Method and device for treating a fiber mass

Abstract

The invention relates to a method and a device for treating a fibre mass, such as for example a nonwoven or a woven. Such fibre masses are conveyed through a pressing mill for treatment where they are pressed in at least one pressing zone by means of a press-roll. By the pressing, a treatment fluid already present in the fibre mass is pressed out of the fibre mass. After the pressing out of the treatment fluid, a second treatment fluid is introduced into the fibre mass. In order to achieve a distribution of the second treatment fluid in the pressed fibre mass as quickly and homogenously as possible, according to the invention it is provided that the treatment fluid is introduced through the pressing surface area into the fibre mass in an expansion region, where the pressing power exerted by the press-roll is reduced in the moving direction of the fibre mass. Here, the pressing surface area is the surface through which the pressing power acts on the fibre mass.

1 . A method for treating a fiber mass, such as a filament composite, a woven or a nonwoven, wherein the fiber mass is conveyed through a pressing mill, in which the fiber mass is pressed in at least one pressing zone through the pressing surface area of at least one press-roll by means of a pressing power acting on the fiber mass and the pressed fiber mass is impregnated with a treatment fluid, the fiber mass in the pressing zone being conveyed through an expansion region where the pressing power is reduced in the passing direction (B) of the fiber mass, wherein the treatment fluid in the expansion region is conducted through the pressing surface area into the fiber mass.  
   
   
       2 . The method according to  claim 1 , wherein the fiber mass is conveyed before the expansion region through a compression region of the pressing zone, in which the pressing power is increased in the passing direction (B) of the fiber mass and an already present treatment fluid is pressed out of the fiber mass ( 21 ).  
   
   
       3 . The method according to  claim 2 , wherein the pressed out treatment fluid is let off in the compression region through the pressing surface area.  
   
   
       4 . The method according to  claim 1 , wherein the treatment fluid is pressed into the fiber mass in the compression region.  
   
   
       5 . The method according to  claim 4 , wherein the treatment fluid is conveyed through the pressing surface area into the fiber mass in the compression region.  
   
   
       6 . The method according to  claim 1 , wherein the fiber mass is passed between at least two press-rolls in the pressing zone.  
   
   
       7 . The method according to  claim 1 , wherein the treatment fluid is pressed into the fiber mass under pressure.  
   
   
       8 . The method according to  claim 1 , wherein before the pressing mill the fiber mass is manufactured with a specific weight between 0.1 and 20 kg/m2.  
   
   
       9 . The methods according to  claim 1 , wherein the fiber mass is supplied to the pressing mill in the form of a mat.  
   
   
       10 . The method according to  claim 1 , wherein the fiber mass is successively conveyed through several press-roll arrangements where in each arrangement a first treatment fluid is pressed out of the fiber mass in the compression region and the fiber mass is impregnated with the second treatment fluid in the expansion region.  
   
   
       11 . The method according to  claim 1 , wherein the fiber mass is prepared from a solution containing cellulose, water and tertiary amine oxide.  
   
   
       12 . The method according to  claim 1 , wherein the press-roll is driven with a peripheral speed of at least 0.1 m/min.  
   
   
       13 - 18 . (Canceled)  
   
   
       19 . A press-roll arrangement for treating a fiber mass moving relatively to the press-roll arrangement, comprising at least one press-roll having a pressing surface area through which in operation in a pressing zone a pressing power action on the fiber mass is generated, and having at least one impregnation means through which in operation a treatment fluid is supplied to the fiber mass, wherein in operation the pressing zone forms an expansion region, in which the pressing power is reduced in the moving direction (B) of the fiber mass, wherein the press-roll arrangement comprises openings in the expansion region, through which in operation the treatment fluid is conducted through the pressing surface area into the fiber mass.  
   
   
       20 . The press-roll arrangement according to  claim 19 , wherein the impregnation means is at least by sections arranged within the press-roll.  
   
   
       21 . The press-roll arrangement according to  claim 19 , wherein the press-roll form ribs at its surface facing the fiber mass, which at least by sections form the pressing surface area and between which in operation the treatment fluid can be introduced through the pressing surface area into the fiber mass.  
   
   
       22 . The press-roll arrangement according to  claim 21 , wherein the ribs extend essentially transversely to the moving direction of the fiber mass.  
   
   
       23 . The press-roll arrangement according to  claim 21 , wherein the ribs extend essentially in the moving direction (B) of the fiber mass.  
   
   
       24 . The press-roll arrangement according to claims  19 , wherein in the press-roll nozzles are integrated through which the treatment fluid is directed in operation to the fiber mass.  
   
   
       25 . The press-roll arrangement according to  claim 24 , wherein the nozzles comprise overlapping atomizing cones.  
   
   
       26 . The press-roll arrangement according to  claim 24 , wherein the nozzles are arranged inside the press-roll and the atomising cones are directed through the rips.  
   
   
       27 . The press-roll arrangement according to  claim 19 , wherein the ribs are formed as a weir which acts against a flow of the treatment fluid through the press-roll from the compression region to the expansion region.  
   
   
       28 . The press-roll arrangement according to  19 , wherein the impregnation means is provided with a regulation means, b which the size of the region of the pressing surface area through which the treatment fluid passes in operation, can be regulated.  
   
   
       29 . The press-roll arrangement according to  claim 28 , wherein the regulation means is designed as a cover body disposed in the press-roll with an opening associated to the region.  
   
   
       30 . The press-roll arrangement according to  claim 29 , wherein a regulation mimicry is provided by which the orientation and/or size of the opening can be regulated.  
   
   
       31 . The press-roll arrangement according to  claim 19 , wherein a suction means is provided through which the treatment fluid is sucked off from the compression region in operation.  
   
   
       32 . The press-roll arrangement according to  claim 19 , wherein the impregnation means comprises a supply line through which the treatment fluid is conducted from outside the press-roll essentially into the expansion region in operation.  
   
   
       33 . The press-roll arrangement according to  claim 32 , wherein the supply line is arranged at least in the pressing zone at least by sections between two ribs essentially extending in the moving direction (B) of the fiber mass.  
   
   
       34 . The press-roll arrangement according to  claim 19 , wherein at most about 95% of the outer peripheral surface is designed as passage surface for the treatment fluid.  
   
   
       35 . The press-roll arrangement according to  claim 34 , wherein at most about 90% of the outer peripheral surface is designed as passage surface for the treatment fluid.  
   
   
       36 . The press-roll arrangement according to  claim 35 , wherein at most about 85% of the outer peripheral surface is designed as passage surface for the treatment fluid.  
   
   
       37 . The press-roll arrangement according to wherein at least about 1% to 3% of the outer peripheral surface is designed as passage surface for the treatment fluid.  
   
   
       38 . A pressing mill for treating fiber masses with at least two press-roll arrangements consecutive in a conveying direction of the fiber mass, between which at least one treatment field is formed in which a treatment fluid acts on the fiber mass, wherein the press-roll arrangement is designed according to  claim 19 .  
   
   
       39 . The pressing mill according to  claim 38 , wherein at least one press-roll arrangement is formed as a conveying means by which the fiber mass is transported through the pressing mill.  
   
   
       40 . The pressing mill according to  claim 38 , wherein the pressing mill comprises at least one pair of press-rolls between which in operation the fiber mass is passed.  
   
   
       41 . The pressing mill according to  claim 38 , wherein the fiber mass comprises in operation a weight per surface unit of 0.1 to 20 kg/m 2 .  
   
   
       42 . The pressing mill according to  claim 41 , wherein the fiber mass comprises in operation a weight per surface unit of 0.1 to 10 kg/m 2 .  
   
   
       43 . The pressing mill according to  claim 38 , wherein the throughput of the fiber mass per treatment field is approximately 10 to 1500 kg/(m 2 h).  
   
   
       44 . The pressing mill according to  claim 43 , wherein the throughput of the fiber mass per treatment field is approximately 10 to 1200 kg/(m 2 h).  
   
   
       45 . The press-roll arrangement according to  claim 19 , wherein the press-roll is driven at a peripheral speed of less than 400 m/min.  
   
   
       46 . The press-roll arrangement according to  claim 45 , wherein the press-roll is driven at a peripheral speed of less than 60 m/min.  
   
   
       47 . The press-roll arrangement according to  claim 45 , wherein the press-roll is driven at a peripheral speed of less than 10 m/min.  
   
   
       48 . The press-roll arrangement according to  claim 19 , wherein with respect to the roll width, between 0.1 and 125 m3/(h m) of the treatment fluid is supplied.  
   
   
       49 . The press-roll arrangement according to  claim 48 , wherein with respect to the roll width between 0.1 and 50 m 3 /(h m) of the treatment fluid is supplied.  
   
   
       50 . The press-roll arrangement according to  claim 48 , wherein with respect to the roll width between 0.1 and 20 m 3 /(h m) of the treatment is supplied.