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EP1466831B1 - Abgedichteter beutel mit aufreissstreifen - Google Patents

Abgedichteter beutel mit aufreissstreifen Download PDF

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Publication number
EP1466831B1
EP1466831B1 EP02786113A EP02786113A EP1466831B1 EP 1466831 B1 EP1466831 B1 EP 1466831B1 EP 02786113 A EP02786113 A EP 02786113A EP 02786113 A EP02786113 A EP 02786113A EP 1466831 B1 EP1466831 B1 EP 1466831B1
Authority
EP
European Patent Office
Prior art keywords
unsealing tape
cut
bag
unsealing
tape
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP02786113A
Other languages
English (en)
French (fr)
Other versions
EP1466831A1 (de
EP1466831A4 (de
Inventor
Shuichi Goto
Yuichi Ohki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Unitech Co Ltd
Original Assignee
Idemitsu Unitech Co Ltd
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 Idemitsu Unitech Co Ltd filed Critical Idemitsu Unitech Co Ltd
Publication of EP1466831A1 publication Critical patent/EP1466831A1/de
Publication of EP1466831A4 publication Critical patent/EP1466831A4/de
Application granted granted Critical
Publication of EP1466831B1 publication Critical patent/EP1466831B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8123—Applying strips
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • 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
    • B65D75/66—Inserted or applied tearing-strings or like flexible elements

Definitions

  • the present invention relates to a sealed bag with unsealing tape. More specifically this invention relates to a sealed bag with unsealing tape provided on the opening-part side of a packaging bag used for packaging foods, drugs or the like therein.
  • bags enable to be easily opened and closed by forming a zipper (an engaging device), which includes a male member and a female member, in an opening-part thereof have been used in many fields such as foods, drugs, daily commodities, and the like.
  • a zipper an engaging device
  • a section between the zipper and a seal part in the opening-part side of the bag is cut in, and then the bag is opened and resealed at the zipper part.
  • a user For opening a sealed bag, a user generally cuts the bag with the conventional type of scissors or tears a part to be cut in with hands from an end part thereof. To facilitate the operation of tearing the part to be cut in with hands, sometimes a notch is formed at a side edge of the bag.
  • Means 1 Formation of a perforated line as a line for tearing on the opening-part side.
  • Means 2 Use of laminated film with the inner surface film relatively thick for forming a bag, and formation of a zipper on the inner surface film as well as a perforated line in a part outer from the zipper formed on the inner surface film and closer to an edge of the bag (Refer to Japanese Utility Model Publication No. S52-18254 ).
  • Means 3 Formation of a cutting-plane line having a specific form (Refer to Japanese Utility Model Publication No. S62-13838 )
  • the sealing performance is rather low because of the use of a perforated line, and sometimes the bag employing the means I may be opened during transportation or in other similar situations.
  • an inner surface side film with a perforated line formed thereon itself can be tone along a straight line, but when the inner surface side film is thermally fused and stuck to the base film, the perforations are filled with materials from the base film due to the thermal effect, which disadvantageously makes it difficult to tear the bag.
  • US-A-5116140 discloses a sealed bag with a tear string provided on a opening part side thereof, the sealed bag comprising a tear string stuck in parallel to said opening part on one inner surface of said packaging bag, wherein a cutout part is formed on a surface opposite to the surface with said tear string stuck thereon, on an end part side of said tear string of said packaging bag.
  • WO-A-80/02828 discloses a band-like tearing member.
  • the present invention provides a sealed bag according to claim 1.
  • the present invention provides a sealed bag with unsealing tape which can provides the excellent sealing performance before its use and also which can easily be cut in and unsealed manually.
  • Adhesion of the unsealing tape is carried out by using an adhesive or thermally, for instance, by heat-sealing.
  • the tape of the present invention is not limited to the one with the large width, but can be the one with the small width. Tape with the relatively smaller width is preferable because the tearing guide effect is higher. However, when the width is large, the higher tensile strength can be obtained even if the thickness is small. When the width is small, the high strength can be obtained by making the thickness larger.
  • band-shaped unsealing tape is stuck on one inner surface of a packaging bag in parallel to the opening part thereof, and a perforated line or the like is not provided, and because of the configuration, there is not a space communicating to the outside, so that the excellent sealing performance before the packaging bag is opened is provided without fail.
  • a cutout part is formed on a surface opposite to the surface with the unsealing tape stuck thereon at an end part of the unsealing tape of the packaging bag, therefore the cutout part is present on one surface of the packaging bag as well as on one surface of the unsealing tape, so that the end part of the unsealing tape is exposed in the cutout part and the cutout par can easily be raised.
  • the sealed bag with unsealing tape there is formed, on the packaging bag and/or on the unsealing tape, a pair of cut-in parts each cut in from an end part of the unsealing tape with the terminating edge present at a position inner from the end part of the unsealing tape.
  • a section between the cut-in parts functions like a tab, and the tab-formed section can be pinched as it is when unsealing the packaging bag, so that the operation for manually cut-in and unsealing the bag can easily be performed.
  • the cut-in parts are preferably arranged diagonally against the unsealing tape with the base edges of the cut-in parts arranged outside the unsealing tape.
  • cut-in parts can be formed correctly on one surface of the packaging bag as well as on the unsealing tape without fail.
  • the pair of cut-in parts get closer in a direction toward the depth of the bag (in which cutting-in is performed), so that the cut-plane line can be guided to a specified position (such as a center line of the unsealing tape), and a desired and correct cut-plane line can be acquired without fail, even if the work for cutting in is performed manually.
  • the unsealing tape is drawn uniaxially in the longitudinal direction.
  • drawing means physically drawing a polymeric material into the fiber-like or film-formed state.
  • the strength or elasticity modulus of the polymeric material can be improved, and when a crystalline polymer is drawn at a temperature higher than the glass transition temperature but lower than the melting point, molecules in the non-crystalline portion are drawn in the drawing direction with the crystallinity improved and the molecules are oriented in the drawing direction. As a result, the tensile strength and elasticity modulus become larger.
  • Uniaxially drawing herein indicates drawing in one direction, and for instance, when a film is drawn uniaxially, the strength in the drawing direction becomes stronger than that in the vertical direction to provide an anisotropic material, and when the material is torn, the directivity for being torn in the drawing direction becomes higher.
  • the draw ratio should be 5 times or more, and preferably in the range from 8 to 12 times.
  • the unsealing tape is preferably made of polyolefin-based resin, and the polyolefin-based resin is preferably polyethylene-based resin or polypropylene-based resin.
  • polyethylene there can be enlisted polyethylene, polypropylene, polybutene and the like.
  • polyethylene-based resin there can be enlisted linear low density polyethylene (LLDPE), high density polyethylene (HDPE), low density polyethylene (LDPE) or the like.
  • LLDPE linear low density polyethylene
  • HDPE high density polyethylene
  • LDPE low density polyethylene
  • polypropylene for producing polypropylene-based resin there can be enlisted homopolypropylene, random polypropylene, block polypropylene and the like.
  • the unsealing tape is made of polyolefin-based resin, so that processing such as molding or drawing is performed easy because the polyolefin-based resin has the thermoplasticity,
  • the polyethylene-based resin is excellent in the dampproof capability, waterproof capability, cold resistance, and chemical resistance, and is well adapted to use for packaging a product in the liquid state.
  • the polypropylene-based resin has the small specific gravity, so that the resin can contribute to weight reduction of a packaging bag itself.
  • a zipper comprising a pair of male and female members is preferably stuck to both inner surfaces of the bag.
  • a zipper comprising a pair of male and female members is stuck to both inner surfaces of the bag, and the zipper can repeatedly be opened or closed, so that the sealing performance of the bag can be maintained.
  • Fig. 1 shows a packaging bag 1 according to one embodiment of the present invention.
  • the packaging bag 1 comprises polyethylene sheets 10A (top side in the figure), 10B (rear side in the figure) sealed along the four edges thereof by means of heat sealing or the like. These sealed portions form a heat-sealed part 12. One edge of the rectangular packaging bag 1 functions as an opening part 2.
  • Unsealing tape 3 is wide tape made of polyolefin-based resin and is welded to the opening part 2 side on a surface of the polyethylene sheet 10B by heat sealing or the like, and is drawn uniaxially in the longitudinal direction.
  • a cutout part 4 is formed at an end part of the unsealing tape 3 of the packaging bag 1 on the opening part 2 side on a surface of the polyethylene sheet 10A and has a rectangular form.
  • a cut-in part 5 is formed at an end part of the unsealing tape 3 and is inclined from the polyethylene sheet 10B against an edge of the unsealing tape 3 so that the cut-in part 5 extends to inside of the unsealing tape 3. Further the cut-in part 5 is formed within a range of the cutout part 4. It is to be noted that the cutout part 4 and cut-in part 5 are provided both on heat-sealed parts 12 of two edges perpendicular to the opening section 2 in this embodiment.
  • a zipper 11 comprises a pair of a male member and a female member, which are stuck by heat sealing or the like under the unsealing tape 3 on the opening part 2 side to the polyethylene sheets 10A, 10B respectively.
  • the zipper 11 is stuck to an inner surface of the packaging bag 1.
  • the zipper 11 is made of polyethylene.
  • the cutout part 4 is formed on the opening part 2 side and on a surface of the polyethylene sheet 10A and has a rectangular form, while the cut-in part 5 is positioned at an end part of the unsealing tape 3 in the outer side from the unsealing tape 3, and inclined from a cut-in part base end 5A positioned on the polyethylene sheet 10B, and extends to a cut-in part end part 5B positioned in the inner side from the unsealing tape 3.
  • the cut-in part end part 5B is formed in the inner side from the unsealing tape 3 as shown in Fig. 3 which is a cross-sectional view taken along the line X-X in Fig. 2.
  • an end part of the unsealing tape 3 is pinched up, and then is pulled in the direction indicated by the arrow in the figure to tear the packaging bag 1.
  • the section in which the polyethylene sheet 10B, unsealing tape 3, and polyethylene 10A are overlaid on each other is linearly torn from the cut-in part end part 5B in a direction parallel to the unsealing tape 3.
  • the unsealing tape 3 is held between the polyethylene sheets 10A, 10B.
  • the cutout part 4 is formed at a position corresponding to the unsealing tape 3 on the polyethylene sheet 10A.
  • the polyethylene sheets 10A, 10B, and the unsealing tape 3 are heated, melted and stuck to each other by a heat seal bar 20, and a heat-sealed part 12 is formed at a position corresponding to the cutout part 4.
  • the section in which the polyethylene sheet 10B, unsealing tape 3, and polyethylene sheet 10A are overlaid on each other is cut in with a cut-in part bar 30 between the two sets of cut-in parts 5.
  • the polyethylene sheets 10B with the two sets of cutout parts 4 and cut-in parts 5 formed thereon, unsealing tape 3, and polyethylene sheets 10A are laminated to form a laminated body, and heat-sealed parts are formed along two edges each perpendicular to the heat-sealed part 12 shown in the figure, thus a packaging bag being formed.
  • the cut-in part 5 inclines from the cut-in part base end 5A positioned in the outer side from the unsealing tape 3 and extends to the cut-in end parts 5B positioned in the inner side from the unsealing tape 3.
  • the cut-in part 5 may have the cut-in part base end 5A positioned in the inner side from the unsealing tape 3.
  • the cut-in part 5 may not incline, and the pair of cut-in parts may be, for instance, parallel to each other as shown in Fig. 6.
  • cutout parts 4 and cut-in parts 5 are formed at both end parts of the unsealing tape 3 respectively in the embodiment described above, the configuration is allowable in which the cutout part and the cut-in part are formed only at one end part (namely, only in the right or left side of the bag shown in Fig. 2 and Fig. 6).
  • the unsealing tape 3 is not limited to that having a relatively large width as described in the embodiment above, and also the unsealing tape having a small width may be used so long as the tensile strength providing the tearing guide effect can be obtained.
  • the zipper 11 is stuck to the opening part 2 side in the embodiment described above, but may not be provided.
  • the packaging bag is adapted to be used as a disposable bag.
  • the unsealing tape 3 is made of polyethylene in the embodiment described above, but the material is not limited to polyethylene, and the unsealing tape 3 may be made of polypropylene.
  • the present invention can be applied to packaging bags for packing foods, drugs, and the like therein, especially as a sealed bag with unsealing tape, an opening part side of which can easily be unsealed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Claims (6)

  1. Abgedichteter Beutel (1), welcher zwei gegenüberliegende Folien (10A, 10B) umfasst, von denen eine jede eine innere und eine äußere Oberfläche aufweist, wobei der abgedichtete Beutel einen Aufreißstreifen (3) umfasst, der parallel aufgeklebt ist an einem Öffnungsteil (2) auf einer inneren Oberfläche einer der genannten Folien (10B), wobei ein Ausschneidteil (4) ausgebildet ist in der anderen Folie (10A), gegenüberliegend von einem Endteil des Aufreißsteifens (3), dadurch gekennzeichnet, dass der Aufreißstreifen (3) bandartig ausgebildet ist, wobei der Aufreißstreifen (3) uniaxial in Längsrichtung gestreckt ist und wobei ein Paar von Einschneidteilen (5) ausgebildet ist auf einer der Folien (10B) und/oder dem Aufreißstreifen und sich von einer Kante des Aufreißstreifens (3) erstreckt mit eingeschnittenen Endteilen (5B), die positioniert sind an einer von der Kante nach innen versetzen Stelle der Einschneidteile (5).
  2. Abgedichteter Beutel mit Aufreißstreifen nach Anspruch 1, wobei die Einschneidteile (5) geneigt sind gegen den Aufreißstreifen (3) und ein Basisende eines jeden Einschneidteils außerhalb des Aufreißstreifens vorliegt.
  3. Abgedichteter Beutel mit Aufreißstreifen nach Anspruch 1 oder 2, wobei der Aufreißstreifen (3) aus einem polyolefinbasierten Harz besteht.
  4. Abgedichteter Beutel mit Aufreißstreifen nach Anspruch 3, wobei das polyollefinbasierte Harz ein polyäthylenbasiertes Harz ist.
  5. Abgedichteter Beutel mit Aufreißstreifen nach Anspruch 3, wobei das polyollefinbasierte Harz ein polypropylenbasiertes Harz ist.
  6. Abgedichteter Beutel mit Aufreißstreifen nach einem der Ansprüche 1 bis 5, wobei ein Reißverschluss (11) ein Paar aus einem eingreifenden Element und einem in Eingriff zu bringenden Element umfasst, welches angeklebt ist an jeweils einer der beiden inneren Oberflächen des Beutels.
EP02786113A 2001-12-18 2002-12-17 Abgedichteter beutel mit aufreissstreifen Expired - Lifetime EP1466831B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2001384731 2001-12-18
JP2001384731 2001-12-18
PCT/JP2002/013170 WO2003051729A1 (en) 2001-12-18 2002-12-17 Sealed bag with unsealing tape

Publications (3)

Publication Number Publication Date
EP1466831A1 EP1466831A1 (de) 2004-10-13
EP1466831A4 EP1466831A4 (de) 2005-03-02
EP1466831B1 true EP1466831B1 (de) 2008-01-23

Family

ID=19187750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02786113A Expired - Lifetime EP1466831B1 (de) 2001-12-18 2002-12-17 Abgedichteter beutel mit aufreissstreifen

Country Status (9)

Country Link
US (1) US20050063624A1 (de)
EP (1) EP1466831B1 (de)
JP (1) JPWO2003051729A1 (de)
KR (1) KR20040077856A (de)
CN (1) CN1604867A (de)
AT (1) ATE384671T1 (de)
DE (1) DE60224845T2 (de)
DK (1) DK1466831T3 (de)
WO (1) WO2003051729A1 (de)

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Also Published As

Publication number Publication date
KR20040077856A (ko) 2004-09-07
CN1604867A (zh) 2005-04-06
JPWO2003051729A1 (ja) 2005-04-28
DK1466831T3 (da) 2008-06-02
EP1466831A1 (de) 2004-10-13
WO2003051729A1 (en) 2003-06-26
EP1466831A4 (de) 2005-03-02
ATE384671T1 (de) 2008-02-15
DE60224845D1 (de) 2008-03-13
US20050063624A1 (en) 2005-03-24
DE60224845T2 (de) 2008-11-13

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