Pressure equalization fabric for hydraulic hot press facilities

Abstract

The present invention relates to a pressure equalization fabric ( 6 ), particularly a pressing cushion, for use in hydraulic hot pressing facilities, comprising metal threads ( 1 ), both as warp threads and also as weft threads of the pressing cushion, and high-temperature-resistant elastomer threads ( 3 ), preferably having stabilizing core threads ( 4 ), which are situated alternating with the metal threads ( 1 ) either as warp threads or as weft threads. To ensure better diffusion of the vapor bubbles during the pressing procedure and thus achieve a transparent and closed melamine resin surface, the pressing cushion is characterized in that the thickness in the uncompressed state of the pressing cushion is determined by the elastomer threads ( 3 ) and thus the contact points pressing cushion with parts of the hot pressing facility at moderate pressure buildup are first formed by the elastomer threads ( 3 ), the elastomer threads being compressible in such a way that upon further pressure increase up to the total pressing pressure, further contact points ( 9 ) are formed by the metal threads ( 1 ).

1 . A pressure equalization fabric ( 6 ), particularly a pressing cushion, for use in hydraulic hot pressing facilities, comprising 
 metal threads ( 1 ), both as warp threads and also as weft threads of the pressing cushion, and    high-temperature-resistant elastomer threads ( 3 ), preferably having stabilizing core threads ( 4 ), which are situated alternating with the metal threads ( 1 ) either as warp threads or as weft threads,    wherein the thickness in the uncompressed state of the pressing cushion is determined by the elastomer threads ( 3 ) and thus the contact points of the pressing cushion with parts of the hot pressing facility at moderate pressure buildup are first formed by the elastomer threads ( 3 ) upon moderate pressure buildup, the elastomer threads being compressible in such a way that upon further pressure increase up to the total compression pressure, further contact points ( 9 ) are formed by the metal threads ( 1 ).    
   
   
       2 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the diameter of the elastomer threads ( 3 ) is at least twice the diameter of the metal threads ( 1 ).  
   
   
       3 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the diameter of the elastomer threads ( 3 ) is at least three times the diameter of the metal threads ( 1 ).  
   
   
       4 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the elastomer threads ( 3 ) comprise silicone rubber.  
   
   
       5 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the elastomer threads ( 3 ) comprise a fluorinated silicone rubber.  
   
   
       6 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the elastomer threads ( 3 ) comprise a fluorinated rubber.  
   
   
       7 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the elastomer threads ( 3 ) comprise a copolymer comprising a component of fluorinated silicone rubber and silicone rubber.  
   
   
       8 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the core threads ( 4 ) comprise single filaments.  
   
   
       9 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the core threads ( 4 ) are resistant to high temperatures.  
   
   
       10 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the core threads ( 4 ) comprise metal threads.  
   
   
       11 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the metal threads are stranded.  
   
   
       12 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the metal threads ( 1 ) comprise single threads.  
   
   
       13 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein the elastomer threads ( 3 ) contain thermally-conductive materials in the elastomer sheath.  
   
   
       14 . The pressure equalization fabric ( 6 ) according to  claim 1 , wherein a high-temperature-resistant, nonmetallic thread material is admixed to the metallic warp threads or weft threads for heat control.