JP2011246844A - Fiber for artificial hair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide fiber for artificial hair having touch feeling closely similar to that of natural hair, enabling reduction in time required for curling and setting hair, and also sufficiently excellent in flame retarding properties.SOLUTION: The fiber for artificial hair is obtained by making synthetic resin fibrous. The synthetic resin includes 100 pts.mass of polyamide and 3-30 pts.mass of a flame retardant. The polyamide preferably comprises at least one kind of compounds selected from the group comprising nylon 6, nylon 6, 6, nylon 4, 6, nylon 1, 2, nylon 6, 10 and nylon 6, 12.

Description

  The present invention relates to fibers used for artificial hair such as wigs, hair wigs, and false hairs that can be attached to and detached from the head (hereinafter referred to as "fibers for artificial hair").

  As a material constituting the fiber for artificial hair, there is vinyl chloride (see Patent Document 1). This is because the processability and low cost of vinyl chloride in the fiber for artificial hair are excellent.

  When an operation with heating such as curling is performed on a fiber for artificial hair made of vinyl chloride, since the heat resistant temperature of vinyl chloride is 60 to 80 ° C., the fiber shrinks greatly, and the fiber is damaged. In some cases, cutting occurred.

  Polyester mainly composed of polyethylene terephthalate is used as a constituent material for artificial hair fibers, and it is described that the polyester has flame retardancy (see Patent Document 2).

JP 2004-156149 A JP 2006-70405 A

  However, although artificial hair fibers made of polyester are somewhat improved compared to the use of vinyl chloride in terms of heat resistance, the feel is too smooth and very different from human hair. There is a problem that the time required is long, and furthermore, flame retardancy is insufficient.

  The present invention is an artificial hair fiber obtained by fiberizing a synthetic resin, wherein the synthetic resin contains 100 parts by mass of polyamide and 3 to 30 parts by mass of a flame retardant.

  The polyamide is preferably at least one compound selected from the group consisting of nylon 6, nylon 6,6, nylon 4,6, nylon 1,2, nylon 6,10, and nylon 6,12.

  The flame retardant is preferably brominated polystyrene.

  The synthetic resin preferably contains 100 parts by mass of polyamide, 3 to 30 parts by mass of a flame retardant, and 0.1 to 10 parts by mass of an antimony compound.

  The antimony compound is preferably at least one compound selected from the group consisting of antimony trioxide, antimony tetroxide, antimony pentoxide, and sodium antimonate.

  The present invention is a fiber for artificial hair that has a tactile sensation close to that of human hair, shortens the time required for curling, and is excellent in flame retardancy.

Hereinafter, embodiments of the fiber for artificial hair of the present invention will be described.
The fiber for artificial hair according to one embodiment of the present invention is a fiber for artificial hair obtained by fiberizing a synthetic resin, and the synthetic resin contains 100 parts by mass of polyamide and 3 to 30 parts by mass of a flame retardant. Fiber.

  The synthetic resin used in this embodiment contains 100 parts by mass of polyamide and 3 to 30 parts by mass of a flame retardant. This synthetic resin may contain only polyamide and a flame retardant, and may further contain other materials such as other types of resins and fine particles within a range that does not impair the effects of the present invention.

  The polyamide is preferably at least one compound selected from the group consisting of nylon 6, nylon 6,6, nylon 4,6, nylon 1,2, nylon 6,10, and nylon 6,12, Particularly preferred is nylon 6 or nylon 6,6. The weight average molecular weight (Mw) of polyamide is, for example, any value within the range of 10,000 to 200,000.

  Examples of the flame retardant include bromine compounds, halogen compounds, phosphorous / halogenated foreign substances, and metal hydroxide / phosphorus-nitroso compounds. Of these, bromine compounds are preferred.

  Examples of the bromine compound include brominated polystyrene, bromine-containing phosphate ester, brominated polybenzyl acrylate, brominated epoxy oligomer, brominated phenoxy resin, brominated polycarbonate oligomer, tetrabromobisphenol A derivative, bromine-containing triazine compound containing bromine There is an isocyanuric acid compound, and brominated polystyrene is more preferable.

  Brominated polystyrene has 1 to 5 bromine atoms bonded to the benzene ring of polystyrene instead of hydrogen. Specific examples of the polybrominated styrene include single or plural kinds of polymers among monobrominated styrene, dibrominated styrene, tribrominated styrene, tetrabromide styrene, and pentabromide styrene.

  Bromine-containing phosphate esters include pentabromotoluene, hexabromobenzene, decabromodiphenyl, decabromodiphenyl ether, bis (tribromophenoxy) ethane, tetrabromophthalic anhydride, ethylenebis (tetrabromophthalimide), ethylenebis (pentabromo) Phenyl), octabromotrimethylphenylindane, tris (tribromoneopentyl) phosphate.

  Examples of tetrabromobisphenol A derivatives include tetrabromobisphenol A, tetrabromobisphenol A-bis (2,3-dibromopropyl ether), tetrabromobisphenol A-bis (allyl ether), tetrabromobisphenol A-bis (hydroxyethyl ether). ) An example of the bromine-containing triazine compound is tris (tribromophenoxy) triazine, and an example of the bromine-containing isocyanuric acid compound is tris (2,3-dibromopropyl) isocyanurate.

  If the blending ratio of the flame retardant is too small, the flame retardant effect is not exhibited, and if it is too large, it causes a decrease in tactile sensation when fiberized, so it is 3 to 30 parts by mass, particularly preferably 5.0 to 20.0 parts by mass.

  The antimony compound is preferably at least one compound selected from the group consisting of antimony trioxide, antimony tetroxide, antimony pentoxide, and sodium antimonate.

  Antimony compounds are employed for improving flame retardancy. The antimony compound exhibits an endothermic effect in the synthetic resin when ignited. This endothermic effect improves the flame retardancy of the artificial hair fiber itself.

  When the blending ratio of the antimony compound is too small, the endothermic effect is not exhibited. When the blending ratio is too large, the spinnability is lowered. Therefore, the blending ratio is preferably 0.1 to 10 parts by mass.

  As for the fineness of the fiber for artificial hair of this embodiment, 10-100 dtex is preferable, Preferably it is 30-80 dtex, More preferably, it is 35-75 dtex.

  As a manufacturing method of the fiber for artificial hair of this embodiment, after pre-kneading 100 mass parts of polyamide, 3-30 mass parts of flame retardants, and 0.1-10 mass parts of antimony compounds as needed, kneading There is a method of melt-kneading using a machine and melt-spinning a kneaded product obtained by melt-kneading by a melt spinning method.

  The Example of the fiber for artificial hair of this invention is described in detail using a table | surface, contrasting with a comparative example.

  The fiber for artificial hair of Example 1 is 100 parts by mass of nylon 6 (Ube Industries, Ltd. 1030B) as a polyamide, and 15 parts by mass of a brominated phenoxy resin flame retardant (YPB-43M, Toto Kasei Co., Ltd.) as a flame retardant. The composition is made into a fiber for artificial hair having a single fiber degree of 50 dtex.

The manufacturing method of the fiber for artificial hair of an Example and a comparative example is demonstrated.
Polyamide, polyester, flame retardant, and antimony trioxide were individually dried to a water content of 1500 ppm or less, and the dried materials were mixed at a blending ratio shown in Table 1. The mixed mixture was melt-kneaded at a temperature of 280 ° C. and then formed into pellets. A twin screw extruder was used for melt kneading and pellet molding.

  After drying the pellets again so that the water content is 1500 ppm or less, the pellets are formed into unstretched yarns by a melt spinning machine, and the unstretched yarns are stretched 4 times to give a 50 dtex man-made hair. A fiber was produced.

  The evaluation of Table 1 will be described.

<Flame retardance>
The flame retardancy was adjusted to 20 cm in length and 1.0 g in total weight for the artificial hair fibers of Examples and Comparative Examples to form a fiber bundle. One end of this fiber bundle was fixed and hung vertically. A flame having a height of 30 mm was brought into contact with each other for 3 seconds, and the fire spread time from when the flame was removed from the fiber bundle was evaluated. The fire spread time is an average value of three measurement samples.
Excellent: Fire spread time is 0 seconds Good: Fire spread time is less than 3 seconds Possible: Fire spread time is not less than 3 seconds and less than 10 seconds: Fire spread time is not less than 10 seconds

<Tactile sense>
The tactile sensation was determined by touching the artificial hair fibers of Examples / Comparative Examples to a length of 200 mm and a weight of 1.0 g, and using the hands of 10 artificial hair fiber engineers (more than 5 years of practical experience). Evaluated by criteria.
Excellent: All 10 engineers evaluated that tactile sensation was good Good: 8 or 9 engineers evaluated that tactile sensation was good Possible: 5 or more and 7 or less engineers had tactile sensation Not evaluated as good: Not more than 4 engineers evaluated that tactile sensation is good

<Curl setting>
The curling property was adjusted to a fiber bundle by adjusting the fiber for artificial hair of Examples and Comparative Examples to a length of 50 cm and a total weight of 2.0 g. After curling by winding to a diameter of 1.4 cm), it was confirmed whether or not there was curl when it was separated from the shochu and suspended with one end fixed. The definition of the curled state is when the distance between the proximal end and the distal end of the artificial hair fiber when suspended is less than 0.85 times (less than 42.5 cm) of the total length 50 cm before curling. . As a sample before evaluation, a sample stored at a temperature of 23 ° C. and a humidity of 50% for 24 hours was adopted in order to eliminate variation in evaluation. In the evaluation, several kinds of heating time in the shochu were provided and judged according to the following criteria.
Excellent: Curling was set when the heating time in the shochu was less than 5 seconds Good: Curling was not set when the heating time in the shochu was 5 seconds or more but less than 10 seconds: The heating time in the shochu was 10 seconds or more Curled

The other materials in Table 1 were as follows.
Nylon 6,6: Toray Industries, Inc., CM3001-N
Polyester: BK-2180 manufactured by Mitsubishi Chemical Corporation
Brominated polystyrene flame retardant: Albemarle Japan Ltd., HP-7010
Antimony trioxide: manufactured by Nippon Seiko Co., Ltd., PATOX-U, average particle size 0.02 μm

  As shown in Table 1, the fibers for artificial hair of Examples 1 to 4 have flame retardancy performance and tactile sensation compared to the comparative examples by appropriately adjusting the mixing ratio of polyamide and bromine-containing flame retardant. The curl set performance was excellent. In particular, the artificial hair fiber of Example 4 was superior in flame retardancy compared to other examples.

  The fiber for artificial hair according to the present invention is a fiber used for artificial hair such as wigs, hair wigs and false hairs that can be attached to and detached from the head.

Claims (5)

Synthetic fiber made from synthetic resin,
A fiber for artificial hair in which the synthetic resin contains 100 parts by mass of polyamide and 3 to 30 parts by mass of a flame retardant.   The polyamide according to claim 1 is at least one compound selected from the group consisting of nylon 6, nylon 6,6, nylon 4,6, nylon 1,2, nylon 6,10, and nylon 6,12. A certain fiber for artificial hair.   The fiber for artificial hair according to claim 1 or 2, wherein the flame retardant is brominated polystyrene.   The fiber for artificial hair according to any one of claims 1 to 3, wherein the synthetic resin contains 100 parts by mass of polyamide, 3 to 30 parts by mass of a flame retardant, and 0.1 to 10 parts by mass of an antimony compound.   The artificial hair fiber according to claim 4, wherein the antimony compound is at least one compound selected from the group consisting of antimony trioxide, antimony tetroxide, antimony pentoxide, and sodium antimonate.