Claims
- 1. A high tenacity reinforcing polyester fiber for incorporation with a thermosetting resin which is then cured to form a plastic composite, said polyester fiber characterized in that the fiber is treated to enhance wettability with the resin and adhesion with the cured resin, and the fiber has a thermal shrinkage of 3 percent or less, a modulus after cure of at least 70 grams per denier and a tenacity of at least 5.5 grams per denier.
- 2. The fiber of claim 1 having an elongation of from about 10 to 28 percent and wherein the modulus after cure is 70 to 90 grams per denier and the tenacity is 7 to 9 grams per denier.
- 3. The fiber of claim 1 which is polyethylene terephthalate.
- 4. A fiber reinforced plastic composite comprising a cured resin matrix reinforced with fiber, said fiber comprising a high tenacity reinforcing polyester fiber that is treated to enhance adhesion with the cured resin, has a thermal shrinkage of 3 percent or less, a modulus after cure of at least 70 grams per denier and a tenacity of at least 5.5 grams per denier, said polyester fiber being present in an amount sufficient to provide improved notched impact strength to the composite.
- 5. The composite of claim 4 wherein said cured resin matrix is formed from a thermosetting resin selected from the group consisting of polyester, epoxy, and vinyl ester.
- 6. The composite of claim 5 wherein the fiber has an elongation of from about 10 to 28 percent, a modulus after cure of 70 to 90 grams per denier and a tenacity of 7 to 9 grams per denier.
- 7. The composite of claim 6 wherein said polyester fiber is polyethylene terephthalate.
- 8. The composite of claim 4 wherein the elongation of the fiber in the cured composite is at least 2 times that of the resin matrix.
Parent Case Info
This application is a division of application Ser. No. 624,897, filed 6/27/84, now U.S. Pat. No. 4,748,197.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4101525 |
Davis et al. |
Jul 1978 |
|
4158714 |
Brichta et al. |
Jun 1979 |
|
4695509 |
Cordova et al. |
Sep 1987 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
0024423 |
Mar 1978 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
624897 |
Jun 1984 |
|