EP3518621A1 - Fiber pre-oxidization device - Google Patents

Fiber pre-oxidization device Download PDF

Info

Publication number
EP3518621A1
EP3518621A1 EP18168096.8A EP18168096A EP3518621A1 EP 3518621 A1 EP3518621 A1 EP 3518621A1 EP 18168096 A EP18168096 A EP 18168096A EP 3518621 A1 EP3518621 A1 EP 3518621A1
Authority
EP
European Patent Office
Prior art keywords
fiber
oxidation
fiber yarn
oven body
yarn bunch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18168096.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Chih-Yung Wang
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.)
UHT Unitech Co Ltd
Original Assignee
UHT Unitech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UHT Unitech Co Ltd filed Critical UHT Unitech Co Ltd
Publication of EP3518621A1 publication Critical patent/EP3518621A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D01D10/0454—Supporting filaments or the like during their treatment while in continuous movement using reels
    • 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
    • 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
    • D01F9/322—Apparatus therefor for manufacturing filaments from pitch
    • 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
    • D01F9/328—Apparatus therefor for manufacturing filaments from polyaddition, polycondensation, or polymerisation products
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6491—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/78—Arrangements for continuous movement of material
    • H05B6/788—Arrangements for continuous movement of material wherein an elongated material is moved by applying a mechanical tension to it
    • 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
    • D01F9/145—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from pitch or distillation residues
    • 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
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/10—Inorganic fibres based on non-oxides other than metals
    • D10B2101/12—Carbon; Pitch
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/10—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/063—Load-responsive characteristics high strength
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
    • H05B2206/04—Heating using microwaves
    • H05B2206/044—Microwave heating devices provided with two or more magnetrons or microwave sources of other kind

Definitions

  • the present disclosure relates to a carbon fiber pre-oxidization technology, in particular to fiber pre-oxidization device of helping to enhance the performance of the carbon fiber.
  • the carbon fiber is a new carbon material with 90 % carbon concentration, in which the organic fiber is performed with sequential thermal processes to transform to such carbon fiber.
  • the carbon fiber has advantages of the high specific strength, the high specific modulus, the high conductivity and the thermal conductivity, the low thermal expansion coefficient, the low density, the high temperature resistance, the fatigue resistance, the creep resistance and the self-lubrication, and is an ideal function and structure material being widely used in the aerospace, civil aviation and transportation and other fields, thus having wide application prospects.
  • the carbon fiber preparing process using polyacrylonitrile (PAN) as the raw silk comprises polymerization, spinning, pre-oxidization and carbonization processes, wherein the pre-oxidization process is the key structure transformation stage of in the carbon fiber preparing process, and is the most time consuming stage in the thermal processing processes, which has the objective of transforming the linear macromolecular chains of polyacrylonitrile to the oxidation fiber with the thermal resistance structure, such that the oxidation fiber in the next carbonization will not burned and melted, and can maintain the fiber shape.
  • PAN polyacrylonitrile
  • the structure transformation of the raw silk in the pre-oxidization process mainly determines the structure and the performance of the carbon fiber.
  • the pre-oxidization process with gradient temperature increasing manner is mostly used, and the proper gradient temperature range in the process is required. If the initial temperature is too low, it will not contribute to the pre-oxidization process, and the consuming time will be increased to cause the large cost. By contrast, if the initial temperature is too high, the heat emission of the severe reaction will make the macromolecular chains of polyacrylonitrile be melted, wherein the macromolecular chains of polyacrylonitrile have no thermal resistance.
  • the termination temperature is too high, the concentrated heat emission destroys the structure of the pre-oxidization silk, and makes the pre-oxidization silk over oxidized, and thus it is hard to prepare the carbon fiber with high strength.
  • the termination temperature is too low, the raw silk is not pre-oxidized sufficiently.
  • the outer layer of the raw silk is firstly formed with an oxidization layer (i.e. the shell portion) having compact trapezoidal structure, and this prevents the oxygen from diffusing to the core portion of the raw silk.
  • an oxidization layer i.e. the shell portion
  • this causes an obviously differential shell-core structure between the oxidation layer 111 (shell portion) generated by oxidizing one fiber 11 in the oxidation fiber 10 and the core portion 112 being not oxidized, and a shell-core interface 113 exists between the oxidation layer 111 and the core portion 112.
  • the scanning electron microscope can photograph the substantial image to observe the cross section of the oxidation fiber and to respectively calculate the cross section areas of the oxidation layer, the core portion and the oxidation fiber.
  • the core portion degree (%) can be used to evaluate the degree of the shell-core structure, wherein the core portion degree is the value that the cross section area of the core portion divides the summation of the cross section areas of the oxidation layer and the core portion, i.e. the value that the cross section area of the core portion divides the cross section area of the oxidation fiber.
  • the physical properties of the oxidation fiber 10 and its manufactured carbon fiber are further determined by the oxidization degree and the cyclization degree of the oxidation fiber 10 or the oxidation layer 111. That is, the higher the oxidization degree and the cyclization degree of the oxidation fiber 10 or the oxidation layer 111 are, the higher the tensile strength and the tensile modulus of the carbon fiber manufactured by the oxidation fiber 10 are.
  • the oxidation layer 111 presents the oxidation status and the structure thereof is compact, such that the manufactured carbon fiber thereof has the high tensile strength and the high tensile modulus.
  • the core portion 112 presents the non-complete oxidation status or the non-oxidation status, and the structure thereof is loose, such that the manufactured carbon fiber thereof has the low tensile strength and the low tensile modulus. Since the oxidation layer 111 and the core portion 112 have the different oxidization degrees, the resulted shell-core structure is one important factor of lowering the tensile strength of the carbon fiber. Thus, how to shorten the pre-oxidization time in the pre-oxidization reaction process and how to simultaneously increase the pre-oxidization degree and eliminate the shell-core structure have importance of decreasing the carbon fiber manufacturing cost and increasing the performance (such as the tensile strength and the tensile modulus).
  • the present disclosure provides a fiber pre-oxidization device which has the main objectives of shortening the oxidization time of the oxidation fiber, efficiently eliminating the shell-core structure of the oxidation fiber, and even making the oxidation fiber have no obvious shell-core structure.
  • a fiber pre-oxidization device of the present disclosure is used to pre-oxidize a fiber yarn bunch to form an oxidation fiber yarn bunch.
  • the fiber yarn bunch is formed by merely one fiber, or alternatively, the fiber yarn bunch is formed by binding a plurality of fibers.
  • the oxidation fiber yarn bunch is formed by merely one oxidation fiber, or alternatively, the oxidation fiber yarn bunch is formed by binding a plurality of oxidation fibers.
  • the fiber pre-oxidization device basically comprises a transmitting unit and a microwave processing unit.
  • the transmitting unit is installed with a feeding unit, an oven body and a winder unit, wherein the feeding unit is used to provides the fiber yarn bunch, the oven body is used to pre-oxidize the fiber yarn bunch which passes the oven body to form the oxidation fiber yarn bunch, and the winder unit is used to drag the fiber yarn bunch for continuous transmission and to receive the oxidation fiber yarn bunch.
  • the microwave processing unit is disposed at the oven body and used to generate a microwave in interior of the of the oven body.
  • the microwave processing unit is further installed with a magnetron at the oven body for generating the microwave.
  • the microwave processing unit is further installed with a gas supplying unit for injecting gas with oxygen into the oven body.
  • the oven body further comprises a gas inlet and a gas outlet, wherein the gas supplying unit is connected to the gas inlet.
  • the oven body comprises a thermos unit.
  • thermos units are respectively disposed at top and bottom sides of the interior of the oven body in respective to a transmission path of the fiber yarn bunch.
  • thermos unit is disposed in the interior of the oven body for covering a transmission path of the fiber yarn bunch.
  • the winder unit, the magnetron and the gas supplying unit are electrically connected to a control unit.
  • microwave processing unit is installed with a plurality of magnetrons at the oven body for generating the microwave.
  • the magnetrons are disposed at single one side of the oven body.
  • the magnetrons are disposed at top and bottom sides of the oven body, and the magnetrons disposed on top and bottom sides of the oven body are arranged corresponding to each other
  • the magnetrons are disposed at top and bottom sides of the oven body, and the magnetrons disposed on top and bottom sides of the oven body are arranged in an offset manner
  • the magnetrons are disposed at top, bottom, left and right sides of the oven body.
  • the fiber yarn bunch is one of a polyacrylonitrile (PAN) fiber, a pitch fiber and other one organic fiber.
  • PAN polyacrylonitrile
  • the fiber pre-oxidization device disclosed by the present disclosure mainly uses the microwave processing unit to focus the microwave to apply the ultra-fast pre-oxidization process on the fiber yarn bunch, so as to process the fiber yarn bunch to form the oxidation fiber.
  • the oxidation layer in the oxidation fiber occupies more than 50 % of the cross section area of the oxidation fiber to efficiently reduce shell-core structure of the oxidation fiber.
  • the oxidation fiber even has no obvious shell-core structure. Accordingly, relatively positive and reliable means for increasing the performance of carbon fiber are provided.
  • the present disclosure mainly provides fiber pre-oxidization device which can shorten the oxidization time of the oxidation fiber, efficiently eliminate the shell-core structure of the oxidation fiber, and even make the oxidation fiber have no obvious shell-core structure.
  • the fiber pre-oxidization device of the present disclosure is adapted to pre-oxidize a fiber yarn bunch 20 to form an oxidation fiber yarn bunch 20A.
  • the fiber yarn bunch 20 is formed by merely one fiber (not shown in the drawings), or alternatively, the fiber yarn bunch is formed by binding a plurality of fibers.
  • the oxidation fiber yarn bunch 20A is formed by merely one oxidation fiber 21, or alternatively, the oxidation fiber yarn bunch is formed by binding a plurality of oxidation fibers 21.
  • the fiber pre-oxidization device comprises a transmitting unit 30 and a microwave processing unit 40.
  • the transmitting unit 30 is installed with a feeding unit 31, an oven body 33, a winder unit 32, a gas inlet 331 and a gas outlet 332.
  • the feeding unit 31 is used to provide the fiber yarn bunch 20.
  • the oven body 33 is used to pre-oxidize the fiber yarn bunch 20 which passes the oven body 33 to form the oxidation fiber yarn bunch 20A.
  • the winder unit 32 is used to drag the fiber yarn bunch 20 for continuous transmission and to receive the oxidation fiber yarn bunch20A.
  • the gas inlet 331 is disposed at a front end of the oven body 33, and the gas outlet 332 is disposed at a back end of the oven body 33.
  • the microwave processing unit 40 is installed with a magnetron 41 and a gas supplying unit 42, wherein the magnetron 41 is disposed at the oven body 33 for generating a microwave, and the gas supplying unit 42 is used to inject gas with oxygen into the oven body 33.
  • the gas supplying unit 42 is connected to the gas inlet 331 of the oven body 33, the gas with oxygen is injected into the oven body 33 via the gas inlet 331, and the gas outlet 332 of the oven body 33 is used to exhaust the gas.
  • the winder unit 32, the magnetron 41 and the gas supplying unit 42 are electrically connected to a control unit 50. Operations of the winder unit 32, the magnetron 41 and the gas supplying unit 42 are controlled by the control unit 50, and the spinning speed of the winder unit 32, the power of the magnetron 41 and flux of the gas supplying unit 42 are determined according to the property of the processed fiber yarn bunch 20 or the product specification.
  • the microwave processing unit 40 is installed with the magnetrons 41 at the oven body 33, wherein the magnetrons 41 are disposed at top and bottom sides of the oven body 33, and the magnetrons 41 disposed on the top and bottom sides of the oven body 33 are arranged corresponding to each other or in an offset manner, or alternatively, the magnetrons 41 disposed at single one side (top or bottom side) of the oven body 33.
  • the magnetrons 41 are disposed on top and bottom sides of the oven body 33, and the magnetrons 41 disposed on the top side are arranged corresponding to the magnetrons 41 disposed on the bottom side.
  • FIG. 2 the magnetrons 41 are disposed on top and bottom sides of the oven body 33, and the magnetrons 41 disposed on the top side are arranged corresponding to the magnetrons 41 disposed on the bottom side.
  • the magnetrons 41 disposed on the top side are arranged corresponding to the magnetrons 41 disposed on the bottom side, such that by simultaneously and uniformly irradiating the microwave on upper and lower portions of the fiber yarn bunch 20 which passes the oven body 33, the length of the oven body 33 can be further reduced, and the process time can be shortened to increasing the production speed.
  • the transmitting unit 30 of the present disclosure can be further installed with a thermos unit 34 in the interior of the oven body 33, and as shown in FIG. 2 , the thermal storage effect of the thermos unit 34 can be utilized, such that the interior of the oven body 33 can be keep at the predetermined operation temperature to achieve the objective of power saving.
  • thermos unit 34 are respectively disposed at top and bottom sides of the interior of the oven body 33 in respective to a transmission path of the fiber yarn bunch 20; or alternatively, as shown in FIG. 3 , the thermos unit 34 is disposed in the interior of the oven body 33 for covering the transmission path of the fiber yarn bunch 20, such that the fiber yarn bunch 20 is heated uniformly.
  • the thermos unit 34 can be selected from at least one of a metal oxide, a carbide and a high microwave sensitive material.
  • the feeding unit 31 provides the parallel arranged fiber yarn bunches 20 into the oven body 33.
  • the magnetrons 41 are respectively disposed at top and bottom sides of the transmission path of the fiber yarn bunch 20; or alternatively, the magnetrons 41 are disposed for covering the transmission path of the fiber yarn bunch 20, such that the microwave focusing process is uniformly performed on the fiber yarn bunch 20. That is, the magnetrons 41 are disposed at the top, bottom, left and right sides of the oven body 33.
  • the fiber pre-oxidization device can execute an oxidation fiber manufacturing method to efficiently shorten the oxidization time of the oxidation fiber, efficiently to eliminate the shell-core structure of the oxidation fiber, and even to make the oxidation fiber has no obvious shell-core structure.
  • the oxidation fiber manufacturing method can be referred in FIG. 4 , and comprises steps as follows.
  • Step a providing the transmitting unit 30 and the microwave processing unit 40.
  • Step b providing the fiber yarn bunch 20, disposing the fiber yarn bunch 20 on the transmitting unit 30, and making the transmitting unit 30 drive the fiber yarn bunch 20 to pass the microwave processing unit 40.
  • the winded fiber yarn bunch 20 can be disposed at the transmitting unit 30, so as to be continuously driven by the transmitting unit 30 to pass the operation region of the microwave processing unit 40.
  • the winded fiber yarn bunch 20 is disposed at the feeding unit 31, and the tail end of the fiber yarn bunch 20 is guided to pass the oven body 33 and then fixed on the winder unit 32, wherein the fiber yarn bunch 20 can be is one of a polyacrylonitrile (PAN) fiber, a pitch fiber and other one organic fiber.
  • PAN polyacrylonitrile
  • Step c activating the microwave processing unit 40, and using the microwave processing unit 40 to generate a microwaving condition.
  • the microwaving condition comprises: a microwave frequency being 300 MHz through 300,000 MHz; a microwave power being 1 kW/m 2 through 1000 kW/m 2 ; an operation temperature being 100 °C through 600 °C; and gas atmosphere being at least one of oxygen, air and ozone.
  • the gas atmosphere is the above gas with oxygen.
  • the gas supplying unit 42 is used to inject the gas with oxygen into the interior of the oven body 33.
  • Step d activating the transmitting unit 30, using the transmitting unit 30 to drive the fiber yarn bunch 20 to be exposed in the microwaving condition for a processing time, so as to transform the fiber yarn bunch 20 to the oxidation fiber yarn bunch 20A.
  • the fiber yarn bunch 20 is driven by the transmitting unit 30 to pass the operation region of the microwave processing unit 40 at the speed which the microwave focusing process is continuously applied for 1 minute through 40 minutes, and that is the processing time is 1 minute through 40 minutes.
  • the fiber yarn bunch 20 is driven by the transmitting unit 30 to pass the oven body 33 to form the oxidation fiber yarn bunch 20A at the speed which the microwave focusing process is continuously applied for 1 minute through 40 minutes.
  • the fiber yarn bunch 20 in the oven body 33 is winded and repeated to pass the oven body 33 to the oxidation fiber yarn bunch 20A at the speed which the microwave focusing process is continuously applied for 1 minute through 40 minutes.
  • the fiber yarn bunch 20 at the front end of the oven body 33 enters the interior of the oven body 33, and then is transmitted to the back end of the oven body 33.
  • the fiber yarn bunch 20 is transmitted from the back end of the oven body 33 to the front end of the oven body 33, and then is transmitted from the front end of the oven body 33 to the back end of the oven body 33 again.
  • the manner is used to repeat and wind the fiber yarn bunch 20 until the requirements is satisfied, and then the fiber yarn bunch 20 is sent out from the back end of the oven body 33 to form the oxidation fiber yarn bunch 20A.
  • the above used repeating and winding manner can sufficiently reduce the required length of the oven body 33.
  • the fiber yarn bunch 20 is driven to pass the operation region of the microwave processing unit 40 at the predetermined speed.
  • the microwave focusing process is continuously used to apply the ultra-fast pre-oxidization process on the fiber yarn bunch 20, so as to process the fiber yarn bunch 20 to form the oxidation fiber yarn bunch 20A.
  • the fiber yarn bunch 20 is formed by merely one fiber, or alternatively, the fiber yarn bunch 20 is formed by binding a plurality of fibers.
  • the oxidation fiber yarn bunch 20A is formed by merely one oxidation fiber, or alternatively, the oxidation fiber yarn bunch 20A is formed by binding a plurality of oxidation fibers.
  • the fiber pre-oxidization device of the present disclosure can be used to pre-oxidize the fiber o the fiber yarn bunch 20 to form the oxidation fiber 21.
  • the fiber yarn bunches 20 are respectively applied without the microwave and with the microwave focusing processes of 12 kW/m 2 , 16 kW/m 2 , 20 kW/m 2 and 24 kW/m 2 microwave powers, and it can obtain the result that the microwave focusing process of 24 kW/m 2 is applied to the fiber yarn bunch 20 for 10 minutes to make the oxidization degree of the oxidation fiber 21 in the oxidation fiber yarn bunch 20A reach 100%.
  • the oxidation fiber yarn bunch 20A is formed by merely one oxidation fiber, or alternatively, the oxidation fiber yarn bunch 20A is formed by binding a plurality of oxidation fibers.
  • the microwave focusing process of 20 kW/m 2 is applied to the fiber yarn bunch 20 for 15 minutes to make the oxidization degree of the oxidation fiber 21 in the oxidation fiber yarn bunch 20A reach 100%.
  • the microwave focusing process of 16 kW/m 2 is applied to the fiber yarn bunch 20 for 25 minutes to make the oxidization degree of the oxidation fiber 21 in the oxidation fiber yarn bunch 20A reach 100%.
  • the microwave focusing process of 12 kW/m 2 is applied to the fiber yarn bunch 20 for 40 minutes, the oxidization degree of the oxidation fiber 21 in the oxidation fiber yarn bunch 20A still cannot reach 100%, but can reach 89%.
  • the oxidization degree of the oxidation fiber 21 can merely reaches 70%.
  • the present disclosure can efficiently increase the oxidization degree of the oxidation fiber 21 and shorten the process time.
  • the microwave focusing process of 24 kW/m 2 is applied to the fiber yarn bunch 20 for 10 minutes, the oxidization degree of the oxidation fiber 21 in the oxidation fiber yarn bunch 20A can reach 100%, and thus the 24 kW/m 2 and 40 minutes are the best process conditions of the oxidization stage.
  • the microwave focusing processes of 24 kW/m 2 are performed on the fiber yarn bunch 20 respectively for 2 minutes, 4 minutes, 5 minutes, 10 minutes and 15 minutes for checking the cyclization degrees of the formed oxidation fibers 21.
  • the cyclization degree of the oxidation fiber 21 reaches 100 % after 5 minutes are elapsed. Thus, the required time of 5 minutes that the cyclization degree reaches 100 % is less than the required time of 10 minutes the oxidization degree reaches 100 %.
  • the cross sections of oxidation fibers 21 associated with the oxidation fiber yarn bunches 20A formed by being processed with the microwave focusing processes of 24 kW/m 2 respectively for 2 minutes, 4 minutes, 5 minutes, 10 minutes and 15 minutes 4 kW/m 2 are photographed by the scanning electron microscope to obtain the substantial cross section images. It is found that the oxidation layer 211 occupies more than 99.0 % of the oxidation fiber 21, or cross section area of the oxidation layer 211 occupies more than 99.0 % of that of the oxidation fiber 21, and no obvious shell-core structure exists.
  • Table 1 is a comparison table showing the measured tensile strengths of the fiber yarn bunches 20, the oxidation fiber yarn bunches 20A and the carbon fiber yarn bunches formed by the next carbonization, wherein two sets of the fiber yarn bunches 20, the oxidation fiber yarn bunches 20A and the carbon fiber yarn bunches are respectively processed by the conventional electro thermal tube heating process and the microwaving process of the oxidation fiber manufacturing method associated with fiber pre-oxidization device of the present disclosure.
  • Table 2 is a comparison table showing the measured tensile moduli of the fiber yarn bunches 20, the oxidation fiber yarn bunches 20A and the carbon fiber yarn bunches formed by the next carbonization, wherein two sets of the fiber yarn bunches 20, the oxidation fiber yarn bunches 20A and the carbon fiber yarn bunches are respectively processed by the conventional electro thermal tube heating process and the microwaving process of the oxidation fiber manufacturing method associated with fiber pre-oxidization device of the present disclosure.
  • the processing condition is the oven body temperature of 270 °C and the processing time of 40 minutes, and the obtained results of the physical properties are called "comparative example 1".
  • the processing condition is the oven body temperature of 220 °C, the microwave frequency of 2450 MHz, the microwave power of 24 kW/m 2 and the processing time of 10 minutes, and the obtained results of the physical properties are called "embodiment 1".
  • the fiber yarn bunches 20 are made of polyacrylonitrile.
  • Table 1 the tensile strength (MPa) the fiber yarn bunch the oxidation fiber yarn bunch the carbon fiber yarn bunch comparative example 1 865 221 2824 embodiment 1 865 164 3675
  • the embodiment 1 shows the tensile strength of the final carbon fiber yarn bunch carbonized by the oxidation fiber yarn bunch processed with the microwaving process of the present disclosure is 1.3 times of that in the comparative example 1 (i.e. 3675 divides 2824), and that is the tensile strength has the improvement of 30 %.
  • the microwaving process can oxidize polyacrylonitrile more complete, and the tensile strength of the oxidation fiber yarn bunch associated with the microwaving process is slightly less than that of the oxidation fiber yarn bunch associated with the conventional electro thermal tube heating process, which is another one evidence that the microwaving process of the present disclosure can further increase the oxidization degree of the fiber yarn bunch.
  • Table 2 the tensile modulus (GPa) the fiber yarn bunch the oxidation fiber yarn bunch the carbon fiber yarn bunch comparative example 1 8.82 6.03 194.4 embodiment 1 8.82 6.92 227.1
  • the embodiment 1 shows the tensile modulus of the final carbon fiber yarn bunch carbonized by the oxidation fiber yarn bunch processed with the microwaving process of the present disclosure is 1.17 times of that in the comparative example 1 (i.e. 227.1 divides 194.4), and that is the tensile modulus has the improvement of 17 %.
  • the microwaving process of the present disclosure can reduce the required time of the conventional heating process from 40 minutes to 10 minutes, thus the process efficiency is increased with three times, and the process time is reduced.
  • the present disclosure can enhance the 30 % tensile strength and the 17 % tensile modulus of carbon fiber yarn bunch.
  • the present disclosure can further make the cross section area of the oxidation layer 2111 of the oxidation fiber 21 in the oxidation fiber yarn bunch 20A occupy the 99.0 % cross section area of the oxidation fiber 21, such that no obvious shell-core structure exists.
  • the cross section of the oxidation fiber yarn bunch 20A is more uniform, and thus the tensile strength and the tensile modulus of the carbon fiber yarn bunch are increased.
  • the relatively positive and reliable means for enhancing the carbon fiber performance are therefore provided.
  • the 24 kW/m 2 microwave focusing process is applied to process the fiber yarn bunch for 5 minutes through 10 minutes, preferably.
  • the present disclosure is adapted to the continuous carbon fiber yarn bunch generation manner that the fiber yarn bunch 20 passes the oven body 33 without the reception and winding of the winder unit 32 and the carbonization is next performed, or alternatively, the present disclosure is adapted to the generation manner that the winded fiber yarn bunch 20 is winded out by the feeding unit 31 and received and winded by the winder unit 32.
  • the oxidation degree of the oxidation fiber 21 reaches 89 %.
  • the oxidation degree of the oxidation fiber 21 merely reaches 70 %. Therefore, compared to the conventional heating process, the present disclosure can obtain the higher oxidation degree at the lower temperature, thus preventing the thermal waste.
  • Table 3 is a comparison table showing the measured tensile strengths of the fiber yarn bunches 20, the oxidation fiber yarn bunches 20A and the carbon fiber yarn bunches formed by the next carbonization, wherein several sets of the fiber yarn bunches 20, the oxidation fiber yarn bunches 20A and the carbon fiber yarn bunches are respectively processed by the conventional electro thermal tube heating process and the microwaving processes of the oxidation fiber manufacturing method associated with fiber pre-oxidization device of the present disclosure.
  • the processing condition is the oven body temperature of 270 °C and the processing time of 40 minutes, and the obtained results of the physical properties are called "comparative example 1".
  • the processing conditions are the oven body temperature of 220 °C, the microwave frequency of 2450 MHz and the processing time of 10 minutes, and the obtained results of the physical properties associated with 24 kW/m 2 , 22 kW/m 2 , 16 kW/m 2 and 15 kW/m 2 microwave powers are called “embodiment 1", “embodiment 2", “embodiment 3", “embodiment 4" and “embodiment 5".
  • the fiber yarn bunches 20 are made of polyacrylonitrile.
  • the cross sections of the oxidation fibers 21 of the oxidation fiber yarn bunches 20A associated with all of the comparative example 1 and the embodiments 1 through 5 are photographed by the scanning electron microscope to obtain the substantial cross section images, and the calculated values that the cross section areas of the oxidation layer 211 respectively divide the cross section areas of the oxidation fiber 21, i.e. the ratios which the oxidation layers 211 occupy the oxidation fiber 21, are also listed in Table 3.
  • Table 3 number the tensile strength of the fiber yarn bunch (MPa) the microwave power (kW/m 2 ) the tensile strength of the carbon fiber yarn bunch (MPa) the tensile strength ratio R* comparative example 1 865 0 2824 1 40% embodiment 1 865 24 3675 1.30 99.0% embodiment 2 865 22 3580 1.27 91.3% embodiment 3 865 20 3486 1.23 82.7% embodiment 4 865 16 3298 1.17 61.5% embodiment 5 865 15 3204 1.13 51.2% R*: the value that the cross section area of the oxidation layer divides cross section area of the oxidation fiber
  • embodiment 5 shows the tensile strength of the final carbon fiber yarn bunch carbonized by the oxidation fiber yarn bunch processed with the microwaving process of the present disclosure is 1.13 times of that in the comparative example 1, and that is the tensile strength has the improvement of 13 %.
  • the value that the cross section area of the oxidation layer 211 divides the cross section area of the oxidation fiber 21 is 51.2 %, i.e. the oxidation layer 211 occupies the 51.2 % oxidation fiber 21.
  • Embodiment 4 shows the tensile strength of the final carbon fiber yarn bunch carbonized by the oxidation fiber yarn bunch processed with the microwaving process of the present disclosure is 1.17 times of that in the comparative example 1, and that is the tensile strength has the improvement of 17 %.
  • the value that the cross section area of the oxidation layer 211 divides the cross section area of the oxidation fiber 21 is 61.5 %, i.e. the oxidation layer 211 occupies the 61.5 % oxidation fiber 21.
  • Embodiment 3 shows the tensile strength of the final carbon fiber yarn bunch carbonized by the oxidation fiber yarn bunch processed with the microwaving process of the present disclosure is 1.23 times of that in the comparative example 1, and that is the tensile strength has the improvement of 23 %.
  • the value that the cross section area of the oxidation layer 211 divides the cross section area of the oxidation fiber 21 is 82.7 %, i.e. the oxidation layer 211 occupies the 82.7 % oxidation fiber 21.
  • Embodiment 2 shows the tensile strength of the final carbon fiber yarn bunch carbonized by the oxidation fiber yarn bunch processed with the microwaving process of the present disclosure is 1.27 times of that in the comparative example 1, and that is the tensile strength has the improvement of 27 %.
  • the value that the cross section area of the oxidation layer 211 divides the cross section area of the oxidation fiber 21 is 91.3 %, i.e. the oxidation layer 211 occupies the 91.3 % oxidation fiber 21.
  • Embodiment 1 shows the tensile strength of the final carbon fiber yarn bunch carbonized by the oxidation fiber yarn bunch processed with the microwaving process of the present disclosure is 1.3 times of that in the comparative example 1, and that is the tensile strength has the improvement of 30 %.
  • the value that the cross section area of the oxidation layer 211 divides the cross section area of the oxidation fiber 21 is 99.0 %, i.e. the oxidation layer 211 occupies the 99.0 % oxidation fiber 21.
  • the oxidation fiber 21 generated by the present disclosure comprises the oxidation layer 211 and a core portion 212, wherein the oxidation layer 211 covers the outer side of the core portion 212, and the oxidation layer 211 occupy the more than 50 % oxidation fiber 21, or the cross section area of the oxidation layer 211 occupy the more than 50 % cross section area of the oxidation fiber 21.
  • the oxidation layer 211 occupy the more than 80 % oxidation fiber 21, or the cross section area of the oxidation layer 211 occupy the more than 80 % cross section area of the oxidation fiber 21.
  • the oxidation layer 211 is an microwaved oxidation layer, and the oxidation layer 211 of the oxidation fiber 21 in the oxidation fiber yarn bunch 20A occupies the at least 50 % oxidation fiber 21.
  • the fiber yarn bunch 20 can be one of polyacrylonitrile, pitch and other organic fibers.
  • the oxidation layer 211 occupy the 99.0 % oxidation fiber 21, or the cross section area of the oxidation layer 211 occupy the 99.0 % cross section area of the oxidation fiber 21
  • the fiber pre-oxidization device disclosed by the present disclosure mainly uses the microwave processing unit to focus the microwave to apply the ultra-fast pre-oxidization process on the fiber yarn bunch, so as to process the fiber yarn bunch to form the oxidation fiber.
  • the microwave processing unit uses the microwave processing unit to focus the microwave to apply the ultra-fast pre-oxidization process on the fiber yarn bunch, so as to process the fiber yarn bunch to form the oxidation fiber.
  • the oxidation layer in the oxidation fiber occupies more than 50 % of the cross section area of the oxidation fiber to efficiently reduce shell-core structure of the oxidation fiber.
  • no obvious shell-core structure exists in the oxidation fiber. Accordingly, relatively positive and reliable means for increasing the performance of carbon fiber are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Fibers (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP18168096.8A 2018-01-29 2018-04-18 Fiber pre-oxidization device Withdrawn EP3518621A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW107103129A TWI665349B (zh) 2018-01-29 2018-01-29 Fiber pre-oxidation equipment

Publications (1)

Publication Number Publication Date
EP3518621A1 true EP3518621A1 (en) 2019-07-31

Family

ID=62025760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18168096.8A Withdrawn EP3518621A1 (en) 2018-01-29 2018-04-18 Fiber pre-oxidization device

Country Status (5)

Country Link
US (1) US20190233979A1 (zh)
EP (1) EP3518621A1 (zh)
JP (1) JP6667567B2 (zh)
CN (1) CN110093688A (zh)
TW (1) TWI665349B (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111647973A (zh) * 2020-07-07 2020-09-11 北京化工大学常州先进材料研究院 一种大丝束碳纤维的制备方法
CN113604907B (zh) * 2021-08-13 2023-05-09 合肥元贞电气有限公司 一种碳纤维高效预氧化炉

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1442519A (zh) * 2002-03-05 2003-09-17 陈新谋 聚炳烯腈纤维预氧化及碳化新工艺及装置
US20110158895A1 (en) * 2009-12-30 2011-06-30 Industrial Technology Research Institute High module carbon fiber and method for fabricating the same
US20120137446A1 (en) * 2009-09-11 2012-06-07 Toho Tenax Europe Gmbh Stabilization of polyacrylonitrile precursor yarns
CN102505188A (zh) * 2011-11-10 2012-06-20 中国科学院宁波材料技术与工程研究所 一种以聚偏氯乙烯为基体制备活性碳纤维的方法
CN105696113A (zh) * 2015-12-04 2016-06-22 江西大有科技有限公司 一种利用非平衡等离子体制造碳纤维的装置及其方法

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392143A1 (fr) * 1977-05-25 1978-12-22 British Petroleum Co Procede de fabrication de fibres de carbone ou de graphite a partir de fibres de matieres organiques naturelles par utilisation d'hyperfrequences
DE3278134D1 (en) * 1981-12-24 1988-03-31 Nippon Telegraph & Telephone Process for the production of ultrahigh-modulus polymers
FR2584258B1 (fr) * 1985-06-28 1995-04-14 Elf Aquitaine Procede et dispositif pour le traitement thermique d'un element conducteur au moins partiellement constitue d'un materiau conducteur
CN2343177Y (zh) * 1998-09-17 1999-10-13 张昌辉 旋转逆流式预氧化炉
US6733737B1 (en) * 2001-08-29 2004-05-11 Wright Materials Research Corp. Rapid oxidation/stabilization technique for carbon foams, carbon fibers and C/C composites
US7534854B1 (en) * 2005-03-29 2009-05-19 Ut-Battelle, Llc Apparatus and method for oxidation and stabilization of polymeric materials
US7824495B1 (en) * 2005-11-09 2010-11-02 Ut-Battelle, Llc System to continuously produce carbon fiber via microwave assisted plasma processing
CN2913998Y (zh) * 2006-05-23 2007-06-20 连云港鹰游纺机有限责任公司 叠层式外热预氧化炉
CN201193260Y (zh) * 2008-03-26 2009-02-11 威海拓展纤维有限公司 预氧化炉
CN101871140A (zh) * 2009-04-24 2010-10-27 李桂云 离子基碳纤维
CN201442998U (zh) * 2009-04-26 2010-04-28 潍坊华平碳纤维有限公司 一种预氧化炉用保温炉头
RU2416682C1 (ru) * 2009-07-28 2011-04-20 Марина Владимировна Соболева Способ стабилизации углеродсодержащего волокна и способ получения углеродного волокна
CN101924204B (zh) * 2010-01-21 2012-09-19 浙江大学 含氮导电膜包覆LiFePO4材料的制备方法
JP2011162898A (ja) * 2010-02-06 2011-08-25 Toho Tenax Co Ltd 炭素繊維前駆体繊維及びそれを用いた炭素繊維の製造方法
JP5787289B2 (ja) * 2011-06-20 2015-09-30 ミクロ電子株式会社 マイクロ波を応用した加熱装置
US8777601B2 (en) * 2012-07-31 2014-07-15 Uht Unitech Co., Ltd. Manufacturing device of high modulus graphite fiber
CN104047073B (zh) * 2014-06-26 2016-02-10 吉林大学 一种聚丙烯腈预氧化处理装置及方法
CN105544021A (zh) * 2016-02-18 2016-05-04 上海应用技术学院 一种抑制碳纤维结构不均匀性的方法
JP2020513486A (ja) * 2016-12-19 2020-05-14 エルジー・ケム・リミテッド マイクロウェーブを用いた炭素繊維製造装置
JP6446573B1 (ja) * 2018-01-18 2018-12-26 マイクロ波化学株式会社 マイクロ波処理装置、および炭素繊維の製造方法
TWM564599U (zh) * 2018-01-29 2018-08-01 永虹先進材料股份有限公司 Fiber pre-oxidation equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1442519A (zh) * 2002-03-05 2003-09-17 陈新谋 聚炳烯腈纤维预氧化及碳化新工艺及装置
US20120137446A1 (en) * 2009-09-11 2012-06-07 Toho Tenax Europe Gmbh Stabilization of polyacrylonitrile precursor yarns
US20110158895A1 (en) * 2009-12-30 2011-06-30 Industrial Technology Research Institute High module carbon fiber and method for fabricating the same
CN102505188A (zh) * 2011-11-10 2012-06-20 中国科学院宁波材料技术与工程研究所 一种以聚偏氯乙烯为基体制备活性碳纤维的方法
CN105696113A (zh) * 2015-12-04 2016-06-22 江西大有科技有限公司 一种利用非平衡等离子体制造碳纤维的装置及其方法

Also Published As

Publication number Publication date
TWI665349B (zh) 2019-07-11
JP6667567B2 (ja) 2020-03-18
TW201932653A (zh) 2019-08-16
CN110093688A (zh) 2019-08-06
JP2019131939A (ja) 2019-08-08
US20190233979A1 (en) 2019-08-01

Similar Documents

Publication Publication Date Title
TWM564599U (zh) Fiber pre-oxidation equipment
EP3517660A1 (en) Oxidation fiber manufacturing method
US10316433B2 (en) Carbon fiber and method for producing carbon fiber
EP2233616B1 (en) Processes for producing flameproof fiber and carbon fiber
WO2001055487A2 (en) Carbon fiber manufacturing via plasma technology
EP3518621A1 (en) Fiber pre-oxidization device
EP3556916B1 (en) Apparatus for manufacturing carbon fiber by using microwaves
EP3128051B1 (en) Carbon fiber manufacturing device and carbon fiber manufacturing method
KR101755267B1 (ko) 전자선 조사에 의해 가교화된 폴리아크릴로니트릴 섬유를 이용한 탄소 섬유 및 그 제조 방법
CN211522400U (zh) 一种微波加热碳纤维原丝退火-预氧化处理设备
EP3517659B1 (en) Oxidation fiber structure
JP2017071535A (ja) ＳｉＣ／ＳｉＣ複合材の製造方法
TWI695096B (zh) 氧化纖維製造方法
WO2022168830A1 (ja) マイクロ波加熱ユニット、及びこれを用いる炭素繊維製造方法
JP2023003361A (ja) 軽量炭素繊維、軽量炭素繊維ストランド、炭素繊維強化複合材料、及びこれらの製造方法、並びにマイクロ波加熱炉
JPH11278817A (ja) 炭素繊維強化炭素材料の薄肉円筒形状体 を複数個製造する方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190913

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: D01F 9/22 20060101ALI20210209BHEP

Ipc: H05B 6/80 20060101ALI20210209BHEP

Ipc: H05B 6/78 20060101ALI20210209BHEP

Ipc: D01F 9/32 20060101ALI20210209BHEP

Ipc: H05B 6/64 20060101AFI20210209BHEP

Ipc: D01F 9/145 20060101ALI20210209BHEP

INTG Intention to grant announced

Effective date: 20210309

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20210720