EP2857322A1 - Sac et procédé de fabrication de sac - Google Patents

Sac et procédé de fabrication de sac Download PDF

Info

Publication number
EP2857322A1
EP2857322A1 EP13187374.7A EP13187374A EP2857322A1 EP 2857322 A1 EP2857322 A1 EP 2857322A1 EP 13187374 A EP13187374 A EP 13187374A EP 2857322 A1 EP2857322 A1 EP 2857322A1
Authority
EP
European Patent Office
Prior art keywords
cover sheet
folded
bag body
tear line
bag
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.)
Withdrawn
Application number
EP13187374.7A
Other languages
German (de)
English (en)
Inventor
Herbert Fürst
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.)
Starlinger and Co GmbH
Original Assignee
Starlinger and Co GmbH
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 Starlinger and Co GmbH filed Critical Starlinger and Co GmbH
Priority to EP13187374.7A priority Critical patent/EP2857322A1/fr
Publication of EP2857322A1 publication Critical patent/EP2857322A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1691—End- or aperture-closing arrangements or devices using adhesive applied to attached closure elements
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
    • 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
    • B65D2203/00—Decoration means, markings, information elements, contents indicators
    • B65D2203/02—Labels

Definitions

  • the invention relates to a bag, in particular box bag or box valve bag, with a tubular bag body, wherein the bag body is folded at least one end portion to a bottom and the folded bottom is connected to a cover sheet, and a method for producing such a bag.
  • the tubular bag body consists of a tubular material or a flat material joined together at its longitudinal edges.
  • Bags with folded bottom usually have a box shape or cuboid shape. They offer optimum material surface utilization, good stacking capacity and, due to the cuboid shape, improved volume utilization. In addition to the box shape, there is still the quasi-box shape, which has a rectangular folded bottom on one side and an end closed by an adhesive, welding or sewing seam on the other side.
  • valves are made in the manufacture of the bag on a bottom, which consist of either a hose or a sheet material and inserted between the end flaps of the bag body and optionally folded.
  • a bottom consist of either a hose or a sheet material and inserted between the end flaps of the bag body and optionally folded.
  • box bags one speaks of box valve bags.
  • Box sacks, box valve bags, or quasi-box sacks usually have a capacity of 10, 25 or 50 kg, for certain applications also up to 1000 kg and are used for the packaging of goods, in particular bulk materials.
  • Box sacks are nowadays commonly made of plastic films or plastic fabrics.
  • Plastic film has no high strength and therefore requires a large material thickness. In addition, it is heat sensitive and not dimensionally stable due to high modulus of elasticity.
  • Plastic fabric of monoaxially stretched plastic tape has a high strength and is dimensionally stable, especially when it is coated. By suitable coating the plastic fabric is also very good printable. Compared to plastic film material consumption is significantly lower when using plastic fabric with the same carrying capacity of the bags.
  • Sacks of fabric made of monoaxially stretched polymer, in particular polyolefin, preferably polypropylene, tapes, which have one or two sides, have proven outstandingly well in practice thermoplastic material, in particular polyolefin may be coated.
  • a bag is from the document WO 95/30598 known.
  • the tapes of this fabric are made by stretching polyolefin films 4 to 10 times their original length and cutting the stretched polyolefin film. Alternatively, the film may be cut into strips before drawing and then the strips stretched into ribbons. By the stretching process, the molecular chains are aligned in the ribbon longitudinal direction and have in the direction of stretching about 6- to 10-fold strength over the original state.
  • the ribbon width is usually about 1.5-10 mm, the thickness 20-80 microns.
  • the ribbons splinter When loaded in the transverse direction, the ribbons splinter, which is why they are woven in round or flat fabric from each other about right-angled warp and weft layers.
  • the fabric then has the same high tensile strength in all directions. Sacks made from such a fabric have been proven for billions of times around the world for the packaging of bulk goods of all kinds for many years.
  • a coating of melt of preferably the same material as the tapes can be applied and pressed onto the fabric on one or both sides.
  • melt coating a lamination of the fabric with plastic film is also provided.
  • Such a fabric / film composite has a construction of a fabric of monoaxially drawn polymer tapes, in particular polyolefin or polyester tapes, preferably polypropylene or polyethylene terephthalate tapes, an OPP (Oriented Poly Propylene) film and an intermediate connecting layer of thermoplastic or adhesive ,
  • the OPP film may be printed on the fabric facing surface.
  • This material structure shows both high strength (through the fabric) and excellent printability (through the OPP film). Since the OPP film is stretched, it also has a very good dimensional stability.
  • BOPP films can also be used, which are so-called Biaxially Oriented Poly Propylene films.
  • tissue-film composites or films it is expedient to provide an OPP film for the fabric-film composite which (at least) has a film seal layer on its surface facing away from the tissue.
  • the fabric of the fabric-film composite on one or both sides with a fabric sealing layer of a thermoplastic Plastic is coated.
  • the film seal layer and / or the tissue sealing layer has a melting point which is below the crystallite melting point of the tissue band material and the OPP film.
  • bag body of multilayer film combined with a cover sheet of multilayer film Bag body of multilayer film combined with a cover sheet of film composite; Bag body of film composite combined with a cover sheet of multilayer film; and bag body of film composite combined with a cover sheet of film composite.
  • these embodiments of the bag do not offer the same high strength as the use of a fabric of monoaxially stretched plastic tapes, but this disadvantage can be mitigated by increasing the number of foil layers.
  • a cover sheet is applied to the folded end tabs of the bag body and connected in a flat manner to the folded bottom.
  • a hot air welding method can be used, in which facing coated surfaces of the folded bottom and the cover sheet heated by hot air to plasticization, pressed against each other and then cooled.
  • An alternative bonding method is the surface bonding of the folded bottom and the cover sheet, for example by means of hot melt adhesive.
  • bags of the type mentioned above which were closed with the cover sheets according to the invention, due to the high strength of folded bottom and cover sheet not without further open nondestructive. Since the bonding or welding of the cover sheet with the folded bottom can not be easily solved, such sacks are usually opened by the bag body itself is slashed with a sharp object, but in bags made of a fabric of monoaxially stretched polymer ribbon due to its extremely high strength is difficult to accomplish. After slitting the bag, there is also the problem of poor handling of the opened bag.
  • the present invention has for its object to find a solution for facilitating the opening of said bags on the folded bottom.
  • the inventive solution is to provide a bag with a tubular bag body, wherein the bag body is folded at least one end portion to a bottom and the folded bottom is connected to a cover sheet, wherein the cover sheet has at least one defined by cuts, perforations or weakening material tear line , At this tear line, the cover sheet can be torn open without tools.
  • the cuts, perforations or material weakening are preferably produced by means of laser cutting or mechanical punching.
  • the material for the cover sheet is a web material on which the at least one tear-open line is first formed and then the cut-off of the cover sheets in a repeat length is effected by means of cross-sections.
  • the topsheet material may be prefabricated off-line by winding the web material onto a roll after forming the at least one tear line and unwinding from the roll for cutting in the repeat length.
  • At least one tear line is arranged to extend between the two end flaps. In this configuration, the user gains access to the interior of the bag by tearing the topsheet along the tear line.
  • the at least one tear line extends over the entire repeat length of the cover sheet.
  • the at least one tear line extends only over part of the repeat length of the cover sheet.
  • the at least one tear line can be covered by a releasably adhering to the cover sheet protective tape.
  • the protective tape Before tearing the cover sheet, the protective tape must first be removed. Subsequently, the tear line can be opened by pulling apart.
  • the protective tape also serves to protect the bag contents from the external environment or to prevent leakage of powdery bag material when the tear line is formed as a perforation or cuts.
  • the protective tape has a free end which does not adhere to the cover sheet. This can be accomplished, for example, by providing a release agent or ensuring that the guard band does not come in contact with an adhesive at the free end.
  • the cover sheet in the torn-open state not only has a slot-shaped opening, but an opening with a defined width. This can be achieved by providing two tearing lines running parallel to one another in the cover sheet, whereby a strip is torn out of the cover sheet for opening. To be able to grasp these strips torn out more easily, the tear-off lines can be formed at one end as cutting lines.
  • the bottom of the bag is folded such that end flaps of opposing walls of the bag body are folded together and the end flap of one wall closes the end flap of the other wall with a cover width Covered, running in half the distance between the two tear lines halving line is offset by half the overlap width to a center line of the bag bottom.
  • the cover sheet of a material which is selected from a fabric of plastic tapes, wherein the fabric is optionally coated on at least one side with a plastic layer, or a fabric of plastic tape, the coated on at least one side with an OPP film, or connected to a network structure plastic film.
  • the cover sheet is printable and can therefore serve as a 'display' when unopened.
  • the cover sheet is made of the same material as the bag body.
  • Fig. 1 shows a box valve bag 1 according to the invention in the empty, folded state in plan view.
  • the bag 1 comprises a tubular bag body 1a made of one of the above-mentioned woven or composite materials folded at its two end portions into bottoms 1d, 1e by folding end flaps of the front wall 1b and the back wall 1c with the additional formation of triangular corner folds. The folding of these soils is well known to the skilled person and, for example, in the WO 95/30598 described.
  • the trays 1d, 1e assume a rectangular configuration.
  • the folded bottom 1 d at the first end of the bag body 1 a is connected by hot air welding or gluing, for example with hot melt adhesive, with a cover sheet 10, which will be described with reference to FIGS Fig. 2 is explained in more detail.
  • the folded bottom 1 e at the second end of the bag body is provided with a valve sheet 2 and also connected to a cover sheet 11.
  • the cover sheets 10, 11 have a repeat length L and are preferably made of the same material as the bag body 1a. However, any other of the above-mentioned materials may also be used.
  • the cover sheets 10, 11 may be provided with a printable coating or a printed film.
  • the cover sheet 10 is provided with a tear line 20 defined by cuts, perforations or material weakening.
  • Fig. 2 shows in perspective a portion of the folded topsheet 10 having a tear line 20 formed in a central portion.
  • the Tear line 20 covered by a detachable by means of adhesive strips 23, 24 on the cover sheet 10 adhesive protective tape 22.
  • the guard band 22 In order for the guard band 22 to be easily peeled off, it has a free end 22a which does not adhere to the topsheet 10, as in FIG Fig. 3 easy to recognize.
  • the tear line 20 extends over the entire repeat length L.
  • Fig. 4 shows an embodiment of the bag, in which the on the folded bottom 1 d of the bag body 1 a glued or welded cover sheet 10 has two mutually parallel tear lines 20, 21 which define a tear strip in the cover sheet 10 between each other.
  • the tear lines are formed at one end for ease of gripping than cutting lines 20a, 21a. So that the end region of the tear strip located between the cut lines 20a, 21a does not adhere to the bag body, a separating means 25 is provided.
  • the tear lines 20, 21 do not extend over the entire repeat length L.
  • FIG. 5 In a schematic plan view of the folded bottom 1d, end flaps 1f, 1g of opposite walls 1b, 1c of the bag body 1a are folded together, the end flap 1g of one wall 1c covering the end flaps 1f of the other wall 1b with a covering width x ,
  • the configuration of folded bottom 1d and cover sheet 10 is such that a halving line h extending half the distance y between the two tear lines 20, 21 is offset by half the overlapping width x to a center line m of the bottom 1d.
  • Fig. 6 shows the production of cover sheets 10 of a web-shaped material 30.
  • the web-shaped material 30 by laser perforation and cutting two parallel tear lines 20, 21 are mounted at a distance y from each other, which are formed in end portions as a continuous section lines 20a, 21a.
  • the material 30 is provided with a release agent 25 which prevents it from sticking to the bag body.
  • the thus prepared sheet material 30 is then cut along transverse cutting lines 31 into individual topsheets 10 in the predefined repeat length L, after forming the tear lines 20, 21 and the release means 25, but before cutting individual topsheets 10, the web material 30 wound onto a roll can be, from which it is unwound from the roll in a bag making machine for cutting cover sheets 10 in the repeat length L.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
EP13187374.7A 2013-10-04 2013-10-04 Sac et procédé de fabrication de sac Withdrawn EP2857322A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13187374.7A EP2857322A1 (fr) 2013-10-04 2013-10-04 Sac et procédé de fabrication de sac

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13187374.7A EP2857322A1 (fr) 2013-10-04 2013-10-04 Sac et procédé de fabrication de sac

Publications (1)

Publication Number Publication Date
EP2857322A1 true EP2857322A1 (fr) 2015-04-08

Family

ID=49303815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13187374.7A Withdrawn EP2857322A1 (fr) 2013-10-04 2013-10-04 Sac et procédé de fabrication de sac

Country Status (1)

Country Link
EP (1) EP2857322A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017220712A1 (fr) * 2016-06-23 2017-12-28 Starlinger & Co Gesellschaft M.B.H. Sac ou emballage de type sac
EP3498624A1 (fr) * 2017-12-14 2019-06-19 Starlinger & Co Gesellschaft m.b.H. Sac pour matière en vrac

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030598A1 (fr) 1994-05-04 1995-11-16 Starlinger & Co. Gesellschaft Mbh Sac en tissu de polymere, notamment de polyolefine, et son procede de fabrication
EP0748745A1 (fr) * 1995-06-14 1996-12-18 Bongrain S.A. Dispositif d'ouverture d'un sachet d'emballage en film mince
DE60119141T2 (de) * 2001-12-22 2007-02-01 The Procter & Gamble Company, Cincinnati Verpackung für zusammenpressbare Produkte sowie Verfahren zur Herstellung der Verpackung
EP2394806A1 (fr) * 2010-06-09 2011-12-14 Cetec Industrie Conditionnement Sac comportant une bande rapportée pour sa fermeture et dispositif de dépose d'une bande rapportée pour obtenir un sac selon l'invention
EP2468650A1 (fr) * 2010-12-23 2012-06-27 Mondi AG Sac dotée d'une ligne d'ouverture et d'une poignée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030598A1 (fr) 1994-05-04 1995-11-16 Starlinger & Co. Gesellschaft Mbh Sac en tissu de polymere, notamment de polyolefine, et son procede de fabrication
EP0748745A1 (fr) * 1995-06-14 1996-12-18 Bongrain S.A. Dispositif d'ouverture d'un sachet d'emballage en film mince
DE60119141T2 (de) * 2001-12-22 2007-02-01 The Procter & Gamble Company, Cincinnati Verpackung für zusammenpressbare Produkte sowie Verfahren zur Herstellung der Verpackung
EP2394806A1 (fr) * 2010-06-09 2011-12-14 Cetec Industrie Conditionnement Sac comportant une bande rapportée pour sa fermeture et dispositif de dépose d'une bande rapportée pour obtenir un sac selon l'invention
EP2468650A1 (fr) * 2010-12-23 2012-06-27 Mondi AG Sac dotée d'une ligne d'ouverture et d'une poignée

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017220712A1 (fr) * 2016-06-23 2017-12-28 Starlinger & Co Gesellschaft M.B.H. Sac ou emballage de type sac
CN109415140A (zh) * 2016-06-23 2019-03-01 史太林格有限责任公司 囊或袋状包装
RU2697107C1 (ru) * 2016-06-23 2019-08-12 Штарлингер Унд Ко Гезелльшафт М.Б.Х. Упаковка в виде пакета или мешка
CN109415140B (zh) * 2016-06-23 2019-12-03 史太林格有限责任公司 囊或袋状包装
EP3498624A1 (fr) * 2017-12-14 2019-06-19 Starlinger & Co Gesellschaft m.b.H. Sac pour matière en vrac
WO2019115105A1 (fr) * 2017-12-14 2019-06-20 Starlinger & Co Gesellschaft M.B.H. Sac pour matériaux en vrac
CN111511650A (zh) * 2017-12-14 2020-08-07 史太林格有限责任公司 用于松散材料的袋子
RU2769355C2 (ru) * 2017-12-14 2022-03-30 Штарлингер Унд Ко Гезелльшафт М.Б.Х. Мешок для сыпучего материала
US11524815B2 (en) 2017-12-14 2022-12-13 Starlinger & Co Gesellschaft M.B.H. Bag for loose material

Similar Documents

Publication Publication Date Title
DE602005000086T2 (de) Einfach zu öffnende Verpackung
EP1799583B1 (fr) Emballage non refermable pour produits dangereux
EP0162291B2 (fr) Emballage pour marchandises en colis
EP2236275B1 (fr) Procédé de fabrication pour une feuille d'emballage flexible dotée d'une fermeture refermable
EP3081374B1 (fr) Composite en tissu et matière plastique, sachet d'emballage en composite en tissu et matière plastique et procédé de fabrication d'un sac d'emballage
DE60219688T2 (de) Verpackung, wie zum beispiel beutel, mit ausgerichteter aufreissöffnung
EP1449789A1 (fr) Conteneur d'emballage comprenant une feuille d'emballage ayant un système intégré d'ouverture et de refermeture
EP0042832A1 (fr) Emballage
EP3052395B1 (fr) Sac et procédé de fabrication de sac
DE102007035501A1 (de) Verschlusseinrichtung zur Verwendung an einem Verpackungsbehälter
DE4240207C2 (de) Leicht zu öffnende Folienverpackung und Verfahren zu deren Herstellung
EP1714894B1 (fr) Ruban à sceller, emballage en feuille associé et procédés pour leur fabrication
EP1629967A1 (fr) Emallage-sachet refermable de film compose
EP2857322A1 (fr) Sac et procédé de fabrication de sac
EP2857323A1 (fr) Sac d'emballage en film et procédé de fabrication d'un sac d'emballage en film
EP0258573B1 (fr) Sac d'emballage portable en feuille de plastique et son procédé de fabrication
DE2232799B2 (de) Verpackungsbehaelter
WO1980002827A1 (fr) Emballage et son procede de fabrication
DE3839143A1 (de) Beutel fuer bonbons u. dgl.
DE3907291C2 (fr)
WO2012103560A1 (fr) Sac
EP2858816B1 (fr) Stratifié de films d'emballage intégrant un ruban adhésif
EP2639182A1 (fr) Procédé de fabrication d'un emballage et emballage
DE202008015097U1 (de) Aufreißhilfe für PE-Torfsäcke
DE102021113521A1 (de) Verpackungsbeutel sowie Verfahren zur Herstellung eines Verpackungsbeutels

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20131004

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20151009