EP1229165B1 - Nappe ininflammable contenant des fibres cellulosiques régénérées - Google Patents

Nappe ininflammable contenant des fibres cellulosiques régénérées Download PDF

Info

Publication number
EP1229165B1
EP1229165B1 EP20020000887 EP02000887A EP1229165B1 EP 1229165 B1 EP1229165 B1 EP 1229165B1 EP 20020000887 EP20020000887 EP 20020000887 EP 02000887 A EP02000887 A EP 02000887A EP 1229165 B1 EP1229165 B1 EP 1229165B1
Authority
EP
European Patent Office
Prior art keywords
flame
flame retardant
regenerated cellulose
fibrous nonwoven
nonwoven web
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.)
Expired - Lifetime
Application number
EP20020000887
Other languages
German (de)
English (en)
Other versions
EP1229165A1 (fr
Inventor
Horst Dipl.-Ing. Blum
Stefan Dipl.-Chem. Sick
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.)
PAPCEL Papier und Cellulose Technologie- und Handelsgesell mbH
Schoeller und Hoesch GmbH
Original Assignee
PAPCEL Papier und Cellulose Technologie- und Handelsgesell mbH
Schoeller und Hoesch 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 PAPCEL Papier und Cellulose Technologie- und Handelsgesell mbH, Schoeller und Hoesch GmbH filed Critical PAPCEL Papier und Cellulose Technologie- und Handelsgesell mbH
Publication of EP1229165A1 publication Critical patent/EP1229165A1/fr
Application granted granted Critical
Publication of EP1229165B1 publication Critical patent/EP1229165B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/02—Synthetic cellulose fibres
    • D21H13/08—Synthetic cellulose fibres from regenerated cellulose
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/07—Nitrogen-containing compounds
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/10—Phosphorus-containing compounds
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds

Definitions

  • the present invention relates to a flameproof nonwoven fabric comprising regenerated cellulose fibers and a process for producing the same.
  • Cryogenic tank systems such as storage tanks or transport tanks for temperature-sensitive substances such.
  • Liquid gases usually consisting of an outer tank and an inner tank, wherein the inner tank is inserted into the outer tank, that between the outer and the inner tank, a space remains, which can be evacuated with a view to a good insulating effect.
  • both the outer and the inner tank are usually surrounded with insulating materials.
  • cryogenic insulation which is a composite structure of a glass fiber fleece or a glass fiber fabric and an aluminum foil.
  • fiberglass fabrics and / or nonwoven fabrics may exhibit hard-crystalline fiber fragments in the event of breakage or destruction of the fabric or web which are believed to be responsible for certain diseases such as silicosis.
  • the JP-A-49-094903 discloses a paper substitute material consisting of 50 to 90 parts of non-meltable fine fibers having a fiber diameter of up to 10 ⁇ m and 50 fire-resistant up to 10 parts of rayon fibers containing 10 to 40% phosphorus-containing polymer is.
  • JP-A-50-053 428 discloses nonwoven fabrics or papers treated with an emulsion of a copolymer of ethylene, vinyl chloride and a crosslinking monomer or a copolymer of ethylene, vinyl chloride, a crosslinking monomer and vinyl acetate.
  • DE-A-20 45 118 discloses a process for producing a nonwoven viscose fiber product, characterized in that viscose fibers containing hydroxymethyl cellulose xanthate are dispersed in an aqueous medium such that the dispersed viscose fibers are made into a web such that the viscose fibers be swelled that the swollen viscose fibers are bonded together, and that the hydroxymethyl cellulose xanthate is decomposed in the viscose fibers to cellulose.
  • RO-A-72989 discloses a flameproofing agent for synthetic fiber paper comprising a condensate of phosphoric acid and urea (1: 3).
  • JP-A-51-092305 discloses cellulosic materials impregnated or surface treated with aqueous solutions of ammonium polyphosphate, urea and dicyandiamide.
  • US-A-3 819 518 discloses cellulosic materials which have been fireproofed with a composition of a phosphoric acid salt and a salt of guanidine, guanylurea or a biguanide.
  • GB-A-2 325 248 describes the production of a paper containing lyocell fibers on an inclined wire paper machine.
  • the present invention is a flame-resistant nonwoven having a LOI value (limiting oxygen index) of at least 65, the fiber material is applied with a flame retardant, wherein the fiber material of grindable and fibrillable cellulose regenerated with a freeness of 5 to 75 ° SR and optionally 0 , 1 to 90% based on the nonwoven weight, natural and / or synthetic long fibers.
  • LOI value limiting oxygen index
  • the present invention further provides a process for producing a refractory nonwoven having a limiting oxygen index (LOI) of at least 65 by charging a slurry of fibrous material comprised of millable and fibrillatable regenerated cellulose fibers having a freeness of from 5 to 75 ° SR and optionally 0.1 to 90% based on the nonwoven weight, natural and / or synthetic long fibers, with a flame retardant on a paper machine.
  • LOI limiting oxygen index
  • nonwoven we mean according to the invention non-woven, sheet-like materials which consist of substantial proportions of synthetic fibers.
  • the fibers used to produce the nonwoven fabric according to the invention are millable and fibrillatable regenerated cellulose fibers, which may optionally contain from 0.1 to 90%, based on the paper weight, of natural and / or synthetic long fibers.
  • Cellulose regenerate fibers are defined in the specialist literature (see, for example, sucralose, Vol. 2, Verlag Harri Deutsch, Thun, 1979, p.1551) as chemical pulps obtained by regenerating dissolved cellulose by the wet spinning process.
  • the long fibers may be, for example, those of softwood pulps, sisal, kenaf, jute, hemp, flax, abaca fibers and synthetic fibers such as polyester and polyethylene fibers.
  • the regenerated cellulose fibers used in the present invention are preferably the lyocell fibers known in the art.
  • lyocell fibers The production of lyocell fibers is known in the art. Usually, pulp is dissolved in an aqueous amine oxide solution. The resulting solution is then extruded in dilute amine oxide to cellulose in fibrous form, which fibers may optionally be subjected, after washing, to finishing treatment tailored to end use.
  • the cellulose generator fibers according to the invention are fibers having a freeness of 5 to 75 ° SR (the freeness is carried out according to the invention in a known manner in the art with a MahlgradprüfICI Schopper Riegler), suitably with a freeness of 30 to 60 ° SR and preferably with a Grinding degree from 45 to 55 ° SR.
  • the flame retardants used according to the invention are usually phosphorus- and / or nitrogen-containing compounds which can be used individually or in combinations.
  • Examples of usable phosphorus compounds are organic phosphorus compounds such as cyclic and acyclic phosphonate and diphosphonate esters, alkylphosphonic acids and their salts, chlorinated phosphorus compounds such as chlorinated phosphonate esters or chlorinated phosphate esters, organic phosphorus nitrogen compounds such as alkylamine phosphate salts, aminophosphonic acids and their salts, or inorganic phosphorus compounds such as ammonium salts of Phosphates and polyphosphates, eg Ammonium dihydrogen phosphate or sodium dihydrogen phosphate, pyrophosphoric acids or any combination of the above compounds.
  • organic phosphorus compounds such as cyclic and acyclic phosphonate and diphosphonate esters, alkylphosphonic acids and their salts
  • chlorinated phosphorus compounds such as chlorinated phosphonate esters or chlorinated phosphate esters
  • organic phosphorus nitrogen compounds such as alkylamine phosphate salts, aminophosphonic
  • nitrogen compounds are urea, thiourea, cyanamides, dicyanamides, methylol cyanamides, cyanates such as ammonium cyanate, thiocyanates and melamines.
  • aqueous solutions of inorganic dihydrogen phosphates are used in combination with alkylphosphonic acids or cyanamides.
  • the proportion of the acted flame retardant according to the invention is usually at least 40 wt .-%, based on the fiber weight, suitably at least 100 wt .-%, and preferably at least 150 wt .-% flame retardant.
  • a nonwoven according to the invention treated with flame retardant in accordance with the process of the invention can absorb a very high amount of flame retardant while maintaining the other important physical properties of the nonwoven, such as strength and elongation.
  • the nonwoven according to the invention usually has a breaking force in the longitudinal direction of more than 3.2 N / 15 mm, advantageously of more than 5.0 N / 15 mm, and preferably of more than 6.5 N / 15 mm.
  • the nonwoven fabric of the present invention typically has a transverse breaking force greater than 1.0 N / 15 mm, more preferably greater than 2.0 N / 15 mm, and more preferably of more than 2.5 N / 15 mm.
  • the breaking load in the longitudinal or transverse direction was determined according to the invention according to DIN EN ISO 1924/2.
  • the nonwoven fabric according to the invention usually has an elongation at break in the longitudinal direction of more than 0.5%, advantageously more than 0.7% and preferably more than 0.8 %.
  • the nonwoven according to the invention further has, for example, at a basis weight of 27 g / m 2 after being applied, usually a transverse elongation at break of more than 0.5%, advantageously more than 0.9% and preferably more than 1, 2%.
  • the elongation at break in the longitudinal or transverse direction was determined according to the invention according to DIN EN ISO 1924/2.
  • the flame retardancy of the nonwovens according to the invention was determined according to the invention by the indication of the LOI value (limiting oxygen index) according to ASTM D-2863.
  • the nonwoven fabric according to the invention has an LOI value of more than 75 and preferably an LOI value of more than 85.
  • the nonwoven according to the invention moreover has a high air permeability of more than 2500 l / m 2 s, preferably of more than 2800 l / m 2 s.
  • the air permeability was determined according to the invention by Akustromunk according to DIN EN ISO 9237.
  • the gap between the inner and outer tank can be easily evacuated at a cryogenic tank system produced with the nonwoven fabric according to the invention as cryogener insulation and the cryogenic insulating layer itself, since the nonwoven according to the invention shows only a slight moisture absorption.
  • the nonwoven according to the invention expediently has a surface basis weight of 8 to 50 g / m 2 and preferably 9 to 30 g / m 2, without including the additional constituents to be acted upon, including flame retardants.
  • the basis weight was determined according to the invention according to DIN ISO 536.
  • the weight per unit area of the nonwoven according to the invention is expediently 11 to 150 g / m 2 and preferably 27 to 90 g / m 2 .
  • a further embodiment of the present invention provides a process according to claim 6 for producing a refractory nonwoven comprising regenerated cellulose fibers having an LOI of at least 65 by imparting a slurry of cellulosic fibers with a flame retardant to a paper machine.
  • the paper machine used is an oblique screen paper machine, which corresponds to the state of the art and is shown in the attached figure.
  • fibers are used according to the invention as starting materials, which undergo a grinding were.
  • a fiber mixture to be used is subjected to grinding, for example using a refiner.
  • a defoamer may be added to the fiber mixture.
  • the defoamer is used in an amount of 0.001 to 5 vol .-%, based on the fiber mixture.
  • the defoamer to be used is usually defoamers known in the art, for example aqueous emulsions of aliphatic hydroxy compounds.
  • fibers with a freeness of 5 to 75 ° SR (the degree of grinding is carried out according to the invention in the art known manner with a MahlgradprüfICI Schopper Riegler), suitably with a freeness of 30 to 60 ° SR and preferably with a freeness of 45 to 55 ° SR used.
  • the strengths of the nonwoven fabric according to the invention achieved by fiber-fiber bonding can be improved.
  • the use of fibers having a suitable degree of grinding makes it possible to dispense with the concomitant use of a strength-improving binder in the production of the nonwoven fabric according to the invention. Due to the absence of a binder, the absorption capacity of the nonwoven fabric according to the invention for the flame retardant is not impaired according to the invention. This is all the more surprising, since the concomitant use of a binder is usually necessary when loading the fibers with a larger amount of flame retardants used here.
  • the waiver of the use of binders brings according to the invention the advantage that the flame resistance of the nonwoven fabric according to the invention is not impaired.
  • a fiber suspension is produced with water, which is fed via a so-called headbox of the paper machine.
  • This essentially has a peripheral sieve, which is passed over a number of dewatering chambers.
  • the suspension is passed onto the sieve via first dewatering chambers, the water being drawn off through the chambers and the dewatering line. This forms a fibrous layer on the moving screen.
  • the now formed fiber layer is removed from the screen and fed to a drying.
  • This drying can be done in various ways, for. B. by contact drying or through-flow drying.
  • the drying is through-flow drying using hot air.
  • the obtained web is rolled up on a roll.
  • Lyocell fibers of 8 mm average fiber length which do not comprise any further fiber blends, are subjected to milling, adjusting 44 ° SR (Schopper-Riegler).
  • a commercially available defoamer (Afranil®, aqueous emulsion of aliphatic hydroxy compounds) is added in an amount of 0.05%, based on the weight of the fiber.
  • the fleece in the size press is treated with a mixture of commercially available flame retardant (1: 1 mixture of Antiblaze® (an aqueous solution of polyphosphoric acid salts) and dicyandiamide (cyanoguanidine)) after a first drying over a flow dryer.
  • a mixture of commercially available flame retardant (1: 1 mixture of Antiblaze® (an aqueous solution of polyphosphoric acid salts) and dicyandiamide (cyanoguanidine)
  • the amount of fiber applied to the moving screen via the headbox is adjusted so that the nonwoven has a weight per unit area of 9 g / m 2 without being loaded.

Landscapes

  • Nonwoven Fabrics (AREA)
  • Artificial Filaments (AREA)
  • Fats And Perfumes (AREA)
  • Woven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Claims (9)

  1. Tissu non tissé ignifugé comprenant une valeur d'indice limite d'oxygène d'au moins 65, dont le matériau fibreux est imprégné d'une solution ignifuge, caractérisé en ce que le matériau fibreux est constitué de fibres de cellulose régénérée pouvant être fibrillées et raffinées présentant un degré de raffinage de 5 à 75°SR, et éventuellement 0,1 à 90%, par rapport au poids du tissu non tissé, de fibres longues naturelles et/ou synthétiques.
  2. Tissu non tissé ignifugé selon la revendication 1, caractérisé en ce que les fibres de cellulose régénérée sont constituées de fibres de lyocell.
  3. Tissu non tissé ignifugé selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le poids surfacique se situe entre 11 et 150 m2/g.
  4. Tissu non tissé selon la revendication 1, 2 ou 3, caractérisé en ce que la solution ignifuge est sélectionnée parmi des esters phosphatés et diphosphatés cycliques et acycliques, des acides phosphoniques alkyles, des liaisons phosphore chlorées, des liaisons organiques azote - phosphore ou des liaisons phospore anorganiques, des acides pyrophosphores, des liaisons azote organiques ou des combinaisons au choix établies à partir des liaisons susmentionnées.
  5. Tissu non tissé ignifugé selon l'une quelconque des revendications précédentes, caractérisé en ce que la proportion de solution ignifuge imprégnée s'élève au moins à 40% en poids, par rapport au poids des fibres.
  6. Procédé de fabrication d'un tissu non tissé ignifugé, caractérisé en ce qu'il comprend une valeur d'indice limite d'au moins 65, obtenue en imprégnant une suspension de matériau fibreux, qui est constitué de fibres de cellulose régénérée pouvant être fibrillées et raffinées présentant un degré de raffinage de 5 à 75°SR et éventuellement 0,1 à 90%, par rapport au poids du tissu non tissé, de fibres longues naturelles et/ou synthétiques, d'une solution ignifuge sur une machine à papier.
  7. Procédé selon la revendication 6, caractérisé en ce que les fibres de cellulose régénérée sont constituées de fibres de lyocell.
  8. Procédé selon l'une quelconque des revendications 6 ou 7, caractérisé en ce que l'ajout de la solution ignifuge intervient dans la presse encolleuse.
  9. Procédé selon l'une quelconque des revendications 6 ou 7, caractérisé en ce que l'ajout est réalisé au moyen d'une rampe de vaporisation ou d'un dispositif d'humidification.
EP20020000887 2001-01-31 2002-01-15 Nappe ininflammable contenant des fibres cellulosiques régénérées Expired - Lifetime EP1229165B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10104277 2001-01-31
DE2001104277 DE10104277B4 (de) 2001-01-31 2001-01-31 Flammfestes Vlies, das Celluloseregeneratfasern umfasst

Publications (2)

Publication Number Publication Date
EP1229165A1 EP1229165A1 (fr) 2002-08-07
EP1229165B1 true EP1229165B1 (fr) 2006-03-29

Family

ID=7672316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020000887 Expired - Lifetime EP1229165B1 (fr) 2001-01-31 2002-01-15 Nappe ininflammable contenant des fibres cellulosiques régénérées

Country Status (3)

Country Link
EP (1) EP1229165B1 (fr)
DE (2) DE10104277B4 (fr)
ES (1) ES2177481T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100594272C (zh) * 2003-10-08 2010-03-17 西巴特殊化学品控股有限公司 用于减少纸张掉毛和掉粉的添加剂
DE102004015356A1 (de) * 2004-03-30 2005-10-20 Clariant Gmbh Phosphorhaltige Flammschutzmittelzusammensetzung für cellulosehaltige Materialien

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756032A (fr) * 1969-09-12 1971-02-15 Mitsubishi Rayon Co Procede de preparation d'un produit fibreux non tisse
US3819518A (en) * 1972-07-31 1974-06-25 Apex Chem Co Inc Scorch-resistant water-soluble flame-retardants for cellulose
JPS4994903A (fr) * 1973-01-23 1974-09-09
JPS5642718B2 (fr) * 1973-09-13 1981-10-06
JPS5847520B2 (ja) * 1975-02-04 1983-10-22 住友化学工業株式会社 セルロ−スケイザイリヨウノ タイネツナンネンカシヨリホウホウ
GB9416616D0 (en) * 1994-08-17 1994-10-12 Courtaulds Fibres Holdings Ltd Cellulosic textile materials
US5749537A (en) * 1995-11-07 1998-05-12 Lydall, Inc. Method of wrapping cryogenic insulation around an inner cryogenic tank
GB2325248B (en) * 1997-05-15 2001-06-27 J R Crompton Ltd Paper

Also Published As

Publication number Publication date
EP1229165A1 (fr) 2002-08-07
ES2177481T1 (es) 2002-12-16
ES2177481T3 (es) 2006-09-16
DE10104277A1 (de) 2002-08-14
DE50206179D1 (de) 2006-05-18
DE10104277B4 (de) 2008-02-21

Similar Documents

Publication Publication Date Title
DE69112089T2 (de) Durch die Vernetzung von Holzstoffasern mit Polykarbonsäuren erhaltene elastische, voluminöse Faser.
DE69513978T2 (de) Lyocell-faser und verfahren zu ihrer herstellung
DE69107784T2 (de) Papierhandtuch mit voluminöser Lage.
DE69327327T2 (de) Vernetzte zellstoffprodukte und verfahren zu ihrer herstellung
AT401656B (de) Flammfestes nicht gewebtes textiles gebilde
DE69504510T2 (de) Verfahren zur herstellung von lyocell-faser
AT502743B1 (de) Cellulosischer formkörper, verfahren zu seiner herstellung und dessen verwendung
DE19854732C1 (de) Kern-Mantel Bikomponentenfaser und deren Verwendung
DE6925092U (de) Zellulosefaserbahn.
EP2916928B1 (fr) Matériau filtrant ignifugé à haute capacité d'accumulation de poussières pour la filtration de gaz
DE69602584T2 (de) Spinnvliesstoff mit hoher schütt- und hoher absorptionskapazität und verfahren zur herstellung desselben
DE102009043428A1 (de) Dünnvliesstoff auf Basis von Naturfasern und Verfahren zu seiner Herstellung
DD274061A5 (de) Ungewebtes faserprodukt
DE3214948A1 (de) Verfahren zur herstellung von aktivierten kohlenstoffasern
DE2807597C2 (de) Verfahren zur Herstellung einer thermisch gebundenen nicht-gewebten Faserstruktur
EP1229165B1 (fr) Nappe ininflammable contenant des fibres cellulosiques régénérées
DE102005015196A1 (de) Verfahren zur flammhemmenden Ausrüstung von Faserprodukten
EP2089456A1 (fr) Procédé de production de matériaux composites à fibres ignifugés ou pré-imprégnés
DE102022112586A1 (de) Wundauflage
DE102016125431A1 (de) Imprägniertes Gasfiltermaterial und daraus hergestelltes Filterelement
DE3707357A1 (de) Gebundene flaechengebilde aus anorganischen fasern
DE2503616A1 (de) Impraegniermittel und seine verwendung zur herstellung von flammfesten, wasserabstossenden papiererzeugnissen
DE2036879C3 (de) Mischfaser-Vliese, insbesondere für Windelhüllen und andere hygienische Zwecke
EP3871836A1 (fr) Produit abrasif, produit semi-fini pour un produit abrasif et leur procédé de fabrication
DE102023129562A1 (de) Profilierte Zellulosefaser mit verbesserter Zugkraft und Verfahren zu ihrer Herstellung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

GBC Gb: translation of claims filed (gb section 78(7)/1977)
EL Fr: translation of claims filed
17P Request for examination filed

Effective date: 20030129

17Q First examination report despatched

Effective date: 20030228

AKX Designation fees paid

Designated state(s): DE ES FR GB

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20060329

REF Corresponds to:

Ref document number: 50206179

Country of ref document: DE

Date of ref document: 20060518

Kind code of ref document: P

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2177481

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070102

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20110201

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20110121

Year of fee payment: 10

Ref country code: GB

Payment date: 20110121

Year of fee payment: 10

Ref country code: DE

Payment date: 20110331

Year of fee payment: 10

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120115

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120115

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120801

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50206179

Country of ref document: DE

Effective date: 20120801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120131

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20130708

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120116