EP1950344A1 - Bag made from paper material - Google Patents

Bag made from paper material Download PDF

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Publication number
EP1950344A1
EP1950344A1 EP08001490A EP08001490A EP1950344A1 EP 1950344 A1 EP1950344 A1 EP 1950344A1 EP 08001490 A EP08001490 A EP 08001490A EP 08001490 A EP08001490 A EP 08001490A EP 1950344 A1 EP1950344 A1 EP 1950344A1
Authority
EP
European Patent Office
Prior art keywords
paper material
flame retardant
paper
concentration
salt
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
Application number
EP08001490A
Other languages
German (de)
French (fr)
Other versions
EP1950344B1 (en
Inventor
Hans-Joachim Wichmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mondi AG
Original Assignee
Mondi AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mondi AG filed Critical Mondi AG
Priority to PL08001490T priority Critical patent/PL1950344T3/en
Publication of EP1950344A1 publication Critical patent/EP1950344A1/en
Application granted granted Critical
Publication of EP1950344B1 publication Critical patent/EP1950344B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0002—Flame-resistant papers; (complex) compositions rendering paper fire-resistant
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/34—Ignifugeants
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • 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
    • B65D2213/00—Safety means
    • B65D2213/02—Means for preventing buil-up of electrostatic charges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
    • Y10T428/1307—Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]

Definitions

  • the invention relates to a bag with a wall formed at least predominantly of paper material, wherein the paper material is antistatic equipped by adding a conductive salt.
  • the invention further relates to the use of a flame retardant as an additive to paper material.
  • Sacks are usually made from paper material, such as kraft paper.
  • the wall of a bag consist of several layers of paper between which a plastic layer is often inserted as a moisture barrier.
  • Such bags serve as transport packaging for bulk materials of various kinds. Accordingly, such bags are also used in explosive environments. Therefore, it is important for many applications that the material of the bag walls is not subject to static electrical charges that discharge in the form of a spark and therefore could cause an explosion or the like.
  • flame retardant by the materials are mixed with a flame retardant.
  • the flame retardants have the function of chemically reacting at higher temperatures occurring so that any formed flames are stifled, for example by CO 2 is formed in the reaction of the flame retardant.
  • Another type of flame retardant releases water during the reaction, which hinders combustion.
  • Known flame retardant additives are halogen, phosphorus, boron or nitrogen compounds. Suitable examples are pyrophosphates (diphosphates).
  • the present invention has for its object to provide an antistatic bag with an additional benefit.
  • a bag of the type mentioned above is characterized in that the paper material is mixed with a flame retardant in such a concentration that the discharge resistance is ⁇ 10 9 ⁇ .
  • the bag according to the invention thus contains only one additive with which both the antistatic formation and a flame-retardant property are achieved.
  • the present invention is therefore based on the finding that a salt which can be used as a flame retardant in a sufficiently high concentration is also suitable for antistatic formation of the paper sack material. Accordingly, the paper bag according to the invention with the addition of a single additive is not only antistatic but also flame-retardant. The corresponding bag is therefore suitable, for example, for export to dry and warm climates, because it also - unlike the traditional paper sacks - flame-retardant properties.
  • the flame retardant is preferably an inorganic halogen, phosphorus or boron salt or a salt containing nitrogen compounds. Preference is given to the use of an alkali metal, alkaline earth metal or ammonium pyrophosphate.
  • the flame retardant is added at a concentration of preferably ⁇ 20% by weight, based on the paper material.
  • the core of the present invention thus lies in the use of a flame retardant as an additive to a paper material which serves at least as a predominant component for producing a bag wall, wherein the addition takes place in such a concentration that the discharge resistance of the paper material ⁇ 10 9 ⁇ , preferably ⁇ 10 8 ⁇ .

Abstract

The sack, mainly of a paper material, contains an additive of a conductive water-soluble salt so that it is anti-static, together with a non-flammable additive. The concentration is set to give a bleeder resistor of = 10 9>ohm. The non-flammable additive is an alkali- or earth alkali- or ammonium-pyrophosphate in a concentration of +- 20 wt.%.

Description

Die Erfindung betrifft einen Sack mit einer zumindest überwiegend aus Papiermaterial gebildeten Wandung, wobei das Papiermaterial durch Zugabe eines leitfähigen Salzes antistatisch ausgerüstet ist.The invention relates to a bag with a wall formed at least predominantly of paper material, wherein the paper material is antistatic equipped by adding a conductive salt.

Die Erfindung betrifft ferner die Verwendung eines Flammenschutzmittels als Zusatz zu Papiermaterial.The invention further relates to the use of a flame retardant as an additive to paper material.

Säcke werden üblicherweise aus Papiermaterial, beispielsweise Kraftpapier, hergestellt. Dabei kann die Wandung eines Sackes aus mehreren Papierlagen bestehen, zwischen denen häufig auch eine Kunststofflage als Feuchtigkeitssperre eingelegt ist.Sacks are usually made from paper material, such as kraft paper. In this case, the wall of a bag consist of several layers of paper between which a plastic layer is often inserted as a moisture barrier.

Derartige Säcke dienen als Transportverpackung für Schüttgüter unterschiedlichster Art. Demzufolge werden derartige Säcke auch in explosionsgefährdeten Umgebungen verwendet. Daher ist es für zahlreiche Anwendungsfälle wichtig, dass das Material der Sackwandungen keinen statischen elektrischen Aufladungen unterworfen ist, die sich in Form eines Funkens entladen und daher eine Explosion o. dgl. auslösen könnten.Such bags serve as transport packaging for bulk materials of various kinds. Accordingly, such bags are also used in explosive environments. Therefore, it is important for many applications that the material of the bag walls is not subject to static electrical charges that discharge in the form of a spark and therefore could cause an explosion or the like.

Es ist daher bekannt, das Papiermaterial von Sackwandungen antistatisch auszurüsten. Von einer antistatischen Ausrüstung spricht man dann, wenn der Ableitwiderstand des Papiermaterials < 109 Ω ist. Die antistatische Ausrüstung eines derartigen Sackmaterials lässt sich in bekannter Weise durch die Zugabe von geeigneten leitfähigen Salzen herstellen, die leicht dissoziieren und neutral sein sollten, wie beispielsweise Natriumsulfat.It is therefore known to provide the paper material of bag walls antistatic. An anti-static equipment is used when the discharge resistance of the paper material is <10 9 Ω. The antistatic finish of such a sack material can be prepared in a known manner by the addition of suitable conductive salts which should be readily dissociated and neutral, such as sodium sulfate.

Es ist bekannt, Zellulosematerialien, insbesondere Holz und Textilien, flammhemmend auszubilden, indem die Materialien mit einem Flammschutzmittel versetzt werden. Die Flammschutzmittel haben die Funktion, bei auftretenden höheren Temperaturen chemisch so zu reagieren, dass etwa gebildete Flammen erstickt werden, beispielsweise indem bei der Reaktion des Flammschutzmittels CO2 entsteht. Eine andere Art von Flammschutzmittel setzt bei der Reaktion Wasser frei, das die Verbrennung behindert. Bekannte flammhemmende Zusatzstoffe sind Halogen-, Phosphor-, Bor- oder Stickstoffverbindungen. Geeignet sind beispielsweise Pyrophosphate (Diphosphate).It is known to form cellulosic materials, especially wood and textiles, flame retardant by the materials are mixed with a flame retardant. The flame retardants have the function of chemically reacting at higher temperatures occurring so that any formed flames are stifled, for example by CO 2 is formed in the reaction of the flame retardant. Another type of flame retardant releases water during the reaction, which hinders combustion. Known flame retardant additives are halogen, phosphorus, boron or nitrogen compounds. Suitable examples are pyrophosphates (diphosphates).

Es ist nicht üblich, Sackmaterialien mit flammhemmenden Zusätzen zu versehen, weil Papiersäcke in gemäßigten Klimazonen eine ausreichende Restfeuchte besitzen, durch die eine Entflammung von Haus aus erschwert ist. Die intrinsische flammhemmende Eigenschaft von zu einem Sack verarbeiteten Papiermaterialien geht nur dann verloren, wenn der Sack längere Zeit in sehr trockenen und warmen Umgebungsbedingungen gelagert wird.It is not customary to provide bag materials with flame-retardant additives, because paper sacks in temperate climates have sufficient residual moisture that makes it difficult to fire from home. The intrinsic flame retardant property of sacked paper materials is only lost if the sack is stored for extended periods of time in very dry and warm ambient conditions.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen antistatisch ausgerüsteten Sack mit einem Zusatznutzen zu versehen.The present invention has for its object to provide an antistatic bag with an additional benefit.

Zur Lösung dieser Aufgabe ist erfindungsgemäß ein Sack der eingangs erwähnten Art dadurch gekennzeichnet, dass das Papiermaterial mit einem Flammschutzmittel in einer solchen Konzentration versetzt ist, dass der Ableitwiderstand < 109Ω ist.To achieve this object, a bag of the type mentioned above is characterized in that the paper material is mixed with a flame retardant in such a concentration that the discharge resistance is <10 9 Ω.

Der erfindungsgemäße Sack enthält somit lediglich ein Additiv, mit dem sowohl die antistatische Ausbildung als auch eine flammhemmende Eigenschaft erzielt wird.The bag according to the invention thus contains only one additive with which both the antistatic formation and a flame-retardant property are achieved.

Dies wird dadurch erreicht, dass für die antistatische Ausbildung des Sackmaterials nicht ein herkömmliches Salz verwendet wird, sondern ein Additiv, das als Flammschutzmittel geeignet ist. Dieses Additiv muss allerdings in einer hohen Konzentration zugegeben werden, die im Allgemeinen höher liegt als die übliche Zugabekonzentration für die üblicherweise verwendeten Salze zur Ausbildung eines antistatischen Sackes. Demgemäß ist bei der Zugabe des Flammschutzmittels darauf zu achten, dass die Konzentration so hoch ist, dass der Ableitwiderstand < 109 Ω ist. Erfindungsgemäß lässt sich ein Ableitwiderstand von ≤ 108 Ω erreichen.This is achieved by using not a conventional salt for the antistatic formation of the sack material, but an additive which is suitable as a flame retardant. However, this additive must be added in a high concentration, which is generally higher than the usual addition concentration for the commonly used salts to form an antistatic bag. Accordingly, care should be taken when adding the flame retardant that the concentration is so high that the leakage resistance is <10 9 Ω. According to the invention, a leakage resistance of ≦ 10 8 Ω can be achieved.

Die vorliegende Erfindung geht daher von der Erkenntnis aus, dass ein als Flammschutzmittel verwendbares Salz in einer genügend hohen Konzentration auch zur antistatischen Ausbildung des Papiersackmaterials geeignet ist. Demgemäß ist der erfindungsgemäße Papiersack mit der Zugabe eines einzigen Additivs nicht nur antistatisch sondern auch flammhemmend ausgerüstet. Der entsprechende Sack ist daher beispielsweise für den Export in trockene und warme Klimazonen geeignet, weil er auch dort - anders als die herkömmlichen Papiersäcke - flammhemmende Eigenschaften aufweist.The present invention is therefore based on the finding that a salt which can be used as a flame retardant in a sufficiently high concentration is also suitable for antistatic formation of the paper sack material. Accordingly, the paper bag according to the invention with the addition of a single additive is not only antistatic but also flame-retardant. The corresponding bag is therefore suitable, for example, for export to dry and warm climates, because it also - unlike the traditional paper sacks - flame-retardant properties.

Das Flammschutzmittel ist vorzugsweise ein anorganisches Halogen-, Phosphor- oder Borsalz oder ein Stickstoffverbindungen enthaltendes Salz. Bevorzugt ist die Verwendung eines Alkali-, Erdalkali- oder Ammoniumpyrophosphats.The flame retardant is preferably an inorganic halogen, phosphorus or boron salt or a salt containing nitrogen compounds. Preference is given to the use of an alkali metal, alkaline earth metal or ammonium pyrophosphate.

Die Zugabe des Flammschutzmittels erfolgt mit einer Konzentration von vorzugsweise ≥ 20 Gew.%, bezogen auf das Papiermaterial.The flame retardant is added at a concentration of preferably ≥ 20% by weight, based on the paper material.

Der Kern der vorliegenden Erfindung liegt somit in der Verwendung eines Flammschutzmittels als Zusatz zu einem Papiermaterial, das zumindest als überwiegende Komponente zur Herstellung einer Sackwandung dient, wobei die Zugabe in einer solchen Konzentration erfolgt, dass der Ableitwiderstand des Papiermaterials < 109 Ω, vorzugsweise ≤ 108 Ω beträgt.The core of the present invention thus lies in the use of a flame retardant as an additive to a paper material which serves at least as a predominant component for producing a bag wall, wherein the addition takes place in such a concentration that the discharge resistance of the paper material <10 9 Ω, preferably ≤ 10 8 Ω.

Die Zugabe des Flammschutzmittels in der erfindungsgemäßen Konzentration erfordert eine gewisse Sorgfalt, da das üblicherweise geleimte Papiermaterial die wässrige Lösung des Salzes nur zögernd aufnimmt.The addition of the flame retardant in the concentration of the invention requires some care, since the usually sized paper material absorbs the aqueous solution of the salt only hesitant.

Claims (6)

Sack mit einer zumindest überwiegend aus Papiermaterial gebildeten Wandung, wobei das Papiermaterial durch Zugabe eines leitfähigen Salzes antistatisch ausgerüstet ist, dadurch gekennzeichnet, dass das Papiermaterial mit einem Flammschutzmittel in einer solchen Konzentration versetzt ist, dass der Ableitwiderstand < 109 Ω ist.Sack with a wall formed at least predominantly of paper material, wherein the paper material is antistatic equipped by adding a conductive salt, characterized in that the paper material is mixed with a flame retardant in such a concentration that the bleeder is <10 9 Ω. Sack nach Anspruch 1, dadurch gekennzeichnet, dass das Flammschutzmittel ein organisches Halogen-, Phosphor-, oder Borsalz oder ein Stickstoffverbindungen enthaltendes Salz ist.Sack according to claim 1, characterized in that the flame retardant is an organic halogen, phosphorus, or boron salt or a nitrogen-containing salt. Sack nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Salz wasserlöslich ist.Sack according to claim 1 or 2, characterized in that the salt is water-soluble. Papiersack nach Anspruch 2 und 3, dadurch gekennzeichnet, dass das Flammschutzmittel ein Alkali-, Erdalkali- oder Ammoniumpyrophosphat ist.Paper bag according to claim 2 and 3, characterized in that the flame retardant is an alkali, alkaline earth or ammonium pyrophosphate. Sack nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Papiermaterial mit ≥ 20 Gew.% Flammschutzmittel versetzt ist.Sack according to one of claims 1 to 4, characterized in that the paper material with ≥ 20 wt.% Flame retardant is added. Verwendung eines Flammschutzmittels als Zusatz zu Papiermaterial, dadurch gekennzeichnet, dass es zu einem Papiermaterial, das zumindest als überwiegende Komponente zur Herstellung einer Sackwandung dient, in einer solchen Konzentration zugegeben wird, dass der Ableitwiderstand des Papiermaterials < 109Ω beträgt.Use of a flame retardant as an additive to paper material, characterized in that it is added to a paper material which serves at least as the predominant component for producing a bag wall in such a concentration that the discharge resistance of the paper material is <10 9 Ω.
EP08001490A 2007-01-29 2008-01-28 Bag made from paper material Active EP1950344B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08001490T PL1950344T3 (en) 2007-01-29 2008-01-28 Bag made from paper material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007005218A DE102007005218B4 (en) 2007-01-29 2007-01-29 Sack of paper material

Publications (2)

Publication Number Publication Date
EP1950344A1 true EP1950344A1 (en) 2008-07-30
EP1950344B1 EP1950344B1 (en) 2012-04-04

Family

ID=39312989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08001490A Active EP1950344B1 (en) 2007-01-29 2008-01-28 Bag made from paper material

Country Status (6)

Country Link
US (1) US20080182050A1 (en)
EP (1) EP1950344B1 (en)
AT (1) ATE552380T1 (en)
CA (1) CA2620920A1 (en)
DE (1) DE102007005218B4 (en)
PL (1) PL1950344T3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH321212A (en) 1953-08-26 1957-04-30 Ciba Geigy Process for making non-textile cellulosic material flame resistant, such as wood and paper
US3770577A (en) 1969-09-23 1973-11-06 Humphrey Chem Corp Fire retardant paper and paper board
GB1373700A (en) 1973-06-06 1974-11-13 Cooke Ltd Henry Flame-proofing of paper
US4797010A (en) * 1987-09-22 1989-01-10 Nabisco Brands, Inc. Reheatable, resealable package for fried food

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286710A (en) * 1979-11-28 1981-09-01 Higgins Janet D Christmas candle package
US6156240A (en) * 1997-07-23 2000-12-05 Blount; David H. Flame retardant polynitrogen containing salt of boron compound
DE102004058842A1 (en) * 2004-12-06 2006-06-08 Franz Hubert Lott Gmbh & Co. Kg Feinpappenwerk Und Kunststoffverarbeitung Non-flammable or flame-retardant flat paper or board material and method for its production

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH321212A (en) 1953-08-26 1957-04-30 Ciba Geigy Process for making non-textile cellulosic material flame resistant, such as wood and paper
US3770577A (en) 1969-09-23 1973-11-06 Humphrey Chem Corp Fire retardant paper and paper board
GB1373700A (en) 1973-06-06 1974-11-13 Cooke Ltd Henry Flame-proofing of paper
US4797010A (en) * 1987-09-22 1989-01-10 Nabisco Brands, Inc. Reheatable, resealable package for fried food

Also Published As

Publication number Publication date
ATE552380T1 (en) 2012-04-15
DE102007005218B4 (en) 2010-09-30
CA2620920A1 (en) 2008-07-29
EP1950344B1 (en) 2012-04-04
US20080182050A1 (en) 2008-07-31
PL1950344T3 (en) 2012-09-28
DE102007005218A1 (en) 2008-08-07

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