Foulard for applying a binder to a gauze

Abstract

In a foulard for applying a binder to a gauze, fleece or preliminary fleece, having at least one first roll, which can be rotated about a first roll axis and has an engraved roll sleeve, at least one second roll, which can be rotated about a second roll axis and has a roll sleeve, and wherein the gauze, the fleece or the preliminary fleece runs between the first and second rolls, the roll sleeve of the second roll has a preferably groove-shaped engraving.

1 . A foulard for applying a binder to a gauze, nonwoven or preliminary nonwoven, comprising
 at least a first roll rotatable around a first roll axis, said roll having a roll sleeve provided with an engraving,   at least a second roll rotatable around a second roll axis, said roll having a roll sleeve, and wherein   the gauze, nonwoven or preliminary nonwoven runs between the first and the second roll,   
       wherein 
       the roll sleeve of the second roll comprises at least one engraving. 
     
     
         2 . The foulard of  claim 1 , wherein the engraving in the roll sleeve of the second roll is at least a groove-shaped, preferably spiral-shaped engraving. 
     
     
         3 . The foulard of  claim 1 , wherein the dimensions of the at least one, preferably groove-shaped engraving in the roll sleeve of the second sleeve are such that the volume of the preferably groove-shaped engraving is larger than the overall volume of the gauze, nonwoven or preliminary nonwoven, consisting of fibers, which in operation passes between the first and second roll per rotation of the second roll. 
     
     
         4 . The foulard of  claim 1 , wherein the dimensions of the at least one preferably groove-shaped engraving are such that the open area of the surface of the roll sleeve of the second roll preferably is between 60 and 98%, in particular between 80 and 85%. 
     
     
         5 . The foulard of  claim 2 , wherein the width of the groove-shaped engraving in the surface of the roll sleeve of the second roll is between 0.1 and 2 mm, preferably between 0.5 and 1.5 mm, and in particular 1 mm. 
     
     
         6 . The foulard of  claim 2 , wherein the width of the groove-shaped engraving in the roll sleeve of the second roll tapers in the radial direction. 
     
     
         7 . The foulard of  claim 2 , wherein the cross section of the groove-shaped engraving in the roll sleeve of the second roll is conical, frustoconical, notch-shaped or semicircular. 
     
     
         8 . The foulard of  claim 1 , wherein the roll sleeve of the second roll is made of synthetic material, preferably of rubber. 
     
     
         9 . The foulard of  claim 1 , wherein the roll sleeve of the second roll is made of metal. 
     
     
         10 . The foulard of  claim 1 , wherein the engraving in the first roll is at least a groove-shaped, preferably a spiral-shaped engraving or is formed by a plurality of preferably frustoconical or pyramidal recesses formed in the roll sleeve of the first sleeve. 
     
     
         11 . The foulard of  claim 1 , wherein the first roll is arranged such that the roll sleeve of the first roll plunges at least partly into a trough filled with a liquid binder, so that the liquid binder can be applied to the nonwoven or the gauze by means of the first roll. 
     
     
         12 . The foulard of  claim 1 , wherein a binder dissolved in foam can be applied to the gauze. 
     
     
         13 . A method for applying a binder for a gauze, nonwoven or preliminary nonwoven, by
 feeding a gauze, nonwoven or preliminary nonwoven to a foulard having a first and a second roll, the roll sleeves of the first and the second roll comprising at least one engraving,   applying the binder to the gauze, nonwoven or preliminary nonwoven,   passing the gauze, nonwoven or preliminary nonwoven through the first and the second roll, applying pressure on the gauze, nonwoven or preliminary nonwoven via the roll sleeves of the rolls.   
     
     
         14 . The method of  claim 13 , characterized in that a liquid binder is applied to the gauze, nonwoven or preliminary nonwoven. 
     
     
         15 . The method of  claim 13 , wherein a binder dissolved in foam is applied. 
     
     
         16 . The method of  claim 14 , wherein a binder dissolved in foam is applied. 
     
     
         17 . The foulard of  claim 2 , wherein the dimensions of the at least one, preferably groove-shaped engraving in the roll sleeve of the second sleeve are such that the volume of the preferably groove-shaped engraving is larger than the overall volume of the gauze, nonwoven or preliminary nonwoven, consisting of fibers, which in operation passes between the first and second roll per rotation of the second roll.