Hydrolysis resistant corrugator fabric

Abstract

The present invention relates generally to papermaking, and relates more specifically to fabrics employed in making press felts on a paper machine, pulp machine fiber cement belts, and corrugated paper board, or box-board. The invention also relates to the monofilament base of fabric optionally with a needled batt which can provide one or more of the following advantages: hydrolysis resistant materials, providing light weight high strength fabrics, having a high permeability, and soft surface with a high coefficient of friction. The present invention also relates to an integrated loop seam integrated with machine direction yarns of the monofilament base which can provide one or more of the following advantages: extremely stable and flexible corrugator fabric, and the ability to provide a non-marking loop seam.

1 . A fabric comprising:
 a monofilament woven base woven in a machine direction and a cross direction substantially transverse to the machine direction, wherein the fabric comprises a loop seam integrated with machine direction yarns.   
   
   
       2 . The fabric according to  claim 1 , further comprising a needled batt in a density of about 3.3 decitex to about 100 decitex. 
   
   
       3 . The fabric according to  claim 2 , wherein the batt is constructed of at least one of nylon and PET. 
   
   
       4 . The fabric according to  claim 1 , wherein the monofilaments in the monofilament woven base have a diameter of about 0.1 mm to about 2.0 mm. 
   
   
       5 . The fabric according to  claim 4 , wherein the monofilaments in the monofilament woven base have a diameter different in a machine direction than in a cross direction. 
   
   
       6 . The fabric according to  claim 1 , wherein the monofilament woven base contains 1 to 10 layers of cross machine direction yarns. 
   
   
       7 . The fabric according to  claim 1 , having a permeability of about 20 cfm to about 500 cfm. 
   
   
       8 . The fabric according to  claim 1 , wherein the monofilament woven base is treated on at least one of a machine side or a corrugator side with a resin. 
   
   
       9 . The fabric according to  claim 1 , wherein the monofilament woven base is constructed of at least one of polyester, nylon, PPS, PET, or PEEK. 
   
   
       10 . The fabric according to  claim 1 , further comprises a corrugator fabric, press felt fabric, or pulp machine fiber cement fabric. 
   
   
       11 . A machine comprising:
 a fabric composed of a monofilament woven base with a loop seam integrated with machine direction yarns.   
   
   
       12 . The machine according to  claim 11 , wherein the fabric further comprises a needled batt in a density of about 3.3 decitex to about 100 decitex. 
   
   
       13 . The machine according to  claim 12 , wherein the batt is constructed of at least one of nylon and PET. 
   
   
       14 . The machine according to  claim 11 , wherein the monofilaments in the monofilament woven base have a diameter of about 0.1 mm to about 2.0 mm. 
   
   
       15 . The machine according to  claim 14 , wherein the monofilaments in the monofilament woven base have a diameter different in a machine direction than in a cross direction. 
   
   
       16 . The machine according to  claim 11 , wherein the monofilament woven base contains 1 to 10 layers of cross machine direction yarns. 
   
   
       17 . The machine according to  claim 11 , wherein the fabric has a permeability of about 20 cfm to about 500 cfm. 
   
   
       18 . The machine according to  claim 11 , wherein the monofilament woven base is treated on at least one of a machine side or a corrugator side with a resin. 
   
   
       19 . The machine according to  claim 1 , further comprising a corrugator machine, press felt machine, or pulp machine. 
   
   
       20 . The machine according to  claim 11 , wherein the monofilament woven base is constructed of at least one of polyester, nylon, PPS, PET, or PEEK.