Claims
- 1. Insulation which comprises non-flammable linear non-graphitic carbonaceous polymeric fibers having improved elongability and processability, said fibers comprising a non-graphitic heat treated irreversibly set linear stabilized polyacrylonitrile based fibers having an LOI greater than 40, an elongability of about 2.5 to 9% and a pseudoelongability of about zero.
- 2. The insulation of claim 1 wherein said stabilized polyacrylonitrile based fibers are selected from the group consisting of acrylonitrile homopolyers, acrylonitrile copolymers and acrylonitrile terpolymers.
- 3. The insulation of claim 1, wherein said fibers have a carbon content less than 85 percent, a nitrogen content of more than 18%, and wherein said fibers are electrically nonconductive, do not possess any electrostatic dissipating characteristics, and have an electrical resistance of greater than 4.times.10.sup.3 ohms/cm, when measured on a 6K tow of fiber having a single fiber diameter of 4 to 20 microns.
- 4. The insulation of claim 1 wherein said fibers have a strand tenacity of about 2 to 9 g/d.
RELATED APPLICATIONS
This is a divisional application of Ser. No. 07/876,275, filed Apr. 30, 1992, now U.S. Pat. No. 5,328,764 which is a continuation-in-part of application Ser. No. 430,762 filed Nov. 1, 1989, now abandoned, entitled "Linear Carbonaceous Fiber with Improved Elongability" of Mc Cullough et al.
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Divisions (1)
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Number |
Date |
Country |
Parent |
876275 |
Apr 1992 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
430762 |
Nov 1989 |
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