CH409845A - Process for the production of a non-combustible filter mat - Google Patents

Process for the production of a non-combustible filter mat

Info

Publication number
CH409845A
CH409845A CH596361A CH596361A CH409845A CH 409845 A CH409845 A CH 409845A CH 596361 A CH596361 A CH 596361A CH 596361 A CH596361 A CH 596361A CH 409845 A CH409845 A CH 409845A
Authority
CH
Switzerland
Prior art keywords
fibers
production
fleece
denier
combustible
Prior art date
Application number
CH596361A
Other languages
German (de)
Inventor
Robert Dr Schabert
Original Assignee
Freudenberg Carl
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 Freudenberg Carl filed Critical Freudenberg Carl
Priority to CH596361A priority Critical patent/CH409845A/en
Publication of CH409845A publication Critical patent/CH409845A/en

Links

Classifications

    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/552Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving by applying solvents or auxiliary agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/14Other self-supporting filtering material ; Other filtering material
    • B01D39/16Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04Additives and treatments of the filtering material
    • B01D2239/0464Impregnants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/08Special characteristics of binders
    • B01D2239/086Binders between particles or fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nonwoven Fabrics (AREA)

Description

       

  
 



  Verfahren zur Herstellung einer nichtbrennbaren Filtermatte
Die Erfindung betrifft ein Verfahren zur Herstellung von voluminösen feintitrigen nichtbrennbaren Filtermatten aus brennbaren Fasern.



   Die Filter- und Staubspeicherkapazität einer Filtermatte gegebener Dicke hängt u. a. auch von der Stärke der Fasern ab. Je feiner die Fasern, desto   Sgrös-    ser werden die entsprechenden Werte.



   Allerdings nimmt auch die Brennbarkeit einer   sol-    chen aus brennbaren Fasern bestehenden Matte mit abnehmender Faserstärke zu,   da - bei    gleichem Gewicht   - feintitrige    Fasern eine grössere Oberfläche als grobtitrige aufweisen.



   Es liegt natürlich nahe, dieses lose Faservlies in üblicher Weise durch Imprägnieren mit einer wässrigen Lösung eines bekannten   Flammsohutzmittels    unbrennbar zu machen. Diese Arbeitsweise verbietet sich, da in diesem Falle das voluminöse Gebilde auf etwa den zehnten Teil seines ursprünglichen Volumens zusam  menklatscht.    Die dabei resultierende Fasermasse ist zwar unbrennbar, jedoch keine Filtermatte mehr.



   Man hat bereits versucht, dieses Zusammenklatschen beim Nachimprägnieren durch Anwendung des   Flammschutzmittels    in Form einer Suspension oder Dispersion in einem organischen Lösungsmittel zu vermeiden. Dieses Verfahren ist zwar bei Fasern mit einem Titer über 20 den, nicht jedoch bei feintitrigen Fasern (3 bis etwa 12-15 den) möglich.



   Es wurde nun gefunden, dass man die eben genannten Nachteile bei der Herstellung voluminöser, feintitriger,   mchtbrennbarer    Filtermatten aus brennbaren Fasern beseitigen kann. Das entsprechende Verfahren, dadurch gekennzeichnet, dass ein loses Vlies mit Fasern eines den-Grades von etwa 3 bis etwa 12-15 durch Verschweissen der Einzelfasern an den Berührungspunkten vorverfestigt und anschliessend mit einer etwa   8% eigen    Lösung oder Dispersion von PVC/Sb203 in einem organischen Lösungsmittel im Verhältnis von etwa 5 : 3 bis zu einer Nassaufnahme von etwa 100 bis 300%   naclhimprägniert    und dann getrocknet wird.



   Die Vorverfestigung des feintitrigen Faservlieses   ge-    schieht nach an sich bekannten Methoden. Liegen thermoplastische Fasern vor, so genügt eine Hitzebehandlung. Dabei erweichen die Fasern und verschweissen sich an den Berührungspunkten. Bei nicht thermoplastischen Fasern ist eine Hitzebehandlung natürlich unwirksam. Durch Schmälzen mit beispielsweise Ben   zol-sulfosäure-butyl-amid erreicht t man jedoch ebenfalls    in vielen   Fällen    ein Erweichen und   anschliessendes    Verschmelzen der Fasern an den Kreuzungspunkten.



   Wenn das   PVC-Sb2O3-haltige    organische Lösungsmittel die Fasern anlösen   kann,    dann wird eine zusätzliche Verfestigung der Fasermatte erreicht.



      sseispiel 1   
Ein Faservlies, 300 g/m2, bestehend aus   lOOto      21/2    Acetat-Faser mit einem Titer von 3 den, vorge  schmälzt mit 10% 100/o Benzol-sulfosäure-butyl-arnid wird    zur Glättung der Oberflächen durch ein Presswalzwerk mit einer Temperatur von 1050 geführt, anschliessend in einem Wärmekanal verfestigt (dieses Vlies kann zu  sätzllich    mit einem   Deckschaumstrich    versehen sein).



  Das so verfestigte Vlies wird in einem auf Distanz eingestellten Walzenpaar mit folgender Mischung
5 Teile Polyvinylchlorid
3 Teile Antimontrioxyd
92 Teile Trichloräthylen so imprägniert, dass nach dem Trocknen eine Ge  wichtszunahme    von ca. 10% erfolgt. Man erhält eine nichtbrennbare Fasermatte, die in ihren Eigenschaften sich von der nichtgetränkten kaum unterscheidet.  



   Beispiel 2
Die vorverfestigte Fasermatte wird unter gleichen Bedingungen mit folgender Tränkmischung getränkt:
5 Teile Polyvinylchlorid
3 Teile Antimontrioxyd
20 Teile Methylenchlorid
72 Teile Trichloräthylen.



   Man erhält eine Fasermatte, die an Standfestigkeit gegenüber der nicht   nachgetränkten    Fasermatte wesentlich zugenommen hat (die Ursache liegt darin, dass das Methylenchlorid sich gegenüber der   Acetatfaser    nicht inert verhält).   



  
 



  Process for the production of a non-combustible filter mat
The invention relates to a process for the production of voluminous, fine-titer, non-combustible filter mats from combustible fibers.



   The filter and dust storage capacity of a filter mat of a given thickness depends u. a. also depends on the strength of the fibers. The finer the fibers, the greater the corresponding values.



   However, the flammability of such a mat made of flammable fibers also increases with decreasing fiber thickness, since - with the same weight - fine-denier fibers have a larger surface than coarse-denominated fibers.



   Of course, it makes sense to make this loose fiber fleece incombustible in the usual way by impregnating it with an aqueous solution of a known flame retardant. This mode of operation is prohibited, since in this case the voluminous structure menklatscht to about a tenth of its original volume. The resulting fiber mass is non-flammable, but no longer a filter mat.



   Attempts have already been made to avoid this clapping during re-impregnation by using the flame retardant in the form of a suspension or dispersion in an organic solvent. This method is possible for fibers with a denier of more than 20 denier, but not for fine denier fibers (3 to about 12-15 denier).



   It has now been found that the above-mentioned disadvantages in the production of voluminous, fine-denier, non-combustible filter mats from combustible fibers can be eliminated. The corresponding method, characterized in that a loose fleece with fibers of a den degree from about 3 to about 12-15 is pre-consolidated by welding the individual fibers at the contact points and then with an approximately 8% proprietary solution or dispersion of PVC / Sb203 in one organic solvent in a ratio of about 5: 3 up to a wet pickup of about 100 to 300% and then dried.



   The pre-consolidation of the fine-denier fiber fleece takes place according to methods known per se. If thermoplastic fibers are present, heat treatment is sufficient. The fibers soften and weld at the points of contact. With non-thermoplastic fibers, heat treatment is of course ineffective. By melting with, for example, benzene sulfonic acid butyl amide, however, in many cases the fibers are also softened and then melted at the points of intersection.



   If the organic solvent containing PVC-Sb2O3 can dissolve the fibers, an additional solidification of the fiber mat is achieved.



      Example 1
A fiber fleece, 300 g / m2, consisting of 100 to 21/2 acetate fiber with a titer of 3 den, pre-melted with 10% 100 / o benzene-sulfonic acid-butyl-arnide is used to smooth the surfaces through a press roll mill with a temperature from 1050, then solidified in a heat channel (this fleece can also be provided with a top foam layer).



  The bonded fleece is then mixed in a pair of rollers set at a distance
5 parts of polyvinyl chloride
3 parts of antimony trioxide
92 parts of trichlorethylene so impregnated that after drying there is an increase in weight of approx. 10%. A non-combustible fiber mat is obtained which hardly differs in its properties from the non-soaked one.



   Example 2
The pre-consolidated fiber mat is impregnated with the following impregnation mixture under the same conditions:
5 parts of polyvinyl chloride
3 parts of antimony trioxide
20 parts of methylene chloride
72 parts of trichlorethylene.



   The result is a fiber mat that has significantly increased its stability compared to the non-saturated fiber mat (the reason is that the methylene chloride is not inert towards the acetate fiber).


    

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung voluminöser, feintitriger, nichtbrennbarer Filtermatten aus brennbaren Fasern, dadurch gekennzeichnet, dass ein loses Vlies mit Fasern eines den-Grades von etwa 3 bis etwa 12-15 durch Verschweissen der Einzelfasern an den Berührungspunkten vorverfestigt und anschliessend mit t einer etwa 8 Sc-igen Lösung oder Dispersion von PVC/SbwO3 in einem organischen Lösungsmittel im Verhältnis von etwa 5 : 3 bis zu einer Nassaufnahme von etwa 100-300'3t0 nachimprägniert und dann betrocknet wird. PATENT CLAIM Process for the production of voluminous, fine-denier, non-flammable filter mats from flammable fibers, characterized in that a loose fleece with fibers of a den-grade of about 3 to about 12-15 is pre-consolidated by welding the individual fibers at the points of contact and then with a about 8 Sc -igen solution or dispersion of PVC / SbwO3 in an organic solvent in a ratio of about 5: 3 up to a wet absorption of about 100-300'3t0 and then dried. UNTERANSPRUCH Verfahren gemäss Patentanspruch, dadurch gekennzeichnet, dass ein solches organisches Lösungsmittel verwendet wird, dass die Fasern des vorverfestigten Vlieses anquellen oder anlösen kann. SUBClaim Method according to claim, characterized in that such an organic solvent is used that the fibers of the pre-bonded fleece can swell or dissolve.
CH596361A 1961-05-23 1961-05-23 Process for the production of a non-combustible filter mat CH409845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH596361A CH409845A (en) 1961-05-23 1961-05-23 Process for the production of a non-combustible filter mat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH596361A CH409845A (en) 1961-05-23 1961-05-23 Process for the production of a non-combustible filter mat

Publications (1)

Publication Number Publication Date
CH409845A true CH409845A (en) 1966-03-31

Family

ID=4302191

Family Applications (1)

Application Number Title Priority Date Filing Date
CH596361A CH409845A (en) 1961-05-23 1961-05-23 Process for the production of a non-combustible filter mat

Country Status (1)

Country Link
CH (1) CH409845A (en)

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