EP3114038A1 - Paper bag and production method for a paper bag - Google Patents
Paper bag and production method for a paper bagInfo
- Publication number
- EP3114038A1 EP3114038A1 EP16719770.6A EP16719770A EP3114038A1 EP 3114038 A1 EP3114038 A1 EP 3114038A1 EP 16719770 A EP16719770 A EP 16719770A EP 3114038 A1 EP3114038 A1 EP 3114038A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adhesive
- paper bag
- paper
- glue
- starch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 239000000853 adhesive Substances 0.000 claims abstract description 129
- 230000001070 adhesive effect Effects 0.000 claims abstract description 128
- 239000003292 glue Substances 0.000 claims abstract description 39
- 239000004568 cement Substances 0.000 claims abstract description 3
- 239000008187 granular material Substances 0.000 claims abstract description 3
- 239000010440 gypsum Substances 0.000 claims abstract description 3
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000009408 flooring Methods 0.000 claims 1
- 238000004026 adhesive bonding Methods 0.000 abstract description 6
- 241000220317 Rosa Species 0.000 abstract 1
- 229920002472 Starch Polymers 0.000 description 14
- 239000008107 starch Substances 0.000 description 14
- 235000019698 starch Nutrition 0.000 description 12
- 238000011109 contamination Methods 0.000 description 6
- 239000004831 Hot glue Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010073 coating (rubber) Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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
- 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
- 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
-
- 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
- B31B70/74—Auxiliary operations
- B31B70/79—Coating; Impregnating; Waterproofing; Decoating
-
- 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
- B31B70/74—Auxiliary operations
- B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
- B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
- B31B70/85—Applying patches or flexible valve inserts, e.g. applying film-like valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/14—Valve bags, i.e. with valves for filling
- B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/01—Ventilation or drainage of 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
- B31B2155/00—Flexible containers made from webs
- B31B2155/001—Flexible containers made from webs by folding webs longitudinally
- B31B2155/0014—Flexible containers made from webs by folding webs longitudinally having their openings facing transversally to the direction of movement
-
- 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
- B31B2160/00—Shape of flexible containers
- B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
-
- 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
-
- 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
Definitions
- the invention relates to a paper bag for particular fine-grained bulk material, such as cement, gypsum, granules, animal feed or the like, with a bottom and a top opposite the bottom, wherein the bottom and / or top are folded by adding the side panels to Thisfalzlinien and glued, in particular in the form of a cross or block floor.
- Another aspect of the invention relates to a special manufacturing method for such a paper bag.
- Generic paper sacks are known, for example from EP 1 858 769 B1.
- the usual sizes are 5 kilos, 10 kilos or 25 kilos distributed in the trade. They have one or more paper layers which are formed from paper or a paper composite and / or coated paper. It is also possible for layers of other materials to be present, for example a plastic film, as in the case of EP 1 858 769 B1.
- Such paper bags are usually made of continuous paper webs, the longitudinal edges are glued like a tube.
- the tube is cut into sections of suitable length and at the open ends the tube sections are folded and glued bottom and top to close the paper bag ground and / or head side.
- a cross or block bottom fold is selected here, wherein as a rule a scoring or the like is carried out to facilitate the folding in the region of the fold lines.
- the folding parts are glued by means of a glue, usually a starch-water mixture. For manufacturing reasons, however, the glue used must be left out in the region of the fold lines.
- the glue recess leaves a non-bonded area along the score lines and edges / margins in the bottom and / or top of the paper bag. This can create channels that allow the exit of the dust-like filling material even after closing the bag.
- the laying of the bottom / top causes a certain amount of paper, causing curls of the paper and wrinkles and displacements in the region of the abutting edges of the bottom center, also called bottom center line, arise.
- These waves, wrinkles and edges can not be fully adhered to the starch glue, as it does not penetrate completely and does not extend to the folded edge.
- the present invention therefore addresses the problem of providing dustproof paper bags.
- the invention is based on a generic paper bag with the features of the preamble of claim 1.
- at least one adhesive or adhesive agent which can be activated after application is provided for bonding the side parts, the application surface of which runs continuously at least from one side fold line to at least the opposite side fold line of the side parts.
- Essential to the invention is the application of a continuous adhesive or adhesive trace from a 9.falzline to the opposite Sofalzline, the surface shape, strength is arbitrary, which turns out to be preferable a strip shape.
- the application begins directly within the side fold lines and extends to at least the opposite side fold line.
- the subsequent activation allows the application at the beginning of the manufacturing process. In the deactivated state, there is thus no danger that individual machines will become dirty during the subsequent production process.
- Activation preferably takes place only immediately before the final collapsing of the paper bag. Therefore, individual fold lines and edge areas do not need to be recessed - as known from the use of a starch glue - but can be completely provided with the adhesive. As sofalzlinien are those fold lines understood by the side flaps are added.
- the two side flap fold lines are finally folded so that these fold lines lead to the outside of the bag.
- the Endinange which are formed at the cross bottom as outwardly pointed corner strokes and the block bottom as trapezoidal impacts.
- the side panels are folded inwardly about the side fold lines to bond them to the end panels and / or each other by means of the adhesive or adhesive.
- each end region of the side-fold lines i. provided in the region of the two end impacts, at least one continuous adhesive or adhesive surface.
- at least two, preferably four continuous application surfaces of the adhesive or adhesive can be provided both on the bottom part and on the upper part. If an integration of a valve for filling the paper bag is provided, can be dispensed with the application of adhesive or adhesive in the region of the valve tube.
- At least one adhesive surface extends between the end regions of the respective side-fold lines, in particular transversely to the bottom centerline, which lies between the respective side-fold lines and is intended to be closed by the combination of the side parts.
- the applied adhesive or adhesive surface extends beyond at least one of the 39falzlinien, preferably to immediately to the edge of the Endinconce or beyond on the back.
- a plurality of strip-like and parallel adhesive and / or adhesive surfaces preferably at least two parallel strips are provided in the region of each end of the upper part and / or bottom.
- a non-continuous adhesive or adhesive surface or strip the partial sections of which fall at least on the side-fold lines and / or the center-fold line.
- the application of such an adhesive pattern of at least two parallel adhesive or adhesive strips, ideally in combination with a non-continuous adhesive or adhesive strip is particularly advantageous if a different type of adhesive is additionally used for bonding the side parts.
- the adhesive surfaces with different types of adhesive can overlap or be arranged separately next to one another.
- the glue not in the region of the fold lines and not in the edge region of the side parts or strikes is applied, so the glue order spares these areas.
- a separately applied, possibly different type glue especially based on a starch-water mixture
- said glue not in the region of the fold lines and not in the edge region of the side parts or strikes is applied, so the glue order spares these areas.
- the application of the adhesive and / or adhesive according to the invention in areas adjacent to the glue application.
- Ideal is an alternating application of the glue and the adhesive and / or adhesive used in the folding direction. For example, in the fold line direction adjacent areas of the side parts are glued alternately with the starch glue or the adhesive or adhesive with the impacts. This procedure makes it possible to exploit the advantages of both types of adhesive in every relevant area of the bond.
- Bonding with starch glue on paper ensures a particularly good and mechanical firm bond, since good adhesion of the glued paper layers is achieved and the bond penetrates particularly deeply into the paper.
- the bonding with the adhesive or adhesive used is not so strong, but due to the application across the surface to the bottom finish, it ensures a completely adhesive bond, thereby avoiding the disadvantageous formation of channels or closing the resulting channels of starch adhesive bonding.
- a wet rubber or so-called envelope glue which can be activated by liquid or steam addition, in particular water or steam, is preferably used as the adhesive. This feature has the advantage that the adhesive, ie the wet rubber or the envelope glue, can be deactivated after application to the paper bag, for example by drying, in order to avoid soiling of the production machines during production. Immediately before or after folding, the adhesive can then be activated.
- a bonding agent for example, a sealing compound, preferably a cold seal mass are used, which is activated upon compression of provided with the sealing compound surfaces and then acts as an adhesive.
- a sealing compound preferably a cold seal mass are used, which is activated upon compression of provided with the sealing compound surfaces and then acts as an adhesive.
- An application of liquid or steam is not necessary in this case.
- a hot melt adhesive which is deactivated by cooling and can be reactivated with subsequent heat supply.
- At least one film for closing the paper bag by means of the adhesive and / or adhesive and / or the applied glue with the side panels and / or the Endinoeuvre be glued.
- the introduction of such a film also referred to as an inner bar, in particular a water and dust-tight film, serves to realize a particularly preferred closure of the paper bag.
- the actual dust-tight bag closure is therefore no longer due to the folding of the side parts, but only by the application of the film.
- the side parts are preferably combined and bonded as known.
- the inner bar-forming film may preferably be formed from paper and / or coated paper and / or plastic and / or a metal foil.
- the inner bar can cover the applied adhesive and / or adhesive agent surface either partially or completely. In the partial cover, the excess adhesive or adhesive area can serve for the bonding of the side parts.
- the invention relates to a method for producing the paper bag according to the invention with a folded bottom and / or top.
- an adhesive and / or adhesive is applied to a paper roll or paper web for producing the paper sacks and / or printed prior to folding the bottom or the upper part.
- the application of the adhesive and / or adhesive takes place in such a way that an inventive paper bag according to the present invention or an advantageous embodiment of the invention results. Only after applying the adhesive and / or adhesive surface on the paper roll or paper web, the paper bag is then folded in the floor and glued, the activation of the adhesive and / or adhesive used only immediately before or during collapsing or gluing the side panels he follows.
- a water-starch mixture is preferably applied in the floor layer, so that a gluing area with alternating adhesive / adhesive and starch glue surfaces is produced, in particular alternately in the direction of the side folding or bottom center lines.
- the activation of the pre-applied adhesive in the bottom layer can be activated by the addition of water and / or water vapor according to a preferred embodiment of the method.
- a water-starch mixture for bonding the side parts, it is expedient to simultaneously activate the applied adhesive in the bottom layer by this addition of water.
- a steam addition can also be effected by means of a pressure nozzle.
- At least one inner bar for airtight bag closure by means of the applied adhesive and / or adhesive and / or the starch-water mixture can be adhered to the folded but still unfolded bottom and / or top section.
- the application of the adhesive and / or adhesive to the paper web or paper roll is preferably carried out via a printing cylinder, which prints the desired surface shape in terms of the clock, so that the adhesive or adhesive pattern according to the invention results.
- the application of this adhesive and / or adhesive is advantageously carried out using a flexographic printing machine.
- the size and shape of the application surface and the application thickness of the adhesive can be made variable, for example, depending on the materials used and / or the production facility and / or the intended intended use of the produced paper bag, i. depending on the desired contents.
- the selected adhesive or adhesive is deactivated after application for subsequent grooving or otherwise processing the fold lines during the process, for example by active or passive drying of the applied adhesive, so that subsequently for the grooving or other processing used machine parts or tools are not polluted by the existing adhesive in this area.
- the adhesive can be activated.
- a hot melt adhesive which can be activated by heat.
- the hot melt adhesive is applied warm or hot to the paper sack and deactivated after the first application in ways of cooling. Later, then for the addition or closing of the bottom or upper part, the activation of the hot melt adhesive by heat.
- the adhesive effect can be activated by pressing together surfaces which are covered with the cold sealant.
- the cold sealant is not only applied between the sofalzlinien, but also on the To apply areas of the side parts, which is pressed onto the corresponding surface between the fold lines.
- FIG. 1 shows a schematic plan view of a paper bag according to the invention with base and upper part
- Figure 2 a plan view of the open bottom of a paper bag according to the
- FIG. 3 is a plan view of the open bottom of the paper bag according to the invention.
- Figure 4 a schematic representation of a section of a paper web for
- Figure 5 another plan view of the paper bag according to the invention with open bottom
- Figure 6 a plan view of the closed bottom of the invention
- FIG. 1 shows the paper bag 10 according to the invention with a cross bottom 2 and a top part 3, the bottom 2 and the top part 3 being folded on the front side 9 of the paper bag 10. Not recognizable is the back of the bag 10, which lies under the front side 9.
- a valve tube 50 is used to fill the paper bag 10.
- the paper bag may comprise two or more layers of paper or material.
- the concrete embodiment of the paper bag 10, that is, the number of used paper or material layers is irrelevant to the implementation of the invention, which is why not discussed in detail.
- a known per se valve 50 may be provided for filling the bag.
- FIG. 1 To illustrate the advantages of the present invention, initially an open partially folded bottom part 2 of a conventional paper bag 1 is considered, which is shown in FIG. To see a detail of the sack bottom 2 of the conventional paper bag 1 with cross bottom.
- the cross bottom 2 In the figure 2, the cross bottom 2, however, is not folded, but the side flaps 5 are opened and the corner impacts 6 recognizable.
- both side flaps 5 are folded inwards in the direction of arrow 7 and that along the respective soklappenfalzlinien 4, which are provided with a Bodenrillung.
- a glue 8 of a starch-water mixture is applied areally on the corresponding surfaces in order to glue the upper side flap 5 with the Eckeinellen 6 and the lower side flap 5 with the surface of the already folded side flap 5. Furthermore, it can be seen in FIG. 2 that the glue 8 is cut out in the area of the grooved upper and lower side flap fold lines 5 and this area thus remains without glue. The same applies to the edge regions of the corner impacts 6 and the side flaps 5, the outer edge remains completely free of glue.
- This recess has the technical background that during production, in particular when creating the Bodenrillung along the creasing lines 4, no glue on the necessary production tools may get to it or in an application of the glue in the edge region it would come to contamination of underlying machine parts. Because of the recess in the glue 8 along the fold lines 4 and in the edge region, however, an air and dust-permeable channel from which contents from the bag interior via the marking in Figure 6 arises adversely 1 Reinforcing the channel formation is characterized in that when folding the bottom of a compression of the paper occurs, which in addition to a corrugation of the paper as well as wrinkling and displacement in the region of the abutting edges the ground centerline 4 "is coming. These waves and wrinkles and edges can not be fully adhered to the starch glue 8, as this does not penetrate completely and does not reach to the folded edge.
- FIG. 1 The inventive approach is illustrated in FIG.
- the illustration likewise shows a detail of an open, partially folded cross base 2 of the paper bag 10 according to the invention.
- the features of the cross base 2 which are identical to those of the prior art are provided with identical reference numerals.
- the wet rubber lining 11 according to the invention is applied continuously between the two side fold lines 4 of the side parts 5.
- the prominent locations in the area of the side fold lines 4, the incisions 4 'and possible paper folds are airtight closed especially in the area of the bottom center 4 ", so that leakage of the contents is prevented when the paper bag 10 is closed.
- the wet rubber coating 11 is applied in a special adhesive pattern to the corner impacts 6 of the base 2.
- two parallel continuous adhesive strips 11 'and an interrupted adhesive strip 11 extendend from one side fold line 4 to the opposite side fold line 4.
- the adhesive strips 11', 11" are connected to each other via a full-surface adhesive surface 11 "'.
- This advantageous arrangement of the adhesive surface 11 serves to achieve an alternating application of activatable adhesive 11 and conventional starch glue 8 in the direction of the center fold line 4, whereby the positive properties of both adhesives 8, 11 can advantageously be utilized plotted according to FIG.
- an adhesive wet gumming 11 is proposed in the embodiment, but as alternatives are also the use sealant, in particular cold sealant, or a hot melt conceivable.
- the production process for the production of the paper bag 10 according to the invention with the dust-tightly sealed fold lines 4, 4 will be explained in the following:
- the adhesive in the form of wet gumming or the cold seal mass is applied cyclically to a paper roll or paper web 100 via a printing cylinder in a flexographic printing press. as shown in Figure 4.
- the adhesive 11 is applied in the region of the paper web 100, so that later in the subsequent process of bottom folding results in the adhesive pattern 11 shown in Figure 3.
- the size and shape of the application surface and the application thickness of the activatable adhesive 11 or the cold seal mass can be made variable, for example, depending on the material used for the production of the paper bag 10 or the manufacturing process used or depending on the selected product for the produced Paper bag 10.
- the paper web 100 is folded in the so-called tube machine in the longitudinal direction overlapping and glued and so formed into a tube and then cut to a suitable length.
- the pre-printed with the adhesive 11 or cold seal tube sections are subsequently transported to the bottom layer of the manufacturing process.
- the sack bottoms 2 are folded, as shown in FIG. 3, and the known glue mixture 8 for bonding the cross bottom 2, as shown in FIG. 5, is applied to the side parts 5 and the corner stops 6.
- the glue 8 used is based on a starch-water mixture, wherein care must be taken during the application that it is recessed in the region of the side flap fold lines 4 and the edge regions of the side flaps 5 and corner folds 6.
- a floor rinse is created along the side flap fold lines 4.
- the necessary to activate the adhesive 11 moistening is carried out by the applied starch-water mixture 8. This is achieved in that the adhesive 11 is activated by the capillary action of the paper.
- the water contained in the starch glue 8 spreads in the paper and diffuses to the adhesive sites 11, whereby these are dissolved and made adhesive in the manner of an envelope.
- the moistening of the adhesive 11 can be assisted by a suitable nozzle by means of water vapor.
- the applied cross bottom 2 of the paper bag 10 according to the invention is now well sealed in the region of the side flap fold lines 4, the bottom middle channel 4 "and the edge regions 4 ', so that no more contents can escape, in particular in the area of the marked sack edges 20 of FIG significantly dustproof and thus prevents contamination of the bottling plant at the customer, as well as contamination of the filled bags 10 on the pallet.
- the upper part 3 can be configured in analogy to the bottom 2.
- a so-called inner bar can additionally be applied, which closes the bottom part 2 of the paper bag 0 airtight.
- Such an inner bar consists for example of a plastic film which either completely covers the adhesive surfaces of the adhesive 11 or alternatively is only partially glued to certain surfaces of the adhesive 11. The bonding takes place in any case such that the opening of the bottom part 2 is completely airtight and dust-tight by means of the film is glued.
- the side parts 5 contribute to the dust-tight closure of the paper bag nothing, but the folding is only the optical design of the paper bag 10 for transport purposes. If an internal bolt is used, in principle, the rubber coating 11 could be dispensed with.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Making Paper Articles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL16719770T PL3114038T3 (en) | 2015-05-13 | 2016-04-20 | Paper bag and method of production for such a bag |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015006212.3A DE102015006212A1 (en) | 2015-05-13 | 2015-05-13 | Paper bag and method for producing a paper bag |
PCT/EP2016/000640 WO2016180513A1 (en) | 2015-05-13 | 2016-04-20 | Paper bag and production method for a paper bag |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3114038A1 true EP3114038A1 (en) | 2017-01-11 |
EP3114038B1 EP3114038B1 (en) | 2018-04-11 |
Family
ID=55862719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16719770.6A Active EP3114038B1 (en) | 2015-05-13 | 2016-04-20 | Paper bag and method of production for such a bag |
Country Status (14)
Country | Link |
---|---|
US (1) | US10633146B2 (en) |
EP (1) | EP3114038B1 (en) |
JP (1) | JP6974942B2 (en) |
KR (1) | KR102637476B1 (en) |
CN (1) | CN107074404B (en) |
AU (1) | AU2016261006B2 (en) |
BR (1) | BR112016030676B1 (en) |
DE (1) | DE102015006212A1 (en) |
DK (1) | DK3114038T3 (en) |
ES (1) | ES2676709T3 (en) |
MY (1) | MY189080A (en) |
PL (1) | PL3114038T3 (en) |
TW (1) | TWI691436B (en) |
WO (1) | WO2016180513A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018114001A1 (en) * | 2018-06-12 | 2019-12-12 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Multi-ply bag |
CN115697687A (en) * | 2019-11-11 | 2023-02-03 | 莱莫机械股份有限公司 | Improved packaging bag |
DE102020119749A1 (en) * | 2020-07-27 | 2022-01-27 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Packing bag and packing method |
WO2022096974A1 (en) * | 2020-11-04 | 2022-05-12 | Aggarwal Vedant | An apparatus and a method for manufacturing block bottom bags, and a block-bottom bag |
DE102021115063B4 (en) | 2021-06-10 | 2024-03-28 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | Process for producing paper sacks and paper sacks |
CN113844096A (en) * | 2021-09-27 | 2021-12-28 | 广州造纸股份有限公司 | Forming method of anti-leakage film-coated square-bottom paper bag |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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US221712A (en) * | 1879-11-18 | Improvement in paper bags | ||
US3231173A (en) * | 1964-10-16 | 1966-01-25 | Continental Can Co | Square bottom bag |
DE1436811A1 (en) | 1965-08-09 | 1968-11-14 | Honsel Karl Heinz | Process for the production of preferably multilayer cross-bottom bags made of paper, plastic or the like. |
CH480988A (en) * | 1967-09-01 | 1969-11-15 | Hesser Ag Maschf | Bag with a rectangular cross-section with a bottom closure |
US3955690A (en) * | 1974-09-23 | 1976-05-11 | International Paper Company | Dunnage bag end closure |
DE3719085A1 (en) * | 1987-06-06 | 1988-12-15 | Fr Noltemeyer Gmbh | BLOCK OR CROSSBODY BAG |
JP2002104435A (en) * | 2000-10-04 | 2002-04-10 | Oji Packaging Systems Co Ltd | Hexagonal bottom valve bag |
JP2003261151A (en) * | 2002-03-05 | 2003-09-16 | Meito Kk | Blowing inlet structure of packaging bag for powder |
US6805660B1 (en) * | 2003-04-07 | 2004-10-19 | Doug Finch | Process for manufacturing a flat-bottom bag and bag formed thereby |
US20050276938A1 (en) * | 2004-05-25 | 2005-12-15 | Mccormick Demetrius T | Adhesive for bag sealing application |
DE202005003539U1 (en) * | 2005-03-04 | 2006-07-13 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | paper bags |
DE102007015099A1 (en) | 2007-03-29 | 2008-10-02 | Construction Research & Technology Gmbh | Paper valve bag with inner latch |
US20110019938A1 (en) * | 2008-04-01 | 2011-01-27 | J.W.T. Snc Di Giacometti Stefano & Zanon Walter | Paper shopper or bag and system for the production thereof |
DE202009003080U1 (en) | 2009-03-04 | 2009-04-30 | Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh | paper bags |
DE102009036556A1 (en) * | 2009-08-10 | 2011-02-17 | Windmöller & Hölscher Kg | A method and apparatus for making a sack or bag with nonwoven material, and a sack or bag comprising nonwoven material |
DE202010010512U1 (en) | 2010-07-21 | 2010-10-28 | Segezha Packaging Gmbh | tear sheet |
US20120273561A1 (en) * | 2011-04-29 | 2012-11-01 | Adalis Corporation | Reinforcement for container |
-
2015
- 2015-05-13 DE DE102015006212.3A patent/DE102015006212A1/en not_active Withdrawn
-
2016
- 2016-04-20 CN CN201680002188.0A patent/CN107074404B/en active Active
- 2016-04-20 JP JP2016560381A patent/JP6974942B2/en active Active
- 2016-04-20 DK DK16719770.6T patent/DK3114038T3/en active
- 2016-04-20 EP EP16719770.6A patent/EP3114038B1/en active Active
- 2016-04-20 KR KR1020177000151A patent/KR102637476B1/en active IP Right Grant
- 2016-04-20 PL PL16719770T patent/PL3114038T3/en unknown
- 2016-04-20 MY MYPI2017700230A patent/MY189080A/en unknown
- 2016-04-20 AU AU2016261006A patent/AU2016261006B2/en active Active
- 2016-04-20 BR BR112016030676-7A patent/BR112016030676B1/en active IP Right Grant
- 2016-04-20 WO PCT/EP2016/000640 patent/WO2016180513A1/en active Application Filing
- 2016-04-20 US US15/304,752 patent/US10633146B2/en active Active
- 2016-04-20 ES ES16719770.6T patent/ES2676709T3/en active Active
- 2016-05-13 TW TW105114866A patent/TWI691436B/en active
Also Published As
Publication number | Publication date |
---|---|
BR112016030676A2 (en) | 2017-08-22 |
DK3114038T3 (en) | 2018-05-28 |
PL3114038T3 (en) | 2018-08-31 |
JP2018514466A (en) | 2018-06-07 |
CN107074404B (en) | 2019-10-22 |
KR102637476B1 (en) | 2024-02-19 |
AU2016261006A1 (en) | 2017-01-19 |
JP6974942B2 (en) | 2021-12-01 |
BR112016030676B1 (en) | 2022-02-08 |
DE102015006212A1 (en) | 2016-11-17 |
AU2016261006B2 (en) | 2020-07-23 |
EP3114038B1 (en) | 2018-04-11 |
MY189080A (en) | 2022-01-25 |
WO2016180513A1 (en) | 2016-11-17 |
US10633146B2 (en) | 2020-04-28 |
CN107074404A (en) | 2017-08-18 |
US20170137178A1 (en) | 2017-05-18 |
TWI691436B (en) | 2020-04-21 |
ES2676709T3 (en) | 2018-07-24 |
KR20180008371A (en) | 2018-01-24 |
TW201702145A (en) | 2017-01-16 |
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