Claims
- 1. Thermoplastic molded part which is free of chemical foaming agent, the molded part having a porous center and at least one non-porous dish surface, said molded part comprising a polyolefin or a polycondensation polymer and from 1 to 60 wt. % reinforcing fibers with a length of between 0.8 and 15 mm, at least a portion of which reinforcing fibers are present partly in the center and partly in the non-porous dish surface, and wherein the molded part has a porosity of between 5 and 95 vol. %.
- 2. Thermoplastic molded part according to claim 1, wherein the molded part comprises polyolefin having a melt flow index (according to ISO 1133) of higher than 30 g/10 min.
- 3. Thermoplastic molded part according to claim 2, wherein the polyolefin has a melt flow index lower than 700 g/10 min.
- 4. Thermoplastic molded part according to claim 2, wherein the polyolefin comprises polypropylene.
- 5. Thermoplastic molded part according to claim 1, which comprises a polycondensation polymer, wherein the Mn of the polycondensation polymer is higher than 5000 g/mol.
- 6. Thermoplastic molded part according to claim 5, wherein the polycondensation polymer comprises polyamide 6, polyamide 6.6, polyamide 11, polyamide 12, polyethylene terephthalate, or polybutylene terephthalate or a copolymer thereof.
- 7. Thermoplastic molded part according to claim 1, which contains 10-60 wt. % glass fibers as said reinforcing fibers.
- 8. Thermoplastic molded part according to claim 1, which contains contains 2-7 wt. % carbon fibers as said reinforcing fibers.
- 9. Thermoplastic molded part according to claim 1, wherein the porosity is between 20 and 85%.
- 10. Thermoplastic molded part according to claim 1, wherein the polyolefin is present and comprises polypropylene.
- 11. Thermoplastic molded part according to claim 1, wherein the polycondensation polymer is present and is comprises polyamide 6, polyamide 6.6, polyamide 11, polyamide 12, polyethylene terephthalate, or polybutylene terephthalate or a copolymer thereof.
- 12. Thermoplastic molded part according to claim 1, having a specific flexural modulus of at least 10.
- 13. Thermoplastic molded part according to claim 1, having a specific strength of at least 3.5.
- 14. Thermoplastic molded part according to claim 1, which is dish-shaped, in which both surfaces are non-porous.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1004268 |
Oct 1996 |
NL |
|
CROSS REFERENCE TO RELATED APPLICATIONS
The present Application is a Divisional Application of U.S. application Ser. No. 09/288,333, filed Apr. 8, 1999, now U.S. Pat. No. 6,303,070, which is itself a Continuation of International Application PCT/NL97/00576, filed Oct. 14, 1997. Both of these applications are hereby incorporated in their entirety by reference.
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Kind |
4923650 |
Antoon, Jr. et al. |
May 1990 |
A |
5843568 |
Masui et al. |
Dec 1998 |
A |
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Foreign Referenced Citations (2)
Number |
Date |
Country |
7-16933 |
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JP |
9729896 |
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WO |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/NL97/00576 |
Oct 1997 |
US |
Child |
09/288333 |
|
US |