Automotive sound-absorbing material

• US 20090250292A1
• Filed: 04/08/2008
• Published: 10/08/2009
• Est. Priority Date: 04/08/2008
• Status: Abandoned Application

• Current Assignee: Howa Textile Industry Co., Ltd.
• Original Assignee: Howa Textile Industry Co., Ltd.
• Inventors: Hayasaka, Shinya, Fushiki, Shinobu, Mizata, Shuichi
• Application Number:
  US12/081,000
• Publication Number:
  US 20090250292A1
• Time in Patent Office: Days
• US Class Current: 181/290
• CPC Class Codes: B60R 13/0815 Acoustic or thermal insulation of passenger compartments wall or roof liners integrating the insulating function B60R13/02; insulating floor mats or carpets B60N3/04
• CPC Class Codes: B60R 13/083 for fire walls or floors

Abstract

A thin and light-weight automotive sound-absorbing material with a superior sound-absorbing property, which can be used, for example, for automotive insulator to keep the interior of an automobile quiet. This automotive sound-absorbing material has a laminate structure comprising a sound-absorbing layer, an intermediate layer, and a sound-absorbing layer. The intermediate layer comprises a film made of thermoplastic resin with a thickness of 10 to 100μ, on which small pores are uniformly opened in such a manner that the aperture ratio would be 0.05 to 5%. The sound-absorbing layers comprise an aggregate of fibers such as felt, glass wool, etc. or porous synthetic resin layer, such as urethane foam, etc.

Claims

1. An automotive sound-absorbing material having a laminated structure composed of a sound-absorbing layer, an intermediate layer, and a sound-absorbing layer, wherein the intermediate layer comprises a film with a thickness of 10 to 100μ

, on which small pores are uniformly opened in such a manner that the aperture ratio would be 0.05 to 5%.

2. The automotive sound-absorbing material according to claim 1, wherein the intermediate layer is a film made of thermoplastic resin.

3. The automotive sound-absorbing material according to claim 1, wherein the sound-absorbing layer comprises an aggregate of fibers.

4. The automotive sound-absorbing material according to claim 1, wherein the sound-absorbing layer comprises a porous synthetic resin layer.

5. The automotive sound-absorbing material according to claim 2, wherein an adhesive layer comprising low-melting resin is laminated to at least one side of the film made of thermoplastic resin, and the adhesive layer is heated and fused to the sound-absorbing layer.

6. The automotive sound-absorbing material according to claim 5, wherein the adhesive layer is a low-melting resin with a melting point of 200°

C. or lower.

7. The automotive sound-absorbing material according to claim 1, wherein the sound-absorbing layer has a thickness of 0.5 to 40 mm and a basis weight of 100 to 1500 g/m², and the intermediate layer is a film made of thermoplastic resin to which small pores with diameters of 0.5 to 5 mm are formed with a pitch of 3 to 30 mm.