US3533741A - Process for the production of filamentary carbon - Google Patents

Process for the production of filamentary carbon Download PDF

Info

Publication number
US3533741A
US3533741A US729927A US3533741DA US3533741A US 3533741 A US3533741 A US 3533741A US 729927 A US729927 A US 729927A US 3533741D A US3533741D A US 3533741DA US 3533741 A US3533741 A US 3533741A
Authority
US
United States
Prior art keywords
carbon
filamentary
filaments
temperature
filamentary material
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.)
Expired - Lifetime
Application number
US729927A
Inventor
Francis James Higgins
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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 Courtaulds PLC filed Critical Courtaulds PLC
Application granted granted Critical
Publication of US3533741A publication Critical patent/US3533741A/en
Assigned to COURTAULDS, PLC reassignment COURTAULDS, PLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE MARCH 1, 1982. Assignors: COURTAULDS, LIMITED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
    • D01F9/24—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F9/26—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds from polyesters
    • 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
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • 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
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/16—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate
    • 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
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
    • D01F9/21—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F9/22—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles
    • 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
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
    • D01F9/24—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F9/28—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds from polyamides
    • 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
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/32—Apparatus therefor
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/19—Inorganic fiber

Definitions

  • This invention relates to a process for the production of filamentary carbon and in particular to a process for producing filamentary carbon which enables it to be handled during the production process and thereafter-with minimal damage.
  • Carbon filaments may be produced by subjecting organic filamentary material to a series of treatments under specific conditions of temperature and surrounding atmosphere.
  • the organic filamentary material may be subjected to heating at a temperature which may be in the range from 200 to 300 C. in an atmosphere of air, air enriched with oxygen or nitrogen.
  • the so-treated filamentary material may then be heated at a temperature in excess of 1000 C. in an inert atmosphere to produce carbon filaments which may be graphitised at a temperature in excess of 2000 C. also in an inert atmosphere.
  • Carbon filaments and especially graphite filaments have considerable tensile strength and elastic modulus values but at all stages in their production and especially in the early stages they require to be handled with care to avoid breakage of individual filaments in a bundle.
  • a process for the production of filamentary carbon comprises heating organic filamentary material at a temperature in the range from about 200 to 300 C. in an atmosphere of air, air enriched with oxygen or nitrogen, wrapping the so-treated filamentary material in a cloth made from carbon filaments or fibres, and heating the package so obtained at a temperature in excess of 1000 C. in an inert atmosphere to carbonise the filamentary material.
  • the first stage results in a filamentary product which can be bent during handling, and if a bent filamentary product is subsequently carbonised it exhibits corresponding kinks which are substantially impossible to remove. It is found that wrapping a bundle of filamentary material treated in the first stage of the process in carbon cloth protects the first stage filamentary material from bending, and the carbonised filaments produced therefrom do not show permanent kinks.
  • the second stage of treatment carried out while the filamentary material is wrapped in carbon cloth, it is heated in an inert atmosphere to a temperature in excess of 1000 C., and becomes carbonised.
  • Such carbonised filaments may be satisfactory for many purposes, but in order to develop the most valuable properties it may be desired to graphitise them.
  • This may be achieved by transferring the package to a high temperature furnace in which it is heated to a temperature in excess of 2000" C,, preferably in excess of 2500 C., in an inert atmosphere.
  • the package, after carbonisation or after graphitisation may be used entirely for despatching the filaments, when it may be handled with minimal damage to the filaments.
  • Carbon cloth may be made from continuous filaments or staple carbon fibres which may be produced in a manner similar to the filamentary carbon produced by the process of this invention, or by any other suitable method.
  • the cloths may be made of carbonised filaments or fibres or they may have been graphitised. Carbonised cloths may exhibit weight loss and dimensional change when heated above 2000 C. but such changes do not interfere with the process of the invention, and they are irreversible. Accordingly after the first treatment of the cloth in a graphitisation stage no further changes will occur on subsequent heating above 2000" C.
  • the filamentary carbon produced in the process of the invention may be made, for example, from cellulosic, polyamide or polyester materials or from substantially any other organic filamentary material, the structure of which includes a carbon to carbon backbone. It is however, preferred to use filamentary material consisting wholly and mainly of polyacrylonitrile.
  • the carbon cloth may have been produced in a similar manner from any of the above mentioned organic filamentary materials.
  • the invention is particularly suitable for the production of staple carbon filaments, for example those having a staple length up to about 10 feet.
  • a process for the production of filamentary carbon which comprises heating organic filamentary material at a temperature in the range from about 200 to 300 C. in an atmosphere of air, air enriched with oxygen, or nitrogen, wrapping the so-treated filamentary material in a cloth made from carbon filaments or fibres and heating the package so obtained at a temperature in excess of 1000 C. in an inert atmosphere to carbonise the filamentary material.
  • organic filamentary material is made from cellulosic, polyamide or polyester material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Inorganic Fibers (AREA)

Description

United States Patent Oflice Patented Oct. 13, 1970 3,533,741 PROCESS FOR THE PRODUCTION OF FILAMENTARY CARBON Francis James Higgins, Kenilworth, Warwickshire, England, assignor to Courtaulds Limited, London, England, a British company No Drawing. Filed May 17, 1968, Ser. No. 729,927 Claims priority, application Great Britain, May 26, 1967, 24,605/ 67 Int. Cl. C01b 31/07 US. Cl. 23-2091 8 Claims ABSTRACT OF THE DISCLOSURE A process for the production of filamentary carbon which comprises heating organic filamentary material, for example of cellulosic, polyamide, polyester or polyacrylonitrile material, at a temperature inthe range from about 200 to 300 C. in an atmosphere of air, air enriched with oxygen, or nitrogen, wrapping the so-treated filamentary material in a cloth made from carbon filaments or fibres and heating the package so obtained at a temperature in excess of 1000 C. in an inert atmosphere to carbonise the filamentary material. The package of carbonised filamentary material wrapped in carbon cloth may be subjected to a further heat treatment at a temperature in excess of 2000 C. in an inert atmosphere.
This invention relates to a process for the production of filamentary carbon and in particular to a process for producing filamentary carbon which enables it to be handled during the production process and thereafter-with minimal damage.
Carbon filaments may be produced by subjecting organic filamentary material to a series of treatments under specific conditions of temperature and surrounding atmosphere. Thus, in a first stage, the organic filamentary material may be subjected to heating at a temperature which may be in the range from 200 to 300 C. in an atmosphere of air, air enriched with oxygen or nitrogen. The so-treated filamentary material may then be heated at a temperature in excess of 1000 C. in an inert atmosphere to produce carbon filaments which may be graphitised at a temperature in excess of 2000 C. also in an inert atmosphere. Carbon filaments and especially graphite filaments have considerable tensile strength and elastic modulus values but at all stages in their production and especially in the early stages they require to be handled with care to avoid breakage of individual filaments in a bundle.
According to the invention a process for the production of filamentary carbon comprises heating organic filamentary material at a temperature in the range from about 200 to 300 C. in an atmosphere of air, air enriched with oxygen or nitrogen, wrapping the so-treated filamentary material in a cloth made from carbon filaments or fibres, and heating the package so obtained at a temperature in excess of 1000 C. in an inert atmosphere to carbonise the filamentary material.
During the process of manufacture of filamentary carbon the first stage results in a filamentary product which can be bent during handling, and if a bent filamentary product is subsequently carbonised it exhibits corresponding kinks which are substantially impossible to remove. It is found that wrapping a bundle of filamentary material treated in the first stage of the process in carbon cloth protects the first stage filamentary material from bending, and the carbonised filaments produced therefrom do not show permanent kinks. In the second stage of treatment, carried out while the filamentary material is wrapped in carbon cloth, it is heated in an inert atmosphere to a temperature in excess of 1000 C., and becomes carbonised. Such carbonised filaments may be satisfactory for many purposes, but in order to develop the most valuable properties it may be desired to graphitise them. This may be achieved by transferring the package to a high temperature furnace in which it is heated to a temperature in excess of 2000" C,, preferably in excess of 2500 C., in an inert atmosphere. The package, after carbonisation or after graphitisation may be used entirely for despatching the filaments, when it may be handled with minimal damage to the filaments.
Carbon cloth may be made from continuous filaments or staple carbon fibres which may be produced in a manner similar to the filamentary carbon produced by the process of this invention, or by any other suitable method. The cloths may be made of carbonised filaments or fibres or they may have been graphitised. Carbonised cloths may exhibit weight loss and dimensional change when heated above 2000 C. but such changes do not interfere with the process of the invention, and they are irreversible. Accordingly after the first treatment of the cloth in a graphitisation stage no further changes will occur on subsequent heating above 2000" C.
The filamentary carbon produced in the process of the invention may be made, for example, from cellulosic, polyamide or polyester materials or from substantially any other organic filamentary material, the structure of which includes a carbon to carbon backbone. It is however, preferred to use filamentary material consisting wholly and mainly of polyacrylonitrile. The carbon cloth may have been produced in a similar manner from any of the above mentioned organic filamentary materials. The invention is particularly suitable for the production of staple carbon filaments, for example those having a staple length up to about 10 feet.
What is claimed is:
1. A process for the production of filamentary carbon which comprises heating organic filamentary material at a temperature in the range from about 200 to 300 C. in an atmosphere of air, air enriched with oxygen, or nitrogen, wrapping the so-treated filamentary material in a cloth made from carbon filaments or fibres and heating the package so obtained at a temperature in excess of 1000 C. in an inert atmosphere to carbonise the filamentary material.
2. The process as claimed in claim 1 in which the organic filamentary material is made from cellulosic, polyamide or polyester material.
3. The process as claimed in claim 1 in which the organic filamentary material comprises filaments consisting wholly or mainly of polyacrylonitrile.
4. The process as claimed in claim 1 in which the cloth made from carbon filaments or fibres is produced from filaments or fibres of cellulosic, polyamide, polyester or polyacrylic materials.
5. The process as claimed in claim 1 in which the cloth made from carbon filaments or fibres has been produced by heating organic filamentary material at a temperature in the range from about 200 to 300 C. in an atmosphere of air, air enriched with oxygen or nitrogen and subse- 3 quently heating the product at a temperature in excess of 1000 C. to carbonise the filaments or fibres.
6. The process as claimed in claim 1 in which the package of carbonised filamentary material wrapped in carbon cloth is further heated to a temperature in excess of 2000 C. in an inert atmosphere.
7. The process as claimed in claim 6 in which the further heating is carried out at a temperature in excess of 25 00 C. in an inert atmosphere.
8. The process as claimed in claim 1 in which the organic filamentary material is in the form of filaments of staple length up to 10 feet.
References Cited UNITED STATES PATENTS 12/1961 Soltes 23-209.1 X 9/1962 Abbott 252421 11/1966 Tsunoda 23-209.1 3/1967 Davila 23-2092 X 4/1967 Hogg et a1. 23209.1
US. Cl. X.R.
US729927A 1967-05-26 1968-05-17 Process for the production of filamentary carbon Expired - Lifetime US3533741A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24605/67A GB1218180A (en) 1967-05-26 1967-05-26 Carbon filaments

Publications (1)

Publication Number Publication Date
US3533741A true US3533741A (en) 1970-10-13

Family

ID=10214287

Family Applications (1)

Application Number Title Priority Date Filing Date
US729927A Expired - Lifetime US3533741A (en) 1967-05-26 1968-05-17 Process for the production of filamentary carbon

Country Status (2)

Country Link
US (1) US3533741A (en)
GB (1) GB1218180A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716332A (en) * 1970-07-27 1973-02-13 Ducommun Inc Carbonization of wool
US3888958A (en) * 1970-03-21 1975-06-10 Bergwerksverband Gmbh Process for making shaped pieces from low temperature coke of low bulk weight
US4351816A (en) * 1980-12-17 1982-09-28 Union Carbide Corporation Method for producing a mesophase pitch derived carbon yarn and fiber
US4571317A (en) * 1976-02-25 1986-02-18 United Technologies Corporation Process for producing binderless carbon or graphite articles
US4856179A (en) * 1983-04-21 1989-08-15 Hoechst Celanese Corp. Method of making an electrical device made of partially pyrolyzed polymer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619033A1 (en) * 1986-06-06 1987-12-10 Bayer Ag METHOD FOR PRODUCING FLOCK

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3011981A (en) * 1958-04-21 1961-12-05 Soltes William Timot Electrically conducting fibrous carbon
US3053775A (en) * 1959-11-12 1962-09-11 Carbon Wool Corp Method for carbonizing fibers
US3285696A (en) * 1960-08-25 1966-11-15 Tokai Denkyoku Seizo Kabushiki Method for the preparation of flexible carbon fibre
US3308943A (en) * 1963-08-05 1967-03-14 Davila Eugene Method of packaging purified graphite and the package formed thereby
US3313596A (en) * 1963-07-26 1967-04-11 Great Lakes Carbon Corp Carbonization of fibrous rayon

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3011981A (en) * 1958-04-21 1961-12-05 Soltes William Timot Electrically conducting fibrous carbon
US3053775A (en) * 1959-11-12 1962-09-11 Carbon Wool Corp Method for carbonizing fibers
US3285696A (en) * 1960-08-25 1966-11-15 Tokai Denkyoku Seizo Kabushiki Method for the preparation of flexible carbon fibre
US3313596A (en) * 1963-07-26 1967-04-11 Great Lakes Carbon Corp Carbonization of fibrous rayon
US3308943A (en) * 1963-08-05 1967-03-14 Davila Eugene Method of packaging purified graphite and the package formed thereby

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888958A (en) * 1970-03-21 1975-06-10 Bergwerksverband Gmbh Process for making shaped pieces from low temperature coke of low bulk weight
US3716332A (en) * 1970-07-27 1973-02-13 Ducommun Inc Carbonization of wool
US4571317A (en) * 1976-02-25 1986-02-18 United Technologies Corporation Process for producing binderless carbon or graphite articles
US4351816A (en) * 1980-12-17 1982-09-28 Union Carbide Corporation Method for producing a mesophase pitch derived carbon yarn and fiber
US4856179A (en) * 1983-04-21 1989-08-15 Hoechst Celanese Corp. Method of making an electrical device made of partially pyrolyzed polymer

Also Published As

Publication number Publication date
GB1218180A (en) 1971-01-06

Similar Documents

Publication Publication Date Title
US3503708A (en) Graphite yarn
US3285696A (en) Method for the preparation of flexible carbon fibre
US3539295A (en) Thermal stabilization and carbonization of acrylic fibrous materials
US3723607A (en) Surface modification of carbon fibers
GB2168966A (en) High-strength carbonaceous fiber
JP4392432B2 (en) Method for producing carbonized fabric
US3533743A (en) Process for the manufacture of continuous high modulus carbon yarns and monofilaments
US3818082A (en) Process for the production of carbonaceous tapes
US3508874A (en) Production of carbon yarns
US3533741A (en) Process for the production of filamentary carbon
US3635675A (en) Preparation of graphite yarns
US3556729A (en) Process for oxidizing and carbonizing acrylic fibers
US3671192A (en) Method of stabilizing acrylic polymer fibers prior to graphitization
US3528774A (en) Formation of high modulus,high strength graphite yarns
US3764662A (en) Process for making carbon fiber
US3723150A (en) Surface modification of carbon fibers
US3677705A (en) Process for the carbonization of a stabilized acrylic fibrous material
US3333926A (en) Process for carbonizing cellulosic textile materials
US3716331A (en) Process for producing carbon fibers having a high young's modulus of elasticity
US3652221A (en) Process for producing carbon fibers
US3607059A (en) Process for the manufacture of filamentary carbon products
US3619139A (en) Manufacture of carbon filaments
EP0098025B1 (en) Process for producing polyacrylonitrile-based carbon fiber
JP2008169493A (en) Method for producing carbonized fabric and carbonized fabric obtained by the method
JPS6220281B2 (en)

Legal Events

Date Code Title Description
AS Assignment

Owner name: COURTAULDS, PLC

Free format text: CHANGE OF NAME;ASSIGNOR:COURTAULDS, LIMITED;REEL/FRAME:004415/0575

Effective date: 19820520