Acoustical support panel

Abstract

The acoustical support panel according to the invention comprises a membrane of resilient material, such as one obtained with shredded used tires, which is laminated on a base of compression resistant cellulose fibers. This panel has shown a noted increase of insulation from impact and aerial noises. It has an excellent dimensional stability and high resistance to compression.

We claim:  
     
         1 . An acoustical support panel comprising 
 a membrane of resilient material, and    a base of compression resistant cellulose fibers,    said membrane being laminated on said base under conditions to constitute said panel.    
     
     
         2 . Acoustical support panel according to  claim 1 , wherein said membrane is made of resilient rubber material.  
     
     
         3 . Acoustical support panel according to  claim 2 , wherein said resilient rubber material comprises recycled tire material.  
     
     
         4 . Acoustical support panel according to  claim 1 , wherein said membrane of resilient material has a thickness between about 0.1 and 0.25 inch.  
     
     
         5 . Acoustical support panel according to  claim 4 , wherein said membrane of resilient material has a thickness of about 0.14 inch.  
     
     
         6 . Acoustical support panel according to  claim 1 , wherein said membrane of resilient material has a density between 18 and 30 lbs./ft 3 .  
     
     
         7 . Acoustical support panel according to  claim 6 , wherein said membrane of resilient material has a density of about 22 lbs./ft 3 .  
     
     
         8 . Acoustical support panel according to  claim 1 , wherein said membrane of resilient material has a retention (50 Kpa load) according to ASTIM D-1055 of about 50% and a retention (100 Kpa load) according to ASTM D-1055 of about 40%.  
     
     
         9 . Acoustical support panel according to  claim 1 , wherein said base is made of wood fibers.  
     
     
         10 . Acoustical support panel according to  claim 1 , wherein said base has a thickness between about 0.3 and about 1.0 inch.  
     
     
         11 . Acoustical support panel according to  claim 10 , wherein said base has a thickness of about 0.4 inch.  
     
     
         12 . Acoustical support panel according to  claim 1 , wherein said base has a compression strength at 10% deformation of about 45 lbs./in 2 .  
     
     
         13 . Acoustical support panel according to  claim 1 , wherein said base has a linear expansion of about 0.08%. and a water absorption of about 5% P/V.  
     
     
         14 . Acoustical support panel according to  claim 1 , wherein said base has a transverse load at rupture of about 12 lbs  
     
     
         15 . Process for the manufacture of an acoustical support panel which comprises providing a membrane of resilient material, providing a base of compression resistant cellulose fibers, and laminating said membrane on said base under conditions to constitute said panel.  
     
     
         16 . An acoustical system for mounting a wood flooring over a structure consisting of joist means, board means over said joist means, a layer of concrete over said board means, an acoustical support panel according to  claim 1  over said concrete, wooden joists over said support panel, and said wood flooring mounted over said wooden joists.  
     
     
         17 . An acoustical system for mounting a wood flooring over a concrete base, which comprises an acoustical support panel according to  claim 1  mounted with the membrane of resilient material at the bottom, wooden laths spacedly distributed in parallel fashion over said support panel, longitudinal members made of same material as said acoustical support panel and aligned over said support panel between said laths, and adapted to receive said wood flooring.