WO2002087840A1 - Method and apparatus for manufacturing a flexible high strength composite - Google Patents

Method and apparatus for manufacturing a flexible high strength composite Download PDF

Info

Publication number
WO2002087840A1
WO2002087840A1 PCT/GB2002/001950 GB0201950W WO02087840A1 WO 2002087840 A1 WO2002087840 A1 WO 2002087840A1 GB 0201950 W GB0201950 W GB 0201950W WO 02087840 A1 WO02087840 A1 WO 02087840A1
Authority
WO
WIPO (PCT)
Prior art keywords
tow
tank
impregnating material
flexible
composite
Prior art date
Application number
PCT/GB2002/001950
Other languages
French (fr)
Inventor
Rajinder Singh
Stuart John Eaton
Jonathan Geoffrey Gore
George Jiri Tomka
Original Assignee
Infinity Squared Limited
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 Infinity Squared Limited filed Critical Infinity Squared Limited
Publication of WO2002087840A1 publication Critical patent/WO2002087840A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping

Definitions

  • This invention concerns a method and an apparatus for manufacturing a flexible high strength composite which is suitable for use, for example, in structural applications, or as a line or tape such as for measuring, marking or surveying equipment.
  • a method of manufacturing a flexible high strength composite comprising at least one carbon fibre tow, comprising filaments of carbon fibre material, impregnated in a flexible polymeric matrix, the method comprising the steps of:
  • an apparatus for manufacturing a flexible high strength composite comprising at least one carbon fibre tow, comprising filaments of carbon fibre material, impregnated in a flexible polymeric matrix, the apparatus comprising:
  • a tank for impregnating material means for twisting the at least one tow as it passes through the tank;
  • curing means for curing the impregnating material applied to the at least one tow to form the flexible polymeric matrix.
  • the twisted tow may have up to about 150 or more twists per metre.
  • the at least one tow may be passed downwardly through the tank of impregnating material, the at least one tow exiting the tank through an aperture at a lower end of the tank.
  • Means may be provided to maintain the level of impregnating material in the tank substantially at a predetermined level .
  • the impregnating material may incorporate a diluent to reduce the viscosity thereof.
  • the impregnating material may comprise a prepolymeric material.
  • the prepolymeric material may be polymerisable with a UV initiator or with a thermal initiator.
  • the impregnated tow may be passed downwardly through a curing means.
  • Means may be provided downstream of the curing means for controlling the speed of the tow through the tank and through the curing means .
  • Means may be provided to accumulate the flexible composite.
  • the flexible composite may be used, for example, in structural applications or as a line or tape such as for measuring, marking or surveying equipment, or as a high strength flexible conductor.
  • Figure 1 is a perspective view of an embodiment of a flexible high strength composite made in accordance with the present invention.
  • Figure 2 is a schematic illustration of an apparatus according to the present invention for manufacturing a flexible high strength composite.
  • a flexible high strength composite 2 comprises at least one carbon fibre tow 4, comprising filaments of carbon fibre material, encapsulated in a flexible polymeric matrix 6.
  • a plurality of carbon fibre tows 4 are provided, which may be of straight (i.e. unidirectional) form, or of twisted form, and which may each be of circular or rectangular cross-section.
  • Each of the carbon fibre tows 4 comprises filaments of carbon fibre material which suitably comprises a turbostratic structure of carbon which may be formed from one or more precursors such as mesophase pitch or polyacrylonitrile polymer. As many as one thousand tows 4 may be provided in the composite 2.
  • One or more of the tows 4 may incorporate filaments of an alternative material to provide specific properties to the resulting composite. For example, optical fibres may be incorporated so that optical signals may be sent along the composite.
  • Each tow 4 suitably comprises from 50 to 12000 filaments of carbon fibre material, each having a diameter of between 0.05 and 20 microns and suitably of about 7 microns .
  • tows 4 are of twisted form, up to about 150 twists per metre may be provided. In a typical twisted form of construction, about 100 twists per metre are provided.
  • the tows are of braided form
  • such braided form may be arranged such that some of the tows 4 are interwoven in braided form around one or more central tows, that is, in the form of maypole braiding.
  • the tows 4 may be braided in situ.
  • the flexible polymeric matrix 6 comprises a material which preferably wets the carbon fibre filaments of the tows 4 and preferably encapsulates each individual filament of the tows 4.
  • the flexible polymeric matrix 6 is arranged to adhere to the carbon fibre filaments of the tows 4. Such adhesion may be by means of an adhesive material, but is suitably by means of chemical bonding between material of the flexible polymeric matrix 6 and the carbon fibre filaments of the tows 4. A substantially uniform distribution of the carbon fibre filaments of the tows 4 is preferably provided within the flexible polymeric matrix 6.
  • the flexible polymeric matrix ⁇ suitably comprises an elastomer, or a thermoplastic plastics material, or a thermosetting plastics material.
  • a suitable elastomer comprises polyurethane or silicone rubber.
  • thermoplastic plastics material comprises methacrylate, or tri ethylolpropane triacrylate, or ethoxyethoxyethyl acrylate, or polyvinylchloride. Flexibilised derivatives of thermoplastic plastics materials may also be used.
  • thermosetting plastics comprises vinyl ester, a flexible derivative of a polyester resin, or flexibilised epoxy material.
  • the flexible polymeric matrix 6 may be applied as a prepolymeric resin material which impregnates the tow 4 and is subsequently polymerised, such as by heating or by means of applied radiation, such as ultra-violet radiation.
  • the resulting flexible composite 2 exhibits high tensile strength and high axial stiffness. It is also light in weight and exhibits high flexibility, having a low bend radius: that is, the flexible composite can be distorted repeatedly without failure of the composite. It also exhibits low thermal expansion.
  • a composite 2 is in the form of a line incorporating tows 4 with six thousand filaments and with a loading of carbon fibre to polymeric matrix ⁇ of about 80 percent. Such composite has an overall cross sectional area of about 2.9 x 10 "7 square metres, a tensile strength of about 3 to 4 GPa and an axial stiffness of about 300 GPa.
  • the composite has a bend diameter of about 10mm where there is one twist in the tow every 30mm.
  • the flexible composite 2 may be used in structural applications, but finds particular application as a line or tape for measuring, marking or surveying equipment.
  • One or more layers 8 of a flexible covering material, such as a polymer material may be provided on the composite 2. Such one or more layers 8 may provide protection for the composite 2 or may incorporate markings or measurement data for use when the composite 2 is applied as a line or tape for measuring, marking or surveying equipment.
  • the resulting composite will have a generally rectangular cross-section, that is it will be in the form of a tape or a sheet.
  • the flexible composite 2 is manufactured with the aid of an apparatus as shown in Figure 2 using a continuous pultrusion process.
  • a carbon fibre tow 4 is unwound as required from a reel 12, the reel being mounted on a base 14 which is rotatable about an upright axis to enable a twist to be imparted to the tow 4 as it is unwound.
  • the tow 4 may be in the form of a high modulus 6K unidirectional tow.
  • the twisted tow 4 is aligned by way of an aperture in a supporting framework for the apparatus and passes downwardly through a resin tank 16 in which the tow continues to twist and which is provided with an aperture in the form of a coating die 18 at the lower end thereof.
  • the coating die has a diameter of about 0.75 mm.
  • the resin tank 16 is initially filled with UV curable prepolymeric material to a predetermined level and the predetermined level is maintained by supplying further prepolymeric material from a storage tank 20 by means of a metering pump 22.
  • the tow, impregnated with the prepolymeric material then passes downwardly into a curing means in the form of a UV curing oven 24 where the prepolymeric material is cured to form the desired flexible composite 2.
  • the speed at which the tow is drawn through the resin tank 16, coating die 18 and curing oven 24 is determined by speed control means in the form of a speed-controlled hauler 26 through which the composite 2 passes.
  • the speed of the hauler 26 can be controlled to ensure the tow 4 is fully coated and impregnated with the prepolymeric material and to ensure the curing time in the oven 24 is sufficient, but not excessive .
  • the flexible composite is wound (accumulated) on a reel 28 by means of a suitable drive 30.
  • a suitable drive 30 we have found the use of a separate drive 30 to be significant in enabling constant speed of the tow through the resin tank 16, coating die 18 and curing oven 24 to be maintained.
  • a prepolymeric material for example of a type used in the manufacture of optical fibres, was found to be preferable to thermoplastic or thermosetting plastics materials.
  • Suitable prepolymeric materials include multifunctional urethane/acrylic resin materials which may contain trimethylolpropane triacrylate and ethoxyethoxyethyl acrylate.
  • prepolymeric materials can be polymerised using thermal or UV initiators, UV initiators were considered to be preferable due to a wider processing window and more rapid curing.

Abstract

A flexible high strength composite comprises at least one carbon fibre tow (4), comprising filaments of carbon fibre material, impregnated in a flexible polymeric matrix (6). The composite is made by passing the at least one tow through a tank (16) of impregnating material. Twisting means (12, 14) is provided for twisting the at least one tow (4) as it passes through the impregnating material in the tank (16). The impregnated tow is then cured in curing means (24) so as to cure the impregnating material applied to the tow (4) to form the flexible polymeric matrix (6).

Description

METHOD AND APPARATUS FOR MANUFACTURING A FLEXIBLE HIGH STRENGTH COMPOSITE
This invention concerns a method and an apparatus for manufacturing a flexible high strength composite which is suitable for use, for example, in structural applications, or as a line or tape such as for measuring, marking or surveying equipment.
According to one aspect of the present invention there is provided a method of manufacturing a flexible high strength composite comprising at least one carbon fibre tow, comprising filaments of carbon fibre material, impregnated in a flexible polymeric matrix, the method comprising the steps of:
passing the at least one tow through a tank of impregnating material;
twisting the at least one tow as it passes through the impregnating material; and
curing the impregnating material applied to the at least one tow to form the flexible polymeric matrix.
According to another aspect of the present invention there is provided an apparatus for manufacturing a flexible high strength composite comprising at least one carbon fibre tow, comprising filaments of carbon fibre material, impregnated in a flexible polymeric matrix, the apparatus comprising:
means for supplying at least one tow;
a tank for impregnating material; means for twisting the at least one tow as it passes through the tank; and
curing means for curing the impregnating material applied to the at least one tow to form the flexible polymeric matrix.
The twisted tow may have up to about 150 or more twists per metre.
The at least one tow may be passed downwardly through the tank of impregnating material, the at least one tow exiting the tank through an aperture at a lower end of the tank.
Means may be provided to maintain the level of impregnating material in the tank substantially at a predetermined level .
The impregnating material may incorporate a diluent to reduce the viscosity thereof.
The impregnating material may comprise a prepolymeric material. The prepolymeric material may be polymerisable with a UV initiator or with a thermal initiator.
The impregnated tow may be passed downwardly through a curing means.
Means may be provided downstream of the curing means for controlling the speed of the tow through the tank and through the curing means .
Means may be provided to accumulate the flexible composite. The flexible composite may be used, for example, in structural applications or as a line or tape such as for measuring, marking or surveying equipment, or as a high strength flexible conductor.
For a better understanding of the invention and to show more clearly how it may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:
Figure 1 is a perspective view of an embodiment of a flexible high strength composite made in accordance with the present invention; and
Figure 2 is a schematic illustration of an apparatus according to the present invention for manufacturing a flexible high strength composite.
Referring first to the Figure 1, a flexible high strength composite 2 comprises at least one carbon fibre tow 4, comprising filaments of carbon fibre material, encapsulated in a flexible polymeric matrix 6.
As shown, a plurality of carbon fibre tows 4 are provided, which may be of straight (i.e. unidirectional) form, or of twisted form, and which may each be of circular or rectangular cross-section.
Each of the carbon fibre tows 4 comprises filaments of carbon fibre material which suitably comprises a turbostratic structure of carbon which may be formed from one or more precursors such as mesophase pitch or polyacrylonitrile polymer. As many as one thousand tows 4 may be provided in the composite 2. One or more of the tows 4 may incorporate filaments of an alternative material to provide specific properties to the resulting composite. For example, optical fibres may be incorporated so that optical signals may be sent along the composite.
Each tow 4 suitably comprises from 50 to 12000 filaments of carbon fibre material, each having a diameter of between 0.05 and 20 microns and suitably of about 7 microns .
If the tows 4 are of twisted form, up to about 150 twists per metre may be provided. In a typical twisted form of construction, about 100 twists per metre are provided.
If the tows are of braided form, such braided form may be arranged such that some of the tows 4 are interwoven in braided form around one or more central tows, that is, in the form of maypole braiding. Alternatively, the tows 4 may be braided in situ.
The flexible polymeric matrix 6 comprises a material which preferably wets the carbon fibre filaments of the tows 4 and preferably encapsulates each individual filament of the tows 4.
The flexible polymeric matrix 6 is arranged to adhere to the carbon fibre filaments of the tows 4. Such adhesion may be by means of an adhesive material, but is suitably by means of chemical bonding between material of the flexible polymeric matrix 6 and the carbon fibre filaments of the tows 4. A substantially uniform distribution of the carbon fibre filaments of the tows 4 is preferably provided within the flexible polymeric matrix 6.
The flexible polymeric matrix β suitably comprises an elastomer, or a thermoplastic plastics material, or a thermosetting plastics material.
A suitable elastomer comprises polyurethane or silicone rubber.
A suitable thermoplastic plastics material comprises methacrylate, or tri ethylolpropane triacrylate, or ethoxyethoxyethyl acrylate, or polyvinylchloride. Flexibilised derivatives of thermoplastic plastics materials may also be used.
A suitable thermosetting plastics comprises vinyl ester, a flexible derivative of a polyester resin, or flexibilised epoxy material.
The flexible polymeric matrix 6 may be applied as a prepolymeric resin material which impregnates the tow 4 and is subsequently polymerised, such as by heating or by means of applied radiation, such as ultra-violet radiation.
The resulting flexible composite 2 exhibits high tensile strength and high axial stiffness. It is also light in weight and exhibits high flexibility, having a low bend radius: that is, the flexible composite can be distorted repeatedly without failure of the composite. It also exhibits low thermal expansion. In a particular example, a composite 2 is in the form of a line incorporating tows 4 with six thousand filaments and with a loading of carbon fibre to polymeric matrix β of about 80 percent. Such composite has an overall cross sectional area of about 2.9 x 10"7 square metres, a tensile strength of about 3 to 4 GPa and an axial stiffness of about 300 GPa. The composite has a bend diameter of about 10mm where there is one twist in the tow every 30mm.
The flexible composite 2 may be used in structural applications, but finds particular application as a line or tape for measuring, marking or surveying equipment.
One or more layers 8 of a flexible covering material, such as a polymer material may be provided on the composite 2. Such one or more layers 8 may provide protection for the composite 2 or may incorporate markings or measurement data for use when the composite 2 is applied as a line or tape for measuring, marking or surveying equipment.
Where the tow or tows 4 are braided or are otherwise laid in a generally planar (sheet-like) arrangement the resulting composite will have a generally rectangular cross-section, that is it will be in the form of a tape or a sheet.
The flexible composite 2 is manufactured with the aid of an apparatus as shown in Figure 2 using a continuous pultrusion process.
A carbon fibre tow 4 is unwound as required from a reel 12, the reel being mounted on a base 14 which is rotatable about an upright axis to enable a twist to be imparted to the tow 4 as it is unwound. By way of example, the tow 4 may be in the form of a high modulus 6K unidirectional tow.
The twisted tow 4 is aligned by way of an aperture in a supporting framework for the apparatus and passes downwardly through a resin tank 16 in which the tow continues to twist and which is provided with an aperture in the form of a coating die 18 at the lower end thereof. The coating die has a diameter of about 0.75 mm.
The resin tank 16 is initially filled with UV curable prepolymeric material to a predetermined level and the predetermined level is maintained by supplying further prepolymeric material from a storage tank 20 by means of a metering pump 22.
The tow, impregnated with the prepolymeric material, then passes downwardly into a curing means in the form of a UV curing oven 24 where the prepolymeric material is cured to form the desired flexible composite 2. The speed at which the tow is drawn through the resin tank 16, coating die 18 and curing oven 24 is determined by speed control means in the form of a speed-controlled hauler 26 through which the composite 2 passes. The speed of the hauler 26 can be controlled to ensure the tow 4 is fully coated and impregnated with the prepolymeric material and to ensure the curing time in the oven 24 is sufficient, but not excessive .
Finally, the flexible composite is wound (accumulated) on a reel 28 by means of a suitable drive 30. In this respect, we have found the use of a separate drive 30 to be significant in enabling constant speed of the tow through the resin tank 16, coating die 18 and curing oven 24 to be maintained.
When a flexible composite 2 was made with an untwisted tow and a flexible resin, it was found that when bent in flexural mode the composite buckled and kinked at bend radii about five times higher than the radius of the composite 2. Kinking also gave rise to separation of filaments of the tow such that the composite was permanently damaged. In use, the reel was rotated so as to impart either 88-90 turns per metre or 45-47 turns per metre, although other degrees of twist may be employed, for example up to 150 or more turns per metre. In each case the bend radius was reduced and the tendency to kink was reduced, although the composite with the greater number of twists was found to be more flexible and to have better shape retention. This is because twisting makes a bundle of fibres more flexible in that it allows the individual filaments in the bundle to move and displace more readily and to distribute the predominantly shear loads in the composite.
In addition, the nature of the flexible polymeric matrix 6 was found to be important. The difficulty in achieving a small bend radius and low bend stiffness are related to the flexibility of the polymeric matrix. A prepolymeric material, for example of a type used in the manufacture of optical fibres, was found to be preferable to thermoplastic or thermosetting plastics materials. Suitable prepolymeric materials include multifunctional urethane/acrylic resin materials which may contain trimethylolpropane triacrylate and ethoxyethoxyethyl acrylate. Although prepolymeric materials can be polymerised using thermal or UV initiators, UV initiators were considered to be preferable due to a wider processing window and more rapid curing. It was also advantageous to dilute the prepolymeric material with a suitable diluent, such as HEMA (2hydroxyethylmethacrylate - CH2C(CH3)COOHCH2CH2OH) to reduce the viscosity of the prepolymeric material in order to increase the rate at which the tow can be impregnated.
We have found the continuous twisting of the tow as it passes through the resin tank 16 significantly improves impregnation of the prepolymeric material into the tow. The twisting of the fibres of the tow draws the prepolymeric resin material into the bundle of fibres, thereby allowing the individual fibres to be coated before the tow is tightened into a twisted configuration.

Claims

1. A method of manufacturing a flexible high strength composite comprising at least one carbon fibre tow (4), comprising filaments of carbon fibre material, impregnated in a flexible polymeric matrix (6) characterised by the steps of:
passing the at least one tow (4) through a tank (16) of impregnating material;
twisting the at least one tow as it passes through the impregnating material; and
curing the impregnating material applied to the at least one tow to form the flexible polymeric matrix (6) .
2. A method according to claim 1, characterised in that up to about 150 or more twists per metre are provided.
3. A method according to claim 1 or 2, characterised in that the at least one tow is passed downwardly through the tank (16) of impregnating material, the at least one impregnated tow exiting the tank through an aperture at a lower end thereof
4. A method according to claim 1, 2 or 3, characterised in that means (20, 22) is provided to maintain the level of impregnating material in the tank (16) substantially at a predetermined level.
5. A method according to any preceding claim, characterised in that the impregnating material incorporates a diluent to reduce the viscosity thereof.
6. A method according to any preceding claim, characterised in that the impregnating material comprises a prepolymeric material.
7. A method according to claim 6, characterised in that the prepolymeric material is polymerisable with a UV initiator.
8. A method according to claim 6, characterised in that the prepolymeric material is polymerisable with a thermal initiator.
9. A method according to any preceding claim, characterised by the step of passing the impregnated tow downwardly through a curing means (24) .
10. A method according to any preceding claim, characterised in that means (26) is provided downstream of the curing means (24) for controlling the speed of the tow (4) through the tank (16) and through the curing means .
11. A method according to any preceding claim, characterised in that means (28, 30) is provided to accumulate the flexible composite (2) .
12. Apparatus for manufacturing a flexible high strength composite comprising at least one carbon fibre tow (4), comprising filaments of carbon fibre material, impregnated in a flexible polymeric matrix (6) characterised by:
means for supplying at least one tow (4);
a tank (16) for impregnating material; means (12, 14) for twisting the at least one tow (4) as it passes through the tank (16) ; and
curing means (24) for curing the impregnating material applied to the at least one tow (4) to form the flexible polymeric matrix (6) .
13. An apparatus as claimed in claim 12, characterised in that the twisting means (12, 14) is adapted to apply up to about 150 or more twists per metre to the tow (4) .
14. An apparatus as claimed in claim 12 or 13, characterised in that the tank (16) has an upper inlet and a lower outlet for the at least one tow (4) such that the tow passes downwardly through the tank thereby becoming impregnated with the impregnating material.
15. An apparatus as claimed in claim 12, 13 or 14, characterised in that means (20, 22) is provided to maintain the level of impregnating material in the tank (16) substantially at a predetermined level.
16. An apparatus as claimed in any one of claims 12 to
15, characterised in that the impregnating material incorporates a diluent to reduce the viscosity thereof.
17. An apparatus as claimed in any one of claims 12 to
16, characterised in that the impregnating material comprises a prepolymeric material.
18. An apparatus as claimed in claim 17, characterised in that the prepolymeric material is polymerisable with a UV initiator.
19. An apparatus as claimed in claim 17, characterised in that the prepolymeric material is polymerisable with a thermal initiator.
20. An apparatus as claimed in any one of claims 12 to
19, characterised in that means is provided for passing the impregnated tow downwardly through a curing means (24) .
21. An apparatus as claimed in any one of claims 12 to
20, characterised in that means (26) is provided downstream of the curing means (24) for controlling the speed of the tow (4) through the tank (16) and through the curing means .
22 . An apparatus as claimed in any one of claims 12 to 21 , characterised in that means ( 28 , 30 ) is provided to accumulate the flexible composite (2 ) .
PCT/GB2002/001950 2001-04-27 2002-04-29 Method and apparatus for manufacturing a flexible high strength composite WO2002087840A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0110351.4A GB0110351D0 (en) 2001-04-27 2001-04-27 Flexible high strength composite
GB0110351.4 2001-04-27

Publications (1)

Publication Number Publication Date
WO2002087840A1 true WO2002087840A1 (en) 2002-11-07

Family

ID=9913578

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/001950 WO2002087840A1 (en) 2001-04-27 2002-04-29 Method and apparatus for manufacturing a flexible high strength composite

Country Status (2)

Country Link
GB (1) GB0110351D0 (en)
WO (1) WO2002087840A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004103664A1 (en) * 2003-05-23 2004-12-02 Sia Abrasive Industries Ag Method for producing compressed plastic-coated fibre strands
WO2023156728A1 (en) * 2022-02-18 2023-08-24 Safran Method for manufacturing an instrumented strand
FR3139492A1 (en) * 2022-09-12 2024-03-15 Safran Process for manufacturing an instrumented strand

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853021A (en) * 1986-12-04 1989-08-01 Vetrotex Saint-Gobain Process and apparatus for producing coated single twist glass yarns
WO1993015893A1 (en) * 1992-02-06 1993-08-19 Vetrotex France S.A. Process for the manufacture of a composite thread and composite products obtained from said thread
US5639307A (en) * 1995-01-17 1997-06-17 Electrostatic Technology, Inc. Fiber bundle coating apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853021A (en) * 1986-12-04 1989-08-01 Vetrotex Saint-Gobain Process and apparatus for producing coated single twist glass yarns
WO1993015893A1 (en) * 1992-02-06 1993-08-19 Vetrotex France S.A. Process for the manufacture of a composite thread and composite products obtained from said thread
US5639307A (en) * 1995-01-17 1997-06-17 Electrostatic Technology, Inc. Fiber bundle coating apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004103664A1 (en) * 2003-05-23 2004-12-02 Sia Abrasive Industries Ag Method for producing compressed plastic-coated fibre strands
WO2023156728A1 (en) * 2022-02-18 2023-08-24 Safran Method for manufacturing an instrumented strand
FR3139492A1 (en) * 2022-09-12 2024-03-15 Safran Process for manufacturing an instrumented strand

Also Published As

Publication number Publication date
GB0110351D0 (en) 2001-06-20

Similar Documents

Publication Publication Date Title
CA1302674C (en) Method and apparatus of manufacturing a cable-like plastic composite body
EP2123701B1 (en) Process for producing a round fiber-reinforced plastic wire
EP0018401B1 (en) Strength members for the reinforcement of optical fibre cables
EP0417612B1 (en) Filament-reinforced resinous structural rod
EP0375896A2 (en) Twisted FRP structure and process for manufacturing the same
JPS61194276A (en) Composite reinforcing member and method and apparatus for producing the same
WO2003091008A1 (en) Aluminum conductor composite core reinforced cable and method of manufacture
CN101932430A (en) Flexible continuous tape and manufacture method thereof by the multifilament manufacturing
WO2022007705A1 (en) Elastomer-bonded fiber-reinforced composite wire material and preparation method therefor
JP3058897B2 (en) Method for producing fiber-reinforced curable resin fine filaments
WO2002087840A1 (en) Method and apparatus for manufacturing a flexible high strength composite
JP2869116B2 (en) Fiber-reinforced thermosetting resin-made twisted structure and method for producing the same
US20220269028A1 (en) Optical Fiber Protective Composite Coating
JP2000254978A (en) Production of frp fine stripe conductor
JP2984021B2 (en) Fiber-reinforced thermosetting resin-made twisted structure and method for producing the same
JP3770936B2 (en) Concrete structural reinforcement and concrete structural reinforcement method using the same
JP3327984B2 (en) Method for producing fiber-reinforced resin shaped rods
KR100345081B1 (en) Hybrid bar fabric
JP2020144201A (en) Forming body
JP2585165B2 (en) Method for producing flexible composite twisted tensile strength strip
JP2516714B2 (en) Method for manufacturing composite twisted strength member
JPH0428082Y2 (en)
JP2008307720A (en) Fiber-reinforced composite material molding method and fiber-reinforced composite material
WO2022013750A1 (en) Reinforced structural component or flexible tie rod
JP3421956B2 (en) Method for producing flexible structural material

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1) EPC

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP