Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2011-07-12
2011-07-12
Tarazano, D. Lawrence (Department: 1783)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S401000, C428S036200, C264S184000, C264S203000, C264S103000
Reexamination Certificate
active
07976943
ABSTRACT:
The present invention relates to a yarn, comprising (a) a plurality of fibers having an orientation angle of no more than 8.0 degrees and made of a para-aramid having an inherent viscosity of 5.2 to 6.2 dl/g, (b) a linear density of at least 2666 dtex (2400 denier), (c) a modulus of at least 810 grams per dtex (900 grams per denier), and (d) a tenacity of at least 18 grams per dtex (20 grams per denier). The invention further relates to methods of making such yarn.
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Leroy E. Alexander, “X-Ray Diffraction Methods in Polymer Science”, Wiley Interscience (1969) Chapter 4, p. 264.
W,B, Black et al., Man-Made Fibers, Science and Technology, vol. 2, Section titled “Fiber-Forming Aromatic Polyamides”, p. 297, Interscience Publishers (1968).
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E. I. Du Pont de Nemours and Company
Gugliotta Nicole T
Tarazano D. Lawrence
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