Superfine carbon fiber thread obtained by subjecting opene carbon fiber thread from carbon fiber raw thread to twisting, method for manufacturing the same, and strand or woven yar with the same

Abstract

The purpose of the instant invention is to provide a superfine carbon fiber thread with excellent bending strength and repeated bending. To achieve this purpose, (1) a desired composite thread is produced by opening open carbon fibers, slitting the opened fibers, twisting the slit fibers and forming a composite with a composite thread; and (2) a composite thread is produced by performing a lamination process with a film (film of composite materials) while performing a fiber-opening process, and then slitting, twisting and heating the tread for stress relief.

1 . A superfine open carbon fiber thread obtained by opening a carbon fiber resin tape formed from 12K or 24K raw threads, slitting the opened tape, twisting the slit tape, and forming a composite of the tape,
 wherein said forming a composite of the tape comprises an S- and Z-winding covering, and   wherein said forming a composite of the tape comprises obtaining composite thread materials from one or more types of fine threads selected from a group consisting of copper wire, aluminum wire, brass wire, iron chrome wire, Inconel (registered trademark) wire, tin wire, thermoplastic resin thread, thermosetting resin thread nylon, stainless steel wire, copper wire, and inorganic material wire.   
     
     
         2 . A superfine open carbon fiber thread obtained by opening a carbon fiber resin tape formed from 12K or 24K raw threads, laminating the opened tape, slitting the laminated tape, and twisting the superfine width laminated material obtained from said slitting,
 wherein the superfine open carbon fiber thread comprises a laminated film, and   wherein said film comprises a membrane or non-woven fabric and is a material selected from a group consisting of ePTFE, nylon 66, ABS, PET, PVA, polyester, silk, cotton, polyimide, and aramid resin.   
     
     
         3 . A strand or woven yarn of superfine open carbon fibers according to  claim 1  arranged as warp and weft threads, respectively,
 wherein the superfine open carbon fibers have a width of 1.5 to 12.5 mm after said slitting, are twisted 10 times/m to 120 times/m, and have a diameter of 0.1 to 1.0 m/mφ. 
 
     
     
         4 . A strand or woven yarn of superfine open carbon fibers according to  claim 1  arranged as warp and weft threads, respectively,
 wherein the superfine open carbon fibers have a width of 1.5 to 12.5 mm after said slitting, are twisted 10 times/m to 120 times/m, and have a diameter of 0.1 to 1.0 m/mφ, and wherein said film including a membrane or non-woven fabric has a thickness of 1 μm or less to 30 μm or less. 
 
     
     
         5 . The strand or woven yarn according to  claim 3  or  4 , wherein the strand or woven yarn are used for a fishing net through a fishing net machine. 
     
     
         6 . A method for manufacturing a superfine open carbon fiber thread, comprising steps of:
 preparing carbon fibers as raw threads (carbon fiber-preparing step);   obtaining an open fiber tape by opening the raw threads, using a fiber opening machine (fiber-opening step),   continuously split slitting the open fiber tape until a minimal width reaches about 2 mm, subsequent to laminating nylon 66 synthesized with 9% NMP onto the open fiber tape (slitting step),   continuously subjecting the open fiber tape with a superfine width obtained from the slitting to twisting to process it into a superfine thread (twisting step), and   making a composite thread by an S- and Z-winding threads of various types of fine thread materials threads to said superfine thread (composite thread-making step),   wherein said various types of fine thread materials include one or more types selected from a group consisting of copper wire, aluminum wire, brass wire, iron-chrome wire, Inconel (registered trademark) wire, tin wire, thermoplastic resin thread, thermosetting resin thread nylon, stainless steel wire, copper wire and inorganic material wire.   
     
     
         7 . A method for manufacturing a superfine open carbon fiber thread, comprising steps of:
 preparing carbon fibers as raw threads (carbon fiber-preparing step),   obtaining an open fiber tape by opening the raw threads, using a fiber opening machine (fiber-opening step),   impregnating the open fiber tape with a sizing resin from 0.5 to 5% while opening, wherein the sizing resin is selected from a group consisting of potassium persulfate and PVA (impregnating step),   laminating and adhering an ePTFE film onto said open fiber tape (adhering step),   continuously slitting the open fiber tape to 1.5 mm to 12.5 mm width, using a slitting machine (slitting step), and   subjecting the thread to twist, using a twisting machine, for finishing treatment (twisting step).   
     
     
         8 . The method for manufacturing according to  claim 6  or  7 , wherein said opening is a step of opening a 6 mm width bundle of 12K raw threads to a 24 to 25 mm width bundle, using an opening machine. 
     
     
         9 . The method for manufacturing according to  claim 7 , wherein said twisting is performed 60 times/m. 
     
     
         10 . The method for manufacturing according to  claim 7 , wherein said lamination is single-sided lamination. 
     
     
         11 . The method for manufacturing according to  claim 7 , further comprising a step of preventing return of the twist for the finished thread by shaping the thread at 90° C. to 120° C. through a heater nozzle and removing stress.