EP0024703B1 - Procédé pour la préparation de matériaux pour filtre - Google Patents

Procédé pour la préparation de matériaux pour filtre Download PDF

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Publication number
EP0024703B1
EP0024703B1 EP80105000A EP80105000A EP0024703B1 EP 0024703 B1 EP0024703 B1 EP 0024703B1 EP 80105000 A EP80105000 A EP 80105000A EP 80105000 A EP80105000 A EP 80105000A EP 0024703 B1 EP0024703 B1 EP 0024703B1
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EP
European Patent Office
Prior art keywords
substrate
solvent
process according
web
resin
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
Application number
EP80105000A
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German (de)
English (en)
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EP0024703A1 (fr
EP0024703B2 (fr
Inventor
Manfred Römer
Werner Zeh
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.)
Morton Thiokol GmbH
Original Assignee
Morton Thiokol GmbH
Duerr GmbH
Duerr Anlagenbau GmbH
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Publication date
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Application filed by Morton Thiokol GmbH, Duerr GmbH, Duerr Anlagenbau GmbH filed Critical Morton Thiokol GmbH
Priority to AT80105000T priority Critical patent/ATE3072T1/de
Publication of EP0024703A1 publication Critical patent/EP0024703A1/fr
Publication of EP0024703B1 publication Critical patent/EP0024703B1/fr
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Publication of EP0024703B2 publication Critical patent/EP0024703B2/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
    • D06M14/18—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation
    • D06M14/20—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of natural origin
    • D06M14/22—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials using wave energy or particle radiation on to materials of natural origin of vegetal origin, e.g. cellulose or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper

Definitions

  • FR-A-2241 384 describes the production of nonwoven substrates by grafting on polymers with optionally monomers onto lignocellulose paper materials. Such paper materials are said to have a high absorption capacity for water and are not suitable for filter materials for oil and air filters.
  • FR-A-2241 384 cardboard is impregnated with an impregnating agent consisting of a solution of a prepolymer and a monomer, followed by curing with electron beams. This does not address the manufacture of filter materials.
  • the object of the invention is therefore to provide an economical process for the production of filter materials for motor vehicles which can be carried out with little energy expenditure and little outlay on equipment and which leads to end products with superior properties.
  • various polymers can be crosslinked by high-energy radiation, for example by UV radiation, a, ⁇ and y radiation.
  • high-energy radiation for example by UV radiation, a, ⁇ and y radiation.
  • Such crosslinking reactions have hitherto been used, for example, in the curing of paints (DE-A-2 029 145).
  • electron beam curing can also be applied to the partial coating of nonwoven and paper substrates while maintaining a residual permeability of the treated substrates.
  • the invention therefore relates to a method for producing filter materials for oil and air filters for motor vehicles by impregnating a paper or nonwoven substrate with resin and / or monomer and subsequently curing the substrate.
  • the process according to the invention is characterized in that the substrate is impregnated with a solution or dispersion of at least one resin and / or monomer which is curable by electron beams and which has a concentration of 1 to 50% by weight of resin and / or monomer, based on the weight contains the solution or dispersion, then removes the solvent and then causes curing by electron radiation.
  • the substrate to be treated is first impregnated with a solution or dispersion, preferably a solution, a resin or monomers in a suitable inert organic liquid.
  • Compounds curable by electron radiation are suitable as monomers or resins.
  • Particularly suitable monomers are polyacrylated and / or polymethacrylated polyols, polyacrylated polyols being preferred because of the higher reaction rate.
  • Polyols on which the monomers which can be used according to the invention are based can be straight or branched chain and one or more heteroatoms, e.g. B. in the form of oxygen bridges. They preferably have 2 to about 10, in particular 5 to 9 and particularly preferably 5 or 6, carbon atoms. They preferably contain 2 to about 5 and in particular 2, 3 or 4 hydroxyl functions. Preferred examples of such polyols are:
  • Trimethylolpropane pentaerythritol or pentaerythritol, hexanediol, in particular hexane-1,6-diol and polyethylene glycols or propylene glycol, such as triethylene glycol or tripropylene glycol.
  • hydroxyl groups of the polyols mentioned can be wholly or partially esterified by acrylic acid and / or methacrylic acid.
  • usable monomers according to the invention are trimethylolpropane triacrylate, hexanediol diacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, hexane-1,6-diol diacrylate, di- ethylene glycol diacrylate, Triäthylenglykoldiacrylat, Tetraäthylenglykoldiacrylat, Tripropyiengiykoidiacrylat, 2-Hydroxyäthyiacrylat, 2-hydroxypropyl acrylate, and Hexandiolmonoacrylat Butandiolmonoacrylate and the corresponding methacrylates or mixed Acrylate methacrylates.
  • the monomers can be used alone or in a mixture, if appropriate with high or low molecular weight prepolymers.
  • Particularly suitable monomers are pentaerythritol triacrylate or pentaerythritol acrylate mixtures with an average degree of esterification of 3 to 3.3 and with a viscosity of 600 to 1200 mPa - s (measured at 20 ° C. with the Brookfield viscometer, type RVT).
  • Suitable resins are high or low molecular weight resins or oligomers which are soluble in the inert organic liquids used. Examples of this are soluble polyurethane acrylates formed from the aforementioned hydroxy-functional acrylate monomers.
  • the molecular weight of such resins or oligomers is preferably in the range from 800-8000 and their viscosities go from 1000-50,000 mPa ⁇ s.
  • the acrylic and / or methacrylic content unsaturated monomer units is, for example, 2-6 per molecule.
  • Resins of this type were produced by customary procedures, for example as described in DE-A-2530896 and DE-A-2 542 314.
  • a polyol is reacted with a diisocyanate.
  • the free NCO group content is then saturated with hydroxy-functional acrylate or methacrylate monomers.
  • the person skilled in the art can choose amounts and reaction conditions such that the desired molecular weights and the desired content of acrylic and / or methacrylic unsaturated monomer units are achieved.
  • the viscosities can be varied, for example, by appropriate dilution of the resins with monomers.
  • Suitable inert organic liquids for dissolving or dispersing the monomers or resins are customary inert organic solvents, such as aliphatic alcohols with, for example, 1 to 6 carbon atoms, in particular methanoi and ethanol, aliphatic ketones with, for example, 3 to 6 carbon atoms, in particular dimethyl ketone and methyl ethyl ketone, and also esters, in particular alkyl acetate with, for example, 1 to 4 carbon atoms in the alkyl part, for. B. methyl acetate and ethyl acetate.
  • solvents can either be used alone or as a mixture be used.
  • the monomer and / or resin is used in the solvent to impregnate the nonwoven or paper substrates in concentrations of 1.0 to 50% by weight, based on the sum of the weight of monomers and / or resin and solvent.
  • the solutions thus contain 1.0 to 50 parts by weight of monomer and / or resin and 99 to 50 parts by weight of solvent. Preferred ranges are 2.0 to 40 parts by weight of monomer and / or resin and 98.0 to 60 parts by weight of solvent. For example, 10, 20, 30, 40 or 50 parts by weight of monomer and / or resin and 90, 80, 70, 60 or 50 parts by weight of solvent can be used.
  • concentration of the monomer and / or resin in the solvent ultimately depends on the desired degree of coverage of the substrate with the monomer or resin.
  • the substrate to be treated can be impregnated in any way with the solution or the dispersion of the monomer and / or resin in the solvents mentioned. Dipping treatment is preferably carried out. After the immersion treatment, the substrate passes through a drip zone and a drying zone, in which temperatures of approximately 120 to 140 ° C. are maintained, depending on the solvent. The solvent is recovered in the pure state from the drying zone and can be used again for the same purpose or for other purposes.
  • the amount of resin or monomer remaining on the substrate is independent of the immersion time in the solution and depends only on the concentration of the solution used.
  • concentration of the solution used therefore depends on the desired degree of occupancy or the desired properties, such as. B. the degree of permeation of the nonwoven or filter material to be produced.
  • Preferred ranges for the assignment are, depending on the intended use of the final product at 5 to 45 wt 0 / o, especially from 5 to 40 wt .-%, for example at 10 to 25 weight-0 / o, or at 15, 25 or 45 wt .-%, based on the mass of the substrate.
  • the following resin / oligomer concentrations generally give the following assignments (measured as an increase in nonwoven mass in%):
  • nonwoven or paper materials pretreated in this way are stable in storage.
  • treated nonwoven or paper webs can be transported and stored in the form of rolls. Even if such rolls are stored in a side-by-side form for longer periods before crosslinking, no tendency of the impregnated material to migrate due to gravity is observed; rather, the uncured monomer or resin applied remains distributed uniformly over the substrate.
  • the materials cured according to the invention are particularly easy to process.
  • they can be easily processed into folded forms, whereby the tendency to form fractures is reduced in comparison with products conventionally treated and hardened with phenolic resins.
  • this also prevents the formation of unwanted dusts.
  • dusts pose a health risk in addition to the cleaning samples resulting therefrom, since phenolic products are to be considered as carcinogenic substances.
  • the nonwoven or paper materials impregnated according to the invention are finally hardened before or after a possible finishing treatment.
  • the unsaturated acrylate resin is cured by radial chain polymerization, which leads to chain growth with a high three-dimensional degree of branching.
  • the substrates subjected to the impregnation, draining and drying treatment are subjected to a short-term irradiation with high-energy jets of low dose.
  • Electron or ⁇ radiation is preferably used for this purpose.
  • the radiation can be generated by conventional electron sources.
  • one or more multi-stage electron accelerators are used. It has proven to be particularly advantageous to carry out the curing process using the device according to the invention described below.
  • acceleration voltages of approximately 150 to 500 kV have proven to be suitable. In general, acceleration voltages of 200 kV or acceleration voltages of 150 to 200 kV can be used successfully.
  • the penetration depth of the electron radiation depends on the specific weight of the impregnated substrate, that is to say on substrate + impregnated monomers and / or resin.
  • an electron voltage of 150 to 180 kV is sufficient to penetrate into a substrate impregnated according to the invention with a specific weight of 1 to a depth of approximately 120 gm to 16 ⁇ m.
  • the curing speed depends on the radiation dose used. in general, dosages of 0.1 to about 16 Mrad, preferably 0.1 to 10 Mrad, and particularly preferably 1 to about 10 or 4 to 8 Mrad, have been found to be satisfactory for achieving favorable production speeds.
  • the substrate impregnated according to the invention if appropriate in conditioned form, is generally passed in a web shape under an inert gas, such as nitrogen, past a window from which the electron radiation emerges.
  • the distance of the substrate from the exit window is generally 10 to 50 mm.
  • cellulose-based and plastic-based nonwoven and paper materials can be coated with resins.
  • Suitable are, for example, filter papers based on cellulose or plastic and nonwoven materials based on cellulose and plastic, such as are used for the production of oil filters in the motor vehicle industry and air filters in the motor vehicle industry.
  • the method according to the invention has proven to be particularly favorable when applied to products with a cellulose content or based on cellulose. A lignin content in the cellulose does not interfere. A special advantage, which at the.
  • products can be produced which, depending on the starting substrate used and the amount of partial coverage, have a controllable residual permeability and can therefore be used as filter materials for oil or air filters in the motor vehicle industry .
  • the substrates according to the invention proved to be resistant to mechanical, chemical and temperature influences.
  • the polymerized impregnating resins are present as resites, i.e. H. they are insoluble in organic solvents and can no longer be melted, which is advantageous, for example, for use in motor vehicles at high engine temperatures.
  • the process according to the invention is characterized above all by the lower energy expenditure, ie by the elimination of high curing temperatures and by the reduction in the expenditure on apparatus (no longer furnace channels are required) and by the increased throughput speed.
  • the lower energy expenditure ie by the elimination of high curing temperatures and by the reduction in the expenditure on apparatus (no longer furnace channels are required) and by the increased throughput speed.
  • there is no risk to the environment and workplaces from the development of harmful vapors since no low-molecular-weight cleavage or reaction products are released during the polymerization of the impregnating resins used according to the invention.
  • Further advantages are that the soaked intermediate products obtained are stable in storage and are not subject to mass migration.
  • the solvents used can be easily recovered and can be used for a wide variety of purposes.
  • the products obtained are particularly stable and are not subject to discoloration.
  • the thermal stress on the substrates is eliminated in the method according to the invention. It is therefore possible to use more sensitive substrates than before. Changes in the used Nonwoven materials due to the ionizing effect of the electron beams were not found.
  • the shortest treatment time with low space requirements of the installation required for the process according to the invention is obtained if at least the removal of the solvent and the electron radiation of the substrate - if appropriate also the impregnation or coating with the solvent or with a solution of impregnation and solvent - are preferred continuously running substrate strip is carried out in successive operations.
  • the invention relates to a device for carrying out the method according to the invention, which is characterized in that the device (C) for removing the solvent and the device (D) for irradiating the substrate strip freed from the solvent are combined to form a common structural unit .
  • multi-part - housing assembly A is a supply or storage chamber or station for a material strip or substrate to be treated f, z.
  • B. a roll of a nonwoven or paper filter material wound onto a supply roll 10, B an immersion bath for soaking the substrate with an impregnating agent dissolved in a solvent or, if the material tape f is already coated with impregnating agent, with the solvent,
  • C a chamber for removing the solvent again using one or more nozzles 11,
  • D a radiation housing part containing the radiation device 12 with electron accelerator 13, scanner 14 and radiation channel 15 and E an outlet chamber or station for the treated material or substrate band f.
  • the material strip f running off the supply roll 10 at a certain speed is continuously passed through the housing parts or chambers or stations A to E.
  • the substrate is first of all exposed to the radiation-crosslinkable impregnating agent, e.g. B. an acrylic resin.
  • the function of the solvent is to enable the impregnating agent to penetrate into the substrate and thus to fulfill a transport function for the impregnating agent.
  • the further impregnated substrate in the chamber C - optionally after passing through a drip zone - by blowing using the nozzles 11, z. B. hot air nozzles, which can be supplied by a fan arranged in or on the housing assembly, again freed from a solvent. It can therefore immediately afterwards by using an inert gas, e.g. B. nitrogen, filled radiation channel 15 of the radiation housing part D, in which the impregnating agent is crosslinked by electron radiation and the substrate is thereby hardened and stiffened.
  • an inert gas e.g. B. nitrogen
  • Electron irradiation with an acceleration voltage of-150 to 200 kV has proven to be particularly economical for the aforementioned purpose.
  • large-area irradiation with a beam region widened in the running direction and fanned out in the scanner 14 is provided.
  • an irradiation time of about 0.05 to 0.5 sec a running speed of the material band f of z. B. 30 to 60 m / sec can be achieved.
  • This radiation is generally sufficient to penetrate with a cross-linking of z. B. to achieve 120 to 160 g / m 2 in the impregnated layer.
  • Simple paths of the substrate strip f through the chambers B, C and E are shown in the schematic drawing. Additional routes can be used to extend these paths as required.
  • the invention is also not necessarily limited to the fact that the material or substrate tape is first soaked or coated with the impregnating agent using a solvent in immersion bath B or in another suitable application device. If the material or substrate tape that is wound onto the supply roll 10 or that is supplied in some other way is already externally coated with an impregnating agent, the immersion bath B may need only contain the required solvent. If the tape is already fed in a state in which it has already been treated with a dissolved impregnating agent, the immersion bath B can also be omitted entirely. A and / or B can also form part of the common housing assembly.
  • a filter paper was treated under the following conditions:
  • a product which can be used as a filter material and has no discoloration is obtained.
  • the times for dipping, draining, and evaporating are laboratory values that can be shortened in industrial practice.

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  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Filtering Materials (AREA)
  • Reinforced Plastic Materials (AREA)

Claims (16)

1. Procédé pour la préparation de matériaux filtrants pour filtres à huile et à air pour véhicules à moteur, par imprégnation d'un substrat de papier ou de nappe avec une résine et/ou monomère et durcissement ultérieur du substrat, caractérisé en ce que l'on imprègne le substrat avec une solution ou une dispersion d'au moins une résine et/ou monomère durcissable sous l'effet de rayons électroniques, qui contient une concentration de 1 à 50% en poids de résine et/ou de monomère, rapportée au poids de la solution ou de la dispersion, puis que l'on élimine le solvant et ensuite que l'on provoque le durcissement par irradation électronique.
2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise des résines et/ou des monomères à base d'esters de l'acide acrylique et/ou de l'acide méthacrylique avec des polyols.
3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que l'on utilise une solution ou une dispersion ayant une concentration de 10 à 50 en poids de résine et/ou de monomère, rapportée au poids de la solution ou de la dispersion.
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le substrat est irradié par des électrons libres accélérés, grâce auxquels est obtenue une profondeur de pénétration du rayonnement correspondant au moins, d'une manière approchée, à l'épaisseur de la bande des substrat.
5. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on travaille avec une dose d'irradiation électronique de 0,1 à 16 Mrad, et de préférence de 1 à 10 Mrad.
6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la largeur de l'irradiation est adaptable à la largeur de la bande de substrat - en particulier pour une utilisation efficace de l'énergie - par focalisation des rayons électroniques.
7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'irradiation de la bande de nappe - en particulier pour l'adaption à différents mécanismes de réaction chimique du substrat - est réalisée à l'aide d'une irradiation ou d'une efficacité de rayonnement élargie. dans le sens de déplacement de la bande.
8. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'enlèvement de solvant et l'irradiation sont effectués en des postes de travail immédiatement successifs pour une bande de substrat passant à travers ces deux postes de travail.
9. Procédé selon la revendication 8, caractérisé en ce que l'imprégnation ou l'enduction de la bande de substrat sont, elles aussi, effectuées avec le solvant ou avec l'agent d'imprégnation et solvant dans une suite d'opérations continues avec l'élimination du solvant et l'irradiation, pour la bande de substrat passant par tous ces postes de travail.
10. Procédé selon l'une des revendications précédentes, caractérisé en ce que le solvant est éliminé l'aide d'un soufflage du substrat par un courant d'air ou de gaz, par exemple un courant d'air chaud.
11. Procédé selon l'une des revendications précédentes, caractérisé en ce que le solvant éliminé du substrat est envoyé à une autre utilisation.
12. Appareil pour la mise en oeuvre du procédé selon l'une des revendications précédentes, caractérisé en ce que l'appareil (C) destiné à l'élimination du solvant et l'appareil (D) destiné à l'irradiation de la bande de substrat débarrassée du solvant sont combinées en un ensemble commun du point de vue de la construction.
13. Appareil selon la revendication 12, caractérisé en ce que l'ensemble commun du point de vue de la construction englobe aussi l'appareil (B) destiné à l'imprégnation ou à l'enduction du substrat par le solvant ou par l'agent d'imprégnation et de dissolution.
14. Appareil selon la revendication 12 ou 13, caractérisé par des moyens de guidage, par lesquels la bande de substrat (f), en marche, est amenée d'un poste d'amenée ou d'alimentation (10) - éventuellement à travers un bain de trempage (B) ou un appareil d'enduction correspondant - à l'appareil (C) pour élimination du solvant, et ensuite à l'appareil (D) pour irradiation.
15. Appareil selon l'une des revendications 12 à 14, caractérisé en ce que l'élimination du solvant sont prévues des buses (11) pour soufflage de la bande de substrat (f) à l'aide de jets d'air ou de gaz.
16. Appareil selon l'une des revendications 12 à 15, caractérisé en ce que l'appareil présente un accélérateur d'électrons (13), un système de déviation des rayons électroniques (14) pour deux directions perpendiculaires l'une à l'autre (dans le sens de la marche et perpendiculairement au sens de la marche du substrat) et une fenêtre de sortie des rayons électroniques (fenêtre de Lenard) pour une dispersion en éventail de la bande de substrat.
EP80105000A 1979-08-22 1980-08-22 Procédé pour la préparation de matériaux pour filtre Expired EP0024703B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105000T ATE3072T1 (de) 1979-08-22 1980-08-22 Verfahren und vorrichtung zur herstellung von filtermaterialien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2933998A DE2933998C2 (de) 1979-08-22 1979-08-22 Verfahren und Vorrichtung zur Herstellung eines imprägnierten Papier- oder Vliessubstrats
DE2933998 1979-08-22

Publications (3)

Publication Number Publication Date
EP0024703A1 EP0024703A1 (fr) 1981-03-11
EP0024703B1 true EP0024703B1 (fr) 1983-04-13
EP0024703B2 EP0024703B2 (fr) 1986-07-30

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EP80105000A Expired EP0024703B2 (fr) 1979-08-22 1980-08-22 Procédé pour la préparation de matériaux pour filtre

Country Status (7)

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EP (1) EP0024703B2 (fr)
JP (1) JPS5663097A (fr)
AT (1) ATE3072T1 (fr)
BR (1) BR8005295A (fr)
DE (1) DE2933998C2 (fr)
FI (1) FI66942C (fr)
YU (1) YU205780A (fr)

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DE3020333C2 (de) * 1980-05-29 1983-12-29 MD-Verwaltungsgesellschaft Nicolaus & Co-GmbH & Co KG, 8000 München Verfahren zur Herstellung von porösem Papier
IE56391B1 (en) * 1984-03-05 1991-07-17 British Library Board Treatment of archival material by graft polymerisation with monomer
GB2180248B (en) * 1985-09-12 1989-11-29 British Library The Treatment of archival material by graft polymerisation with monomers
DE3711807A1 (de) * 1987-04-08 1988-10-27 Bausch & Co Viktor Verfahren zum impraegnieren von flaechigen faserstoffen
DE60135834D1 (de) 2001-06-08 2008-10-30 Procter & Gamble Cellulosfasern enthaltend strahlungsaktivierbare Harzverbindungen
DE102005032395A1 (de) * 2005-07-12 2007-01-25 Mahle International Gmbh Filtermedium für technische Anwendungen und Verfahren seiner Herstellung
DE102007019946A1 (de) * 2007-04-27 2008-10-30 Elringklinger Ag Flachdichtung und Verfahren zur Herstellung einer Flachdichtung
WO2009043110A1 (fr) * 2007-10-05 2009-04-09 Filsen Pty Ltd Procédé pour fabriquer un matériau en feuille
US7867358B2 (en) * 2008-04-30 2011-01-11 Xyleco, Inc. Paper products and methods and systems for manufacturing such products
AU2015215953B2 (en) * 2008-10-03 2016-11-17 Filsen Pty Ltd Method for manufacturing sheet material
EP2350386A4 (fr) * 2008-10-03 2015-08-12 Filsen Pty Ltd Procédé pour fabriquer un matériau en feuille

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BE520401A (fr) * 1952-06-03
BE606332A (fr) * 1959-04-01 1900-01-01
SE356469B (fr) * 1969-06-13 1973-05-28 Conservatome
GB1347679A (en) * 1970-10-09 1974-02-27 Berger Jenson & Nicholson Ltd Cross-linking polymers
FR2241384B1 (fr) * 1973-05-30 1976-06-11 Commissariat Energie Atomique
US4091167A (en) * 1973-09-21 1978-05-23 Rengo Co., Ltd. Method for preparing paper board having improved wet compression strength

Also Published As

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DE2933998C2 (de) 1987-05-27
DE2933998A1 (de) 1981-03-12
JPS5663097A (en) 1981-05-29
FI66942C (fi) 1984-12-10
FI802612A7 (fi) 1981-02-23
ATE3072T1 (de) 1983-04-15
EP0024703A1 (fr) 1981-03-11
YU205780A (en) 1983-02-28
BR8005295A (pt) 1981-03-04
EP0024703B2 (fr) 1986-07-30
FI66942B (fi) 1984-08-31

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