Paper machine clothing and method for the production thereof

Abstract

The invention relates to paper machine clothing, in particular a press felt for a paper, cardboard or tissue machine, comprising a load absorbing base structure that extends in longitudinal and cross direction of the clothing and which comprises, and in particular is formed by: a) a longitudinal reinforcement module substantially providing the dimensional stability in longitudinal direction of the clothing, and b) a transverse reinforcement module substantially providing the dimensional stability in cross direction of the clothing, whereby the transverse reinforcement module and the longitudinal reinforcement module are arranged one on top of the other and are interconnected with each other. The invention is characterized in that the transverse reinforcement module is a warp knit fabric which is composed of at least one system of weft threads arranged parallel to each other, and at least one system of stitch forming sewing threads which extends substantially perpendicular thereto into which the weft threads are integrated to form a textile fabric, wherein the weft threads extend diagonally to the longitudinal direction of the clothing and have a greater flexural strength than the sewing threads.

1 . A papermachine clothing, formed as a press felt, for one of a paper, a cardboard, and a tissue machine, said papermachine clothing comprising:
 a load absorbing base structure which extends in a longitudinal direction and a cross direction of the papermachine clothing and which includes a longitudinal reinforcement module and a transverse reinforcement module, said longitudinal reinforcement module substantially providing a dimensional stability of the papermachine clothing in said longitudinal direction, said transverse reinforcement module substantially providing a dimensional stability of the papermachine clothing in said cross direction of the papermachine clothing, said transverse reinforcement module and said longitudinal reinforcement module being arranged one on top of the other, said transverse reinforcement module being at least one warp knit fabric which includes (a) at least one system of a plurality of weft threads arranged parallel to each other in a longitudinal orientation of said plurality of weft threads, and (b) at least one system which extends substantially perpendicular thereto and which includes a plurality of sewing threads that form a plurality of stitches and into which said plurality of weft threads are integrated to form a textile fabric, said plurality of weft threads in said longitudinal orientation extending diagonally to said longitudinal direction of the papermachine clothing and having a greater flexural strength than said plurality of sewing threads.   
     
     
         2 . The papermachine clothing according to  claim 1 , wherein said plurality of weft threads in said longitudinal orientation extend transversely to said longitudinal direction of the papermachine clothing. 
     
     
         3 . The papermachine clothing according to  claim 1 , wherein said longitudinal reinforcement module includes a laid structure of longitudinal threads which includes at least one said longitudinal thread extending essentially in said longitudinal direction of the papermachine clothing and being wound continuously spirally in said cross direction of the papermachine clothing. 
     
     
         4 . The papermachine clothing according to  claim 1 , wherein said at least one warp knit fabric is formed from one single said system of said plurality of weft threads arranged parallel to each other and from one single said system including said plurality of sewing threads that form said plurality of stitches. 
     
     
         5 . The papermachine clothing according to  claim 1 , wherein said at least one warp knit fabric is produced by stitch bonding processes, wherein said plurality of weft threads are delivered during stitch formation by way of parallel weft insertion. 
     
     
         6 . The papermachine clothing according to  claim 1 , wherein said plurality of sewing threads form a plurality of rows of said plurality of stitches, said plurality of rows being arranged parallel to each other and extending perpendicular to said plurality of weft threads, said plurality of weft threads being integrated into said plurality of stitches. 
     
     
         7 . The papermachine clothing according to  claim 6 , wherein each of said plurality of sewing threads forms a respective one of said plurality of rows of stitches. 
     
     
         8 . The papermachine clothing according to  claim 6 , wherein each of said plurality of weft threads is integrated into a respective one stitch of each of said plurality of rows of stitches. 
     
     
         9 . The papermachine clothing according to  claim 6 , wherein a distance of said plurality of weft threads to each other is determined by a length of said plurality of stitches in said plurality of rows of stitches. 
     
     
         10 . The papermachine clothing according to  claim 1 , wherein said plurality of weft threads are formed by a plurality of multifilament yarns each of which is formed by a plurality of monofilaments which are twisted together. 
     
     
         11 . The papermachine clothing according to  claim 1 , wherein said warp knit fabric is produced flat. 
     
     
         12 . The papermachine clothing according to  claim 1 , wherein said at least one warp knit fabric extends on a length of the papermachine clothing. 
     
     
         13 . The papermachine clothing according to  claim 1 , wherein said transverse reinforcement module includes one single said warp knit fabric extending on a length and on a width of the papermachine clothing. 
     
     
         14 . The papermachine clothing according to  claim 1 , wherein said transverse reinforcement module includes a plurality of said warp knit fabric extending respectively on a length of the papermachine clothing and only on a part of a width of the papermachine clothing, said plurality of warp knit fabrics located adjacent to each other in said cross direction of the papermachine clothing being arranged to together make up said width of the papermachine clothing. 
     
     
         15 . The papermachine clothing according to  claim 1 , wherein said at least one warp knit fabric includes two transverse edges progressing transversely to said longitudinal direction of the papermachine clothing, said at least one warp knit fabric further including a length which is limited by said two transverse edges progressing transversely to said longitudinal direction of the paper machine clothing. 
     
     
         16 . The papermachine clothing according to  claim 15 , wherein said two transverse edges are abutted in order to make said at least one warp knit fabric extending on a length of the papermachine clothing endless. 
     
     
         17 . The papermachine clothing according to  claim 16 , further including a connecting strip, wherein said at least one warp knit fabric is made endless by way of said connecting strip which covers said two transverse edges which are abutting, said connecting strip being connected with said transverse reinforcement module in an area of said at least one warp knit fabric including said two transverse edges. 
     
     
         18 . The papermachine clothing according to  claim 17 , wherein said connecting strip is made of at least one of (a) at least one film and (b) one spun nonwoven material. 
     
     
         19 . The papermachine clothing according to  claim 17 , wherein said connecting strip is connected with said at least one warp knit fabric due to an effect of at least one of pressure and temperature. 
     
     
         20 . The papermachine clothing according to  claim 15 , further including a material strip including an edge, wherein in an area of said at least one warp knit fabric including at least one of said two transverse edges said material strip is connected with said at least one warp knit fabric such that said edge is flush with said one of said two transverse edges. 
     
     
         21 . The papermachine clothing  claim 20 , wherein said material strip is made of at least one of (a) at least one film and (b) one spun nonwoven material. 
     
     
         22 . The papermachine clothing according to  claim 20 , wherein said material strip is connected with said at least one warp knit fabric due to an effect of at least one of pressure and temperature. 
     
     
         23 . The papermachine clothing according to  claim 1 , wherein said longitudinal reinforcement module includes a laid structure of longitudinal threads which includes at least one said longitudinal thread extending essentially in said longitudinal direction of the papermachine clothing and being wound continuously spirally in said cross direction of the papermachine clothing, said longitudinal reinforcement module including a support layer arranged at said laid structure of longitudinal threads. 
     
     
         24 . The papermachine clothing according to  claim 23 , wherein said support layer is formed by at least one of one fibrous nonwoven layer and one film layer. 
     
     
         25 . The papermachine clothing according to  claim 24 , wherein said laid structure of longitudinal threads is embedded into said fibrous nonwoven layer forming said support layer. 
     
     
         26 . The papermachine clothing according to  claim 24 , wherein said fibrous nonwoven layer includes a plurality of melt adhesive fibers. 
     
     
         27 . The paper machine clothing according to  claim 24 , wherein said transverse reinforcement module is arranged on, and is bonded with, said support layer of said longitudinal reinforcement module. 
     
     
         28 . The papermachine clothing according to  claim 24 , wherein said laid structure of longitudinal threads is needled together with said support layer, said support layer being formed as said fibrous nonwoven layer. 
     
     
         29 . The papermachine clothing according to  claim 23 , wherein said support layer includes at least one support web which extends essentially in said longitudinal direction of the papermachine clothing and which is continuously spirally wound in said cross direction of said papermachine clothing. 
     
     
         30 . The papermachine clothing according to  claim 1 , wherein said transverse reinforcement module is connected with said longitudinal reinforcement module in that said transverse reinforcement module and said longitudinal reinforcement module are at least one of needled, sewn, and welded together. 
     
     
         31 . The papermachine clothing according to  claim 1 , wherein the papermachine clothing includes a paper side and a machine side, said base structure including a first side facing said paper side and a second side facing said machine side, at least one of (a) the papermachine clothing including a first fibrous nonwoven layer which is arranged on said first side, and (b) the papermachine clothing including a second fibrous nonwoven layer which is arranged on said second side. 
     
     
         32 . A method to produce a papermachine clothing, formed as a press felt for a papermachine, for one of a paper, a cardboard, and a tissue machine, said method comprising the steps of:
 providing that the papermachine clothing includes a load absorbing base structure which extends in a longitudinal direction and a cross direction of the papermachine clothing and which includes a longitudinal reinforcement module and a transverse reinforcement module, said longitudinal reinforcement module substantially providing a dimensional stability of the papermachine clothing in said longitudinal direction, said transverse reinforcement module substantially providing a dimensional stability of the papermachine clothing in said cross direction of the papermachine clothing, said transverse reinforcement module and said longitudinal reinforcement module being arranged one on top of the other, said longitudinal reinforcement module including a laid structure of longitudinal threads which includes at least one said longitudinal thread extending essentially in said longitudinal direction of the papermachine clothing and being wound continuously spirally in said cross direction of the papermachine clothing, said longitudinal reinforcement module including a support layer arranged at said laid structure of longitudinal threads, said support layer including at least one support web which extends essentially in said longitudinal direction of the papermachine clothing and which is continuously spirally wound in said cross direction of said papermachine clothing, said transverse reinforcement module being at least one warp knit fabric which includes (a) at least one system of a plurality of weft threads arranged parallel to each other in a longitudinal orientation of said plurality of weft threads, and (b) at least one system which extends substantially perpendicular thereto and which includes a plurality of sewing threads that form a plurality of stitches and into which said plurality of weft threads are integrated to form a textile fabric, said plurality of weft threads in said longitudinal orientation extending one of diagonally and transversely to said longitudinal direction of the papermachine clothing and having a greater flexural strength than said plurality of sewing threads; and   one of abutting and overlapping, during a spiral winding process, a plurality of edges of said support web which face each other.   
     
     
         33 . A method to produce a papermachine clothing formed as a press felt for a papermachine, the papermachine clothing having a length and a width, said method comprising the steps of:
 providing a longitudinal reinforcement module and a transverse reinforcement module, said longitudinal reinforcement module having a width and a length which is consistent with the width and the length of the papermachine clothing which is to be produced, said transverse reinforcement module having a width and a length which is consistent with the width and the length of the papermachine clothing which is to be produced;   forming said transverse reinforcement module such that said transverse reinforcement module includes at least one warp knit fabric which includes (a) at least one system of a plurality of weft threads arranged parallel to each other, and (b) at least one system which extends substantially perpendicular to a longitudinal direction of said plurality of weft threads and which includes a plurality of sewing threads that form a plurality of stitches into which said plurality of weft threads are integrated to form a textile fabric, said plurality of weft threads having a greater flexural strength than said plurality of sewing threads, said at least one warp knit fabric having a length which is consistent with the length of the papermachine clothing which is to be produced;   locating said longitudinal reinforcement module and said transverse reinforcement module on top of each other, said step of locating including arranging said at least one warp knit fabric and said longitudinal reinforcement module on top of each other in a way that said plurality of weft threads of said at least one warp knit fabric extend one of diagonally and transversely to a longitudinal direction of the papermachine clothing; and   connecting said transverse reinforcement module with said longitudinal reinforcement module.