JP4497826B2 - Bag forming substrate for forming an outer bag for an infusion bag - Google Patents

Description

【００２９】
【表２】

【００３０】
輸液バッグ用外装袋をこういった二重袋によって形成する場合、ガスバリア層は、少なくとも、内装シート側に設けておく必要があるが、引裂層は、内装シートまたは外装シートのいずれか一方側に設けておけばよく、内装シート及び外装シートの双方が引裂層を備えていてもよい。特に、実施例７〜１２のように、内装シート及び外装シートの双方に引裂層を設けておくと、内装シートまたは外装シートのいずれか一方側にだけ引裂層が設けられている場合に比べて、破断時の負荷が小さくなり、容易に破断することができると共に、直線引裂性も向上するという効果が得られる。
【００３１】
また、輸液バッグ用外装袋を二重袋によって形成する場合も、一重袋の場合と同様に、引裂層が備えている直線引裂性を最大限発揮させるためには、実施例６、８、１０、１２のように、シーラント層等を形成している無延伸フィルムに隣接した位置に引裂層を形成しておくことが望ましい。
【００３２】
また、引裂層は耐屈曲性が悪く、折り曲げによるピンホールが発生しやすいので、ガスバリア層に引裂層を積層しておくと、引裂層にピンホールが発生した場合、隣接するガスバリア層に対してピンホールの発生を誘発することになる。従って、内容物の保護という観点からは、実施例１〜３のように、引裂層をガスバリア層に直接積層しないようにしておくことが望ましい。
【図面の簡単な説明】
【図１】（ａ）はこの発明にかかる輸液バッグ用外装袋の一実施形態を示す平面図、（ｂ）は同上の輸液バッグ用外装袋に輸液バッグを密封包装した状態を示す平面図である。
【図２】同上の輸液バッグ用外装袋を形成している複層シートを示す断面図である。
【図３】この発明にかかる袋形成基材を示す平面図である。
【図４】同上の袋形成基材を製造するために使用される長尺帯状の複層シートを示す斜視図である。
【図５】（ａ）は同上の複層シートの折畳工程を示す平面図、（ｂ）は同上の折畳工程を示す側面図である。
【図６】（ａ）、（ｂ）は同上の複層シートのヒートシール工程を示す平面図である。
【図７】（ａ）は輸液バッグが密封包装された同上の輸液バッグ用外装袋を開封した状態を示す平面図、（ｂ）は一旦開封した同上の輸液バッグ用外装袋を再封した状態を示す平面図である。
【図８】従来の輸液バッグ用外装袋に輸液バッグを密封包装した状態を示す平面図である。
【図９】同上の輸液バッグ用外装袋を開封した状態を示す平面図である。
【符号の説明】
１ 輸液バッグ用外装袋
１ａ、１ｂ 切込
１０ 複層シート
１１ 基材層
１２ ガスバリア層
１３ 引裂層
１４ シーラント層
Ｂ 輸液バッグ
Ｃ 打抜刃
ＳＲ 縦シールローラ
ＳＢ 横シールバー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outer bag for an infusion bag for hermetically packaging an infusion bag and a bag forming substrate for forming the outer bag for the infusion bag.
[0002]
[Prior art]
For example, infusion bags used for infusions and the like are formed by a bag-like container made of a flexible sheet such as polypropylene or polyethylene or a flat blow container, and such an infusion bag has a gas barrier from a legal aspect. Since a multilayer container having a layer is not used, at present, as shown in FIG. 8, the infusion bag 50 is sealed and packaged together with an oxygen scavenger in an outer bag 60 formed of a multilayer sheet having a gas barrier layer. Are stored and transported.
[0003]
By the way, the infusion bag 50 as described above is subjected to a predetermined dispensing process according to the infusion, for example, injecting a vitamin preparation or the like before use. Dispensing processing must be performed in the hospital by qualified personnel such as doctors and nurses. When such an infusion bag 50 is used for home medical care, as shown in FIG. However, once the outer bag 60 is opened in the hospital, the infusion bag 50 is dispensed using a syringe or the like, and then the outer bag 60 is resealed, the infusion bag 50 is handed to the patient for administration. Until then, patients will be kept at home.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 6-77737 [Patent Document 2]
Japanese Utility Model Publication No. 7-11568 [0005]
[Problems to be solved by the invention]
In order to reseal the once opened outer bag 60, for example, the mouth portion of the opened outer bag 60 is sealed by welding using a welding jig or by being clamped with a stopper or the like. As shown in FIG. 9, the cut end of the opened outer bag 60 is usually meanderingly curved, so that a sufficient welding allowance and clamping allowance can be secured. However, there is a problem in that it is difficult to reliably reseal the mouth portion of the opened outer bag 60 over its entire width.
[0006]
Such a problem of re-sealing allowance is solved by preliminarily increasing the bag length of the outer bag 60 in consideration of the meandering curve of the opened outer bag 60. If the length is longer, the workability of storing the infusion bag 50 in the outer bag 60 by the automatic loading machine is deteriorated, and the infusion bag 50 in the outer bag 60 is easily shaken during transportation. There arises a new problem that it is easy to receive damage such as pinholes.
[0007]
Accordingly, an object of the present invention is to form an outer bag for an infusion bag that can ensure a sufficient re-sealing allowance in the mouth formed by opening without increasing the bag length. The object is to provide a bag-forming substrate.
[0008]
[Means for solving the problems and effects thereof]
In order to solve the above-mentioned problem, the invention according to claim 1 is such that an outer bag for an infusion bag for sealing and packaging an infusion bag formed by a long strip-like multilayer sheet having a gas barrier layer is continuously connected. The multilayer sheet has a tear layer imparted with tearing properties in a direction perpendicular to the feeding direction from the raw roll, and the tear layer and the gas barrier layer However , unlike the adhesive layer , and laminated through another layer having better bending resistance than the tear layer , each of the outer bag for infusion bag connected to each other, each opening direction is, In a state where the bottom side of one of the adjacent infusion bag outer bags and the mouth side of the other infusion bag outer bag are connected to each other so as to coincide with the tearing direction of the tear layer in the multilayer sheet, Specially made in bags There is provided a bag forming substrate to.
[0009]
Since the bag-forming base material configured as described above is manufactured in such a manner that the opening direction of the outer bag for each infusion bag connected to each other matches the tearing direction of the tear layer in the multilayer sheet. , infusion bag Yogaiso bag this formed from the bag forming substrate is cut upon opening sealed becomes substantially straight, as in the conventional infusion bag Yogaiso bag, there is no possibility to meandering curved incision. Therefore, in this outer bag for an infusion bag, sufficient re-sealing allowance necessary for resealing can be ensured without making the bag length longer than necessary.
[0010]
Further, since this bag forming base material is made in a state where the bottom side of one adjacent infusion bag exterior bag and the mouth side of the other infusion bag exterior bag are connected to each other, When packaging the bag, if the outer bag for the infusion bag is sequentially separated from the bag-forming base material, foreign matter and dust can be prevented from entering the bag until the infusion bag is hermetically packaged. Can do.
[0011]
In the case of a bag-forming substrate formed by a multilayer sheet having a tear layer imparted with tearability in the feeding direction from the raw roll, that is, in the opening direction of the outer bag for infusion bags and the multilayer sheet In order to match the tearing direction of the tear layer, in the case of a bag-forming base material in which the side portions of adjacent outer bag for infusion bag are connected to each other, both of the connected outer bag for infusion bag are connected. The step of separating the outer bag for the infusion bag from the bag forming base material by sequentially cutting the boundary portion (side portion), and the seal portion (for the bag forming base material of the bag forming base material) that seals the mouth of the outer bag for the infusion bag A step of forming a mouth portion by cutting off one side edge portion), but in this bag forming base material, the bottom side of one adjacent infusion bag exterior bag and the other infusion bag exterior The mouth side of the bag is connected to each other Therefore, by sequentially cutting the boundary portion between the two infusion bag outer bags connected to each other, the separation of the outer bag for the infusion bag from the bag forming base material and the formation of the mouth with respect to the outer bag for the infusion bag Can be performed simultaneously.
[0012]
In addition, since the tear layer has poor bending resistance and pinholes are likely to be generated by bending, if a tear layer is laminated on the gas barrier layer, if a pin hole occurs in the tear layer, the adjacent gas barrier layer It will trigger the generation of pinholes. Therefore, it is desirable to laminate the tear layer and the gas barrier layer through another layer that is different from the adhesive layer and has better bending resistance than the tear layer , as in this bag forming substrate. In particular, as in the bag-forming base material of the invention according to claim 2, the multilayer sheet has a sealant layer made of an unstretched film, and the tear layer and the sealant layer are adjacent to each other. The linear tearing property of the tear layer can be maximized.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. As shown in FIG. 1 (a), the outer bag 1 for an infusion bag is obtained by stacking two multilayer sheets 10 and 10 and heat-sealing the bottom and both sides with a predetermined width. As shown in Fig. (B), when the infusion bag B is stored and the mouth is heat sealed, the heat sealed upper side edges are not triggered by breakage at the upper side edges. A pair of cuts 1a, 1a are formed, and the infusion bag outer bag 1 whose mouth is resealed after being once opened for dispensing treatment to the infusion bag B is opened again (breaking). A pair of cuts 1b and 1b are formed as a trigger for the operation. Note that the shaded display portions in FIGS. 1A and 1B indicate the heat seal portions.
[0014]
As shown in FIG. 2, the multilayer sheet 10 includes a base material layer 11 having a thickness of 25 μm excellent in heat resistance and impact resistance, a gas barrier layer 12 having a thickness of 30 μm that blocks the passage of oxygen, a cut 1 a, A tear layer 13 having a thickness of 25 μm having tearability in a breaking direction connecting 1b and a sealant layer 14 having a thickness of 50 μm having thermal adhesiveness, and a gas barrier layer 12 on the inner surface side of the base material layer 11; A layer 13 and a sealant layer 14 are sequentially laminated via an adhesive. As a laminating method, a dry laminating method or a sand laminating method in which melt extrusion is performed and polyethylene is laminated is used.
[0015]
The base material layer 11 is formed of a single layer film (thickness 10 to 30 μm) such as a biaxially stretched polypropylene film, a biaxially stretched polyamide film, or a biaxially stretched polyester film, and the sealant layer 14 is a straight chain It is formed by a low-density polyethylene film (thickness 40-100 μm).
[0016]
The gas barrier layer 12 is formed of a laminate film having a two-layer structure or a three-layer structure in which an ethylene-vinyl alcohol copolymer (EVOH) and polyamide are coextruded. It is also possible to form by a vapor deposition film or a polyvinyl alcohol film on which silicon oxide is vapor-deposited.
[0017]
The tear layer 13 is formed of a film that can ensure good linear tearability. As such a film, it is possible to use a film stretched in one direction, a film stretched in one direction and stretched small in the other direction, or a film in which a uniaxially stretched film (layer) is laminated on a biaxially stretched film (layer). it can. As the uniaxially stretched film, a film obtained by stretching high-density polyethylene 5 to 15 times in the transverse direction (for example, “Kalalian YC”, “Kalalian Y”: manufactured by Toyo Kagaku) is preferable because it has excellent linear cut properties. Moreover, as a film formed by laminating a uniaxially stretched film on a biaxially stretched film, first, a film obtained by uniaxially stretching a melt-extruded sheet in the longitudinal direction is prepared, and then on the surface (one side or both sides) of the uniaxially stretched film. A film (for example, “polypropylene film YT42”, “polypropylene film YT25” manufactured by Toray Industries, Inc.) obtained by extruding a resin and stretching in the lateral direction is used.
[0018]
The infusion bag outer bag 1 configured as described above has a long belt-shaped bag forming base material 2 continuously connected to the infusion bag outer bag 1 as shown in FIG. 3 wound in a roll shape. When the infusion bag B is supplied in the state of the base roll and hermetically wraps the infusion bag B, the bag forming base 2 is unwound from the base roll and cut at a predetermined cutting position indicated by a two-dot chain line in FIG. It is designed to be used while being disconnected.
[0019]
This bag forming base material 2 has a long tear layer 13 provided with tearing properties in a direction (lateral direction) orthogonal to the feeding direction from the raw roll R, as indicated by arrows in FIG. Using the strip-shaped multilayer sheet 10, it is manufactured as follows.
[0020]
First, as shown in FIGS. 5 (a) and 5 (b), the long strip-shaped multilayer sheet 10 fed out from the raw roll R is so that the inner surface side sealant layers 14 are in contact with each other. The sheet is fed while being folded in two in the direction (lateral direction) perpendicular to the feeding direction from the anti-roll R.
[0021]
Thus, as shown in FIG. 6A, the multilayer sheet 10 folded in two in the lateral direction is continuously heat-sealed at both side edges with a predetermined width by the vertical sealing roller SR. As shown in FIG. 2B, after heat sealing with a predetermined width in the horizontal direction at predetermined intervals by the horizontal seal bar SB, the punched blade C cuts into predetermined positions on both sides of the heat-sealed side. When 1a and 1b are formed, the bag forming substrate 2 is completed. Note that the shaded display portions in FIGS. 6A and 6B indicate the heat seal portions. The cuts 1a and 1b may be formed when the infusion bag is hermetically packaged in the infusion bag outer bag separated from the bag forming base material.
[0022]
As described above, in the outer bag 1 for infusion bags, the multilayer sheet 10 forming itself is given tearing properties in a direction (lateral direction) perpendicular to the feeding direction from the raw roll R. Since the multilayer sheet 10 is used so that it has a tear layer 13 and the tear direction of the tear layer 13 coincides with the opening direction, as shown in FIG. The cut formed by breaking from the cut 1a is substantially linear. Therefore, in this outer bag 1 for infusion bags, as shown in FIG. 2B, a sufficient re-sealing allowance L necessary for resealing is ensured without making the bag length longer than necessary. be able to.
[0023]
Moreover, when manufacturing a bag formation base material using the multilayer sheet | seat which has a tear layer provided with tearability in the delivery direction (longitudinal direction) from a raw fabric roll, the side parts of the exterior bag for adjacent infusion bags In order to prevent foreign matter and dust from entering the bag until the infusion bag is hermetically sealed, the mouths of the outer bag for each infusion bag that are connected to each other are sealed. In order to stop, not only one side edge part which becomes a bottom part but also the other side edge part which becomes a mouth part in the bag forming base material is heat-sealed together. Therefore, the mouth part of the outer bag for the infusion bag separated from the bag forming base material is sealed by sequentially cutting the boundary portion (side part) of the outer bag for both infusion bags connected thereto. Since it is in a state, in order to hermetically wrap the infusion bag, a seal part (the other side edge part of the bag forming base material) sealing the mouth part of the separated outer bag for infusion bag is separately provided. The mouth must be formed by excision.
[0024]
On the other hand, as described above, the long strip-shaped multilayer sheet 10 having the tear layer 13 to which tearability is imparted in the direction (lateral direction) perpendicular to the feeding direction from the raw fabric roll R. The bag forming base material 2 manufactured by use is in a state in which the bottom side of one adjacent infusion bag exterior bag 1 and the mouth side of the other infusion bag exterior bag 1 are connected to each other. Therefore, by sequentially cutting the boundary portion (indicated by a two-dot chain line in FIG. 3) between the two infusion bag exterior bags 1 connected to each other, the infusion bag exterior bag 1 can be separated from the bag forming base material 2. The formation of the mouth portion with respect to the outer bag 1 for infusion bags can be performed simultaneously.
[0025]
In the above-described embodiment, in the manufacturing process of the bag forming base material, the long strip-shaped multilayer sheet 10 fed out from the raw roll R is folded in two in the lateral direction, but this is not limitative. However, two multilayer sheets fed out from the two original rolls may be superposed on each other. However, even in that case, it goes without saying that the tear layer of each multilayer sheet must be provided with tearability in a direction (lateral direction) perpendicular to the feeding direction from the raw fabric roll.
[0026]
Moreover, in embodiment mentioned above, although the tear layer 13 is formed in the 3rd layer from the outer surface side of the multilayer sheet 10, it is not limited to this, A tear layer can be provided in arbitrary positions. . However, in order to maximize the linear tearability of the tear layer, as described above, it is adjacent to an unstretched film such as a linear low density polyethylene film forming the sealant layer 14. It is desirable to form the tear layer 13 at the position.
[0027]
In the embodiment described above, the single bag infusion bag outer bag 1 has been described. However, the present invention is not limited to this, and the infusion bag outer bag is formed by a double bag having an inner bag and an outer bag. It is also possible to do. For example, in the state where the inner sheet having the sealant layer on the inner surface side and the outer surface side, which forms the inner bag, and the outer sheet having the sealant layer on the inner surface side, which form the outer bag, are sequentially overlapped, It is formed into a bag shape by heat sealing, and a double bag in which the inner bag and the outer bag are joined at the heat sealing portion, or as in Examples 1 to 12 shown in Table 1 and Table 2, A composite sheet is formed by dry laminating an interior sheet and an exterior sheet having a sealant layer on the inner surface side through a release layer, excluding the peripheral edge portions that are bonded to each other. When handling outer packaging bags for infusion bags, such as forming a bag by heat-sealing the peripheral edge and sealing the infusion bag, the inner sheet and outer bag forming the inner bag are formed. It is also possible and outer sheet there are adopted a double bag as separated spontaneously.
[0028]
[Table 1]

[0029]
[Table 2]

[0030]
When the outer bag for an infusion bag is formed of such a double bag, the gas barrier layer must be provided at least on the interior sheet side, but the tear layer is on either the interior sheet or the exterior sheet. What is necessary is just to provide, and both the interior sheet and the exterior sheet | seat may be equipped with the tearing layer. In particular, as in Examples 7 to 12, when the tear layer is provided on both the interior sheet and the exterior sheet, compared to the case where the tear layer is provided only on either the interior sheet or the exterior sheet. The load at the time of breakage is reduced, and it is possible to easily break and to improve the linear tearability.
[0031]
Also, in the case where the outer bag for infusion bags is formed of a double bag, as in the case of a single bag, in order to maximize the linear tearability of the tear layer, Examples 6, 8, and 10 are used. , 12, it is desirable to form a tear layer at a position adjacent to the unstretched film forming the sealant layer or the like.
[0032]
In addition, the tear layer has poor bending resistance, and pinholes are likely to be generated by bending. Therefore, if a tear layer is laminated on the gas barrier layer, if a pin hole occurs in the tear layer, the tear gas layer is It will trigger the generation of pinholes. Therefore, from the viewpoint of protecting the contents, it is desirable not to laminate the tear layer directly on the gas barrier layer as in Examples 1 to 3.
[Brief description of the drawings]
FIG. 1A is a plan view showing an embodiment of an outer bag for an infusion bag according to the present invention, and FIG. 1B is a plan view showing a state in which the infusion bag is sealed and packaged in the outer bag for an infusion bag according to the present invention. is there.
FIG. 2 is a cross-sectional view showing a multilayer sheet forming the outer bag for an infusion bag same as above.
FIG. 3 is a plan view showing a bag forming substrate according to the present invention.
FIG. 4 is a perspective view showing an elongated belt-like multilayer sheet used for producing the bag-forming base material.
FIG. 5A is a plan view showing a folding process of the same multilayer sheet, and FIG. 5B is a side view showing the folding process of the same.
FIGS. 6A and 6B are plan views showing a heat sealing process of the multilayer sheet of the same.
FIG. 7A is a plan view showing a state in which the above-mentioned outer bag for infusion bags in which the infusion bag is hermetically sealed is opened, and FIG. 7B is a state in which the outer bag for infusion bags once opened is resealed. FIG.
FIG. 8 is a plan view showing a state in which an infusion bag is hermetically packaged in a conventional outer bag for an infusion bag.
FIG. 9 is a plan view showing a state in which the outer bag for an infusion bag is opened.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer bag for infusion bags 1a, 1b Cut 10 Multi-layer sheet 11 Base material layer 12 Gas barrier layer 13 Tear layer 14 Sealant layer B Infusion bag C Stamping blade SR Vertical seal roller SB Horizontal seal bar

Claims (2)

A bag-forming substrate formed by a long strip-shaped multilayer sheet having a gas barrier layer, continuously connected to an outer bag for an infusion bag for hermetically packaging an infusion bag,
The multilayer sheet, as well has a tear layer tearability direction is imparted perpendicular to the feeding direction of the sheet roll, and the tear layer and the gas barrier layer is different from the adhesive layer, and , Laminated through another layer having better bending resistance than the tear layer ,
Each of the outer bags for infusion bags connected to each other has a bottom side of one of the outer bags for infusion bags adjacent to each other so that the opening direction thereof coincides with the tearing direction of the tear layer in the multilayer sheet. A bag-forming base material, wherein the other side of the outer bag for an infusion bag is connected to the mouth side. The multilayer sheet has a sealant layer made of an unstretched film,
The bag forming substrate according to claim 1, wherein the tear layer and the sealant layer are adjacent to each other.

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