Claims
- 1. Stretched fibres and films and bioriented articles comprising a polyester resin mixed with a dianhydride of a tetracarboxylic acid in an amount from 0.05 to 2% by weight of the resin and containing dispersed in the polymer matrix a polymeric liquid crystal in a quantity of 5% by weight of the resin or less.
- 2. Fibres, films and bioriented articles according to claim 1, wherein the dianhydride of a tetracarboxylic acid is pyromellitic dianhydride.
- 3. Fibres, films and bioriented articles of claim 1 wherein said liquid crystal is in a quantity of between 0.05 to 2% by weight of said resin.
- 4. Fibres and films obtained from a polyester resin mixed with a dianhydride of a tetracarboxylic acid, having an elastic module higher of about 4 GPa, and containing 5% or less by weight of the resin of a polymeric liquid crystal dispersed in the polyester matrix.
- 5. Fibres and films according to claim 4 where the liquid crystal is a copolyester containing 73 mols % of 4-hydroxy benzoic acid and 27% mols of 2-hydroxy-6-napftoic acid.
Priority Claims (2)
Number |
Date |
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MI93A0916 |
May 1993 |
ITX |
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MI93A1317 |
Jun 1993 |
ITX |
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Parent Case Info
This application is a divisional of U.S. application Ser. No. 08/532,628, filed on Oct. 4, 1995, now U.S. Pat. No. 5,670,584, which is a U.S. national stage application of PCT/EP94/01370 filed on Apr. 29, 1994.
US Referenced Citations (11)
Foreign Referenced Citations (7)
Number |
Date |
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0 041 327 |
Dec 1981 |
EPX |
0 314 785 |
May 1989 |
EPX |
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May 1989 |
EPX |
0323127 |
Jul 1989 |
EPX |
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Apr 1991 |
EPX |
9324574 |
Dec 1993 |
WOX |
9 324 574 |
Dec 1993 |
WOX |
Non-Patent Literature Citations (2)
Entry |
Chemical Abstracts, vol. 97, No. 24, Dec. 13, 1982, abstract No. 199462h, Asahi Chemical Ind. Co., Ltd., "Polyester blend fibers," p. 69, col. 2 (JP A 82 101 020). |
A.M. Sukhadia et al., "Mixing History On the Morphology and Properties of Thermoplastic/LCP Blends," Intern. Polymer Processing VII 3, 218-228 (Munich 1992). |
Divisions (1)
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532628 |
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