Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2006-12-12
2006-12-12
Edwards, N. (Department: 1774)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S372000, C428S395000
Reexamination Certificate
active
07147914
ABSTRACT:
The present invention relates to a full dull polyamide 6 yarn and a process for preparing the same. The yarn of this invention contains 1.5 to 2.5% by weight of titanium dioxide relative to the weight of the yarn, has 35 to 95 titanium dioxide particles having a major axial length of greater than 5 μm being contained in 50 mg of the yarn, and contains 0.1 to 0.5% by weight of phosphate salt (wetting agent) relative to the weight of titanium dioxide. In the process of this invention, 0.1 to 0.5% by weight of phosphate salt relative to the weight of titanium dioxide is added as a wetting agent, carprolactam is applied along with water upon concentration correction, and naphthalene sulfonate based salt is applied along with titanium dioxide slurry during the process of polyamide 6 polymerization. The present invention improves the full dull effect and drape property of the yarn since it contains a great quantity of titanium dioxide having a proper diameter in the yarn without degrading the yarn physical properties and operationability.
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Kim Jae-Young
Park Young-Tae
Edwards N.
Kolon Industries, Inc
LandOfFree
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