DE1142395B - Foam tape for insulation purposes in electrical engineering, especially for cables, or in refrigeration engineering - Google Patents

Foam tape for insulation purposes in electrical engineering, especially for cables, or in refrigeration engineering

Info

Publication number
DE1142395B
DE1142395B DES74804A DES0074804A DE1142395B DE 1142395 B DE1142395 B DE 1142395B DE S74804 A DES74804 A DE S74804A DE S0074804 A DES0074804 A DE S0074804A DE 1142395 B DE1142395 B DE 1142395B
Authority
DE
Germany
Prior art keywords
engineering
cables
tape
foam tape
foam
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
DES74804A
Other languages
German (de)
Inventor
Dr Otto Cords
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.)
SUEDDEUTSCHE KABELWERKE
Original Assignee
SUEDDEUTSCHE KABELWERKE
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 SUEDDEUTSCHE KABELWERKE filed Critical SUEDDEUTSCHE KABELWERKE
Priority to DES74804A priority Critical patent/DE1142395B/en
Priority to DES78119A priority patent/DE1213019B/en
Priority to FR903136A priority patent/FR1335135A/en
Priority to NL280788A priority patent/NL280788A/en
Publication of DE1142395B publication Critical patent/DE1142395B/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/027—Bands, cords, strips or the like for helically winding around a cylindrical object
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/002—Inhomogeneous material in general
    • H01B3/006—Other inhomogeneous material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0233—Cables with a predominant gas dielectric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0063—Cutting longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Laminated Bodies (AREA)
  • Insulating Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Aus Schaumstoff bestehendes Band für Isolierzwecke in der Elektrotechnik, insbesondere für Kabel, oder in der Kältetechnik Die Erfindung bezieht sich auf ein aus Schaumstoff bestehendes Band, das auf dem elektrischen Gebiet oder auch in der Kältetechnik Anwendung findet. Die Vorteile des Schaumstoffes sind sowohl in der Technik der Kabelfertigung als auch zur Ummantelung für Rohre und andere Gegenstände bekannt. In beiden Fällen ist die isolierende Wirkung von Schaumstoff dadurch gewährleistet, daß der Raumanteil der feinverteilten, geschlossenen, luft- oder gasgefüllten Zellen zu dem des festen Baustoffes, der die einzelnen Zellen umschließt, möglichst groß ist. Um den Schaumstoff wie eine Papierbandisolierung auf den elektrischen Leiter bzw. die Leiter aufzubringen, wird er unter anderem in Band- oder Folienform aufgesponnen. Wenn ein Schaumstoffband hierfür geeignet sein soll, muß es biegsam sein, ohne zu reißen. Foam tape for insulating purposes in electrical engineering, especially for cables, or in refrigeration technology. The invention relates to a foam tape that is used in the electrical field or also is used in refrigeration technology. The advantages of foam are both in the technology of cable production as well as for sheathing for pipes and others Objects known. In both cases the insulating effect of foam is this ensures that the space share of the finely divided, closed, air- or gas-filled cells to that of the solid building material that makes up the individual cells encloses, is as large as possible. Around the foam like paper tape insulation to apply to the electrical conductor or conductors, he will, among other things spun in tape or film form. If a foam tape is suitable for this to be, it must be flexible without tearing.

Die erforderliche Zugfestigkeit wurde bekanntlich dadurch erreicht, daß das Schaumstoffband durch Isolierfolien, die als Träger dienen, verstärkt wird. Beide Stoffe werden in diesem Falle miteinander verklebt.As is known, the required tensile strength was achieved by that the foam tape is reinforced by insulating films that serve as a carrier. In this case, both fabrics are glued together.

Es ist inzwischen aber auch schon gelungen, aufgeschäumte Polystyrolfolien, die eine Dielektrizitätskonstante von etwa 1,15 und einen dielektrischen Verlustfaktor in der Größenordnung von 10-4 oder niedriger aufweisen, zu fertigen. Sie zeichnen sich durch eine verhältnismäßig hohe Zugfestigkeit in ihrer Längsrichtung aus. Diese Folien sind verhältnismäßig dünn. Ihre Dicke beträgt etwa 0,1 bis 0,5 mm. Die Verwendung solcher, in passende Breite geschnittenen Polystyrol-Schaumfolien in einer Kabelisolierung hat jedoch Nachteile. In the meantime, however, it has also been possible to produce foamed polystyrene films, which has a dielectric constant of about 1.15 and a dielectric loss factor on the order of 10-4 or less. they draw is characterized by a relatively high tensile strength in its longitudinal direction. These Foils are relatively thin. Their thickness is about 0.1 to 0.5 mm. The usage such polystyrene foam sheets cut to the appropriate width in a cable insulation however, it has disadvantages.

Die angeschnittenen Kanten der Folien reißen leicht ein. weil sie eine viel zu geringe Zugfestigkeit in der Querrichtung gegenüber der Längsrichtung haben. Der Grund für die verschiedenartige mechanische Festigkeit der Folien in der Längs- und Querrichtung ist in dem sogenannten Kalandereffekt begründet, der sich offenbar bei der Herstellung nicht vermeiden läßt. The cut edges of the foils tear easily. because they a much too low tensile strength in the transverse direction compared to the longitudinal direction to have. The reason for the different mechanical strengths of the foils in the longitudinal and transverse direction is due to the so-called calender effect, the evidently cannot be avoided during production.

Ferner ist die absolute Zugfestigkeit der Folien wegen ihrer geringen Dicke und der häufig erforderlichen kleinen Verarbeitungsbreite für die Beanspruchungen des Spinnvorganges nicht ausreichend. Furthermore, the absolute tensile strength of the films is low because of their low Thickness and the often required small processing width for the stresses the spinning process is insufficient.

Außerdem ist wegen der geringen Dicke der Folie auch die Zunahme der Isolierschicht je Lage entsprechend klein, so daß bei größeren Isolierstücken eine ganze Anzahl Folienlagen übereinander aufgebracht werden müssen. In addition, because of the small thickness of the film, there is also the increase the insulating layer per layer is correspondingly small, so that with larger insulating pieces a number of layers of film must be applied one on top of the other.

Um diesen Mängeln zu begegnen, wird gemäß der Erfindung das Schaumstoffband in seiner Längsrichtung einfach oder mehrfach gefaltet und an der offenen Längskante durch Verschweißen geschlossen. In order to address these deficiencies, the foam tape is according to the invention Folded one or more times in its longitudinal direction and on the open longitudinal edge closed by welding.

Hierdurch wird erreicht, daß an den Kanten des gefalteten Bandes die Einreißgefahr beseitigt ist. Weiterhin ist infolge der übereinanderliegenden Folien die absolute Zugfestigkeit um ein Mehrfaches bei entsprechend größerer Zunahme der Isolierstärke erhöht.This ensures that the edges of the folded tape The risk of tearing has been eliminated. Furthermore, as a result of the overlapping foils the absolute tensile strength several times over with a correspondingly larger increase in Insulation strength increased.

Ein solches Band kann aus einer Folie einfach gefaltet sein, wobei seine eine Längskante die Faltkante ist und die andere aus den zwei miteinander verschweißten Schnittkanten der Folie besteht. Bei einer mehrfachen Faltung der Folie zu einem Band sind an einer Längskante zwei Faltkanten miteinander verschweißt. Das nach der Erfindung gefaltete und geschweißte Band weist ferner noch den Vorteil auf, daß es zwischen den Faltlagen größere zusätzliche Lufträume enthält, wodurch eine Herabsetzung der resultierenden Dielektrizitätskonstante der Isolierung eintritt.Such a band can simply be folded from a film, with one of its long edges is the folding edge and the other of the two together welded cut edges of the film. If the Foil to form a tape, two folding edges are welded together on one longitudinal edge. The band folded and welded according to the invention also has the advantage on that it contains larger additional air spaces between the folded layers, whereby a reduction in the resulting dielectric constant of the insulation occurs.

Die Abbildungen veranschaulichen Ausführungsbeispiele der gefalteten Schaumstoffbänder. The figures illustrate embodiments of the folded Foam tapes.

Entsprechend der Darstellung nach Abb. 1 ist eine geschnittene Polystyrolschaumstoff-Folie, wie a zeigt, einfach gefaltet. Die verbleibende offene Kante des Bandes ist nach b durch Verschweißen geschlossen, was beispielsweise durch das Vorbeiziehen vor einer Wärmequelle geschehen kann. As shown in Fig. 1, a cut polystyrene foam sheet is as a shows, simply folded. The remaining open edge of the tape is behind b closed by welding, for example by pulling past a heat source can happen.

Einfach gefaltete Bänder dieser Art kommen besonders dann zur Anwendung, wenn die Dicke der Isolierschicht verhältnismäßig gering sein soll, wie dies beispielsweise bei den Adern für Fernmeldekabel häufig der Fall ist. Wenn dagegen eine größere Isolierstärke erforderlich wird, ist es zweckmäßig, mehrfach gefaltete Bänder zu verwenden, wie sie beispielsweise in der Abb. 2 in vierfacher Faltung veranschaulicht sind. Simply folded tapes of this type are particularly used if the thickness of the insulating layer is to be relatively small, as is the case for example is often the case with the cores for telecommunication cables. If, on the other hand, a larger one Insulation thickness If necessary, it is useful to fold it several times To use tapes, as shown for example in Fig. 2 in four folds are illustrated.

Eine geschnittene Polystyrol-Schaumfolie, die z. B. A cut polystyrene foam sheet, e.g. B.

70 mm breit und nur 0,12 min dick ist, wird im gleichen Abstand von ihren Längskanten nach innen, wie dies c zeigt, umgebogen. Dieser Streifen wird nochmals nach d in der Mitte in gleicher Weise gefaltet, so daß nunmehr vier übereinanderliegende Folienlagen ein Band bilden. Die sich bei der Faltung ergebende offene Längskante wird nach e geschlossen.70 mm wide and only 0.12 min thick is spaced at the same distance from their long edges bent inwards, as c shows. This strip will folded again in the same way after d in the same way, so that there are now four on top of each other Foil layers form a tape. The open longitudinal edge resulting from the folding is closed after e.

Wenn z. B. bei einem Hochfrequenz-Koaxialkabel, das eine Schaumstoffisolierung von 8 auf 20 mm Durchmesser erhalten soll, fünfzig Lagen aus einer einfachen Schaumstoff-Folie mit einer Stärke von (),12 mm benötigt werden, so gelingt es nach der Erfindung, das Schaumstoffband vierfach gefaltet mit etwa zwölf Lagen übereinander auszuführen. If z. B. in a high-frequency coaxial cable that has a foam insulation from 8 to 20 mm in diameter, fifty layers of a simple foam sheet with a strength of (), 12 mm are required, it is possible according to the invention the foam tape should be folded four times with about twelve layers on top of each other.

Faltbänder nach Art der Erfindung sind ferner für andere Isolierzwecke, wie sie z. B. in der Kältetechnik auftreten, brauchbar, wenn es sich z. B. darum handelt, Rohre mit Isoliermaterial zu umgeben. Folding tapes according to the invention are also used for other insulating purposes, how they z. B. occur in refrigeration, useful when it is z. B. therefore is about surrounding pipes with insulating material.

Claims (1)

PATENTANSPRUCH: Aus Schaumstoff bestehendes Band für Isolierzwecke in der Elektrotechnik. insbesondere für Kabel, oder in der Kältetechnik. dadurch gekennzeichnet, daß das Band in seiner Längsrichtung einfach oder mehrfach gefaltet und an der offenen Längskante durch Verschweißen geschlossen ist. PATENT CLAIM: Foam tape for insulation purposes in electrical engineering. especially for cables, or in refrigeration technology. through this characterized in that the tape is folded one or more times in its longitudinal direction and is closed at the open longitudinal edge by welding.
DES74804A 1961-07-13 1961-07-13 Foam tape for insulation purposes in electrical engineering, especially for cables, or in refrigeration engineering Pending DE1142395B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DES74804A DE1142395B (en) 1961-07-13 1961-07-13 Foam tape for insulation purposes in electrical engineering, especially for cables, or in refrigeration engineering
DES78119A DE1213019B (en) 1961-07-13 1962-02-20 Foam tape for insulating purposes in electrical engineering, especially for cables or in refrigeration engineering
FR903136A FR1335135A (en) 1961-07-13 1962-07-06 Foam tape for insulation in electrical engineering, particularly for cables, or in refrigeration technology
NL280788A NL280788A (en) 1961-07-13 1962-07-11 Foam tape for insulation purposes in electrical engineering, especially for cables and in refrigeration technology

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES74804A DE1142395B (en) 1961-07-13 1961-07-13 Foam tape for insulation purposes in electrical engineering, especially for cables, or in refrigeration engineering
DES78119A DE1213019B (en) 1961-07-13 1962-02-20 Foam tape for insulating purposes in electrical engineering, especially for cables or in refrigeration engineering

Publications (1)

Publication Number Publication Date
DE1142395B true DE1142395B (en) 1963-01-17

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
DES74804A Pending DE1142395B (en) 1961-07-13 1961-07-13 Foam tape for insulation purposes in electrical engineering, especially for cables, or in refrigeration engineering
DES78119A Pending DE1213019B (en) 1961-07-13 1962-02-20 Foam tape for insulating purposes in electrical engineering, especially for cables or in refrigeration engineering

Family Applications After (1)

Application Number Title Priority Date Filing Date
DES78119A Pending DE1213019B (en) 1961-07-13 1962-02-20 Foam tape for insulating purposes in electrical engineering, especially for cables or in refrigeration engineering

Country Status (1)

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DE (2) DE1142395B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5816526A (en) * 1995-02-15 1998-10-06 Bartelmuss; Klaus Tear strip for severing a moving paper web

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DE840598C (en) * 1950-12-24 1952-06-03 Draegerwerk Ag Hot air welding machine
DE1032041B (en) * 1953-02-26 1958-06-12 Smith & Sons Ltd S Magnetic particle clutch or brake
DE1082041B (en) * 1956-12-22 1960-05-19 Oesterreichische Kunststoff Pr Device for welding the butt joints of thermoplastic floor coverings

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US5816526A (en) * 1995-02-15 1998-10-06 Bartelmuss; Klaus Tear strip for severing a moving paper web

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