GB2106484A - Carbon fibres - Google Patents
Carbon fibres Download PDFInfo
- Publication number
- GB2106484A GB2106484A GB08217825A GB8217825A GB2106484A GB 2106484 A GB2106484 A GB 2106484A GB 08217825 A GB08217825 A GB 08217825A GB 8217825 A GB8217825 A GB 8217825A GB 2106484 A GB2106484 A GB 2106484A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fibre
- carbon fibre
- corona
- voltage
- corona discharge
- 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- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/10—Chemical after-treatment of artificial filaments or the like during manufacture of carbon
- D01F11/16—Chemical after-treatment of artificial filaments or the like during manufacture of carbon by physicochemical methods
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Carbon fibre material, for example carbon filaments or sheets tape, roving and such woven or spun from such carbon filaments, is treated with an electrical corona discharge, for example to so modify its surface structure as to improve its wetability and adhesion properties with respect to curable resin or plastics material.
Description
SPECIFICATION
Treating carbon fibre
This invention relates to the treatment of carbon fibre, in filamentary, woven or spun form or in the form of say tape pre-impregnated with resin, particularly but not exclusively to improve or control the adhesion to the fibre of resin or curable plastics material with which the fibre is used to make fibre reinforced plastics items.
In the invention the fibre is treated by subjecting it to the action of a corona discharge.
For a better understanding of the invention reference will now be made by way of example, to the accompanying drawings, in which: figure 1 is a simplified electrical diagram of single-stage treatment apparatus,
figure 2 is a simplified electrical diagram of two-stage treatment apparatus, and
figures 3 and 4 are diagrammatic views of the single and two-stage apparatus respectively.
In figure 1, a mains supply is fed via switch 1, fuses 2, a current transformer 3 connected to an ammeter 4, and a controller 5 for example a
Variac (trade Name), to the "240,440,550" Volt primary winding of a transformer 1 6, of which transformer, the 1 5KV secondary winding is connected between the shaft of a roller 6 made of insulating material or having an insulating surface and a light-alloy shoe 7 adjustably mounted on high voltage insulators (not shown).
As shown in figure 3, carbon fibre 8 from reel 9 is led via guide 10 and spreader/tension rollers 11 to the roller 6 where a corona discharge is applied via shoe 7, and thence via further spreader/tension rollers 12 to a take-up reel 13.
As shown by figures 2 and 4, there may be two rollers 6 and shoes 7 supplied by the same or different high voltage source(s) and operable to apply corona to the fibre material successively so that both sides of the material are treated.
The shaft(s) of roller(s) 6 may be earthed or isolated from earth.
As may be seen, the corona is produced by a supply which incorporates direct voltage variation of an Alternating Current which will result in the variable condition of the Carbon Fibres surface atomic structure, the supply further incorporating a low frequency high voltage single or multi-phase power source.
As a result of the variable control the Corona atmosphere will vary so as to change the atomic form of the fibre to suit varying requirements.
The process as described will change the
surface molecules to a varying degree to suit the
adhesion required for the specific task.
The apparatus illustrated provides for the treatment of surfaces of Carbon Fibres to allow
variable and better adhesion of synthetic Resins.
This is done by exposing the fibres to an electrical corona in either a single or double
process. The treatment will change the molecular structure of the material surface.
The varying voltage levels will afford varying levels of treatment, thus making a controllable grading system for the many different uses of
Carbon Fibre.
The single process system will treat up to 50% of the material surface.
The double process system will treat up to 100% of the material surface.
1. A method of treating carbon fibre material in which the material is subjected to the action of an electrical corona discharge.
2. A method according to claim 1, wherein said material is guided past a high-voltage corona discharge generator.
3. A method according to claim 2, wherein said material is guided past first one and then at least one more high-voltage corona-discharge generators.
4. A method according to claim 2 or 3, wherein said material is guided past the or each generator by being entrained over a respective roller comprising insulating material at least at its surface and positioned adjacent the associated generator.
5. A method according to claim 2, 3 or 4 wherein the spacing between said generator and means for guiding the material therepast is adjustable.
6. A method according to any preceding claim, wherein said electrical corona discharge is produced by high-voltage corona discharge generating means driven by voltage controllable electrical supply means, for example supply means comprising a variable-transformer.
7. A method of treating carbon fibre substantially as hereinbefore described with reference to the accompanying drawings.
8. Carbon fibre material which has been treated by the method of any preceding claim.
9. A carbon fibre reinforced plastics material article which has been made using the carbon fibre material of claim 8.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
1. A method of treating carbon fibre material in which the material is subjected to the action of an electrical corona discharge.
2. A method according to claim 1, wherein said material is guided past a high-voltage corona discharge generator.
3. A method according to claim 2, wherein said material is guided past first one and then at least one more high-voltage corona-discharge generators.
4. A method according to claim 2 or 3, wherein said material is guided past the or each generator by being entrained over a respective roller comprising insulating material at least at its surface and positioned adjacent the associated generator.
5. A method according to claim 2, 3 or 4 wherein the spacing between said generator and means for guiding the material therepast is adjustable.
6. A method according to any preceding claim, wherein said electrical corona discharge is produced by high-voltage corona discharge generating means driven by voltage controllable electrical supply means, for example supply means comprising a variable-transformer.
7. A method of treating carbon fibre substantially as hereinbefore described with reference to the accompanying drawings.
8. Carbon fibre material which has been treated by the method of any preceding claim.
9. A carbon fibre reinforced plastics material article which has been made using the carbon fibre material of claim 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08217825A GB2106484A (en) | 1981-06-19 | 1982-06-16 | Carbon fibres |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8119038 | 1981-06-19 | ||
GB08217825A GB2106484A (en) | 1981-06-19 | 1982-06-16 | Carbon fibres |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2106484A true GB2106484A (en) | 1983-04-13 |
Family
ID=26279863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08217825A Withdrawn GB2106484A (en) | 1981-06-19 | 1982-06-16 | Carbon fibres |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2106484A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002081790A1 (en) * | 2001-03-27 | 2002-10-17 | Hiform As | Spread-mixed composite fibre |
CN102839534A (en) * | 2012-08-30 | 2012-12-26 | 西北工业大学 | Surface modification method of carbon fiber by plasma treatment and coating of nano graphene |
CN102851939A (en) * | 2012-09-21 | 2013-01-02 | 华南理工大学 | Method and device for continuously processing surface of carbon fiber |
CN103015154A (en) * | 2012-12-03 | 2013-04-03 | 天津工业大学 | Method for improving tensile strength of carbon fiber by utilizing carbon nano tubes |
CN103046311A (en) * | 2012-12-03 | 2013-04-17 | 天津工业大学 | Method for improving carbon fiber tensile strength |
CN103938429A (en) * | 2014-04-28 | 2014-07-23 | 华南理工大学 | Corona discharge based carbon fiber surface treatment device and method |
-
1982
- 1982-06-16 GB GB08217825A patent/GB2106484A/en not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002081790A1 (en) * | 2001-03-27 | 2002-10-17 | Hiform As | Spread-mixed composite fibre |
CN102839534A (en) * | 2012-08-30 | 2012-12-26 | 西北工业大学 | Surface modification method of carbon fiber by plasma treatment and coating of nano graphene |
CN102839534B (en) * | 2012-08-30 | 2014-06-11 | 西北工业大学 | Surface modification method of carbon fiber by plasma treatment and coating of nano graphene |
CN102851939A (en) * | 2012-09-21 | 2013-01-02 | 华南理工大学 | Method and device for continuously processing surface of carbon fiber |
CN102851939B (en) * | 2012-09-21 | 2014-06-11 | 华南理工大学 | Method and device for continuously processing surface of carbon fiber |
CN103015154A (en) * | 2012-12-03 | 2013-04-03 | 天津工业大学 | Method for improving tensile strength of carbon fiber by utilizing carbon nano tubes |
CN103046311A (en) * | 2012-12-03 | 2013-04-17 | 天津工业大学 | Method for improving carbon fiber tensile strength |
CN103938429A (en) * | 2014-04-28 | 2014-07-23 | 华南理工大学 | Corona discharge based carbon fiber surface treatment device and method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |