GB2250996A - Composite material - Google Patents

Composite material Download PDF

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Publication number
GB2250996A
GB2250996A GB9027506A GB9027506A GB2250996A GB 2250996 A GB2250996 A GB 2250996A GB 9027506 A GB9027506 A GB 9027506A GB 9027506 A GB9027506 A GB 9027506A GB 2250996 A GB2250996 A GB 2250996A
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GB
United Kingdom
Prior art keywords
composite material
ceramic
fibres
elastomeric
composite
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Withdrawn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
GB9027506A
Other versions
GB9027506D0 (en
Inventor
Roy Olsson
Colin Dixon
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.)
HARBORO RUBBER Co Ltd
LYCAB Ltd
Original Assignee
HARBORO RUBBER Co Ltd
LYCAB Ltd
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 HARBORO RUBBER Co Ltd, LYCAB Ltd filed Critical HARBORO RUBBER Co Ltd
Priority to GB9027506A priority Critical patent/GB2250996A/en
Publication of GB9027506D0 publication Critical patent/GB9027506D0/en
Publication of GB2250996A publication Critical patent/GB2250996A/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/08—Oxygen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
    • 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
    • H02G15/013—Sealing means for cable inlets
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2321/00—Characterised by the use of unspecified rubbers

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

A composite material comprises an elastomeric compound together with a fibrous ceramic material. The ceramic material may be woven or non woven and wrapped around the elastomeric material or incorporated therein. The ceramic provides enhanced flame protection. The composite material is primarily for use in the blocks of cable transit systems. The ceramic may comprise strands of amorphous silica or silica/alumina blends.

Description

COMPOSITE MATERIAL This invention relates to composite materials which can be used to form flame barriers and more particularly, but not exclusively, transit systems incorporating such composite materials.
Transit systems are used to provide a flame barrier around cables or pipes which pass from one environment to another, for example through a wall or bulkhead.
Known transit systems comprise a frame which surrounds the pipes or cables and a plurality of resilient blocks of different shapes which are selected to fill the frame and can be subjected to pressure so as to deform into sealing contact with the pipes or cables, between themselves and with the surrounding frame. The known blocks are made of cross-linked homogeneous elastomeric composition. When subjected to heat or flame such blocks progressively burn, the char formed on the exposed burnt surface acting to protect the interior unburnt portion of the block from the effects of the flame. Formerly such blocks were produced from a wide range of commercial elastomers, but recently to satisfy environmental considerations, only halogen free materials are employed.
Higher standards of flame protection can only be met using the present materials if the depth of the blocks is considerably increased, this in turn requiring a frame of increased dimensions to accommodate the larger blocks. Thus to meet the higher standards the entire transit would have to be replaced rather than just the blocks which is extremely costly.
The present invention has been made with the object of meeting this problem.
According to the invention there is provided a composite material comprising an elastomeric compound having ceramic incorporated therein.
In preferred embodiments of the invention the ceramic is in the form of fibres which can be woven or non-woven in the form of ceramic paper, a batt or felt.
The ceramic may be fired.
The ceramic can be incorporated in the elastomer in many different ways. The ceramic is in the form of a layer such as a woven "cloth" or a non-woven paper, batt or felt, or chopped ceramic fibres can be located in the elastomer during moulding thereof or can be coated with elastomer. Sheets of elastomer combined with ceramic in fibre or other form can be wrapped around at least a part of moulded elastomer bodies.
The amount of ceramic incorporated in the elastomer is chosen having regard to the intended use of the composite material. Generally, however, the ceramic will constitute from 25% to 85% by weight based on the total weight of the composite. It is not essential that the ceramic be distributed uniformly in the elastomer; the concentration of ceramic can be adjusted so as to be greater or less in one or more locations than in another or others.
When the ceramic is in fibrous form the fibres can be oriented relative to the shape of the composite and/or relative to one another. Alternatively the fibres can be incorporated in the composite in a random manner.
Ceramic in fibrous form that can usefully be used in this invention comprises strands of amorphous silica or silica/alumina blends which can withstand continuous exposure to temperatures of the order of 1000"C and preferably withstand exposure to temperatures of the order of 1600"C for short periods of time of about 3O - ~ ts. . Preferably the fibres are heat treated in the same way as synthetic textile fibres in order to minimise shrinkage in use.
The precise construction of a woven ceramic adopted in the present invention may depend, inter alia, on the intended use of the composite material.
For the purpose of incorporation in a flame or heat resistant body a woven ceramic may be from 0.5 to 2.3 mm thick with a weight of from 300 to 1200 g/m2.
Any weave structure can be chosen, for example plain, satin or twill.
When the fibres are used to form a non-woven ceramic fabric a typical material will be from 3 to 12 mm in thickness with a weight of from 300 to 1000 g/m2.
As stated the ceramic fibres can be formed into a paper like composition. In such a composition the fibres are in a random array. The thickness of the paper is preferably from 0.5 to 3.00 mm and the bulk density from 150 to 350 kg/m3 Where the ceramic fabric or paper is to be incorporated in the composite by wrapping around an elastomer body, the structure is, if possible, such that it will readily drape around the said body.
However, it is to be understood that the requirement for appropriate drape should not be obtained to the detriment of any flame or heat resistant properties imparted to the composite by the ceramic where those properties are of primary importance.
The elastomer is preferably a vulcanised elastomer including mineral filler where the intended use of the composite is as a flame or heat barrier. Preferred elastomers are those which are halogen free. Typical elastomers useful in this invention include natural and synthetic rubbers such as ethylene propylene rubber, ethylene propylene diene rubber (EPDM), polysiloxane treated EPDM, ethylene vinyl acetate, silicone rubber, butyl rubber, polyisoprene rubber, styrene butadiene rubber; polyisobutylene, polybutadiene, transpolyoctenamer, transpolypentenamer and high styrene resin. Resins can be used alone or in combination. Mineral fillers which can usefully be employed include calcium carbonate, magnesium oxide, magnesium hydroxide, aluminium trihydrate, zinc borate and mixtures thereof.
The elastomeric composition will normally include vulcanising ingredients which may be based on a sulphur or peroxide system. One or more pigments may also be included.
Specific embodiments of the invention will now be described by way of example with reference to the accompanying drawings in which: Fig.l is a perspective view of a block of composite material; Fig.2 is a view of the other side of the blok of Fig.l; Fig.3 shows a form of fastening means; Fig.4 shows another composite material assembly; Fig.5 is a perspective view of a further embodiment of a block of composite material:: Fig.6 illustrates a body made from the material of Fig.5 and additional elastomer; Fig.7 shows a different form of closed block for use in cable transit systems; Figs.8a-c shows different forms of through blocks for use in cable transit systems; Figs.9a and b show two different end packer assemblies for use in cable transit systems; Figs.10a and b show two further kinds of end packer units for use in cable transit systems; and Fig.ll illustrates another use for the composite material of the invention.
Referring to Fig.l of the drawings a block of composite material comprises a sheet 10 of ceramic coated with elastomer. The ceramic may be woven or non-woven or in paper form and coating can be effected by spreading an elastomer solution onto the ceramic or by calendering. The sheet 10, cut to size as necessary is then wrapped around a part of a moulded elastomer pill 12 in the form of a cube. In the embodiment illustrated the sheet covers three sides of the cube and the ends of the sheet are fastened to a fourth side as by staples 14 as shown in Fig.2. Fastening of the sheet to the elastomer pill can be by any suitable means, for example by a metal or ceramic stud or rivet 16 as shown in Fig.3 which is forced into the pill.
Blocks as illustrated in Figs.l and 2 can be combined with further elastomer 16 as shown in Fig.4 to form a body with elastomer coated ceramic sheet at each end and adjacent parts of two opposite sides. The body of Fig.4 can be produced by putting blocks of Figs.l and 2 at the opposite ends of a mould for the Fig.4 body and then introducing additional elastomer into the mould by a conventional technique such as compression, transfer or injection moulding.
Another form of composite material is illustrated in Fig.5 and comprises a block of elastomer having ceramic, for example in the form of fibres, chopped cloth, tow, batt or rope or combination thereof, distributed throughout. The ceramic may be introduced into an elastomer solution which is subsequently moulded. Pieces may be cut from the block of Fig.5 and placed at the ends of a mould into which further elastomer is introduced to form the body of Fig.6 having ends 18 of ceramic enriched elastomer.
The above embodiments described with reference to the drawings are illustrative of only some of the possible forms of composite material of the invention and of the methods of producing them. Thus although the ceramic rich parts of some composites are illustrated as being at or close to the surface of composite bodies, it is quite possible to include one or more ceramic rich parts within such bodies as well as or in place of the surface rich parts.
Other methods of making a composite include spraying an elastomer solution including ceramic using a spray having a tow chopper to build up to a desired thickness in much the same way as used in glass fibre production methods.
When a ceramic rich composite is combined with further elastomer, as for example in Figs.l and 2, Fig.4 or Fig.6, the further elastomer may include additives having desired properties such as heat insulating properties. Additives which can usefully be included are cork, mica, exfoliated mica and the like. The elastomer can be cellular or foamed, in the part to which a ceramic rich composite is added, in the ceramic rich portion or both.
As already stated the composite material of the invention is particularly suitable for blocks in cable transit systems. Such blocks can be made to the same dimensions as blocks used in existing systems and can, therefore, replace the blocks in existing systems without the necessity of changing the transit frame.
The greater heat and flame resistance of the composite material of the materials of the invention means that existing systems can be easily upgraded to a higher standard just by replacement of the blocks.
In many cases a sufficiently improved heat and/or flame resistance is obtained by ceramic enrichment of one or both faces of the blocks that are exposed in the assembled transit. Closed blocks which are of this type are of the kind illustrated in Figs.4 and 6. If it is desired to do so all four side faces adjacent an end face can be covered with ceramic/elastomer sheet as illustrated in Fig.7. This assembly can be made by preparing the ceramic/elastomer sheet material 10 in the form of a greek cross, the arms of which are folded over the four adjacent side surfaces of a pill which is then combined with an elastomer body as already described in connection with Figs.l, 2 and 4.
Through blocks for transit systems can be prepared for example from the blocks as illustrated in Figs.4 or 7, and one is illustrated in Fig.8a. A recess 20 for accommodating a pipe or cable extends between the ceramic enriched faces of the block. Similarly a through block as illustrated in Fig.8b can be made from the block of Fig.6.
In the embodiment of Fig.8c a sheet of ceramic/elastomer is cut so that it will fit across the end faces 22 of the through block and also along the surface of channel 20.
The same type of composite structure can be used for the end packers of the transit system. Fig.9a shows an end packer with ceramic/elastomer sheet across the facing surface 20 and Fig.9b shows a similar end packer with ceramic/elastomer sheet on both the facing surface 30 and the opposite outer surface 32. End packer blocks as illustrated in Figs.10a and 10b can also have ceramic/elastomer sheet on the facing surface 34 or on both facing and opposite surface 36.
It is to be understood that ceramic enrichment by other methods can be adopted for end packers just as it can for the blocks.
In some cases it is desirable to provide a sleeve or bush around a cable or pipe along at least that part which passes through a cable transit. The composite material of the invention can be used for that purpose as illustrated in Fig.ll. A cable 40 has a sheet 42 of ceramic/elastomer composite material wrapped therearound where it passes through the through blocks 44 of a transit system. In the illustration the sheet 42 extends along the cable beyond the end faces of the through block but that is not essential in this kind of assembly. The through blocks may themselves be made of composite materials for example as described with reference to Fig.8.
The invention is not restricted to the above described embodiments and many other modifications and variations can be made. In particular use of the composite material is not confined to cable transits.
It is applicable to other applications especially where head and/or flame resistance is required.

Claims (26)

1. A composite material comprising an elastomeric compound having ceramic incorporated therein.
2. A composite material as claimed in claim 1, wherein the ceramic comprises fibres.
3. A composite material as claimed in claim 2, wherein the fibres are woven.
4. A composite material as claimed in claim 2, wherein the fibres are non woven.
5. A composite material as claimed in claim 2 or claim 4, wherein the fibres are in the form of at least one of cloth, ceramic, paper or batt or felt.
6. A composite material as claimed in any of claims 2 to 5, wherein at least some of the fibres are wrapped around at least a part of an elastomeric body.
7. A composite material as claimed in any preceding claim, wherein the material comprises from 25% to 85% by weight of ceramic based on the total weight of the composite.
8. A composite material as claimed in any preceding claim, wherein more of the ceramic is provided in one region of the composite material than another region thereof.
9. A composite material as claimed in any of claims 2 to 8 , wherein the fibres are orientated in a certain manner relative to the shape of the composite material and/or relative to one another.
10. A composite material as claimed in any of claims 2 to 8, wherein the fibres are orientated in a random manner.
11. A composite material as claimed in any preceding claim, wherein the ceramic comprises strands of at least one of amorphous silica or silica/alumina blends.
12. A composite material as claimed in claim 11, wherein the strands can withstand continuous exposure to temperatures in the order of 1000"C.
13. A composite material as claimed in claim 11 or claim 12, wherein the strands can withstand continuous exposure to temperatures in the order of 1600"C for about 30 minutes.
14. A composite material as claimed in any of claims 2 to 13, wherein the fibres are heat treated.
15. A composite material as claimed in any preceding claim, wherein the ceramic is in the form of a layer, the layer being from 0.5mm to 2.3mm thick.
16. A composite material as claimed in any preceding claim, wherein the ceramic has a weight in the range from 300 to 1200 g/m2.
17. A composite material as claimed in any preceding claim, wherein the elastomeric material comprises at least one vulcanised elastomer.
18. A composite material as claimed in any preceding claim, wherein the elastomeric material comprises a mineral filler.
19. A composite material as claimed in claim 16, wherein the mineral filler comprises at least one of calcium carbonate, magnesium oxide, magnesium hydroxide, aluminium trihydrate, zinc borate or mixtures thereof.
20. A composite material as claimed in any preceding claim, wherein the elastomeric material is halogen free.
21. A composite material as claimed in any preceding claim, wherein the elastomeric material comprises at least one of the following: natural synthetic rubbers such as ethylene propylene rubber, ethylene propylene diene rubber, polysiloxane treated ethylene propylene diene rubber, ethylene vinyl acetate, silicone rubber, butyl rubber, polyisoprene rubber, styrene butadiene rubber, polyisobutylene, polybutadiene, transpolyoctenamer, transpolypentenamer or high styrene resin.
22. A composite material as claimed in any preceding claim, wherein the elastomeric material comprises at least one vulcanising material.
23. A composite material as claimed in claim 20, wherein the vulcanising material is based on at least one of a sulphur or a peroxide system.
24. A composite material as claimed in any preceding claim, wherein the elastomeric material comprises at least one pigment.
25. A cable transit system comprising at least one body comprising the composite material as claimed in any preceding claim.
26. A block for a cable transit system made from a composite material as claimed in any of claims 1 to 25.
GB9027506A 1990-12-19 1990-12-19 Composite material Withdrawn GB2250996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9027506A GB2250996A (en) 1990-12-19 1990-12-19 Composite material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9027506A GB2250996A (en) 1990-12-19 1990-12-19 Composite material

Publications (2)

Publication Number Publication Date
GB9027506D0 GB9027506D0 (en) 1991-02-06
GB2250996A true GB2250996A (en) 1992-06-24

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GB (1) GB2250996A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2716189A1 (en) * 1994-02-17 1995-08-18 Aerospatiale Process for producing a thermal insulating material based on silica fibers
NL1008787C2 (en) * 1998-04-02 1999-10-05 R & H Systems B V Method for passing electrical cables.
WO1999066617A1 (en) * 1998-06-18 1999-12-23 Philec S.A. Thermal protection forming a heat shield
EP1792932A1 (en) * 2005-12-01 2007-06-06 R. Nussbaum AG Element for transporting media
WO2012088743A1 (en) * 2010-12-28 2012-07-05 上海金发科技发展有限公司 Flame retardant modified polypropylene composite improved by ceramic fibre and preparation process thereof
EP2394339B1 (en) 2009-02-04 2017-03-29 Roxtec AB A modularized pipe or cable lead-through
IT201700119840A1 (en) * 2017-10-23 2019-04-23 Wallmax S R L FILLING ELEMENT FOR CABLE MODULES.

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1294646A (en) * 1970-05-19 1972-11-01 Ronald Powell Improvements in or relating to mattresses or upholstery
US4047965A (en) * 1976-05-04 1977-09-13 Minnesota Mining And Manufacturing Company Non-frangible alumina-silica fibers
GB1594801A (en) * 1977-01-31 1981-08-05 Intellectual Trade Cy Sa Fire-guard composition and method for preparing same
GB1604908A (en) * 1977-08-08 1981-12-16 Minnesota Mining & Mfg Flexible intumescent sheet material with fired strength
JPS6030336A (en) * 1983-07-27 1985-02-15 ダイキン工業株式会社 Composite material
US4571411A (en) * 1985-01-25 1986-02-18 E. I. Du Pont De Nemours And Company Hybrid composite of poly(p-phenylene-trans-bisbenzothiazole) and ceramic fiber
JPS61272138A (en) * 1985-05-28 1986-12-02 鈴木　貞夫 Resin foam composite heat-insulating material
JPS637154B2 (en) * 1983-04-30 1988-02-15 Nippon Pillar Packing
US4752630A (en) * 1985-09-20 1988-06-21 Basf Aktiengesellschaft Thermoplastic polymer materials containing molecular inorganic reinforcing fibers
GB2204587A (en) * 1987-05-15 1988-11-16 Morgan Matroc Limited Composite polymeric materials containing ceramic particles
EP0297186A1 (en) * 1986-04-02 1989-01-04 Crompton Design Manufacturing Limited Paint compositions
EP0309982A2 (en) * 1987-09-30 1989-04-05 E.I. Du Pont De Nemours And Company Polymer-ceramic composite plies
EP0313407A2 (en) * 1987-10-23 1989-04-26 MITSUI TOATSU CHEMICALS, Inc. Method for preparing polyimide and composite material thereof
EP0322959A2 (en) * 1987-12-24 1989-07-05 Shell Internationale Researchmaatschappij B.V. Fibre reinforced thermoplastic composites
EP0346149A2 (en) * 1988-06-09 1989-12-13 Tonen Chemical Corporation Thermoplastic resin composition incorporated with whisker and process for producing the same
EP0371939A2 (en) * 1988-11-29 1990-06-06 Yamaha Corporation An artificial key material
GB2244274A (en) * 1990-05-08 1991-11-27 Rogers Corp Thermoplastic composite material

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1294646A (en) * 1970-05-19 1972-11-01 Ronald Powell Improvements in or relating to mattresses or upholstery
US4047965A (en) * 1976-05-04 1977-09-13 Minnesota Mining And Manufacturing Company Non-frangible alumina-silica fibers
GB1594801A (en) * 1977-01-31 1981-08-05 Intellectual Trade Cy Sa Fire-guard composition and method for preparing same
GB1604908A (en) * 1977-08-08 1981-12-16 Minnesota Mining & Mfg Flexible intumescent sheet material with fired strength
JPS637154B2 (en) * 1983-04-30 1988-02-15 Nippon Pillar Packing
JPS6030336A (en) * 1983-07-27 1985-02-15 ダイキン工業株式会社 Composite material
US4571411A (en) * 1985-01-25 1986-02-18 E. I. Du Pont De Nemours And Company Hybrid composite of poly(p-phenylene-trans-bisbenzothiazole) and ceramic fiber
JPS61272138A (en) * 1985-05-28 1986-12-02 鈴木　貞夫 Resin foam composite heat-insulating material
US4752630A (en) * 1985-09-20 1988-06-21 Basf Aktiengesellschaft Thermoplastic polymer materials containing molecular inorganic reinforcing fibers
EP0297186A1 (en) * 1986-04-02 1989-01-04 Crompton Design Manufacturing Limited Paint compositions
GB2204587A (en) * 1987-05-15 1988-11-16 Morgan Matroc Limited Composite polymeric materials containing ceramic particles
EP0309982A2 (en) * 1987-09-30 1989-04-05 E.I. Du Pont De Nemours And Company Polymer-ceramic composite plies
EP0313407A2 (en) * 1987-10-23 1989-04-26 MITSUI TOATSU CHEMICALS, Inc. Method for preparing polyimide and composite material thereof
EP0322959A2 (en) * 1987-12-24 1989-07-05 Shell Internationale Researchmaatschappij B.V. Fibre reinforced thermoplastic composites
EP0346149A2 (en) * 1988-06-09 1989-12-13 Tonen Chemical Corporation Thermoplastic resin composition incorporated with whisker and process for producing the same
EP0371939A2 (en) * 1988-11-29 1990-06-06 Yamaha Corporation An artificial key material
GB2244274A (en) * 1990-05-08 1991-11-27 Rogers Corp Thermoplastic composite material

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2716189A1 (en) * 1994-02-17 1995-08-18 Aerospatiale Process for producing a thermal insulating material based on silica fibers
EP0668252A1 (en) * 1994-02-17 1995-08-23 AEROSPATIALE Société Nationale Industrielle Process for manufacturing heat-insulating material based on silica fibres
US5569423A (en) * 1994-02-17 1996-10-29 Aerospatiale Societe Nationale Industrielle Process for the manufacture of a silica fiber based heat insulating material
NL1008787C2 (en) * 1998-04-02 1999-10-05 R & H Systems B V Method for passing electrical cables.
EP0948110A1 (en) * 1998-04-02 1999-10-06 R&H Systems B.V. Method of feeding-trough electric cables
FR2780135A1 (en) * 1998-06-18 1999-12-24 Philec Sa THERMAL PROTECTION FORMING THERMAL SHIELD
WO1999066617A1 (en) * 1998-06-18 1999-12-23 Philec S.A. Thermal protection forming a heat shield
US6501028B1 (en) 1998-06-18 2002-12-31 Philec S.A. Thermal protection forming a heat shield
EP1792932A1 (en) * 2005-12-01 2007-06-06 R. Nussbaum AG Element for transporting media
EP2394339B1 (en) 2009-02-04 2017-03-29 Roxtec AB A modularized pipe or cable lead-through
WO2012088743A1 (en) * 2010-12-28 2012-07-05 上海金发科技发展有限公司 Flame retardant modified polypropylene composite improved by ceramic fibre and preparation process thereof
IT201700119840A1 (en) * 2017-10-23 2019-04-23 Wallmax S R L FILLING ELEMENT FOR CABLE MODULES.
WO2019082049A1 (en) * 2017-10-23 2019-05-02 Wallmax S.R.L. Filling element for cable transit modules

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Publication number Publication date
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