EP3954623B1 - Verpackungsbeutel auf papierbasis sowie verfahren zur herstellung eines verpackungsbeutels - Google Patents
Verpackungsbeutel auf papierbasis sowie verfahren zur herstellung eines verpackungsbeutels Download PDFInfo
- Publication number
- EP3954623B1 EP3954623B1 EP21189673.3A EP21189673A EP3954623B1 EP 3954623 B1 EP3954623 B1 EP 3954623B1 EP 21189673 A EP21189673 A EP 21189673A EP 3954623 B1 EP3954623 B1 EP 3954623B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- stiffening
- packaging bag
- adhesive
- bag body
- 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
Links
- 238000004806 packaging method and process Methods 0.000 title claims description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims description 124
- 239000010410 layer Substances 0.000 claims description 102
- 239000012790 adhesive layer Substances 0.000 claims description 49
- 238000000576 coating method Methods 0.000 claims description 26
- 239000000123 paper Substances 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 24
- 239000004831 Hot glue Substances 0.000 claims description 16
- 239000003292 glue Substances 0.000 claims description 10
- 239000002655 kraft paper Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 description 18
- 239000000853 adhesive Substances 0.000 description 17
- 238000007789 sealing Methods 0.000 description 11
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000109 continuous material Substances 0.000 description 2
- 238000007765 extrusion coating Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229920001410 Microfiber Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000021485 packed food Nutrition 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B70/16—Cutting webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
-
- 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
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated 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
- B65D31/10—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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/16—Bags or like containers made of paper and having structural provision for thickness of contents of special shape
- B65D31/18—Triangular or conical bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
Definitions
- the present invention relates to a packaging bag with a paper-based bag body, which has opposite front walls, side walls arranged between the front walls and longitudinal edges connecting the front walls to the side walls, with a material section forming the associated front wall and a material section forming the associated side wall on at least one of the longitudinal edges
- Material sections for forming a stiffening fold running in the longitudinal direction are connected to one another directly or indirectly via a fixing layer adjacent to the longitudinal edge.
- stiffening folds can be provided on all longitudinal edges. In the context of the invention, however, it is also sufficient if a stiffening fold is provided on only one, two or three longitudinal edges.
- a paper-based bag body means a design in which the bag body is either made entirely of paper or has a multi-layer design in which at least one, several or preferably all layers are made of paper, but at least the Fixing layer immediately adjoins a paper layer.
- stiffening folds in packaging bags is basically known from the prior art and serves to increase the rigidity of the bag body.
- this describes WO 01/24999 A1 a packaging bag made of film material, with either inwardly or outwardly directed stiffening folds being formed by heat sealing corresponding material sections of an associated side wall and an associated front wall.
- the film material has a heat-sealable Coating, for example, made of polyethylene or is alternatively formed entirely from a heat-sealable material, so that the corresponding material sections can be connected to one another simply by applying heat, without the need to apply an additional layer with an adhesive effect.
- stiffening folds formed within the scope of this invention are preferably not intended to form an additional functional space.
- stiffening folds are, for example, from EP 2 284 090 B1 or the DE 10 2011 002 091 A1 known. From the DE 202 07 332 U1 It is known to form stiffening films for packaging bags made of unsealable plastics by introducing a hot melt layer.
- packaging bags that are made entirely or at least in significant parts from paper are increasingly coming into focus, for example for packaging food or animal products.
- the aim is usually to achieve a recycling rate of more than 80% by weight, preferably more than 90% by weight, particularly preferably more than 95% by weight.
- paper-based bag bodies have very little dimensional stability. This can happen especially with low grammages of paper This can be noticeable through unintentional extraction of the filled packaging bag, which has a negative impact on the visual appearance. Therefore, the introduction of stiffening folds is also desirable in such bag bodies.
- heat sealing of paper is generally only possible if the paper is coated with a heat-sealable surface.
- DE 1 807 453 U which describes a paper packaging bag with stiffening seams in which the stiffening folds are formed by a heat-sealable polymer coating as a fixing layer.
- the present invention is based on the object of specifying a packaging bag and a method for producing such a packaging bag in which the dimensional stability can be increased by forming stiffening seams and at the same time a high recycling rate can be achieved.
- the fixing layer assigned to at least one stiffening fold is an adhesive layer, with areas of the bag body between the stiffening folds being free of an adhesive layer.
- all stiffening folds are formed with a fixing layer of adhesive.
- the adhesive layer is therefore not a full-surface one Coating, for example, with a heat-sealable material. Rather, a separate adhesive layer is only specifically applied in the areas of the stiffening fold as a fixing layer, via which material sections of a front wall and a side wall are connected to one another in sections.
- the areas of the bag body which are free of such an adhesive layer relate to the same side, in particular to the inside of the packaging body, so that adhesive layers are only arranged in areas spaced apart from one another on one side of the bag body.
- the stiffening folds can extend either outwards or inwards into the bag body.
- an embodiment is preferred in which the stiffening folds are oriented towards the outside, so that the adhesive layers and also the areas that are free of an adhesive layer relate to the inside of the bag body.
- the adhesive layer or the adhesive layers assigned to the individual stiffening folds are formed from a glue or from a hot melt adhesive.
- the glue is preferably a water-soluble starch-based glue which contains no or only a very small proportion of solids.
- a hot melt adhesive is an adhesive that achieves its adhesive effect through physical hardening. Hot melt adhesives are solid at room temperature and can be processed by melting. The hot melt adhesive is applied in the molten state, with fixation then taking place as it cools down.
- the material sections of the associated front wall and side wall usually being folded over to each other in the course of production in such a way that a corresponding stiffening fold is formed in which the material sections are at least essentially opposite each other and either directly adjacent to one another or form a correspondingly small cavity.
- the adhesive layer can then be arranged at least partially within the associated stiffening fold or directly between the two material sections and then connect the material sections of the associated front wall and side wall directly to one another.
- Adhesive is therefore introduced directly into the stiffening fold, resulting in a three-layer structure in the stiffening fold consisting of the material sections of the front wall and the side wall as well as the adhesive layer.
- Such a configuration has the advantage that it can be produced very easily using a suitable process, although the adhesive directly adjoins the interior of the bag body and can therefore come into contact with the packaged goods, so that the adhesive has a corresponding release in the case of packaged foods must have for this.
- an embodiment can therefore be provided in which the adhesive layer is at least partially arranged outside the associated stiffening fold and at least one additional paper-based material layer connects the material sections of the front wall and side wall with one another.
- the at least one additional material layer is preferably arranged so that it covers the opening formed by the stiffening fold, so that it corresponds to the stiffening folds projecting outwards Is arranged inside the bag body. Accordingly, an adhesive application also takes place outside the stiffening folds, with this adhesive application only being intended to connect the additional material layer to the associated front and side walls. In contrast to introducing an adhesive layer directly into the stiffening fold, the stiffening fold is indirectly connected or fixed via the at least one additional material layer.
- the at least one additional material layer can, for example, be designed in the form of a strip and only extend in the longitudinal direction in the area of the respective stiffening fold.
- the at least one additional material layer can, for example, be designed in the form of a strip and only extend in the longitudinal direction in the area of the respective stiffening fold.
- four strip-shaped additional layers of material would therefore also be required in order to fix the stiffening folds.
- the at least one additional material layer can also be a tubular material layer that encloses the front walls and the side walls. This means that only one layer of material would be required in order to be able to fix all four stiffening folds, for example. Regardless of the exact design of the at least one additional material layer, a corresponding fixation is still carried out on all stiffening folds via an adhesive layer, since a connection must be made between the corresponding material sections of the front and side walls on all stiffening folds.
- one or more additional layers of material has the advantage that the adhesive does not come into direct contact with the packaged goods, since the adhesive layer is covered by the additional layer of material.
- additional material layer adhesive is applied directly into the fold of the bag.
- the material layer closes the opening formed by the stiffening fold, An effective demarcation is created between the area of the stiffening fold and the interior of the bag body.
- several layers of material for example two layers of material, can be arranged one above the other, such an arrangement referring to the fact that several layers of material are arranged in layers on top of each other in the area of only one stiffening fold.
- a strip-shaped material layer initially covers the respective stiffening folds and is fixed via an adhesive layer, with a further continuous tubular material layer surrounding the front and side walls then being provided over these strip-shaped material layers.
- Such a configuration has the advantage that the adhesive of the strip-shaped material layers has enough time to harden during production, since first the innermost, continuous material layer is arranged on the strip-shaped material layers and only then is the bag tube formed.
- the innermost material layer which surrounds the bag body from the inside, can also be connected to the bag body via further adhesive layers.
- further adhesive layers there is preferably no attachment via adhesive layers running in the longitudinal direction. Rather, there is only gluing in the top and bottom areas of the packaging bag, which is necessary anyway in order to close the packaging bag.
- a continuous layer of material surrounding the front and side walls can also be provided in order to fix the stiffening folds to a certain extent, with the additional material layer then protruding into sections in the area of the respective stiffening fold and will therefore itself fold over to a certain extent .
- a strip-shaped additional material layer can be arranged, which fixes the material layer adjacent to the bag body.
- Kraft paper is a packaging paper that is made from bleached or unbleached sulfate pulp and has high static and dynamic strengths. For this reason, such kraft paper is often used for packaging materials. If only one layer of kraft paper is formed, this is preferably the inner layer or the layer that forms the interior of the bag body.
- the inner layer of the bag body can also be designed with a fat barrier, in which case the inner layer is modified accordingly in order to prevent the passage of media through the bag body.
- a grease barrier can be formed using a thin coating, for example of polyvinyl alcohol (PVOH), which does not allow for a connection or seal.
- PVH polyvinyl alcohol
- a coating with polyvinyl alcohol can also be used as a base for an additional print layer. Since polyvinyl alcohol is water-soluble, this only slightly affects its recyclability.
- the individual fibers can also be coated, chemically modified and/or the spaces between the fibers can be filled with microfibers, for example.
- a modification cannot be equated with a coating of the bag body, for example with a heat-sealable polymer layer, in particular made of polyolefin.
- Such coatings are usually applied as part of an extrusion coating.
- the application of a grease barrier is merely a modification the actual paper layer, which does not occur during extrusion coating.
- a coated paper is preferably used for an outer layer, which, in contrast to kraft paper, has a higher surface quality and, above all, a lower roughness and thus results in a better visual appearance.
- the outer layer can then also be printed with high quality.
- the outer layer has a basis weight between 40 and 100 g/m 2 , in particular between 50 and 90 g/m 2 and the inner layer of kraft paper has a basis weight between 50 and 110 g/m 2 , in particular between 60 and 100 g/m 2 .
- the head and/or bottom area several alternatives have proven to be particularly suitable.
- the top or the bottom area is tightly closed, whereas the other area initially remains open in order to be able to fill it via this opening.
- the bottom area can be tightly closed, whereas in the head area at least one of the front walls is designed with a sealable coating, for example with a hot-melt adhesive sealing coating, in such a way that front walls can be sealed together to close the bag body after filling.
- a sealable coating can also be used in the base area instead of the head area be provided, in which case the bag is then closed in the bottom area after filling.
- the sealing coating is usually applied to the at least one front wall in a molten state and hardens there. During the sealing process, the hot melt adhesive is then melted again by the action of heat, which can form a sealing seam.
- an adhesive layer in particular a pressure-sensitive adhesive
- the pressure-sensitive adhesive can be a dispersion adhesive or a glue.
- a pressure sensitive adhesive made from hot melt adhesive is also conceivable.
- a distinction must be made between a hot melt adhesive sealing coating and a pressure sensitive adhesive made from hot melt adhesive. While a sealing coating is applied and then melted again later to seal, a pressure sensitive adhesive only needs to be heated once. In this melting state, such a pressure-sensitive adhesive is much stickier compared to a sealing coating, so that a resilient connection can be quickly created in order to be able to absorb the weight generated by the filling material.
- the material for the hot-melt adhesive sealing coating and for the pressure-sensitive adhesive made of hot-melt adhesive can differ from one another in terms of composition, melting behavior and/or viscosity.
- Both the sealable coating and the adhesive layer are preferably arranged only in the top or bottom area, so that there is no full-surface coating of the inside of the bag body.
- the width of this sealable coating running along the longitudinal direction can be between 5 and 40 mm, preferably between 10 and 30 mm.
- the sealable coating and/or the adhesive layer can be arranged, for example, on an inside of the bag body.
- the bag body can then be connected or sealed to one another on the inside.
- staggered cut is also conceivable in this context.
- one of the two front walls is shorter than the other front wall at a height running in the longitudinal direction.
- the protruding section of the longer front wall is then folded over onto the shorter front wall in such a way that the protruding section of the longer front wall lies with an inside on the outside of the shorter front wall.
- An adhesive layer can then be arranged between them for the connection. If the bag is not yet to be closed in this area, the longer front wall in the protruding section on the inside or the shorter front wall on the outside has a sealable coating for connecting the two front walls to one another.
- an adhesive layer or a sealable coating may be applied to one or both front walls on an outer side in the top and/or bottom area and for the packaging body to be folded over once or several times in the top and/or bottom area the front walls are closed.
- the front walls are then usually of the same length.
- a cover sheet can also be inserted into the bottom area and connected to the front and side walls via an adhesive layer.
- reclosures can also be provided which can close the packaging body again even after it has been opened for the first time make.
- Particularly preferred in this context are Velcro fasteners, whereby the individual fastening elements of the Velcro fasteners can be brought into contact with one another by folding over the front walls in the head area and then cooperatively close the bag body at the head end.
- a corresponding coating can also be provided for the bottom area, so that the bag body can also be closed there via a sealing seam.
- the side walls can also have side folds, whereby the packaging bag can be laid flat particularly well in an unfilled state, with side fold sections of the side walls then resting on one another.
- the stiffening folds make it possible to achieve a high degree of dimensional stability despite using a relatively thin bag material, with the packaging bag being designed in particular for a filling weight of between 0.5 and 15 kg, preferably between 1 and 5 kg.
- the packaging bag preferably has a width between 150 and 300 mm, particularly preferably between 180 and 280 mm, the width referring to the width of the front walls.
- the longitudinal height of the packaging bag is preferably between 350 and 800 mm, preferably between 380 and 500 mm.
- the width of the side walls is preferably between 60 and 170 mm, preferably between 80 and 130 mm.
- the invention furthermore relates to a method for producing a packaging bag according to the invention according to claim 11, wherein a material web is first fed in the production direction, the material web is pressed in at several positions spaced apart from one another in the transverse direction to form stiffening folds, an adhesive layer being applied to the material web in the area of the stiffening folds, which fixes the stiffening folds in the material web, by folding the material web a material tube with opposite front walls, between the Front walls arranged side walls and the front walls form longitudinal edges connecting the side walls and individual bag bodies are then separated from the material tube.
- the stiffening folds are preferably formed by using shaped sheets which are spaced apart both in the transverse direction and in the longitudinal direction. This achieves a clean fold without web distortion or wrinkling, since the spacing of the shaped sheets prevents the material web from being pulled into several folds at the same time.
- the stiffening folds are already introduced into the flat material web and thus before the formation of a material tube.
- an adhesive layer can be introduced into the stiffening folds at least in sections directly through the shaped sheets and, for fixation, opposing material sections of the material webs in the area of the stiffening folds can be connected to one another directly via the adhesive layer.
- one or more additional material layers are connected to the material web via adhesive layers arranged at least in sections outside the stiffening folds, the material layers being arranged on the material web in such a way that they cover the stiffening folds.
- the material layers can already be designed to be self-adhesive.
- an adhesive layer for example made of glue, can be applied to the additional material layers before application to the material web become.
- several layers of material can be arranged one on top of the other, with the design of the individual layers of material being able to refer to the comments on the packaging bag.
- an overlap area is formed which runs along the production direction, which is arranged in particular on one of the front walls and which is preferably closed via a previously applied adhesive layer running in the longitudinal direction, for example made of glue or a hot melt adhesive can be.
- a previously applied adhesive layer running in the longitudinal direction for example made of glue or a hot melt adhesive can be.
- the overlap area is arranged in one of the stiffening folds or immediately next to it, so that an undisturbed appearance results with regard to the front walls. If several layers of material are provided, they are preferably connected to each other via an overlap seam.
- a heat-sealable coating is preferably applied to a side of the material web forming the inside of the bag body in several sections arranged one above the other in the production direction.
- the sections are based on the arrangement of the bag bodies to be formed from them, with the heat-sealable coatings preferably being provided in a section to be defined as the head area.
- the Fig. 1 shows a packaging bag with a bag body 1, which has opposite front walls 2 and side walls 3 arranged between the front walls 2, which connect the front walls 2 to one another and wherein the front walls 2 and the side walls 3 adjoin one another via longitudinal edges 4.
- the side walls 3 are also designed with a side gusset, which divides the side walls 3 into two side gusset halves, which rest on one another when the bag body 1 is laid flat.
- stiffening folds 5 are also provided, which are each assigned to one of the longitudinal edges 4 and run in the longitudinal direction L.
- stiffening folds 5 are formed in the Fig. 2A , 2 B , 2C can be removed, whereby the one in the Fig. 1 Packaging bag shown has stiffening folds 5, which are like the left side of the Fig. 2A are trained. It should be noted that the left side of the Fig. 2A , 2 B , 2C and the right side of the Fig. 2A , 2 B , 2C shows different ways of designing the stiffening folds 5, so that only half of a bag body is shown in each design.
- the packaging body 1 is formed via a tubular preform, so that the material of the front walls 2 merges homogeneously into the side walls 3 at the longitudinal edge 4.
- the exception to this is the overlap seam 8, via which the bag body 1 is closed along the longitudinal direction L.
- the overlap seam 8 is arranged next to a stiffening fold 5, with the fixation taking place using an adhesive.
- the overlap seam 8 is formed from a glue or dispersion adhesive. In principle, however, it can also be a hot melt adhesive, with a dispersion adhesive being preferred.
- an adhesive layer 6 made of a hot-melt adhesive is provided, which is at least partially arranged within the assigned stiffening fold 6 and directly connects the assigned material sections of the front wall 2 and the side wall 3 to one another.
- Glue can also be considered as an adhesive.
- an additional material layer 7 is fixed in strip form via an adhesive layer 6 outside the stiffening fold 5 on material sections of the front wall 2 and the side wall 3, whereby the stiffening fold 5 is also held in position.
- the additional material layers 7 thus cover an opening of the stiffening fold 5 running in the longitudinal direction L, with areas between the additional material layers 7 being free of additional material.
- FIG. 2B An additional layer of material 7 is also provided, which is now not designed in the form of a strip, but which surrounds the front walls 2 and the side walls 3 within the bag body 1.
- This additional material layer 7 thus represents the actual inner wall of the bag body 1, which is in direct contact with the filled goods.
- This additional material layer 7 is connected in the corner areas via an adhesive layer 6 to the associated material sections of the front walls 2 and the side walls 3 in the area of the respective stiffening seam 5, with the stiffening fold 5 being fixed according to the type of embodiment on the right side of the Fig. 2A he follows.
- the strip-shaped design of the additional material layers 7 only one continuous material layer 7 and not several material layers 7 arranged next to one another have to be arranged on the material web forming the bag body 1 during the course of production.
- the Fig. 2C shows a further design variant, this time for the sake of simplicity no overlap seams 8, 8 'are shown, with an arrangement in an analogous manner to that Fig. 2A and 2 B can be done.
- Starting point for the design according to Fig. 2C forms the representation on the left side of the Fig. 2B , after which an additional material layer 7 surrounding the front walls 2 and the side walls 3 is attached to the bag body 1 via an adhesive layer 6.
- strip-shaped material layers 7 'and an adhesive layer 6 are then provided directly in the stiffening fold 5, the material layers 7' being in an analogous manner to the illustration on the right side of the Fig. 2A
- the areas of the additional material layer 7 extending into the stiffening fold 5 are now arranged to be fixed and stabilized in this position.
- All of the bag bodies 1 shown are also made entirely of paper, which is kraft paper. In principle, however, it is also possible for the outside, for example, to be formed using coated paper, which is particularly advantageous in terms of printability.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020004962.1A DE102020004962A1 (de) | 2020-08-14 | 2020-08-14 | Verpackungsbeutel auf Papierbasis sowie Verfahren zur Herstellung eines Verpackungsbeutels |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3954623A1 EP3954623A1 (de) | 2022-02-16 |
EP3954623B1 true EP3954623B1 (de) | 2024-01-03 |
Family
ID=77207134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21189673.3A Active EP3954623B1 (de) | 2020-08-14 | 2021-08-04 | Verpackungsbeutel auf papierbasis sowie verfahren zur herstellung eines verpackungsbeutels |
Country Status (7)
Country | Link |
---|---|
US (1) | US20220048678A1 (pl) |
EP (1) | EP3954623B1 (pl) |
CA (1) | CA3128190A1 (pl) |
DE (1) | DE102020004962A1 (pl) |
ES (1) | ES2973565T3 (pl) |
HU (1) | HUE065797T2 (pl) |
PL (1) | PL3954623T3 (pl) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4342812A1 (de) * | 2022-09-22 | 2024-03-27 | Mondi AG | Seitenfaltenbeutel |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2652972A (en) * | 1949-10-13 | 1953-09-22 | Bemis Bro Bag Co | Paper bag |
US2633286A (en) * | 1950-03-07 | 1953-03-31 | Bemis Bro Bag Co | Cover and its manufacture |
DE1807453U (de) | 1956-01-16 | 1960-03-03 | Habra Werk Ott Kg | Beutel fuer fluessige oder halbfluessige gueter aus papier sowie vorrichtung zu seiner herstellung. |
US3350859A (en) * | 1965-10-04 | 1967-11-07 | Studley Paper Company Inc | Vacuum cleaner filter bag |
US4096987A (en) * | 1976-08-30 | 1978-06-27 | The Ritter Company | Reinforced paper bag |
US4797010A (en) * | 1987-09-22 | 1989-01-10 | Nabisco Brands, Inc. | Reheatable, resealable package for fried food |
US5938339A (en) * | 1997-01-02 | 1999-08-17 | Ouchi; Toshikatu | Gored packing bag provided with an opening and closing fastener and method for producing same |
US6790468B1 (en) * | 1997-09-30 | 2004-09-14 | Cryovac, Inc. | Patch bag and process of making same |
WO2001024999A1 (en) | 1999-10-07 | 2001-04-12 | Molins Plc | Bag making |
DE20207332U1 (de) * | 2002-05-10 | 2002-09-12 | Bischof und Klein GmbH & Co. KG, 49525 Lengerich | Beutel, Sack o.dgl. Verpackung |
DE20218099U1 (de) * | 2002-11-22 | 2003-02-27 | Bischof + Klein GmbH & Co. KG, 49525 Lengerich | Sack für den Transport feuchtigkeitsempfindlicher Güter |
DE102005022743B4 (de) * | 2005-05-18 | 2011-02-10 | Nordenia Deutschland Halle Gmbh | Folienbeutel und Verfahren zu seiner Herstellung |
EP2284090B1 (de) | 2009-08-14 | 2013-02-27 | Mondi Halle GmbH | Beutel und Verfahren zu seiner Herstellung |
DE102011002091B4 (de) * | 2011-04-15 | 2016-09-15 | Nordenia Deutschland Halle Gmbh | Verpackung, insbesondere für sauerstoffempfindliche oder feuchtigkeitseempfindliche Produkte |
DE102012101932A1 (de) * | 2012-03-07 | 2013-09-12 | Nordenia Deutschland Halle Gmbh | Seitenfaltenbeutel aus einem Kunststoffgewebeverbund sowie Verfahren zu seiner Herstellung |
-
2020
- 2020-08-14 DE DE102020004962.1A patent/DE102020004962A1/de active Pending
-
2021
- 2021-08-04 HU HUE21189673A patent/HUE065797T2/hu unknown
- 2021-08-04 PL PL21189673.3T patent/PL3954623T3/pl unknown
- 2021-08-04 ES ES21189673T patent/ES2973565T3/es active Active
- 2021-08-04 EP EP21189673.3A patent/EP3954623B1/de active Active
- 2021-08-13 CA CA3128190A patent/CA3128190A1/en active Pending
- 2021-08-13 US US17/401,634 patent/US20220048678A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
ES2973565T3 (es) | 2024-06-20 |
US20220048678A1 (en) | 2022-02-17 |
PL3954623T3 (pl) | 2024-05-13 |
EP3954623A1 (de) | 2022-02-16 |
HUE065797T2 (hu) | 2024-06-28 |
DE102020004962A1 (de) | 2022-02-17 |
CA3128190A1 (en) | 2022-02-14 |
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