WO1980001684A1 - Sealing of hollow glass fibres by means of molten materials - Google Patents

Sealing of hollow glass fibres by means of molten materials Download PDF

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Publication number
WO1980001684A1
WO1980001684A1 PCT/DE1980/000013 DE8000013W WO8001684A1 WO 1980001684 A1 WO1980001684 A1 WO 1980001684A1 DE 8000013 W DE8000013 W DE 8000013W WO 8001684 A1 WO8001684 A1 WO 8001684A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow glass
fiber
wall material
hollow
aerosol
Prior art date
Application number
PCT/DE1980/000013
Other languages
German (de)
French (fr)
Inventor
H Nussbaum
Original Assignee
H Nussbaum
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 H Nussbaum filed Critical H Nussbaum
Publication of WO1980001684A1 publication Critical patent/WO1980001684A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/075—Manufacture of non-optical fibres or filaments consisting of different sorts of glass or characterised by shape, e.g. undulated fibres
    • C03B37/0756—Hollow fibres

Definitions

  • Hollow glass threads are a well-known semi-finished product, for example to produce lightweight laminates by embedding them in synthetic resin.
  • Today, these products still suffer from the lack of absorbing water and other things if they are not sealed with considerable effort on their side areas.
  • sealing is not considered satisfactory in every case. All injuries to the sealing surface of a product, which can also be caused by aging, lead to an opening of the fiber, so that water can in turn penetrate there. Emptying the fiber is practically impossible.
  • This invention improves the sealing (sealing) of the hollow glass fiber by using glass or other mineral substances for the bulkheads, which are known to completely prevent penetration.
  • the process of installing the bulkheads is also cheaper in several ways.
  • the partitioning is carried out during the spinning process. On the one hand, there is no additional effort (time), on the other hand, no significant increase in investment costs is necessary.
  • the hollow glass fiber is given more or less regular spacing of bulkheads made of mineral material, primarily glass, which, as is also known from glass, completely prevents the penetration of water, other liquids and gases, in particular water gas.
  • the invention solves the problem of introducing these bulkheads into the fiber.
  • an aerosol under pressure of 10 to 500 mm water column
  • the supporting gas in which the wall material is suspended, that is, in which its rate of descent (with aerosol at rest) is reduced.
  • the support gas can continuously drive the wall material into the liquid gas cone of the spinning system.
  • the diameter of the wall material is adapted to the inside diameter of the hollow fiber. Today, for example, this is from 0.04 to 0.25 mm.
  • the aerosol maintains its temperature so low that on the one hand the wall material (such as the glass balls) remains in the desired state, on the other hand the properties of the aerosol are not undesirably changed.
  • a cannula is used as a feed line for driving in the wall material (1), the maximum inside diameter of which is not significantly larger than that of the hollow thread to be manufactured (2).
  • the cannula is insulated against heating (3) j because it has to penetrate the warm zones of the spinning system.
  • an insulating tube with low thermal conductivity is to be used for this purpose, in which a double-walled, metallic tube (4) is stored.
  • the cannula (1) is inserted on the axis of this arrangement, so that a cooling liquid or a cooling gas (5) can take over the heat transfer.
  • the sketch shows this technique, which is known per se; to understand the process.
  • the materials driving into the liquid glass cone absorb the necessary heat to connect to the wall of the thread, possibly supported by a downstream heating section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

Hollow glass fibres laminated materials suffer, still nowadays, from the fault of containing water and other substances. The sealing processes used up to flow still show defects which are eliminated by the invention. The hollow glass fibre receives sealing walls during the spinning operation which takes place with a protection gas comprised of an aerosol wherein the material of the tight wall is in suspension. For this purpose, small hollow glass balls are used, of which the diameter corresponds to that of the fibres. The aerosol is directed by a cooled nozzle of the hollow fibre inner diameter, so that the current speed corresponds approximately to the spinning speed (about 1 to 1.5 m/s).

Description

" Abschottung von Hohlglasfasern mittels eingeschmolzener Materialien ""Partitioning of hollow glass fibers using melted materials"
Stand der TechnikState of the art
Hohle Glasfäden sind ein bekanntes Halbzeug, um beispielsweise durch Einbettung in Kunstharz leichte Laminate herzustellen. Heute leiden diese Produkte noch unter dem Mangel, Wasser und anderes aufzunehmen, wenn man diese nicht mit erheblichem Aufwand an ihren Seitenbereichen abdichtet. Jedoch wird das Abdichten nicht als in jedem Fall befriedigend angesehen. Alle Verletzungen der Abdichtfläche eines Produktes, die auch durch Alterung bedingt sein können, führen nämlich zu einer Öffnung der Faser, so daß dort wiederum Wasser eindringen kann. Die Faser zu entleeren ist praktisch unmöglich.Hollow glass threads are a well-known semi-finished product, for example to produce lightweight laminates by embedding them in synthetic resin. Today, these products still suffer from the lack of absorbing water and other things if they are not sealed with considerable effort on their side areas. However, sealing is not considered satisfactory in every case. All injuries to the sealing surface of a product, which can also be caused by aging, lead to an opening of the fiber, so that water can in turn penetrate there. Emptying the fiber is practically impossible.
Zwar ist es eine Frage der Anforderungsbedingungen an das Produkt, ob man Verletzungen über eine vorgesehene Lebenszeit des Produktes in Kauf nehmen will. Bei hoher Anforderung an die Lebensdauer, wie zum Beispiel im Flugzeugbau, im Verkehrswesen Land und See, nicht zuletzt bei Geräten und Waffen der Streitkräfte, fordert man für viele Zwecke eine dicht abgeschottete Faser.It is a question of the requirements for the product, whether you want to accept injuries over the intended lifetime of the product. When high demands are placed on the service life, for example in aircraft construction, in land and sea transport, and not least in the case of equipment and weapons from the armed forces, a densely isolated fiber is required for many purposes.
Zwei Möglichkeiten der Abschottung sind bereits versucht worden. Man führte eine Stückelung der Faser durch und dichtete sie anschließend an den Enden ab. Außerdem wurde versucht, die Faser mit einem schäumenden Kunststoff zu füllen. Während die erst genannte Methode eine befriedigende Dichheit erzielte, war die zweite wegen der Wassergasdiffusion noch mangelhaft. Beide Methoden bieten dazu den Nachteil, daß die Abschottung erst nach der Faserproduktion mittels aufwendiger Verfahren vorgenommen werden muß.Two options for foreclosure have already been tried. The fibers were diced and then sealed at the ends. Attempts have also been made to fill the fiber with a foaming plastic. While the first method achieved a satisfactory tightness, the second method was due to the diffusion of water gas still poor. Both methods have the disadvantage that the partitioning only has to be carried out after the fiber production by means of complex processes.
Verbesserung durch die ErfindungImprovement through the invention
Diese Erfindung verbessert die Abschottung ( Abdichtung ) der Hohlglasfaser dadurch, daß sie Glas oder andere mineralische Stoffe für die .Schottwände einsetzt, die bekanntermaßen eine Durchdringung vollkommen verhindern. Auch der Vorgang zur Einbringung der Schottwände ist in mehrfacher Hinsicht günstiger. Die Abschottung wird nämlich während des Spinnvorganges durchgeführt. Einerseits entfällt also ein zusätzlicher Aufwand (Zeit), andererseits ist keine erhebliche Erhöhung der Investitionskosten nötig.This invention improves the sealing (sealing) of the hollow glass fiber by using glass or other mineral substances for the bulkheads, which are known to completely prevent penetration. The process of installing the bulkheads is also cheaper in several ways. The partitioning is carried out during the spinning process. On the one hand, there is no additional effort (time), on the other hand, no significant increase in investment costs is necessary.
Beschreibung der ErfindungDescription of the invention
Die Hohlglasfaser erhält entsprechend der Erfindung in mehr oder weniger regelmäßigem Abstand dicht schließende Schottwände aus mineralischem Material, vornehmlich Glas, das, wie auch von Glas bekannt, das Eindringen von Wasser, anderen Flüssigkeiten, und von Gasen, insbesondere Wassergas, vollständig verhindert. Die Erfindung löst die Aufgabe, diese Schottwände in die Faser einzubringen. Zu diesem Zweck wird als Stützgas ein Aerosol (unter Druck von 10 bis 500 mm Wassersäule) benutzt, in welchem das Wandmaterial schwebt, das heißt, in welchem seine Sinkgeschwindigkeit ( bei ruhendem Aerosol ) herabgesetzt ist. Dadurch kann das Stützgas das Wandmaterial kontinuierlich in den Flüssiggaskegel der Spinnanlage eintreiben. Der Durchmesser des Wandmaterials ist dem Innendurchmesser der Hohlfaser angepaßt. Dieser liegt heute beispielsweise von 0,04 bis 0,25 mm . Das Aerosol behält bis dich vor dem Eintritt in den Glaskegel seine Temperatur so tief, daß einerseits das Wandmaterial ( etwa die Glaskugeln) im gewünschten Zustand bleibt, andererseits die Eigenschaften des Aerosols nicht unerwünscht verändert werden. Dazu wird als Zuleitung für das Eintreiben des Wandmaterials eine Kanüle eingesetzt ( 1 ) , deren Innendurchmesser im Maximum nicht wesentlich größer ist als der des zu fertigenden Hohlfadens (2). Auf diese Weise wird eine hohe Transportgeschwindigkeit er zwungen, vergleichbar mit der Abzugsgeschwindigkeit des Spinnvorganges. Die Kanüle wird gegen Erwärmung isoliert (3)j weil sie die Warmzonen der Spinnanlage durchdringen muß. Dazu ist bekanntermaßen ein Isolierrohr mit geringer Wärmeleitfähigkeit zu verwenden, in das ein doppelwandiges, metallisches Rohr (4 ) gelagert wird. Auf der Achse dieser Anordnung wird die Kanüle (1) eingesetzt, so daß eine Kühlflüssigkeit oder ein Kühlgas (5) den Wärmetranspoxrt übernehmen kann. Die Skizze zeigt diese an sich bekannte Technik; zum Verständnis des Vorganges. Die in den Flüssigglaskegel eintreibenden Materialien nehmen die nötige Wärme auf, um sich mit der Wand des Fadens zu verbinden, eventuell unterstützt durch eine nachgeschaltete Wärmestrecke . According to the invention, the hollow glass fiber is given more or less regular spacing of bulkheads made of mineral material, primarily glass, which, as is also known from glass, completely prevents the penetration of water, other liquids and gases, in particular water gas. The invention solves the problem of introducing these bulkheads into the fiber. For this purpose, an aerosol (under pressure of 10 to 500 mm water column) is used as the supporting gas, in which the wall material is suspended, that is, in which its rate of descent (with aerosol at rest) is reduced. As a result, the support gas can continuously drive the wall material into the liquid gas cone of the spinning system. The diameter of the wall material is adapted to the inside diameter of the hollow fiber. Today, for example, this is from 0.04 to 0.25 mm. Until you enter the glass cone, the aerosol maintains its temperature so low that on the one hand the wall material (such as the glass balls) remains in the desired state, on the other hand the properties of the aerosol are not undesirably changed. For this purpose, a cannula is used as a feed line for driving in the wall material (1), the maximum inside diameter of which is not significantly larger than that of the hollow thread to be manufactured (2). In this way, a high transport speed is forced, comparable to the take-off speed of the spinning process. The cannula is insulated against heating (3) j because it has to penetrate the warm zones of the spinning system. As is known, an insulating tube with low thermal conductivity is to be used for this purpose, in which a double-walled, metallic tube (4) is stored. The cannula (1) is inserted on the axis of this arrangement, so that a cooling liquid or a cooling gas (5) can take over the heat transfer. The sketch shows this technique, which is known per se; to understand the process. The materials driving into the liquid glass cone absorb the necessary heat to connect to the wall of the thread, possibly supported by a downstream heating section.

Claims

AnsprücheExpectations
Hohlglasfasern, hergestellt aus Gläsern nach den ansich bekannten Ziehverfahren, dadurch gekennzeichnet, daß sie in mehr oder weniger regelmäßigem Abstand dicht schließende Wände aus mineralischem Material, vorzugsweise aus Glas haben, das vorzugsweise von hohlen und oder massiven Glaskugeln herrührt, deren Durchmesser der Faser angepaßt ist, wobei das Wand Material schwebeleicht über das Stüzgas, das in einer Kanüle geführt wird, in die Faser beim Ziehvorgang eingetrieben wird, wo es die Wärme aufnimmt, sodaß es mit der Faserwand verbunden wird.Hollow glass fibers, made from glasses according to the known drawing processes, characterized in that they have tightly closing walls made of mineral material, preferably of glass, which comes preferably from hollow and or solid glass balls, the diameter of which is adapted to the fiber, at more or less regular intervals , wherein the wall material is floated over the support gas, which is guided in a cannula, into the fiber during the drawing process, where it absorbs the heat, so that it is connected to the fiber wall.
Hohlglasfasern nach Anspruch 1 dadurch, gekennzeichnet, daß das Wandmaterial aus körnigem , eventuell staubartigem Material besteht, dessen Korngröße dem Durchmesser der Faser angepaßt ist.Hollow glass fibers according to claim 1, characterized in that the wall material consists of granular, possibly dust-like material, the grain size of which is adapted to the diameter of the fiber.
Hohlglasfasern nach Anspruch 1 und 2 dadurch gekennzeichnet,daß. das Stützgas ein Aerosol ist, welches ein spezifisches Gewicht. hat, das dem Raumgewicht des Wandmaterials angepaßt ist, um dessen Schwebung zu unterstützen und / oder ein Aerosol ist, das eine elektrostatische Aufladung hat, die die Schwebung des Wandmaterials unterstützt. Hohlglasfasern nach Anspruch 1 bis 3 dadurch gekennzeichnet, daß das Wandmaterial einen niedrigeren Erweichungspunkt ( eine niedrigere Erweichungstemperatur, eine niedrigere Zähigkeit, eine niedrigere Poise-Zahl ) hat, als das Glas der Faser, um die Ausbeulung der Hohlglasfaser klein zu halten.Hollow glass fibers according to claim 1 and 2, characterized in that. the support gas is an aerosol, which has a specific weight. has, which is adapted to the density of the wall material to support its beating and / or is an aerosol that has an electrostatic charge that supports the beating of the wall material. Hollow glass fibers according to claims 1 to 3, characterized in that the wall material has a lower softening point (a lower softening temperature, a lower toughness, a lower Poise number) than the glass of the fiber in order to keep the bulge of the hollow glass fiber small.
Hohlglasfasern nach Anspruch 1 bis 4 dadurch gekennzeichnet, daß das Wandmaterial einen gleichen oder höheren Erweichungspunkt ( eine höhere Erweichungstemperatur, eine höhere Zähigkeit, eine höhere Poisezahl ) hat als das Glas der Faser, um eine gewünschte Ausbeulung der Hohlglasfaser zu erzielen. Hollow glass fibers according to claims 1 to 4, characterized in that the wall material has an equal or higher softening point (a higher softening temperature, a higher toughness, a higher Poise number) than the glass of the fiber in order to achieve a desired bulging of the hollow glass fiber.
PCT/DE1980/000013 1979-02-08 1980-02-04 Sealing of hollow glass fibres by means of molten materials WO1980001684A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792904705 DE2904705A1 (en) 1979-02-08 1979-02-08 FORWARDING OF HOLLOW GLASS FIBERS BY MELTING IN MELTED MATERIALS
DE2904705 1979-02-08

Publications (1)

Publication Number Publication Date
WO1980001684A1 true WO1980001684A1 (en) 1980-08-21

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PCT/DE1980/000013 WO1980001684A1 (en) 1979-02-08 1980-02-04 Sealing of hollow glass fibres by means of molten materials

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EP (1) EP0024400A1 (en)
DE (1) DE2904705A1 (en)
WO (1) WO1980001684A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698200A1 (en) * 1992-11-13 1994-05-20 Dominitz Jacques Charles Manufacturing method for message carrier object.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3918360A1 (en) * 1988-06-11 1990-02-08 Bundesrep Deutschland Spinneret and process for producing filamentous compartmented hollow fibres
DE4308010A1 (en) * 1993-03-13 1994-09-15 Schott Glaswerke Process for the production of thickness-modified continuous fibres from glass, in particular thickness-modified reinforcing fibres for fibre-reinforced composite materials

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269459A (en) * 1937-08-11 1942-01-13 Owens Corning Fiberglass Corp Tubular fiber
US2571457A (en) * 1950-10-23 1951-10-16 Ladisch Rolf Karl Method of spinning filaments
US2612679A (en) * 1950-10-23 1952-10-07 Ladisch Rolf Karl Filaments containing fillers
US3421873A (en) * 1966-03-17 1969-01-14 Jerome A Burgman Method and apparatus for producing an intermittently hollow glass filament
FR1572274A (en) * 1968-03-14 1969-06-27
FR2176050A1 (en) * 1972-03-15 1973-10-26 Timm Hermann Filled hollow transparent filament - filler changes with temp (reversibly) from colourless to coloured or to a different colou
DE2452600A1 (en) * 1974-11-06 1976-05-13 Helmut Lehle Tubes with metallised bores, esp optical fibres - obtd by feeding metal wire into the bore when drawing the fibre
FR2334638A1 (en) * 1975-12-12 1977-07-08 Sandwich Profil Gmbh METHOD AND DEVICE FOR MANUFACTURING CAPILLARIES IN THE FORM OF WIRES

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE121318C (en) * 1900-05-13 1901-06-19
DE1205660B (en) * 1962-08-25 1965-11-25 Siemens Ag Process for drawing glass tubes directly from a glass melt
DE2652690A1 (en) * 1976-11-19 1978-05-24 Sandwich Profil Gmbh Fibrous light guide capillary formation - by extrusion of molten glass under gas pressure through capillary nozzle, with internal gas pressure to maintain uniform wall thickness

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269459A (en) * 1937-08-11 1942-01-13 Owens Corning Fiberglass Corp Tubular fiber
US2571457A (en) * 1950-10-23 1951-10-16 Ladisch Rolf Karl Method of spinning filaments
US2612679A (en) * 1950-10-23 1952-10-07 Ladisch Rolf Karl Filaments containing fillers
US3421873A (en) * 1966-03-17 1969-01-14 Jerome A Burgman Method and apparatus for producing an intermittently hollow glass filament
FR1572274A (en) * 1968-03-14 1969-06-27
FR2176050A1 (en) * 1972-03-15 1973-10-26 Timm Hermann Filled hollow transparent filament - filler changes with temp (reversibly) from colourless to coloured or to a different colou
DE2452600A1 (en) * 1974-11-06 1976-05-13 Helmut Lehle Tubes with metallised bores, esp optical fibres - obtd by feeding metal wire into the bore when drawing the fibre
FR2334638A1 (en) * 1975-12-12 1977-07-08 Sandwich Profil Gmbh METHOD AND DEVICE FOR MANUFACTURING CAPILLARIES IN THE FORM OF WIRES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698200A1 (en) * 1992-11-13 1994-05-20 Dominitz Jacques Charles Manufacturing method for message carrier object.
WO1994011316A1 (en) * 1992-11-13 1994-05-26 Jacques Charles Dominitz Process for the manufacture of an object displaying a message
US5895512A (en) * 1992-11-13 1999-04-20 Dominitz; Jacques Charles Process for the manufacture of an object displaying a message

Also Published As

Publication number Publication date
EP0024400A1 (en) 1981-03-11
DE2904705A1 (en) 1981-01-29
DE2904705C2 (en) 1989-10-12

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