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DE3929012A1 - Thermal shrinkage insulation tape - has thermally responsive layer sandwiched between cover and adhesive - Google Patents

Thermal shrinkage insulation tape - has thermally responsive layer sandwiched between cover and adhesive

Info

Publication number
DE3929012A1
DE3929012A1 DE3929012A DE3929012A DE3929012A1 DE 3929012 A1 DE3929012 A1 DE 3929012A1 DE 3929012 A DE3929012 A DE 3929012A DE 3929012 A DE3929012 A DE 3929012A DE 3929012 A1 DE3929012 A1 DE 3929012A1
Authority
DE
Germany
Prior art keywords
holes
heat
layer
film according
shrinkable
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.)
Withdrawn
Application number
DE3929012A
Other languages
German (de)
Inventor
Norbert Dr Wenzel
Helmut Dr Lindner
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.)
Philips Intellectual Property and Standards GmbH
Original Assignee
Philips Patentverwaltung GmbH
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 Philips Patentverwaltung GmbH filed Critical Philips Patentverwaltung GmbH
Priority to DE3929012A priority Critical patent/DE3929012A1/en
Publication of DE3929012A1 publication Critical patent/DE3929012A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/0616—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms layered or partially layered preforms, e.g. preforms with layers of adhesive or sealing compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/1806—Heat shrinkable sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207—Heat-activated adhesive
    • B32B2037/1215—Hot-melt adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/042—Punching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • B32B2307/736—Shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2398/00—Unspecified macromolecular compounds
    • B32B2398/20—Thermoplastics

Landscapes

  • Laminated Bodies (AREA)

Abstract

The tape or foil is produced that can be wound onto cable connections and is then subjected to heating to cause shrinkage and so produce a sealed covering. The tape has an inner layer (1) of thermally responsive material that shrinks when heated. On one side there is a cover material of thermoplastic material with a fibre filling. On the other side is an adhesive layer that responds when heat is applied. The inner layer is produced with a pattern of holes or slots produced in a pressing operation. This allows a physical connection between the outer layers. ADVANTAGE - Provides high strength foil for insulation.

Description

Die Erfindung bezieht sich auf eine wärmeschrumpfbare Folie mit einer durchlässigen wärmeschrumpfbaren Kern­ schicht und mindestens einer damit verbundenen geschlos­ senen Deckschicht, insbesondere für Kabelschrumpfmuffen.The invention relates to a heat shrinkable Foil with a permeable heat shrinkable core layer and at least one associated closed its top layer, especially for cable shrink sleeves.

Bei einer durch die GB-A 21 35 632 bekannten wärme­ schrumpfbaren Folie dieser Art besteht die wärmeschrumpf­ bare Kernschicht aus wärmeschrumpfbaren Längsfäden, welche mit Querfäden verwoben sind. Da die durchlässige gewebeartige wärmeschrumpfbare Kernschicht mit einer geschlossenen Deckschicht verbunden ist, ist die mehrschichtige wärmeschrumpfbare Folie insgesamt dicht.At a heat known from GB-A 21 35 632 shrinkable film of this type consists of heat shrink bare core layer made of heat-shrinkable longitudinal threads, which are interwoven with cross threads. Because the permeable fabric-like heat-shrinkable core layer with a closed top layer is the multilayer heat-shrinkable film overall tight.

Der Erfindung liegt die Aufgabe zugrunde, die wärme­ schrumpfbare Folie der eingangs genannten Art zu verein­ fachen.The invention is based, the heat shrinkable film of the type mentioned to combine fold.

Die Erfindung geht aus von der Erkenntnis, daß die eingangs erwähnte bekannte wärmeschrumpfbare Folie im Falle eines beispielsweise bei ungleichmäßiger Schrumpf­ erwärmung entstehenden Einrisses nicht weiterreißt. Ein Riß bleibt örtlich begrenzt. Dagegen neigt eine einfacher herstellbare geschlossene wärmeschrumpfbare Kernfolie zum Weiterreißen.The invention is based on the knowledge that the known heat shrinkable film mentioned in the introduction In the case of an uneven shrinkage, for example tearing caused by warming does not continue. A Crack remains localized. On the other hand, one tends to be easier producible closed heat shrinkable core film for Carry on.

Die Lösung der genannten Aufgabe gelingt dadurch, daß die wärmeschrumpfbare Kernschicht aus einer Kern-Folie besteht, in welche aus einer Folge von Löchern bestehende Lochreihen eingebracht sind. The solution to this problem is achieved in that the heat-shrinkable core layer made of a core film consists of a series of holes Rows of holes are introduced.  

Die für die Erfindung verwendete wärmeschrumpfbare Kern­ schicht erfordert nur einen unwesentlich größeren Herstellungsaufwand als eine geschlossene Folie. Anderer­ seits ergibt sich der überraschende Vorteil, daß ein Einriß beim Erreichen eines Loches stehenbleibt.The heat shrinkable core used for the invention layer only requires an insignificantly larger one Manufacturing effort as a closed film. Other on the one hand there is the surprising advantage that a Tear remains when a hole is reached.

Als weiteren Vorteil ermöglicht die Erfindung, daß das Material einer Deckschicht durch die Lochreihen auf gegen­ überliegende Deckschichten oder sonstige Schichten verbin­ dend durchgreifen kann.As a further advantage, the invention enables that Material of a cover layer through the rows of holes on against overlying cover layers or other layers can take hold.

In einfachster Weise können die Lochreihen als in Schrumpfrichtung aufeinanderfolgende Einschnitte ausgebil­ det sein.In the simplest way, the rows of holes as in Shrinking direction of successive incisions det be.

Ein Durchgriff des Materials einer Deckschicht wird durch Lochreihen ermöglicht, welche durch Stanzen hergestellt sind.The material of a cover layer is penetrated by Allows rows of holes made by punching are.

Eine hohe Festigkeit der erfindungsgemäßen Schrumpffolie ergibt sich, wenn die Löcher einer Lochreihe in Schrumpf­ richtung aufeinanderfolgen. Eine besonders gute Weiter­ reißfestigkeit erreicht man dadurch, daß die Löcher benachbarter Lochreihen gegeneinander versetzt sind.A high strength of the shrink film according to the invention results when the holes in a row of holes shrink follow direction. A particularly good next Tear resistance is achieved by the holes adjacent rows of holes are offset from each other.

Wenn die Löcher in Schrumpfrichtung länglich ausgebildet sind, ist der relative Querschnittsanteil der Löcher klein, so daß ein hoher Querschnittsanteil für die Schrumpfwirkung verfügbar ist.If the holes are elongated in the direction of shrinkage is the relative cross-sectional proportion of the holes small, so that a high cross section for the Shrinkage effect is available.

Die erfindungsgemäß vorgesehene wärmeschrumpfende Kern­ schicht kann einseitig oder beidseitig mit einer beim Schrumpfvorgang erweichenden Deckschicht versehen sein. Weiterhin können zusätzliche Schichten vorgesehen sein wie insbesondere eine dampfsperrende Aluminiumschicht, welche besonders vorteilhaft auf eine Trägerschicht aufgedampft sein kann.The heat-shrinkable core provided according to the invention layer can be on one or both sides with a Be shrinking softening cover layer. Additional layers can also be provided, such as in particular a vapor-blocking aluminum layer, which evaporated particularly advantageously onto a carrier layer can be.

Die Erfindung wird anhand der Beschreibung von in der Zeichnung dargestellten vorteilhaften Aufführungsbei­ spielen näher erläutert.The invention is based on the description of in the Advantageous performance shown in the drawing play explained in more detail.

Fig. 1 zeigt einen Querschnitt durch eine wärmeschrumpfbare Folie, bei welcher eine wärmeschrumpfbare Kernschicht zwischen zwei Deckschichten eingebettet ist. Fig. 1 shows a cross section through a heat-shrinkable film, in which a heat-shrinkable core layer is embedded between two cover layers.

Fig. 2 zeigt eine Aufsicht auf eine erste Ausführungsform einer erfindungsgemäß gestalteten wärmeschrumpfbaren Kernschicht. Fig. 2 shows a plan view of a first embodiment of the invention designed according to the heat-shrinkable core layer.

Fig. 3 zeigt eine zweite Ausführungsform einer erfindungsgemäß gestalteten wärmeschrumpfbaren Kernschicht. Fig. 3 shows a second embodiment of an inventive heat-shrinkable designed core layer.

Fig. 4 zeigt eine dritte Ausführungsform einer erfindungsgemäß gestalteten wärmeschrumpfbaren Kernschicht. Fig. 4 shows a third embodiment of an inventive heat-shrinkable designed core layer.

In Fig. 1 liegt eine wärmeschrumpfbare Kernschicht 1 zwischen zwei Deckschichten 2 und 3. Die Deckschicht 2 besteht aus einem allenfalls schwach vernetzten thermo­ plastischen Kunststoff. Durch Erwärmen der wärmeschrumpf­ baren Kernschicht 1 werden deren Abmessungen in einer Koordinatenrichtung, nämlich der Schrumpfrichtung, verkürzt. Die Abmessungen in der anderen Koordinatenrich­ tung bleiben dabei im wesentlichen unverändert.In Fig. 1, a heat-shrinkable core layer 1 is situated between two cover layers 2 and 3. The cover layer 2 consists of a possibly poorly cross-linked thermoplastic. By heating the heat-shrinkable core layer 1 , its dimensions are shortened in a coordinate direction, namely the direction of shrinkage. The dimensions in the other coordinate direction remain essentially unchanged.

Die thermoplastische Deckschicht 2 und die Deckschicht 3, welche auch aus Schmelzkleber bestehen kann, erweichen beim Schrumpfvorgang, so daß sie der Schrumpfbewegung ohne Abtropfen folgen können. The thermoplastic cover layer 2 and the cover layer 3 , which can also consist of hot melt adhesive, soften during the shrinking process so that they can follow the shrinking movement without dripping.

Auf eine der Deckschichten kann als Wasserdampfsperre eine Aluminiumschicht aufgedampft sein. Vorteilhaft kann die Aluminiumschicht auf die mit der Deckschicht 2 versehene Kernschicht 1 auf die Grenzfläche zu einer Schmelzkleber­ schicht 3 aufgedampft sein.An aluminum layer can be vapor-deposited onto one of the cover layers as a water vapor barrier. The aluminum layer can advantageously be vapor-deposited onto the core layer 1 provided with the cover layer 2 on the interface with a hot-melt adhesive layer 3 .

In den Fig. 2 und 4 sind alternative Gestaltungen der Lochreihen von Kernfolien 4, 5 und 6 dargestellt.In FIGS. 2 and 4 are alternative configurations of the rows of holes of core sheets 4, 5 and 6.

In Fig. 2 werden die Lochreihen 7, 8 und 9 durch kreis­ förmige und durch Abstandszonen 11 getrennte Löcher 10 gebildet, welche zu benachbarten Lochreihen versetzt sind, so daß einer Abstandszone 11 jeweils ein Loch 10 einer benachbarten Lochreihe gegenüberliegt.In Fig. 2 the rows of holes 7 , 8 and 9 are formed by circular and separated by spacing zones 11 holes 10 , which are offset from adjacent rows of holes, so that a spacing zone 11 is opposite a hole 10 of an adjacent row of holes.

Zwischen zwei Lochreihen 7, 8 und 9 liegen in Schrumpfrich­ tung durchgehend verlaufende Streifen, welche bei der Wärme-Schrumpfung wirksam sind.Between two rows of holes 7 , 8 and 9 are continuous strips in the direction of shrinking, which are effective in heat shrinkage.

In Fig. 3 sind statt kreisrunder Löcher 10 Einschnitte 12 vorgesehen. Bei dieser Ausführung steht der Gesamtquer­ schnitt der Folie 5 für die Schrumpfwirkung zur Verfügung.In Fig. 3 10 incisions 12 are provided instead of circular holes. In this embodiment, the total cross section of the film 5 is available for the shrinking effect.

Bei einer Ausführung nach Fig. 4 mit länglichen schmalen Löchern 13 geht nur ein geringer Anteil des Querschnitts der Folie 6 für die Schrumpfwirkung verloren. Andererseits besteht die Möglichkeit des Durchgriffs einer Deckschicht 2 auf eine gegenüberliegende Deckschicht 3.In an embodiment according to Fig. 4 with elongated narrow holes 13 only a small portion is lost of the cross section of the film 6 for the shrinking effect. On the other hand, there is the possibility of a cover layer 2 reaching through to an opposite cover layer 3 .

Die eingestanzten Löcher 10 und 13 sowie die Einschnitte 12 werden vorzugsweise nach dem Recken der Folien 4, 5 oder 6 eingebracht. Dann bleiben die gelochten Folien glatt und verwerfungsfrei, so daß aus Folien bestehende Deckschich­ ten einwandfrei aufgebracht werden können.The punched holes 10 and 13 and the incisions 12 are preferably made after stretching the foils 4 , 5 or 6 . Then the perforated foils remain smooth and free of distortion, so that existing top layers of foils can be applied properly.

Claims (9)

1. Wärmeschrumpfbare Folie mit einer durchlässigen wärmeschrumpfbaren Kernschicht (1) und mindestens einer damit verbundenen geschlossenen Deckschicht (2, 3), insbesondere für Kabelschrumpfmuffen, dadurch gekennzeichnet, daß die wärmeschrumpfbare Kernschicht (1) aus einer Kern-Folie (4, 5, 6) besteht, in welche aus einer Folge von Löchern (10, 12, 13) bestehende Lochreihen (7, 8, 9) eingebracht sind.1. Heat-shrinkable film with a permeable heat-shrinkable core layer ( 1 ) and at least one associated cover layer ( 2 , 3 ), in particular for cable shrink sleeves, characterized in that the heat-shrinkable core layer ( 1 ) consists of a core film ( 4 , 5 , 6 ), into which rows of holes ( 7 , 8 , 9 ) consisting of a series of holes ( 10 , 12 , 13 ) are introduced. 2. Folie nach Anspruch 1, dadurch gekennzeichnet, daß die Lochreihen (7, 8, 9) durch Stanzen hergestellt sind.2. Film according to claim 1, characterized in that the rows of holes ( 7 , 8 , 9 ) are made by punching. 3. Folie nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Löcher (10, 12, 13) einer Lochreihe (7, 8, 9) in Schrumpfrichtung aufeinanderfolgen.3. Film according to claim 1 or 2, characterized in that the holes ( 10 , 12 , 13 ) of a row of holes ( 7 , 8 , 9 ) follow one another in the shrinking direction. 4. Folie nach Anspruch 3, dadurch gekennzeichnet, daß die Löcher (10, 12, 13) benachbarter Lochreihen (7 und 8 bzw. 8 und 9) gegeneinander versetzt sind.4. A film according to claim 3, characterized in that the holes ( 10 , 12 , 13 ) of adjacent rows of holes ( 7 and 8 or 8 and 9 ) are offset from one another. 5. Folie nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Löcher (12, 13) in Schrumpfrichtung länglich ausgebildet sind.5. Film according to one of claims 1 to 4, characterized in that the holes ( 12 , 13 ) are elongated in the shrinking direction. 6. Folie nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Abmessungen der Löcher (10, 12, 13) in Schrumpfrichtung größer als die Abstände benachbarter Löcher (Abstandszone 11) sind. 6. Film according to one of claims 1 to 5, characterized in that the dimensions of the holes ( 10 , 12 , 13 ) in the shrinking direction are larger than the distances between adjacent holes (distance zone 11 ). 7. Folie nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie außer der wärmeschrumpfenden Kern-Folie (4, 5, 6) und mindestens einer Deckschicht (2) weitere Schichten (3) aufweist.7. Film according to one of claims 1 to 6, characterized in that it has, in addition to the heat-shrinking core film ( 4 , 5 , 6 ) and at least one cover layer ( 2 ), further layers ( 3 ). 8. Folie nach Anspruch 7, dadurch gekennzeichnet, daß eine der weiteren Schichten eine geschlossene Metallschicht ist.8. Film according to claim 7, characterized in that one of the other layers is a closed metal layer. 9. Folie nach Anspruch 8, dadurch gekennzeichnet, daß die Metallschicht eine auf eine Trägerschicht aufgedampfte Aluminiumschicht ist.9. Film according to claim 8, characterized in that the metal layer on a support layer is evaporated aluminum layer.
DE3929012A 1989-09-01 1989-09-01 Thermal shrinkage insulation tape - has thermally responsive layer sandwiched between cover and adhesive Withdrawn DE3929012A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3929012A DE3929012A1 (en) 1989-09-01 1989-09-01 Thermal shrinkage insulation tape - has thermally responsive layer sandwiched between cover and adhesive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3929012A DE3929012A1 (en) 1989-09-01 1989-09-01 Thermal shrinkage insulation tape - has thermally responsive layer sandwiched between cover and adhesive

Publications (1)

Publication Number Publication Date
DE3929012A1 true DE3929012A1 (en) 1991-03-07

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ID=6388395

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3929012A Withdrawn DE3929012A1 (en) 1989-09-01 1989-09-01 Thermal shrinkage insulation tape - has thermally responsive layer sandwiched between cover and adhesive

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528125A1 (en) * 1991-08-09 1993-02-24 Stewing Nachrichtentechnik GmbH & Co. KG Berlin Heat-recoverable sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528125A1 (en) * 1991-08-09 1993-02-24 Stewing Nachrichtentechnik GmbH & Co. KG Berlin Heat-recoverable sheet

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