EP2715742A1 - Semi-finished product in the form of a conductive strip that can be embedded in a composite material, and method for manufacturing such a strip - Google Patents
Semi-finished product in the form of a conductive strip that can be embedded in a composite material, and method for manufacturing such a stripInfo
- Publication number
- EP2715742A1 EP2715742A1 EP12722133.1A EP12722133A EP2715742A1 EP 2715742 A1 EP2715742 A1 EP 2715742A1 EP 12722133 A EP12722133 A EP 12722133A EP 2715742 A1 EP2715742 A1 EP 2715742A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- semi
- layers
- product according
- conductive layer
- strip
- 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.)
- Granted
Links
- 239000011265 semifinished product Substances 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 239000003989 dielectric material Substances 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 claims description 35
- 239000011888 foil Substances 0.000 claims description 18
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 13
- 239000000806 elastomer Substances 0.000 claims description 13
- 229920001187 thermosetting polymer Polymers 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000004697 Polyetherimide Substances 0.000 claims description 7
- 229920001601 polyetherimide Polymers 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 238000003490 calendering Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 2
- 238000010924 continuous production Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 238000004073 vulcanization Methods 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 6
- 238000010411 cooking Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- 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
- H01B7/08—Flat or ribbon cables
- H01B7/0838—Parallel wires, sandwiched between two insulating layers
-
- 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
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/10—Insulating conductors or cables by longitudinal lapping
- H01B13/103—Insulating conductors or cables by longitudinal lapping combined with pressing of plastic material around the conductors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
Definitions
- the invention relates to a semifinished product in the form of an integrated conductive strip in a laminated composite material.
- the invention is more particularly, but not exclusively, applicable in the aeronautical field for producing elements made of composite materials reinforced by a fibrous reinforcement in a matrix made of a polymer, in order to confer on these structural elements capabilities electrical conduction.
- Structural elements consisting of a laminated composite material with fiber reinforcement and having, moreover, electrical conduction properties are described in the prior art and in particular in the document FR-A-2924894.
- This document discloses a laminated structural part comprising, between two fibrous reinforcement plies, a layer comprising a network of conductive cables.
- Said document also describes a method for obtaining such a structural element, wherein layers of conductive cables are inserted between one or more pairs of structural folds, so as to constitute a dry preform, the assembly then being impregnated with a resin by a resin transfer process to form the matrix and to provide the cohesion of the composite material.
- This method of obtaining by resin transfer is however not suitable, or proves to be unproductive, for certain parts, particularly thin and large parts, such as fuselage panels, where such a method can not be used. to compete, in terms of productivity, especially with processes implementing draping pre-impregnated folds.
- the invention proposes a semifinished product, in particular in the form of a strip, capable of being deposited by draping for the constitution of a laminated composite material which semi-product comprises according to a cross section and over its entire length:
- a first conductive layer made of a material electrically conductive
- the semi-finished product according to the invention comprises connecting layers making it possible, on the one hand, to ensure the connection of said semi-product with a preform at the time of draping, and on the other hand, the cohesion of the layer.
- conductive with all the stratification of the composite material, during the cooking or consolidation of the stack constituting the part in which is integrated said conductive layer.
- such a part, incorporating a conductive layer can be achieved by manual or automated draping techniques, implementing pre-impregnated folds.
- the invention can be implemented according to the advantageous embodiments, described below, which can be considered individually or in any technically operative combination.
- the insulating layers consist of a partially vulcanized elastomer.
- this elastomer layer gives the laminated part comprising a conductive layer integrated in said part via a semi-finished product according to the invention, vibroacoustic absorption capabilities and ability to mechanically protect said conductive layer.
- the partial vulcanization of the insulating layers makes it possible to perfect this vulcanization during the firing of the laminated part incorporating the semi-finished product according to the invention, and thus to ensure a strong cohesion of the conductive layer with the rest of the part.
- the insulating layers consist of a partially vulcanized elastomer with a vulcanization rate of the order of 60%.
- a vulcanization rate of the order of 60%.
- Such partial vulcanization is achieved by heating for a short time.
- the heating temperature is generally of the order of 1 10 ° C.
- the bonding layers consist of a thermosetting glue.
- the semifinished product has adequate tackiness for its deposition by draping on a preform.
- the tie layers consist of a thermoplastic polymer. This feature improves the resistance to impact and thermal stresses of the entire laminate in which such a semi-product is integrated.
- the thermoplastic polymer comprises polyetherimide or PEI. Since this polymer is at least partially miscible in many thermosetting and thermoplastic resins, this characteristic makes it possible to ensure a strong cohesion of the conductive layer with the rest of the laminated composite part.
- the insulating layers and the bonding layers consist of a partially polymerized thermosetting resin.
- the semi-product object of the invention fits perfectly by draping in a lamination of pre-impregnated plies of such a thermosetting resin.
- the partial polymerization makes it possible at one and the same time to preserve the cohesion of the semifin object of the invention during draping, but also to preserve the flexibility required for this draping operation.
- the insulating layers and the bonding layers consist of a partially polymerized thermosetting resin, with a resin polymerization rate of 60 to 80%.
- a partial polymerization is carried out by heating for a short time.
- the heating temperature is of the order of generally around 80 ° C to 1 10 ° C, depending on the resins used.
- the insulating layers and the tie layers consist of a thermoplastic elastomer comprising polyetherimide (PEI). So the semi-product The subject of the invention is capable of being integrated in a stratification constituting a thermoplastic or thermosetting matrix composite.
- PEI polyetherimide
- the conductive layer consists of a metal foil, a braid or a metal cable.
- the finesse of such a foil allows the band to marry any type of shape including shapes double curvature.
- said metal foil is made of an aluminum alloy which can be obtained by rolling in extremely thin thickness and has a low density.
- the metal foil may also be made of a copper alloy.
- the conductive layer consists of a plurality of metallic conductors electrically insulated from one another.
- the conductive layer consists of several different electrical signals can be transmitted in each of the conductors and the lateral separation of the conductors from one another makes it possible to use thicker conductors without impairing the shaping capacity of the semi-finished product.
- the invention also relates to a process for manufacturing such a semi-product according to the different embodiments, which semi-product comprises elastomer insulating layers, said method comprising the steps of:
- the method which is the subject of the invention makes it possible to manufacture automatically large quantities of semi-finished products, in the form of strips or coils, which coils can be stored and integrated as much as necessary into laminates constituting parts in material composite.
- FIG. 1 is an exploded view in section along a section AA, defined in FIG. 2, of two embodiments of a semi-finished product according to the invention, FIG. 1A, according to an alternative embodiment comprising a foil as a layer.
- conductive and Figure 1 B according to an alternative embodiment wherein said conductive layer comprises a plurality of conductors;
- FIG. 2 shows in elevational view, a semi-product according to an alternative embodiment of the invention having a plurality of conductors in the conductive layer;
- FIG. 3 is a block diagram of an exemplary method of continuously producing a semi-finished product according to the invention.
- FIG. 1 according to a first exemplary embodiment of a semifinished product (101, 102) of the invention, which comprises, at the core, a conductive layer (105, 106) which, according to a first variant (101 ) embodiment, may consist of a foil (105) metal, Figure 1A, or, in a second variant (102), consisting of a plurality (106) of conductors, Figure 1 B arranged in a sheet, preferably under the form of so-called flat metal cables.
- This conductive layer (105, 106) is sandwiched between two insulating layers (121, 122) made of a dielectric material, preferably, but not exclusively, an elastomer.
- the semi-product (101, 102) comprises two layers (1 1 1, 1 12) called connection layers having interface characteristics rendering said semi-finished product (101, 102) capable of draping on an automatic draper and able to form a cohesive interface with fibrous reinforcement layers pre-impregnated following a cooking or consolidation operation.
- Said bonding layers (1 1 1, 1 12) can be layers reported on the insulating layers, by impregnation of these layers hot or cold, or be an integral part of said insulating layers.
- Said insulating layers (121, 122) must be sufficiently thick to ensure complete electrical insulation of the conductive layer (105, 106) of its environment in the finished product, ie after the semi-finished product ( 101, 102) object of the invention has undergone a form of draping, to insert it in the heart of a laminate, then a cooking operation or consolidation at high temperature and under pressure.
- This insulation must be total and effective, especially for high voltages, of the order of 3000 volts.
- the insulating layers (121, 122) must also be watertight, but retain sufficient flexibility to allow the semi-finished product (101, 102) to be rolled for installation on an automatic draper machine, and to be able to undergo a peel-press operation on the preform without the integrity of said layers being degraded by these mechanical stresses.
- the semifinished product (101, 102) of the invention must ensure the transfer of mechanical loads between the folds located on either side of said semi-product, without constituting a weak zone in the stack and without losing its integrity with respect to its electrical insulation and sealing properties.
- the conductive layer (105) consists of a foil.
- Said foil (105) may consist of a copper foil or an aluminum alloy. Since said foil (105) is thin, it is easily adapted to draping operations.
- the foil has a width of 20 mm, which for a conductive section of 1 mm 2 leads to a thickness (135) of said foil of 0.05 mm.
- This foil of thin layer can be inserted in thin resin layers, thus, the insulating layers (121, 122) can consist of a thermosetting resin, partially polymerized, for example with a resin polymerization rate of the order of 60 at 80%.
- This partial polymerization placing said resin in a so-called half-cooked state, makes it possible to preserve said resin with a certain tack, so that the bonding layers (11 1, 1 12) are constituted by the outside of the insulating layers ( 121, 122).
- the flexibility of the band is then sufficient to be draped, but of sufficient rigidity to support said foil and prevent it from creasing during these draping operations.
- the subsequent firing of the lamination corresponding to the finished part makes it possible, by the polymerization of the assembly, to produce a strongly cohesive connection of the semi-finished product (101) with the rest of the part.
- the conductive layer (106) consists of a plurality of conductors, for example in the form of so-called flat cables.
- This configuration makes it possible to transit different signals in each of the conductors.
- the section of each conductor must be sufficient individually so that, compared to the foil (105), this technical solution leads to a substantially greater thickness (136) of each of the conductors.
- each flat cable having a width (146) of 2 mm, a conductive section of 1 mm 2 is obtained for a thickness (136) of conductors of 0.5 mm.
- this embodiment leads to a substantially higher semi-product thickness (102).
- each flat cable must be spaced transversely from its neighbor, a distance (246) sufficient, typically of the same order of magnitude as the width (146) of the cable. This distance must also be filled by the insulating layers (121, 122).
- the insulating layers (121, 122) advantageously consist of a partially vulcanized elastomer.
- the flexibility of the insulating layers (121, 122) is controlled at different stages of manufacture of the semi-product (102) and its implementation for the constitution of a laminated structural part, by the vulcanization rate of said layers (121, 122) insulating.
- the conductors or the foil are unwound from a roller (306) of great length.
- a continuous surface treatment (310) two strips (321, 322) are attached to said conductors or foil by rolling (330) or calendering.
- the two strips (321, 322) consist of a raw elastomer.
- the strips (321, 322) of elastomer are very malleable and plastic and, during the calendering operation (330), they perfectly fit the conductors (306) and in particular fill the spaces between said conductors.
- the assembly thus produced is then partially vulcanized by passing through a cooking station (340) for example with a vulcanization rate of the order of 60%.
- the insulating elastomer layers achieve a cohesion and elastic behavior that allows to roll (350) the tape on a roll for installation on an automatic draper and the removal of the said tape by draping on a pegy preform.
- the partially vulcanized semi-finished product is cooked or consolidated with said preform.
- the rigidity thereof increases, so that a mechanical transfer of forces can be achieved through said semi-product.
- the presence of polyetherimide in the elastomer constituting said insulating layers (121, 122) allows a strong chemical cohesion between the semi-finished product of the invention and the rest of the stratification, because of the at least partial miscibility of this polymer in both thermoplastic resins and thermosetting resins.
- a very rigid laminate allows effective transfer of forces on either side of the semi-product (101, 102) object of the invention when it is integrated into the final piece.
- the elasticity of the semi-product gives the structural part incorporating said semi-product vibroacoustic damping capabilities.
- the invention achieves the desired objectives, in particular it allows the continuous and economical manufacture of semifinished products (101, 102) ready to be draped with the aid of an automatic machine and integrable on demand in the lamination of a composite piece with fibrous reinforcement, giving said room capabilities for routing a signal or electrical power.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1154667A FR2975864A1 (en) | 2011-05-27 | 2011-05-27 | SEMI-PRODUCT IN THE FORM OF A CONDUCTIVE BAND INTEGRABLE IN A COMPOSITE MATERIAL AND METHOD OF MANUFACTURING SUCH A BAND |
PCT/EP2012/059056 WO2012163674A1 (en) | 2011-05-27 | 2012-05-15 | Semi-finished product in the form of a conductive strip that can be embedded in a composite material, and method for manufacturing such a strip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2715742A1 true EP2715742A1 (en) | 2014-04-09 |
EP2715742B1 EP2715742B1 (en) | 2019-07-24 |
Family
ID=46125445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12722133.1A Active EP2715742B1 (en) | 2011-05-27 | 2012-05-15 | Semi-finished product in the form of a conductive strip that can be embedded in a composite material, and method for manufacturing such a strip |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140290977A1 (en) |
EP (1) | EP2715742B1 (en) |
FR (1) | FR2975864A1 (en) |
WO (1) | WO2012163674A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5916678B2 (en) * | 2013-10-03 | 2016-05-11 | 古河電気工業株式会社 | Aluminum / resin composite, aluminum insulated wire and flat cable, and production method thereof |
FR3039923B1 (en) | 2015-08-04 | 2020-10-09 | Abmi Sud Est | METHOD OF MANUFACTURING A COMPOSITE MATERIAL |
CN109988522B (en) * | 2017-12-29 | 2020-11-06 | 宁德时代新能源科技股份有限公司 | Adhesive tape and electrochemical device comprising same |
DE102018114627B4 (en) * | 2018-06-19 | 2024-02-15 | Auto-Kabel Management Gmbh | Method and device for producing a cable |
CN114571532B (en) * | 2020-11-30 | 2024-04-02 | 上海昊佰智造精密电子股份有限公司 | Die cutting device and method for manufacturing bending-prevention fold copper foil die cutting piece |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3217245A (en) * | 1962-03-27 | 1965-11-09 | Whitney Blake Co | Method of testing a packaged insulated cable wound on an annular core |
US3897187A (en) * | 1971-11-15 | 1975-07-29 | Greengate Cables Limited | Apparatus for the continuous production of laminated electric conductors |
JP2942458B2 (en) * | 1993-04-16 | 1999-08-30 | 住友電気工業株式会社 | Manufacturing method and manufacturing equipment for conductor for flat cable |
WO1997001437A1 (en) * | 1995-06-28 | 1997-01-16 | Fraivillig Materials Company | Circuit board laminates and method of making |
JP3682366B2 (en) * | 1997-12-26 | 2005-08-10 | 古河電気工業株式会社 | Wire harness and manufacturing method thereof |
US6730622B2 (en) * | 1999-12-21 | 2004-05-04 | The Procter & Gamble Company | Electrical cable |
JP3672784B2 (en) * | 2000-01-26 | 2005-07-20 | 矢崎総業株式会社 | Manufacturing method of wire harness |
DE10057479A1 (en) * | 2000-11-20 | 2002-05-23 | Alcatel Sa | Manufacturing electrical flat strip cable involves arranging bare conductors in parallel at distance apart between two foils of insulating material, welding foils together using ultrasound |
US7091422B1 (en) * | 2005-01-28 | 2006-08-15 | Multek Flexible Circuits, Inc. | Flexible flat cable with insulating layer having distinct adhesives on opposing faces |
FR2924894B1 (en) | 2007-12-10 | 2010-12-10 | Eads Europ Aeronautic Defence | PIECES OF ELECTRO-STRUCTURAL COMPOSITE MATERIAL. |
US8866018B2 (en) * | 2009-01-12 | 2014-10-21 | Oak-Mitsui Technologies Llc | Passive electrical devices and methods of fabricating passive electrical devices |
-
2011
- 2011-05-27 FR FR1154667A patent/FR2975864A1/en not_active Withdrawn
-
2012
- 2012-05-15 US US14/117,054 patent/US20140290977A1/en not_active Abandoned
- 2012-05-15 EP EP12722133.1A patent/EP2715742B1/en active Active
- 2012-05-15 WO PCT/EP2012/059056 patent/WO2012163674A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012163674A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012163674A1 (en) | 2012-12-06 |
US20140290977A1 (en) | 2014-10-02 |
EP2715742B1 (en) | 2019-07-24 |
FR2975864A1 (en) | 2012-11-30 |
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