the long side of the strip-shaped sterilized paper 5 are fixed to the non-breathable film 2 by heat sealing at the fixed heat seal portions 6a and 6b.
If the width at which the non-breathable films 2 overlap in the palm-joining portion 10 is too narrow, foreign matter can easily enter, and if it is too wide, a sufficient amount of ventilation cannot be obtained. Therefore, the overlapping width is determined in consideration of the size of the sterilization bag 1, the width of the ventilation portion of the sterilized paper 5, the flexibility of the non-breathable film 2, the decompression speed during sterilization, etc. Usually, it is formed in the range of 3 mm to 25 mm, preferably 5 mm to 15 mm.

FIG. 4 is a schematic view showing an example of a sterilization package in which the contents are housed in the sterilization bag and hermetically sealed.
As shown in FIG. 4, the sterilization package 30 in the present embodiment is formed by providing a sealed heat seal portion 12 in the sterilization bag 1 of the present embodiment, as in the first embodiment.

  The sterilization packaging body 30 formed as described above allows gas to enter and exit from the entire unsealed portion of the palm joint portion 10. Therefore, a sufficient amount of aeration can be obtained even in a rapid decompression process during EOG sterilization, and the package is less likely to swell, and therefore it is difficult to break the bag.

Moreover, since the ventilation | gas_flowing part of the sterilization paper 5 is covered with the palm joint part 10, the effect that the foreign material cannot adhere to the sterilization paper 5 is acquired easily, and it is preferable on hygiene.
In addition, regarding the sealing heat seal and the like, the sterilization bag and the sterilization package of the present embodiment have the same effects as those of the first embodiment.

(Third embodiment)
FIG. 5 is a schematic view showing an example of the third embodiment of the sterilization bag according to the present invention. FIG. 5A is a schematic view of the overlapping portion 4 in the first embodiment of the sterilization bag according to the present invention. It is the schematic which shows the example which provided the bag breakage prevention heat seal part 11 in the aspect bridge | crosslinked between fixed heat seal part 6a, 6b, and (b) is the bag breakage prevention heat seal part 11 similarly. It is the schematic which shows the example which provided in several places. FIG. 6 is a schematic view showing an example of a sterilization package in which the contents are stored in the sterilization bag shown in FIG. 5 and sealed and heat-sealed, and FIG. And FIG. 6B corresponds to FIG. 5B.

  The third embodiment of the sterilization bag according to the present invention is the same as that described above in the second embodiment of the sterilization bag according to the present invention, in the same manner as described above. It can also be implemented by providing the prevention heat seal part 11.

  The number and interval of the heat-seal parts 11 for preventing bag breaking are the size of the sterilization bag 1, the vertical and horizontal dimensional ratio of the sterilization bag 1, the width of the ventilation portion of the sterilization paper 5, and the flexibility of the non-breathable film 2 It is determined in consideration of the heat seal strength between the sterilized paper 5 and the non-breathable film 2, the heat seal strength of the bag seal prevention heat seal portion 11, the pressure reduction speed during sterilization, and the like.

  If the width of the heat-seal part 11 for preventing bag breaking is too narrow, it becomes difficult to control the heat-seal conditions, and there is a risk that a seal failure may occur suddenly. If it is too wide, the sterilized paper 5 is blocked by that amount, which is useless. Therefore, it is usually formed in a range of 3 mm to 15 mm, preferably 5 mm to 8 mm.

In the third embodiment of the sterilization bag according to the present invention, the sterilized paper 5 and the non-breathable film 2 are heat-sealed by the bag-breaking prevention heat-sealing part 11, and the amount of air flow decreases accordingly. However, by providing the heat-seal part 11 for preventing bag breaking, the sterilized paper 5 fixed on the inner side of the overlapping part 4 or the jointing part 10 is expanded with the expansion of the sterilization package during EOG sterilization. Can be prevented.
Therefore, if the sterilization bag according to the present embodiment is used, the sterilization package is more difficult to break, and even if a sudden decompression is applied to reduce the time required for the EOG sterilization process, the operation can be performed with peace of mind. You can do it.

(Fourth embodiment)
FIG. 7 is a schematic view showing an example of a fourth embodiment of a sterilization bag according to the present invention. Here, (a) is a schematic plan view of a form in which both end portions of the non-breathable film 2 are overlapped or joined together, and (b) is a cross-sectional view taken along the line CC in FIG. 7 (a). FIG. 7C is a cross-sectional view taken along the line CC in FIG. 7A, and the both end portions of the non-breathable film 2 are overlapped. Shows the form of the joints.

  FIG. 8 is a schematic view showing an example of a sterilization package in which the contents are stored in the sterilization bag and hermetically sealed.

  The sterilization bag 1 according to the present invention in the fourth embodiment is formed by folding the sterilization bag folding portion 3 in the first or second embodiment inside the bag as shown in FIG. It is a single gusset bag. Although not specifically shown, even the sterilization bag 1 according to the third embodiment of the present invention can be similarly formed as a one-gusset bag.

  Although not particularly shown, the gusset folding part may be provided with a so-called ship bottom seal that obliquely heat-seals both ends of the gusset part, and a vertical heat seal part is provided at the bottom of the gusset to form a bottom seal part. You may do it.

  By using the one-piece gusset bag as described above, the sterilization bag 1 according to the present invention can also accommodate larger contents. In addition, it is possible to provide the sterilization bag 1 and the sterilization package 30 with self-supporting properties.

  Here, when manufacturing the sterilization packaging body 30 using the sterilization bag 1 having the one-gazette shape according to the present invention, since the gusset portion does not exist in the opening 9, the sealed heat seal portion 12 is formed. The sterilization package 30 with good sealing properties can be easily manufactured.

  However, in the sterilization bag used in the conventional sterilization packaging body 32, since the gusset portion exists in the opening, the presence of the sterilized paper 5 is added, and the formation of the sealed heat seal portion 12 is very difficult. It will be accompanied.

(Non-breathable film)
FIG. 9 is a cross-sectional view showing an example of a laminated structure of a non-breathable film constituting the sterilization bag according to the present invention, where (a) shows a two-layer structure and (b) shows a three-layer structure.

  The non-breathable film 2 needs to be made of a material that can be EOG sterilized, and also has a heat seal function for forming a bag and a package. In order to provide these functions, the non-breathable film 2 is basically a laminate in which a support base material layer 40 and a heat-sealable resin layer 41 are sequentially laminated from the outside as shown in FIG. 9 (a). The configuration.

The support base layer 40 may be, for example, a single support base made of a film or sheet such as polyamide resin, polyester resin, low density polyethylene resin, medium density polyethylene resin, high density polyethylene resin, polypropylene resin, cellophane, Or the composite support base material etc. which combine 2 or more types of support base materials may be sufficient.
The thickness of the support base material layer 40 is about 5 to 100 μm, preferably about 12 to 50 μm.

  In the present invention, for example, a desired print pattern such as a character, a figure, a symbol, a pattern, and a pattern is necessary for offset printing, gravure printing, flexographic printing, letterpress printing, silk screen printing, and other ordinary printing methods. Depending on, it may be printed on one side of the support base material layer 40.

  The heat-sealable resin layer 41 is made of a material that can be subjected to EOG sterilization, and can reliably heat-seal the peripheral heat seal part 7 of the sterilization bag 1 and the sealed heat seal part 12 of the sterilization package 30. Any material that can be heat-sealed with the paper 5 may be used.

As a film material used for the heat-sealable resin layer 41, a so-called easy peel sealant film in which the heat-seal between the surfaces of the heat-sealable resin layer 41 becomes a weak seal, or heat between the surfaces of the heat-sealable resin layer 41 is used. A polyethylene film, a polypropylene film, an ionomer film, an ethylene-vinyl acetate copolymer film, or the like that makes a strong seal can be used.
The thickness of the heat-sealable resin layer 41 is preferably about 10 to 80 μm.

  Here, in the case of a mode in which both ends of the non-breathable film 2 shown in the second embodiment of the sterilization bag according to the present invention are joined together, if the joining unit 10 is heat-sealed, the joined surface is joined. Since the heat-sealable resin layers 41 are heat-sealed, it is possible to form the bag-breaking-preventing heat-seal portion 11 in the third embodiment without breaks.

  In addition, as shown in FIG. 9B, the non-breathable film 2 according to the present invention sequentially includes a heat sealable resin layer 41, a support base material layer 40, and a heat sealable resin layer 41 from the outside. It is good also as a laminated body to laminate.

  If the overlapping portion 4 shown in the first embodiment of the sterilization bag according to the present invention is heat-sealed using the three-layer structure of the non-breathable film 2, Since the inner and outer heat-sealable resin layers 41 are heat-sealed, the bag-breaking prevention heat-seal portion 11 in the third embodiment can be formed without a break.

  In addition, the air-impermeable film 2 according to the present invention is not limited to the above-described layer configuration, and although not illustrated, for example, a printed layer may be formed on one side of the support base material layer 40. An intermediate layer such as an adhesive layer or a pinhole-resistant layer can be provided between the layer 40 and the heat-sealable resin layer 41 as necessary.

  In addition, additives such as lubricants, antioxidants, and antistatic agents may be added to the resin that forms each layer of the non-breathable film 2 according to the present invention as long as the object of the present invention is not impaired. Can do.

  As a method of laminating the support base material layer 40 and the heat-sealable resin layer 41 of the non-breathable film 2 according to the present invention, it may be laminated by a T-die extrusion lamination method using a heat-adhesive resin, It may be laminated by a dry laminating method using a two-component curable urethane adhesive, or a multilayer film by coextrusion may be used. In the case of the T-die extrusion lamination method, an anchor coating agent can be used as necessary.

(Sterilized paper)
In the present invention, as the sterilized paper 5 made of a breathable material that does not allow passage of bacteria, for example, those made of uncoated paper, non-woven fabric, Japanese paper or the like can be used.
And as said nonwoven fabric, Tyvek (made by DuPont Japan Limited), Luxer (made by Asahi Kasei Kogyo Co., Ltd.), etc. can be used, for example.

  In addition, polyethylene, polypropylene such as non-woven fabric, Japanese paper, etc. with holes perforated, Nippon Oil Co., Ltd. Nisseki Warif, Kurashiki Boseki Co., Ltd., Shin Nippon Sof Co., Ltd., Sofcross, etc. What laminated | stacked the net-shaped reinforcement which consists of etc. can be used.

  The above-mentioned sterilized paper 5 can change the aeration rate depending on the thickness and material, and therefore is appropriately selected in consideration of the temperature conditions during sterilization (for example, 50 to 70 ° C.) and the pressure reduction rate.

(Manufacturing method of sterilization bag according to first and second embodiments)
Although the manufacturing method of the sterilization bag 1 which concerns on this invention is not specifically limited, For example, it can manufacture using a general pillow bag making machine with a tape insertion mechanism.
FIG. 10 is a schematic view showing an example of the bag making machine, where (a) is a plan view and (b) is a side view.

  First, as shown in FIGS. 10A and 10B, the non-breathable film 2 and the sterilized paper 5 are loaded into the bag making machine 20 in a wound state, and each is drawn out in a band shape. In addition, the dimension of the width direction of the strip | belt-shaped sterilization paper 5 is a thing smaller than the dimension of the width direction of the said strip | belt-shaped non-breathable film.

  Here, the sterilized paper 5 and the bag making plate 21 are arranged so as to be shifted from the center in the width direction of the strip-shaped non-breathable film 2 to be pulled out toward the end. Although the shiftable dimensions differ depending on the bag making machine 20, it is usually possible to shift the positions of the sterilized paper 5 and the mounting jig for the bag making plate 21 with a simple modification.

  Subsequently, the drawn air-impermeable film 2 is bent at two locations along the bag-making plate 21 so that the heat-sealable resin layer 41 is on the inner surface side, and both ends are overlapped or joined together to form a substantially cylinder. The band-shaped sterilized paper 5 is disposed so as to pass between the bag-making plate 21 and the overlapping portion 4 or the palm-joining portion 10, and the sterilized paper 5 is inserted from the inside to the air-impermeable film 2. The fixed heat seal portions 6a and 6b are continuously heat sealed by the vertical heat seal bar 22.

  Thereafter, heat sealing is performed at regular intervals in parallel to the width direction of the substantially cylindrical non-breathable film 2 with the horizontal heat seal bar 23 to provide the peripheral heat seal portion 7, and the peripheral heat seal portion 7 has notches 8. A hole is opened with a punching jig 24.

  FIG. 11 shows the form of the non-breathable film 2 after the hole of the notch 8 is provided by the punching jig 24 in the manufacturing method. Here, the vertical direction of FIG. 11 is the longitudinal direction of the non-breathable film 2 drawn out in a strip shape.

  Thereafter, one side of the bent portion is cut off by the cutting portion 27 with the leather blade 25 to form the opening 9, and the air-impermeable film 2 is cut in the width direction at the center of the peripheral heat seal portion 7 by the cutting blade 26. Thus, the sterilization bag 1 is obtained.

  The sterilization bag 1 according to the present invention obtained by the manufacturing method can allow gas to enter and exit from the entire unsealed portion of the overlapping portion 4 or the jointing portion 10. Therefore, the sterilization package formed from the sterilization bag can obtain a sufficient amount of air flow even in a rapid decompression process during EOG sterilization, and the package does not easily expand, and is therefore difficult to break. There is an effect.

  Further, according to the method for manufacturing a sterilization bag according to the present invention, since the sterilization bag 1 can be made horizontally long with respect to the drawing direction of the band-shaped non-breathable film 2, the sterilized paper sandwiched continuously in the band shape. The size in the longitudinal direction for each of the five bags is also small, and the amount of sterilized paper 5 used for each bag can be further reduced as compared with the vertically long sterilization bag used for the sterilization packaging body 32. it can.

  Further, as described above, since the sterilization bag 1 can be made in a horizontally long bag, the amount of bag making per hour is increased as compared with the case of manufacturing a vertically long sterilization bag used for the conventional sterilization package 32. Also, the effect of improving the bag-making efficiency is achieved.

  This is because the normal bag making machine 20 has the same film configuration, and a rectangular bag of a specific size is produced in a vertically long form and in a horizontally long form, the heat sealing time is the same. However, since the film feed length per shot is longer in the longitudinal direction, as a result, the time required for feeding the film can be shorter in the lateral direction than in the longitudinal direction.

  In the manufacturing method, a bag making and packaging machine in which a packaging machine is coupled downstream of the bag making machine 20 can be used.

(Manufacturing method of sterilization bag according to the third embodiment)
The sterilization bag according to the third embodiment of the present invention can be manufactured, for example, by providing means for forming the bag breaking prevention heat seal portion 11 in addition to the manufacturing method.
As a normal means for forming the bag-breaking prevention heat seal portion 11, the vertical heat seal bar 22 is processed, and the heat seal in the horizontal direction is interposed between the two vertical heat seal portions for forming the fixing portions 6a and 6b. The most common method is to add parts.

  When heat sealing is performed with the vertical heat seal bar 22 as in the above-described method, there is no concern that the inner surfaces of the sterilization bags 1 are heat sealed because the bag-making plate 21 is located under the heat seal portion.

  On the other hand, in the case of carrying out the bag breaking prevention heat sealing with the horizontal heat seal bar 23 or the point seal, it is necessary to prevent the inner surfaces of the sterilization bags 1 from being heat sealed at the time of the heat sealing, which is difficult. become.

(Manufacturing method of the sterilization bag according to the fourth embodiment)
The sterilization bag according to the fourth embodiment of the present invention can be manufactured, for example, by providing means for forming a gusset portion in the manufacturing method. For example, after the two ends of the non-breathable film 2 are overlapped or joined with each other in the bag making machine 20, a gusset portion is formed by applying a disk-shaped rotating plate to the folding portion before the vertical heat sealing step. can do.

Next, the present invention will be described more specifically with reference to examples.
Example 1
A biaxially stretched polypropylene film (product name “FOR” manufactured by Futamura Chemical Co., Ltd.) having a thickness of 20 μm and a width of 760 mm is used as the supporting base material layer 40, and a polyethylene film having a thickness of 30 μm and a width of 760 mm is used as the heat-sealable resin layer 41. (Product name "L4102" manufactured by Toyobo Co., Ltd.) was prepared and laminated via a urethane resin-based two-component mixed laminating adhesive (amount applied: 3 g / m ² ), and then cut into small widths while cutting off both ends. A non-breathable film 2 having a width of 370 mm and a layer configuration of biaxially stretched polypropylene film (20 μm) / 2-component mixed laminate adhesive layer / polyethylene film (30 μm) was produced.

As sterilized paper 5, Tyvek 1073B (manufactured by DuPont) having a basis weight of 73 g / m ² and a width of 25 mm was prepared.

  Then, using the pillow bag making machine with a tape supply device as the bag making machine 20, the non-breathable film 2 obtained above is folded and wound along the bag making plate 21 for a bag making width of 180 mm to produce the bag making machine 20. The both sides of the non-breathable film 2 are overlapped with each other by 10 mm so that the position of 50 mm from the bent portion on the right side when viewed from the upstream side of the bag machine 20 is the center of the overlapping portion 4 and formed into a substantially cylindrical shape. Is passed between the bag-making plate 21 and the overlapping portion 4 so that the center of the overlapping portion 4 and the center of the sterilized paper 5 are aligned with each other on the inner surface side of the non-breathable film 2. As shown in a), the fixed heat seal portions 6a and 6b are continuously connected by a two-line vertical heat seal bar 22 so that the inner dimension (L1) between the fixed portions is 17 mm and the width (L2) is 5 mm. Heat-sealed .

  Thereafter, a peripheral heat seal portion 7 is provided at intervals of 40 mm by a horizontal heat seal bar 23 having a heat seal width of 20 mm, and a hole in the notch 8 is removed at a position 35 mm from the left bent end when viewed from the upstream side of the bag making machine 20. Opened with tool 24.

  Thereafter, an opening 9 is formed by cutting off one of the bent ends at a position 10 mm from the left bent end when viewed from the upstream side of the bag making machine 20 with the leather blade 25, and cutting is performed at substantially the center of the peripheral heat seal portion 7. Thus, a sterilization bag 1 having a length of 50 mm, a width of 170 mm, and a peripheral heat seal portion 7 of 10 mm in width was obtained.

(Example 2)
The non-breathable film 2, the sterilized paper 5, and the bag making machine 20 were the same as those in Example 1.
The non-breathable film 2 is folded and wrapped along a bag making plate 21 for a bag making width of 175 mm, and the non-breathable film 2 is placed at a position 45 mm from the right bent portion when viewed from the upstream side of the bag making machine 20. The polyethylene film surfaces are aligned with each other at 11 mm from the left end and 9 mm from the right end of the non-breathable film 2 when viewed from the upstream side of the bag making machine 20, and the alignment unit 10 is tilted to the right side to form a substantially cylindrical shape. The sterilized paper 5 is passed between the bag making plate 21 and the jointing unit 10 so that the center of the sterilized paper 5 is 50 mm from the right side when viewed from the upstream side of the bag making machine 20 and is not ventilated. As shown in FIG. 12 (a), the fixed heat seal portions 6a and 6b are applied to the inner surface side of the adhesive film 2 so that the inner dimension (L1) between the fixed portions is 17 mm and the width (L2) is 5 mm. Two lines After heat-sealing continuously with the heat-seal bar 22, the peripheral heat-seal part 9 is provided at intervals of 40 mm by the horizontal heat-seal bar 23 having a heat-seal width of 20 mm, and the left side is bent when viewed from the upstream side of the bag making machine 20. A hole of the notch 8 was punched with a jig 24 at a position 30 mm from the end.

  Thereafter, an opening 9 is formed by cutting off one end of the bent end at a position 5 mm from the left bent end as viewed from the upstream side of the bag making machine 20 with the leather blade 25, and cutting is performed at substantially the center of the peripheral heat seal portion 7. Thus, a sterilization bag 1 having a length of 50 mm, a width of 170 mm, and a peripheral heat seal portion 7 of 10 mm in width was obtained.

(Example 3)
As shown in FIG. 12 (b), a fixed heat seal is formed by using a vertical heat seal bar 22 in which a horizontal heat seal portion is added between two vertical heat seal portions for forming the fixed heat seal portions 6a and 6b. In the form of bridging between the parts 6a and 6b, the bag-breaking prevention heat seal part 11 having one place is provided under the same conditions as in Example 2 except that the bag-breaking prevention heat seal part 11 having a width (L3) of 5 mm is formed. A sterilization bag 1 having a length of 50 mm, a width of 170 mm, and a peripheral heat seal part 7 having a width of 10 mm was produced.

Example 4
A biaxially stretched polyethylene terephthalate film (product name “E5202” manufactured by Toyobo Co., Ltd.) having a thickness of 25 μm and a width of 760 mm is used as the supporting base material layer 40, and a molten polyethylene resin having a thickness of 20 μm is used as the heat-sealable resin layer 41. Then, both layers of the biaxially stretched polyethylene terephthalate film were laminated by extrusion lamination via an anchor coating agent, and then cut into small widths while cutting off both ends. The width was 370 mm and the layer structure was a polyethylene film (20 μm) / anchor coating agent / A non-breathable film 2 to be a biaxially stretched polyethylene terephthalate film (25 μm) / anchor coating agent / polyethylene film (20 μm) was produced.

  And by using the same vertical heat seal bar 22 as in Example 3 and making bags under the same conditions as in Example 1, the overlapping part 4 has one bag-breaking prevention heat seal part 11 in a 50 mm length, A sterilization bag 1 having a width of 170 mm and a peripheral heat seal portion 7 having a width of 10 mm was produced.

(Example 5)
A bag-break-preventing heat seal is formed in the palm-joining portion 10 by making a bag in the same manner as in Example 2 except that the same non-breathable film 2 as in Example 4 and the same vertical heat seal bar 22 as in Example 3 are used. A sterilization bag 1 having one part 11 and having a length of 50 mm, a width of 170 mm, and a peripheral heat seal part 7 having a width of 10 mm was produced.

(Example 6)
A non-breathable film 2 having the same laminated structure as in Example 4 and using the non-breathable film 2 having a width of 420 mm and the same vertical heat seal bar 22 as in Example 3, in addition to a normal one-piece gusset folding process Is made in the same manner as in Example 2 to have one bag seal preventing heat seal portion 11 in the palm-joining portion 10, 50 mm long, 170 mm wide, 25 mm width of the gusset portion, and the width of the peripheral heat seal portion 9. A sterilization bag 1 having a 10-mm gusset shape was produced.

(Example 7)
In the sterilization bag 1 obtained in the above Examples 1 to 6, 10 ml of an empty polypropylene syringe is stored as the contents M, and an impulse sealer (FA-450 manufactured by Fuji Impulse Co., Ltd.) is placed at a position 5 mm from the opening 9. -5W), a sealed heat seal portion 12 having a seal width of 5 mm was provided for 1.0 second with heating and 1.3 seconds with cooling to produce a sterilization package 30.

(Example 8)
After putting the sterilization packaging body 30 according to the present invention obtained by the above production method into an EOG indicator (manufactured by ATI), vacuum pressure -85 kPa, sterilization temperature 60 ° C., sterilization time 2 hours, humidity 70%, When sterilization was performed under the conditions of sterilization pressure -35 kPa and 6 washings, the sterilization package 30 was not broken during sterilization.

It is the schematic which shows an example of 1st Embodiment of the bag for sterilization concerning this invention, (a) is a top view, (b) is sectional drawing in the AA of FIG. 1 (a). . It is the schematic which shows an example of 1st Embodiment of the packaging body for sterilization concerning this invention. It is the schematic which shows an example of 2nd Embodiment of the sterilization bag which concerns on this invention, (a) is a top view, (b) is sectional drawing in the BB line of Fig.3 (a). . It is the schematic which shows an example of 2nd Embodiment of the packaging body for sterilization concerning this invention. It is the schematic which shows an example of 3rd Embodiment of the bag for sterilization which concerns on this invention, (a) is the schematic of the example which provided the bag sealing prevention heat seal part in one place, (b) is bag breaking It is the schematic of the example which provided the prevention heat seal part in multiple places. It is the schematic which shows an example of 3rd Embodiment of the packaging body for sterilization which concerns on this invention, (a) is the schematic of the example which provided one bag-breaking prevention heat seal part, (b) is broken It is the schematic of the example which provided the bag prevention heat seal part in multiple places. It is the schematic which shows the example of 4th Embodiment of the bag for sterilization concerning this invention, (a) is a top view, (b) is sectional drawing which shows an example of this embodiment, (c) FIG. 6 is a cross-sectional view showing another example. It is the schematic which shows an example of 4th Embodiment of the sterilization packaging body which concerns on this invention. It is sectional drawing which shows an example of the non-breathable film which comprises the bag for sterilization concerning this invention, (a) is sectional drawing of 2 layer structure, (b) is sectional drawing of 3 layer structure. It is the schematic which shows an example of the bag making machine which manufactures the bag for sterilization concerning this invention, (a) is a top view, (b) is a side view. It is a figure which shows the example which processed the non-breathable film which comprises the bag for sterilization based on this invention with the bag making machine shown in FIG. It is a figure which shows each dimension of the fixed heat seal part of the sterilization bag which concerns on this invention. It is the schematic of the sterilization packaging body which consists of the conventional sterilization bag, (a) is a top view, (b) is sectional drawing in the DD line | wire of Fig.13 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sterilization bag 2 Air-impermeable film 3 Bending part 4 Overlay part 5 Sterilized paper 6a Centering fixed heat seal part 6b Edge fixed heat seal part 7 Peripheral heat seal part 8 Notch 9 Opening part 10 Palm joint part 11 Bag breaking Prevention heat seal part 12 Seal heat seal part 20 Bag making machine 21 Bag making plate 22 Vertical heat seal bar 23 Horizontal heat seal bar 24 Extraction jig 25 Leather blade 26 Cutting blade 27 Cutting part 28 Cutting part 30 Sterilization packaging body 40 Support Base material layer 41 Heat-sealable resin layer 51 Center line 52 yen M Contents

Claims (11)

  In a sterilization bag made of a non-breathable film and sterilized paper, the end of two rectangular non-breathable films having the same width and different lengths are strips whose long sides are the same as the width of the non-breathable film. On the sterilized paper sheet, the air-permeable sterilized paper is superposed or overlapped, and the side edges of the sterilized paper are fixed to the two air-impermeable films. A bag for sterilization characterized in that one of the above is folded into a substantially J-shaped cross section, two non-breathable films are made to face each other, and the side edges are fixed to form a bag.   The sterilization bag according to claim 1, wherein the non-breathable film is a non-breathable film formed by laminating a supporting base material layer and a heat-sealable resin layer at least on the inner surface side. .   The sterilization film according to claim 2, wherein the non-breathable film is a non-breathable film formed by laminating heat-sealable resin layers that can be heat-sealed to each other on both sides of a support base material layer. bag.   In the sterilization bag, the bag sealing prevention heat seal part is formed in at least one place in a mode of bridging between the fixed parts on the long side of the sterilized paper. The sterilization bag according to claim 3.   The sterilization bag according to any one of claims 1 to 4, wherein a portion folded into a substantially J-shaped cross section is folded inside the sterilization bag to form a one-gusset bag. bag.   The inner dimension between the side edges of the sterilization bag is shorter than the dimension connecting the bottom and the opening of the sterilization bag, and the fixed part on the long side of the sterilization paper is the center of the sterilization bag. The sterilization bag according to any one of claims 1 to 5, wherein the sterilization bag is located outside a circular region having an inner dimension between side edges of the sterilization bag as a diameter.   A sterilization package comprising: a sterilization bag according to any one of claims 1 to 6; and the contents of the sterilization bag are sealed and an opening of the sterilization bag is sealed.   In the method for producing a sterilization bag composed of a non-breathable film and sterilized paper, a strip-shaped non-breathable film composed of a support base layer and a heat-sealable resin layer, so that the heat-sealable resin layer is on the inner surface side, The overlapping portion is bent at two positions with different distances from the center in the width direction in parallel with the longitudinal direction, and both end portions are overlapped with air permeability or joined together to form a substantially cylindrical shape. Alternatively, narrow band-shaped sterilized paper is applied to the inner surface side of the joint-joining portion, and both the longitudinal edges of the sterilized paper and the inner surface of the non-breathable film are continuously heat-sealed to sterilize the paper. Is fixed to the non-breathable film, and the non-breathable film is heat-sealed parallel to the width direction at regular intervals to form a peripheral heat seal portion of the sterilization bag, and then the non-breathable film Two kinds of adhesive film One of the bent portions is cut in the longitudinal direction to form an opening of the sterilization bag, and a peripheral heat seal portion provided on the non-breathable film is further cut in the width direction so as to sterilize the sterilization bag. A method for producing a sterilization bag, comprising producing a bag.   In the manufacturing method of the sterilization bag, when both side edges in the longitudinal direction of the sterilized paper and the inner surface of the non-breathable film are heat-sealed continuously to fix the sterilized paper to the non-breathable film, Further, in a mode of bridging between the heat seals on both side edges in the longitudinal direction of the sterilized paper, the non-breathable film is heat sealed to form a bag breaking prevention heat seal part in at least one place. The method for producing a sterilization bag according to claim 8, wherein   In the method for producing a sterilization bag, the non-breathable film is a non-breathable film formed by laminating heat-sealable resin layers that can be heat-sealed to each other on both sides of a support base material layer. A method for producing a sterilization bag according to claim 9. In the manufacturing method of the sterilization bag, after folding the non-breathable film and overlapping both ends, or making a substantially cylindrical shape by joining together, a disk-shaped rotating plate is applied to one of the bent portions, The method for producing a sterilization bag according to any one of claims 8 to 10, wherein a gusset portion is formed.

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