Patent ID: 11900907
Assignee: HOBBS BONDED FIBERS NA, LLC
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC G  B  D | IPC B  D  G

Claim 19:
20. The acoustic insulation material of claim 17, wherein:
the density of the first region is within the range of, 675
    ⁢
    
      
    
    ⁢
    
      grams
      
        m
        2
      
    
    ⁢
    
      
    
    ⁢
    to
    ⁢
    
      
    
    ⁢
    1
    ⁢
    
      ,
    
    ⁢
    125
    ⁢
    
      
    
    ⁢
    
      grams
      
        m
        2
      
    
  
  ;

the density of the second region is within the range of, 225
    ⁢
    
      
    
    ⁢
    
      grams
      
        m
        2
      
    
    ⁢
    
      
    
    ⁢
    to
    ⁢
    
      
    
    ⁢
    375
    ⁢
    
      
    
    ⁢
    
      grams
      
        m
        2
      
    
  
  ;

the material is comprised of 35% to 60% by weight shoddy fibers;
the material is comprised of 20% to 40% by weight low melt binder fibers;
the material is comprised of 7% to 20% by weight resin;
the remaining balance of the material, if any, is comprised of polyester fibers;
a majority of the shoddy fibers are recycled cotton fibers;
at least one external planar surface of the material is sprayed with a fire retardant and a resin.