JP4022051B2 - Soft bag and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a bag body made of a soft sheet made of synthetic resin, and in particular, a bag body (soft bag) in which outer peripheral surfaces of soft sheets are joined to each other and a through-hole is formed in the outer peripheral surface portion thereof. The present invention relates to a bag used for a medical bag such as a bag or a liquid bag, a beverage bag, and the like, and a manufacturing method thereof.
[0002]
[Prior art]
  Compared to a hard hollow body such as a plastic bottle, a soft bag can be folded and processed after using the contents of the bag, so it is easy to carry and handle waste. Therefore, the demand is high, and recently, soft bags are widely used in medical bags such as infusion bags and dialysis bags, beverage bags, refill bags, and the like. However, since these soft bags have a soft seat as a main body, they are relatively difficult to handle and have difficulty in joining the outer peripheral surfaces. Generally, in many cases, pipe parts are manually inserted between stacked soft sheets, and then the periphery of the soft sheets is thermally welded.
[0003]
  For example, a soft bag such as a medical bag currently in use is made of a body formed by superposing two separate flexible synthetic resin sheets or a tube-shaped flexible synthetic resin sheet. There is something formed. In the present invention, both sheets will be described as stacked sheets. A bag-shaped medical bag is manufactured by manually inserting a liquid injection port member or the like into the outer peripheral surface of the overlapped flexible synthetic resin sheet and then thermally welding the outer peripheral surface.
[0004]
  A manufacturing process of a general medical bag will be described. For example, as shown in FIG. 15 and FIG.1,Cut the original sheet with two sheets overlapped into a predetermined length,2,The periphery of the cut sheet is welded (better seal), and the outer peripheral surfaces of the two sheets are joined together,3,Trimming cut into product shape,4,Print explanations, drawings, etc. on the sheet surface,5,A liquid inlet member is inserted between the two unjoined portions of the sheets to weld the liquid inlet member and the two sheets, and a tube is attached to a part of the liquid inlet member. After that, appearance inspection and sampling inspection are conducted.
[0005]
  For example, in JP-A-8-117317,1,Extrude the tube-shaped sheet,2,Weld the mouth to the extruded sheet,3,Press and fuse the outer peripheral surface of this sheet,4,A series of processes for trimming and cutting the fused portion into a product shape is disclosed. In Japanese Patent Laid-Open No. 8-117318,1,Place the ring mouth between the two synthetic resin sheets,2,Press and fuse the outer peripheral surface of this sheet,3,The thing which cut | disconnects the fuse | melted part in a bag shape is disclosed.
[0006]
[Problems to be solved by the invention]
  In the manufacturing method, a pipe member such as a liquid injection port is manually inserted between two sheets, and the two sheets and the pipe member are heat-welded. Therefore, this manual work process takes time, and the molding time (molding cycle) becomes long, resulting in poor mass productivity. It is also a factor of cost increase. In addition, the joining between the duct member and the two sheets is insufficient, and the strength of the bag body is insufficient. In Japanese Patent Laid-Open No. 8-117318, a bank-like protrusion is formed on the outer periphery of the base portion of the pipe member in order to secure the bonding strength between the pipe member and the sheet. .
[0007]
  For the purpose of solving the above-described problems caused by heat-welding the sheet and the pipe member, the present invention does not insert another pipe member between the two sheets, but instead inserts the outer peripheral edge of the sheet by injection molding. An object of the present invention is to provide a soft sheet bag body in which a pipe line is formed and joined integrally with a sheet by forming a pipe line at the same time as sealing the surfaces and a molding method thereof.
[0008]
  In particular, the present invention is an injected synthetic resin in which the outer peripheral surface of the soft sheet is joined and at the same time the through-pipe is formed of the synthetic resin at the same time, and the outer side of the outer peripheral surface of the soft sheet is covered with the injection resin. Another object of the present invention is to provide a soft sheet bag body and a molding method thereof.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, the invention according to claim 1 is the outer peripheral surface of at least a part of the overlaid soft sheets.MutualIs an injection molded synthetic resinCoveredThe outer peripheral surface is bonded and sealedMutualInIt has a hollow portion that penetrates the internal space and the outside of the soft seatThe through pipe is made of the injection molded synthetic resin.At the same time as the joint sealFormedThe synthetic resin layer of the through-duct is formed outside the outer peripheral surfaces of the overlapped soft sheets.Since it is a soft bag and the through-pipe can be formed with the same synthetic resin as the synthetic resin used when joining the outer peripheral surface of the seat, the close-pipe and the soft sheet are in close contact with each other, and the manufacturing cost can be greatly reduced..
[0010]
  Claim2The invention described is composed of one tubular sheet having both ends opened, and one end of the tubular sheetMutualIs covered and sealed with injection-molded synthetic resin, the other endMutualIs covered and sealed with the injection-molded synthetic resin, and the other endMutualInIt has a hollow portion that penetrates the internal space and the outside of the soft seatThe through pipe is made of the injection molded synthetic resin.At the same time as the joint sealFormed of the through-ductThe synthesisIt is a soft bag in which the resin layer is formed on the outer side of the tube-shaped sheet, and the end of the soft sheet is surely brought into close contact with the through pipe line, and the manufacturing cost can be greatly reduced.
[0011]
  In addition, you may make it form a joining seal | sticker and a through pipe line also on one outer peripheral surface.
[0012]
  Claim3The invention described is a soft bag in which two rectangular soft sheets are overlapped and a space is formed in the soft sheet, and the outer peripheral surfaces of three sides of the soft sheetMutualIs covered and sealed with injection-molded synthetic resin, and the remaining outer peripheral surfaceMutualIs covered and sealed with the injection-molded synthetic resin, and between the remaining outer peripheral surfaces,It has a hollow portion that penetrates the internal space and the outside of the soft seatThe through pipe is made of the injection molded synthetic resin.At the same time as the joint sealFormed of the through-ductThe synthesisThe resin layer is formed on the outer side of the soft sheet, and the adhesion of the outer peripheral edge of the sheet and the formation and adhesion of the through pipe line can be achieved with high quality. In addition, you may make it form a joining seal | sticker and a penetration pipe line also in the outer peripheral surface of three sides.
[0013]
  Claim4The described inventionHeavyThe set soft sheet is set in one mold of the split mold for injection molding, the tip of the slide core is inserted between the soft sheets from the outer peripheral surface of the soft sheet, and the outer peripheral surface of the soft sheet And forming a cavity on the outer peripheral surface of the slide core in contact with the outer peripheral surface, aligning the other mold with one mold, clamping the mold, and injecting synthetic resin into the cavity, Join the outer peripheral surfaces of the soft sheet with synthetic resinstickerThenBothThe internal space between the soft seats communicates with the outsideHas a hollow partThe outer peripheral surface of the through pipe lineOutside of each otherTheInjectedWith synthetic resinAt the same time as the joint sealIt is a manufacturing method to be formed, and the sheet outer peripheral surfaces are bonded to each other by the injection-molded synthetic resin, and at the same time, the through material is formed with the same material, so that the work process is shortened and the sheet can be manufactured at low cost. Adhesiveness with the through pipe line is excellent, and the strength of the soft bag can be improved.
[0014]
  Claim5The described inventionHeavyCut the bonded long soft sheet into a predetermined length, cut the outer peripheral surface of the cut soft sheet into a predetermined shape, and use the cut soft sheet as one mold of the split mold for injection molding Set, insert the tip of the slide core from the outer peripheral surface of the soft sheet between the soft sheets, and form a cavity in the outer peripheral surface of the soft sheet and the outer peripheral surface of the slide core in contact with the outer peripheral surface Then, the other mold is matched with the other mold and clamped, and the synthetic resin is injected into the cavity, so that the outer peripheral surfaces are bonded to each other with the synthetic resin.JoiningWhen you sealBothCommunication between the internal space between the soft seats and the outsideHas a hollow partThe outer peripheral surface of the through pipe lineOutside of each otherTheInjectedWith synthetic resinAt the same time as the joint sealIt is a manufacturing method to be formed, can perform a series of process operations continuously, and is excellent in mass productivity.
[0015]
  Claim6The described invention is claimed.4Or claim5In the soft bag manufacturing method described above, the outer peripheral surface of the soft sheet is set in a direction in which the outer peripheral surfaces of the soft sheet are separated from each other before the superimposed soft sheet is set in one mold of the split mold for injection molding. Are separated so that even if the sheets are stuck together so that the sheets are in close contact with each other, the tip of the slide core can be smoothly inserted without damaging the soft sheet, and the yield is improved.
[0016]
  Claim7The described invention is claimed.4Or claims6EitherOneIn the soft bag manufacturing method according to claim 1, the soft bag is a medical bag, and a synthetic resin is injected to an outer peripheral surface of the soft bag to form a seal portion, and at the same time, a medical device that forms an opening for suspension in the seal portion This is a method for manufacturing a medical bag, which can produce a medical bag with a small number of processes, which can improve productivity and reduce costs.
[0017]
  Claim8The described invention is claimed.4Or claims7EitherOneIn the soft bag manufacturing method described above, the tip of the slide core is inserted between the soft sheets from the outer peripheral surface of the soft seat, and the outer peripheral surface of the soft sheet and the outer peripheral surface of the slide core in contact with the outer peripheral surface After forming the cavity, aligning the other mold to one mold and clamping the mold, before injecting synthetic resin into the cavity, slide the outer peripheral surface of the sheet located on the outer periphery of the slide core. Since the pressing means for pressing the core outer periphery is provided, the synthetic resin can be reliably injected to the outer periphery so as to cover the outer peripheral surface of the sheet.
[0018]
  Claim9The described invention is claimed.8In the soft bag manufacturing method described above, the pressing means has a slide pin provided on the mold so as to be slidable in the contact and separation direction with respect to the outer periphery of the slide core. Since the synthetic resin can be filled after the slide pin is moved, the outer peripheral surface of the seat can be reliably sealed.
[0019]
  Claim 10The described invention is claimed.7Or claims9In the soft bag manufacturing method described above, in a portion where the outer peripheral surfaces of the soft sheets are joined together, one mold is provided with a protruding portion that penetrates the soft sheet, and the other mold is provided with the protruding portion. The receiving groove portion is provided, and when the mold is clamped, the protruding portion is inserted into the groove portion and the soft sheet is sandwiched. Therefore, the positioning of the outer peripheral surface to be joined can be ensured, and joining deviation can be prevented.
[0020]
  Claim 11The invention described in claim 10In the soft bag manufacturing method described above, the protrusion is formed on a slide pin provided on the mold so as to be slidable in the contact and separation direction with respect to the outer periphery of the soft seat. Since the resin can be reliably injected and the synthetic resin can be filled after the slide pin is moved, the outer peripheral surface of the seat can be reliably sealed.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a chemical solution bag 1 for dialysis according to the first embodiment of the present invention. FIG. 2 shows a manufacturing process of the drug solution bag 1 of FIG. FIG. 3 is a schematic diagram of an injection mold 20 according to the embodiment of the present invention. 4 and 5 are partial views of the injection mold 20 according to the embodiment of the present invention.
[0022]
  The medical bag shown in FIG. 1 is a chemical solution bag 1 for dialysis and has a bag body 2. The bag body 2 is made of a flexible resin soft sheet S formed in a cylindrical shape, and chemical solution storage portions 3 and 4 are formed inside the bag body 2. The chemical liquid storage units 3 and 4 have side portions 31 and 41 and bottom portions 32 and 42 respectively corresponding to the side portion S1 and the bottom portion S2 on the outer peripheral surface of the soft sheet S, and the bottom portions 32 and 42 are connected to each other. Communication is possible in the passage 5, and pipes are provided in the end portions 30 and 40 of the chemical solution storage portions 3 and 4 corresponding to the end portion S 0 on the outer peripheral surface of the soft sheet S.
[0023]
  An injection line 6 and a mixed injection port 7 are provided at the end 30 of the chemical solution storage unit 3. The injection pipe 6 has a pipe body 6 a that opens to the inside and the outside of the chemical liquid storage unit 3, and a tube (not shown) is connected to the pipe line body. Used to supply and discharge chemicals. The mixed injection port 7 includes a cylindrical body 7a that opens to the inside and outside of the chemical liquid storage section 3, and a cap section 7b that is formed to be foldable and separable at the tip of the cylindrical body 7a. Used to inject and mix chemicals into Holes 8 are provided at several locations on the end 30 of the chemical solution storage unit 3, and the holes 8 are used as openings for hanging the chemical solution bag.
[0024]
  An injection conduit 10 and a sampling port 11 are provided at the end 40 of the chemical solution storage unit 4. The injection conduit 10 has a conduit body 10a that opens to the inside and outside of the chemical solution storage section 4, and a tube (not shown) is connected to the conduit body 10a. Used to supply and discharge chemicals inside. The sampling port 11 has a cylindrical body 11a that opens to the inside and outside of the chemical liquid storage section 4, and an elastic stopper 11b that seals the external opening of the cylindrical body 11a. Used at the time of inspection and replenishment of chemicals. A long hole 9 is provided in the central portion of the end portion 40 of the chemical solution storage portion 4, and the long hole 9 is used as an opening for holding or hanging the chemical solution bag 1.
[0025]
  The manufacturing process of the chemical solution bag 1 of this embodiment will be described with reference to FIGS. (A) A long original fabric made of a cylindrical soft sheet S is prepared, (b) the original fabric is cut into sheets of a predetermined length, (c) Next, a medical bag as shown in FIG. Trimmed to the outer shape in the cut mold. Then, (d) after an explanatory text, a picture, or the like is printed on the outer surface of the soft sheet S, (e) it is set in the injection mold 20.
[0026]
  Next, (f) in the injection mold 20, as shown in FIGS. 3 to 5, the soft sheet S is set on the lower mold 21 of the injection mold. Thereafter, the upper mold 22 of the injection mold is lowered, and the tapered tip 23a of the slide core 23 for forming a pipe line is inserted between the soft sheets S. As shown in FIG. 5, the upper mold 22 of the injection mold is lowered to face the side part S1, the bottom part S2, and the end part S0 of the soft sheet S, and a cavity 24a is formed as shown in FIG. Then, the mold is clamped in a state where the cavity 24 b is formed so as to face the outer peripheral surface 23 b of the slide core 23. FIG. 3 is a three-plate type injection molding apparatus 20, which is a schematic view schematically showing the seal portions of the end portion S 0 and the bottom portion S 2 of the soft sheet S during mold clamping, and the upper die 22 has a filling port 25. The lower mold 21 is provided with an eject mechanism 26 (only a part of which is shown). Although not shown, the upper die 22 and the lower die 21 are provided with a vacuum drawing mechanism connected to the cavities 24a and 24b, and when the synthetic resin is introduced into the cavities 24a and 24b, The gas is sucked.
[0027]
  In this embodiment, the slide core 23 slides in conjunction with the vertical movement of the upper mold 22, but it does not necessarily have to be interlocked, for example, it may slide independently.
[0028]
  Next, (g) a synthetic resin is injected, the cavities 24a and 24b are filled, and the side portion S1 and the bottom portion S2 of the soft sheet S are joined with the synthetic resin. The end S0 is joined with this synthetic resin, and a synthetic resin sealing layer 27 is formed. Thereby, the bag-shaped chemical solution storage unit 3 and the chemical solution storage unit 4 are formed. A pipe body 6 a of the injection pipe 6 is formed integrally with the seal layer 27 of the chemical solution storage unit 3. The mixed injection port 7 has a special shape, and in this embodiment, the mixed injection port 7 made of different parts is inserted and set between the soft sheets S. A pipe body 10 a of the injection pipe 10 and a cylindrical body 11 a of the sampling port 11 are integrally formed on the seal layer 28 of the chemical solution storage unit 4. The elastic stopper 11b of the sampling port 11 is attached later.
[0029]
  After the injection molding, the upper mold 22 is raised and the slide core 23 is moved backward to open the mold. The molded soft bag is ejected by the ejection mechanism 26 and removed from the lower mold 21. After that, as before, (h) Clamping and assembling the communication path 5 between the chemical solution storage unit 3 and the chemical solution storage unit 4 (i) Next, after visual inspection and sampling inspection, (j) Packed.
[0030]
  In this embodiment, the explanatory text and the drawings on the outer surface of the soft sheet S are printed after the trimming cut process. However, if the printing process is performed after the trimming cut process, in any step of the partition wall clamp assembling process. It ’s good. Some types of medical bags do not require printing, in which case the printing step can be omitted.
[0031]
  Moreover, this embodiment is a mixed injection port comprising a cylindrical body 7a that opens to the internal space and the outside of the chemical solution storage section 3, and a cap section 7b that is formed to be foldable and separable at the distal end of the cylindrical body 7a. However, depending on the type of the dialysis drug solution bag 1, there is a dialysis drug solution bag 1 that does not have the mixture injection port 7, and in that case, the member for the mixture injection port 7 is inserted between the soft sheets S. There is no need to set, and the pipe line can be formed of the injection molding material simultaneously with the seal around the soft sheet S.
[0032]
  FIG. 6 relates to the second embodiment and shows the same diagram as FIG. This embodiment is a manufacturing method of the drug solution bag 1 when the soft sheets S are in close contact like one sheet, and it is difficult to smoothly insert the slide core 23 between the sheets S, A different point from FIG. 2 is demonstrated. After the trimming cut step, the end portions S0 of the soft sheet S are once sucked in the trimming cut mold so as to be easily separated, and the slide core 23 in the subsequent step is easily inserted. Then, it is carried into an injection mold. In this embodiment, the slide core 23 is smoothly inserted between the soft sheets S, so that the yield can be reduced without damaging the soft sheets S.
[0033]
  When it is necessary to print a description or a picture on the outer surface of the sheet S, it may be performed somewhere in the partition wall clamp assembly process after the trimming cut process. Omitted.
[0034]
  FIG. 7 shows a third embodiment when the present invention is applied to an infusion bag. In this embodiment, a ring fluid storage part 300 is formed inside the bag body 200. The end portion 301, the side portion 311 and the bottom portion 321 of the bag body 200 corresponding to the end portion S0, the side portion S1 and the bottom portion S2 of the soft sheet S are joined with an injection-molded synthetic resin. In the seal layer 280 of the end portion 301, a through-pipe line 60 that communicates the fluid storage unit 300 with the outside is integrally formed with the same synthetic resin as the seal layer 280. A step portion 61 is formed at the mouth portion of the through pipe line 60, and a rubber-based lid member 62 is inserted into the step portion 61 after being molded. A hole 80 for suspending is formed in the seal layer 270 of the bottom 321.
[0035]
  In this embodiment, synthetic resin is injected into portions corresponding to the end portion 301, the side portion 311 and the bottom portion 321 of the bag main body 200, and the end portion S0, the side portion S1 and the bottom portion S2 of the soft sheet S are joined and the tube The path 60 can be formed at the same time, a soft bag having excellent bonding strength can be manufactured, and mass productivity is excellent.
[0036]
  FIG. 8 relates to the fourth embodiment, and is a view similar to FIG. 4 of the first embodiment, and shows a view in which a mold is omitted. A soft sheet S is set in an injection mold (not shown), and an injection molding space K of the synthetic resin G is formed on the outer peripheral surface of the soft sheet S. At the same time as the mold is closed, the outer peripheral surface of the soft sheet S is partially sandwiched by the pins P1 to prevent the movement of the soft sheet S. The pin P1 is provided from the outer peripheral edge of the soft sheet S to be inward of the soft sheet S by several mm to several tens mm. In particular, a portion where a tapered tip of a slide core (not shown) for forming a duct is inserted between the outer peripheral surfaces of the soft sheet S is pressed with a pin P1 so that the soft sheet S contacts the slide core. . This prevents a gap from being generated between the soft sheet S and the slide core, and prevents the gap G from being filled with the resin G. That is, by pressing the soft sheet S against the slide core with the pin P1, the resin G is filled in the space K between the soft sheet S and the mold.
[0037]
  In particular, the space K, that is, the outside of the soft sheet S is filled with the injection resin G, and this resin G forms a through pipe, so that there is no gap between the soft sheet S and the through pipe. very good.
[0038]
  FIG. 9 relates to the fifth embodiment, and shows a view similar to FIG. 8 of the fourth embodiment. In this embodiment, the amount X of the outer peripheral surface of the soft sheet S protruding into the mold space K is set to about 1 to 1.5 mm, and the influence of the movement of the outer peripheral surface is reduced. Thus, if the protrusion amount X of the outer peripheral surface is reduced, even if the outer peripheral surface of the soft sheet S moves slightly when the resin G is filled, the space K between the soft sheet S and the mold is not crushed. In this space K, the resin G can be filled.
[0039]
  10 and 11 relate to the sixth embodiment, and FIG. 10 shows a view similar to FIG. 8 of the fourth embodiment. In this embodiment, the pin is a slide pin P2. As shown in FIG. 10, the slide pin P <b> 2 protrudes into the mold space K and holds the outer peripheral surface of the soft sheet S from both sides before injecting the synthetic resin G. Then, after injecting the synthetic resin G and a predetermined time, as shown in FIG. 11, the slide pin P2 is retracted, and the resin G is also filled in the portion sandwiched by the slide pin P2. In this embodiment, the outer peripheral surface of the soft sheet S is held until the outer peripheral surface of the soft sheet S is partially filled, and then the slide pin P2 is retracted. The resin G is filled and the contact portion of the slide pin P2 is also filled.
[0040]
  FIG. 12 relates to the seventh embodiment, and shows a view similar to FIG. 8 of the fourth embodiment. In this embodiment, a portion of the slide core C for forming a conduit is shown. In particular, around the slide core C, since the soft sheet S is opened by the slide core C, the released soft sheet S is easy to move in a direction in close contact with the mold. The resin G is easily filled between the soft sheet S and the slide core C. If this progresses, the resin G will not be filled in the space K between the soft sheet S and the mold, and the outer peripheral surface of the soft sheet S will be visible to the outside, which is not preferable in appearance. In addition, the sealing performance at the boundary portion between the soft sheet S spread with the slide core C and the overlapping soft sheet S becomes a serious problem.
[0041]
  In this embodiment, three slide pins P3 are provided, and the soft sheet S is pressed in the direction in contact with the slide core C by the slide pins P3 so that the space K is maintained between the soft sheet S and the mold. Yes. The tip of the slide pin P3 is formed in a shape that follows the outer shape of the slide core C, that is, an inclined surface.
[0042]
  Accordingly, since the resin G is filled in the space K, the resin G is formed on the outer side even if the boundary portion between the soft sheet S spread by the slide core C and the soft sheet S overlapping the resin K is not filled. There is no problem at all in this portion of the seal leakage. Further, since the outer side is filled with the resin G, it is possible to prevent the outer peripheral surface of the soft sheet S from being seen in appearance.
[0043]
  If a space K between the soft sheet S and the mold is secured and the space is filled with the resin G, the resin G for injection molding may be slightly filled between the soft sheet S and the slide core C. There is nothing.
[0044]
  FIGS. 13 and 14 relate to the eighth embodiment, FIG. 13 shows a view similar to FIG. 8 of the fourth embodiment, and FIG. 14 shows the chemical solution bag B after molding.
[0045]
  As shown in FIG. 13, one mold is provided with a slide pin P4 in which a protruding portion on the front end side penetrates the outer peripheral portion of the drug solution bag B and opens a hole S3. A groove portion M for receiving the tip side of the slide pin P4 is provided. At the time of mold clamping, as shown in FIG. 13, the slide pin P4 is inserted into the groove portion M, and the outer peripheral surface of the sheet S is positioned and fixed. In this state, the resin G is filled. In this embodiment, the slide pin P4 and the groove part M are fixed, but they may be moved as in the sixth embodiment. As shown in FIG. 14, when the corners and the intermediate part of the chemical solution bag B are fixed with the slide pins P4, the displacement of the outer peripheral surface of the soft seat S can be prevented, and the chemical solution bag B with stable quality can be obtained.
[0046]
  In the present invention, the above-described embodiments can be used in various combinations. For example, a fixed pin and a slide pin can be combined and used separately for each part. Moreover, it is also possible to use it combining with the pin in which the protrusion part was formed in the front end side demonstrated in 8th Embodiment.
[0047]
  In the present invention, the outer peripheral surface of the soft sheet S is in close contact with the mold, and the space K between the soft sheet S and the mold is eliminated, and it is only necessary to prevent this space K from being filled with the resin G. When the resin is filled between the soft sheets S or between the soft sheet S and the slide core C, the space K between the soft sheet S and the mold disappears, and the resin G cannot be filled into the space K. If not, the resin G may be filled between the soft sheets S or between the soft sheets S and the slide cores C.
[0048]
  The two stacked soft sheets S in the present invention are not only those in which two separate sheets are stacked, but also a long cylindrical shape, that is, a sheet having a tube shape cut to a predetermined length. Also included is a sheet in which both end portions S0 on the outer peripheral surface are not sealed and the side portions S1 are already integrated with each other. In addition, the two sheets are two sheets on the front and back sides constituting the bag main body, and the front side sheet and the back side sheet are doubled or tripled.
[0049]
  In addition, for a special conduit that is difficult to be integrally formed at the same time as the sealing between the soft sheets S, for example, the mixed injection port 7 of the chemical solution bag 1 may be inserted between the soft sheets S as usual.
[0050]
  In the above embodiment, the present invention has been described in the case where the present invention is applied to a dialysis bag and an infusion bag. However, the present invention can also be applied to other medical bags. Furthermore, the present invention can be applied to a soft sheet soft bag in which the main body is composed of a soft sheet S, the end portion, the side portion and the bottom portion are joined to each other and a pipe line is formed at the end portion. The present invention can be applied not only to bags for beverages but also to soft bags for beverages and soft bags for refills.
[0051]
【The invention's effect】
  In the present invention, one outer peripheral surface of the overlapped soft sheet is bonded and sealed with an injection molded synthetic resin, and the other outer peripheral surface is bonded and sealed with the injection molded synthetic resin. In this case, since the through-pipe is made of the injection-molded synthetic resin, the close-pipe and the soft sheet have good adhesion, and the manufacturing cost can be greatly reduced.
[0052]
  Further, the through-pipe line made of the injected resin has a hollow portion that penetrates the inside and the outside of the soft sheet, and the resin layer of the through-pipe line is formed to be positioned outside the overlaid soft sheet. By using the soft bag, the outer peripheral surface of the soft seat is not turned over, and the soft seat is surely brought into close contact with the through-pipe, and the outer peripheral surface of the seat does not come out.
[0053]
  In the present invention, the joining of the outer peripheral edge surfaces of the overlaid soft sheets, the integral formation of the through-pipe lines, and the joining of the through-pipe lines and the soft sheets can be performed simultaneously in one injection mold, so that the molding cycle Is short and excellent in mass productivity. In particular, since the formation of the through pipe and the bonding to the soft sheet can be performed at the same time, the mutual bonding strength is strong, and the strength of the soft bag is improved.
[Brief description of the drawings]
FIG. 1 shows a chemical solution bag for dialysis according to a first embodiment of the present invention.
2 shows a manufacturing process of the chemical solution bag of FIG. 1. FIG.
FIG. 3 is a schematic view of an injection mold according to the first embodiment of the present invention.
FIG. 4 is a partial view of an injection mold according to the first embodiment of the present invention.
FIG. 5 shows another partial view of the injection mold according to the first embodiment of the present invention.
FIG. 6 relates to the second embodiment of the present invention, and shows a view similar to FIG.
FIG. 7 shows an infusion soft bag according to a third embodiment of the present invention.
FIG. 8 relates to a fourth embodiment of the present invention, and shows a view similar to FIG. 4 of the first embodiment.
FIG. 9 relates to a fifth embodiment of the invention and shows a view similar to FIG. 8 of the fourth embodiment.
FIG. 10 relates to a sixth embodiment of the present invention, and shows a view similar to FIG. 8 of the fourth embodiment.
FIG. 11 relates to a sixth embodiment of the present invention and shows a state in which a slide pin is pulled.
FIG. 12 relates to the seventh embodiment of the present invention, and shows a view similar to FIG. 8 of the fourth embodiment.
FIG. 13 relates to an eighth embodiment of the present invention, and shows a view similar to FIG. 8 of the fourth embodiment.
FIG. 14 relates to an eighth embodiment of the present invention and shows a chemical solution bag after molding.
FIG. 15 shows a manufacturing process of a conventional chemical solution bag.
16 is a diagram schematically showing a manufacturing process of the chemical solution bag of FIG. 15. FIG.
[Explanation of symbols]
1 chemical bag
2 Bag body
3 Chemical solution storage
30 edge
31 side
32 Bottom
4 Chemical solution storage
40 end
41 side
42 Bottom
5 passages
6 Injection pipeline
6a pipe body
7 Mixed injection port
7a Tubular body
7b Cap part
8 holes
9 Slotted hole
10 Infusion line
10a Pipe body
11 Sampling port
11a Tubular body
11b Elastic stopper
20 Injection mold
21 Lower mold
22 Upper mold
23 Slide core
23a Tip
23b Outer peripheral surface
24a cavity
24b cavity
25 Filling port
26 Eject mechanism
27 Sealing layer
28 Seal layer
S Soft seat
S0 end (outer peripheral surface)
S1 side (outer peripheral surface)
S2 Bottom (outer peripheral surface)
200 Bag body
300 Chemical solution storage
301 end
311 side
321 bottom
60 pipelines
80 holes
P3 slide pin
P4 slide pin
M groove
270 Seal layer
280 Seal layer

Claims (11)

At least a portion of the outer peripheral edge faces of the soft sheet superimposed, along with being joined sealed covered with injection-molded synthetic resin, the outer periphery faces the outside and the internal space of the soft sheet A through-pipe having a hollow portion penetrating is formed at the same time as the joint seal portion with the injection-molded synthetic resin, and the synthetic resin layer of the through-pipe is formed on the outside of the outer peripheral surfaces of the overlapped soft sheets. A soft bag characterized by being formed in a position . Made from a single tubular sheet in which both end portions are opened, one end portions of the tubular sheet is bonded seal is covered with injection-molded synthetic resin, between the other end portion is molded out the injection synthesis together are joined sealed covered with resin, the said other ends, the interior space and the joint seal part through conduit is molded out the injection of synthetic resin having a hollow extending through the outer of the soft sheet A soft bag which is formed at the same time , and wherein the synthetic resin layer of the through pipe is formed on the outside of the tubular sheet. A soft bag in which two rectangular soft sheets are overlapped and a space is formed inside the soft sheet, and the outer peripheral surfaces of the three sides of the soft sheet are covered with an injection-molded synthetic resin and bonded to each other is, together with the remaining peripheral edge faces are joined sealed covered with injection-molded synthetic resin, the outer peripheral edge surfaces of該残Ri, hollow extending through the outside and the inside space of the soft sheet A soft bag characterized in that a through-pipe having the same is formed at the same time as the joint seal portion with the injection-molded synthetic resin, and the synthetic resin layer of the through-pipe is formed outside the soft seat. The overlapped soft sheet is set in one mold of a split mold for injection molding, the tip of the slide core is inserted between the soft sheets from the outer peripheral surface of the soft sheet, and the outer peripheral surface of the soft sheet And forming a cavity on the outer peripheral surface of the slide core in contact with the outer peripheral surface, aligning the other mold with one mold, clamping the mold, and injecting synthetic resin into the cavity, a through-conduit having a hollow portion communicating with the internal space and the outside between the soft sheet of the outer peripheral faces of the joint seal Then both the soft sheet is the exit to the outside between the outer peripheral surface of a synthetic resin A method for producing a soft bag, characterized in that the soft seal bag is formed at the same time as a joint seal portion with a synthetic resin. Cut the overlapped long soft sheet into a predetermined length, cut the outer peripheral surface of the cut soft sheet into a predetermined shape, and use the cut soft sheet as one mold of the split mold for injection molding Set, insert the tip of the slide core from the outer peripheral surface of the soft sheet between the soft sheets, and form a cavity in the outer peripheral surface of the soft sheet and the outer peripheral surface of the slide core in contact with the outer peripheral surface Te, mold and clamping the combined mold other mold in one mold, by injecting synthetic resin into the cavity, the interior space between both the soft sheet when bonding sealing the outer peripheral surfaces are in the synthetic resin method for producing a soft bag to the injected synthetic resin bonding sealing portion on the outside of the outer peripheral faces of the through-conduit and characterized in that formed at the same time having a hollow portion communicating with the outside and. Before setting the superposed soft sheet in one mold of the split mold for injection molding, the outer peripheral surface of the soft sheet is once separated in a direction in which the outer peripheral surfaces of the soft sheet are separated from each other, 4. a process for producing a soft bag as claimed in claim 5, characterized in that the tip of the slide core is inserted into the susceptible state. Wherein a soft bag of the bag for medical use, for 4 to claims and forming an opening for hanging the seal portion at the same time to form a seal portion by injecting a synthetic resin on the outer peripheral edge surface method for producing a soft bag as claimed in any one of claims 6. The tip of the slide core is inserted between the soft sheets from the outer peripheral surface of the soft sheet, and the cavity is formed on the outer peripheral surface of the soft sheet and the outer peripheral surface of the slide core contacting the outer peripheral surface. After the mold is matched with one mold and clamped, before the synthetic resin is injected into the cavity, there is provided a pressing means for pressing the sheet end face located on the outer periphery of the slide core against the outer periphery of the slide core. method for producing a soft bag as claimed in any one of claims 4 to 7, characterized in. 9. The method of manufacturing a soft bag according to claim 8, wherein the pressing means includes a slide pin provided on the mold so as to be slidable in the contact / separation direction with respect to the outer periphery of the slide core. In a portion where the outer peripheral surfaces of the soft sheets are joined to each other, one mold is provided with a protrusion that penetrates the soft sheet, and the other mold is provided with a groove that receives the protrusion. The method for manufacturing a soft bag according to claim 7 or 9 , wherein, when the mold is clamped, the protruding portion is inserted into the groove to sandwich the soft seat. The protrusion claim 1 0 manufacturing method of the soft bag according to, characterized in that it is formed in the slide pin provided on slideably said mold to contact and separation direction relative to a soft sheet periphery.

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