Unlock instant, AI-driven research and patent intelligence for your innovation.

Core-sheath composite fiber for artificial hair and headdress product comprising same

a technology of composite fibers and synthetic hair, which is applied in the field of core-sheath conjugate fibers for artificial hair, can solve the problems of increasing the cost of human hair, increasing the demand for artificial hair that can be substituted for human hair, and difficulty in reducing the change in strength and loosening of curls with tim

Inactive Publication Date: 2020-01-23
KANEKA CORP
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent proposes using special fibers to create artificial hair that looks and feels like natural hair. These fibers have a core and a sheath, and are made up of a semi-aromatic polyamide and a linear saturated aliphatic polyamide. The technical effect of this invention is that it allows for the creation of an artificial hair product that is not only visually appealing but also has a similar feel and texture to natural hair.

Problems solved by technology

In recent years, however, the cost of human hair increases due to difficulty in obtaining human hair, and a demand for artificial hair that can be substituted for human hair increases accordingly.
However, this attempt needs to be balanced with costs and other physical properties desired for artificial hair such as touch and feel, and it is difficult to reduce the change in strength and the loosening of curls with time due to its own weight just by setting curls using a hair iron or hot water.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Core-sheath composite fiber for artificial hair and headdress product comprising same
  • Core-sheath composite fiber for artificial hair and headdress product comprising same
  • Core-sheath composite fiber for artificial hair and headdress product comprising same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0115]Polyethylene terephthalate (trade name “BK-2180” manufactured by Mitsubishi Chemical Corporation) that had been dried to a moisture content of 100 ppm or less was supplied to a twin-screw extruder, melt kneaded at 280° C. and formed into pellets. Nylon 66 (trade name “Zytel (registered trademark)-42A” manufactured by DuPont) that had been dried to a moisture content of 100 ppm or less was supplied to a twin-screw extruder, melt kneaded at 300° C. and formed into pellets. The respective pellets were dried to a moisture content of 100 ppm or less. Then, the dried pellets were supplied to a melt spinning machine, and each molten polymer was extruded through a core-sheath type conjugate fiber spinneret with a nozzle shape indicated in Table 1 below at a barrel temperature of 280° C. for polyethylene terephthalate and at a barrel temperature of 300° C. for nylon 66. The extruded polymer was cooled to a temperature of not more than the glass transition temperature, and wound up at a...

example 2

[0116]Conjugate fibers of Example 2 with a single fiber fineness indicated in Table 1 below were obtained in the same manner as in Example 1 except that the core-to-sheath area ratio was changed to core:sheath=7:3.

example 3

[0117]Conjugate fibers of Example 3 with a single fiber fineness indicated in Table 1 below were obtained in the same manner as in Example 1 except that the core-to-sheath area ratio was changed to core:sheath=2:8.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
outer circumferenceaaaaaaaaaa
mol %aaaaaaaaaa
Login to View More

Abstract

A conjugate fiber including a core part and a sheath part covering the core part such that the conjugate fiber has a core-to-sheath area ratio of core:sheath=2:8 to 7:3 and an eccentricity of 5% or more in a cross section thereof. The cross section is in a multilobed shape and has a major axis of length L and a first minor axis of length Si y satisfying a ratio of L / S1 being 1.10-3.00. The core part has a major axis of length Lc and a first minor axis of length Sc satisfying a ratio of Lc / Sc being 1.10-3.00. The major axis of the core part is in a direction that substantially coincides with a direction of the major axis of the cross section.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation of International Application No. PCT / JP2018 / 003154, filed Jan. 31, 2018, which is based upon and claims the benefits of priority to Japanese Application No. 2017-068592, filed Mar. 30, 2017. The entire contents of all of the above applications are incorporated herein by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to core-sheath conjugate fibers for artificial hair that can be used as an alternative to human hair, and hair ornament products including the same.Discussion of the Background[0003]Conventionally, human hair has been used for hair ornament products such as hairpieces, hair wigs, hair extensions, hair bands, and doll hair. In recent years, however, the cost of human hair increases due to difficulty in obtaining human hair, and a demand for artificial hair that can be substituted for human hair increases accordingly. Examples of synthetic ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): D01F8/14A41G3/00A41G5/00D01F8/12A63H3/44
CPCD10B2503/08D01F8/12A41G5/004D01F8/14A63H3/44A41G3/0083D01D5/34D01D5/253
Inventor YASUTOMO, NORIKAZUSAKAMOTO, GENTAFUJINAGA, HIROSHI
Owner KANEKA CORP