Sound damping materials

• US 4,461,796 A
• Filed: 07/05/1983
• Issued: 07/24/1984
• Est. Priority Date: 07/06/1982
• Status: Expired due to Fees

• Current Assignee: Bridgestone Tire Company Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Tire Company Limited (Bridgestone Corporation)
• Inventors: Morimura, Yasuhiro, Fujio, Ryota, Fukahori, Yoshihide, Fukuura, Yukio
• Primary Examiner(s): Epstein, Henry F.
• Application Number:
  US06/511,062
• Time in Patent Office: 385 Days
• Field of Search: 428/116, 428/117, 428/463, 428/118
• US Class Current: 428/116
• CPC Class Codes: B29D 24/005 the structure having joined ribs, e.g. honeycomb
• CPC Class Codes: B32B 15/12 of paper or cardboard
• CPC Class Codes: B32B 2305/024 Honeycomb
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 3/12 characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
• CPC Class Codes: B32B 3/28 characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: F16F 1/36 made of rubber or other material having high internal friction, e.g. thermoplastic elastomers spring units consisting of several springs F16F3/08
• CPC Class Codes: G10K 11/172 using resonance effects
• CPC Class Codes: Y10T 428/24149 Honeycomb-like
• CPC Class Codes: Y10T 428/24157 Filled honeycomb cells [e.g., solid substance in cavities, etc.]

Abstract

A sound damping material is disclosed, which is a composite structural body comprising honeycomb or corrugated core, plain sheet and pressure sensitive adhesive layer, a height direction of the honeycomb or corrugated core being perpendicular to a surface of a vibrating body. In this sound damping material, one pressure sensitive adhesive layer is at least existent between the honeycomb or corrugated cores or between the honeycomb or corrugated core and the plain sheet.

Claims

1. A sound damping material comprising;

a composite structural body of a honeycomb or corrugated core, a plane sheet and a pressure sensitive adhesive layer, a height direction of said honeycomb or corrugated core being perpendicular to a surface of a vibrating body, and said at least one pressure sensitive adhesive layer being existent between said honeycomb or corrugated cores or between said honeycomb or corrugated core and said plane sheet and having a dynamic shearing storage modulus of 1×

10³ ˜

1×

10⁷ dyn/cm² at 25°

C. and 15 Hz.

2. A sound damping material according to claim 1, wherein said honeycomb core has a cell size of 1˜

100 mm.

3. A sound damping material according to claim 1, wherein said honeycomb core has a height of not less than 1 mm.

4. A sound damping material according to claim 1, wherein said corrugated core has a height of 1˜

100 mm.

5. A sound damping material according to claim 1, wherein the number of ridges in said corrugated core is 30˜

500/m.

6. A sound damping material according to claim 1, wherein a weight ratio of said plain sheet to said honeycomb or corrugated core is 1/30˜

100.