Claims
- 1. A sound absorbing component comprising a fiber-reinforced thermoplastic resin expanded body having a percentage of voids being 70 to 95 volume percent, and a thickness of 2 to 30 mm, and a resin molded body, an air layer being provided between said fiber-reinforced thermoplastic resin expanded body and said resin molded body and having a thickness being 10 to 50 mm.
- 2. The sound absorbing component according to claim 1, wherein said resin molded body is a thermoplastic resin molded body having substantially no void and said fiber-reinforced thermoplastic resin expanded body is an expanded body resulting from expansion molding of a fiber-reinforced thermoplastic resin sheet obtained by a papermaking method.
- 3. The sound absorbing component according to claim 1, further comprising a film layer 20 to 100 .mu.m thick, said film layer being placed on at least a part of a surface of said fiber-reinforced thermoplastic resin expanded body on the opposite side to said resin molded body.
- 4. A sound absorbing component comprising a fiber-reinforced thermoplastic resin expanded body having a percentage of voids being 70 to 95 volume percent and a thickness of 5 to 30 mm, and a thermoplastic resin foamed body having a foaming ratio of 10 to 50 times and a thickness of 10 to 50 mm, said thermoplastic resin foamed body being placed on a part of said fiber-reinforced thermoplastic resin expanded body, an air layer being provided between said fiber-reinforced thermoplastic resin expanded body and said thermoplastic resin foam body.
- 5. The sound absorbing component according to claim 4, wherein said thermoplastic resin foamed body is a foamed body having isolated cells resulting from foaming of a thermoplastic resin containing a foaming agent and said fiber-reinforced thermoplastic resin expanded body is an expanded body resulting from expansion molding of a fiber-reinforced thermoplastic resin obtained by a papermaking method.
- 6. The sound absorbing component according to claim 4, further comprising a film layer 20 to 100 .mu.m thick, said film layer being placed on at least a part of a surface of said fiber-reinforced thermoplastic resin expanded body.
- 7. The sound absorbing component according to claim 1 or claim 4, wherein said thermoplastic resin is a polyolefin and said reinforcing fibers are glass fibers.
- 8. The sound absorbing component according to claim 1 or claim 4, wherein of said sound absorbing component further comprising a supporting portion comprised of a second fiber-reinforced thermoplastic resin expanded body having a percentage of void being less than 50 vol %.
- 9. The sound absorbing component according to claim 8, wherein the fiber-reinforced thermoplastic resin expanded body having said supporting portion is produced by a process comprising:
- heating a fiber-reinforced thermoplastic resin sheet obtained by a papermaking method to a temperature not lower than a melting point of said thermoplastic resin but lower than a decomposition point thereof, and thereby expanding said sheet by the spring back force of said reinforcing fibers so as to achieve the percentage of voids of not less than 85 volume percent;
- placing the fiber-reinforced thermoplastic resin sheet expanded, to between a pair of female and male molds in at least one cavity surface of which a recessed portion is formed, and maintaining a heating state; and
- closing said molds to form a fiber-reinforced thermoplastic resin expanded body having a portion with a percertage of voids of not less than 85 volume percent and a portion with a percentage of voids of less than 50 volume percent at a same time.
Priority Claims (3)
Number |
Date |
Country |
Kind |
7-052444 |
Mar 1995 |
JPX |
|
7-052445 |
Mar 1995 |
JPX |
|
7-156077 |
Jun 1995 |
JPX |
|
Parent Case Info
This application is the national phase of international application PCT/JP96/00618, filed Mar. 13, 1996 which designated the U.S.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP96/00618 |
3/13/1996 |
|
|
11/12/1996 |
11/12/1996 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO96/28297 |
9/19/1996 |
|
|
US Referenced Citations (7)
Foreign Referenced Citations (5)
Number |
Date |
Country |
56-151131 |
Nov 1981 |
JPX |
62-70922 |
May 1987 |
JPX |
6-156261 |
Jun 1994 |
JPX |
6-332466 |
Dec 1994 |
JPX |
244150 |
Sep 1996 |
JPX |