Full dull polyamide 6 yarn, and a process of preparing for...

Details Full dull polyamide 6 yarn, and a process of preparing for... Full dull polyamide 6 yarn, and a process of preparing for...

2006-11-06

2010-06-15

Nerangis, Vickey (Department: 1796)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C523S333000, C524S745000, C524S847000

Reexamination Certificate

active

07736563

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.

REFERENCES:
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patent: 3556720 (1971-01-01), Cox et al.
patent: 4388425 (1983-06-01), Strehler et al.
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patent: 73028013 (1973-08-01), None
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Derwent abstract for JP 73-028013, Derwent acc No. 1973-50472U, Aug. 1973.

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