EP2991911A1 - Sac en papier - Google Patents

Sac en papier

Info

Publication number
EP2991911A1
EP2991911A1 EP14718510.2A EP14718510A EP2991911A1 EP 2991911 A1 EP2991911 A1 EP 2991911A1 EP 14718510 A EP14718510 A EP 14718510A EP 2991911 A1 EP2991911 A1 EP 2991911A1
Authority
EP
European Patent Office
Prior art keywords
bag
paper
layer
overlap
coated paper
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.)
Granted
Application number
EP14718510.2A
Other languages
German (de)
English (en)
Other versions
EP2991911B1 (fr
Inventor
Eduard Lisek
Gerhard Schulte
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.)
Dy Pack Verpackungen Gustav Dyckerhoff GmbH
Original Assignee
Dy Pack Verpackungen Gustav Dyckerhoff 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 Dy Pack Verpackungen Gustav Dyckerhoff GmbH filed Critical Dy Pack Verpackungen Gustav Dyckerhoff GmbH
Publication of EP2991911A1 publication Critical patent/EP2991911A1/fr
Application granted granted Critical
Publication of EP2991911B1 publication Critical patent/EP2991911B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D31/00Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D31/00Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/04Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D31/00Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14Valve bags, i.e. with valves for filling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D31/00Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14Valve bags, i.e. with valves for filling
    • B65D31/147Valve bags, i.e. with valves for filling the filling port being provided in a side wall
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/01Ventilation or drainage of bags

Definitions

  • the invention relates to a paper bag, preferably a valve paper bag, for bulk material such as cement, gypsum, granules, animal feed o. ⁇ ., With a bottom, preferably a cross or block bottom, and with a bottom opposite the top, in which optionally a valve tube is arranged to fill the paper bag.
  • a paper bag preferably a valve paper bag, for bulk material such as cement, gypsum, granules, animal feed o. ⁇ .
  • a bottom preferably a cross or block bottom, and with a bottom opposite the top, in which optionally a valve tube is arranged to fill the paper bag.
  • Such paper sacks are known, for example from EP 1 858 769 B1.
  • the usual sizes are 5 kg, 10 kg or 25 kg. They have one or more paper layers which are formed from paper or a paper composite and / or coated paper.
  • a valve tube is optionally provided, which is incorporated in the upper part and is plugged for filling on a filler neck.
  • Essential for a quick and economical filling is a rapid escape of the air during the filling process.
  • the bag should be as tight as possible after filling.
  • a barrier layer between an inner layer and an outer layer of paper be inserted.
  • Such sensitive products are, for example, fast-binding products in the field of building materials or food, in which a loss of flavor must be prevented.
  • the paper sacks according to the invention have a coated paper layer with a facing inside the bag coating, which is gas-tight, so forms a good seal against gas passage, in particular against the passage of air oxygen, CO2 or gaseous water. Furthermore, the coated paper layer has an overlap, wherein the overlapping edges preferably run parallel to the side edges of the paper bag, so that the overlap Pung extending in the manner of an overlap strip from the bottom to the top.
  • the overlap of the coated paper layer to the interior of the bag is sealingly bonded, ie in the region of the overlap, the inner layer facing the interior of the bag is glued to the layer of the coated paper layer facing the outside of the bag, and the bond is in the edge region of the overlap Sack interior out.
  • the bonding directly on the edge of the overlap is advantageous, but the bond must not be located directly on the edge of the overlap to the bag interior. Rather, it may be moved away from the edge of the overlap, because even in this case, the intended purpose according to the invention can still be achieved.
  • the layer of the coated paper layer facing the interior of the bag has perforations in the region of the overlap, which are covered by the overlapping position facing the exterior of the bag. Through these perforations air can escape during filling of the bag and escape to the outside of the overlap, since the obstructive for the air flow bonding is arranged to the bag interior.
  • the bonding to the interior of the bag thus has a steering effect for the air flow, as well as a stabilizing effect for the coated paper layer in the region of the overlap, thus serving to hold the material ends together in the region of the overlap. It can thereby be achieved that the air exiting through the perforations during filling exits completely outwards from the region of overlap.
  • the stability in the overlap area is improved and the tightness in the filled state. Furthermore, the leakage of filling material can be avoided by the overlap. By a suitable choice of the sizes of the perforation openings can be ensured that the respective contents are retained in the bag, while the air escapes through the perforations. When the bag is completely filled, the perforations in the region of the overlap are covered by the outer layer of the inner layer, so that the penetration of substances from the outside is avoided.
  • the inventive design a good ventilation during filling is achieved with a high product protection and prolonged product stability of the medium.
  • the gas-tight coating avoids the risk of air erstoff, CO2 or gaseous water in relevant quantities from the outside penetrate and damage or destroy the contents. These gases are primarily responsible for damage to sensitive products or for the lower storage stability of such products. Since the gas-tight coating forms the surface of the bag wall which is in contact with the filling material, there is no paper layer in contact with the filling material, from which residual moisture could diffuse into the filling material.
  • a wider overlap area allows a larger area of perforations in the overlap area and thus better venting when filling.
  • a disadvantage of a larger overlap area is the higher material costs for the inner layer.
  • the overlap of the inner layer is at least 3% of the bag circumference, more advantageously at least 10% of the bag circumference and even more advantageously at least 17% but at most 25% of the bag circumference
  • the gas-tight coating has a multilayer structure.
  • the coating preferably comprises a metallized film and / or a metal foil.
  • a particularly good gas tightness can be achieved.
  • Very suitable as a metallic material is aluminum.
  • the metallic gas barrier ensures particularly good aroma protection in the food industry.
  • the gas-tight coating also forms a barrier to liquids, so that a seal against the ingress of water is achieved.
  • the perforations are formed on the inside or in the inner layer of the overlap by needling and / or one or more slits.
  • the perforations are formed as microperforations, which can be produced for example by electrical or chemical means and are known from cigarette paper.
  • additional adhesions are additionally present in a central region and / or in the edge region of the overlap to the exterior of the bag. These bonds further stabilize the overlap area. These bonds are permeable to the exterior of the bag formed, advantageously by interrupted lines of glue along the edge of the overlap to the bag exterior.
  • the paper bag has a plurality of overlaps according to the invention, particularly preferably an overlap according to the invention on the front side of the bag and a further overlap according to the invention on the back of the bag.
  • the ventilation of the bag can be improved during filling and distributed to both sides.
  • the paper bag according to the invention has, outside the coated paper layer, further paper layers or layers of other materials suitable for bag production. These layers must also be designed so that they allow the air to escape to the outside during filling.
  • Suitable materials for bag making are preferably paper, coated paper, film and / or coated film.
  • FIG. 1 shows a schematic plan view of a valve bag according to the invention with bottom and top
  • FIG. 2a shows a schematic cross section through the bag according to the invention according to FIG. 1, along the line A-A from FIG. 1
  • FIG. 2b the inner coated paper layers 20 of the bag according to FIG.
  • FIG. 3 shows a tube section from the coated paper layer 20 of a bag according to the invention
  • Fig. 4 a tube portion of the coated paper layer 20 of a
  • Valve bag according to a first embodiment of the invention
  • Fig. 5 a hose portion of the coated paper layer 20 of a
  • Valve bag according to a second embodiment of the invention.
  • FIG. 1 shows a paper bag 10 according to the invention with a cross bottom 12 and an upper part 14, the bottom 12 and the upper part 14 being folded onto the front side 16 of the paper bag 10. Not recognizable is the back of the bag, which is below the front 16.
  • a valve tube 15 is inserted in the upper part 14.
  • This paper bag is made of an inner coated paper layer 20 and an outer layer 18 of paper or a paper composite.
  • the overlap 19 of the outer layer is kept narrow and glued, so that the outer layer between the bottom 12 and upper part 14 forms a tube section.
  • the overlap 22 of the inner layer of coated paper 20 is wider and glued to the gluing 24 to the bag interior.
  • the coated paper ply 20 also forms a tube section between the bottom 12 and top 14 where the overlap 22 extends as a strip from the bottom 12 to the top 14.
  • FIG. 2b shows the inner coated paper layer 20 with an enlarged section of the overlap 22.
  • the layer 34 of the coated paper layer 20 facing the interior of the bag overlaps with the layer The outer layer 36 of the coated paper layer 20.
  • the overlap 22 is glued sealingly by means of the adhesive bond 24.
  • FIG. 2c shows the layer structure of the inner coated paper layer 20.
  • the coated paper layer 20 On its outer side, the coated paper layer 20 has a carrier layer 41 made of paper. Inwardly, the next layer is followed by a metallization 42, which is preferably formed from aluminum.
  • the metallization 42 is protected by a plastic coating which consists in its core 43 of PET (polyethylene terephthalate) or comparable plastics.
  • the core 43 is provided on both sides with a surface layer or surface treatment 44. Between the metallization 42 and surface treatment 44 is a lacquer layer 45.
  • a corona pretreatment 46 On the outer surface treatment 44 is a corona pretreatment 46, which then forms the innermost layer towards the interior of the bag.
  • the plastic coating applied to the metallic gas barrier protects the metal layer against damage during the manufacture of the bag.
  • FIG. 3 shows a schematic top view of the tube section of the coated paper layer 20.
  • the overlap 22 of the paper layer 20 is limited to the interior of the bag by the inside edge 26 and to the outside of the bag by the outside edge 28.
  • FIG. 4 shows the configuration of the overlapping region 22 of the paper layer 20 according to a first exemplary embodiment of the invention.
  • the overlapping region is glued sealingly to the interior of the bag with a continuous glue line 24.
  • the outer edge 28 of the overlap is loose, that is not glued.
  • the layer 34 of the paper layer 20 facing the interior of the bag is perforated.
  • the perforation 38 which is shown in Figure 4 with a cross, runs in the same way as the overlap as a strip from the bottom 12 to the top 14.
  • the width B2 of the perforation strip is about half the width B1 of the overlap strip 20.
  • the turned to the outside of the bag Layer 36 of the paper layer 20 has no perforations in the overlap area. As a result, the perforations 38 are covered.
  • the overlap along the outer edge 28 is glued to a broken glue line 32. As a result, the overlap on the outer edge 28 is stabilized.
  • the paper bag can be well vented during filling, and by the gas-tight coating on the inside of the bag and the overlap of the vent perforations in the filled bag high product protection and prolonged product stability of the filling is achieved.
  • the manufacture of the bag is simplified compared to the prior art EP 1 858 769 B1, since no separate barrier layer has to be inserted between two paper layers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)

Abstract

La présente invention concerne un sac en papier (10) destiné à un produit en vrac tel que du ciment, du plâtre, des granulés, des aliments pour animaux ou similaires. Ledit sac en papier comporte un fond (12), de préférence un fond plat ou hexagonal, et une partie supérieure (14), opposée au fond, dans laquelle un robinet (15) est éventuellement disposé pour remplir le sac en papier. Le sac en papier comporte une couche de papier enduite (20) qui comporte un enduit étanche aux gaz dirigé vers l'intérieur du sac. L'enduit forme la surface de la paroi intérieure du sac en papier qui est en contact avec le produit de remplissage. La couche de papier enduite comporte un recouvrement (22) qui est collé de manière étanche en direction de l'intérieur du sac. Dans la zone du recouvrement, une couche de la couche de papier enduite qui est dirigé vers l'intérieur comporte des perforations (38) qui sont recouvertes par la couche de la couche de papier enduite qui est dirigé vers l'extérieur du sac.
EP14718510.2A 2013-04-30 2014-04-10 Sac en papier Active EP2991911B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013004058.0U DE202013004058U1 (de) 2013-04-30 2013-04-30 Papiersack
PCT/EP2014/000966 WO2014177248A1 (fr) 2013-04-30 2014-04-10 Sac en papier

Publications (2)

Publication Number Publication Date
EP2991911A1 true EP2991911A1 (fr) 2016-03-09
EP2991911B1 EP2991911B1 (fr) 2017-02-01

Family

ID=50543008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14718510.2A Active EP2991911B1 (fr) 2013-04-30 2014-04-10 Sac en papier

Country Status (8)

Country Link
US (1) US10071834B2 (fr)
EP (1) EP2991911B1 (fr)
JP (1) JP6454688B2 (fr)
CN (1) CN105228913B (fr)
DE (1) DE202013004058U1 (fr)
HK (1) HK1220957A1 (fr)
MX (1) MX2015015080A (fr)
WO (1) WO2014177248A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014000194U1 (de) * 2014-01-10 2015-04-14 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Papiersack
NO2768978T3 (fr) * 2014-02-20 2018-04-21
ES2582611B1 (es) * 2015-03-13 2017-06-07 Industrias Bolcar, S.A. Saco multicapa con salida de presión
DE102016220428A1 (de) 2016-09-27 2018-03-29 Windmöller & Hölscher Kg Ventilsack sowie Verfahren und System zur Herstellung eines Ventilsacks

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085737A (en) * 1962-04-25 1963-04-16 Olin Mathieson Bag with interrupted longitudinal seam
US3309006A (en) * 1966-02-16 1967-03-14 Bemis Co Inc Plastic bags
JPS4886010U (fr) * 1972-01-18 1973-10-18
JPS5410415U (fr) * 1977-06-24 1979-01-23
JPS5643740U (fr) * 1979-09-14 1981-04-21
SE8002709L (sv) * 1980-04-10 1981-10-11 Vitrum Ab Forpackning
DE4303894C2 (de) * 1993-02-10 1996-05-09 Haver & Boecker Verfahren zum Herstellen eines mit einem Schüttgut füllbaren, im Leerzustand flachen Packmittel
CN2318153Y (zh) 1997-09-04 1999-05-12 俞步新 纸塑纸复合水泥袋
DE20200332U1 (de) 2002-01-10 2002-05-23 Dy Pack Verpackungen Gustav Dy Nadelkopf zum Nadeln von Bahnmaterial
US6803113B2 (en) * 2002-09-13 2004-10-12 Honeywell International Inc. High barrier antifog laminate for case ready meat packaging
DE102004013469A1 (de) * 2004-03-18 2005-10-06 Wacker Polymer Systems Gmbh & Co. Kg Mehrwandiges, sackförmiges Verpackungsmittel
JP2006137450A (ja) * 2004-11-11 2006-06-01 Lion Corp 穀類包装用紙袋
DE202005003539U1 (de) 2005-03-04 2006-07-13 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Papiersack
JP2009500251A (ja) * 2005-07-08 2009-01-08 スターリンガー ウント コムパニー ゲゼルシャフト ミット ベシュレンクテル ハフツング 通気可能な袋
US8282539B2 (en) * 2008-12-22 2012-10-09 Exopack, Llc Multi-layered bags and methods of manufacturing the same
ATE468276T1 (de) 2008-03-10 2010-06-15 Billeruds Ab Zweischichten-papiersack
WO2011029597A1 (fr) * 2009-09-11 2011-03-17 Tetra Laval Holdings & Finance S.A. Film thermoscellable à revêtement barrière à stabilité thermique et mécanique, stratifié d'emballage comportant le film, récipient d'emballage formé à partir du stratifié d'emballage et procédé pour la production du film

Also Published As

Publication number Publication date
HK1220957A1 (zh) 2017-05-19
JP6454688B2 (ja) 2019-01-16
JP2016520487A (ja) 2016-07-14
EP2991911B1 (fr) 2017-02-01
CN105228913B (zh) 2017-05-10
US10071834B2 (en) 2018-09-11
MX2015015080A (es) 2016-02-25
WO2014177248A1 (fr) 2014-11-06
US20160083144A1 (en) 2016-03-24
DE202013004058U1 (de) 2014-08-01
CN105228913A (zh) 2016-01-06

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