EP2845820B1 - Seitenfaltenbeutel aus einem Kunststoffgewebeverbund - Google Patents

Seitenfaltenbeutel aus einem Kunststoffgewebeverbund Download PDF

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Publication number
EP2845820B1
EP2845820B1 EP14180177.9A EP14180177A EP2845820B1 EP 2845820 B1 EP2845820 B1 EP 2845820B1 EP 14180177 A EP14180177 A EP 14180177A EP 2845820 B1 EP2845820 B1 EP 2845820B1
Authority
EP
European Patent Office
Prior art keywords
bag
gusset
rear panel
corner
front panel
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.)
Not-in-force
Application number
EP14180177.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2845820A1 (de
Inventor
Jens Kösters
Jochen Brauer
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.)
Mondi Halle GmbH
Original Assignee
Mondi Halle 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 Mondi Halle GmbH filed Critical Mondi Halle GmbH
Priority to CA2860714A priority Critical patent/CA2860714A1/en
Priority to BR102014021673-1A priority patent/BR102014021673A2/pt
Priority to US14/474,431 priority patent/US20150078684A1/en
Priority to MX2014010476A priority patent/MX345844B/es
Publication of EP2845820A1 publication Critical patent/EP2845820A1/de
Application granted granted Critical
Publication of EP2845820B1 publication Critical patent/EP2845820B1/de
Priority to US15/382,620 priority patent/US9926107B2/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • B65D29/02—Sacks with laminated or multiple walls
    • 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
    • B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • 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
    • B65D33/01—Ventilation or drainage of bags

Definitions

  • the invention relates to a gusseted bag made of a plastic fabric composite, according to the preamble of claim 1.
  • the gusseted bag comprises a front panel, a rear panel and gussets disposed between the front panel and the rear panel connected by fold edges to the front panel and back panel.
  • the gusseted bag is made of a plastic fabric composite, which has a polymer film on the outside of the bag and a polymer tape connected to the polymer film on the inside of the bag.
  • the fabric and the polymer film on the outside of the bag are connected to one another in a flat manner and form a strong plastic fabric composite.
  • the flat side gusset bag is closed at one end by a portion of the front panel and gusset portions disposed between the portion of the front panel and the back panel folded over and joined to the back panel to form a bottom gusset.
  • front and rear walls form equivalent bag surfaces.
  • the designation of these bag surfaces as a “front wall” and “back wall” is intended to facilitate the understanding of the teaching of the invention and should not represent a material limitation.
  • that bag surface on which are folded and fixed in the formation of the bottom surface film sections referred to as a "back wall”.
  • the flat gusseted bag can be filled at the open end and closed after filling.
  • the filled gusseted bag is intended as a packaging bag, in particular for pourable products such as pelleted pet food, litter for animals or similar materials.
  • Side gusset bag is suitable by the use of a plastic fabric composite, especially for large containers, which have a considerable filling volume and a considerable filling weight.
  • Corresponding gusseted bags are referred to in practice as gusseted bags, these terms are not distinguished in the context of the present invention.
  • Gusseted bags of single or multi-ply foils that are not reinforced by a fabric often have a bottom surface formed by seal seams.
  • the sealing seams extend from a folded edge on longitudinal sides of the front or rear wall at an oblique angle in the direction of the bottom fold.
  • the seal seams also referred to as corner seals, cause the bottom of the gusseted bag to better form a flat bottom surface when the gusseted bag is filled with a product.
  • the poor soil formation also has a negative effect on the container volume, since the level increases when the soil is not properly positioned and this by a higher bag height must be considered.
  • the problem occurs especially in flat side gusseted bags with deep gussets, which form after filling cuboidal packaging.
  • the fabric In order to be able to attach sealing seams for shaping the bottom surface on side-folding bags which are made of a plastic fabric composite, the fabric must be provided over its entire surface or at least in sections with a sealable coating which is produced, for example, by an extrusion coating or by applying a hot-melt adhesive.
  • a sealable coating which is produced, for example, by an extrusion coating or by applying a hot-melt adhesive.
  • the use of coated webs of monoaxially drawn polymer ribbons and a sealable polymer coating for making sacks is lacking EP 2 188 438 B1 known.
  • the coating of the fabric surface of a plastic fabric composite material to improve the sealing properties is technically complex and requires an additional and associated with correspondingly higher cost of material.
  • the GB 1 162 013 A shows a stand-up pouch with a gusset, arranged therein, formed from a plurality of welds at an oblique angle Ecksch spanaht.
  • the object of the invention is to design a gusset bag made of a plastic fabric composite in such a way that it has a flat and stable bottom surface after filling.
  • the object of the invention and solution of this problem is a gusseted bag according to claim 1.
  • the invention requires a gusseted bag made of a plastic fabric composite with a front wall, a rear wall and disposed between the front wall and the rear wall gussets, which are connected by folding edges with the front wall and the rear wall. A portion of the front wall, as well as gusset portions disposed between the portion of the front wall and the rear wall, are folded over and connected to the back wall to form a bottom fold.
  • the gusseted bag which can be produced by folding a flat material web consists of a plastic fabric composite which has a polymer film on the outside of the bag and a fabric made of polymer tapes connected to the polymer film on the inside of the bag. The polymer film and the fabric are firmly bonded together forming a strong bond.
  • the fabric is untreated and has no sealable coating on the inside of the bag.
  • the bag inner side fabric surface of the gussets are connected to the adjacent fabric surface of the front wall or rear wall by Ecksch lovednähte extending from a folded edge on the longitudinal sides of the front or rear wall at an oblique angle in the direction of the bottom fold.
  • the corner welds a have produced by ultrasonic welding structure with a screening of a plurality of punctiform or linear welds. According to a screening of a plurality of successively and juxtaposed welding points is provided.
  • the seam strength of the corner welds in the longitudinal and transverse direction of the corner welds is uniform.
  • no significant embrittlement occurs at the seam edges of the corner welds, as can often be observed in heat sealing of polymeric films using heat seal jaws.
  • the Ecksch span dealtte extend appropriately to the bottom fold.
  • the corner welds are aligned so that they enclose an angle between 30 ° and 60 ° with the bottom fold.
  • the corner weld seams with the bottom fold and one edge-side fold edge each delimit an isosceles triangular surface.
  • the fabric of the plastic fabric composite may in particular consist of a braid of ribbon-shaped polymer strips.
  • the polymer strips of the braid preferably have a width of between 2 mm and 5 mm in the longitudinal direction of the bag and in the transverse direction of the bag, and the polymer strips of the braid extending in the longitudinal direction of the bag and in the transverse direction of the bag may in particular also have substantially the same width.
  • the corner welds are expediently 2 mm to 10 mm wide, wherein the grid can include 10 to 500 weld points based on an area of 100 mm 2 .
  • the welds of the corner welds are preferably arranged on parallel lines, which are aligned at an angle of 45 ° to the longitudinal extent of the Ecksch spanähte. On each line at least three welds are arranged at equidistant intervals next to each other.
  • the plastic fabric composite is usually made of polyolefinic components, wherein the polymer film on the outside of the bag is preferably a polypropylene film and in particular consists of a biaxially oriented polypropylene (BOPP). Alternatively, the polymer film on the outside of the bag can also consist of a polyester or polyamide (OPET, OPA).
  • the fabric on the inside of the bag has monoaxially drawn polymer ribbons which are woven together and can be welded on the surface. The fabric then has orientations in the longitudinal and transverse directions.
  • the lower edge of the front wall, the lower edge of the edge of the side folds adjacent to the front wall, the lower edge of the edge of the side folds adjacent to the rear wall and the lower edge of the rear wall are expediently offset in a fan-shaped manner, so that the layers of the plastic fabric composite folded over along the bottom fold respectively have a portion which rests directly on the rear wall and is preferably glued to the rear wall.
  • the gusseted bag receives a stable bottom surface, which forms a substantially flat and stable bottom surface after filling the gusseted bag.
  • the gusseted bag according to the invention is suitable for large containers and for packaging bulk material with a high bulk density.
  • the Fig. 1 and 2 show a flattened gusseted bag with a front wall 1, a rear wall 2 and arranged between the front wall and the rear wall gussets 3, by folding edges 4 with the front wall 1 and the rear wall 2 are connected.
  • the gusseted bag is formed from a flat sheet of material by folding.
  • An overlap region 5, which is arranged in the exemplary embodiment on the rear wall 2, is closed by a bond.
  • the gusseted bag is open and can be filled in bottling plants with a pourable filling material.
  • the gusseted bag is closed, wherein the closed end forms a flat bottom surface when filling the gusseted bag.
  • the bottom surface is formed by a portion 6 of the front wall and gusset portions 7, which are arranged between the portion 6 of the front wall 1 and the rear wall 2, folded over to form a bottom fold 8 on the rear wall 2 and connected to the rear wall 2.
  • Ecksch span dealtte 9 are provided extending from an outer folding edge 4 on the longitudinal sides of the front or rear wall 1, 2 at an oblique angle in the direction of the bottom fold 8.
  • the Ecksch donen dealtte 9 may include with the bottom fold 8 an angle ⁇ between 30 ° and 60 °.
  • the corner weld seams 9 bound with the bottom fold 8 and a marginal folding edge 4 each have an isosceles triangular surface.
  • the gusseted bag shown in the figures is made of a plastic fabric composite.
  • the plastic fabric composite is formed at least two layers and has a polymer film 10 on the outside of the bag and a bonded to the polymer film 10 fabric 11 of polymer tapes 12, 13 on the inside of the bag.
  • the polymer film 10 is firmly bonded to the fabric 11.
  • the plastic fabric composite is made for example of polyolefinic components.
  • the fabric 11 consists of a network of ribbon-shaped polymer strips 12, 13, wherein the polymer strips 12 in the bag longitudinal direction and the polymer strips 13 in the bag transverse direction, for example, a width between 2 mm and 5 mm.
  • the polymer strips 12, 13 of the braid extending in the longitudinal direction of the bag and in the transverse direction of the bag have substantially the same width.
  • the corner welds 9 are produced according to the invention by ultrasonic welding and have a structure produced by ultrasonic welding with a grid of a plurality of successively arranged and juxtaposed welds 14.
  • the welding points 14 connect the bag inner side fabric surface of the gussets 3 with the adjacent fabric surface of the front wall 1 or rear wall 2.
  • the generated by ultrasonic welding structure of the corner welds as an array of linear welds, the weld lines, for example, parallel are aligned or intersect.
  • the process principle for producing the corner welds 9 by ultrasonic welding is in Fig. 5 shown.
  • a generator high-frequency alternating current is generated and transmitted to an ultrasonic transducer, which generates a mechanical ultrasonic frequency.
  • the high-frequency mechanical vibrations of a sonotrode 15 are transferred under pressure to the polymer surfaces to be joined.
  • the vibrations cause ultrasonic and interfacial friction in the joining zone during ultrasonic welding.
  • As shown in Fig. 5 engages an abutment 16 for the sonotrode 15 at the edge in the spread gussets 3 a.
  • the ultrasonic sealing has the advantage that the welding times are short and the thermal energy largely arises in the contact areas, whereby other laminate areas and in particular the oriented polymer tapes 12, 13 of the fabric 11 are loaded with less heat.
  • the corner welds 9, as shown in FIG Fig. 4 each have a width between 2 mm and 10 mm, wherein the screening suitably 10 to 500 weld points 14 based on an area of 100 mm 2 includes.
  • the Ecksch resumenaht 9 is about 4 mm wide and is composed of about 100 welds based on an area of 100 mm 2 together.
  • the representation in Fig. 4 It can also be seen that the welding points 14 of the corner welds 9 are arranged on parallel lines 17, which are aligned at an angle ⁇ of 45 ° to the longitudinal extent of the corner welds 9. On each line 17 at least three welds 14 are arranged at equidistant intervals next to each other.
  • Fig. 8 is in at least one limited by a corner weld 9 triangular bag section 7 'a vent opening 24 is arranged. Between the provided with the vent opening 24 bag portion 7 'and the filling space of the gusseted bag an air exchange is ensured.
  • the air exchange is indicated by arrows.
  • the air exchange is possible because the corner weld seam 9 maintains a distance from the bottom fold 8 and the folding edge 4 at the longitudinal side of the bag.
  • the corner weld may be interrupted, for example, to prevent the air exchange between the To ensure or promote triangular bag portion 7 'and the filling space of the gusseted bag.
  • the Ecksch span dealtte 9 cause when filling the gusseted bag a good Bodenausformung. After filling and closure of its upper end, the gusseted bag forms a substantially parallelepipedic package with a flat, stable bottom surface, as shown in FIG Fig. 6 is shown.
  • the gusseted bag made of a plastic fabric composite can be used for packaging bulk goods such as pelleted pet food, litter for animals or similar materials and is suitable as a bag especially for large containers, which have a considerable filling volume and a considerable filling weight.
  • the bottom surface must withstand during loading and handling of the bag a large load.
  • the material layers are preferably glued together. With regard to a fixed adhesive connection, it is expedient if the film layers to be bonded together to form a bottom surface have an edge profile with the in Fig. 7 have shown contour.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP14180177.9A 2013-09-04 2014-08-07 Seitenfaltenbeutel aus einem Kunststoffgewebeverbund Not-in-force EP2845820B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA2860714A CA2860714A1 (en) 2013-09-04 2014-08-27 Side-gusset bag made of a plastic fabric laminate
BR102014021673-1A BR102014021673A2 (pt) 2013-09-04 2014-09-01 Sanfonado bag of a synthetic fabric composite
US14/474,431 US20150078684A1 (en) 2013-09-04 2014-09-02 Side-gusset bag made of a plastic film/fabric laminate
MX2014010476A MX345844B (es) 2013-09-04 2014-09-02 Bolsa de pliegues laterales hecha de un material compuesto de tejido de material sintetico.
US15/382,620 US9926107B2 (en) 2013-09-04 2016-12-17 Side-gusset bag made of a plastic film/fabric laminate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013109656.5A DE102013109656A1 (de) 2013-09-04 2013-09-04 Seitenfaltenbeutel aus einem Kunststoffgewebeverbund

Publications (2)

Publication Number Publication Date
EP2845820A1 EP2845820A1 (de) 2015-03-11
EP2845820B1 true EP2845820B1 (de) 2016-06-22

Family

ID=51266213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14180177.9A Not-in-force EP2845820B1 (de) 2013-09-04 2014-08-07 Seitenfaltenbeutel aus einem Kunststoffgewebeverbund

Country Status (9)

Country Link
US (1) US20150078684A1 (pt)
EP (1) EP2845820B1 (pt)
BR (1) BR102014021673A2 (pt)
CA (1) CA2860714A1 (pt)
DE (1) DE102013109656A1 (pt)
ES (1) ES2587521T3 (pt)
HU (1) HUE030966T2 (pt)
MX (1) MX345844B (pt)
PL (1) PL2845820T3 (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3858755A1 (de) 2020-02-03 2021-08-04 Mondi AG Seitenfaltenbeutel

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013003223A1 (de) * 2013-02-27 2014-08-28 Haver & Boecker Ohg Packmaschine und Verfahren zum Füllen von Offensäcken
AU2016407018B2 (en) * 2016-05-18 2023-02-02 Mti Group Pty Ltd Composite thermoplastic liner
US10736391B2 (en) * 2016-10-10 2020-08-11 Yeti Coolers, Llc Bag
USD853115S1 (en) 2018-01-22 2019-07-09 Yeti Coolers, Llc Duffel bag
USD851400S1 (en) 2018-03-08 2019-06-18 Yeti Coolers, Llc Duffel bag
DE102018109069A1 (de) * 2018-04-17 2019-10-17 International Automotive Components Group Gmbh Verfahren zur Herstellung eines Verkleidungsteils, Einrichtung zur Herstellung eines Umbugs an einem Verkleidungsteil und Verkleidungsteil
EP4079655A1 (de) 2021-04-23 2022-10-26 Mondi AG Verpackungsbeutel sowie verfahren zur herstellung

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US3507443A (en) * 1968-07-01 1970-04-21 Jiffy Mfg Co Ventilated multi-ply bag
US4240363A (en) * 1979-08-03 1980-12-23 Troy Stephen R Incinerator bag
US4373979A (en) 1980-09-26 1983-02-15 Workman Bag Company Ltd. Sealed bags of plastic materials
NL8201684A (nl) * 1982-04-22 1983-11-16 Wavin Bv Kunststofzak met harmonikavouwen met perforaties.
US4473432A (en) * 1983-02-04 1984-09-25 Harold Leader Dot heat stapling
DE3705891A1 (de) * 1986-04-23 1987-10-29 Windmoeller & Hoelscher Seitenfaltensack aus thermoplastischer kunststoffolie mit entlueftungsoeffnungen
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ES2246275T3 (es) * 2000-07-28 2006-02-16 WINDMOLLER & HOLSCHER Procedimiento para el cierre de un saco lleno, provisto con pliegues laterales de material termoplastico.
DE202004007862U1 (de) * 2004-05-15 2004-08-12 Nordfolien Gmbh Verpackung für loses Schüttgut, insbesondere für Torf-, Erden- und Düngerprodukte o.dgl. Bodenverbesserungsmittel
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AT9823U1 (de) 2007-09-10 2008-04-15 Starlinger & Co Gmbh Beschichtetes gewebe aus monoaxial verstreckten kunststoffbändchen und daraus hergestellter sack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3858755A1 (de) 2020-02-03 2021-08-04 Mondi AG Seitenfaltenbeutel

Also Published As

Publication number Publication date
BR102014021673A2 (pt) 2017-12-12
US20150078684A1 (en) 2015-03-19
DE102013109656A1 (de) 2015-03-05
CA2860714A1 (en) 2015-03-04
ES2587521T3 (es) 2016-10-25
EP2845820A1 (de) 2015-03-11
PL2845820T3 (pl) 2016-12-30
HUE030966T2 (en) 2017-06-28
MX345844B (es) 2017-02-20
MX2014010476A (es) 2015-05-07

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