Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1993-05-24
1995-04-04
Ryan, Patrick J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428395, 57902, D02G 300
Patent
active
054036593
ABSTRACT:
Polyethylene terephthalate yarn is prepared by spinning under high stress conditions in the transition region between oriented-amorphous and oriented-crystalline undrawn yarns by selection of process parameters to form an undrawn yarn that is a crystalline, partially oriented yarn with a crystallinity of 3 to 15 percent and a melting point elevation of 2.degree. to 10.degree. C. The spun yarn is then hot drawn to a total draw ratio between 1.5/1 and 2.5/1 with the resulting properties: (A) a terminal modulus of at least 20 g/d, (B) a dimensional stability defined by E.sub.4.5 +FS<13.5 percent, (C) a tenacity of at least 7 grams per denier, (D) a melting point elevation of 9.degree. to 14.degree. C., and (E) an amorphous orientation function of less than 0.75. The resulting treated tire cord provides high tenacity in combination with improved dimensional stability.
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Bheda Jayendra H.
Nelson Charles J.
Rim Peter B.
Turner James M.
Allied-Signal Inc.
Edwards N.
Ryan Patrick J.
Thrower William H.
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