WO2003057580A1 - Sachet autoportant et procede de production de ce sachet - Google Patents

Sachet autoportant et procede de production de ce sachet Download PDF

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Publication number
WO2003057580A1
WO2003057580A1 PCT/JP2002/013587 JP0213587W WO03057580A1 WO 2003057580 A1 WO2003057580 A1 WO 2003057580A1 JP 0213587 W JP0213587 W JP 0213587W WO 03057580 A1 WO03057580 A1 WO 03057580A1
Authority
WO
WIPO (PCT)
Prior art keywords
edge
bag
self
bag body
standing
Prior art date
Application number
PCT/JP2002/013587
Other languages
English (en)
Japanese (ja)
Inventor
Kazuhiro Ikeda
Yoshimi Usami
Takaaki Katsuhara
Original Assignee
Fujimori Kogyo Co., Ltd.
Mitani Sangyo Co., Ltd.
Act-T Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujimori Kogyo Co., Ltd., Mitani Sangyo Co., Ltd., Act-T Corporation filed Critical Fujimori Kogyo Co., Ltd.
Priority to AU2002357514A priority Critical patent/AU2002357514A1/en
Priority to US10/500,049 priority patent/US20050053314A1/en
Publication of WO2003057580A1 publication Critical patent/WO2003057580A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • B29C45/14475—Joining juxtaposed parts of a single article, e.g. edges of a folded container blank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5866—Integral spouts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • the present invention relates to a self-supporting bag provided with a part of a closure, and more particularly, to a self-standing bag which is flexible, has excellent self-supporting properties, and also has excellent attachment strength for a part of the closure.
  • self-standing bags for liquids such as liquids are mainly used for refilling, and the self-sufficiency has not been given much weight.
  • the content is reduced to about 13 or less, the upper part of the bag will bend, It no longer functions as a self-supporting bag.
  • self-supporting bags for fluids may have some closures for pouring out contents, in which case the upper part becomes heavy and lacks self-reliance.
  • I was In a conventional free-standing bag with a part of the closure, a peripheral part of the bag body is joined by heat welding, and a part of the closure is separately formed, and a closure part is formed between sheets forming the bag body. Part of the closure was attached by manual insertion and heat welding to the inner surface of the sheet.
  • Such manual work not only affects mass productivity, but also may result in insufficient heat welding between the closure and the sheet, resulting in insufficient strength of the bag body.
  • molded containers naturally have sufficient independence, but could not be folded or discarded when discarded.
  • the present invention has been made in view of the above circumstances, and when used, retains the function as a self-standing bag until the contents are exhausted, and when discarded, it can be folded down to reduce the capacity, as well as a part of the closure. It is an object of the present invention to provide a self-standing bag excellent in mounting strength and a method of manufacturing a self-standing bag suitable for manufacturing the self-standing bag.
  • the present invention is a self-standing bag provided with a closure portion at the top of the bag body, wherein both side edges and the upper edge of the bag body are made of a thermoplastic resin which covers the outer surfaces of these edges.
  • the edge joining portion of the bag body and the closure portion are formed by injection molding.
  • the present invention relates to the method for producing a self-standing bag, wherein when forming the edge joining portion of the bag body, a cavity is formed at an edge of the bag body, and a thermoplastic resin is applied to the cavity.
  • the present invention provides a method for manufacturing a self-standing bag, wherein an edge is joined by injecting and joining the edges of the bag body.
  • a die which is substantially half-shaped of the edge joining portion is formed on one surface side of the edge of the bag main body by a die slide injection method, A thermoplastic resin is injected into the cavity to form a substantially half body of the edge joint, and then a cavity is formed on the other side of the edge of the bag body so as to have the remaining shape of the edge joint. It is more preferable that the thermoplastic resin is injected into the cavity to mold the remaining portion of the edge joining portion, and that the edge of the bag body be joined to form the edge joining portion.
  • the edge joining portion made of a thermoplastic resin covering the outer surface of these edges.
  • the part becomes the so-called rib of the bag body and functions as a support for the bag, thereby improving the independence of the bag body. Even if a part of the closure is provided at the top of the bag body, sufficient independence until the contents are exhausted Sex can be maintained. And since the closure part is integrally formed with the above-mentioned edge joint part, the attachment strength of a part of the closure is also excellent.
  • the edge joining portion and the closure portion of the bag body are formed by injection molding, the edge joining portion can be easily and reliably formed by, for example, a die slide injection method. Since it is possible to form and simultaneously mold the closure part, it is more preferable.
  • a cavity is formed at an edge of the bag body, and a thermoplastic resin is injected into the cavity to form the bag body.
  • a method for producing a self-supporting bag characterized in that an edge joining portion is formed by joining edges of the self-standing bag. For example, forming the edge joining portion of the bag body of the self-standing bag At this time, a cavity is formed on the one side of the edge of the bag body by a die slide injection method so as to be a substantially half shape of the edge joint, and a thermoplastic resin is injected into the cavity to form the edge joint.
  • a substantially half body is molded, and then a cavity is formed on the other surface so as to form the remaining portion of the edge joining portion.
  • a thermoplastic resin is injected into the cavity to mold the remaining portion of the edge joining portion.
  • This is a manufacturing method for forming an edge joint by joining the edges of the bag body.
  • the thermoplastic resin is injected so as to cover the outer surface of the end portion of the bag body placed in the mold in a state where the sheets are overlapped, by injection molding performed in one step.
  • the edge of the bag body can be reliably located at the center of the resin (the center of the joint) as compared with the case where the edge joint is formed. Therefore, it is preferable because the edges of the bag body can be more easily and reliably joined.
  • the self-supporting bag of the present invention is flexible and also excellent in self-sustainability, it functions as a self-supporting packaging bag when used, and satisfies self-sustainability even if a part of the closure is provided until the contents are exhausted. However, after use, it can be rolled up and discarded in a small capacity, and it also has excellent attachment strength for a part of the closure. Therefore, the self-standing bag of the present invention is easy to use at the time of use, can easily reduce the volume at the time of disposal after use, and is adapted to environmental protection. Further, according to the method for manufacturing a self-standing bag of the present invention, a self-standing bag having the above-described characteristics and having particularly excellent bonding strength of the bag body can be easily and reliably manufactured. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a schematic perspective view of a self-standing bag illustrating one configuration example of the self-standing bag of the present invention.
  • FIG. 2 is a schematic front view of the self-standing bag.
  • FIG. 3 is a schematic diagram of an injection mold explaining one configuration example of a method for manufacturing a self-standing bag of the present invention.
  • FIG. 4 is a schematic diagram of the above injection mold.
  • FIG. 5 is a schematic partial view of the injection mold.
  • FIG. 6 is another schematic partial view of the injection mold. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a schematic perspective view showing a state where the self-standing bag 1 is inflated.
  • 1 is a schematic front view showing a state in which a self-standing bag 1 is folded.
  • the self-standing bag 1 has a closure part 3 at the upper end of the bag body 2 and folds so that the lower side of the long film constituting the bag body 2 is folded into four parts.
  • a bottom surface 2c is formed by joining a to the upper edge 2b to the other edge 2a.
  • a single-layer or multilayer film is used as the bag body 2. These films do not necessarily have to have heat-sealing properties like conventional films, but when formed into a bag, the film surface on the outer surface side is infused with resin to be injected to form an edge joint. Preferably, the adhesion is good.
  • the multilayer film is a co-extruded film, a laminated film, or the like. In order to add a necessary function to a stretched or unstretched polyolefin, nylon, polyester film or resin layer, for example, a gas barrier layer (EVOH, Saran, ceramic vapor deposition) is used. And the like, or a co-extrusion type film or a laminate type film thereof is preferably used.
  • the thickness of the film 20 to 900 m is applied.Thick film is suitable for self-sustainability, but even for thin film for flexibility and light weight, The independence can be secured by providing. From the viewpoint of moldability and handleability, a desirable thickness is preferably 100 to 200 m.
  • the film is not limited to a synthetic resin film, but may be a single-layer product or a laminate product of paper or metal foil.
  • the shape and size of the closure part 3 are not particularly limited, and may be any shape and size according to the intended use of the packaging bag.
  • the self-supporting bag with a part of the closure is usually manufactured by inserting the closure member into the upper end of the self-standing bag by hand or by another operation using an automatic insertion machine and heat-welding the closure member. If the thickness is large, it is difficult to securely bond both ends of the closure member, and welding work is often difficult. However, in the present invention, such a difficulty does not occur because the injection molding is performed integrally with the edge joining portion 4 as described later.
  • the edge joint 4 is integrally molded with the closure part 3 simultaneously by injection molding, or The part 3 of the closure is molded first and then integrally molded in a mold.
  • These forming resins are resins that can be injection-molded and that can join the edges of the bag body 2.
  • injectable plastics such as general-purpose resins such as polyethylene and polypropylene resins, for example, blends or copolymer resins of nylon, polyester, various engineering resins, elastomers, etc. can also be used. is there.
  • the edge joining portion 4 is formed along a side of one side ⁇ 2 a to an upper end 2 b to another side ⁇ 2 a of the bag main body 2 made of a resin film molded in a predetermined self-standing bag shape.
  • the width and thickness are not particularly limited, but the width (arrow w in FIG. 1) is 1 to 20 mm, especially 5 to: L 0 mm, and the thickness (in FIG. 1).
  • the arrow d) is preferably formed to have a length of l to 10 mm, particularly 2 to 5 mm.
  • the width is too narrow or too thin, it may be difficult to obtain sufficient bonding strength. If the thickness is too thick, the amount of resin used increases, which is not preferable from the viewpoint of disposability, and the width is If it is too wide, it may be difficult to obtain a sufficient internal volume of the self-supporting bag.
  • the method for producing the self-standing bag 1 is not particularly limited, but as shown in FIGS. 3 and 4, a substantially half body of the edge joining portion is provided on one side of the edge of the bag body,
  • a second mold 6 is provided for forming the cavity forming the remainder with the upper mold 6a and the lower mold 6b.
  • the upper molds 5a, 6a are provided with filling ports 7, 7, respectively. 5, a die slide injection system having a structure in which the second mold 6 slides, using an injection molding machine A capable of in-mold molding and insert molding, and having a predetermined self-standing bag shape in advance. It is preferable that the resin film 2 ′ molded and folded as described below is manufactured as follows. You.
  • the resin film 2 ′ is set on the lower mold 5 b of the first mold 5, and then the upper mold 5 a is lowered, and the upper end of the resin film 2 ′ bag body and Insert the tapered tip 8a of the slide core 8 for partially forming the closure between the films on the one end 2'a side, and cut the four-folded part of the other end 2'b forming the bottom of the bag body.
  • Set one piece. Set in this way and remove the lower edge
  • a bottom surface that can be expanded is formed.
  • the upper mold 5a descends, it faces one end 2'a of the resin film 2 'and both side ends (not shown), and as shown in FIG.
  • a cavity 9a is formed on one surface side of the portion to be the side wall peripheral portion, the cavity 9a being a substantially half shape of the edge joining portion.
  • the thermoplastic resin melted and softened by the filling port 7 provided in the upper mold 5a, the eject mechanism (not shown) provided in the lower mold 5b, and the vacuuming mechanism connected to the cavities 5b. Injecting into the cavity of the bag, a part of the closure is molded at a predetermined position on the upper end of the bag body, and at the same time, the thermoplastic resin extending from the part of the closure causes the resin film 2 ′ as shown in FIG.
  • the edge joining portion 4 when the edge joining portion 4 is formed in two steps, the end of the resin film 2 ′ folded so as to have a bag body shape is injected into the cavity by the thermoplastic resin. This prevents the overlapping film ends from opening and the film ends from being distorted in one direction with the film ends overlapping. It can be joined while sandwiched between the parts.
  • the self-standing bag is filled with contents (not shown) from a part of the closure to form a self-supporting shape with a widened bottom. After sealing the part of the closure, it is stored and transported. In use, the contents can be discharged from a part of the closure.
  • the type of the contents is not particularly limited, but those having fluidity are suitable, and for example, liquids, viscous materials, powders, small-diameter granular materials, and the like can be suitably accommodated. Since the self-standing bag functions as a rib at the edge joints on both sides, the self-supporting bag can maintain its independence until the contents are exhausted, and can be rolled up and made small when discarded.
  • the present invention is not limited to the above configuration, and may be variously modified without departing from the gist of the present invention.
  • the molding may be performed in one step, or instead of sliding the die as described above, a slidable pin is provided in a mold, and this pin is provided. Injection is performed halfway while holding the bag body so that the edge of the bag body is located at the center of the edge joint.
  • the edge joints can be molded to a predetermined thickness and fixed after joining.
  • closures can be selected in various ways. For example, a cap that can be opened and closed with a cap sealed with screws and a hinge may be added, or a closure provided with a nozzle for taking out the contents by suction may be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)

Abstract

L'invention concerne un sachet (1) autoportant comprenant un élément (3) de fermeture placé sur un corps (2) de sachet. Ce sachet est caractérisé en ce que les deux bords (2a, 2a) terminaux latéraux et les bords (2b) terminaux supérieurs du corps (2) du sachet sont connectés mutuellement au moyen d'éléments (4) connecteurs en résine thermoplastique qui recouvrent les surfaces externes des bords terminaux, et l'élément (3) de fermeture est formé d'un seul tenant avec les éléments (4) connecteurs des bords.
PCT/JP2002/013587 2001-12-28 2002-12-26 Sachet autoportant et procede de production de ce sachet WO2003057580A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002357514A AU2002357514A1 (en) 2001-12-28 2002-12-26 Self-standing bag and method of manufacturing the bag
US10/500,049 US20050053314A1 (en) 2001-12-28 2002-12-26 Self-standing bag and method of manufacturing the bag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-399960 2001-12-28
JP2001399960A JP3952145B2 (ja) 2001-12-28 2001-12-28 自立袋及びその製造方法

Publications (1)

Publication Number Publication Date
WO2003057580A1 true WO2003057580A1 (fr) 2003-07-17

Family

ID=19189544

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/013587 WO2003057580A1 (fr) 2001-12-28 2002-12-26 Sachet autoportant et procede de production de ce sachet

Country Status (4)

Country Link
US (1) US20050053314A1 (fr)
JP (1) JP3952145B2 (fr)
AU (1) AU2002357514A1 (fr)
WO (1) WO2003057580A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4231989B2 (ja) * 2002-03-19 2009-03-04 藤森工業株式会社 自立袋及びその製造方法
US20060021996A1 (en) * 2004-07-30 2006-02-02 Scott L J Iii Multi-chambered drink bottle
US20060062497A1 (en) * 2004-08-03 2006-03-23 Murray R C Flexible pouch with flat seam and method of forming
US9751661B2 (en) 2004-08-03 2017-09-05 Pouch Pac Innovations, Llc Flexible pouch and method of forming flexible pouch
JP5124085B2 (ja) 2005-08-24 2013-01-23 押尾産業株式会社 自立袋及びその製造方法
JP5049537B2 (ja) * 2005-12-14 2012-10-17 押尾産業株式会社 自立袋
JP5202814B2 (ja) * 2006-03-28 2013-06-05 藤森工業株式会社 スタンディングパウチおよびその製造方法
JP5032141B2 (ja) * 2007-02-08 2012-09-26 押尾産業株式会社 包装袋
JP5350647B2 (ja) * 2008-02-19 2013-11-27 押尾産業株式会社 包装袋
JP5925488B2 (ja) * 2011-12-27 2016-05-25 押尾産業株式会社 包装袋
CN102991828B (zh) * 2012-12-12 2015-06-24 无锡市旗能包装科技有限公司 一种液体食品包装用桶中袋
ITAN20130072A1 (it) * 2013-04-10 2014-10-11 Fintema S R L Struttura di stampo di formatura, in multi-iniezione, di manufatti plastici
CA2927233A1 (fr) * 2013-11-06 2015-05-14 The Procter & Gamble Company Recipients dotes d'un volume de produit et structure d'espacement couplee sur celui-ci
US20160280439A1 (en) * 2015-03-27 2016-09-29 Pouch Pac Innovations, Llc Flexible pouch with reinforced side seal
KR101969665B1 (ko) 2015-04-10 2019-04-16 더 프록터 앤드 갬블 캄파니 보강 시일을 가진 가요성 용기
WO2016164681A1 (fr) * 2015-04-10 2016-10-13 The Procter & Gamble Company Contenants souples dotés d'éléments inférieurs intermédiaires
US11952192B2 (en) * 2018-09-26 2024-04-09 Robert C. Kelly Standing pouch with cap on folded edge

Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH11301696A (ja) * 1998-04-13 1999-11-02 Hanshin Kasei Kogyo Kk ２液用容器
JP2000211655A (ja) * 1999-01-25 2000-08-02 House Foods Corp 包装用容器

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Publication number Priority date Publication date Assignee Title
US3363039A (en) * 1963-08-09 1968-01-09 Asahi Dow Ltd Injection molding processes for thermoplastic materials
US3362302A (en) * 1965-08-12 1968-01-09 Studley Paper Company Inc Bag closure
US3956045A (en) * 1971-12-21 1976-05-11 Hoffman Louis S Method and apparatus for bonding layers of resinous material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11301696A (ja) * 1998-04-13 1999-11-02 Hanshin Kasei Kogyo Kk ２液用容器
JP2000211655A (ja) * 1999-01-25 2000-08-02 House Foods Corp 包装用容器

Also Published As

Publication number Publication date
JP3952145B2 (ja) 2007-08-01
AU2002357514A1 (en) 2003-07-24
JP2003191964A (ja) 2003-07-09
US20050053314A1 (en) 2005-03-10

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