LEAD-LOADED MICROPOROUS ACOUSTIC PANEL

• US 3,602,332 A
• Filed: 01/08/1969
• Issued: 08/31/1971
• Est. Priority Date: 01/08/1969
• Status: Expired due to Term

• Current Assignee: Hollenbeck Bonderinko
• Original Assignee: Hollenbeck Bonderinko
• Inventors: HOLLENBECK BONDERINKO
• Application Number:
  US04/789,825
• Time in Patent Office: 965 Days
• US Class Current: 181/290
• CPC Class Codes: G10K 11/165 Particles in a matrix
• CPC Class Codes: Y10T 428/249977 Specified thickness of void-containing component [absolute or relative], numerical cell dimension or density
• CPC Class Codes: Y10T 428/249986 Void-containing component contains also a solid fiber or solid particle
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof

Abstract

Sound, particularly airborne sound, is attenuated using a microporous sheet of a resilient, normally solid polymeric material (e.g. polyethylene), which sheet has finely divided lead particles uniformly dispersed therein.

Claims

2. The barrier of claim 1 wherein said finely divided lead particles comprise particles of lead oxide.

3. The barrier of claim 6 wherein said polymeric material is a polyolefin.

4. A sound attenuating barrier comprising a layer of construction material, and, adjacent said layer, a microporous sheet comprising a resilient normally solid polyolefin containing about 20 to 95 percent by weight of finely divided lead particles uniformly dispersed therein, said pores being interconnecting and having an average diameter in the range of about 0.01 to 1 microns and said sheet having a void volume in the range of about 30 to 70 percent.