NO153065B - PROCEDURE FOR MANUFACTURING A FIBROST, FLAMMABLE CELLULOSE-CONTAINING MATERIAL - Google Patents
PROCEDURE FOR MANUFACTURING A FIBROST, FLAMMABLE CELLULOSE-CONTAINING MATERIAL Download PDFInfo
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- NO153065B NO153065B NO783951A NO783951A NO153065B NO 153065 B NO153065 B NO 153065B NO 783951 A NO783951 A NO 783951A NO 783951 A NO783951 A NO 783951A NO 153065 B NO153065 B NO 153065B
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- flame
- drying
- cellulose
- resistant
- ammonium
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 title abstract description 40
- 239000000203 mixture Substances 0.000 claims description 3
- 229920000137 polyphosphoric acid Polymers 0.000 claims 3
- 239000003054 catalyst Substances 0.000 claims 2
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 150000007860 aryl ester derivatives Chemical class 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- -1 cyclic acetals Chemical class 0.000 claims 1
- 239000000178 monomer Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 abstract description 15
- 239000001913 cellulose Substances 0.000 abstract description 15
- 238000001035 drying Methods 0.000 description 33
- 239000000126 substance Substances 0.000 description 16
- 239000003063 flame retardant Substances 0.000 description 12
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000007789 gas Substances 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 3
- 229920001276 ammonium polyphosphate Polymers 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 235000011007 phosphoric acid Nutrition 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 2
- 239000004114 Ammonium polyphosphate Substances 0.000 description 2
- GEHMBYLTCISYNY-UHFFFAOYSA-N Ammonium sulfamate Chemical compound [NH4+].NS([O-])(=O)=O GEHMBYLTCISYNY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical class [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 description 2
- 235000019289 ammonium phosphates Nutrition 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 235000010210 aluminium Nutrition 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical class N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- ZSNXVHPNVAFAEE-UHFFFAOYSA-N diammonium;phosphonatoamine Chemical class [NH4+].[NH4+].NP([O-])([O-])=O ZSNXVHPNVAFAEE-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 230000007903 penetration ability Effects 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical class [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
- D21C9/185—De-watering; Elimination of cooking or pulp-treating liquors from the pulp comprising at least one step where the pulp is suspended in a gaseous medium, e.g. flash drying
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Fireproofing Substances (AREA)
Abstract
FREMGANGSMÅTE FOR FREMSTILLING AV ET FIBRØST, FLAMMEBESTÅNDIG CELLULOSEHOLDIG. MATERIALE.PROCEDURE FOR MANUFACTURE OF A FIBROAST, FLAME RESISTANT CELLULOSE CONTAINING. MATERIAL.
Description
Foreliggende oppfinnelse vedrører en ny fremgangsmåte The present invention relates to a new method
til å gjøre materiale av cellulosefibre flammebestandig, og oppfinnelsen angår særlig anvendelse av en spesiell tørketeknikk for å tilveiebringe forbedret temporær eller permanent flammebestandighet hos celluloseholdige materialer. to make material of cellulose fibers flame resistant, and the invention particularly relates to the use of a special drying technique to provide improved temporary or permanent flame resistance of cellulose-containing materials.
Med betegnelsen "celluloseholdig materiale" menes i The term "cellulosic material" means i
denne sammenheng alle typer av masser fra- slipmasser til a-cellulose. in this connection all types of pulps from grinding pulps to α-cellulose.
At et materiale er "permanent flammebestandig",innebærer at materialet etter gjennomfukting med et overskudd av vann i minst 3 timer og tørking, når det utsettes for en flamme fra en bunsen-brenner, ikke underholder flammen og heller ikke til-later noen uønsket etterglødning. At et materiale er temporært flammebestandig, innebærer at materialets flammebestandighet går tapt når materialet utsettes for utluting og ikke oppfyller det angitte krav på permanent flammebestandighet. That a material is "permanently flame resistant" means that after soaking with an excess of water for at least 3 hours and drying, when exposed to a flame from a bunsen burner, the material does not sustain the flame nor does it allow any unwanted afterglow . That a material is temporarily flame resistant means that the material's flame resistance is lost when the material is exposed to leaching and does not meet the specified requirements for permanent flame resistance.
Kjente metoder for å gjøre celluloseholdig materiale flammebestandig bygger på det prinsipp at allerede ferdige, tørkede produkter i et spesielt trinn impregneres med et flammebeskyttende kjemisk stoff og deretter tørkes på nytt. Known methods for making cellulose-containing material flame-resistant are based on the principle that already finished, dried products are impregnated in a special step with a flame-protective chemical substance and then dried again.
På grunn av slike faktorer som produktenes form, tetthet, over-flatebeskaffenhet osv., er det imidlertid forbundet med store vanskeligheter, og det er under visse forhold praktisk talt umulig, å oppnå tilstrekkelig jevn fordeling av det flammebeskyttende kjemiske stoff i produktene. Av lignende grunner er den etterfølgende tørking også ofte forbundet med store prob-lemer . Due to such factors as the products' shape, density, surface nature, etc., however, it is associated with great difficulty, and it is under certain conditions practically impossible, to achieve a sufficiently even distribution of the flame-retardant chemical substance in the products. For similar reasons, the subsequent drying is also often associated with major problems.
Et formål med foreliggende oppfinnelse er å tilveiebringe et flammebestandig materiale med jevn fordeling av det An object of the present invention is to provide a flame-resistant material with uniform distribution thereof
flammebestandige kjermiske stoff i cellulosematerialet. flame-resistant chemical substances in the cellulose material.
Et annet formål med oppfinnelsen er å tilveiebringe et flammebestandig celluloseholdig materiale, hvilket materiale alt etter ønske, gjøres permanent eller temporært flammebestandig med en forenklet fremgangsmåte hvor man har impregneringstrinnet før den tørking av det celluloseholdige materiale som, uansett om man ønsker å flammebeskytte det celluloseholdige materiale eller ikke, må foretas. Flammebeskyttelsestrinnet inngår altså som et integrert ledd i fremstillingen av det celluloseholdige materiale, som deretter formes på forskjellige måter avhengig Another object of the invention is to provide a flame-resistant cellulosic material, which material, as desired, is made permanently or temporarily flame-resistant with a simplified method where one has the impregnation step before the drying of the cellulosic material which, regardless of whether one wishes to flame-protect the cellulosic material or not, must be undertaken. The flame protection step is therefore included as an integral part in the production of the cellulose-containing material, which is then shaped in different ways depending
av den slutlige anvendelse som tilsiktes. Dette innebærer at man i forhold til de kjente metoder helt kan eliminere et tørketrinn. of the intended end use. This means that compared to the known methods, a drying step can be completely eliminated.
Ifølge foreliggende oppfinnelse er det således tilveiebragt en fremgangsmåte for fremstilling av et fibrøst, flammebestandig celluloseholdig materiale, hvorved fortrinnsvis vannholdig, celluloseholdig materiale impregneres med et flammebeskyttende kjemisk stoff sam er oppløst i eller suspendert i vann, og denne fremgangsmåten er kjennetegnet ved at det impregnerte materiale oppdeles og eventuelt fluffes, samt at det på denne måte oppnådde materiale underkastes tørking og eventuelt herding i et system med en varm, fortrinnsvis turbulent gasstrøm, som samtidig transporterer det celluloseholdige materiale i tørke- og det eventuelle herdesystemet. According to the present invention, there is thus provided a method for the production of a fibrous, flame-resistant cellulosic material, whereby preferably water-containing, cellulosic material is impregnated with a flame-protective chemical substance dissolved in or suspended in water, and this method is characterized by the fact that the impregnated material divided and possibly fluffed, and that the material obtained in this way is subjected to drying and possibly curing in a system with a hot, preferably turbulent gas flow, which simultaneously transports the cellulose-containing material in the drying and possible curing system.
Impregneringen med det flammebeskyttende kjemiske stoff kan foretas på kjent måte hvorved det er vesentlig at impregneringen skjer slik at man får en jevn fordeling av det kjemiske stoff i det celluloseholdige materiale. For å øke impregner-ingsmidlets inntrengningsevne, kan overflateaktivt middel til-settes. Impregneringsmidlet, dvs. det flammebeskyttende kjemiske stoff eller en kombinasjon av flere forskjellige kjemiske stoff, foreligger herved oppløst eller suspendert i vann. Oppfinnelsen er ikke begrenset til noen spesiell type The impregnation with the flame-protective chemical substance can be carried out in a known manner, whereby it is essential that the impregnation takes place so that an even distribution of the chemical substance is obtained in the cellulose-containing material. In order to increase the impregnating agent's penetration ability, a surface-active agent can be added. The impregnating agent, i.e. the flame-protective chemical substance or a combination of several different chemical substances, is hereby dissolved or suspended in water. The invention is not limited to any particular type
av flammebeskyttende kjemisk stoff, men det er naturligvis egnet å velge slike kjemiske stoffer som ikke gir opphav til forstyrrelser ved den benyttede temperatur for tørking og eventuelt herding, eller som gir opphav til miljøforurensninger. Eksempler på egnede flammebeskyttende kjemikalier er fosfor-syrer, amidofosforsyrer, ammoniumfosfater, ammoniumsulfater, ammoniumsulfamat, ammoniumamidofosfater, ammoniumamidopolyfos-fater, ammoniumpolyfosfater, borsyre, natriumborater, aluminium- of flame-retardant chemical substance, but it is naturally suitable to choose such chemical substances which do not give rise to disturbances at the temperature used for drying and possibly curing, or which give rise to environmental pollution. Examples of suitable flame retardant chemicals are phosphoric acids, amidophosphoric acids, ammonium phosphates, ammonium sulfates, ammonium sulfamate, ammonium amidophosphates, ammonium amidopolyphosphates, ammonium polyphosphates, boric acid, sodium borates, aluminum
hydroksyd, ammoniumklorid, ammoniumbromid, kaliumaluminiumsulfat, antimonoksyd i kombinasjon med halogen, fosfater eller fosforsyre i kombinasjon med urea. Konsentrasjonen av det flammebeskyttende kjemiske stoff må være tilstrekkelig for å tilveiebringe et flammebestandig materiale, og den virksomme mengde av det flammebeskyttende kjemiske stoff er vanligvis opptil ca. 5-60 vekt-% beregnet på den tørre masse. hydroxide, ammonium chloride, ammonium bromide, potassium aluminum sulphate, antimony oxide in combination with halogen, phosphates or phosphoric acid in combination with urea. The concentration of the flame retardant chemical must be sufficient to provide a flame resistant material, and the effective amount of the flame retardant chemical is usually up to about 5-60% by weight calculated on the dry mass.
Før det gjennombløtte eller impregnerte materiale går Before the soaked or impregnated material goes
inn i tørkesystemet, er det vesentlig at materialet underkastes mekanisk oppdeling, slik som riving og eventuelt fluffing, slik at det oppnår egnet form for den etterfølgende behandling i tørkesystemet. into the drying system, it is essential that the material is subjected to mechanical division, such as shredding and possibly fluffing, so that it achieves a suitable form for the subsequent treatment in the drying system.
Det impregnerte og i passende grad findelte, celluloseholdige materiale innføres deretter i tørkesystemet hvor det møter en varm gasstrøm med en strømningshastighet som overstiger det inngående materialets svevehastighet. Det er hensiktmessig at gasstrømmen i tørkesystemet er turbulent og at fibrene i det celluloseholdige materiale foreligger i form av vesentlig frittliggende fibre. For at tørkingen og den eventuelle herding skal kunne styres og reguleres, er det hensiktsmessig å anordne oppvarmingsorganer, slik som oljebrennere, på et eller flere steder i tørkesystemet samt å fjerne den vanndamp som dannes ved oppvarmingen av det celluloseholdige fibermateriale. Fra-skillingen av vanndampen fra det celluloseholdige fibermateriale kan fortrinnsvis skje i separatorer av cyklontypen. Ved at man på denne måte anordner en eller flere tørkeanordninger og en eller flere separatorer i tørkesystemet, kan man på en fordel-aktig måte styre og regulere temperatur-tørkings-(herdings-)-forløpet i det celluloseholdige fibermateriale og tilpasse tørking og herding etter det benyttede celluloseholdige materiale, det flammebeskyttende kjemiske stoff samt den ønskede slutlige anvendelse av det oppnådde produkt. The impregnated and suitably finely divided cellulosic material is then introduced into the drying system where it encounters a hot gas stream with a flow rate that exceeds the levitation rate of the incoming material. It is appropriate that the gas flow in the drying system is turbulent and that the fibers in the cellulose-containing material are in the form of substantially detached fibers. In order for the drying and eventual curing to be controlled and regulated, it is appropriate to arrange heating devices, such as oil burners, at one or more places in the drying system and to remove the water vapor that is formed when the cellulose-containing fiber material is heated. The separation of the water vapor from the cellulose-containing fiber material can preferably take place in separators of the cyclone type. By arranging one or more drying devices and one or more separators in the drying system in this way, one can advantageously control and regulate the temperature-drying (curing) process in the cellulose-containing fiber material and adapt drying and curing to the cellulosic material used, the flame retardant chemical substance as well as the desired final use of the product obtained.
En type tørkeanordning som arbeider etter de angitte prinsipper, er den såkalte flash-tørker. Denne tørkeanordning anvendes for å tørke masser av forskjellige typer, men har hit-til aldri blitt benyttet for tørking av flammebeskyttet cellul-osemateriale. One type of drying device that works according to the stated principles is the so-called flash dryer. This drying device is used to dry masses of different types, but has so far never been used for drying flame-protected cellulose material.
Ved tørkefremgangsmåten ifølge foreliggende oppfinnelse, dannes en kombinasjon av det flammebeskyttende middel og cellul-osefiberen, og man oppnår et fibrøst celluloseholdig materiale som er flammebestandig uten å være permanent flammebestandig, hvilket for mange formål er helt tilfredsstillende. Dersom man imidlertid ønsker å fremstille materiale som er permanent flammebestandig, anvender man visse flammebeskyttende midler slik som fosforsyre eller ammoniumfosfater i kombinasjon med urea eller ammoniumsalter av amidofosforsyrer eller amidopolyfosfor-syrer eventuelt i kombinasjon med urea, og arbeider ved ytterligere forhøyet temperatur i ett med tørketrinnets sluttfase integrert herdetrinn for å tilveiebringe reaksjon, dvs. herding, mel-lom fibre og det flammebeskyttende middel. Temperaturen under tørkingen og den eventuelle herdingen samt oppholdstiden i tørke-(og herde-)systemet varierer naturligvis avhengig av det benyttede celluloseholdige utgangsmateriale, det flammebeskyttende kjemiske stoff og det ønskede sluttprodukt, og kan ved hjelp av enkle forutgående forsøk bestemmes for hvert enkelt tilfelle. In the drying process according to the present invention, a combination of the flame retardant and the cellulose fiber is formed, and a fibrous cellulosic material is obtained which is flame resistant without being permanently flame resistant, which for many purposes is completely satisfactory. If, however, you wish to produce material that is permanently flame resistant, you use certain flame retardants such as phosphoric acid or ammonium phosphates in combination with urea or ammonium salts of amidophosphoric acids or amidopolyphosphoric acids, possibly in combination with urea, and work at a further elevated temperature in conjunction with the drying stage final phase integrated curing step to provide reaction, i.e. curing, between fibers and the flame retardant. The temperature during the drying and possible curing as well as the residence time in the drying (and curing) system naturally varies depending on the cellulosic starting material used, the flame retardant chemical substance and the desired end product, and can be determined for each individual case with the help of simple preliminary experiments.
Foreliggende oppfinnelse belyses ytterligere gjennom følgende eksempler. The present invention is further illustrated through the following examples.
Eksempel 1 Example 1
Til en flash-tørker med 3 tørketrinn ble det ført en massebane bestående av helbleket kraftmasse på konvensjonell måte for tørking. Etter avvanningspressene, men før grov- og finrivningstrinnene, ble massen impregnert med en 50% oppløsning av ammoniumpolyfosfat ved påsprøyting til et opptak av ca. 25% av ammoniumpolyfosfat beregnet på tørrvekten beregnet på tørr masse. Omtrent 1 min etter tilsetningen av flammebeskyttelses-midlet, ble det tatt en prøve på den utkommende tørkede masse som var flammebestandig. Ingen anomaliteter i produksjons-prosessen kunne observeres. To a flash dryer with 3 drying stages, a pulp path consisting of fully bleached kraft pulp was fed in a conventional manner for drying. After the dewatering presses, but before the coarse and fine shredding steps, the mass was impregnated with a 50% solution of ammonium polyphosphate by spraying to an absorption of approx. 25% of ammonium polyphosphate calculated on the dry weight calculated on dry mass. Approximately 1 min after the addition of the flame retardant, a sample was taken of the resulting dried pulp which was flame resistant. No anomalies in the production process could be observed.
E ksempel 2 Example 2
Forsøket i eks. 1 ble gjentatt, men tilsetningen av flammebeskyttelsesmiddel var ca. 15%. The attempt in ex. 1 was repeated, but the addition of flame retardant was approx. 15%.
Den uttatte masse viste tilfredsstillende flammebestandighet . The extracted pulp showed satisfactory flame resistance.
Eksempel 3 Example 3
Forsøket i eks. 1 ble gjentatt, men med tilsetning av ca. 20% ammoniumsulfamat beregnet på tørrvekten beregnet på The attempt in ex. 1 was repeated, but with the addition of approx. 20% ammonium sulfamate calculated on the dry weight calculated on
tørr masse. Uttatt masse viste tilfredsstillende flammebestandighet . dry pulp. Extracted pulp showed satisfactory flame resistance.
Eksempel 4 Example 4
Til en oppløsningsbeholder inneholdende 60 deler vann ble det under kraftig omrøring tilsatt 20 deler findelt borsyre og 20 deler findelt boraks. Blandingen ble oppvarmet til ca. 60°C i løpet av 2 timer hvorved størstedelen av det tilsatte pulver gikk i oppløsning. To a solution container containing 60 parts of water, 20 parts of finely divided boric acid and 20 parts of finely divided borax were added with vigorous stirring. The mixture was heated to approx. 60°C during 2 hours whereby the majority of the added powder dissolved.
På samme måte som i eks. 1, ble blandingen tilsatt til en mengde av 20% beregnet på tørrvekten beregnet på tørr masse. In the same way as in ex. 1, the mixture was added to an amount of 20% calculated on the dry weight calculated on dry mass.
Uttatte masseprøver viste god flammebestandighet. Extracted pulp samples showed good flame resistance.
Eksempel 5 Example 5
Et vannfritt reaksjonsprodukt av NH2-P2°5 (fremstilt An anhydrous reaction product of NH2-P2°5 (prepared
ved brenning av elementært fosfor med tørr luft for fremstilling av vesentlig gassformig P2°5 som umiddelbart ble brakt til å reagere med NH^ i overskudd i forhold til den mengde som reagerer med ?2°5 °9 separasjon av reaksjonsproduktet i form av et hvitt pulver) inneholdende ca. 6,5% amidnitrogen, ble oppløst i vann til en konsentrasjon på 50% hvoretter pH-verdien ble inn-stilt til ca. 6,5 ved tilsetning av ammoniumhydroksydoppløsning. På samme måte som i eks. 1, ble oppløsningen tilsatt til en mengde av 20% (tørrvekt) beregnet på tørr masse. by burning elemental phosphorus with dry air to produce substantially gaseous P2°5 which was immediately brought to react with NH^ in excess of the amount that reacts with ?2°5 °9 separation of the reaction product in the form of a white powder) containing approx. 6.5% amide nitrogen was dissolved in water to a concentration of 50%, after which the pH value was adjusted to approx. 6.5 by adding ammonium hydroxide solution. In the same way as in ex. 1, the solution was added to an amount of 20% (dry weight) calculated on dry mass.
Uttatt masseprøve viste meget god flammebestandighet. A mass sample taken showed very good flame resistance.
Eksempel 6 Example 6
Forsøket ble utført på samme måte som i eks. 5, men The experiment was carried out in the same way as in ex. 5, but
med den forskjell at temperaturen i flash-tørkerens tre tørke-trinn ble øket over det normale. Ved de andre benyttede beting-elser ble følgende utgangstemperaturer målt for gassen i de forskjellige tørketrinn: with the difference that the temperature in the flash dryer's three drying stages was increased above normal. At the other conditions used, the following outlet temperatures were measured for the gas in the different drying stages:
Den uttatte masse viste permanente flammebestandighets-egenskaper. The extracted pulp showed permanent flame resistance properties.
1. Fremgangsmåte for fremstilling av et fibrøst, flammebestandig celluloseholdig materiale, hvorved fortrinnsvis vannholdig, celluloseholdig materiale impregneres med et flammebeskyttende kjemisk stoff som er oppløst i eller suspendert i vann, karakterisert ved at det impregnerte materiale oppdeles og eventuelt fluffes, samt at det på denne måte oppnådde materiale underkastes tørking og eventuelt herding i et system med en varm fortrinnsvis turbulent gasstrøm, som samtidig transporterer det celluloseholdige materiale i tørke-og det eventuelle herdesystemet. 2. Fremgangsmåte ifølge krav 1, karakterisert ved at den vanndamp som dannes i systemet, fra-skilles fra det celluloseholdige materiale og fjernes fra systemet . 3. Fremgangsmåte ifølge krav 1 eller 2, karakterisert ved at det celluloseholdige materiale oppdeles slik at det under tørke- og det eventuelle herdeforløpet foreligger i form av vesentlig frittliggende fibere. 4. Fremgangsmåte ifølge hvilket som helst av de fore-gående krav, karakterisert ved at tørkingen foretas i en flash-tørker. 1. Process for the production of a fibrous, flame-resistant cellulosic material, whereby preferably water-containing, cellulosic material is impregnated with a flame-protective chemical substance that is dissolved in or suspended in water, characterized in that the impregnated material is divided and possibly fluffed, and that on this material obtained in this way is subjected to drying and possibly curing in a system with a hot, preferably turbulent gas flow, which simultaneously transports the cellulose-containing material in the drying and possibly curing system. 2. Method according to claim 1, characterized in that the water vapor formed in the system is separated from the cellulose-containing material and removed from the system. 3. Method according to claim 1 or 2, characterized in that the cellulose-containing material is divided so that during the drying and possible curing process it exists in the form of substantially detached fibers. 4. Method according to any of the preceding claims, characterized in that the drying is carried out in a flash dryer.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7713497A SE420432B (en) | 1977-11-29 | 1977-11-29 | PROCEDURE FOR MANUFACTURING FLAMFAST PAPER MATERIAL |
| SE7811348A SE423728B (en) | 1977-11-29 | 1978-11-02 | PROCEDURE FOR MANUFACTURING FLAMFAST CELLULO MATERIAL |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO783951L NO783951L (en) | 1979-05-30 |
| NO153065B true NO153065B (en) | 1985-09-30 |
| NO153065C NO153065C (en) | 1986-01-08 |
Family
ID=26656919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO783951A NO153065C (en) | 1977-11-29 | 1978-11-23 | PROCEDURE FOR MANUFACTURING A FIBROST, FLAMMABLE CELLULOSE-CONTAINING MATERIAL |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5493078A (en) |
| CA (1) | CA1134213A (en) |
| DE (1) | DE2850496C2 (en) |
| FI (1) | FI68099C (en) |
| FR (1) | FR2410016B1 (en) |
| GB (1) | GB2010940B (en) |
| NO (1) | NO153065C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5282932A (en) * | 1992-10-19 | 1994-02-01 | Canadian Liquid Air Ltd./Air Liquide Canada Ltee | Process for pH and fire control in pulp balers |
| DE202011102812U1 (en) * | 2011-06-14 | 2011-12-05 | Hachemie Hamburger Chemikalien-Gesellschaft Mbh | Thermal insulation material from recycled paper with flame retardant composition |
-
1978
- 1978-11-17 CA CA316,418A patent/CA1134213A/en not_active Expired
- 1978-11-21 DE DE2850496A patent/DE2850496C2/en not_active Expired
- 1978-11-23 NO NO783951A patent/NO153065C/en unknown
- 1978-11-27 JP JP14541578A patent/JPS5493078A/en active Pending
- 1978-11-28 GB GB7846275A patent/GB2010940B/en not_active Expired
- 1978-11-28 FI FI783637A patent/FI68099C/en not_active IP Right Cessation
- 1978-11-29 FR FR787833721A patent/FR2410016B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2010940A (en) | 1979-07-04 |
| JPS5493078A (en) | 1979-07-23 |
| NO153065C (en) | 1986-01-08 |
| DE2850496A1 (en) | 1979-05-31 |
| FI68099C (en) | 1985-07-10 |
| DE2850496C2 (en) | 1982-07-01 |
| FI783637A (en) | 1979-05-30 |
| FR2410016B1 (en) | 1985-07-26 |
| FI68099B (en) | 1985-03-29 |
| CA1134213A (en) | 1982-10-26 |
| FR2410016A1 (en) | 1979-06-22 |
| NO783951L (en) | 1979-05-30 |
| GB2010940B (en) | 1982-06-16 |
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