EP1680547A2 - Nouveau materiau a base de papier, carton ou carton-pate - Google Patents

Nouveau materiau a base de papier, carton ou carton-pate

Info

Publication number
EP1680547A2
EP1680547A2 EP04796931A EP04796931A EP1680547A2 EP 1680547 A2 EP1680547 A2 EP 1680547A2 EP 04796931 A EP04796931 A EP 04796931A EP 04796931 A EP04796931 A EP 04796931A EP 1680547 A2 EP1680547 A2 EP 1680547A2
Authority
EP
European Patent Office
Prior art keywords
borax
weight
cardboard
paper
solution
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.)
Withdrawn
Application number
EP04796931A
Other languages
German (de)
English (en)
Inventor
Wolfgang Christ
Klaus Schmalfuss
Hans-Joachim Knapp
Margaretha Rothwangl
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.)
Spezialpappenfabrik Rosegg Betriebs GmbH
Original Assignee
Spezialpappenfabrik Rosegg Betriebs GmbH
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 Spezialpappenfabrik Rosegg Betriebs GmbH filed Critical Spezialpappenfabrik Rosegg Betriebs GmbH
Publication of EP1680547A2 publication Critical patent/EP1680547A2/fr
Withdrawn legal-status Critical Current

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
    • 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
    • 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

Definitions

  • the invention relates to a new paper, cardboard or cardboard material according to the preamble of claim 1 or 10 or a method for producing this new material according to the preamble of claim 11.
  • Paper, cardboard or cardboard materials are used in particular as building materials used in the construction industry in a variety of forms, for example as cladding, insulation or insulation material.
  • building material classes B2 and B3 according to DIN standard 4102, these materials cannot be used well and advantageously in all areas.
  • Building materials class B2 for example, can be used to classify building materials that can be ignited by ignition sources and that continue to burn by themselves depending on the ambient conditions.
  • Building materials class B3 includes building materials that can be ignited with small sources of ignition and that continue to burn with increasing speed without the addition of heat. Building materials of this type pose a high fire risk and are usually not allowed to be used when building structures.
  • cardboard or cardboard materials In order to improve the flame or fire behavior of paper, cardboard or cardboard materials, such materials are treated or impregnated with various flame retardants. These flame retardants work according to different principles, for example by preventing the inflammation of the substances to be protected, by hindering the ignition or by complicating the combustion. Some flame retardants work in such a way that they increase the natural ability of the wood to shield itself from fire by forming an incombustible layer of charcoal.
  • flame retardants for example, emit flame-suffocating gases when they burn, which prevent oxygen from entering the combustible substance. Still other flame retardants expand to a foam when heated and form a fine-pored, insulating cushion. Combinations of these effects are also possible. All these flame retardants have in common that they are subsequently applied in various ways to the more or less finished product, for example by spraying, dipping, brushing or the like. For example, there are fire retardant dispersions for wood, flame retardants for spraying paper or Synthetic fibers, flame retardants in the form of paints or coatings etc. The goal of making these building materials or materials according to building material class B1 flame-retardant or flame-retardant is usually achieved by these measures.
  • a building material is considered flame-retardant or flammable if it passes the so-called Schlyter test, ie if the material does not continue to burn automatically after the fire has gone out.
  • borax in particular borax decahydrate or other boric acid salts or derivatives
  • Inorganic boron compounds are generally known as good flame retardants.
  • the mineral borax decahydrate (Tinkal) or disodium tetraborate decahydrate Na 2 B 4 O 7 * 10H 2 O [CAS 1303-96-4] is mostly present in nature. This borax ore is usually mined, crushed, treated with water and then borax is crystallized out under vacuum.
  • borax pentahydrate at temperatures above 70 ° C or borax decahydrate at lower temperatures.
  • the solubility of borax in water is relatively low. If a material containing borax or boric acid is heated or burned, the borax melts and forms a glass-like coating over the fibers of the material. In addition, the inherent crystal water is released as the temperature rises. For this reason, boraxic acid and boric acid or boron compounds are generally well suited as flame retardants for wood products, cellulose or cotton products. For example, paper materials or various materials are known from the literature
  • Fibrous materials such as Spray or impregnate cellulose, cellulose, linen etc. with various flame retardant solutions. Cellulose fibers treated in this way are blown into the cavities of partition walls, for example, as insulation material.
  • a major disadvantage of the above-mentioned type of spraying or dipping is a major disadvantage of the above-mentioned type of spraying or dipping
  • JP 2003 171898 A discloses a process for producing a paper material which contains 25-80% vegetable fibers and 20-75% by weight borax. For this purpose, 10-50% by weight of borax are dissolved in glycerin in order to obtain a borax-glycerin solution.
  • glycerol solution is then dissolved in water in order to again obtain a borax solution with 10-50% by weight borax and 5% by weight glycerin.
  • the paper is then impregnated with this solution and dried.
  • WO 94/24359 A describes a method for producing a fibrous or flaky, fire-resistant insulation material.
  • the base material especially newsprint, is first dry milled and fiberized.
  • flame retardant salts such as borax
  • a part of the flame retardant in anhydride form is added before the defibering and part of the fire retardant in hydrate form after the degassing.
  • No. 4,349,413 A describes a method for producing a fibrous refractory cellulose insulation material for blowing into cavities.
  • cellulose material is first pressurized with steam and heated to soften the material.
  • a flame retardant such as borax, boric acid or a borate is added directly and mixed.
  • the flame retardant can be added in a dry, powdery state or in a concentrated aqueous solution.
  • the fibrous pulp material obtained in this way is then dried and can be blown into cavities in this form for isolation.
  • the aim of the invention is to avoid the disadvantages mentioned above and to propose a paper or cardboard or cardboard material of the type mentioned at the outset, which is characterized by improved flame or fire behavior.
  • an efficient method for producing such a material is proposed. According to the invention, this is achieved with a material of the type mentioned at the outset by the characterizing features of claims 1 and 10 and in a method of the type mentioned at the outset with the characterizing features of claim 11.
  • the borax cellulose associates form an essential factor in the
  • borax cellulose fibers Improvement of the flame and fire behavior, since practically all fibers are completely protected by borax cellulose fibers.
  • These features have the advantage of further improving the flame and fire behavior.
  • the borax or the borax crystals melt and form a glass-like coating over the fibers of the material.
  • the features of claim 2 can be formed.
  • the properties of the material can be optimized for certain areas of application.
  • An optimal composition of the material matrix is advantageously designed according to the features of claim 3.
  • the fibrous materials from which the material is formed are designed according to the features of claim 4.
  • the features of the material designed according to claim 5 give it excellent stability properties and allow flexible adjustment of the material thickness.
  • the features formed according to the features of claim 6 allow the material to be divided into the building material classes A2 and / or B1 and thus allow the use of this material in special areas.
  • the specified specific weight of the material according to the features of claim 7 allows the use of this material in areas in which light, yet stable, materials are required.
  • a price reduction can be achieved through the features of claim 9.
  • the process according to the invention for producing the new paper, cardboard or cardboard material with improved flame or fire behavior is advantageously carried out according to the principle of claim 11, the borax solution being brought into contact with the cellulose fibers at the start of the process and not only, as is known from the prior art, a finished molded end product is treated with it.
  • This has a significantly better absorption capacity of the borax in the This results in cellulose fibers or the fibrous materials and, accordingly, a more uniform or homogeneous property profile of the material with a simultaneous increased flame and fire protection effect in the entire material.
  • a certain reduction in the residual water content of the fibrous material is ensured by the dry mixing of solid, in particular powdery, or original borax with the fibrous material before the addition of the borax solution.
  • a technically simple step is the addition of solid or original borax at the same time as the addition of the borax solution.
  • the addition of the original borax ensures that the borax solution is always saturated if possible. Any dilutions due to the residual water content of the fiber material are compensated for by additional dissolution of the original borax, or more borax can dissolve if the temperature increases locally or generally during the course of the process. This leads to an increase in the borax concentration and consequently even more borax can be absorbed by the fibers.
  • the features of claim 12 ensure that the resulting suspension has an optimal concentration for further processing.
  • the features of claim 13 ensure that the correct concentration is set as a function of the next method steps, in particular on the paper machine.
  • An optimal and energy-efficient temperature range for the method is provided in the features of claim 16.
  • the final processing of the material is advantageously carried out according to the
  • the features of claim 21 enable a selection of various borax derivatives according to the requirement profile of the material, wherein most of the water of crystallization is additionally released by the use of borax decahydrate when heated, whereby an improvement in the flame and fire behavior is achieved.
  • the residual water content of the fibrous materials should, in order not to have negative effects on the concentration of the borax solution or on the absorption behavior of the fibrous materials, be formed according to the advantageous embodiments according to claim 22, since water already embedded or bound in the fibers is difficult or not can be completely displaced by borax solution.
  • Cardboard materials are mainly used for the manufacture of paper, cardboard or cardboard, the usual fibrous materials or pulp materials.
  • primary fiber materials can be used, such as wood pulp obtained by mechanical digestion from vegetable raw materials or pulp obtained by chemical digestion.
  • Secondary fiber materials can also be used, secondary fiber materials, in particular recycled fiber materials obtained from waste paper or rags. Fibers are obtained, for example, from newspaper, packaging material, leaves, wood chips, cork, jute, linseed fibers, hemp, straw, reeds, coconut fiber or hay. It should be noted that the maximum residual water content in these fibers should not exceed 30% by weight and in particular should be less than 15% by weight.
  • the fibrous materials are brought together with borax solution in a container, in particular in a pulper or mixer.
  • borax decahydrate in particular is used to prepare the borax solution.
  • the solubility of borax decahydrate in water is strongly temperature-dependent and ranges from 20 g / kg water at 0 ° C to 170 g / kg water at 100 ° C, with about 50 g borax / kg water dissolving at room temperature.
  • borax especially commercially available Borax decahydrate understood.
  • borax penthydrate, anhydrous borax anhydrate and / or other borax derivatives The saturation of the borax solution should be between 60% and 100%, in particular a fully saturated borax solution should be used.
  • original borax that is to say naturally crystallized or commercially available borax
  • borax solution, the fibrous material and optionally the original borax are then mixed or homogenized or ground to form a mush-like suspension, in particular intimately.
  • Another possibility is to add the fibrous material and the original borax in the pulper before adding the borax solution in particular with 3 to 15% by weight, preferably 5 to 12% by weight, in particular 7 to 9% by weight, based on the weight of the fiber material used. to combine dry to mix, to homogenize or to grind, and only then to introduce the borax solution and again to homogenize to form the slurry-like suspension.
  • This second possibility is particularly advantageous in that the residual water or residual moisture contained in the fiber material can be better reduced or removed.
  • the addition of the original borax fulfills, among other things, the purpose that when using or adding saturated borax solution, this borax solution also remains 100% saturated, if possible, throughout the entire process.
  • dilutions caused by the residual moisture of the waste paper are compensated for by partially dissolving the original borax.
  • additional borax can also go into solution and the borax concentration can thereby be increased, which leads to even more, in particular in maximum amount, borax in the cellulose fibers can store.
  • a certain proportion of the original borax does not dissolve during the process and is present as original borax in the end product, where it has a significant share in the improved fire behavior of the material.
  • borax solution is added to the fibrous material or to the mixture of fibrous material and original borax that the proportion of the fibrous material in the total weight of the suspension or the solid mass fraction is between 5 and 25% by weight, in particular 8 to 18% by weight.
  • the fibers or the very absorbent fiber network is sucked in with saturated borax solution or almost completely penetrated or soaked with borax solution. For this reason it is important that the residual moisture or the residual water content of the fibers is kept as low as possible, since water already bound in the fiber material can only be displaced with difficulty by saturated borax solution.
  • the temperature rises automatically due to the mixing or stirring, ie there is no additional heating.
  • the temperature is in particular between 13 to 55 ° C., in particular between 20 to 35 ° C.
  • the further process steps essentially correspond to the processing steps customary for the manufacture of paper, cardboard or cardboard. In this way, particularly in a reject sorter, coarse impurities such as metal or plastic parts are removed and, if necessary, the suspension is subjected to an additional fine sorting in a further step.
  • the waste paper can also be removed in a de-inking process, in particular by flotation or washing processes, dyes, fillers or the like.
  • the suspension is comminuted and homogenized again in a refiner, whereby in particular the length of the cellulose fibers can be adjusted. Fiber lengths of less than 2.5 mm have proven to be ideal.
  • the suspension is diluted with borax solution, a borax solution in particular having the same concentration as before being used in the pulper. The dilution should, depending on the requirements of the paper machine, except for one Solids mass fraction in the suspension of 0.1 to 3% by weight, in particular 0.3 to 1% by weight.
  • This dilution can take place in two stages, with the suspension being diluted to a solid mass fraction of 0.3 to 7% by weight, in particular 4 to 5% by weight, in a first dilution step, which takes place in particular in a mixing chest.
  • a first dilution step which takes place in particular in a mixing chest.
  • various paper auxiliaries or additives or additives in particular paints, binders, in particular latex or glue, fillers or other paper auxiliaries customary in paper production, to be introduced or mixed in the usual amounts in the pulp present in this way.
  • the final degree of dilution is finally diluted or adjusted.
  • the temperature should not exceed the temperature range mentioned above.
  • the distribution of the borax crystals should be adjusted or maintained as evenly as possible, for example by stirring.
  • the stock produced by the dilution is thickened or reduced evenly by partially squeezing or suctioning off the borax solution, preferably to a residual borax solution content of 45 to 85% by weight, in particular from 60 to 70% by weight.
  • This raw product or the moist material is then dried.
  • the dissolved borax in the crude product crystallizes at least partially and, as will be described in more detail later, borax-cellulose associates and optionally intermediate borax form.
  • the borax solution squeezed here from the diluted whole substance can, if appropriate after cleaning and / or working up, be returned to the pulper or recycled or be used again in a dilution step. Drying is most efficiently done by machine drying, followed by air drying. Machine drying runs particularly efficiently in a multi-stage, in particular a three-stage, process, the temperatures in particular being increased from stage to stage in the course of this drying process.
  • the temperature range is between 90 and 150 ° C, in particular between 95 and 145 ° C, preferably between 100 and 140 ° C, with a temperature of about 145 ° C the risk of blistering increases sharply.
  • the residual borax solution content is reduced in particular to a value between 30 and 60% by weight.
  • the residual borax solution content should be 2 to 15% by weight, preferably 3 to 10% by weight, in particular 4 to 6% by weight , be lowered.
  • the raw product dried in this way can now be fed to a smoothing unit or a calender and then reaches further processing, ie for cutting or finishing, etc.
  • a material obtained by such a process contains in the form of a typical cross-linked or matted matrix at least 50% by weight of cellulose and at least 5% by weight of borax, a composition of 70 to 95% by weight of cellulose and 5 to 30% by weight of borax being particularly advantageous.
  • Various paper auxiliaries can also be added in the usual amounts. Due to the fact that during the process, in particular in the pulper, the fibers soak or soak in saturated borax solution, so-called borax-cellulose associates 1 are formed during the drying process by crystallization, as can be seen from the drawing.
  • borax-cellulose associates 1 are essentially penetrated by borax crystals or structures, in particular completely, cellulose fibers or cellulose fibers or a cellulose fiber network that are / are intimately and densely matted with borax crystals or structures or cellulose fibers in the borax crystals or structures are incorporated or attached or which are surrounded by a borax crystal lattice.
  • borax-cellulose associates 1 are in particular between 0.05 and 5 mm in size.
  • fiber-independent borax 2 can also be present in the matrix of the material, this fiber-independent borax 2 not being associated with the fibers, ie the fiber-independent borax 2 does not penetrate the cellulose fibers, as is the case with the borax-cellulose associates 1.
  • This fiber-independent borax 2 is composed, on the one hand, of the intermediate borax 4 crystallized during the production process, in particular during the drying process, ie in a relatively short time and therefore small-crystalline, and / or of the original borax 3 optionally added in the pulper.
  • the fiber-independent borax 2 in particular has a particle size between 0.01 and 3 mm on, large crystals of approx. 3 mm being present only in small amounts of up to 0.5%, in particular 0.1%, based on the total number.
  • the size of the original borax crystals 3 can also change in the course of the method through grinding, comminution or dissolving processes.
  • the borax-cellulose associates 1 are in the matrix of the material in particular in a range from 60 to 100% by volume, in particular 80 to 97% by volume, preferably 85 to 95% by volume, based on the volume of solids, ie on the volume, for example with strong compression, is taken up by the solid constituents of the matrix, formed or available.
  • the fiber-independent borax 2 is present in particular in a range between 0 to 40% by volume, in particular 3 to 20% by volume, preferably 5 to 10% by volume, based on the solids volume.
  • the cellulose fibers are preferably formed from secondary fibers, in particular from waste paper, and have a fiber length of up to in particular 5 mm, preferably from 0.2 to 2.5 mm.
  • the material After processing on the paper machine, in particular due to the application to a screen or screen belt or to a screen roller, the material can have a layer-like structure or can be constructed from a plurality of essentially identical layers lying parallel to one another or one above the other.
  • the thickness of the end product for example paper, cardboard or cardboard
  • the specific weight of the material is advantageously between 0.3 to 2.0 g / cm 3 , in particular 0.6 to 1.2 g / cm 3 .
  • the finished material is preferably in compact form, in particular in plates or sheets with a thickness of in particular 1 to 5 mm.
  • the material is non-combustible and / or non-flammable or it is to be divided into building material classes A2 and / or B1 in particular according to DIN 4102.
  • the material can therefore be free of glycerin, activated carbon, graphite, Sassolin etc.
  • the following examples illustrate the invention. The process was carried out using the parameters customary in the manufacture of paper, cardboard or cardboard, such as temperature, pH, etc.
  • borax % By weight of pulp and about 15% by weight of borax.
  • the matrix of this material also contains commercially available or original borax 3 with approx. 7
  • Example 2 - Mix 100 kg of pulp with 900 kg of saturated borax solution in the pulper at room temperature and homogenize - Dilute the suspension with 9000 kg of saturated borax solution and apply it to the paper machine - Squeeze or suck off approx. 9700 kg of borax solution to a content of approx 67% by weight borax solution - drying to a content of approx. 5% by weight borax solution or a residual moisture of approx. 5% A paper, cardboard or cardboard material with approx. 86% by weight cellulose and approx. 9% by weight borax is obtained by this process. In a fire test with a Bunsen burner pointing to the edge, particularly in a Schlytertest, the material proves to be not easily flammable and non-flammable.
  • Example 3 - Mixing 100 kg of pulp with 900 kg of 70% saturated borax solution in the pulper at room temperature and homogenizing - Dilution of the suspension with 9000 kg to 70% saturated borax solution and application to the paper machine - Squeezing or suctioning off approx. 9700 kg Borax solution to a content of approx. 67% by weight Borax solution Drying to a content of approx. 5% by weight Borax solution or a residual moisture of approx. 5%
  • a paper, cardboard or cardboard material with approx. 89% by weight pulp and approx. 6% by weight borax is obtained by this process.
  • the material has been shown to be flame retardant in a fire test with a Bunsen burner pointing to the edge, particularly in a Schlytertest.

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  • Paper (AREA)

Abstract

L'invention concerne un nouveau matériau à base de papier, carton ou carton-pâte, présentant une résistance à la flamme et au feu améliorée, ledit matériau se présentant sous la forme d'une matrice à enchevêtrement ou entrelacement, contenant au moins 50 % en poids de cellulose et au moins 5 % en poids de borax. Cette matrice comprend des complexes borax-cellulose (1) constitués de fibres de cellulose, sur ou dans lesquelles se trouvent des cristaux de borax. Du borax (2), non associé aux fibres, est en outre présent dans la matrice, ledit borax (2) contenant du borax sous sa forme d'origine, sous une forme cristallisée de manière naturelle ou sous sa forme commerciale, ou des cristaux de borax (3) et/ou du borax (4) intermédiaire, ayant subi une cristallisation au cours du procédé de production.
EP04796931A 2003-11-03 2004-11-03 Nouveau materiau a base de papier, carton ou carton-pate Withdrawn EP1680547A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT17432003A AT413549B (de) 2003-11-03 2003-11-03 Neuer papier-, karton- bzw. pappewerkstoff
PCT/AT2004/000386 WO2005042840A2 (fr) 2003-11-03 2004-11-03 Nouveau materiau a base de papier, carton ou carton-pate

Publications (1)

Publication Number Publication Date
EP1680547A2 true EP1680547A2 (fr) 2006-07-19

Family

ID=34528584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04796931A Withdrawn EP1680547A2 (fr) 2003-11-03 2004-11-03 Nouveau materiau a base de papier, carton ou carton-pate

Country Status (3)

Country Link
EP (1) EP1680547A2 (fr)
AT (1) AT413549B (fr)
WO (1) WO2005042840A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010053402A1 (de) * 2010-12-02 2012-06-06 Willy Heckers Vorrichtung und Verfahren zur Herstellung von flächigen Materialbahnen aus Faserstoffen organischer und/oder anorganischer Herkunft
EP2729552B1 (fr) 2011-07-06 2018-03-21 National Research Council of Canada Matière cellulosique résistante au feu
ES2668774T3 (es) * 2015-07-20 2018-05-22 Mayr-Melnhof Karton Ag Material de cartón multicapa y método para la fabricación de un material de cartón multicapa

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0863962B1 (fr) 1995-11-30 2000-03-08 Wolfgang Christ Materiau de revetement thermo-isolant

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370249A (en) * 1978-11-15 1983-01-25 Jack E. White Fire-retardant cellulose insulation and method of production
US4349413A (en) * 1979-07-25 1982-09-14 The Black Clawson Company Cellulosic fiber insulation and process of preparation
FI95401C (fi) * 1993-04-15 1996-01-25 Ekovilla Oy Menetelmä ainakin oleellisesti palamattoman tuotteen valmistamiseksi kuituraaka-aineesta sekä menetelmällä valmistettu lämmöneristysmateriaali ja asfaltin lisäaine
DE19516186A1 (de) * 1995-05-05 1996-11-07 Willoc Holding B V Dämmaterial aus Naturprodukten und Herstellungsverfahren dafür
RU2096368C1 (ru) * 1996-04-05 1997-11-20 Государственное предприятие "Промотходы" Сырьевая смесь для изготовления теплоизоляционного материала
JP2003171898A (ja) * 2001-12-06 2003-06-20 Plusto:Kk 難燃紙
DE60333841D1 (de) * 2002-09-17 2010-09-30 Int Paper Co Papiere mit borhaltiger verbindung und verfahren zu ihrer herstellung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0863962B1 (fr) 1995-11-30 2000-03-08 Wolfgang Christ Materiau de revetement thermo-isolant

Also Published As

Publication number Publication date
AT413549B (de) 2006-03-15
ATA17432003A (de) 2005-08-15
WO2005042840A2 (fr) 2005-05-12
WO2005042840A3 (fr) 2005-08-25

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