DE1164818B - Process for the production of paper or sheet-like structures from synthetic fibers - Google Patents

Process for the production of paper or sheet-like structures from synthetic fibers

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Publication number
DE1164818B
DE1164818B DEG34052A DEG0034052A DE1164818B DE 1164818 B DE1164818 B DE 1164818B DE G34052 A DEG34052 A DE G34052A DE G0034052 A DEG0034052 A DE G0034052A DE 1164818 B DE1164818 B DE 1164818B
Authority
DE
Germany
Prior art keywords
fibers
layer
lubricant
condensable
esterifiable
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.)
Pending
Application number
DEG34052A
Other languages
German (de)
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.)
Battelle Institut eV
Original Assignee
Battelle Institut eV
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
Priority to NL135829D priority Critical patent/NL135829C/xx
Priority to BE624231D priority patent/BE624231A/xx
Priority to NL285026D priority patent/NL285026A/xx
Priority to DEG33481A priority patent/DE1159257B/en
Application filed by Battelle Institut eV filed Critical Battelle Institut eV
Priority to DEG34052A priority patent/DE1164818B/en
Priority to DEG34836A priority patent/DE1176993B/en
Priority to DEG35413A priority patent/DE1176994B/en
Priority to DE1962B0069295 priority patent/DE1215502C2/en
Priority to AT838162A priority patent/AT251402B/en
Priority to LU42620D priority patent/LU42620A1/xx
Priority to GB41366/62A priority patent/GB1009120A/en
Priority to US234673A priority patent/US3200033A/en
Priority to DK473062AA priority patent/DK115449B/en
Priority to CH1282862A priority patent/CH435965A/en
Priority to FR914269A priority patent/FR1338724A/en
Priority to DEB73276A priority patent/DE1229376B/en
Publication of DE1164818B publication Critical patent/DE1164818B/en
Priority to NL646408415A priority patent/NL146235B/en
Priority to FR985014A priority patent/FR86300E/en
Priority to GB34336/64A priority patent/GB1044925A/en
Priority to US391281A priority patent/US3227608A/en
Priority to LU46832D priority patent/LU46832A1/xx
Priority to BE652341D priority patent/BE652341A/xx
Priority to CH1117364A priority patent/CH462611A/en
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • 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
    • D21H17/08—Isocyanates
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/53—Polyethers; Polyesters
    • 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
    • D21H17/60—Waxes
    • 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
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
    • D21H5/1272—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of fibres which can be physically or chemically modified during or after web formation
    • D21H5/129—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of fibres which can be physically or chemically modified during or after web formation by thermal treatment
    • 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
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
    • D21H5/20—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of organic non-cellulosic fibres too short for spinning, with or without cellulose fibres

Description

Verfahren zur Herstellung von Papier bzw. flächenartigen Gebilden aus Synthesefasern In der Patentanmeldung G 33481 VI b/55 f (deutsche Auslegeschrift 1159 257) ist ein Verfahren beschrieben, um Papier und nichtgewebte Stoffe auf Papiermaschinen herzustellen. Bei diesem Verfahren werden ausschließlich die Faserberührungspunkte miteinander verbunden, wobei die Fasern zuerst mit einem harzartigen Material ummantelt und anschließend mit einem weiteren Film eines Additionspolymeren überschichtet werden. Zu Beginn der Härtungsreaktion werden beide Filme kurzzeitig flüssig, ohne sich ineinander zu lösen. Dabei gleitet der obere Film auf dem unteren bis zu einem Knotenpunkt und zieht sich zu einem Tropfen zusammen, während der untere Film aus dem Tropfen gedrängt wird und allein auf der Faseroberfläche verbleibt. Im Tropfen erfolgt dann die Verklebung durch Aushärtung. Nach der Abkühlung kann der harzartige Überzug ausgewaschen werden. Die frei liegenden Faseranteile im Vlies sind dann nicht mehr bedeckt.Process for the production of paper or sheetlike structures from synthetic fibers In the patent application G 33481 VI b / 55 f (German Auslegeschrift 1159 257) a process is described for producing paper and nonwoven fabrics on paper machines. In this process, only the fiber contact points are connected to one another, whereby the fibers are first coated with a resinous material and then covered with a further film of an addition polymer. At the beginning of the hardening reaction, both films become liquid for a short time without dissolving into one another. The upper film slides on the lower one to a junction and contracts to a drop, while the lower film is pushed out of the drop and remains on the fiber surface alone. In the drop, the bonding then takes place by curing. After cooling, the resinous coating can be washed out. The exposed fiber parts in the fleece are then no longer covered.

Die Fasern, die ursprünglich zumeist in Büscheln vorliegen, werden in Wasser - dem z. B. Harzseifen zugegeben sind - aufgeschlagen. Anschließend werden sie zentrifugiert, um den Überschuß an Harzseife zu entfernen, und dann getrocknet. Die Fasern sind nunmehr mit einer Harzseifenhaut überzogen. Um die Fasern weiterbehandeln zu können, müssen sie erneut aufgeschlagen und getrocknet werden. Dann werden sie in eine Lösung von beispielsweise Isocyanat und Polyester in Aceton und Methylglykolacetat eingebracht, abgeschleudert und getrocknet. Sie sind damit mit einer weiteren Haut, und zwar von Isoeyanat und Polyester umgeben. Die Fasern werden dann wiederum in Wasser aufgeschlagen, aufgeschlämmt und der Stoffbrei auf einer üblichen Papiermaschine zum Vlies verarbeitet.The fibers, which originally are mostly in tufts, are in water - the z. B. resin soaps are added - whipped. Then be centrifuged to remove the excess resin soap and then dried. The fibers are now covered with a resin soap skin. To further treat the fibers To be able to do so, they have to be opened and dried again. Then they will in a solution of, for example, isocyanate and polyester in acetone and methyl glycol acetate introduced, spun off and dried. You are with another skin, namely surrounded by isoeyanate and polyester. The fibers are then turned in Water whipped up, slurried and the pulp on a conventional paper machine processed into fleece.

Es wurde nun gefunden, daß der Weg der Faserpräparation wesentlich vereinfacht werden kann. An Stelle der Umhüllung mit einer Harzseife können die trockenen Faserbüschel in einem Weichmacher aufgeschlagen werden, der mit dem flüssigen Additionspolymeren unverträglich ist. Der Weichmacher dringt teilweise in die Fasern ein bzw. lagert sich an der Oberfläche an. Um den Überschuß zu entfernen, wird abgeschleudert, so daß nur 4 bis 601/o Weichmacher an der Faser bleiben. Der Weichmacher übernimmt die Funktion der Harzseife, wobei sich folgende Vorteile ergeben: Das Aufschlagen und Präparieren der Faser mit Weichmacher ist in einem Arbeitsgang durchführbar; nach dem Abschleudern des überschusses kleben die Fasern nicht aneinander und können ohne erneutes Aufschlagen weiterverarbeitet werden; der Weichmacher braucht nicht ausgewaschen zu werden.It has now been found that the fiber preparation route is essential can be simplified. Instead of being wrapped with a resin soap, the dry tufts of fibers are whipped in a softener that is mixed with the liquid Addition polymers is incompatible. The plasticizer partially penetrates the fibers or accumulates on the surface. To remove the excess, it is spun off, so that only 4 to 601 / o plasticizer remain on the fiber. The plasticizer takes over the function of the resin soap, with the following advantages: The whipping and preparing the fiber with plasticizer can be carried out in one operation; After throwing off the excess, the fibers do not stick to one another and can can be further processed without being whipped again; the plasticizer does not need to be washed out.

Ferner wurde weiterhin gefunden, daß man den additionspolymeren Kleber zum Verbinden der Berührungspunkte der Fasern nicht in Form einer Umhüllung der Fasern aufbringen muß, sondern diesen besser im unterkühlten und pulverisierten Zustand dem Faserbrei unmittelbar vor dem Aufbringen auf die Siebpartie zugibt. Hierzu wird zunächst Isoeyanat in Polyester gelöst, ohne daß Lösungsmittel zur Anwendung kommen. Das Mischprodukt hat plastilinartige Konsistenz und wird bei etwa 0° C Unterkühlung völlig klebfrei und hart. Dieses harte Material wird pulverisiert und dem Faserbrei zugegeben. Der durch die Aufschlämmung der Fasern in Wasser gebildete Faserbrei hat eine Feststoffkonzentration von 0,01 bis @0,1 °/a. Das pulverförmige Additionspolymere verteilt sich zwischen den Fasern. Nach der Vliesbildung und Entzug der Hauptmenge des Wassers auf der Siebpartie der Papiermaschine wird das verteilte Additionspolymere bei leichter Temperaturerhöhung wieder klebend und hält .die Fasern im Vlies so stark zusammen, daß dieses unter Eigenzug in die Trockenpartie übergeführt werden kann. Dort erfolgt dann ein kurzer Schmelzvorgang, wobei die Tropfen des nunmehr flüssigen Additionspolymeren auf dem Weichmacher, der mit Wasser nicht mischbar ist, bis zu den Knotenpunkten gleiten. Die Verbindung der Fasern erfolgt sodann auch hier durch Aushärtung.It has also been found that the addition polymer adhesive for connecting the contact points of the fibers does not have to be applied in the form of a sheathing of the fibers, but is better added to the pulp in the supercooled and pulverized state immediately before application to the wire section. For this purpose, isocyanate is first dissolved in polyester without using solvents. The mixed product has a plasticine-like consistency and becomes completely tack-free and hard at about 0 ° C undercooling. This hard material is pulverized and added to the pulp. The fiber pulp formed by the suspension of the fibers in water has a solids concentration of 0.01 to 0.1 ° / a. The powdery addition polymer is distributed between the fibers. After the formation of the fleece and removal of most of the water on the wire section of the paper machine, the addition polymer becomes sticky again with a slight increase in temperature and holds the fibers in the fleece together so strongly that it can be transferred into the dryer section under its own tension. A short melting process then takes place there, with the drops of the now liquid addition polymer sliding on the plasticizer, which is immiscible with water, up to the nodal points. Here, too, the fibers are connected by curing.

An Stelle von Isoeyanat und Polyester können auch andere Additionspolymere oder kondensationsfähige Produkte zur Anwendung kommen.Instead of isoeyanate and polyester, other addition polymers can also be used or condensable products are used.

Die beispielsweise genannten Isocyanate - im Handel bekannt als Desmodur AP stabil - sind verkappt; d. h., die Isocyanatgruppen sind stabilisiert, z. B. durch Phenol oder Alkohol. Die Phenol- und Alkoholgruppen werden erst bei höherer Temperatur (100° C) abgespalten und geben die Isocyanatgruppen zum weiteren Reagieren frei. Die OH-gruppenhaltigen Polyester sind im Handel als Desmophen bekannt.The isocyanates mentioned for example - known in the trade as Desmodur AP stable - are capped; d. i.e., the isocyanate groups are stabilized, e.g. B. by phenol or alcohol. The phenol and alcohol groups only become higher when they are higher temperature (100 ° C) split off and give the isocyanate groups to further react freely. The polyesters containing OH groups are commercially available as desmophene known.

Unter Synthesefasern werden von dem Erfinder sämtliche Fasern verstanden, die durch die Art ihrer Herstellung aus einer Schmelze, durch Pressen oder Ziehen durch eine Spinndüse und Behandeln der so gewonnenen Fäden in Luft, Fällbädern, Heizzonen usw. eine glatte, nichtfibrillierte Oberfläche haben, wobei es sich sowohl um gestreckte, gereckte, gekräuselte oder Hohlfasern handeln kann. Als Beispiele für solche Synthesefasern seien angeführt regenerierte Zellulose aus Viskose oder Kupferoxydammoniak, Polyamide, wie sie durch Kondensation von Hexylmethylendiaminsalz mit Adipinsäure (Nylon 66) oder f-Cyprolactam (Nylon 6) entstehen, Polyester aus zweibasischen Säuren, z. B. Terephthalsäure bzw. Isophthalsäure, und di- oder mehrwertigen Alkoholen (z. B. Diolen, Terylen oder Dacron), Polyvinyle aus z. B. Vinylchlorid, Vinylazetat, Styrol, Vinylidenchlorid und deren Mischpolymerisaten, Polyacryle aus Acrylnitril (z. B. Dralon) bzw. Mischpolymerisate aus Vinylverbindungen und/oder Styrol und Acrylnitril, weiterhin Polyolefine, z. B. Polyäthylene oder Polypropylene. Auch Glasfasern können in Betracht kommen.The inventor understands synthetic fibers to mean all fibers by the way they are produced from a melt, by pressing or drawing through a spinneret and treating the threads obtained in this way in air, felling baths, Heating zones etc. have a smooth, non-fibrillated surface, being both can be stretched, drawn, crimped or hollow fibers. As examples for such synthetic fibers, regenerated cellulose made from viscose or Copper oxide ammonia, polyamides as produced by the condensation of hexylmethylenediamine salt with adipic acid (nylon 66) or f-cyprolactam (nylon 6), polyester is made dibasic acids, e.g. B. terephthalic acid or isophthalic acid, and di- or polyvalent Alcohols (e.g. diols, terylene or Dacron), polyvinyls from e.g. B. vinyl chloride, Vinyl acetate, styrene, vinylidene chloride and their copolymers, polyacrylics Acrylonitrile (e.g. Dralon) or copolymers of vinyl compounds and / or Styrene and acrylonitrile, furthermore polyolefins, e.g. B. polyethylene or polypropylene. Glass fibers can also be considered.

Als weitere Beispiele der zur Verwendung gelangenden Glykolphthalate seien genannt Äthylenglykolphthalat und Diäthylglykolphthalat. Beispiel Polyesterfasern werden in Dimethylglykolphthalat aufgeschlagen und abgeschleudert, wobei an den Fasern 4 bis 6 °/o des Weichmachers haftenbleiben. Anschließend werden die Fasern in Wasser aufgeschlämmt, bei einer Stoffkonzentration von 0,05 %, und dem Stoffbrei 50% - berechnet auf Trockenfaser - pulverisierter Kleber aus Desmodur AP stabil und Desmophen zugegeben. Der Stoffbrei wird dann auf der Siebpartie einer üblichen Papiermaschine zum Vlies verarbeitet. Durch das zwangläufige Erwärmen wird das Additionspolymere aus Isocyanat und Polyester leicht klebend und verleiht dem Vlies die notwendige Initial-Naßfestigkeit, um es in die Trockenpartie der Papiermaschine überführen zu können, in der die endgültige Aushärtung erfolgt.As further examples of the glycol phthalates used Ethylene glycol phthalate and diethyl glycol phthalate may be mentioned. Example polyester fibers are whipped in dimethylglycol phthalate and centrifuged, with the Fibers 4 to 6% of the plasticizer adhere. Then the fibers slurried in water, at a concentration of 0.05%, and the pulp 50% - calculated on dry fiber - powdered adhesive made from Desmodur AP stable and desmophen added. The pulp is then on the wire section of a usual Paper machine processed into fleece. Due to the compulsory heating, the addition polymer becomes made of isocyanate and polyester, slightly adhesive and gives the fleece the necessary Initial wet strength to transfer it to the dryer section of the paper machine to be able to, in which the final curing takes place.

Claims (2)

Patentansprüche: 1. Verfahren zur Herstellung von Papieren bzw. flächenartigen Gebilden aus Synthesefasern, wobei die Fasern mit einer additionspolymerisierbaren, kondensierbaren oder veresterungsfähigen Schicht überzogen, auf üblichen Papiermaschinen zu einem Vlies verarbeitet und durch thermische Aushärtung der Schicht an den Kreuzungspunkten verbunden und wobei vor dem Aufbringen der polymerisierbaren, kondensierbaren oder veresterungsfähigen Schicht mit einer für diese verflüssigte Schicht als Gleitmittel dienenden, bei 80 bis 120° C flüssigen Zwischenschicht, besonders aus einem Natur- oder Kunstharz, oder einem Silikonöl, nach Patentanmeldung G 33481 VIb/55f (deutsche Auslegeschrift 1l59257) überzogen werden, dadurch gekennzeichnet, daß als Gleitmittel ein wasserunlösliches Alkylglykolphthalat verwendet wird, mit diesem die Fasern aufgeschlagen werden und dabei das Gleitmittel auf diese aufgezogen wird. Claims: 1. Process for the production of papers or sheet-like Formed from synthetic fibers, the fibers with an addition polymerizable, condensable or esterifiable layer coated on conventional paper machines processed into a fleece and through thermal hardening of the layer at the crossing points connected and wherein prior to application of the polymerizable, condensable or esterifiable layer with a layer liquefied for this as a lubricant serving, at 80 to 120 ° C liquid intermediate layer, especially made of a natural or synthetic resin, or a silicone oil, according to patent application G 33481 VIb / 55f (German Auslegeschrift 1159257) are coated, characterized in that as a lubricant a water-insoluble alkyl glycol phthalate is used with this the fibers be whipped and the lubricant is drawn onto them. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die polymerisierbare, kondensierbare oder veresterungsfähige Schicht durch Einarbeiten eines entsprechenden Pulvers in das mit dem Gleitmittel versehene Fasergemenge und durch Verflüssigung während der Aufheizung zum thermischen Aushärten gebildet wird.2. Procedure according to claim 1, characterized in that the polymerizable, condensable or esterifiable layer by incorporating an appropriate powder into the fiber mixture provided with the lubricant and by liquefaction during the Heating for thermal curing is formed.
DEG34052A 1961-11-02 1962-01-18 Process for the production of paper or sheet-like structures from synthetic fibers Pending DE1164818B (en)

Priority Applications (23)

Application Number Priority Date Filing Date Title
NL135829D NL135829C (en) 1961-11-02
BE624231D BE624231A (en) 1961-11-02
NL285026D NL285026A (en) 1961-11-02
DEG33481A DE1159257B (en) 1961-11-02 1961-11-02 Process for the production of paper or sheet-like structures from synthetic fibers
DEG34052A DE1164818B (en) 1961-11-02 1962-01-18 Process for the production of paper or sheet-like structures from synthetic fibers
DEG34836A DE1176993B (en) 1961-11-02 1962-04-27 Process for the manufacture of nonwoven fabrics from synthetic fibers
DEG35413A DE1176994B (en) 1961-11-02 1962-07-07 Process for the manufacture of nonwoven fabrics from synthetic fibers
DE1962B0069295 DE1215502C2 (en) 1961-11-02 1962-10-19 Process for the production of papers or sheet-like structures from synthetic fabric fibers
AT838162A AT251402B (en) 1962-01-18 1962-10-23 Process for the production of paper and non-woven fabrics on conventional paper machines
LU42620D LU42620A1 (en) 1961-11-02 1962-10-31
CH1282862A CH435965A (en) 1961-11-02 1962-11-01 Process for the production of synthetic papers or non-woven fabrics from at least partially synthetic fibers
GB41366/62A GB1009120A (en) 1961-11-02 1962-11-01 Method of making paper and non-woven materials
US234673A US3200033A (en) 1961-11-02 1962-11-01 Method of making paper and non-woven fabric from synthetic fibers
DK473062AA DK115449B (en) 1961-11-02 1962-11-01 Process for the production of paper or similar substances containing synthetic fibers.
FR914269A FR1338724A (en) 1961-11-02 1962-11-02 Process for the manufacture of paper and synthetic nonwoven products and products conforming or similar to those thus obtained
DEB73276A DE1229376B (en) 1961-11-02 1963-08-27 Process for the production of synthetic papers and non-woven fabrics from synthetic fibers
NL646408415A NL146235B (en) 1961-11-02 1964-07-23 PROCESS FOR THE MANUFACTURE OF NON-WOVEN FIBER FIBERS, ESPECIALLY PAPER, AS WELL AS SHEETS, PANELS, FIBER FIBERS OR PAPER, MADE BY APPLICATION OF THIS PROCESS.
FR985014A FR86300E (en) 1961-11-02 1964-08-12 Process for the manufacture of paper and synthetic nonwoven products and products conforming or similar to those thus obtained
US391281A US3227608A (en) 1961-11-02 1964-08-21 Manufacture of synthetic paper sheet
GB34336/64A GB1044925A (en) 1961-11-02 1964-08-21 Manufacture of papers and non-woven fabrics
LU46832D LU46832A1 (en) 1961-11-02 1964-08-26
BE652341D BE652341A (en) 1961-11-02 1964-08-26
CH1117364A CH462611A (en) 1961-11-02 1964-08-26 Process for the production of synthetic papers and non-woven fabrics from synthetic fibers

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DEG33481A DE1159257B (en) 1961-11-02 1961-11-02 Process for the production of paper or sheet-like structures from synthetic fibers
DEG34052A DE1164818B (en) 1961-11-02 1962-01-18 Process for the production of paper or sheet-like structures from synthetic fibers
DEG34836A DE1176993B (en) 1961-11-02 1962-04-27 Process for the manufacture of nonwoven fabrics from synthetic fibers
DEG35413A DE1176994B (en) 1961-11-02 1962-07-07 Process for the manufacture of nonwoven fabrics from synthetic fibers
DEB73276A DE1229376B (en) 1961-11-02 1963-08-27 Process for the production of synthetic papers and non-woven fabrics from synthetic fibers

Publications (1)

Publication Number Publication Date
DE1164818B true DE1164818B (en) 1964-03-05

Family

ID=27511925

Family Applications (5)

Application Number Title Priority Date Filing Date
DEG33481A Pending DE1159257B (en) 1961-11-02 1961-11-02 Process for the production of paper or sheet-like structures from synthetic fibers
DEG34052A Pending DE1164818B (en) 1961-11-02 1962-01-18 Process for the production of paper or sheet-like structures from synthetic fibers
DEG34836A Pending DE1176993B (en) 1961-11-02 1962-04-27 Process for the manufacture of nonwoven fabrics from synthetic fibers
DEG35413A Pending DE1176994B (en) 1961-11-02 1962-07-07 Process for the manufacture of nonwoven fabrics from synthetic fibers
DEB73276A Pending DE1229376B (en) 1961-11-02 1963-08-27 Process for the production of synthetic papers and non-woven fabrics from synthetic fibers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DEG33481A Pending DE1159257B (en) 1961-11-02 1961-11-02 Process for the production of paper or sheet-like structures from synthetic fibers

Family Applications After (3)

Application Number Title Priority Date Filing Date
DEG34836A Pending DE1176993B (en) 1961-11-02 1962-04-27 Process for the manufacture of nonwoven fabrics from synthetic fibers
DEG35413A Pending DE1176994B (en) 1961-11-02 1962-07-07 Process for the manufacture of nonwoven fabrics from synthetic fibers
DEB73276A Pending DE1229376B (en) 1961-11-02 1963-08-27 Process for the production of synthetic papers and non-woven fabrics from synthetic fibers

Country Status (8)

Country Link
US (2) US3200033A (en)
BE (2) BE652341A (en)
CH (1) CH435965A (en)
DE (5) DE1159257B (en)
DK (1) DK115449B (en)
GB (2) GB1009120A (en)
LU (2) LU42620A1 (en)
NL (3) NL146235B (en)

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US4701250A (en) * 1973-01-17 1987-10-20 Eltech Systems Corporation Dimensionally stable asbestos diaphragm coated foraminous cathode
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US3227608A (en) 1966-01-04
DE1176994B (en) 1964-08-27
CH435965A (en) 1967-05-15
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LU42620A1 (en) 1962-12-31
DK115449B (en) 1969-10-06
NL6408415A (en) 1965-03-01
DE1229376B (en) 1966-11-24
DE1159257B (en) 1963-12-12
DE1176993B (en) 1964-08-27
GB1044925A (en) 1966-10-05
NL135829C (en)
BE652341A (en) 1964-12-16
US3200033A (en) 1965-08-10
NL146235B (en) 1975-06-16
GB1009120A (en) 1965-11-03
LU46832A1 (en) 1964-10-26

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