Oxidation fiber manufacturing method

Abstract

The present disclosure mainly uses a transmitting unit to drive the fiber yarn bunch to pass an operation region of the microwave processing unit, and the microwave is focused to perform an ultra-fast pre-oxidization process on the passed fiber yarn bunch, thus processing the fiber yarn bunch to form an oxidation fiber yarn bunch. Not only an oxidization time of an oxidation fiber can be reduced, but also the cross section area of the oxidation layer of the oxidation fiber in the oxidation fiber yarn bunch generated by the microwave focusing oxidization process occupies more than 50% of the cross section area of the oxidation fiber in the oxidation fiber yarn bunch. Thus, the shell-core structure of the oxidation fiber can be reduced efficiently. Even, the oxidation fiber has no obvious shell-core structure. Accordingly, relatively positive and reliable means for increasing the performance of carbon fiber are provided.

What is claimed is: 
     
         1 . An oxidation fiber manufacturing method, 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 oxidation fiber manufacturing method comprises following steps:
 a yarn bunch providing step: preparing the fiber yarn bunch; and   a microwave processing step: exposing the fiber yarn bunch in a microwaving condition to form the oxidation fiber yarn bunch.   
     
     
         2 . The oxidation fiber manufacturing method according to  claim 1 , wherein 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.; a processing time being 1 minute through 40 minutes; and a gas atmosphere being at least one of oxygen, air and ozone. 
     
     
         3 . The oxidation fiber manufacturing method according to  claim 2 , wherein the microwave power is 10 kW/m 2  through 24 kW/m 2  . 
     
     
         4 . The oxidation fiber manufacturing method according to  claim 2 , wherein the microwave frequency is 2000 MHz through 3000 MHz, the operation temperature being 150° C. through 350° C., and the processing time is 5 minutes through 20 minutes. 
     
     
         5 . The oxidation fiber manufacturing method according to  claim 1 , wherein the fiber yarn bunch is one of a polyacrylonitrile (PAN) fiber and a pitch fiber. 
     
     
         6 . An oxidation fiber manufacturing method, 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 oxidation fiber manufacturing method comprises following steps:
 a. providing a transmitting unit and a microwave processing unit;   b. providing the fiber yarn bunch, disposing the fiber yarn bunch in the transmitting unit, and making the transmitting unit drive the fiber yarn bunch to pass the microwave processing unit;   c. activating the microwave processing unit, and generating a microwaving condition by microwave processing unit; and   d. activating the transmitting unit, and driving the fiber yarn bunch to be processed for a processing time under the microwaving condition by the transmitting unit, so as to make the fiber yarn bunch form the oxidation fiber yarn bunch.   
     
     
         7 . The oxidation fiber manufacturing method according to  claim 6 , wherein 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 a gas atmosphere being at least one of oxygen, air and ozone 
     
     
         8 . The oxidation fiber manufacturing method according to  claim 7 , wherein the processing time is 1 minute through 40 minutes. 
     
     
         9 . The oxidation fiber manufacturing method according to  claim 7 , wherein the microwave power is 10 kW/m 2  through 24 kW/m 2  . 
     
     
         10 . The oxidation fiber manufacturing method according to  claim 7 , the microwave frequency is 2000 MHz through 3000 MHz, and the operation temperature being 150° C. through 350° C. 
     
     
         11 . The oxidation fiber manufacturing method according to  claim 6 , the fiber yarn bunch is one of a polyacrylonitrile (PAN) fiber and a pitch fiber. 
     
     
         12 . The oxidation fiber manufacturing method according to  claim 6 , wherein the transmitting unit is installed with a feeding unit for providing the fiber yarn bunch, a winder unit for continuously pulling and transmitting the fiber yarn bunch, and an oven body which the fiber yam bunch passes; the microwave processing unit is installed with a magnetron at the oven body for generating the microwave frequency and the microwave power, and is further installed with an gas supplying unit for injecting a gas atmosphere into the oven body. 
     
     
         13 . The oxidation fiber manufacturing method according to  claim 12 , wherein the winder unit, the magnetron and the gas supplying unit are electrically connected to a control unit. 
     
     
         14 . The oxidation fiber manufacturing method according to  claim 12 , wherein interior of the oven body is installed with a thermos unit. 
     
     
         15 . The oxidation fiber manufacturing method according to  claim 14 , wherein the thermos unit is at least one of a metal oxide, a carbide and a high microwave sensitive material. 
     
     
         16 . The oxidation fiber manufacturing method according to  claim 12 , wherein the fiber yarn bunch disposed is disposed in the oven body by a repeating and winding manner, and continuously irradiated by the microwave processing unit.