US2016281284A1PendingUtilityA1

Non-woven fabric and carbon fiber non-woven fabric

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Assignee: PANASONIC IP MAN CO LTDPriority: Mar 25, 2015Filed: Jan 15, 2016Published: Sep 29, 2016
Est. expiryMar 25, 2035(~8.7 yrs left)· nominal 20-yr term from priority
Inventors:Yuki YoshiokaTakayoshi Yamaguchi
D04H 1/413D04H 1/43D01D 5/0015D10B 2101/12D10B 2321/10D04H 1/4242D04H 1/728D01D 5/0007D10B 2331/14D04H 13/00
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Claims

Abstract

A non-woven fabric includes nanofibers which contain a polymer and inorganic particles, the nanofibers being formed by an electrospinning method. The inorganic particles contain first particles and second particles, some parts of which are exposed from a surface of the polymer. A volume V 1o of a portion of the first particles exposed from the surface of the polymer and a volume V 1i of a portion buried in the polymer satisfy a relationship of V 1o <V 1i , a volume V 2o of a portion of the second particles exposed from the surface of the polymer and a volume V 2i of a portion buried in the polymer satisfy a relationship of V 2o ≧V 2i and an average number N 1 of the first particles and an average number N 2 of the second particles per unit length of the nanofibers satisfy a relationship of N 1 >N 2 .

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A non-woven fabric comprising:
 nanofibers which contain a polymer and inorganic particles, the nanofibers being formed by an electrospinning method,   wherein the inorganic particles contain first particles and second particles, some parts of which are exposed from a surface of the polymer,   a volume V 1o  of a portion of the first particles exposed from the surface of the polymer and a volume V 1i  of a portion buried in the polymer satisfy a relationship of V 1o <V 1i ,   a volume V 2o  of a portion of the second particles exposed from the surface of the polymer and a volume V 2i  of a portion buried in the polymer satisfy a relationship of V 2o ≧V 2i , and   an average number N 1  of the first particles and an average number N 2  of the second particles per unit length of the nanofibers satisfy a relationship of N 1 >N 2 .   
     
     
         2 . The non-woven fabric according to  claim 1 , wherein ratio D f /D p  of an average fiber diameter D f  of the nanofibers to an average particle diameter D p  of the inorganic particles is from 0.5 to 30. 
     
     
         3 . The non-woven fabric according to  claim 1 , wherein an average fiber diameter D f  of the nanofibers is equal to or greater than 150 nm and smaller than 1000 nm, and an average particle diameter D p  of the inorganic particles is from 20 nm to 200 nm. 
     
     
         4 . The non-woven fabric according to  claim 1 , wherein the inorganic particles further contain third particles which are completely buried in the polymer, and
 the average number N 1  of the first particles and an average number N 3  of the third particles per unit length of the nanofibers satisfy a relationship of N 1 <N 3 .   
     
     
         5 . The non-woven fabric according to  claim 1 , wherein an amount of the inorganic particles is from 5 parts by mass to 50 parts by mass with respect to 100 parts by mass of the polymer. 
     
     
         6 . A carbon fiber non-woven fabric which is obtained by firing the non-woven fabric according to  claim 1 . 
     
     
         7 . The carbon fiber non-woven fabric according to  claim 6 , wherein the polymer is at least one kind selected from a group consisting of polyacrylonitrile and polyimide, and
 the polymer is formed by carbonizing.

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