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AssigneeAderans Co., Ltd.
InventorsHiroshi Kakiuchi, Setsuo Fukuhara, Michinobu Fujiwara, Hiroshi Maeda, Yutaka Shirakashi, Osamu Asakura, Yoshihiro Yoneda, Tetsuo Noda, Naoyuki Fujita
Estimating the term…
A synthetic fiber having an uneven surface structure consisting of wrinkles having ridges and recesses of the surface of the fiber and not presenting specular luster, which may be used, for example, as artificial hair for wigs, can be produced easily and stably by melt-spinning a starting synthetic resin such as nylon and passing the spun mono-filament through a cooling bath at a temperature not lower than 30.degree. C. for a period of time sufficient for developing wrinkles in its surface. Inclusion of a pigment such as carbon black in an appropriate amount in the starting material is effective in providing dense distribution of wrinkles.
A synthetic fiber formed of polyamide having an uneven surface structure consisting of ridges and recesses on the surface of said fiber, in which said uneven surface structure is comprised of a pattern formed in the entire external circumference of the fiber such that (i) each pair of adjacent recesses have their respective bottoms spaced apart from each other at an interval of about 3 to 30.mu., as measured along the external circumference of the fiber in a plane normal to a longitudinal axis of the fiber, (ii) the apex to bottom distance of any ridge as measured in a direction normal to the longitudinal axis of the fiber is about 0.2 to 2.mu., and (iii) about 0.2 to 3 ridges are present per 10.mu. along said external circumference in said plane.
A synthetic fiber formed of nylon having an uneven surface structure consisting of ridges and recesses on the surface of said fiber, in which said uneven surface structure is comprised of a pattern formed in the entire external circumference of the fiber such that (i) each pair of adjacent recesses have their respective bottoms spaced apart from each other at an interval of about 3 to 30.mu., as measured along the external circumference of the fiber in a plane normal to a longitudinal axis of the fiber, (ii) the apex to bottom distance of any ridge as measured in a direction normal to the longitudinal axis of the fiber is about 0.2 to 2.mu., and (iii) about 0.2 to 3 ridges are present per 10.mu. along said external circumference in said plant.
A synthetic fiber formed of polyamide having an uneven surface structure consisting of wrinkles having ridges and recesses on the surface of said fiber, in which:
A synthetic fiber formed of nylon having an uneven surface structure consisting of wrinkles having ridges and recesses on the surface of said fiber, in which:
Dependencies are inferred from the claim text.