HUE030966T2

HUE030966T2 - Gusseted bag made of a composite plastic tissue

Info

Publication number: HUE030966T2
Application number: HUE14180177A
Authority: HU
Inventors: Jens Koesters; Jochen Brauer
Original assignee: Mondi Halle Gmbh
Priority date: 2013-09-04
Filing date: 2014-08-07
Publication date: 2017-06-28
Also published as: US20150078684A1; MX2014010476A; DE102013109656A1; EP2845820B1; ES2587521T3; EP2845820A1; PL2845820T3; CA2860714A1; MX345844B; BR102014021673A2

Description

Closseied bag made M a composite plastic tissas i;HiSÇHj.PTj(>N;

The Invention relates to: a slds-gassot bag made of aplastic &brte «ötnpösite according to 4e'preamble of claim T A side-gusset bag eootprises » írom pssel. a rear panel and side gussets disposed bet ween the front panel and the rear panei which are connected re the fron! panel ami the rear panel by edge Más, The side-gusset bag is made of a plastie fabric composite that has a polymer him on the outer side of the bag and fabric connected to the polymer kirn made of polymer ribbons on the inner bag of the bag. The fabric and the polymer film on the outer side of the bag are connected^ flatly to each other and form a fixed plastie fabric composite. The side-gusset bag that ties flat is closed at one end by a xceboa of the froth panel, and side gosset sections which are disposed between the section of the hoot panel and the rear panel are folded onto She rear pastel to ibrsr a bottom gosset and are connected thereto. The front and rear panels form bag surfaces of equal size, The designation of these bag surfaces as “írom panel” and ‘Tsar panel" is intended to facilitate owiershrnding of the teaching according to she Invention and not intended to present any technical restriction, Tor 4a purpose, of femlitsflng .«ndmtendipg of the claimed technical teaching., within the framework of the disclosure of the Invention, the bag surface, onto which, film sections are fokled and attached, thereby forming the bottom gusset, is termed the hear panel,"

The flat-lying side-gusset bag can he fitted at the open end and is ölesed following Oiling, The füled stáe-gusset bag is provided as a packaging hag, particularly for pourable fill materials such as pelletized animal feed, Miter for amnsals, or similar materials. An a result of 4« ose of a plastic fabric composite, the side-gusset bag is particularly suitable for large packages thai have a significant tilled volume and a significant filled might Corresponding side-gusset bags are also designated as "side foki bags" in practice, where no differentiation is road« between these two terms within the framework of the present invention.

Side-gusset bags made of single- or multi-layer films not reinforced by a fabric typically have a bottom face formed by sealing seams. The sealing seams extend from a fold edge os. longitudinal sides of the front or rear panels, at an acute angle, in the direction of the bottom gusset. The sealing seams, which are also designated, as "corner seals", fimedoh such that the base of the side-gossei bag Is better burned to a flat bottom face when the side-gusset hag is filled with a product.

In practice, side-gusset bags marmikeínred. írom a plastic Mule composite do not have any sealing seams to shape the base, because the fabric surface m the inner side of She hag cannot be welded or can only be poorly welded. High welding temperatures are necessary to produce a sealmg seam arid liter« is the risk that the polymer structure ml the orienMiou of the polymer ribbons of the fabric will be destroyed by introducing too-grest thermal energy, Â farther problem for the »pplteattö» of welding seams between the flanks of the side gussets and the adjseeoi front: pattéi: or rear panel is the poor contact between the surfaces being connected, due to their fabric structure. Side-gusset bags made of plastic fabric composite materials which are fanned without comer seals on the bottom lace, have a, visually poor base shape following filling. The poor base shape also has negative influences on the volume of the container since the fill height is Increased If fite base is not placed correctly and this then needs to be taken: into aeconnt by a higher bag height. The problem «secure particularly with flat-lying sidc-gnsset bags having deep side gussets that form rectangular packages sites fihmg. iß order to be aids to apply sealing seams to foml the base surface o?:? side-gusset: bags manuthemred tom a plastie felnié eôtnposiie, the fabric, must be provided átver its entire surface or &{ least la sections with a sealable ousting which is produced, for exemple, by an extrusies: coatiisg or by application of a hot-melf glue, The ttse of coated fabrics made of umaxiully sketched· polymer ribbons* arai a coating made of a sealable polymer tor producing bags Is known from EP 2 188 438 BS. The coating of the fabric, surface efts plastic fabric composite in order to improve the scaling properties involves a complot m;mufoctonag process and requires an additional application of materitti that Involves eorrespotsdmgly higher costs.

It is known írom IIS 4 373 979 to côsmëeî a fabric made of polymer ribbons to a polymer surface by ultrasound welding, The fact that the tdtmsonod welding method can be used: to close the end of a film tube is described using the example of a side-gnssei bag. The weld points pmduced by ulttosOtmd welding am disposed in omitiple rows that extend transversely to the longitudinal: direction of the dim tube, in this case, the distance between the weld points Is selected such that each polymer ribbon of She fabric is captured by one weld point, OB I: 162 013 A discloses tt stand-up -pouch with a. side gusset with a corner weld seam disposed therein and tunning at an oblique angfo, forrnod dots a plurality of weld points,

Aplnst this background, it is the object of the invention to config?xre a sidg-gnssst bag mode of a plastic fabric composite so that it has a Hat and stable base surface after Sailing,

The subject matter of the invention and solation of this object is a side-gusset bag according to claim 1,

The Invention assumés â sido-gusset bag made of a pfestic fabric composite having a tfont pattéi, ti mar panel, arid side gussets disposed between the front panel and the tear parmi which ore connected to the frost panel and the rear pattéi by fold edges, A sect ion of the front panel amt aide gusset sections which are disposed between the section of tire frönt panel and the rear panel arc folded onto the rear panel to form a bottom gusset and are connected {hereto. The side-gusset bag which can be produced by Inkling aflat material web consists of a plastic fabric composite which comprises a polymer him ott the outer side of the bag and a fabric made of polymer ribbons connected to the polymer hint on the inner side of the bag. The polymer Him and tite fabric are firmly connected to one another and form a first compost;:«. The fabric is untreated and doss not have & scalable costing on the inner side of the bag. According to the invention, the fabric surface of the side gussets on the inner side of the bag are cosinesisd to the adjacent fabric surface of the front panel or rear panel by comer weld séants which extend from a fold edge on longitudinal sides of the front or fear wall at lift acute angle in the direction of the bottom gusset. I; is essential lor -he invention that the coftter weld seams have a structure with a grid pattern comprising a plurality of prosed torn! or linear weld points. According to tite inversion, a grid pattem comprising a plurality of weld points arranged consecutively and adjacent to each other is provided. As a result of a focal conneetjon at a plurality of weld points or Hoes which are oriented for example parallel or which across each other, the séant strength of the corner weld séants is tite same itt the longitudinal and transverse directions of She comer weld seams, in particular, no significant embrittlement pectus at the seam edges of foe comer weld seams, as can frequently be observed l.n the botssailsg of polymer films using hoi sealing bars.

The comer weld seams expediently extend up to tire bottom gusset, in this ease, the corner weld seams are oriented to such. a manner that they enclose at? angle between 30* and 68° with the bőttom gusset, According to one preferred embodiment of the Invention» the corner weld seams each encfose a equilateral iriasgulsr surfs.ee together wish the bottom gusset and ose edge-side told edge.

Use fabric of the plastie fabric composite cas in particular consist of a. mesh of sihbos-shsped polymer strips. The polymer ribbons of she mesh ptntahiy have a width between 2 mm sasd 5 mm its the longitudinal direction of the bag and in Use transverse direction of the hap wherein the polymer ribbons of the tsesh. extending its she longitudinal direction of the bag arid fa the transverse direction of the bag cm also in particular have substantially tea esesse width,

The corner weld seams arc expediently 2 mm to 10 mm wide wherein the grid pattern can-have 10 to »00 weld points relative to an ares of 10Ô muf, The weld points of the comer weld seams are preferably annnged on parallel· ila.es which ere aligned at ass angle of 4SÜ with respect to the longitudinal extension of the comer weld seams·. In this ease, at least ihren weld potes ate arranged on each tine at equidistant spaemgs adjacent to one another.

The plastic fabric composite is usually made of polyolefinic components, wherein the polymer trim on the inner side of the bag is a polypropylene film and in particular consists of à biâsMiy oriented polypropylene (BOPP), As an alternative, the polymer film on the inner side of the bag can consist of a polyester or polyamide (ÖPET, OTA), The fabric on Use inner side of the bag comprises muaxiaily stretched polymer ribbons which ore woven together and can be welded ou ihe surface. I he fabric then has orientions m the longitudinal and transverse directions.

The lower edge of Use front panel, the lower edge of Use "Sank of the side gussets adjacent to the ftontpanel, the id wer edge of tire fiaok of Ihe side gussets sdjaeeht to Ute tear panel and Use lower-edge of the rear panel are expediently offset With respect to each oiher In a fan shape so that the layers of the plastic fabric -composite folded along the bottom gusset «ach have a section thai directly shuts against Use rear panel and Is .preferably gltsed to the rear panel In this manner, the side-gusset bag has a stable bottom face that forms.» substantially -flat and stable bottes» surface following filling of Use side-puss«} bag, As a result of the use of a plastic fabric composite, the slde-gtssset bag according so the invention is suitable for large containers and ihr packaging of bulk goods having a high bulk weight.

The Invention is expiaiaCd its detail hereinafter with reference to a drawing showing only este exemplary embodiment in Use figures, shown schematically

Fig. 1. shows a view of the front pane; of a OaMying side-gusset bag,

Fig. 2 Shows a view of the rear passe! of the side-gussetbag shown in Fig, 1,

Fig, 3 shows a sectional view of the hag inner surface of tbs s.ide»gusset bag shown in Figs. I ássd 2,

Fig. 4 shows an enlarged view of a comer weld ses»? for shaping the bottom face'when SHlag the side-gusset bag,

Fig. $ shows the process principle for making the comer weld seam shown in Fig 4, f ig. § shows-a aide-gusset bug closed to form a packaging following the filling thereof,

Fig, '7 Shews ise cet «d$è profile -of SM film layers of a side gusset tube prie?' te flufog of tbs SIM

Invers st? form a bottom 1¾¾

Fig. 8 shows a varient of the sukj ect tnstter as shown in Fig. 4,

Figures: i and 2 show s lakh-SM side-gosset bag having a íróul panel t„ a rm panel 2, sod side gussets 3 disposed between thé Stmt panel and the rem panel, yfofoh are connected to the Soot panel I and tear panel t by fold edges 4. The side-gusset bag is fonnád frost a fist material web by folding« An overlap region I wbic.it is disposed on foe rear pastel 2 in foe exemplary embodiment is c-iosed by gluing. Tb« side-gusset bag is »pen at its upper end and can he filled in filling installations with a loose bulk material The skie-gossct bag is closed at its lower end whereby the closed «od forms a .fiat bottom fitce when the side-gusset bag is filled. Hie bottom face is formed by a section δ of the boat panel and. side gusset sections 7 Which are disposed between the section 6 of the front panel. I and the rear panel 2, which are folded onto tlte roar pane! 2 so as to form a bottom gusset 8 and are connected to the rear panel 2,

In order that the bottom bice is shaped better when the side-gttssel bag is filled, corner weld seams 9 are provided which extend at an acute angle torn tbs outer fold edge 4 on the longitudinal sides of the Iront Of rear panels !, 2 in the direction of the bottom gusset 8. The corner wold seams 9 can enclose an angle a betweett '$&> and m* wife foe bottom gusset 8.. In this exemplary embodiment and according to one oreforred embodiment of the invention, foe comer weld seams 9 each enclose a equiialetnlwdangular surface, together with the bottom gusset 8 and one edge w ide ibid edge 4.

The side-gusset bag sho wn la foe figures is made of a plastic fabric composite. The plastic fabric composite Isas at least two layers, and comprises a polymer film 10 on the outer side of the bag and a fabric- 1! connected in the polymer film K) and made of polymer ribbons 12 and 13 on the inner side of the bag. The polymer film 10 is firmly glued to the fabric 11. Tire plastic fabric composite is made for example of polyoleftnic eomptarents.

Figure 3 shows that the fabric i 1 consists of a mesh of strip-shaped polymer ribbons 12 and 13 wherein the polymer ribbons 12 in the longitudinal direction of the bag and the polymer ribbons 13 in foe transverse direction of foe bag can have a width for example between 2 nun and 3 nun. in fite exemplary embopdiment, the polymer ribbons 12 and 13 of the mesh extending m the longitudinal direction of the hag and in the transverse direction of the bag bave substantially ihc same width.

The fabric surface on the inner side of foe bag cannot be efficiently scaled. High seal tempemtures would be required, where the risk would exist that orientations .la the polymer ribbons 12 and 1.3 would be destroyed. The corner weld seams 9 am produced according to the invention by ultrasound welding and have a structure produced by uhrasotmd welding with a grid pattens comprising a plurality of weld pointa 14 arrenged consecutively and adjacently to one another. The weld peints 14 connect the fabric surface of the side gussets 3 on the inner side of the bag with the adjacent fabric suriaee of tbe: Iront panel 1 or rear panel 2. It also lies within foe framework of the invention that the stroepsre of the comer weld seam produced, by ultrasound, welding consists of an ammgemetk of linear weld points where the weld listes are aligned for example parallel or cross one other.

Tim process pHueiplu for producing the earner weld: seams 9· % «tasouftá welding Is shö'Wö te Fig. 5. High-irequenoy alternating eurruftt is produced by a- generator aud tmnsmkted to aft ultrasound éöuveriér teat generates a muehaskal ultrasound frequency teereimm, The high-fivsqueney -me&h&tftcal viheahons of a sunotrode IS are transmitted under pressure to-tee polÿsaer surfaces to be connected. The vibrations daring the ultrasound welding cause moleesdar and boundary surface friction is the joint sone, la tee process, the heat needed for the welding is created wherein the polymer materia! is plasticized at the weld points 1.4. .According to the diagram in Fig. 5. a counter bearing Id for ter sortokodé 15 engages at ter edge side into tee expanded side gussets 3. IHtmsound sealing has tbs advantage teat tee welding times are short and the thermal energyislargely formed in the contact tvgiotn with ike result teat other laminate regions and in particular the oriented .polymer ribbons 12 and 13 of the falum· 11 are less exposed to heat.

The corner weld seams 9 according to the diagram in fig, 4 each have- a width between 2 mm and IQ mm wherein, the grid pattern expediently comprises 10 to 500 weld points relative to an area of I0Ö mot2. ikt tee exemplary embodiment, the corner weld seam 9 Is shoot 4 mm wide and is composed of abous I OS weld points relative to m area of IÖ0 mm\ The diagram in Fig. 4 shows teat the weld points 1.4 of the sumer weld seams 9 are disposed on parallel lines 1.7 which are aligned at an angle of 45* to tee longíttullnai extension of the corner weld seams 9. At least three weld points 14 are arranged on each Hoe 1? next to -each other with equidistant spacing«. in. the exemplary embodiment of Fig. 8, a ventilation hole.24 is disposed in at least one triangular hag section 7' defined by a corner weld seam 9. An exchange of air is ensured between the hag section 7’ provided With tee ventilation hole 24 and the till space of tee side-gusset beg. The exchange of air is indicated by arrows. Is the exemplary embodiment,, the exchange of air is possible because the comer weld seras 9 mamtelns a distance item the bottom gusset 8 an d te s fold edge 4 on the longitudinal side of the bag. As an alternative or in addition tkeretb, the corner weld scam can for example be dlscööfteuous ίο order to ensure or promote the exchange of air between the triangular hag section 71 and the fill space of tee side-gusset bag.

The conter weld seams 9 provide a good base shape during filling of the side-gusset bag. After filling and closure of the upper «id, the side-gusset bag terms a Substantially pamllelepipedwhaped package with a Ian stable bottom tecs, as shown In Fig, 6,

The stde-psset bag made of a plastic fabric composite can be used for the packaging of loose bulk goods such as pelletized animal feed, litter for animals, or similar materials, sud is suitable as a bag particniady for large containers which have a significant filled voimae and a: significant .filled weight. Apart from the ted that the package has a well-shaped flat bottom tecs as a result: of the cottier weld seams % the bottom face must also be able to withstand a large load during filling and handling of tee bag. Since tee fabric surfaces on tee loner side of tee bag are not sealable, the materiel layers are preferably glued to each other. With a view to a firm adhesive bond., it is expedient if tee film layers to be glued: to each other to term a bottom lace have an edge profile with tee contour shown in Fig. 7, it cats he seen from ihe: diagram in Fig. 7, which shows a view of the rear panel s, that tee lower edge 18 often front panel 1, the lewer edge 19 of flank 20 of the side gusset 3 adjacent to the front, pártéi 1, tee lower edge 21 of Sank 22 of the side gusset 3 adjacent to the rear panel 2, and the lower edge 23 of the rear panel 2 are offset with, respect to each other in a: fan shape. As a result, the layers of the plastic tebrie

Claims

cottrposhs folded along the bottom gesses. 8 each have s section that shuts directly -against Site .rear panel: 2 and is gitted or welded to the rear .panel 2. Műanyag rétegelt szövetből készített rddairetMs tasak Sziäbadaitrd Igénypontok

1, Műanyag.rétegelt szövetből készített oldalfedés tasak egy homlokfallal (l), egy hátfallal (2), valamint a homlokfal és s hátfal közöst elrendezeti oldalfedőkkei (3), amelyek hajtási éleket? (4) keresztöl vannak a homlokfallal ( S) és a háttallal (2) összekötve, ahol a műanyag rétegeit szövet a tasak kőlsö oldalán egy polimer fóliával (10), míg a tasak. belső oldalán egy, a polimer fóliával (lö) összekötött, .polimer .szalagcsikokböl. (12, 13) álló szövettel (11) rendelkezik,, és ahol a homlokfal egy szakasza, valamint azok az oldalmdö-szakaszok, amelyek a homloktól szakasza (6) és a hátfal (2) között vannak, elrendezve, egy taipredö (8) képzése mellett a hátfalra (2) -vannak Visszahatva- és azzal összekötve, és az oldakedöknek (3) a tasak belső oldalán levő szövetfelüiete a homlokfal. (1) vagy a Mífaí (2) szomszédos szövetfóiűietévei s&rokvsrratok (9} állal van összekötve, ami jaiimtuzve, hogy a sarok varratok (9) egy ferde szög alatt -terjednek ki a taipredö (8) Irányába, ahol a samkvattatök. (9) ultrahangos hegesztéssel létrehozott szerkezettel rendelkeznek, számos pontszerű-vagy -vonalszerű hegesztési heiyböi áiló.:rácsmmtával> és hogy a sarokvarratok (9) ultrahangos hegesztéssel létrehozod szerkezete számos egymás után és egymás mellett -elrendezett hegesztési pontból (14) álló ráesmlmával rendelkezik,
2, Az 1. Igénypont- szerinti oldalredós msek, ami ßäfmte&s, hogy a sarokvamtok (9) a éalpmdőtg (8) vagy a ialpredö (3) közeiéig terjednek ki,
3, Az 1. vagy 2, igénypont szerinti öldalrédős tasak, auaíjéikmezvíh bog)-* nsarOkvarratok (9) a talpredövei (8). és egy szél oldali hajtási éllel (4 î együtt ogy-egy egyenlő szárú iíáfomszög-felidéiet határolnak.
4, Áz 1-3. igénypontok bármelyike szerinti oldaíredös tasák*. ami jellemezve, hogy legalább agy, egy sarokvarrat (9) által haláról! háromszög alakú tasakszakaszban.(?’) egy levegőztető nyílás (24) vast elrendezve és hogy a levegőztető nyílással {24} ellátóit táSakszakasz (?’) és az oldakodós tasak töltési térfogata közöt! légcsere van biztosítva, 5» A 4. -igénypont szerinti okiairedős tasak, ami jeUg&ezve, hogy a szövedék polimer szaíagcsfkjaí. (12, 13) a tasak hosszirányában és a tasak keresztirányában 2 mm és 5 mm közötti szélességgel rendelkeznek. é, A 4. vagy 5, igénypont szermii olduhedôs tasak, azzal jékmezm, hogy a szövedékhéfc a tasak hossziráttyábatt és a tasak ketesziMnyában kiterjedő polimer szalage-sfkjai (12, 13) agyanázön. szélességgel rendelkeznek. % A.« !.·*$> ígénypoatok bármölyike szerinti oklsiroáös lassk, su«í ßeikmezve, hogy s sarokvarmok (§).2'mm és 1:0 msi kftzötti szélességgel rehdé.ikezöék, ahol « fóesmitita ió · 500 hsgesztósi pontot (14) taitaimáz egy ÍOO ïambes féitilsíre voföjtksísMvk-
8. Az )··?. igénypontok bármelyike szerinti oidalredos tasak, r«z«/ ßeilem&ife, bogy a sarok varratok íh) hegesztési pontjaü -(14) párhuzamos vonalaké» (í?) vannak elrendezve, ametyhk a sarokvarraok (9) hosszam:! kiterjedéséhez képest 45*-os szög alatt vannak beiráityozva, és hagy mindegyik vonalai (1?) legalább három hegesztési pont (14) van egymás meikh egyenlő távolságokban cheodezve, & Az- 1-8. igénypontok bármelyike szerinti oidalredós tasak, pihwmave, hogy & homlokiM (1.) alsó széle (18), az oldakmdök 13) homlokfallal szomszédos oldalfalának (20) alsó szélé (19), as oldalrodok (3) hátlalkl öl-szomszédos oldalfalának (22) alsó széle (2|)f valamim a hátfal (2) alsó szélé (23) égytízáshfsz. képest iegyezSszerüea vannak eltolva, így a műanyag rétegelt szövetnek a taíprédó (8) mentés vissridsajíolí rétegei égy-egy olyast, szakasszal rendelkeznek, amely kóavetlénöl felfekszik a hátiálon (2) és a hátfallal (2) ősszé vas ragasztva,