Fibre for an Acoustic Insulating Material, Especially for Sound Dampers Compressed Air Devices

Abstract

An acoustic insulating material, especially for a sound damper in compressed air devices, is provided which includes fibres of a thermoplastic material comprising structures or profiled elements which are moulded or embossed in the surfaces thereof and which raise the surfaces or specific surfaces thereof. The fibres are processed to form braided or woven tubing, the ends thereof being welded such that an approximately rectangular tubular section is created, forming the acoustic insulating material when rolled into a woven tubular element.

1 . An acoustic insulating material, comprising at least one fibre of thermoplastic material, said at least one fibre including at least one of structure formed on and contouring of a surface thereof to increase at least one of surface area and specific surface area of said fibre. 
   
   
       2 . The acoustic insulating material according to  claim 1 , wherein said at least one fibre is formable into at least one of a braided fabric and knitted fabric tubing section, ends of said tubing section being sealable to form an approximately rectangular tubing portion, said tubing portion being rollable into a fabric roll. 
   
   
       3 . The acoustic insulating material according to  claim 1 , wherein said at least one fibre has a cruciform cross-sectional shape. 
   
   
       4 . The acoustic insulating material according to  claim 1 , wherein said at least one fibre has a stellate cross-sectional shape. 
   
   
       5 . The acoustic insulating material according to  claim 1 , wherein said at least one fibre has an irregular stellate cross-sectional shape. 
   
   
       6 . The acoustic insulating material according to  claim 1 , wherein said at least one of structure on and contouring of said surface of said at least one fibre extends in longitudinal direction. 
   
   
       7 . The acoustic insulating material according to  claim 6 , wherein said at least one of structure on and contouring of said surface of said at least one fibre effects alternating cross-sectional thin zones and cross-sectional thick zones of said at least one fibre. 
   
   
       8 . The acoustic insulating material according to  claim 7 , wherein said at least one of structure on and contouring of said surface of said at least one fibre is effected at least one of regularly and irregularly. 
   
   
       9 . The acoustic insulating material according to  claim 1 , wherein said surface of said at least one fibre includes further contouring extending in longitudinal direction that does not affect the cross-sectional shape of said fibre. 
   
   
       10 . The acoustic insulating material according to  claim 9 , wherein said further longitudinal contouring has at least one of a wavelike and tooth-like shape. 
   
   
       11 . The acoustic insulating material according to  claim 2 , wherein said fabric roll forms at least a part of a sound damper for a compressed air device. 
   
   
       12 . The acoustic insulating material according to  claim 1 , wherein said thermoplastic material is polypropylene. 
   
   
       13 . The acoustic insulating material according to  claim 1 , wherein said thermoplastic material is polyethylene.