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EP2032454B1 - Film bag - Google Patents

Film bag Download PDF

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Publication number
EP2032454B1
EP2032454B1 EP07764729A EP07764729A EP2032454B1 EP 2032454 B1 EP2032454 B1 EP 2032454B1 EP 07764729 A EP07764729 A EP 07764729A EP 07764729 A EP07764729 A EP 07764729A EP 2032454 B1 EP2032454 B1 EP 2032454B1
Authority
EP
European Patent Office
Prior art keywords
bag
sealing seam
film
side fold
film 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.)
Active
Application number
EP07764729A
Other languages
German (de)
French (fr)
Other versions
EP2032454A1 (en
EP2032454B2 (en
Inventor
Marcus Kujat
Alfons Kruse
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38135905&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2032454(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mondi Halle GmbH filed Critical Mondi Halle GmbH
Priority to PL07764729T priority Critical patent/PL2032454T5/en
Publication of EP2032454A1 publication Critical patent/EP2032454A1/en
Publication of EP2032454B1 publication Critical patent/EP2032454B1/en
Application granted granted Critical
Publication of EP2032454B2 publication Critical patent/EP2032454B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/25Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508Riveting; 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
    • 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
    • B65D31/10Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • 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
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/25Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508Riveting; 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
    • B65D33/2516Riveting; 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 comprising tamper-indicating means, e.g. located within the fastener
    • B65D33/2533Riveting; 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 comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
    • 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52Details
    • B65D75/58Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5805Opening 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
    • 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52Details
    • B65D75/58Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5816Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion
    • 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52Details
    • B65D75/58Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861Spouts
    • B65D75/5866Integral spouts

Definitions

  • the invention relates to a foil pouch which is formed by folding a foil, has a front surface, a back surface, an inserted first side fold and an inserted second side fold and is closed by a longitudinal sealing seam and a top seal seam, wherein a reclosable strip is attached to the inner surface of the film bag underneath the top seal, releasably connecting the first side gusset to the adjacent front and back surfaces of the bag, wherein the outer edges between the first gusset and the adjacent front or rear surface consist of folding edges, wherein the first gusset forms a resealable chute when a bag portion above the reclosing strip is torn open for filling removal along a line of weakness contained in the film, and wherein the film consists of an at least two-layer composite film having a layer of a sealable plastic on the inside of the bag and a layer of a non-sealable material on the outside of the bag.
  • a film bag with the described structure is suitable for the packaging of bulk material, such as dry food for animals, and has a reclosure, which allows the contents of the package in portions, ie pour out in portions or remove.
  • the removal takes place through an opening in the first gusset, wherein the gusset after opening the Reclosable is removable and can be used as a chute.
  • the opening is resealable.
  • the reclosure can be carried out as a so-called zipper closure, which has strip-shaped tongue and groove elements, which can be manually connected to each other by pressure and then form a snap or clip connection.
  • Other reclosures, z As Velcro closures or reclosures with a self-adhesive strip, are conceivable.
  • a foil bag with the features described above is made WO 2004/092025 A2 known. It consists of a film folded into a tube. The hose produced by folding has on-side gussets and is closed on the shell side by means of a longitudinal sealing seam. Affixed to the inner surface of the film bag is a reclosable strip which removably connects one of the gussets to the adjacent front and back surfaces of the bag. The reclosure strip is longer than the width of the gusset and is secured to the insides of the gusset as well as the adjacent bag surfaces that form the front and back surfaces of the bag. The top seal closes the upper edge of the film bag and extends as a straight seal over the entire width of the film bag.
  • a bag section is torn open along a line of weakness above the reclosure located on the inside of the bag.
  • the disadvantage is that forms an opening in the film bag after the separation of the film section, which extends from the reclosure vertically up to the upper edge of the film bag and can not be closed.
  • Another disadvantage is the unsatisfactory dimensional stability of the film bag. In use, the chute opens very far, the bag largely loses its shape on the sampling side. Due to the low dimensional stability, the handling of the opened bag is difficult. Especially with large bags requires handling of the opened bag and the metered removal of contents considerable skill of the user.
  • a gusseted bag with a reclosable withdrawal opening in a side gusset there is known a gusseted bag with a reclosable withdrawal opening in a side gusset.
  • the top seal is a straight seam and closes the top edge of the foil pouch.
  • another horizontal seam is provided, extending from the outside of the second gusset to the ends of the reclosure strip attached to the inside of the front and back surfaces. Since this seal seam is adjacent to the ends of the reclosure, the bag is relatively tight in closed reclosure even in use.
  • the gussets consist of separate, V-shaped folded film strips, which are inserted between the front surface and the rear surface of the bag and connected by longitudinal sealing seams.
  • Resealable foil pouches which are used, for example, for packaging animal dry food, in practice consist of high quality composite films comprising a readily printable polyester outer layer, a sealable polyolefin innerliner, and often a metallic one Intermediate layer with a good barrier effect with respect to oxygen and water vapor.
  • the problem is the weakening line. It is often formed in the known foil bags as a perforation, which is permeable to air.
  • the reclosure which is arranged in the interior of the film bag, likewise does not constitute a gas-tight closure, so that the contents can dry out during prolonged storage and the product properties of the contents can change.
  • a resealable foil bag with the features of the preamble of claim 1 is from the older, but not previously published WO 2007/047393 A2 known.
  • the invention has the object to improve the performance of plastic bags.
  • the film bag should be particularly easy to open and be easy to handle when removing contents.
  • the weakening line consists of an embossing line produced by heat-sealing and a laser seam of congruent design.
  • the inventive combination of a laser seam with a heat-sealed embossing line results in a line of weakness, which is characterized by a very good tear behavior.
  • the tearing is smooth and takes place with a defined propagation along the weakening line. Because of the laser ablation on the outer layer of the Composite film is limited, the weakening line remains airtight. The permeation of oxygen and water vapor through the area of the line of weakness is negligible. Where the line of weakness reaches the folding edges reinforced by longitudinal sealing seams, notches are provided in the longitudinal sealing seams for crack initiation.
  • the weakening line can extend parallel to the reclosing strip and an adjoining transverse seam, which closes the filling material space on the upper side, over the entire width of the film bag up to the edges of the second side fold. In the context of the invention, however, it is also the case that the weakening line extends parallel to the reclosing strip and then ends with a vertical section towards the top-seal seam.
  • the reclosure in the first gusset of the foil bag is exposed.
  • the gusset can be unfolded as a chute, resulting in a pouring opening, which is at least twice as long as the width of the gusset.
  • the large opening facilitates the removal of lumpy contents.
  • the provided for edge reinforcement longitudinal sealing seams give the film bag in the open state a considerable dimensional stability, so that a good handle of large plastic bags is guaranteed.
  • the longitudinal sealing seams provided for edge reinforcement can be recessed in the area of the self-locking strip. On the tightness of the film bag, this has no effect, since the outer edge of the first side fold folding edges and additionally attached longitudinal sealing seams have no sealing function.
  • the reclosure strip preferably forms a zipper closure and has a film carrier attachable to the inner surface of the bag the strip carrier molded strip-shaped closure elements.
  • the strip-shaped closure elements are manually latched together by pressure in the manner of a tongue and groove connection.
  • the film carrier is expediently connected with two sealing seams, which are arranged on both sides of the strip-shaped closure elements, with the film forming the film bag.
  • the foil pouches are manufactured as flat-laid pouches and filled with filling material later in filling systems, which is filled at the upper end of the pouch, for example, by a bottom-side opening or, before attachment of the head sealing seams.
  • the flat foil bags are stacked.
  • the reclosing elements are strongly bent at the folding or folding edges of the film bag.
  • the reclosing strip for a zipper closure has considerable elastic restoring forces, which counteract the kinking and can result in the flat-lying foil bag spreading in the area of the first gusset. With increasing stack height then there is a risk that the stacked bags slip.
  • the strip-shaped closure elements of the reclosable strip can be interrupted at the bent edges of the film bag by a punched or cut.
  • the closure strip is after being applied to a first still flat film web, at the point at which later the bending edge of the gusset is or the film web is folded, punched or cut.
  • a preferred embodiment of the invention provides that the length of the reclosure strip is greater than the width of the first gusset, with a central portion of the reclosure strip is attached to the inner surface of the gusset and wherein on both sides subsequent end portions of the reclosure strip are connected to the inside of the front surface and the rear surface of the bag.
  • the reclosable strip can be designed as a Velcro strip, as a strip with a self-adhesive surface or as a zipper closure, whose positive-locking elements can be connected to themselves.
  • the reclosing strip fastened to the inner surface of the first gusset has a length corresponding to the width of the gusset and extends to the outer edges of the bag and closure strips are secured to the inner surfaces of the front surface and the back surface. which cooperate with the reclosable strip attached to the first gusset.
  • Suitable profiles for the reclosure strips and closure strips are in DE 201 15 181 U1 described.
  • all four outer edges of the film bag are stiffened by longitudinal sealing seams.
  • the longitudinal sealing seam closing the foil bag on the shell side can be integrated into an edge which bounds the second side fold.
  • the longitudinal seam seam closing the foil bag on the shell side connects the second side fold with the front or back surface of the bag.
  • the front and back surfaces of the bag may be joined by a vertical additional seam which is disposed adjacent the first gusset and extends from a transverse seam adjacent the reclosure strip to the top seal and separates the gusset portion above the reclosure from the fill space of the bag.
  • the transverse sealing seam which closes the filling material space on the upper side, runs parallel to the top-seal seam. However, it is also within the scope of the invention to align this transverse sealing seam at an angle to the top seal seam, the distance between the transverse seal seam and the top seal at the first end adjacent the vertical auxiliary seam is smaller than at the other end in the region of the second side fold.
  • the section of the film bag which is delimited by the top seal seam and the transverse seal seam can also be used for a handle punching.
  • the film bag shown in the figures is formed by folding a film and has a front face 1, a rear face 2, an inserted first side fold 3 and an inserted second side fold 4.
  • the film bag is closed by a longitudinal sealing seam 5, a top seal seam 6 and a bottom seam seam, not shown.
  • a reclosure strip 7 is fixed, which releasably removes the first side gusset 3 with the adjacent front surface and back surface of the gusset Bag connects.
  • a bag section 8 must be torn open above the reclosing strip 7 along a weakening line 9 contained in the film. Thereafter, the first gusset 3 forms a resealable chute.
  • the longitudinal sealing seams 10 extend from a bottom seam, not shown, to the top seam 6 and are interrupted in the region of the reclosing strip 7.
  • the second gusset 4 is limited by outer edges, which are reinforced by longitudinal sealing seams.
  • the cross-sectional view in Fig. 3 one takes that the film bag closing the shell side longitudinal sealing seam 5 is moved into the outer edge of the second side fold into and connects the second side fold 4 with the front or back surface 1, 2 of the bag.
  • the longitudinal sealing seam 5 fulfills a sealing function, while the sealing seams assigned to the other outer edges only reinforce folding edges and have no sealing function.
  • the reclosure strip 7 has a film carrier 11 which can be fastened to the inner surface of the bag and strip-shaped closure elements 12 integrally formed on the film carrier.
  • the strip-shaped closure elements 12 form a zipper closure of form-fitting elements, which can be latched together manually by pressure.
  • the strip-shaped closure elements 12 may be interrupted by a punched or cut. This measure prevents a spreading of the gusset area as a result of a bending stress of the strip-shaped projections of the closure elements.
  • the length of the reclosure strip 7 is greater than the width of the first gusset 3, with a central portion of the reclosure strip secured to the inner surface of the gusset and having adjoining thereon on both sides End portions of the WiederverschlußstMails 7 are connected to the inner surfaces of the front surface 1 and the rear surface 2 of the bag.
  • the closure elements 12 of the reclosure strip 7 are formed so that they can be connected to themselves.
  • the film from which the film bag is made is an at least two-layer composite film which has a layer 14 of a sealable plastic on the inside of the bag and a layer 15 of a non-sealable material on the outside of the bag.
  • polymer for the inner layer polyolefins such as polyethylene, polypropylene, polyethylene copolymers, polypropylene copolymers and mixtures of these polymers are particularly suitable.
  • the outer layer is preferably made of a polyester, biaxially oriented polypropylene (BOPP) or an oriented polyamide (OPA). The materials mentioned can be printed on the inside or outside.
  • the composite foil may have one or more intermediate layers, e.g. B.
  • the weakening line 9 for opening the film bag consists of the combination of an embossing line 17 formed by heat sealing and a laser seam 18 introduced into the outer layer 15 of the composite film and overlaying the embossing line 17.
  • the Fig. 4 Shown is the layer structure of a composite film with a sealable inner layer 14 of polyethylene and an outer layer 15 of polyethylene terephthalate (PET), which is printed on its inner surface and bonded to an intermediate layer 16 of PET ,
  • the intermediate layer 16 is provided with an about 100 nanometers thick metallization 16 'and bonded to the PE layer 14.
  • the deformation of the composite film by to recognize the linear embossing by heat sealing.
  • the PET layers 15, 16 are severed by the combination of heat sealing and laser irradiation except for the metallic coating forming an intermediate layer 16 '.
  • the described weakening line is characterized by a good tear-open behavior and is gas-impermeable.
  • Fig. 1 extends the weakening line 9 parallel to the reclosure strip 7 and an adjoining transverse seam 19, which closes the Gregutraum on the upper side, over the entire width of the film bag to the edges of the second side fold 4.
  • notches 20 are provided in the longitudinal sealing seams 10 for crack initiation.
  • the weakening line 9 extends parallel to the reclosing strip 7 and then exits with a vertical portion to the head seam 6.
  • the front surface and the rear surface of the film bag are connected by a vertical sealing seam 21 which abuts the ends of the reclosing strip and extends to the top seal 6.
  • the front face 1 and the back face 2 of the bag are connected by a vertical additional sealing seam 22 which is arranged next to the first gusset 3, extends from a transverse seam 19 adjoining the reclosing strip 7 to the top seal 6 and the gusset region above the reclosure of the filling material space of the bag separates.
  • the transverse sealing seam 19 extends obliquely to the top seal seam 6, wherein the distance between the transverse seal seam and the top seal seam At the first end, which is adjacent to the vertical additional sealing seam 22, smaller than at the other end in the region of the second side fold 4.
  • the section of the foil bag which is delimited by the top seal seam 6 and the transverse seal seam 19 contains a handle punching 23.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)

Description

Die Erfindung betrifft einen Folienbeutel, der durch Falten einer Folie geformt ist, eine Frontfläche, eine Rückfläche, eine eingelegte erste Seitenfalte sowie eine eingelegte zweite Seitenfalte aufweist und durch eine Längssiegelnaht sowie eine Kopfsiegelnaht verschlossen ist,
wobei an der Innenfläche des Folienbeutels unterhalb der Kopfsiegelnaht ein Wiederverschlussstreifen befestigt ist, der die erste Seitenfalte lösbar mit der benachbarten Frontfläche und Rückfläche des Beutels verbindet,
wobei die Außenkanten zwischen der ersten Seitenfalte und der angrenzenden Front- bzw. Rückfläche aus Faltkanten bestehen,
wobei die erste Seitenfalte eine wiederverschließbare Schütte bildet, wenn ein Beutelabschnitt oberhalb des Wiederverschlussstreifens zur Füllgutentnahme entlang einer in der Folie enthaltenen Schwächungslinie aufgerissen wird, und
wobei die Folie aus einer zumindest zweischichtigen Verbundfolie besteht, die an der Beutelinnenseite eine Schicht aus einem siegelfähigen Kunststoff und an der Beutelaußenseite eine Schicht aus einem nichtsiegelfähigen Material aufweist.
The invention relates to a foil pouch which is formed by folding a foil, has a front surface, a back surface, an inserted first side fold and an inserted second side fold and is closed by a longitudinal sealing seam and a top seal seam,
wherein a reclosable strip is attached to the inner surface of the film bag underneath the top seal, releasably connecting the first side gusset to the adjacent front and back surfaces of the bag,
wherein the outer edges between the first gusset and the adjacent front or rear surface consist of folding edges,
wherein the first gusset forms a resealable chute when a bag portion above the reclosing strip is torn open for filling removal along a line of weakness contained in the film, and
wherein the film consists of an at least two-layer composite film having a layer of a sealable plastic on the inside of the bag and a layer of a non-sealable material on the outside of the bag.

Ein Folienbeutel mit dem beschriebenen Aufbau eignet sich zur Verpackung von Schüttgut, beispielsweise Trockenfutter für Tiere, und weist einen Wiederverschluss auf, der es erlaubt, den Inhalt der Verpackung in Teilmengen, also portionsweise auszuschütten bzw. zu entnehmen. Die Entnahme erfolgt durch eine Öffnung in der ersten Seitenfalte, wobei die Seitenfalte nach Öffnen des Wiederverschlusses herausziehbar ist und als Schütte genutzt werden kann. Die Öffnung ist wiederverschließbar. Der Wiederverschluss kann als so genannter Zipperverschluss ausgeführt werden, der leistenförmige Nut- und Federelemente aufweist, die manuell durch Druck miteinander verbunden werden können und dann eine Rast- bzw. Clipsverbindung bilden. Auch andere Wiederverschlüsse, z. B. Klettverschlüsse oder Wiederverschlüsse mit einem selbstklebenden Streifen, sind denkbar.A film bag with the described structure is suitable for the packaging of bulk material, such as dry food for animals, and has a reclosure, which allows the contents of the package in portions, ie pour out in portions or remove. The removal takes place through an opening in the first gusset, wherein the gusset after opening the Reclosable is removable and can be used as a chute. The opening is resealable. The reclosure can be carried out as a so-called zipper closure, which has strip-shaped tongue and groove elements, which can be manually connected to each other by pressure and then form a snap or clip connection. Other reclosures, z. As Velcro closures or reclosures with a self-adhesive strip, are conceivable.

Ein Folienbeutel mit den eingangs beschriebenen Merkmalen ist aus WO 2004/092025 A2 bekannt. Er besteht aus einer zu einem Schlauch gefalteten Folie. Der durch Falten erzeugte Schlauch weist einliegende Seitenfalten auf und ist mantelseitig mittels einer Längssiegelnaht verschlossen. An der Innenfläche des Folienbeutels ist ein Wiederverschlussstreifen befestigt, der eine der Seitenfalten lösbar mit der benachbarten Front- und Rückfläche des Beutels verbindet. Der Wiederverschlussstreifen ist länger als die Breite der Seitenfalte und ist an den Innenseiten der Seitenfalte sowie den angrenzenden Beutelflächen, welche die Front- und Rückfläche des Beutels bilden, befestigt. Die Kopfsiegelnaht verschließt den oberen Rand des Folienbeutels und erstreckt sich als gerade Siegelnaht über die gesamte Breite des Folienbeutels. Zum erstmaligen Gebrauch wird ein Beutelabschnitt oberhalb des an der Beutelinnenseite angeordneten Wiederverschlusses entlang einer Schwächungslinie aufgerissen. Nachteilig ist, dass sich nach dem Abtrennen des Folienabschnittes eine Öffnung im Folienbeutel bildet, die sich von dem Wiederverschluss vertikal bis zum oberen Rand des Folienbeutels erstreckt und nicht verschlossen werden kann. Ein weiterer Nachteil ist die unbefriedigende Formstabilität des Folienbeutels. Beim Gebrauch öffnet sich die Schütte sehr weit, wobei der Beutel auf der Entnahmeseite weitgehend seine Form verliert. Aufgrund der geringen Formstabilität ist die Handhabung des geöffneten Beutels schwierig. Insbesondere bei großen Beuteln erfordert die Handhabung des geöffneten Beutels und die dosierte Entnahme von Füllgut erhebliches Geschick des Benutzers.A foil bag with the features described above is made WO 2004/092025 A2 known. It consists of a film folded into a tube. The hose produced by folding has on-side gussets and is closed on the shell side by means of a longitudinal sealing seam. Affixed to the inner surface of the film bag is a reclosable strip which removably connects one of the gussets to the adjacent front and back surfaces of the bag. The reclosure strip is longer than the width of the gusset and is secured to the insides of the gusset as well as the adjacent bag surfaces that form the front and back surfaces of the bag. The top seal closes the upper edge of the film bag and extends as a straight seal over the entire width of the film bag. For initial use, a bag section is torn open along a line of weakness above the reclosure located on the inside of the bag. The disadvantage is that forms an opening in the film bag after the separation of the film section, which extends from the reclosure vertically up to the upper edge of the film bag and can not be closed. Another disadvantage is the unsatisfactory dimensional stability of the film bag. In use, the chute opens very far, the bag largely loses its shape on the sampling side. Due to the low dimensional stability, the handling of the opened bag is difficult. Especially with large bags requires handling of the opened bag and the metered removal of contents considerable skill of the user.

Aus DE 201 15 181 U1 ist ebenfalls ein Seitenfaltenbeutel mit einer wiederverschließbaren Entnahmenöffnung in einer Seitenfalte bekannt. Die Kopfsiegelnaht ist eine gerade Naht und verschließt den oberen Rand des Folienbeutels. Parallel zu ihr ist eine weitere horizontale Naht vorgesehen, die sich von der Außenseite der zweiten Seitenfalte bis zu den an der Innenseite der Front- und Rückfläche befestigten Enden des Wiederverschlussstreifens erstreckt. Da diese Siegelnaht an die Enden des Wiederverschlusses angrenzt, ist der Beutel bei geschlossenem Wiederverschluss auch im Gebrauch verhältnismäßig dicht. Die Seitenfalten bestehen aus separaten, V-förmig gefalteten Folienstreifen, die zwischen Frontfläche und Rückfläche des Beutels eingelegt und durch Längssiegelnähte mit diesen verbunden sind. Zur Abdichtung des Folienbeutels sind breite Nähte notwendig, die formsteife Außenkanten des Beutels bilden und dem Folienbeutel eine gute Formstabilität verleihen. Nachteilig ist, dass die Siegelnähte die Öffnungsbreite des Wiederverschlusses erheblich einschränken, was die Entnahme insbesondere von größerem stückigen Füllgut erschwert. Auch sind die Siegelnähte zwischen den Seitenfalten und der Front- bzw. Rückfläche nicht immer gasdicht.Out DE 201 15 181 U1 Also, there is known a gusseted bag with a reclosable withdrawal opening in a side gusset. The top seal is a straight seam and closes the top edge of the foil pouch. Parallel to it, another horizontal seam is provided, extending from the outside of the second gusset to the ends of the reclosure strip attached to the inside of the front and back surfaces. Since this seal seam is adjacent to the ends of the reclosure, the bag is relatively tight in closed reclosure even in use. The gussets consist of separate, V-shaped folded film strips, which are inserted between the front surface and the rear surface of the bag and connected by longitudinal sealing seams. To seal the film bag wide seams are necessary that form dimensionally stable outer edges of the bag and give the film bag good dimensional stability. The disadvantage is that the sealed seams considerably restrict the opening width of the reclosure, which makes it difficult to remove, in particular, larger, lumpy contents. Also, the seal seams between the gussets and the front and rear surfaces are not always gas-tight.

Ein ähnlicher Folienbeutel wie die zuvor beschriebenen Ausführungen mit einer wiederverschließbaren Entnahmeöffnung in der Seitenfalte ist aus WO 02/079049 A1 bekannt.A similar film bag as the previously described embodiments with a reclosable removal opening in the gusseted is made WO 02/079049 A1 known.

Wiederverschließbare Folienbeutel, die beispielsweise zur Verpackung von Trockenfutter für Tiere verwendet werden, bestehen in der Praxis aus hochwertigen Verbundfolien, die eine gut bedruckbare Außenschicht aus Polyester, eine siegelbare Innenschicht aus einem Polyolefin und häufig eine metallische Zwischenschicht mit einer guten Barrierewirkung in Bezug auf Sauerstoff und Wasserdampf aufweisen. Problematisch ist die Schwächungslinie. Sie ist bei den bekannten Folienbeuteln häufig als Perforation ausgebildet, welche luftdurchlässig ist. Der im Innern des Folienbeutels angeordnete Wiederverschluss stellt ebenfalls keinen gasdichten Verschluss dar, so dass das Füllgut bei einer längeren Lagerung austrocknen kann und sich die Produkteigenschaften des Füllgutes verändern können.Resealable foil pouches, which are used, for example, for packaging animal dry food, in practice consist of high quality composite films comprising a readily printable polyester outer layer, a sealable polyolefin innerliner, and often a metallic one Intermediate layer with a good barrier effect with respect to oxygen and water vapor. The problem is the weakening line. It is often formed in the known foil bags as a perforation, which is permeable to air. The reclosure, which is arranged in the interior of the film bag, likewise does not constitute a gas-tight closure, so that the contents can dry out during prolonged storage and the product properties of the contents can change.

Ein wiederverschließbarer Folienbeutel mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 ist aus der älteren, jedoch nicht vorveröffentlichten WO 2007/047393 A2 bekannt.A resealable foil bag with the features of the preamble of claim 1 is from the older, but not previously published WO 2007/047393 A2 known.

Vor dem erläuterten technologischen Hintergrund liegt der Erfindung die Aufgabe zugrunde, die Gebrauchseigenschaften von Folienbeuteln zu verbessern. Der Folienbeutel soll sich insbesondere leicht öffnen lassen und bei der Entnahme von Füllgut gut handhabbar sein.Before the explained technological background, the invention has the object to improve the performance of plastic bags. The film bag should be particularly easy to open and be easy to handle when removing contents.

Die Aufgabe wird erfindungsgemäß durch einen Folienbeutel mit den Merkmalen des Anspruches 1 gelöst.The object is achieved by a film bag with the features of claim 1.

Die Schwächungslinie besteht aus einer durch Heißsiegeln erzeugten Prägelinie und einer deckungsgleich ausgeführten Lasernaht. Durch das Heißsiegeln wird die Folie unter der Einwirkung von Druck und Temperatur verformt, und im Laserverfahren erfolgt im Bereich der Prägelinie ein partieller Materialabtrag an der Außenseite der Verbundfolie. Die erfindungsgemäße Kombination einer Lasernaht mit einer heißgesiegelten Prägelinie ergibt eine Schwächungslinie, die sich durch ein sehr gutes Aufreißverhalten auszeichnet. Das Aufreißen ist leichtgängig und erfolgt mit einer definierten Ausbreitung entlang der Schwächungslinie. Dadurch, dass der Laserabtrag auf die Außenschicht der Verbundfolie beschränkt ist, bleibt die Schwächungslinie luftdicht. Die Permeation von Sauerstoff und Wasserdampf durch den Bereich der Schwächungslinie ist vernachlässigbar. Dort, wo die Schwächungslinie die durch Längssiegelnähte verstärkten Faltkanten erreicht, sind Kerben in den Längssiegelnähten zur Rissinitiierung vorgesehen.The weakening line consists of an embossing line produced by heat-sealing and a laser seam of congruent design. By heat sealing, the film is deformed under the action of pressure and temperature, and in the laser process takes place in the region of the embossing line, a partial removal of material on the outside of the composite film. The inventive combination of a laser seam with a heat-sealed embossing line results in a line of weakness, which is characterized by a very good tear behavior. The tearing is smooth and takes place with a defined propagation along the weakening line. Because of the laser ablation on the outer layer of the Composite film is limited, the weakening line remains airtight. The permeation of oxygen and water vapor through the area of the line of weakness is negligible. Where the line of weakness reaches the folding edges reinforced by longitudinal sealing seams, notches are provided in the longitudinal sealing seams for crack initiation.

Die Schwächungslinie kann sich parallel zu dem Wiederverschlussstreifen und einer daran anschließenden Quersiegelnaht, welche den Füllgutraum oberseitig schließt, über die gesamte Breite des Folienbeutels bis zu den Rändern der zweiten Seitenfalte erstrecken. Im Rahmen der Erfindung liegt es aber auch, dass die Schwächungslinie sich parallel zu dem Wiederverschlussstreifen erstreckt und dann mit einem vertikalen Abschnitt zur Kopfsiegelnaht ausläuft.The weakening line can extend parallel to the reclosing strip and an adjoining transverse seam, which closes the filling material space on the upper side, over the entire width of the film bag up to the edges of the second side fold. In the context of the invention, however, it is also the case that the weakening line extends parallel to the reclosing strip and then ends with a vertical section towards the top-seal seam.

Durch das Aufreißen eines Beutelabschnittes entlang der Schwächungslinie wird der Wiederverschluss in der ersten Seitenfalte des Folienbeutels freigelegt. Nach Freilegen des Wiederverschlusses kann die Seitenfalte als Schütte ausgeklappt werden, wobei sich eine Schüttöffnung ergibt, die zumindest doppelt so lang ist wie die Breite der Seitenfalte. Die große Öffnung erleichtert die Entnahme von stückigem Füllgut. Die zur Kantenversteifung vorgesehenen Längssiegelnähte verleihen dem Folienbeutel auch in geöffnetem Zustand eine beachtliche Formstabilität, so dass auch eine gute Handhabe von großen Folienbeuteln gewährleistet ist. Die zur Kantenversteifung vorgesehenen Längssiegelnähte können im Bereich des Wederverschlussstreifens ausgespart werden. Auf die Dichtigkeit des Folienbeutels hat dies keinen Einfluss, da die Außenkante der ersten Seitenfalte Faltkanten sind und die zusätzlich angebrachten Längssiegelnähte keine Dichtungsfunktion besitzen.By tearing a bag section along the line of weakness, the reclosure in the first gusset of the foil bag is exposed. After exposing the reclosure, the gusset can be unfolded as a chute, resulting in a pouring opening, which is at least twice as long as the width of the gusset. The large opening facilitates the removal of lumpy contents. The provided for edge reinforcement longitudinal sealing seams give the film bag in the open state a considerable dimensional stability, so that a good handle of large plastic bags is guaranteed. The longitudinal sealing seams provided for edge reinforcement can be recessed in the area of the self-locking strip. On the tightness of the film bag, this has no effect, since the outer edge of the first side fold folding edges and additionally attached longitudinal sealing seams have no sealing function.

Der Wiederverschlussstreifen bildet vorzugsweise einen Zipperverschluss und weist einen an der Innenfläche des Beutels befestigbaren Folienträger und an den Folienträger angeformte leistenförmige Verschlusselemente auf. Die leistenförmigen Verschlusselemente sind nach Art einer Nut- und Federverbindung durch Druck manuell miteinander verrastbar. Der Folienträger ist zweckmäßig mit zwei Siegelnähten, die beidseits der leistenförmigen Verschlusselemente angeordnet sind, mit der den Folienbeutel bildenden Folie verbunden.The reclosure strip preferably forms a zipper closure and has a film carrier attachable to the inner surface of the bag the strip carrier molded strip-shaped closure elements. The strip-shaped closure elements are manually latched together by pressure in the manner of a tongue and groove connection. The film carrier is expediently connected with two sealing seams, which are arranged on both sides of the strip-shaped closure elements, with the film forming the film bag.

Die Folienbeutel werden als flachgelegte Beutel gefertigt und erst später in Abfüllanlagen mit Füllgut befüllt, welches beispielsweise durch eine bodenseitige Öffnung oder - vor Anbringung der Kopfsiegelnähte - am oberen Ende des Beutels eingefüllt wird. Für den Transport werden die flach liegenden Folienbeutel gestapelt. Dabei werden die Wiederverschlusselemente an Falt- bzw. Knickkanten des Folienbeutels stark gebogen. Der Wiederverschlussstreifen für einen Zipperverschluss besitzt erhebliche elastische Rückstellkräfte, die dem Knicken entgegenwirken und zur Folge haben können, dass die flachliegenden Folienbeutel im Bereich der ersten Seitenfalte aufspreizen. Bei zunehmender Stapelhöhe besteht dann die Gefahr, dass die aufeinander gestapelten Beutel verrutschen. Um dies zu vermeiden, können die leistenförmigen Verschlusselemente des Wiederverschlussstreifens an Knickkanten des Folienbeutels durch eine Ausstanzung oder einen Schnitt unterbrochen werden. Bei der Fertigung des Folienbeutels wird der Verschlussstreifen nach dem Aufbringen auf eine zunächst noch ebene Folienbahn, an der Stelle, an der später die Knickkante der Seitenfalte ist bzw. die Folienbahn gefaltet wird, eingestanzt oder eingeschnitten.The foil pouches are manufactured as flat-laid pouches and filled with filling material later in filling systems, which is filled at the upper end of the pouch, for example, by a bottom-side opening or, before attachment of the head sealing seams. For transport, the flat foil bags are stacked. The reclosing elements are strongly bent at the folding or folding edges of the film bag. The reclosing strip for a zipper closure has considerable elastic restoring forces, which counteract the kinking and can result in the flat-lying foil bag spreading in the area of the first gusset. With increasing stack height then there is a risk that the stacked bags slip. To avoid this, the strip-shaped closure elements of the reclosable strip can be interrupted at the bent edges of the film bag by a punched or cut. In the manufacture of the film bag, the closure strip is after being applied to a first still flat film web, at the point at which later the bending edge of the gusset is or the film web is folded, punched or cut.

Hinsichtlich des Anbringens des Wiederverschlussstreifens ergeben sich mehrere Möglichkeiten. Eine bevorzugte Ausführung der Erfindung sieht vor, dass die Länge des Wiederverschlussstreifens größer ist als die Breite der ersten Seitenfalte, wobei ein mittlerer Abschnitt des Wiederverschlussstreifens an der Innenfläche der Seitenfalte befestigt ist und wobei daran beidseitig anschließende Endabschnitte des Wiederverschlussstreifens mit der Innenseite der Frontfläche bzw. der Rückfläche des Beutels verbunden sind. Der Wiederverschlussstreifen kann als Klettstreifen, als Streifen mit einer selbstklebenden Oberfläche oder als Zipperverschluss, dessen Formschlusselemente mit sich selbst verbindbar sind, ausgebildet sein. Im Rahmen der Erfindung liegt es aber auch, dass der an der Innenfläche der ersten Seitenfalte befestigte Wiederverschlussstreifen eine der Breite der Seitenfalte entsprechende Länge aufweist und sich bis zu den Außenkanten des Beutels erstreckt und dass an den Innenseiten der Frontfläche und der Rückfläche Verschlussstreifen befestigt sind, die mit dem an der ersten Seitenfalte angebrachten Wiederverschlussstreifen zusammenwirken. Geeignete Profile für die Wiederverschlussstreifen und Verschlussstreifen sind in DE 201 15 181 U1 beschrieben.With regard to the attachment of the reclosable strip, there are several possibilities. A preferred embodiment of the invention provides that the length of the reclosure strip is greater than the width of the first gusset, with a central portion of the reclosure strip is attached to the inner surface of the gusset and wherein on both sides subsequent end portions of the reclosure strip are connected to the inside of the front surface and the rear surface of the bag. The reclosable strip can be designed as a Velcro strip, as a strip with a self-adhesive surface or as a zipper closure, whose positive-locking elements can be connected to themselves. However, it is also within the scope of the invention that the reclosing strip fastened to the inner surface of the first gusset has a length corresponding to the width of the gusset and extends to the outer edges of the bag and closure strips are secured to the inner surfaces of the front surface and the back surface. which cooperate with the reclosable strip attached to the first gusset. Suitable profiles for the reclosure strips and closure strips are in DE 201 15 181 U1 described.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung sind alle vier Außenkanten des Folienbeutels durch Längssiegelnähte versteift. Die den Folienbeutel mantelseitig schließende Längssiegelnaht kann in eine Kante, welche die zweite Seitenfalte begrenzt, integriert werden. Bei dieser Ausführung verbindet die den Folienbeutel mantelseitig schließende Längssiegelnaht die zweite Seitenfalte mit der Front- oder Rückfläche des Beutels.According to an advantageous embodiment of the invention, all four outer edges of the film bag are stiffened by longitudinal sealing seams. The longitudinal sealing seam closing the foil bag on the shell side can be integrated into an edge which bounds the second side fold. In this embodiment, the longitudinal seam seam closing the foil bag on the shell side connects the second side fold with the front or back surface of the bag.

Die Front- und Rückflächen des Beutels können durch eine vertikale Zusatznaht verbunden werden, die neben der ersten Seitenfalte angeordnet ist und sich von einer an den Wiederverschlussstreifen anschließenden Quersiegelnaht bis zur Kopfsiegelnaht erstreckt und den Seitenfaltenbereich oberhalb des Wiederverschlusses von dem Füllgutraum des Beutels trennt. Die Quersiegelnaht, die den Füllgutraum oberseitig schließt, verläuft parallel zur Kopfsiegelnaht. Im Rahmen der Erfindung liegt es aber auch, diese Quersiegelnaht schräg zur Kopfsiegelnaht auszurichten, wobei der Abstand zwischen der Quersiegelnaht und der Kopfsiegelnaht am ersten Ende, das an die vertikale Zusatzsiegelnaht angrenzt, kleiner ist als an dem anderen Ende im Bereich der zweiten Seitenfalte. Der von der Kopfsiegelnaht und der Quersiegelnaht begrenzte Abschnitt des Folienbeutels kann ferner für eine Handgriffausstanzung genutzt werden.The front and back surfaces of the bag may be joined by a vertical additional seam which is disposed adjacent the first gusset and extends from a transverse seam adjacent the reclosure strip to the top seal and separates the gusset portion above the reclosure from the fill space of the bag. The transverse sealing seam, which closes the filling material space on the upper side, runs parallel to the top-seal seam. However, it is also within the scope of the invention to align this transverse sealing seam at an angle to the top seal seam, the distance between the transverse seal seam and the top seal at the first end adjacent the vertical auxiliary seam is smaller than at the other end in the region of the second side fold. The section of the film bag which is delimited by the top seal seam and the transverse seal seam can also be used for a handle punching.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen schematisch:

Fig. 1
die Seitenansicht eines noch original verschlossenen Folienbeutels,
Fig. 2
den in Fig. 1 dargestellten Beutel in geöffnetem Zustand in einer perspektivischen Darstellung,
Fig. 3
einen Schnitt durch den geöffneten Folienbeutel in der Schnittebene A-A aus Fig. 1,
Fig. 4
eine Schnittdarstellung durch die Verbundfolie im Bereich der Schwächungslinie in einer stark vergrößerten Darstellung und
Fig. 5 und 6
weitere Ausgestaltungen eines noch original verschlossenen Folienbeutels jeweils in der Seitenansicht.
In the following the invention will be explained with reference to a drawing showing only one embodiment. They show schematically:
Fig. 1
the side view of a still sealed original foil bag,
Fig. 2
the in Fig. 1 illustrated bag in the open state in a perspective view,
Fig. 3
a section through the opened foil bag in the sectional plane AA Fig. 1 .
Fig. 4
a sectional view through the composite film in the region of the weakening line in a greatly enlarged view and
FIGS. 5 and 6
further embodiments of a still sealed original foil bag in each case in the side view.

Der in den Figuren dargestellte Folienbeutel ist durch Falten einer Folie geformt und weist eine Frontfläche 1, eine Rückfläche 2, eine eingelegte ersten Seitenfalte 3 sowie eine eingelegte zweite Seitenfalte 4 auf. Der Folienbeutel ist durch eine Längssiegelnaht 5, eine Kopfsiegelnaht 6 und eine nicht dargestellte Bodensiegelnaht verschlossen. An der Innenfläche des Folienbeutels unterhalb der Kopfsiegelnaht 6 ist ein Wiederverschlussstreifen 7 befestigt, der die erste Seitenfalte 3 lösbar mit der benachbarten Frontfläche und Rückfläche des Beutels verbindet. Zur Füllgutentnahme muss ein Beutelabschnitt 8 oberhalb des Wiederverschlussstreifens 7 entlang einer in der Folie enthaltenen Schwächungslinie 9 aufgerissen werden. Danach bildet die erste Seitenfalte 3 eine wiederverschließbare Schütte. Aus einer vergleichenden Betrachtung derFig. 1 bis 3 wird deutlich, dass die Faltkanten zwischen der ersten Seitenfalte 3 und der angrenzenden Front- bzw. Rückfläche 1, 2 durch Längssiegelnähte 10 versteift sind. Die Längssiegelnähte 10 erstrecken sich von einer nicht dargestellten Bodensiegelnaht bis zur Kopfsiegelnaht 6 und sind im Bereich des Wiederverschlussstreifens 7 unterbrochen. Auch die zweite Seitenfalte 4 ist von Außenkanten begrenzt, die durch Längssiegelnähte verstärkt sind. Der Querschnittsdarstellung in Fig. 3 entnimmt man, dass die den Folienbeutel mantelseitig schließende Längssiegelnaht 5 in die Außenkante der zweiten Seitenfalte hinein verlegt ist und die zweite Seitenfalte 4 mit der Front- oder Rückfläche 1, 2 des Beutels verbindet. Die Längssiegelnaht 5 erfüllt eine Dichtungsfunktion, während die den anderen Außenkanten zugeordneten Siegelnähte Faltkanten lediglich verstärken und keine Dichtungsfunktion haben.The film bag shown in the figures is formed by folding a film and has a front face 1, a rear face 2, an inserted first side fold 3 and an inserted second side fold 4. The film bag is closed by a longitudinal sealing seam 5, a top seal seam 6 and a bottom seam seam, not shown. On the inner surface of the film bag below the top seal 6, a reclosure strip 7 is fixed, which releasably removes the first side gusset 3 with the adjacent front surface and back surface of the gusset Bag connects. To remove the filling material, a bag section 8 must be torn open above the reclosing strip 7 along a weakening line 9 contained in the film. Thereafter, the first gusset 3 forms a resealable chute. From a comparative analysis of the FIG. 1 to 3 it is clear that the folded edges between the first gusset 3 and the adjacent front or rear surface 1, 2 are stiffened by longitudinal sealing seams 10. The longitudinal sealing seams 10 extend from a bottom seam, not shown, to the top seam 6 and are interrupted in the region of the reclosing strip 7. The second gusset 4 is limited by outer edges, which are reinforced by longitudinal sealing seams. The cross-sectional view in Fig. 3 one takes that the film bag closing the shell side longitudinal sealing seam 5 is moved into the outer edge of the second side fold into and connects the second side fold 4 with the front or back surface 1, 2 of the bag. The longitudinal sealing seam 5 fulfills a sealing function, while the sealing seams assigned to the other outer edges only reinforce folding edges and have no sealing function.

Der Wiederverschlussstreifen 7 weist einen an der Innenfläche des Beutels befestigbaren Folienträger 11 und an den Folienträger angeformte leistenförmige Verschlusselemente 12 auf. Die leistenförmigen Verschlusselemente 12 bilden einen Zipperverschluss aus Formschlusselementen, die manuell durch Druck miteinander verrastbar sind. An der Knickkante 13 der eingelegten Seitenfalte 3 können die leistenförmigen Verschlusselemente 12 durch eine Ausstanzung oder einen Schnitt unterbrochen sein. Diese Maßnahme verhindert ein Aufspreizen des Seitenfaltenbereiches in Folge einer Biegebeanspruchung der leistenförmigen Vorsprünge der Verschlusselemente. Die Länge des Wiederverschlussstreifens 7 ist größer als die Breite der ersten Seitenfalte 3, wobei ein mittlerer Abschnitt des Wiederverschlussstreifens an der Innenfläche der Seitenfalte befestigt ist und wobei daran beidseitig anschließende Endabschnitte des Wiederverschlussstreifens 7 mit den Innenflächen der Frontfläche 1 bzw. der Rückfläche 2 des Beutels verbunden sind. Die Verschlusselemente 12 des Wiederverschlussstreifens 7 sind so ausgebildet, dass sie mit sich selbst verbindbar sind.The reclosure strip 7 has a film carrier 11 which can be fastened to the inner surface of the bag and strip-shaped closure elements 12 integrally formed on the film carrier. The strip-shaped closure elements 12 form a zipper closure of form-fitting elements, which can be latched together manually by pressure. At the bending edge 13 of the inserted gusset 3, the strip-shaped closure elements 12 may be interrupted by a punched or cut. This measure prevents a spreading of the gusset area as a result of a bending stress of the strip-shaped projections of the closure elements. The length of the reclosure strip 7 is greater than the width of the first gusset 3, with a central portion of the reclosure strip secured to the inner surface of the gusset and having adjoining thereon on both sides End portions of the Wiederverschlußstreifens 7 are connected to the inner surfaces of the front surface 1 and the rear surface 2 of the bag. The closure elements 12 of the reclosure strip 7 are formed so that they can be connected to themselves.

Die Folie, aus der der Folienbeutel gefertigt ist, ist eine zumindest zweischichtige Verbundfolie, die an der Beutelinnenseite eine Schicht 14 aus einem siegelfähigen Kunststoff und an der Beutelaußenseite eine Schicht 15 aus einem nichtsiegelfähigen Material aufweist. Als Polymer für die Innenschichtsind insbesondere Polyolefine wie beispielsweise Polyethylen, Polypropylen, Polyethylen-Copolymere, Polypropylen-Copolymere sowie Mischungen dieser Polymere geeignet. Die Außenschicht besteht vorzugsweise aus einem Polyester, biaxial orientiertem Polypropylen (BOPP) oder einem orientierten Polyamid (OPA). Die genannten Materialien sind innenseitig oder außenseitig bedruckbar. Die Verbundfolie kann eine oder mehrere Zwischenschichten aufweisen, z. B. eine dünne Metallschicht zur Verbesserung der Barrierewirkung in Bezug auf die Sauerstoffdurchlässigkeit und die Wasserdampfdurchlässigkeit. Die Schwächungslinie 9 zum Öffnen des Folienbeutels besteht aus der Kombination einer durch Heißsiegeln gebildeten Prägelinie 17 und einer in die Außenschicht 15 der Verbundfolie eingebrachten und die Prägelinie 17 überlagernden Lasernaht 18.The film from which the film bag is made is an at least two-layer composite film which has a layer 14 of a sealable plastic on the inside of the bag and a layer 15 of a non-sealable material on the outside of the bag. As the polymer for the inner layer, polyolefins such as polyethylene, polypropylene, polyethylene copolymers, polypropylene copolymers and mixtures of these polymers are particularly suitable. The outer layer is preferably made of a polyester, biaxially oriented polypropylene (BOPP) or an oriented polyamide (OPA). The materials mentioned can be printed on the inside or outside. The composite foil may have one or more intermediate layers, e.g. B. a thin metal layer to improve the barrier effect in terms of oxygen permeability and water vapor permeability. The weakening line 9 for opening the film bag consists of the combination of an embossing line 17 formed by heat sealing and a laser seam 18 introduced into the outer layer 15 of the composite film and overlaying the embossing line 17.

Die Fig. 4 zeigt in einem stark vergrößerten Maßstab einen Querschnitt durch die Schwächungslinie 9. Dargestellt ist der Schichtenaufbau einer Verbundfolie mit einer siegelbaren Innenschicht 14 aus Polyethylen und einer Außenschicht 15 aus Polyethylenterephthalat (PET), die an ihrer Innenfläche bedruckt und mit einer Zwischenschicht 16 aus PET verklebt ist. Die Zwischenschicht 16 ist mit einer etwa 100 Nanometer starken Metallisierung 16' versehen und mit der PE-Schicht 14 verklebt. Im Querschnitt ist die Verformung der Verbundfolie durch die linienförmige Prägung durch Heißsiegeln zu erkennen. In der Mitte der Verformung sind die PET-Schichten 15,16 durch die Kombination von Heißsiegeln und Bestrahlung durch einen Laser bis auf die metallische Beschichtung, die eine Zwischenschicht 16' bildet, durchtrennt. Die beschriebene Schwächungslinie zeichnet sich durch ein gutes Aufreißverhalten auf und ist gasundurchlässig.The Fig. 4 Shown is the layer structure of a composite film with a sealable inner layer 14 of polyethylene and an outer layer 15 of polyethylene terephthalate (PET), which is printed on its inner surface and bonded to an intermediate layer 16 of PET , The intermediate layer 16 is provided with an about 100 nanometers thick metallization 16 'and bonded to the PE layer 14. In cross section, the deformation of the composite film by to recognize the linear embossing by heat sealing. In the middle of the deformation, the PET layers 15, 16 are severed by the combination of heat sealing and laser irradiation except for the metallic coating forming an intermediate layer 16 '. The described weakening line is characterized by a good tear-open behavior and is gas-impermeable.

Im Ausführungsbeispiel der Fig. 1 erstreckt sich die Schwächungslinie 9 parallel zu dem Wiederverschlussstreifen 7 und einer daran anschließenden Quersiegelnaht 19, welche den Füllgutraum oberseitig schließt, über die gesamte Breite des Folienbeutels bis zu den Rändern der zweiten Seitenfalte 4. Dort, wo die Schwächungslinie 9 die durch Längssiegelnähte 10 verstärkte Faltkanten erreicht, sind Kerben 20 in den Längssiegelnähten 10 zur Rissinitiierung vorgesehen.In the embodiment of Fig. 1 extends the weakening line 9 parallel to the reclosure strip 7 and an adjoining transverse seam 19, which closes the Füllgutraum on the upper side, over the entire width of the film bag to the edges of the second side fold 4. There, where the line of weakness 9 by the longitudinal sealing seams 10 reinforced folding edges are reached, notches 20 are provided in the longitudinal sealing seams 10 for crack initiation.

Im Ausführungsbeispiel der Fig. 5 erstreckt sich die Schwächungslinie 9 parallel zu dem Wiederverschlussstreifen 7 und läuft dann mit einem vertikalen Abschnitt zur Kopfsiegelnaht 6 aus. Die Frontfläche und die Rückfläche des Folienbeutels sind durch eine vertikale Siegelnaht 21 verbunden, die an die Enden des Wiederverschlussstreifens angrenzt und sich bis zur Kopfsiegelnaht 6 erstreckt.In the embodiment of Fig. 5 the weakening line 9 extends parallel to the reclosing strip 7 and then exits with a vertical portion to the head seam 6. The front surface and the rear surface of the film bag are connected by a vertical sealing seam 21 which abuts the ends of the reclosing strip and extends to the top seal 6.

Im Ausführungsbeispiel der Fig. 6 sind die Frontfläche 1 und die Rückfläche 2 des Beutels durch eine vertikale Zusatzsiegelnaht 22 verbunden, die neben der ersten Seitenfalte 3 angeordnet ist, sich von einer an den Wiederverschlussstreifen 7 anschließenden Quersiegelnaht 19 bis zur Kopfsiegelnaht 6 erstreckt und den Seitenfaltenbereich oberhalb des Wiederverschlusses von dem Füllgutraum des Beutels trennt. Die Quersiegelnaht 19 verläuft schräg zur Kopfsiegelnaht 6, wobei der Abstand zwischen der Quersiegelnaht und der Kopfsiegelnaht am ersten Ende, das an die vertikale Zusatzsiegelnaht 22 angrenzt, kleiner ist als an dem anderen Ende im Bereich der zweiten Seitenfalte 4. Der von der Kopfsiegelnaht 6 und der Quersiegelnaht 19 begrenzte Abschnitt des Folienbeutels enthält eine Handgriffausstanzung 23.In the embodiment of Fig. 6 the front face 1 and the back face 2 of the bag are connected by a vertical additional sealing seam 22 which is arranged next to the first gusset 3, extends from a transverse seam 19 adjoining the reclosing strip 7 to the top seal 6 and the gusset region above the reclosure of the filling material space of the bag separates. The transverse sealing seam 19 extends obliquely to the top seal seam 6, wherein the distance between the transverse seal seam and the top seal seam At the first end, which is adjacent to the vertical additional sealing seam 22, smaller than at the other end in the region of the second side fold 4. The section of the foil bag which is delimited by the top seal seam 6 and the transverse seal seam 19 contains a handle punching 23.

Claims (9)

  1. A film bag formed by folding a film, comprising a front surface (1), a rear surface (2), a laid-in first side fold (3) and a laid-in second side fold (4) and closed by a longitudinal sealing seam (5) and a top sealing seam (6),
    wherein a reclosure strip (7) is attached to the inside surface of the film bag below the top sealing seam (6), which reclosure strip (7) detachably connects the first side fold (3) with the adjacent front surface (1) and rear surface (2) of the bag,
    wherein the outer edges between the first side fold (3) and the adjacent front or rear surface (1, 2) consist of folded edges,
    wherein the first side fold (3) forms a reclosable chute, when a bag portion (8) above the reclosure strip (7) is torn open along a tear line (9) contained in the film for removing content, and
    wherein the film consists of an at least two-layer composite film, which comprises a layer (14) of a sealable plastic on the inside of the bag and a layer (15) of a non-sealable material on the outside of the bag,
    wherein the folded edges between the first side fold (3) and the front or rear surfaces (1, 2) are stiffened by longitudinal sealing seams (10) which extend as far as the top sealing seam (6) and are interrupted in the region of the reclosure strip (7),
    and wherein the ends of the reclosure strip (7) lie adjacent to a sealing seam (19, 21) which connects the front and rear surfaces (1, 2) of the film bag and extends as far as the top sealing seam (6) or the second side fold (4), characterised in that at the point, where the tear line (9) reaches the folded edges strengthened by the longitudinal sealing seams (10), notches (20) are provided in the longitudinal sealing seams (10) for initiating the tear.
  2. The film bag according to claim 1, characterised in that the tear line (9) consists of a combination of an embossed line (17) formed by hot-sealing and a laser seam (18) formed in the outer layer of the composite film and overlaying the embossed line.
  3. The film bag according to claim 1 or 2 characterised in that the tear line (9) extends in parallel with the reclosure strip (7) and the adjoining transverse sealing seam (19) closing the content chamber at the top, over the entire width of the film bag as far as the rims of the second side fold (4).
  4. The film bag according to one of claims 1 to 3, characterised in that the tear line (9) extends in parallel with the reclosure strip (7) and the ends with a vertical section at the top sealing seam (6).
  5. The film bag according to one of claims 1 to 3, characterised in that the front and rear surfaces (1, 2) of the bag are connected by a vertical additional sealing seam (22) which is arranged adjacent to the first side fold (3), extends from the transverse sealing seam (19) adjoining the reclosure strip (7) as far as the top sealing seam (6) and separates the side fold region above the reclosure from the content chamber of the bag.
  6. The film bag according to claim 5, characterised in that the transverse sealing seam (19) extends obliquely to the top sealing seam (6), wherein the distance between the transverse sealing seam and top sealing seam is smaller at the first end adjacent to the vertical additional sealing seam (22) than at the other end in the region of the second side fold (4).
  7. The film bag according to claim 5 or 6, characterised in that the section of the film bag delimited by the top sealing seam (6) and the transverse sealing seam (19) contains a hand grip punch-out (23).
  8. The film bag according to one of claims 1 to 7, characterised in that the length of the reclosure strip (7) is greater than the width of the first side fold (3), wherein a central section of the reclosure strip is attached to the inside surface of the side fold and wherein end sections of the reclosure strip adjoining thereon on both sides are connected with the inside of the front surface or rear surface (1, 2).
  9. The film bag according to one of claims 1 to 8, characterised in that the longitudinal sealing seam (5) closing the film bag on the shell side connects the second side fold (4) with the front or rear surface (1, 2) of the bag and forms an outer edge.
EP07764729.5A 2006-06-22 2007-06-20 Film bag Active EP2032454B2 (en)

Priority Applications (1)

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PL07764729T PL2032454T5 (en) 2006-06-22 2007-06-20 Film bag

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DE102006029119A DE102006029119A1 (en) 2006-06-22 2006-06-22 Film bag, has folding edges between first lateral edge and the front surface and rear surface, which are stiffends by longitudinal sealed seams, which extend up to top sealing seam
PCT/EP2007/005405 WO2007147568A1 (en) 2006-06-22 2007-06-20 Film bag

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EP2032454A1 EP2032454A1 (en) 2009-03-11
EP2032454B1 true EP2032454B1 (en) 2013-01-23
EP2032454B2 EP2032454B2 (en) 2019-09-11

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DK (1) DK2032454T3 (en)
ES (1) ES2401732T5 (en)
PL (1) PL2032454T5 (en)
PT (1) PT2032454E (en)
WO (1) WO2007147568A1 (en)

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PL2032454T3 (en) 2013-06-28
DE102006029119A1 (en) 2007-07-05
PL2032454T5 (en) 2020-07-27
ES2401732T3 (en) 2013-04-24
WO2007147568A1 (en) 2007-12-27
EP2032454A1 (en) 2009-03-11
EP2032454B2 (en) 2019-09-11
PT2032454E (en) 2013-04-16
ES2401732T5 (en) 2020-03-30
DE202006020936U1 (en) 2011-01-13
DK2032454T3 (en) 2013-03-11

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