Dryer fabric

Abstract

The invention relates to a dryer fabric, which is woven of machine direction yarns ( 2 ) and cross machine direction yarns ( 3 ). The machine direction yarns ( 2 ) have free long float above at least seven cross machine yarns on a paper side (P) of the dryer fabric ( 1 ). Further, the fabric has double cloth structure having machine direction yarns in two successive layers ( 2 a, 2 b ).

1 - 8 . (canceled) 
     
     
         9 . A dryer fabric for a dryer section of a paper machine, the dryer fabric ( 1 ) being a woven structure and comprising:
 a paper side surface (P) that is facing towards a fiber web to be dried during use of the dryer fabric ( 1 );   a roll side surface (R) that is facing towards the paper machine during use at the dryer section;   a plurality of machine direction (MD) yarns ( 2 ), each of the plurality MD yarns ( 2 ) having a flat cross section; and   a plurality of cross machine direction (CMD) yarns ( 3 ),   wherein:
 the dryer fabric ( 1 ) has a double machine direction yarn structure comprising MD yarns ( 2 ) in two successive layers ( 2   a,    2   b ); 
 the MD yarns ( 2 ) pass above at least seven of the plurality of CMD yarns ( 3 ) on at least the paper side (P) of the dryer fabric ( 1 ), thereby forming long floats (LF, LFP) on the paper side surface (P) and providing the dryer fabric ( 1 ) with a smooth surface on the paper side surface (P) for preventing generation of markings to the fiber web; and 
   the dryer fabric has a double-cloth structure so that the fabric has two independent fabric layers one above the other, the fabric layers being self-stitched to connect the fabric layers together.   
     
     
         10 . The dryer fabric as claimed in  claim 9 , wherein a contact area of the paper side surface (P) of the dryer fabric ( 1 ) is 50% or more. 
     
     
         11 . The dryer fabric as claimed in  claim 9 , wherein:
 the CMD yarns ( 3 ) are strongly shrinking yarns, whereby heat treatment of the dryer fabric is configured to cause cross direction shrinkage of the dryer fabric so that adjacent MD yarns ( 2 ) are being moved closer to one another; and   the shrinkage of the CMD yarn ( 3 ) is over 10%; and   after weaving, the dryer fabric ( 1 ) has shrunk by means of heat treatment at least 10% in the cross machine direction.   
     
     
         12 . The dryer fabric as claimed in  claim 9 , wherein:
 the flat cross section of the MD yarns ( 2 ) is rectangular or substantially rectangular;   a width of the MD yarn ( 2 ) is 0.6 mm or more; and   a height of the MD yarn ( 2 ) is 0.4 mm or less.   
     
     
         13 . The dryer fabric as claimed in  claim 9 , wherein the MD yarns ( 2 ) pass below at least seven of the plurality of CMD yarns ( 3 ) on the roll side surface (R) of the dryer fabric ( 1 ), thereby forming long floats (LFT) on the roll side surface (R). 
     
     
         14 . The dryer fabric as claimed in  claim 9 , wherein the MD yarns ( 2 ) have long free floats (LF, LFP, LFR) passing over at least eleven of the plurality of CMD yarns ( 3 ) on at least one surface of the dryer fabric ( 1 ). 
     
     
         15 . The dryer fabric as claimed in  claim 9 , wherein the dryer fabric has at least eight shed weaving structure.