WO2015068771A1

WO2015068771A1 - Filament for artificial hair and artificial hair product

Info

Publication number: WO2015068771A1
Application number: PCT/JP2014/079476
Authority: WO
Inventors: 土岐美鈴; 佐藤友和
Original assignee: 東レ・モノフィラメント株式会社
Priority date: 2013-11-11
Filing date: 2014-11-06
Publication date: 2015-05-14
Also published as: JPWO2015068771A1; PH12016500849B1; PH12016500849A1; EP3069625B1; CN105934172A; EP3069625A1; EP3069625A4; JP6970399B2; KR20160085792A; US20160302504A1

Abstract

The present invention addresses the issue of providing a filament for artificial hair, that has an excellent feeling of volume and glossiness and has little thread splitting or breakage. This thermoplastic resin filament has a cross-sectional shape in a direction orthogonal to the fiber shaft that is a multi-leaf shape having at least three delamination sections. The width (W2) of the delamination sections is 10%-60% of the width (W1) of the filament and the depth (H2) of the delamination sections is 5%-30% of the height (H1) of the filament.

Description

Artificial hair filament and artificial hair product

This invention relates to the fiber for artificial hair used for a wig, a hair wig, or an extension.

Conventionally, modacrylic fibers, vinyl chloride fibers, vinylidene chloride fibers, polyester fibers, nylon fibers, and the like have been used as artificial hair fibers. In producing artificial hair products such as wigs, hair wigs, and extensions using these fibers, development of fibers suitable for these products has been repeated, and research and improvement have also been made on the cross-sectional shape of the fibers. Has been.

For example, a fiber for artificial hair having a cross-sectional shape such as a saddle type or a spectacle type having a neck at the center has been proposed (for example, see Patent Document 1).

Further, Y-shaped cross-section fibers (for example, see Patent Document 2), round Y-shaped cross-section fibers (for example, see Patent Document 3), and the like have been proposed.

JP 2007-146306 A International Publication No. 2008/029727 Japanese Patent No. 3365141

However, a cross-sectional fiber having a neck at the center as proposed in Patent Document 1 is less likely to have a volume feeling, and the fiber always bends in the minor axis direction. For this reason, the direction of the fibers is aligned on the curved surface, the glossiness tends to be unnatural, and there is a problem that it is difficult to express a three-dimensional effect when curled, which is proposed in

Patent Documents

2 and 3. Although the volume feeling is improved with such a cross-sectional shape of the fiber, the external force is likely to cause yarn breakage and breakage, which is not satisfactory in terms of durability.

The object of the present invention is to solve the above-mentioned problems in the prior art.

Therefore, an object of the present invention is to provide a filament for artificial hair that is excellent in volume and gloss and is less likely to break or break.

In order to achieve the above object, according to the present invention, a filament of a thermoplastic resin, the cross-sectional shape perpendicular to the fiber axis is a multi-leaf shape having three or more leaf cracks, and the width of the leaf cracks A filament for artificial hair is provided wherein is 10 to 60% of the width of the filament and the depth of the leaf crack is 5 to 30% of the height of the filament.

In the filament for artificial hair of the present invention,
The number of leaf portions of the multileaf shape is 3 to 8,
The single yarn fineness is 20 to 150 dtex, and the thermoplastic resin is a polyester resin, a polyamide resin, an acrylic resin, a polyvinyl chloride resin, a polyacrylonitrile resin, a polyphenylene sulfide resin, and a cellulose resin. It is preferable that at least one selected from the group consisting of the above group is a preferable condition. When these conditions are satisfied, further excellent performance is exhibited.

The artificial hair product of the present invention is characterized in that the artificial hair filament is used in at least a part of a hair material.

According to the present invention, as described below, it is possible to obtain a filament for artificial hair that is excellent in volume feeling and glossiness and is less likely to cause thread breakage and thread breakage.

(A) to (c) are cross-sectional views in the direction perpendicular to the fiber axis of the filament for artificial hair according to one example of the present invention. (D) to (f) are cross-sectional views in the direction perpendicular to the fiber axis of a filament for artificial hair according to another example of the present invention. (G) to (i) are cross-sectional views in the direction perpendicular to the fiber axis of the artificial hair filament of the comparative example. It is a schematic diagram for demonstrating the container used for a porosity measurement, and a measurement. Fig.5 (a) is a schematic diagram of the sample holder for glossiness measurement which fixed 11 single yarns of the sample. FIG. 5B is a side view schematically showing the position of the sample, the light source, and the light receiver when measuring the glossiness.

Hereinafter, the filament for artificial hair of the present invention will be described with reference to the drawings. FIGS. 1 (a) to 1 (c) and FIGS. 2 (d) to (e) are all cross-sectional views in the direction perpendicular to the fiber axis of the filament for artificial hair according to the present invention. In each figure, 1 is a filament for artificial hair, 2 is a leaf crack, and 3 is a leaf. In addition, although the leaf crack part shows the groove | channel which the recessed part in a cross section forms along the fiber axis direction of a filament, in this specification, the recessed part in a cross section shall also be described as a leaf crack part. The leaf portion refers to a portion sandwiched between adjacent leaf crack portions, and the concept applied to both the filament and the cross section is the same as in the case of the leaf crack portion.

The filament for artificial hair of the present invention has a multi-leaf shape in which the cross section perpendicular to the fiber axis has three or more leaf cracks. In the present invention, it is important that the leaf crack portion has such a specific shape in the same cross section. In addition, in this specification, unless there is particular notice about a cutting direction, a cross section shall show a cross section perpendicular to a fiber axis.

The multi-leaf shape in the present invention is a shape having a plurality of leaf crack portions and leaf portions divided thereby, for example, (a) to (c) in FIG. 1 and (a) in FIG. 2, (b) in FIG. 2 is called 4 leaves, (c) in FIG. 2 is called 5 leaves, and so on.

In the filament for artificial hair of the present invention, the width (W2) of the leaf crack is 10 to 60% of the width (W1) of the filament. The ratio of the width (W2) of the leaf crack portion to the width (W1) of the filament (hereinafter sometimes abbreviated as W2 / W1) is preferably 30% or more, and more preferably 40% or more. . On the other hand, as for the upper limit, W2 / W1 is preferably 55% or less, and more preferably 50% or less. In the filament for artificial hair of the present invention, the depth (H2) of the leaf crack is 5 to 30% of the height (H1) of the filament. The ratio of the leaf crack depth (H2) to the filament height (H1) (hereinafter sometimes abbreviated as H2 / H1) is preferably 10% or more, and more preferably 15% or more. More preferred. On the other hand, as for the upper limit, H2 / H1 is preferably 25% or less, and more preferably 20% or less. In the present invention, the values of the filament width (W1), the leaf crack width (W2), the filament height (H1), and the leaf crack depth (H2) satisfy the above relationship. It is defined that each value obtained for each leaf crack satisfies the relationship in all leaf cracks in the cross section of the filament.

Filament width (W1), leaf crack width (W2), filament height (H1), and leaf crack depth (H2) are defined as follows. A tangent line that touches both two adjacent leaf parts across one leaf crack is drawn, and the maximum distance between the filament contours in the direction parallel to the tangent line is defined as the filament width (W1), the tangent line and the leaf. The distance between two contact points with the part is defined as the width (W2) of the leaf crack part. The maximum distance between the filament contours in the direction perpendicular to the tangent is the filament height (H1), and the maximum depth in the direction perpendicular to the tangent is the leaf crack depth (H2). And

When either the ratio of the width of the leaf crack part to the width of the filament (W2 / W1) or the ratio of the depth of the leaf crack part to the height of the filament (H2 / H1) is below the above range, artificial hair In addition to making it difficult to obtain a sense of volume when used, it becomes difficult to obtain a natural glossy feeling because the irregularities on the filament surface are reduced. On the other hand, if either exceeds the above range, the leaf portion becomes thin, and yarn breakage or breakage is likely to occur.

In the filament for artificial hair of the present invention, the number of leaf portions of a multileaf shape is preferably 3 to 8, more preferably 3 to 6, and further preferably 3 or 4. If it is outside the above range, it tends to be difficult to satisfy the relationship between the width of the leaf crack and the width of the filament and the relationship between the depth of the leaf crack and the height of the filament.

The type of filament may be any type such as multifilament and monofilament, but is preferably a monofilament. In the case of a multifilament, the cross-sectional shape of each single yarn constituting it satisfies the above.

The fineness of the filament for artificial hair of the present invention is preferably 20 to 150 dtex. The fineness is more preferably 30 dtex or more, and further preferably 40 dtex or more. On the other hand, the upper limit is more preferably 130 dtex or less, still more preferably 100 dtex or less, and particularly preferably 70 dtex or less. Moreover, although the filament of a single fineness may be sufficient, you may use combining the filament of a several fineness within the said range. Here, in the case of a multifilament, the fineness of the filament means that the average value of the fineness of each single yarn constituting the filament is within the above range.

Furthermore, the filament for artificial hair of the present invention is a filament of a thermoplastic resin, and any type can be used as long as it is a thermoplastic resin. For example, polyester resin, polyamide resin, acrylic resin, polyvinyl chloride resin It is preferably at least one selected from the group consisting of a polyacrylonitrile resin, a polyphenylene sulfide resin, and a cellulose resin. Among these, polyester resins, polyamide resins, and polyphenylene sulfide resins are particularly preferable.

In addition, the filament for artificial hair of the present invention is provided with matting agents such as titanium oxide, calcium carbonate, kaolin, clay, pigments, dyes, lubricants, antioxidants, heat-resistant agents, heat-resistant agents, and light-resistant agents as necessary. , UV absorbers, antistatic agents, fluorescent agents, plasticizers, antibacterial agents, and the like.

The filament for artificial hair of the present invention may contain a known organic or inorganic flame retardant such as phosphorus, halogen or antimony trioxide in order to protect the human body from a fire hazard during use.

The filament for artificial hair of the present invention may be obtained by modifying the polyester constituting the filament for artificial hair for the purpose of preventing the filament from being stuck or entangled due to electric resistance, or adhering dust. It may be provided with a surface.

In the filament for artificial hair of the present invention, a known surfactant such as silicone may be applied to the filament surface in order to further improve combability.

The tensile strength and knot strength of the artificial hair filament of the present invention are preferably 1 to 5 cN / dtex and 0.5 to 3 cN / dtex, respectively. If it is the said range, it exists in the tendency for process permeability to become favorable in the process step of artificial hair products.

Further, the filament for artificial hair of the present invention preferably has a bending hardness of 0.03 to 0.25 cN. If it is the said range, it will be easy to feel the hair and the waist close to human hair.

Next, the production method of the filament for artificial hair of the present invention will be described, but the production method is not particularly limited, and a known spinning method can be adopted. Here, melt spinning will be described as an example, but the present invention is not limited to this.

First, various raw materials are charged into the hopper. Here, various additives may be mixed and supplied. The raw material is supplied from a hopper to a uniaxial extruder type melt spinning apparatus to perform melt spinning. The melting temperature at this time is preferably about the melting point of the thermoplastic resin to be used + 20 ° C. or so. The molten polymer is weighed with a gear pump in accordance with the final fineness of the filament, filtered through a metal filter in a spinning pack, and spun from a deformed die.

Next, the spun undrawn yarn is continuously guided into the cooling medium and cooled and solidified. Examples of the cooling medium include water and polyethylene glycol. However, the cooling medium is not particularly limited as long as it can be easily removed from the surface of the filament and does not change chemically or physically.

The unstretched yarn that has been cooled and solidified is subjected to one-stage heating or multi-stage drawing and heat setting in order to obtain the necessary strength as a filament. Examples of the heat medium used in this case include air, hot water, steam, polyethylene glycol, glycerin and silicone oil, but they can be easily removed from the filament surface, resulting in chemical and physical changes. If it does not give, it will not specifically limit.

The filament for artificial hair thus obtained is wound with a finishing oil attached as necessary.

The filament for artificial hair obtained by the above method may be subjected to known post-processing such as dyeing, alkali treatment, sand blasting, crimping, baking and curling as necessary.

The artificial hair product of the present invention uses the above-described artificial hair filament as at least a part of the hair material, and includes wigs, hair wigs, hair pieces, extensions, fur, doll hair, hair ornaments, and the like. These artificial hair products can be produced by a known method, and the production method of the artificial hair product itself is not particularly limited.

Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. In Examples and Comparative Examples, artificial hair filaments and artificial hair were evaluated by the following methods. In all tests, the measurement was performed after the sample was left for 24 hours or more under the conditions of a temperature of 20 ± 2 ° C. and a relative humidity of 65 ± 4%. Unless otherwise specified, the measurement was performed assuming that the number of n was 1.

(1) Fineness Four 500 mm samples were accurately taken under the initial load specified in JIS L 1013: 2010, the mass was measured, and the fineness was calculated by the following formula.

Fineness [dtex] = mass [g] × 10000/2.

(2) Sectional shape Filament samples 30 m were cut every 1 m, and five samples were arbitrarily extracted therefrom. Samples for cross-sectional observation cut out in the direction perpendicular to the fiber axis direction of the filament were prepared for five extracted samples. These samples were observed using a digital microscope (manufactured by Keyence Corporation, VHX-500F), and the following lengths were measured with a main measurement tool.

Draw a tangent line that touches both of the two adjacent leaf parts across one leaf fissure part, and the maximum value of the distance between the filament contours in the direction parallel to the tangent line (filament width W1), the tangent line and the leaf The distance between two contact points with the part (width of the leaf crack part · W2), the maximum value of the distance between the contours of the filament in the direction perpendicular to the tangent (filament height · H1), and the direction perpendicular to the tangent The maximum value of the leaf crack depth (leaf crack depth · H2) was measured. These values were measured for each leaf crack of each sample. Table 1 shows the result of each leaf crack as a representative for one sample.

(3) Physical property test According to JIS L 1013: 2010 8.5.1 and 8.6.1, tensile strength [N] and elongation [%], knot strength [N] and elongation [%] of the filament Was measured respectively. For the measurement, an autograph AG-50NIS manufactured by Shimadzu Corporation was used with a flat chuck attached, and a test with n = 5 was performed under the conditions of a sample length of 25 cm and a tensile speed of 30 cm / min.

(4) Sense of volume An artificial hair bundle having a length of 40 cm and a mass of 150 g was prepared, and comparison by sensory evaluation with the same amount of human hair sample was performed by 10 people. The evaluation criteria are as follows.

○ ・・ 8 or more people judged that there was a volume feeling equivalent to human hair,
△ ・・ 5-7 people judged that there was a volume feeling equivalent to human hair,
× ·· Four or fewer people were judged to have the same volume feeling as human hair.

(5) Porosity A straight artificial hair bundle having a length of 10 cm is prepared. This sample is placed in a container shown in FIG. 4 in a predetermined amount parallel to the length direction, and a load of 27 g (10 × 10 × 100 mm aluminum square) is applied, and 5-10 seconds after the load is applied. During the measurement, the height h [mm] was measured. Further, the mass m [g] of the sample in the container was measured. The predetermined amount refers to an amount such that the height after applying a load is 5 to 10 mm.

Next, using the same sample, a cross-sectional observation sample cut in a direction perpendicular to the fiber axis direction of the filament is observed using a digital microscope (manufactured by Keyence Corporation, VHX-500F), and main measurement is performed. The cross-sectional area A [mm ² ] of the single yarn was measured using a tool. The cross-sectional area was determined by measuring n = 50 and obtaining an average value.

From the above measured values, the porosity was calculated using the following formula.

(6) Glossiness (G value, half width)
As a gloss meter, “GP-200” manufactured by Murakami Color Research Laboratory Co., Ltd. is used, and as shown in FIG. 5 (a), a sample holder with a hole having a diameter of 36 mm is used at the center, and from the center line As shown in FIG. 5 (b), the diameter of the light source diaphragm is 10.5 mm and the diameter of the light receiving diaphragm is 9.1 mm, using 11 single yarns of a sample fixed at regular intervals within a total 6 mm width of 3 mm on each side. The reflectance with respect to the reflection angle was measured by applying light at an incident angle of 30 ° and rotating the light receiver by 0 to 90 °. The G value is calculated by the following formula (2) from the reflectance d at a reflection angle of 0 ° and the maximum reflectance Sf appearing near the reflection angle of 30 °, and the sample is changed for each measurement. Was calculated. The G value is an index of glossiness. The larger the G value, the stronger the glossiness due to regular reflection, that is, the stronger the glossiness.

G value = Sf / d Expression (2)
For the half width, the average value of the values (n = 5) obtained for each measurement was calculated. The full width at half maximum is an index of glare, and the smaller the full width at half maximum, the more reflective the direction and the glare.

(7) Glossiness A straight artificial hair bundle with a length of 40 cm and a mass of 150 g is compared with a human hair bundle at the window in a room exposed to direct sunlight, and is visually observed at an incident angle of sunlight of 10 ° to 55 °. Judgment was carried out. In addition, the same amount of artificial hair bundle was curled using a curling iron with a diameter of 32 mm under the condition of 130 ° C. × 30 seconds, and compared with a human hair bundle at the window in a room exposed to direct sunlight. Visual judgment was performed at angles of 10 ° to 55 °. Each evaluation standard is as follows.

○ ・・ Dull luster similar to human hair,
△ ・・ Slightly strong gloss,
× ·· Strong luster.

(8) Yarn cracking / yarn breakage test An artificial hair bundle having a length of 30 cm and a mass of 11 g is prepared, and one end of the hair bundle is fixed. On a horizontal table, roll a spherical weight of 5 kg in a direction perpendicular to the length of the hair 20 times, and then comb with a metal wig brush until there is no tangling of the hair bundle. After repeating this 5 times, the hair bundle was observed with a microscope. The evaluation criteria are as follows.

○ ・ No breakage of yarn or breakage of the hair tip was observed at all.
× ·· Some of them were observed to be broken or broken at the ends.

(9) Bending hardness A filament sample cut to a length of about 4 cm was prepared. Set the sample so that it touches the bottom of a 2mm diameter stainless steel rod installed in the horizontal direction at intervals of 10mm, and hangs a 1mm diameter stainless steel hook on the sample at the center of the stainless steel rod. Using a “TCM-200 universal tensile / compression tester”, the stainless steel hook was pulled up at a speed of 50 mm / min, and the maximum stress generated at this time was defined as the bending hardness. The measurement was performed with n = 3, and the average value was obtained.

[Example 1]
A polyethylene terephthalate chip having an intrinsic viscosity (measured at 25 ° C. in a mixed solvent of phenol and tetrachloroethane 1: 1) containing 2.5% by mass of cohesive silicon oxide particles (average particle size 2.43 μm) was obtained. And dried for 9 hours at 165 ° C. under vacuum. The chips are supplied to an extrusion-type spinning machine at 285 ° C., and the heat-melted resin composition is extruded from a three-leaf nozzle corresponding to the yarn cross-sectional shape of FIG. 1 (a) and immediately cooled in water at 30 ° C. Subsequently, the film was stretched 4.1 times under hot water at 55 ° C. and further under dry heat at 100 ° C., and then subjected to relaxation heat treatment in a dry heat atmosphere.

Next, the wound monofilament was immersed in a sodium hydroxide solution as an alkali treatment, the hair surface was dissolved, washed with water, and dried to obtain a straight polyester monofilament.

The polyester monofilament was dyed black using a conventional dyeing method with a high-pressure dyeing machine, and then subjected to reduction washing using a conventional washing method to obtain a straight dyed monofilament for artificial hair.

Table 1 shows the properties of the obtained filament for artificial hair.

[Example 2]
Using a polyethylene terephthalate chip having an intrinsic viscosity of 1.10 containing 1.5% by mass of colloidal silica (Silicia 730 manufactured by Fuji Silysia Chemical Co., Ltd.), an extrusion nozzle having three leaves corresponding to the yarn cross-sectional shape of FIG. A straight monofilament for artificial hair was obtained in the same manner as in Example 1 except that the nozzle was changed.

Table 1 shows the properties of the obtained filament for artificial hair.

[Examples 3 and 4, Comparative Examples 1 to 3]
A straight monofilament for artificial hair was obtained in the same manner as in Example 2 except that the extrusion nozzle was changed to a nozzle corresponding to each shape shown in Table 1.

Table 1 shows the properties of the obtained filament for artificial hair.

From Table 1, it was confirmed that the filaments for artificial hair according to the examples of the present invention were excellent in volume and gloss and were less likely to break or break.

On the other hand, filaments for artificial hair having a cross-sectional shape that does not satisfy the conditions of the present invention (Comparative Examples 1 to 3) are not only unnatural in volume and gloss, but also prone to yarn breakage and breakage, and artificial hair It was unsuitable for use as an industrial filament.

1 Filament for artificial hair 2 Leaf crack 3 Leaf 4 Load 5 Sample holder 6 Light source 7 Incident angle (30 °)
8 Light receiver (at a reflection angle of 0 °)
9 Receiver (position at 90 ° reflection angle)
H1 Filament height H2 Leaf fissure depth W1 Filament width W2 Leaf fissure width

Claims

A filament of a thermoplastic resin having a multi-leaf shape with a cross section perpendicular to the fiber axis having three or more leaf cracks, the width of the leaf crack being 10 to 60% of the width of the filament, and the depth of the leaf crack A filament for artificial hair whose length is 5-30% of the height of the filament.
The filament for artificial hair according to claim 1, wherein the number of leaf portions of the multi-leaf shape is 3 to 8.
The filament for artificial hair according to claim 1 or 2, wherein the single yarn fineness is 20 to 150 dtex.
The thermoplastic resin is at least one selected from the group consisting of polyester resins, polyamide resins, acrylic resins, polyvinyl chloride resins, polyacrylonitrile resins, polyphenylene sulfide resins, and cellulose resins. Item 4. The filament for artificial hair according to any one of Items 1 to 3.
An artificial hair product using the filament for artificial hair according to any one of claims 1 to 4 as at least a part of a hair material.