Press cover, the use thereof, and the use of a thermoplastic elastomer in the form of a copolymer for a polymer layer of a press cover

Abstract

A press cover is formed with at least one polymer layer. The at least one polymer layer includes or is formed of at least one thermoplastic elastomer in the form of a copolymer. There is also disclosed the use of a press cover of this type in a shoe press, a shoe press of this type, and a press roll, in each case having a press cover of this type. Finally, there is also disclosed the use of a thermoplastic elastomer in the form of a copolymer, for at least one polymer layer of a press cover for a shoe press for the treatment of a fibrous web.

1 - 14 . (canceled) 
     
     
         15 . A press cover for a press for the treatment of a fibrous material web, the press cover comprising:
 at least one polymer layer, said at least one polymer layer being formed of, or comprising, at least one thermoplastic elastomer being a copolymer.   
     
     
         16 . The press cover according to  claim 15 , wherein said at least one thermoplastic elastomer is a segmented block copolymer. 
     
     
         17 . The press cover according to  claim 15 , wherein said at least one thermoplastic elastomer is a thermoplastic copolyester elastomer. 
     
     
         18 . The press cover according to  claim 15 , wherein said at least one thermoplastic elastomer is a thermoplastic copolyamide elastomer. 
     
     
         19 . The press cover according to  claim 15 , wherein said at least one polymer layer comprises an embedded reinforcing structure, being at least one reinforcing thread. 
     
     
         20 . The press cover according to  claim 19 , wherein said at least one reinforcing thread consists of a polymer selected from the group consisting of polyester, polyethylene naphthalate, and polyamide. 
     
     
         21 . The press cover according to  claim 20 , wherein said at least one reinforcing thread is an aramid thread. 
     
     
         22 . The press cover according to  claim 19 , wherein said at least one reinforcing thread comprises of a polymer selected from the group consisting of polyester, polyethylene naphthalate, and polyamide. 
     
     
         23 . The press cover according to  claim 19 , wherein said at least one reinforcing thread is one or more longitudinal threads which, running in a longitudinal direction of the press cover, are arranged at a spacing distance and parallel to one another over a circumference of the press cover. 
     
     
         24 . The press cover according to  claim 23 , wherein at least one further reinforcing thread is a circumferential thread which runs within said at least one polymer layer along a helical line in the circumferential direction of the press cover. 
     
     
         25 . The press cover according to  claim 24 , wherein said reinforcing threads that are longitudinal threads and said at least one further reinforcing thread that is configured as circumferential thread form a scrim with one another, with said longitudinal threads being arranged radially within said at least one circumferential thread, as viewed in relation to the longitudinal axis of the press cover. 
     
     
         26 . The press cover according to  claim 19 , wherein said at least one polymer layer is one of a plurality of polymer layers and at least one polymer layer, in relation to the longitudinal axis of the press cover, is a radially inner or innermost polymer layer, and an additional polymer layer is a radially outermost layer in relation to the longitudinal axis of the press cover. 
     
     
         27 . The press cover according to  claim 26 , wherein said at least one polymer layer is one of exactly two polymer layers and a radially inner polymer layer is a radially innermost polymer layer of the press cover. 
     
     
         28 . A press roll for a shoe press for treating a fibrous material web the press roll comprising at least one press cover according to  claim 15 . 
     
     
         29 . A shoe press for treating a fibrous material web, the shoe press comprising a press roll and an opposing roll, which together form or delimit a press nip, said press roll including a circulating press cover according to  claim 15 . 
     
     
         30 . The shoe press according to  claim 29 , configured for treating a paper, cardboard, tissue, or pulp web, 
     
     
         31 . The press cover according to  claim 15  configured for use in a shoe press for treating a fibrous material web. 
     
     
         32 . The shoe press according to  claim 29 , configured for treating a paper, cardboard, tissue, or pulp web. 
     
     
         33 . In a press cover for a shoe press for treating a fibrous material web, the press cover having at least one polymer layer, the improvement which comprises the at least one polymer layer being a thermoplastic elastomer in the form of a copolymer. 
     
     
         34 . The improved press cover according to  claim 33 , wherein the copolymer is a segmented block copolymer, being a thermoplastic copolyester elastomer and/or a thermoplastic copolyamide elastomer.