Papermaking felt base member and papermaking felt

Abstract

Provided is a papermaking felt base member comprises: an ended woven fabric comprising machine direction yarns reciprocating in a machine direction, and cross machine direction yarns; a plurality of pintle wire insertion loops formed by folding back the machine direction yarns at both ends of the woven fabric in the machine direction; and a plurality of filling yarns arranged along the cross machine direction at least one end of the woven fabric between the cross machine direction yarns disposed at the outermost end of the woven fabric and the pintle wire insertion loops, wherein, among the plurality of filling yarns, the fineness of a first filling yarn that is disposed closest to the pintle wire insertion loops is smaller than the fineness of a second filling yarn that is disposed on the cross machine direction yarn side of the first filling yarn.

What is claimed is: 
     
         1 . A papermaking felt base member comprising:
 an ended woven fabric comprising machine direction yarns reciprocating in a machine direction, and cross machine direction yarns arranged along a cross machine direction and interwoven with the machine direction yarns;   a plurality of pintle wire insertion loops formed by folding back the machine direction yarns at both ends of the woven fabric in the machine direction, through which a pintle wire is able to be inserted; and   a plurality of filling yarns arranged along the cross machine direction at at least one end of the woven fabric between the cross machine direction yarns arranged at the outermost end of the woven fabric and the pintle wire insertion loops,   wherein, among the plurality of filling yarns, the fineness of a first filling yarn that is arranged closest to the pintle wire insertion loops is smaller than the fineness of a second filling yarn that is arranged on the cross machine direction yarn side of the first filling yarn.   
     
     
         2 . The papermaking felt base member according to  claim 1 , wherein the second filling yarn is adjacent to the first filling yarn. 
     
     
         3 . The papermaking felt base member according to  claim 1 , wherein the fineness of the first filling yarn is equal to or higher than 240 dtex and equal to or less than 2,000 dtex. 
     
     
         4 . The papermaking felt base member according to  claim 1 , wherein the fineness of the second filling yarn is equal to or higher than 330 dtex and equal to or less than 2,090 dtex. 
     
     
         5 . The papermaking felt base member according to  claim 1 , wherein the fineness of the first filling yarn is smaller than the fineness of the second filling yarn by 90 dtex or more and 1,850 dtex or less. 
     
     
         6 . The papermaking felt base member according to  claim 1 , wherein the ratio of the fineness of the second filling yarn to the fineness of the first filling yarn is equal to or higher than 105% and equal to or less than 195%. 
     
     
         7 . A papermaking felt base member according to  claim 1 , wherein, at the at least one end of the woven fabric, the plurality of filling yarns consist of the first filling yarn and the second filling yarn. 
     
     
         8 . The papermaking felt base member according to  claim 1 , wherein the second filling yarn comprises a spun yarn and/or a multifilament yarn. 
     
     
         9 . The papermaking felt base member according to  claim 1 , wherein the first filling yarn comprises a spun yarn and/or a multifilament yarn. 
     
     
         10 . The papermaking felt base member according to  claim 1 , wherein the plurality of filling yarns are interwoven with the machine direction yarns so as to form a double warp backed weave pattern. 
     
     
         11 . The papermaking felt base member according to  claim 10 , wherein
 the machine direction yarns comprises upper yarns and lower yarns that make up the pintle wire insertion loops, and   the double warp backed weave pattern comprises a repeating unit in which the plurality of filling yarns each pass through one of the upper yarns of the machine direction yarns on the opposite side to the lower yarn side and pass through one of the adjacent lower yarns on the opposite side to the upper yarn, provided that the adjacent filling yarns do not pass through the opposite side to the lower yarn side of the same upper yarn.   
     
     
         12 . The papermaking felt base member according to  claim 1 , wherein the woven fabric comprises a double warp-and-weft backed weave pattern or a multiple warp-and-weft backed weave pattern. 
     
     
         13 . The papermaking felt base member according to  claim 1 , wherein the woven fabric comprises an n-ply warp backed weave pattern, and comprises a repeat that comprises a pattern in which the cross machine direction yarn passes between an a-th machine direction yarn and an a+1-th machine direction yarn from a first surface, which is one surface of the woven fabric, then passes through the first surface side of the first machine direction yarn from the first surface, and then passes between a b-th machine direction yarn and a b+1-th machine direction yarn from the first surface; or
 comprises a repeat that comprises a pattern in which the cross machine direction yarn passes between the a-th machine direction yarn and the a+1-th machine direction yarn from the first surface, then passes through the first surface side of the first machine direction yarn from the first surface, and then passes through the side of a second surface, which is the other surface of the woven fabric, of an n-th machine direction yarn from the first surface; or   comprises a repeat that comprises a pattern in which the cross machine direction yarn passes through the second surface side of the n-th machine direction yarn from the first surface, then passes through the first surface side of the first machine direction yarn from the first surface, and then passes between the b-th machine direction yarn and the b+1-th machine direction yarn from the first surface;   wherein n is an integer equal to or greater than  2 , a and b are any integers equal to or greater than  1  and equal to or smaller than n−1, and a≠b.   
     
     
         14 . A papermaking felt comprising the papermaking felt base member according to  claim 1 , and
 a short fiber layer laminated onto the papermaking felt base member.