EP1588953B1 - Sac en film multicouche muni de poignées - Google Patents

Sac en film multicouche muni de poignées Download PDF

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Publication number
EP1588953B1
EP1588953B1 EP05003837A EP05003837A EP1588953B1 EP 1588953 B1 EP1588953 B1 EP 1588953B1 EP 05003837 A EP05003837 A EP 05003837A EP 05003837 A EP05003837 A EP 05003837A EP 1588953 B1 EP1588953 B1 EP 1588953B1
Authority
EP
European Patent Office
Prior art keywords
film
composite
bag
zones
sealable plastic
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
EP05003837A
Other languages
German (de)
English (en)
Other versions
EP1588953A1 (fr
Inventor
Joachim Block
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.)
Nordenia Deutschland Halle GmbH
Original Assignee
Nordenia Deutschland 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 Nordenia Deutschland Halle GmbH filed Critical Nordenia Deutschland Halle GmbH
Priority to DE502004009525T priority Critical patent/DE502004009525D1/de
Publication of EP1588953A1 publication Critical patent/EP1588953A1/fr
Application granted granted Critical
Publication of EP1588953B1 publication Critical patent/EP1588953B1/fr
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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/06—Handles
    • B65D33/08—Hand holes

Definitions

  • the invention relates to a film bag made of a two- or multi-layer composite film with a Griffausstanzung, the composite film consists of at least two connected by laminating films and wherein the bag inside film of Kaschierverbundes is a sealable plastic film with good elongation properties.
  • the term "foil bag” is intended to include both open pockets and circumferentially closed product packages. The latter can be provided with tearing aids and reclosures.
  • the invention has for its object to improve the tensile strength of the composite film in the field of Griffausstanzung.
  • the object is achieved in a film bag with the features described above in that the film surface of the composite film has functional areas in which the bond strength between the bag inside sealable plastic film and the adjoining film of Kaschierverbundes is smaller than in the functional areas surrounding area, and that the Griffausstanzung is arranged at least partially in these functional areas.
  • EP 1 129 960 discloses a Folienbenkel with the features described above.
  • the invention is based on the observation that the tear strength of the composite film is smaller than the tensile strength of the sealable plastic film used in the laminating composite.
  • a film firmly laminated to the sealable plastic film impedes the stretching of the sealable film and prevents a uniform force in this film under a tensile load.
  • zones are kept within the composite film by functional areas in which the heat-sealable plastic film and the laminated film are not connected to one another or the bond strength between the layers is reduced at least to such an extent that the films are subjected to tensile stress in a local area Separate limited area and the stretching of the sealable film in this area is not or only slightly hampered.
  • a local delamination of the film layers under tensile load which is limited to the functional areas is accepted in order to ensure the introduction of force into the sealable plastic film under load.
  • the functional areas described are assigned to sections of the grip punching on which the composite foil preferably tears when the filled foil bag is carried. These are sections in which the introduction of force preferably takes place when the foil bag is worn and the greatest tensile stresses occur. The sections depend on the shape of the Griffausstanzung and can be determined by calculation or based on less orienting experiments.
  • the handle punching is formed as a straight or arcuate cutting line, wherein the ends of the cutting line are each arranged within an associated functional area and wherein a central portion of the cutting line is introduced into a functional area surrounding film surface of the composite film whose bond strength is greater than in the functional areas.
  • the laminating composite in the functional areas has a contact surface with a pattern of well-adhering and poorly adhering zones. Due to the proportion of areas of poorly adhering zones, the bond strength is changeable.
  • the area fraction of the poorly adhering film, based on the area of the functional area is preferably more than 20%.
  • the described pattern may consist of parallel or intersecting lines or be formed by a pattern with a cellular structure. In the context of the invention, it is also the case that the sealable plastic film with the adjoining film in the functional areas is connected to one another in a point-like manner, ie the well-adhering zones of the pattern consist of punctiform surfaces.
  • a preferred embodiment of the invention provides that the sealable plastic film of the laminating outside of the functional areas has a modified by surface treatment surface to which the adjacent layer of Kaschierverbundes firmly adhered, and that on the surface portions which form the functional areas, no surface treatment was or was performed there weaker and / or this was limited to small patches that form a pattern within the functional areas.
  • Surface treatments which influence the adhesion properties of the film surface include, for example, treatment of the surface with a gas flame in excess of oxygen or an oxidizing surface treatment by corona discharges.
  • the foil is passed through an arcing area where numerous small discharges cause tiny scars on the plastic surface, altering the physical and chemical properties of the surface.
  • Another possibility for reducing the bond strength in the functional areas is that an intermediate layer is arranged between the sealable plastic film and the adjoining film of Kaschierverbundes whose adhesion to the adjacent film is smaller than the adhesion between the layers of Kaschierverbundes.
  • the intermediate layer is limited to the functional areas and consists for example of a Dephasesivlack.
  • composite films are used which consist of at least two films glued together in a planar manner, the film on the inside of the film being a sealable plastic film with good elongation properties.
  • the sealable plastic film may be a monofilm or a coextruded film.
  • films of polyethylene or polymers with comparable elongation and sealing properties are particularly advantageous in the case of the use of composite films comprising a laminating composite made of a polyethylene film as a sealable plastic film on the inside of the bag and a rigid and brittle film in comparison, in particular of polyethylene terephthalate (PET) or an oriented polypropylene.
  • PET polyethylene terephthalate
  • the outer bag-side film of the laminating composite can be printed, for example, with a counterpressure on the inner surface.
  • the in Fig. 1 shown foil bag consists of a two- or multi-layer composite foil 1 and has a Griffausstanzung 2 on.
  • the composite film 1 consists of at least two connected by laminating films 3, 4, wherein the bag inside film 3 of Kaschierverbundes a sealable plastic film with good elongation properties, eg. B. a polyethylene film is.
  • the film surface of the composite film has functional areas 5, in which the bond strength between the bag inside sealable plastic film 3 and the adjoining film 4 of Kaschierverbundes is smaller than in the functional areas 5 surrounding surface 6.
  • the functional areas 5 are visually not visible on the outside of the film and in Fig. 1 indicated for clarity only by a dashed line.
  • the Fig. 1 makes it clear that the Griffausstanzung 2 is at least partially disposed in these functional areas 5.
  • the functional regions 5, which have a reduced bond strength between the bag-inside sealable plastic film 3 and the adjacent film 4 of the laminating composite, are assigned to sections of the handle punch 2 on which the composite film 1 preferably tears when carrying the filled film bag.
  • the Griffausstanzung 2 is formed as an arcuate section line, wherein the ends of the cutting line are each arranged within an associated functional area 5.
  • the middle section a of the section line is introduced into a film surface 6 of the composite film surrounding the functional regions, whose bond strength is greater than in the functional regions 5.
  • Composite film 1 shown consists of a laminating composite of a polyethylene film as a bag inside sealable plastic film 3 and a stiff and brittle in comparison to polyester film (PET) 4, which forms the outside of the composite film.
  • PET polyester film
  • the two films are glued surface with a laminating adhesive, which is shown as an adhesive layer 7, glued.
  • the bag outer side film 4 is on the inner surface with a counter pressure, which in Fig. 2 is represented by a color layer 8, printed.
  • the composite side surface 9 of the polyethylene film has been surface treated to improve the adhesion of the adjacent adhesive layer 7.
  • the surface treatment was carried out flat, so that the laminating composite has a high bond strength between the bag-inside polyethylene film 3 and the outer Polyester film 4 has.
  • the surface treatment is limited to small area pieces 10, which within the functional areas a in Fig. 3 form a pattern.
  • the patches 10 form well-adhering zones and consist in the embodiment of Fig. 3 from point-shaped surfaces, which can be made visible by coloring the film surface.
  • the laminating compound in the functional regions 5 has a contact surface with a pattern of well-adhering zones 10 and poorly adhering zones 11, wherein the poorly adhering zones 11 should have an area fraction of more than 20% relative to the area of the functional area.
  • Diverse patterns are conceivable.
  • pattern of parallel and intersecting lines and patterns with a cellular structure are possible.
  • Fig. 4 is a three-layer Kaschierverbund shown.
  • This has a polyethylene film as a bag-inside sealable plastic film 3, a polyester film as the outside film 12 and a middle film 4, which can be determined application-specific on.
  • the middle film 4 may be, for example, a metallized polyester film.
  • the films 3, 4, 12 are glued together flat.
  • the bonding is in Fig. 4 indicated by adhesive layers 7.
  • an intermediate layer 13 is arranged, the adhesion to the adjacent film 3 is smaller than the adhesion between the layers of Kaschierverbundes.
  • the intermediate layer 13 consists for example of a Denosivlack and is limited to the functional areas 5.
  • the Descosivlack can be applied flat or possibly in the form of a pattern which has covered areas and free surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Claims (8)

  1. Sac en film constitué d'un film composé (1) bicouche ou multicouche avec une découpe de poignée (2), qui est formée en tant que ligne de coupe droite ou recourbée,
    dans lequel le film composé (1) est constitué d'au moins deux films (3, 4) liés par contre-collage et le film du côté intérieur du sac du composé contre-collé est un film scellable (3) en matière plastique ayant de bonnes propriétés d'extension,
    dans lequel la surface de film du film composé présente des régions fonctionnelles (5) dans lesquelles la résistance d'adhérence entre le film scellable (3) en matière plastique du côté intérieur du sac et le film (4) adjacent du composé contrecollé est plus faible que dans la surface (6) entourant les régions fonctionnelles (5),
    caractérisé en ce que les extrémités de la ligne de coupe formant la découpe de poignée sont disposées à chaque fois à l'intérieur d'une région fonctionnelle associée (5) qui présente une force d'adhérence réduite entre le film scellable (3) en matière plastique du côté intérieur du sac et le film adjacent (4) du composé contrecollé, et qu'un tronçon médian (a) de la ligne de coupe est incorporé dans une surface de film (6) entourant ces régions fonctionnelles, du film composé, dont la force d'adhérence est plus grande que dans les régions fonctionnelles (5).
  2. Sac en film selon la revendication 1, caractérisé en ce que le composé contre-collé dans les régions fonctionnelles (5) présente une surface de contact avec un motif constitué de zones (10) de bonne adhérence et de zones (11) de mauvaise adhérence.
  3. Sac en film selon la revendication 2, caractérisé en ce que les zones (11) de mauvaise adhérence présentent une portion de surface de plus de 20% par rapport à la surface de la région fonctionnelle (5).
  4. Sac en film selon la revendication 2 ou 3, caractérisé en ce que le motif constitué de zones (10, 11) de bonne adhérence et de mauvaise adhérence, forment un motif de lignes parallèles ou se croisant ou un motif ayant une structure en forme de cellules.
  5. Sac en film selon la revendication 2 ou 3, caractérisé en ce que les zones (10) de bonne adhérence sont constituées de surfaces en forme de points.
  6. Sac en film selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'une couche intermédiaire (13) est disposée entre le film scellable (3) en matière plastique et le film (4) adjacent à celui-ci du composé contre-collé, couche dont l'adhérence au film contigu (3) est inférieure à l'adhérence entre les couches du composé contre-collé, la couche intermédiaire (13) étant limitée aux régions fonctionnelles (5).
  7. Sac en film selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le film composé (1) présente un composé contre-collé constitué d'un film de polyéthylène en tant que film scellable (3) en matière plastique du côté intérieur du sac et d'un film comparativement fragile et rigide par rapport à celui-ci, en particulier constitué de polyéthylène téréphtalate (PET) ou d'un polypropylène orienté.
  8. Sac en film selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le film du côté extérieur du sac du film composé est imprimé avec une contre-pression sur la surface intérieure.
EP05003837A 2004-03-08 2004-03-08 Sac en film multicouche muni de poignées Expired - Lifetime EP1588953B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE502004009525T DE502004009525D1 (de) 2004-03-08 2004-03-08 Folienbeutel aus einer zwei- oder mehrlagigen Verbundfolie mit einer Griffausstanzung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04005425A EP1574447B1 (fr) 2004-03-08 2004-03-08 Sac en film multicouche muni de poignées

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP04005425.6 Division 2004-03-08
EP04005425A Division EP1574447B1 (fr) 2004-03-08 2004-03-08 Sac en film multicouche muni de poignées

Publications (2)

Publication Number Publication Date
EP1588953A1 EP1588953A1 (fr) 2005-10-26
EP1588953B1 true EP1588953B1 (fr) 2009-05-27

Family

ID=34814255

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05003837A Expired - Lifetime EP1588953B1 (fr) 2004-03-08 2004-03-08 Sac en film multicouche muni de poignées
EP04005425A Expired - Lifetime EP1574447B1 (fr) 2004-03-08 2004-03-08 Sac en film multicouche muni de poignées

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04005425A Expired - Lifetime EP1574447B1 (fr) 2004-03-08 2004-03-08 Sac en film multicouche muni de poignées

Country Status (7)

Country Link
EP (2) EP1588953B1 (fr)
AT (2) ATE396119T1 (fr)
DE (2) DE502004009525D1 (fr)
DK (1) DK1574447T3 (fr)
ES (1) ES2302991T3 (fr)
PL (1) PL1574447T3 (fr)
WO (1) WO2005085080A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2100721T3 (pl) 2008-03-11 2014-09-30 Amcor Flexibles Kreuzlingen Laminat z obszarem o poprawionej odporności na rozdarcie
DE202010005231U1 (de) * 2010-04-16 2010-09-30 Kobusch-Sengewald Gmbh & Co. Kg Laminat aus Schichtmaterial unterschiedlicher Reissfestigkeit
DE102011002315A1 (de) * 2011-04-28 2012-10-31 Nordenia Technologies Gmbh Folienverpackung, insbesondere für Feuchttücher
JPWO2023026722A1 (fr) * 2021-08-24 2023-03-02

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2633793A1 (de) * 1976-07-28 1978-02-02 Bosch Gmbh Robert Beutelpackung mit grifflasche
DE3232321A1 (de) * 1982-08-31 1984-03-01 Bischof Und Klein Gmbh & Co, 4540 Lengerich Trageverpackung aus flexiblem werkstoff in sack- oder beutelform
EP0266670B1 (fr) * 1986-11-05 1992-03-04 Stiegler Gmbh Maschinenfabrik Sac de transport en feuille de matière thermoplastique
ITMI20000289A1 (it) * 2000-02-18 2001-08-18 Goglio Spa Luigi Milano Contenitore in materiale flessibile con maniglia rinforzata per evitare lacerazioni

Also Published As

Publication number Publication date
EP1574447A1 (fr) 2005-09-14
DE502004009525D1 (de) 2009-07-09
DE502004007219D1 (de) 2008-07-03
ATE396119T1 (de) 2008-06-15
EP1574447B1 (fr) 2008-05-21
PL1574447T3 (pl) 2008-10-31
WO2005085080A3 (fr) 2005-12-22
ES2302991T3 (es) 2008-08-01
WO2005085080A2 (fr) 2005-09-15
EP1588953A1 (fr) 2005-10-26
ATE432226T1 (de) 2009-06-15
DK1574447T3 (da) 2008-09-15

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