(Dope-dyed) polyester core-sheath monofilament having...

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber

Reexamination Certificate

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Details

C428S374000, C428S375000, C428S378000, C428S395000, C264S103000, C264S172150, C264S172170, C264S173120

Reexamination Certificate

active

07846544

ABSTRACT:
[PROBLEMS] To provide a polyester monofilament which shows a high dimensional stability and excellent effects of preventing peel-off in filaments, preventing pirn barre and preventing halation and has a high fineness, a high strength and a high modulus. [MEANS FOR SOLVING PROBLEMS] A core-shell type composite polyester monofilament comprising polyethylene terephthalate at a ratio of 80% by mol or higher, which satisfies the following requirements A to F: A) the intrinsic viscosity of the core component being 0.70 or above and the intrinsic viscosity of the shell component being from 0.55 to 0.60; B) the core component amounting to 50 to 70%; C) at least the shell component containing from 0.2 to 0.4% by weight of metal microparticles; D) the fineness of the monofilament being from 5 to 15 dtex, its modulus at elongation of 5% being from 3 to 4.5 cN/dtex and its elongation at break being from 20 to 40%; E) the free shrinkage of the innermost part under specific conditions being 0.3% or less; and F) the node density is one per 100,000 m or less.

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