EP0444261A1 - Flexible packaging container in the form of a bag or pouch, made from plastic film - Google Patents

Flexible packaging container in the form of a bag or pouch, made from plastic film Download PDF

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Publication number
EP0444261A1
EP0444261A1 EP90123842A EP90123842A EP0444261A1 EP 0444261 A1 EP0444261 A1 EP 0444261A1 EP 90123842 A EP90123842 A EP 90123842A EP 90123842 A EP90123842 A EP 90123842A EP 0444261 A1 EP0444261 A1 EP 0444261A1
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EP
European Patent Office
Prior art keywords
wall part
air
bag
packaging container
sack
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Granted
Application number
EP90123842A
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German (de)
French (fr)
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EP0444261B1 (en
Inventor
Paul Diakonow
Ralf Wesselmann
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Bischof and Klein SE and Co KG
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Bischof and Klein SE and Co KG
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Publication of EP0444261A1 publication Critical patent/EP0444261A1/en
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    • 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

Definitions

  • the invention relates to a flexible packaging container in the form of a sack or bag made of plastic film or the like.
  • Air-impermeable material with an air outlet area of a sack wall in which the sack material, as the outer wall part, provides perforations for an air passage from the filling space of the sack and the perforated sack material on the inside of an air-permeable one Inner wall part is covered.
  • Flexible packaging containers of this type in the form of a sack or bag are known in numerous embodiments, the head end and the bottom of the sack being able to be closed by simple end weld seams and the like. Instead, the two bag ends can also be closed by a shaped bottom, for example a cross bottom with corner inserts and bottom side envelopes lying opposite one another in pairs and optionally an outer bottom cover sheet connected to them.
  • the sack material can be single-layer or multi-layer and consists primarily of plastic film or a plastic ribbon fabric, to give the packaging container its airtight character.
  • Such packaging containers offer the filling material above all a high level of moisture protection, as is desired for the storage of numerous filling goods.
  • the invention has for its object to provide a flexible packaging container in the form of a sack or bag of the type mentioned, in which an effective venting process can be maintained when filling the packaging container using pneumatic filling devices.
  • the inner wall part in turn consists of air-impermeable material such as plastic film and is also provided with perforations for its air-permeable design, but which have a design and arrangement for a larger air passage than the perforations of the outer wall part in the air outlet area of the sack wall , and that the inner wall part and the outer wall part together delimit an air chamber which is closed on all sides at the edge.
  • the air chamber delimited by these is filled with air during the filling process due to the different air passages of the inner wall part and outer wall part.
  • valve bag made of plastic film designated as a whole by 1
  • the valve bag 1 is closed at its head end 2 and at its bottom 3 by a transverse weld seam or a molded bottom.
  • a filling valve 4 is incorporated into the sack.
  • the bag wall 5 is formed by an initially flat piece of plastic film which, as can be seen in FIG. 2, is closed by a double longitudinal seam to form a bag tube.
  • the double longitudinal seam comprises two individual longitudinal seams 6 and 7, which connect mutually correspondingly overlapping longitudinal edge parts of the sack wall 5. This forms an outer wall part 8 and an inner wall part 9 of the sack wall 5.
  • the wall parts 8 and 9 define an air outlet area of the bag wall 5, in which air outlet openings or perforations 10 and 11 are incorporated into the outer wall part 8 and the inner wall part 9 of the bag wall 5, respectively.
  • the air passage caused in this way is dimensioned considerably larger in the inner wall part 9 than in the outer wall part. This is achieved, for example, in that, assuming the same size of the perforations 10, 11, a larger number of perforations 11 is provided in the inner wall part 9 than perforations 10 in the outer wall part 8, with the rest being uniformly distributed over the air outlet area.
  • the air passage through the inner wall part 9 can be twice as large as through the outer wall part 8.
  • the outer wall part 8 and the inner wall part 9 together delimit an air chamber 12 which passes through the longitudinal seams 6 and 7 at their longitudinal edges and at their transverse ends the closures of the head end 2 and of the bottom 3 is closed.
  • the outer wall part 8 and the inner wall part 9 are held at a mutual distance by spacers 13 arranged in the air chamber 12, so that a flat abutment of the two wall parts 8, 9 is always avoided.
  • these spacers 13 are formed in a simple manner from material characteristics which are directed towards the air chamber 12 from at least one of the two wall parts 8, 9.
  • an air outlet area can be formed at another point of the bag 1 by attaching a separate material strip on the inside or outside of the bag wall 5 by longitudinal seams corresponding to the longitudinal seams 6 and 7 to form the air chamber 12, which is closed on all sides . It is essential that the outer wall part 8 and the inner wall part 9 always have essentially the same material properties, in particular with regard to their strength and their expansion behavior. This condition is of course fulfilled from the outset in the exemplary embodiment shown, in which the two wall parts 8 and 9 are formed by overlapping the side edges of the sack wall 5.
  • Fig. 1 the venting process during the filling of the bag 1 is schematically illustrated.
  • a highly air-enriched filling material 14 (100 l / min.) Is filled in according to the arrow 4a with an assumed pressure of 0.2 bar.
  • the air passage of the outer wall part 8 is set so that it z. B. 50 ltr./min. is while the air passage of the inner wall part 9 z. B. 100 l / min. is.
  • more air is fed into the air chamber 12 through the inner wall part than can escape to the outside through the outer wall part 8, as is symbolized by the flow arrows 15 and 16.
  • the excess air thus flows back from the air chamber 12 into the sack inner, as illustrated by the flow arrows 17.
  • a negative pressure is created, as the arrow 18 shows.
  • the pressure can be 0.05 bar compared to the pressure of 0.2 bar in the air chamber 12.
  • the air circulation generated in this way ensures effective ventilation of the bag 1 during the entire filling process. Any disruptive dust escapes could be prevented in a manner known per se by attaching filter materials at a suitable point in the ventilation area.

Abstract

A flexible packaging container (1) in the form of a bag or pouch made from plastic film or similar material which is impermeable to air is described which has in the bag wall (5) an air outlet region in which the bag material as an outside wall part (8) is provided with perforations (10) for passage of air from the filling space (20) of the bag and the perforated bag material is covered on the inside by an air-permeable inside wall part (9). The inside wall part (9) consists, in turn, of material, such as plastic film, which is impermeable to air and, for its air-permeable construction, is likewise provided with perforations (11) which, however, have a construction and arrangement for a greater air passage than the perforations (10) of the outside wall part (8) in the air outlet region of the bag wall (5), the inside wall part (9) and the outside wall part (8) jointly bounding an air chamber (12) which is closed all round at the edge. <IMAGE>

Description

Die Erfindung betrifft ein flexibles Verpackungsbehältnis in Form eines Sackes oder Beutels aus Kunststoffolie oder dgl. luftundurchlässigem Material mit einem Luftaustrittsbereich einer Sackwand, in dem das Sackmaterial als Außenwandteil mit Perforationen für einen Luftdurchlaß aus dem Füllraum des Sackes versehen und das perforierte Sackmaterial innenseitig von einem luftdurchlässigem Innenwandteil abgedeckt ist.The invention relates to a flexible packaging container in the form of a sack or bag made of plastic film or the like. Air-impermeable material with an air outlet area of a sack wall, in which the sack material, as the outer wall part, provides perforations for an air passage from the filling space of the sack and the perforated sack material on the inside of an air-permeable one Inner wall part is covered.

Derartige flexible Verpackungsbehältnisse in Form eines Sackes oder Beutels sind in zahlreichen Ausführungsformen bekannt, wobei das Kopfende und der Boden des Sackes durch einfache Endschweißnähte und dgl. einen Flachboden ausbildende Maßnahmen geschlossen sein können. Statt dessen können die beiden Sackenden auch Durch einen Formboden, beispielsweise einen Kreuzboden mit paarweise einander gegenüberliegenden Eckeinschlägen und Bodenseitenumschlägen und gegebenenfalls einem mit diesen verbundenen äußeren Bodendeckblatt, geschlossen sein. Das Sackmaterial kann dabei einlagig oder mehrlagig ausgeführt sein und besteht in erster Linie aus Kunststoffolie oder einem Kunststoff-Bändchengewebe, um dem Verpackungsbehältnis seinen luftundurchlässigen Charakter zu verleihen. Derarige Verpackungsbehältnisse bieten dem Füllgut vor allem einen hohen Feuchtigkeitsschutz, wie es für eine Lagerung zahlreicher Füllgüter erwünscht ist.Flexible packaging containers of this type in the form of a sack or bag are known in numerous embodiments, the head end and the bottom of the sack being able to be closed by simple end weld seams and the like. Instead, the two bag ends can also be closed by a shaped bottom, for example a cross bottom with corner inserts and bottom side envelopes lying opposite one another in pairs and optionally an outer bottom cover sheet connected to them. The sack material can be single-layer or multi-layer and consists primarily of plastic film or a plastic ribbon fabric, to give the packaging container its airtight character. Such packaging containers offer the filling material above all a high level of moisture protection, as is desired for the storage of numerous filling goods.

Während der befüllung des Verpackungsbehältnisses mit Hilfe pneumatischer Füllvorrichtungen, die das in der Regel staub- bzw. rieselfähige Füllgut über ein in einen der Formböden oder beispielsweise in eine Sacklängsnaht eingearbeitetes Füllventil (oder eine sonstige geeignete Öffnung) unter Druck in den Füllraum des Verpackungsbehältnisses fördern, treten aufgrund der Luftundurchlässigkeit des Sackmaterials insbesondere bei hoch luftangereicherten Füllgütern Entlüftungsprobleme auf, da die in das Verpackungsbehältnis durch den Füllvorgang eingedrückte Luft nicht oder nur langsam entweichen kann. Hierdurch wird die Geschwindigkeit, mit der solche sack- oder beutelförmigen Verpackungsbehältnisse befüllt werden können, merklich herabgesetzt.During the filling of the packaging container with the aid of pneumatic filling devices which convey the generally dust-free or free-flowing filling material under pressure into the filling space of the packaging container via a filling valve (or another suitable opening) incorporated in one of the mold bases or, for example, in a longitudinal bag seam, Due to the airtightness of the bag material, venting problems occur in particular in the case of highly air-enriched filling goods, since the air pressed into the packaging container by the filling process cannot escape or can escape only slowly. As a result, the speed at which such sack or bag-shaped packaging containers can be filled is noticeably reduced.

Zur Lösung des Entlüftungsproblems sind bereits zahlreiche Vorschläge bekannt geworden, bei denen das Sackmaterial bzw. die Kunststoffolie bereichsweise mit Entlüftungsöffnungen bzw. -perforationen versehen ist, durch die die beim Füllvorgang in das Verpackungsbehältnis eingetragene Luft nach außen entweichen kann. Um dabei zu vermeiden, daß das staubförmige Füllgut nach außen mitgerissen wird, sind Filtermaterialen wie Vliesstoffe oder Filterpapiere in den verschiedensten Ausführungsformen mit dem perforierten Sackwandteil kombiniert worden, um diesen abzudecken. Die bekannten Lösungsvorschläge sind jedoch sämtlich mit dem Nachteil behaftet, daß sich die einzelnen Sackwandteile, d. h. der perforierte Außenwandteil und der diesen innenseitig abdeckende Filtermaterialteil, beim Füllvorgang dicht aneinanderlegen, wodurch die Entlüftungswirkung stark herabgesetzt wird. Hinzu kommt, daß in Abhängigkeit von der Körnigkeit des Füllmaterials die Luftaustrittsöffnungen bzw. Filtermaterialien vor alle durch feinkörniges, staubförmiges Füllgut sehr rasch verstopft werden und somit keine wirksame Entlüftung mehr stattfinden kann.To solve the venting problem, numerous proposals have already become known in which the sack material or the plastic film is partially provided with venting openings or perforations through which the air introduced into the packaging container during the filling process can escape to the outside. In order to avoid that the dust-like filling material is entrained to the outside, filter materials such as nonwovens or filter papers have been combined in various embodiments with the perforated bag wall part in order to cover it. However, the known proposals for solutions all have the disadvantage that the individual sack wall parts, ie the perforated outer wall part and the filter material part covering this inside, lie close together during the filling process, as a result of which the ventilation effect is greatly reduced. In addition, depending on the granularity of the filling material, the air outlet openings or filter materials are all clogged very quickly by fine-grained, dust-like filling material and thus there is no longer any effective ventilation can.

Der Erfindung liegt die Aufgabe zugrunde, ein flexibles Verpackungsbehältnis in Form eines Sackes oder Beutels der eingangs angegebenen Art zu schaffen, bei dem ein wirksamer Entlüftungsvorgang bei der Befüllung des Verpackungsbehaltnisses mit Hilfe pneumatischer Füllvorrichtungen aufrechterhalten werden kann.The invention has for its object to provide a flexible packaging container in the form of a sack or bag of the type mentioned, in which an effective venting process can be maintained when filling the packaging container using pneumatic filling devices.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß der Innenwandteil seinerseits aus luftundurchlässigem Material wie Kunststoffolie besteht und zu seiner luftdurchlässigen Ausbildung ebenfalls mit Perforationen versehen ist, die jedoch eine Ausbildung und Anordnung für einen größeren Luftdurchlaß als die Perforationen des Außenwandteils im Luftaustrittsbereich der Sackwand aufweisen, und daß der Innenwandteil und der Außenwandteil gemeinsam eine randseitig allseits geschlossene Luftkammer begrenzen. Bei dieser Ausgestaltung wird während des Füllvorganges aufgrund der unterschiedlichen Luftdurchlässe von Innenwandteil und Außenwandteil die von diesen begrenzte Luftkammer mit Luft gefüllt. Während der Befüllung, bei der sich das Füllgut nach unten hin zunehmend verdichtet, entsteht im Füllgut selbst ein Unterdruck gegenüber dem in der Luftkammer herrschenden Druck, mit der Folge, daß die Perforationen des Innenwandteils zum Füllraum hin freigeblasen werden und eine Luftzirkulation zwischen der Luftkammer und dem Füllgut im Füllraum erreicht wird, die ohne nennenswertes Ausstauben von Füllgut nach außen eine wirksame Entlüftung des Verpackungsbehältnisses bis zum Befüllungsende aufrechterhält, woraufhin sich der verbleibene Restanteil von Luft zwanglos über den perforierten Außenwandteil abbauen kann.This object is achieved according to the invention in that the inner wall part in turn consists of air-impermeable material such as plastic film and is also provided with perforations for its air-permeable design, but which have a design and arrangement for a larger air passage than the perforations of the outer wall part in the air outlet area of the sack wall , and that the inner wall part and the outer wall part together delimit an air chamber which is closed on all sides at the edge. In this embodiment, the air chamber delimited by these is filled with air during the filling process due to the different air passages of the inner wall part and outer wall part. During the filling process, during which the filling material increasingly compresses towards the bottom, a negative pressure is created in the filling material itself compared to the pressure prevailing in the air chamber, with the result that the perforations of the inner wall part are blown free towards the filling chamber and air circulation between the air chamber and the filling material is reached in the filling chamber, which maintains an effective ventilation of the packaging container to the end of the filling without any significant dusting of the filling material to the outside, whereupon the remaining residual portion of air can easily dissipate via the perforated outer wall part.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachstehenden Beschreibung in Verbindung mit der Zeichnung, in der ein Ausführungsbeispiel des Gegenstands der Erfindung schematisch veranschaulicht ist. In der Zeichnung zeigen:

Fig. 1
ein erfindungsgemäßes Verpackungsbehältnis aus Kunststoffolie in Form eines Flachsackes im Längsschnitt und
Fig. 2
einen Querschnitt durch das Verpackungsbehältnis nach Fig. 1.
Further features and advantages of the invention emerge from the claims and the following description in conjunction with the drawing, in which an exemplary embodiment of the object of the invention is illustrated schematically. The drawing shows:
Fig. 1
an inventive packaging container made of plastic film in the form of a flat bag in longitudinal section and
Fig. 2
2 shows a cross section through the packaging container according to FIG. 1.

In der Zeichnung ist als flexibles Verpackungsbehältnis aus luftundurchlässigem Material ein als Ganzes mit 1 bezeichneter Ventilsack aus Kunststoffolie dargestellt. Der Ventilsack 1 ist an seinem Kopfende 2 und an seinem Boden 3 jeweils durch eine Querschweißnaht oder einen Formboden geschlossen. Im Bereich des Kopfendes 2 ist ein Füllventil 4 in den Sack eingearbeitet.In the drawing, a valve bag made of plastic film, designated as a whole by 1, is shown as a flexible packaging container made of air-impermeable material. The valve bag 1 is closed at its head end 2 and at its bottom 3 by a transverse weld seam or a molded bottom. In the area of the head end 2, a filling valve 4 is incorporated into the sack.

Die Sackwand 5 ist von einem anfänglich flachen Kunststoffolienstück gebildet, das, wie aus Fig. 2 ersichtlich, durch eine Doppellängsnaht zu einem Sackschlauch geschlossen ist. Die Doppellängsnaht umfaßt zwei einzelne Längsnähte 6 und 7, die einander entsprechend weit überlappende Längsrandteile der Sackwand 5 miteinander verbinden. Hierdurch ist ein Außenwandteil 8 und ein Innenwandteil 9 der Sackwand 5 gebildet. Die Wandteile 8 und 9 definieren einen Luftaustrittsbereich der Sackwand 5, in dem Luftaustrittsöffnungen bzw. Perforationen 10 und 11 in den Außenwandteil 8 bzw. den Innenwandteil 9 der Sackwand 5 eingearbeitet sind.The bag wall 5 is formed by an initially flat piece of plastic film which, as can be seen in FIG. 2, is closed by a double longitudinal seam to form a bag tube. The double longitudinal seam comprises two individual longitudinal seams 6 and 7, which connect mutually correspondingly overlapping longitudinal edge parts of the sack wall 5. This forms an outer wall part 8 and an inner wall part 9 of the sack wall 5. The wall parts 8 and 9 define an air outlet area of the bag wall 5, in which air outlet openings or perforations 10 and 11 are incorporated into the outer wall part 8 and the inner wall part 9 of the bag wall 5, respectively.

Der auf diese Weise bewirkte Luftdurchlaß ist beim Innenwandteil 9 erheblich größer als beim Außenwandteil bemessen. Dies ist z.B. dadurch erreicht, daß, bei angenommener gleicher Größe der Perforationen 10,11, eine größere Anzahl von Perforationen 11 im Innenwandteil 9 als Perforationen 10 im Außenwandteil 8 bei im übrigen jeweils gleichmäßiger Verteilung über den Luftaustrittsbereich vorgesehen ist. Beispielsweise kann auf diese Weise der Luftdurchlaß durch den Innenwandteil 9 doppelt so groß sein wie durch den Außenwandteil 8. Der Außenwandteil 8 und der Innenwandteil 9 begrenzen dabei gemeinsam eine Luftkammer 12, die an ihren Längsrändern durch die Längsnnähte 6 und 7 und an ihren Querenden durch die Verschlüsse des Kopfendes 2 und des Bodens 3 geschlossen ist.The air passage caused in this way is dimensioned considerably larger in the inner wall part 9 than in the outer wall part. This is achieved, for example, in that, assuming the same size of the perforations 10, 11, a larger number of perforations 11 is provided in the inner wall part 9 than perforations 10 in the outer wall part 8, with the rest being uniformly distributed over the air outlet area. For example, in this way the air passage through the inner wall part 9 can be twice as large as through the outer wall part 8. The outer wall part 8 and the inner wall part 9 together delimit an air chamber 12 which passes through the longitudinal seams 6 and 7 at their longitudinal edges and at their transverse ends the closures of the head end 2 and of the bottom 3 is closed.

Durch in der Luftkammer 12 angeordnete Abstandhalter 13 sind der Außenwandteil 8 und der Innenwandteil 9 in einem gegenseitigen Abstand gehalten, so daß stets ein flaches Aneinanderliegen der beiden Wandteile 8,9 vermieden ist. Diese Abstandhalter 13 sind bei den dargestellten Beispiel auf einfache Weise von Materialausprägungen gebildet, die von zumindest einem der beiden Wandteile 8,9 zur Luftkammer 12 hin gerichtet sind.The outer wall part 8 and the inner wall part 9 are held at a mutual distance by spacers 13 arranged in the air chamber 12, so that a flat abutment of the two wall parts 8, 9 is always avoided. In the example shown, these spacers 13 are formed in a simple manner from material characteristics which are directed towards the air chamber 12 from at least one of the two wall parts 8, 9.

Anstelle des von der Doppellängsnaht definierten Luftaustrittsbereichs kann an einer anderen Stelle des Sackes 1 ein Luftaustrittsbereich dadurch gebildet werden, daß ein gesonderter Materialstreifen innenseitig oder außenseitig auf der Sackwand 5 durch Längsnähte entsprechend den Längsnähten 6 und 7 zur Ausbildung der randseitig allseits geschlossenen Luftkammer 12 befestigt wird. Wesentlich ist, daß der Außenwandteil 8 und der Innenwandteil 9 stets im wesentlichen die gleichen Materialeigenschaften insbesondere hinsichtlich ihrer Festigkeit und ihres Dehnungsverhaltens aufweisen. Diese Bedingung ist selbstverständlich von vornherein bei dem dargestellten Ausführungsbeispiel erfüllt, bei dem die beiden Wandteile 8 und 9 durch Überlappung der Seitenränder der Sackwand 5 gebildet sind.Instead of the air outlet area defined by the double longitudinal seam, an air outlet area can be formed at another point of the bag 1 by attaching a separate material strip on the inside or outside of the bag wall 5 by longitudinal seams corresponding to the longitudinal seams 6 and 7 to form the air chamber 12, which is closed on all sides . It is essential that the outer wall part 8 and the inner wall part 9 always have essentially the same material properties, in particular with regard to their strength and their expansion behavior. This condition is of course fulfilled from the outset in the exemplary embodiment shown, in which the two wall parts 8 and 9 are formed by overlapping the side edges of the sack wall 5.

In Fig. 1 ist der Entlüftungsvorgang während der Befüllung des Sackes 1 schematisch veranschaulicht. Durch das Füllventil 4 wird ein hoch luftangereichertes Füllgut 14 (100 ltr./min.) entsprechend dem Pfeil 4a mit einem angenommenen Druck von 0,2 bar eingefüllt. Der Luftdurchlaß des Außenwandteils 8 ist hierbei so eingestellt, daß er z. B. 50 ltr./min. beträgt, während dabei der Luftdurchlaß des Innenwandteils 9 z. B. 100 ltr./min. beträgt. Hierdurch wird durch den Innenwandteil mehr Luft in die Luftkammer 12 eingespeist als durch den Außenwandteil 8 nach außen entweichen kann, wie es durch die Strömungspfeile 15 und 16 versinnbildlicht ist. Es erfolgt somit ein Rückströmen der überschüssigen Luft aus der Luftkammer 12 in das Sack innere, wie dies die Strömungspfeile 17 veranschaulichen. In Füllgut 14 selbst, das sich während des Füllungsvorgangs zum Boden 3 hin zunehmend verdichtet, entsteht ein Unterdruck, wie dies der Pfeil 18 verdeutlicht. Beispielsweise kann in dem angegnommenen Fall in dem unteren Bereich 19 des mehr und mehr mit dem Füllgut 14 befüllten Füllraums 20 der Druck 0,05 bar gegenüber dem Druck von 0,2 bar in der Luftkammer 12 betragen. Die auf diese Weise erzeugte Luftzirkulation gewährleistet eine wirksame Entlüftung des Sackes 1 während des gesamten Befüllungsvorganges. Etwaige störende Staubentweichungen könnten in an sich bekannter Weise durch Anbringung von Filtermaterialien an geeigneter stelle im Entlüftungsbereich verhindert werden.In Fig. 1, the venting process during the filling of the bag 1 is schematically illustrated. Through the filling valve 4, a highly air-enriched filling material 14 (100 l / min.) Is filled in according to the arrow 4a with an assumed pressure of 0.2 bar. The air passage of the outer wall part 8 is set so that it z. B. 50 ltr./min. is while the air passage of the inner wall part 9 z. B. 100 l / min. is. As a result, more air is fed into the air chamber 12 through the inner wall part than can escape to the outside through the outer wall part 8, as is symbolized by the flow arrows 15 and 16. The excess air thus flows back from the air chamber 12 into the sack inner, as illustrated by the flow arrows 17. In filling material 14 itself, which increasingly compresses towards the bottom 3 during the filling process, a negative pressure is created, as the arrow 18 shows. For example, in the assumed case in the lower region 19 of the filling space 20 which is filled more and more with the filling material 14, the pressure can be 0.05 bar compared to the pressure of 0.2 bar in the air chamber 12. The air circulation generated in this way ensures effective ventilation of the bag 1 during the entire filling process. Any disruptive dust escapes could be prevented in a manner known per se by attaching filter materials at a suitable point in the ventilation area.

Es versteht sich im übrigen, daß die Dimensionierung der Luftkammergröße, der Abstandhalter in der Luftkammer und des Luftdurchlasses der Wandteile 8,9 auf das zu verpackende Füllgut und die jeweiligen Absackbedingungen abzustimmen sind.It goes without saying that the dimensions of the air chamber size, the spacers in the air chamber and the air passage of the wall parts 8, 9 are to be coordinated with the contents to be packed and the respective bagging conditions.

Claims (7)

Flexibles Verpackungsbehältnis in Form eines Sackes oder Beutels aus Kunststoffolie oder dgl. luftundurchlässigem Material, mit einem Luftaustrittsbereich einer Sackwand, in dem das Sackmaterial als Außenwandteil mit Perforationen für einen Lurtdurchlaß aus dem Füllraum des Sackes versehen und das perforierte Sackmaterial innenseitig von einem luftdurchlässigen Innenwandteil abgedeckt ist, dadurch gekennzeichnet, daß der Innenwandteil (9) seinereits aus luftundurchlässsigem Material wie Kunststoffolie besteht und zu seiner luftdurchlässigen Ausbildung ebenfalls mit Perforationen (11) versehen ist, die jedoch eine Ausbildung und Anordnung für einen größeren Luftdurchlaß als die Perforationen (10) des Außenwandteils (8) im Luftaustrittsbereich der Sackwand (5) aufweisen, und daß der Innenwandteil (9) und der Außenwandteil (8) gemeinsam eine randseitig allseits geschlossene Luftkammer (12) begrenzen.Flexible packaging container in the form of a sack or bag made of plastic film or the like. Air-impermeable material, with an air outlet area of a sack wall, in which the sack material as the outer wall part is provided with perforations for a passage through the bag filling space and the perforated sack material is covered on the inside by an air-permeable inner wall part , characterized in that the inner wall part (9) consists of air-impermeable material such as plastic film and is also provided with perforations (11) for its air-permeable design, which, however, has a design and arrangement for a larger air passage than the perforations (10) of the outer wall part ( 8) in the air outlet area of the bag wall (5), and that the inner wall part (9) and the outer wall part (8) together delimit an air chamber (12) which is closed on all sides. Verpackungsbehältnis nach Anspruch 1, dadurch gekennzeichnet, daß der Luftdurchlaß des Innenwandteils (9) erheblich größer als der Luftdurchlaß des Außenwandteils (8) bemessen ist.Packaging container according to claim 1, characterized in that the air passage of the inner wall part (9) is dimensioned considerably larger than the air passage of the outer wall part (8). Verpackungsbehältnis nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Innenwandteil (9) und der Außenwandteil (8) durch in der Luftkammer angeordnete Abstandhalter (13) in einem gegenseitigen Abstand gehalten sind.Packaging container according to claim 1 or 2, characterized in that the inner wall part (9) and the outer wall part (8) are held at a mutual distance by spacers (13) arranged in the air chamber. Verpackungsbehältnis nach Anspruch 3, dadurch gekennzeichnet, daß die Abstandhalter (13) zwischen Innen (9)- und Außenwandteil (8) von Materialausprägungen gebildet sind, die von zumindest einem der beiden Wandteile (8,9) zur Luftkammer (12) hin gerichtet sind.Packaging container according to claim 3, characterized in that that the spacers (13) between the inner (9) and outer wall part (8) are formed by material characteristics which are directed towards the air chamber (12) from at least one of the two wall parts (8, 9). Verpackungsbehältnis nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Innenwandteil (9) und der Außenwandteil (8) im wesentlichen die gleichen Materialeigenschaften insbesondere hinsichtlich Festigkeit und Dehnungsverhalten aufweisen.Packaging container according to one of claims 1 to 4, characterized in that the inner wall part (9) and the outer wall part (8) have essentially the same material properties, in particular with regard to strength and elongation behavior. Verpackungsbehältnis nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Luftaustrittsbereich von einem sich zwischen Kopfende (2) und Boden (3) des Sackes (1) erstreckenden Längsstreifen der Sackwand (5) gebildet ist.Packaging container according to one of claims 1 to 5, characterized in that the air outlet area is formed by a longitudinal strip of the sack wall (5) extending between the head end (2) and the bottom (3) of the sack (1). Verpackungsbehältnis nach Anspruch 6, dadurch gekennzeichnet, daß der Längsstreifen an seinen beiden Längsrändern jeweils von einer den Innenwandteil (9) und den Außenwandteil (8) miteinander verbindenden Längsnaht (6,7) begrenzt ist.Packaging container according to claim 6, characterized in that the longitudinal strip is delimited at its two longitudinal edges by a longitudinal seam (6, 7) connecting the inner wall part (9) and the outer wall part (8).
EP90123842A 1990-02-28 1990-12-11 Flexible packaging container in the form of a bag or pouch, made from plastic film Expired - Lifetime EP0444261B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9002330U 1990-02-28
DE9002330U DE9002330U1 (en) 1990-02-28 1990-02-28

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EP0444261A1 true EP0444261A1 (en) 1991-09-04
EP0444261B1 EP0444261B1 (en) 1993-08-11

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DE (2) DE9002330U1 (en)
ES (1) ES2045734T3 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009077A1 (en) * 1993-09-30 1995-04-06 Sac O2 N.V. Film with determined permeability and use thereof
EP0778143A1 (en) * 1995-12-04 1997-06-11 Hewlett-Packard Company Ink cartridge adapters
EP0778146A1 (en) * 1995-12-04 1997-06-11 Hewlett-Packard Company Ink supply for an ink-jet printer
WO2005115856A1 (en) * 2004-05-27 2005-12-08 Rkw Ag Rheinische Kunststoffwerke Plastic bag featuring overpressure relief
WO2007006060A1 (en) * 2005-07-08 2007-01-18 Starlinger & Co Gesellschaft M.B.H. Ventilatable bag
WO2007115538A1 (en) 2006-04-12 2007-10-18 Nordfolien Gmbh Packaging for bulk materials, especially bag made of plastic film
WO2008058079A2 (en) * 2006-11-06 2008-05-15 Marko I.R.D.C. Plastic bag with improved air evacuation structure
EP2161210A1 (en) 2008-09-06 2010-03-10 Nordfolien GmbH Plastic film packing cases
WO2021094008A1 (en) 2019-11-12 2021-05-20 Rkw Se Laminate composite

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29807807U1 (en) * 1998-04-03 1999-08-12 Bischof & Klein Packaging material in the form of a sack or bag made of plastic film or the like. airtight material
HUP0900669A2 (en) 2009-10-26 2010-07-28 Zoltan Mandzsu Plastic packing bag with overpressure relief, packing method and system
DE202012006946U1 (en) * 2012-07-18 2012-08-22 Nordfolien Gmbh Packaging container with ventilation function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302859A (en) * 1964-12-21 1967-02-07 Bemis Co Inc Bag
GB1401713A (en) * 1973-01-17 1975-07-30 British Visqueen Ltd Plastics sack
EP0126816A1 (en) * 1983-05-25 1984-12-05 St. Regis Corporation Bags, particularly multiwall bags

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1212857B (en) * 1962-04-25 1966-03-17 Olin Mathieson Valve sack for receiving and packaging bulk goods
DE1908440A1 (en) * 1969-02-20 1970-09-10 Osthushenrich Kg Sack, especially valve sack
DE8127809U1 (en) * 1981-09-23 1982-01-07 Robert Bosch Gmbh, 7000 Stuttgart Bag pack for powdery filling goods
DE3447277A1 (en) * 1984-12-22 1986-06-26 Nordenia Kunststoffe Peter Mager KG, 2841 Steinfeld Self-ventilating sack made of plastic film

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302859A (en) * 1964-12-21 1967-02-07 Bemis Co Inc Bag
GB1401713A (en) * 1973-01-17 1975-07-30 British Visqueen Ltd Plastics sack
EP0126816A1 (en) * 1983-05-25 1984-12-05 St. Regis Corporation Bags, particularly multiwall bags

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009077A1 (en) * 1993-09-30 1995-04-06 Sac O2 N.V. Film with determined permeability and use thereof
US5856839A (en) * 1995-04-27 1999-01-05 Hewlett-Packard Company Ink supply having an integral pump
US5900896A (en) * 1995-04-27 1999-05-04 Hewlett-Packard Company Ink cartridge adapters
EP0778143A1 (en) * 1995-12-04 1997-06-11 Hewlett-Packard Company Ink cartridge adapters
EP0778146A1 (en) * 1995-12-04 1997-06-11 Hewlett-Packard Company Ink supply for an ink-jet printer
EA010143B1 (en) * 2004-05-27 2008-06-30 Ркв Аг Райнише Кунстштоффверке Plastic bag featuring overpressure relief
WO2005115856A1 (en) * 2004-05-27 2005-12-08 Rkw Ag Rheinische Kunststoffwerke Plastic bag featuring overpressure relief
EP1607339A1 (en) * 2004-05-27 2005-12-21 RKW AG Rheinische Kunststoffwerke Vented plastic bag
NO344897B1 (en) * 2004-05-27 2020-06-22 Heinemeier Juergen Plastic container comprehensive overpressure relief
CN100532215C (en) * 2004-05-27 2009-08-26 Rkw股份公司莱茵合成材料工厂 Plastic bag with overpressure relief
WO2007006060A1 (en) * 2005-07-08 2007-01-18 Starlinger & Co Gesellschaft M.B.H. Ventilatable bag
WO2007115538A1 (en) 2006-04-12 2007-10-18 Nordfolien Gmbh Packaging for bulk materials, especially bag made of plastic film
DE102006017229B4 (en) * 2006-04-12 2008-06-05 Nordfolien Gmbh Packaging for bulk goods, in particular bags of plastic film
WO2008058079A3 (en) * 2006-11-06 2008-07-31 Marko I R D C Plastic bag with improved air evacuation structure
WO2008058079A2 (en) * 2006-11-06 2008-05-15 Marko I.R.D.C. Plastic bag with improved air evacuation structure
EP2161210A1 (en) 2008-09-06 2010-03-10 Nordfolien GmbH Plastic film packing cases
DE102008046173A1 (en) 2008-09-06 2010-04-08 Nordfolien Gmbh Packaging container made of plastic film
WO2021094008A1 (en) 2019-11-12 2021-05-20 Rkw Se Laminate composite

Also Published As

Publication number Publication date
ES2045734T3 (en) 1994-01-16
DE59002323D1 (en) 1993-09-16
EP0444261B1 (en) 1993-08-11
DE9002330U1 (en) 1990-05-03

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