KR20160085792A - Filament for artificial hair and artificial hair product - Google Patents

Abstract

It is an object of the present invention to provide a filament for artificial hair which is excellent in volume feel and glossiness and is hard to cause yarn cracking or yarn breakage. Wherein the filament of the thermoplastic resin has a cross-sectional shape in the direction perpendicular to the fiber axis and is a multi-leaf shape having three or more lobed portions, the width W2 of the filament portion is 10 to 60% of the filament width W1, And the depth H2 is 5 to 30% of the height H1 of the filament.

Description

{FILAMENT FOR ARTIFICIAL HAIR AND ARTIFICIAL HAIR PRODUCT}

The present invention relates to a fiber for artificial hair used for a partial wig, a full wig, a hair extension or the like.

Conventionally, modacrylic fiber, vinyl chloride fiber, vinylidene chloride fiber, polyester fiber and nylon fiber have been used as the artificial hair fiber. In the production of artificial hair products such as partial wigs, full wigs, or hair extensions using these fibers, development of fibers suitable for these products has been repeated, and the cross-sectional shapes of the fibers have been researched and improved .

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

Also, fibers having a Y-shaped cross-sectional shape (see, for example, Patent Document 2) and fibers having a Y-shaped cross-sectional shape having a rounded tip (for example, see Patent Document 3) have been proposed.

Japanese Patent Application Laid-Open No. 2007-146306 International Publication No. 2008/029727 Japanese Patent No. 3365141

However, the fibers having a cross-sectional shape having a constriction at the central portion as proposed in Patent Document 1 are hard to feel volume, and the fibers are necessarily curved in the short diameter direction. For this reason, there is a problem in that the direction of the fibers is aligned on the curved surface and the luster feeling becomes unnatural. Further, there is a problem that it is difficult to express the three-dimensional feeling when the curl is applied. In the fiber having the cross-sectional shape proposed in Patent Document 2 or 3, The volume feeling is improved, but yarn splitting and yarn breakage are likely to occur due to external force, so that it is not satisfactory from the viewpoint of durability.

SUMMARY OF THE INVENTION The present invention has as its object to solve the problems in the above-described prior art.

Accordingly, an object of the present invention is to provide a filament for artificial hair which is excellent in volume feeling and glossiness and hardly causes yarn cracking or yarn breakage.

In order to achieve the above object, according to the present invention, there is provided a filament of a thermoplastic resin, wherein a sectional shape in a direction perpendicular to the fiber axis is a multi-leaf shape having three or more lobed portions, And the filament depth is 5 to 30% of the height of the filament.

In the artificial hair filament of the present invention,

The number of the leaflets in the multi-leaf form is 3 to 8,

A single fiber fineness of 20 to 150 dtex, and

Wherein the thermoplastic resin is at least one selected from the group consisting of a polyester resin, a polyamide resin, an acrylic resin, a polyvinyl chloride resin, a polyacrylonitrile resin, a polyphenylene sulfide resin and a cellulose resin

Can be given as preferable conditions. When satisfying these conditions, more excellent performance is achieved.

Further, the artificial hair product of the present invention is characterized in that the filament for artificial hair is used for at least part of the base material (hair material).

INDUSTRIAL APPLICABILITY According to the present invention, as described below, it is possible to obtain a filament for artificial hair which is excellent in volume feeling and glossiness and hardly causing yarn cracking or yarn breakage.

1 (a) to 1 (c) are cross-sectional views of the filament for artificial hair according to an example of the present invention in a direction perpendicular to the fiber axis.
2 (d) to 2 (f) are cross-sectional views of the filament for artificial hair according to another example of the present invention in a direction perpendicular to the fiber axis.
3 (g) to 3 (i) are sectional views of the filament for artificial hair of Comparative Example in the direction perpendicular to the fiber axis.
4 is a schematic diagram for explaining the container and measurement used for the porosity measurement.
Fig. 5 (a) is a schematic view of a specimen holder for measuring glossiness with 11 single yarns of a sample fixed. Fig. 5 (b) is a side view schematically showing the positions of the sample, the light source, and the light receiver in gloss measurement.

Hereinafter, the filament for artificial hair of the present invention will be described with reference to the drawings. Figs. 1 (a) to (c) and Figs. 2 (d) to 2 (e) are cross-sectional views of the filament for artificial hair according to the present invention in a direction perpendicular to the fiber axis. In each drawing, reference numeral 1 denotes a filament for artificial hair, 2 denotes a lobe portion, and 3 denotes a lobe portion. Further, the term "filament heat part" refers to a groove formed in the cross section along the fiber axis direction of the filament, but in the present specification, the recess part in the cross section is also described as the filament part. The term "leaf portion" refers to a portion between adjacent filaments, and the same concept as applied to a filament or cross-section is applicable to the filament portion.

The filament for artificial hair of the present invention has a multi-leaf shape in which the cross section in the direction perpendicular to the fiber axis has three or more filaments. In the present invention, it is important that the lobes on the cross section have such a specific shape. In this specification, unless otherwise specified, the section means a section perpendicular to the fiber axis.

The multi-leaf shape in the present invention is a shape having a plurality of leaf filaments and a leaf portion divided therefrom. For example, Figs. 1 (a) to (c) 2 (b) is referred to as four leaves, and FIG. 2 (c) is referred to as five leaves.

In the artificial hair filament of the present invention, the width W2 of the filament portion is 10 to 60% of the filament width W1. The ratio of the width W2 of the filament to the width W1 of the filament (hereinafter sometimes abbreviated as W2 / W1) is preferably 30% or more, more preferably 40% or more. On the other hand, as for the upper limit, W2 / W1 is preferably 55% or less, more preferably 50% or less. In the artificial hair filament of the present invention, the depth H2 of the filament is 5 to 30% of the height H1 of the filament. The ratio of the depth H2 of the filaments to the height H1 of the filament (hereinafter also abbreviated as H2 / H1) is preferably 10% or more, more preferably 15% or more. On the other hand, as for the upper limit, it is preferable that H2 / H1 is 25% or less, more preferably 20% or less. In the present invention, when the respective values of the width W1 of the filament, the width W2 of the filament portion, the height H1 of the filament, and the depth H2 of the filament portion satisfy the above- In each leaf row, each value obtained for each leaf row is defined as satisfying the above relationship.

The width W1 of the filament, the width W2 of the filament portion, the height H1 of the filament, and the depth H2 of the filament portion are defined as follows. A tangent line which is in contact with both adjacent two leaf portions across one filament heating portion is drawn and the maximum value of the distance between the contours of the filament in the direction parallel to the tangent line is defined as the width W1 of the filament, The distance between two contact points is defined as the width W2 of the leaf column portion. The maximum value of the distance between the contours of the filaments in the direction perpendicular to the tangent line is set as the height H1 of the filament and the depth of the filaments in the direction perpendicular to the tangent is the depth H2 of the filament.

When any one of the ratio (W2 / W1) of the width of the filament to the width of the filament and the ratio (H2 / H1) of the depth of the filament to the height of the filament is less than the above range, It is difficult to obtain a feeling of volume, and the unevenness of the surface of the filament becomes small, so that it is difficult to obtain a natural luster. On the other hand, when any one of them exceeds the above-mentioned range, yarn fragments and thread breakage tend to occur due to thinning of the leaf portions.

In the artificial hair filament of the present invention, the number of the multi-leafed leaf portions 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 filament opening and the filament width and the relationship between the depth of the filament opening and the height of the filament.

Regarding the kind of the filament, it is preferable that it is a monofilament regardless of the kind of the multifilament, the monofilament and the like. Further, in the case of a multifilament, it is assumed that the cross-sectional shape of each single yarn constituting the multifilament 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 more preferably 40 dtex or more. On the other hand, the upper limit is more preferably 130 dtex or less, more preferably 100 dtex or less, and particularly preferably 70 dtex or less. It may be a single fineness filament, but a plurality of fineness filaments may be used in combination within the above range. Here, the fineness of filaments means that in the case of multifilaments, the average value of fineness of each single yarn constituting it is within the above range.

The filaments for artificial hair of the present invention are filaments of a thermoplastic resin. The filaments for the hair of the present invention are thermoplastic resins, and any kind of thermoplastic resin may be used. For example, polyester resin, polyamide resin, acrylic resin, polyvinyl chloride resin, polyacrylonitrile resin , A polyphenylene sulfide-based resin, and a cellulose-based resin. Among these, a polyester resin, a polyamide resin, and a polyphenylene sulfide resin are particularly preferable.

In addition, the hair filament for artificial hair of the present invention may contain, if necessary, a colorant such as titanium oxide, calcium carbonate, kaolin, and clay, a pigment, a dye, a lubricant, an antioxidant, a heat- , A fluorescent agent, a plasticizer, an antibacterial agent, and the like.

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

The filament for artificial hair of the present invention may be one obtained by modifying the polyester constituting the filament for artificial hair for the purpose of preventing entanglement or entanglement or adhesion of dust due to the electric resistance of the filament, It may be something that has been granted.

To the filament for artificial hair of the present invention, a known surfactant such as a silicon-based surfactant may be imparted to the filament surface in order to further improve the combability.

The tensile strength and the nodule 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. Within the above-mentioned range, there is a tendency that process passability in the processing step of artificial hair products becomes good.

The filament for artificial hair of the present invention preferably has a bending hardness of 0.03 to 0.25 cN. In the above range, hair elasticity close to human hair is likely to be felt.

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

First, various raw materials are fed into the hopper. Here, various additives may be mixed and supplied. The raw material is supplied from the hopper to the single-shaft extruder type melt-spinning device to perform melt spinning. The melting temperature at this time is preferably about the melting point + 20 占 폚 of the thermoplastic resin to be used. The molten polymer is metered to the final fineness of the filaments in the gear pump and then filtered with a metal filter in a spinning pack and discharged from the spinneret.

Next, the released undrawn yarn is then guided into the cooling medium and cooled and solidified. As the cooling medium, for example, water or polyethylene glycol may be mentioned, but it is not particularly limited as long as it can be easily removed from the surface of the filament, and does not give a chemical or physical inherent change.

In order to obtain the required strength as a filament, the undrawn filament which has been cooled and solidified is subjected to one-stage heating or multi-stage drawing and heat setting. The heating medium used herein may also be air, hot water, steam, polyethylene glycol, glycerin, silicone oil and the like. However, it can be easily removed from the surface of the filament, and if it does not chemically and physically impart intrinsic changes, I never do that.

The filaments for artificial hair thus obtained are adhered and wound with a finish oil agent if necessary.

The artificial hair filament obtained by the above method may be subjected to known subsequent processing such as dyeing, alkali treatment, sandblasting, crimping, yaki, and curling, if necessary.

The artificial hair product of the present invention includes the partial wig, the whole wig, the hair piece, the hair extension, the attached wig, the doll hair, the hair ornaments, and the like, using the artificial hair filament as at least a part of the base material. These artificial hair products can be manufactured by a known method, and the production method of the artificial hair product itself is not particularly limited.

Example

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited thereto. In the examples and comparative examples, the evaluation of the artificial hair filament and the artificial hair was carried out in the following manner. In all the tests, the sample was allowed to stand for 24 hours or more under the conditions of a temperature of 20 ± 2 ° C. and a relative humidity of 65 ± 4%, and then the measurement was carried out. Unless otherwise specified, the measurement was carried out with the number of measurement n set at 1.

(1) Fineness

(Initial load) prescribed in JIS L 1013: 2010 was applied, and four samples of exactly 500 mm were taken and the mass was measured, and the fineness was calculated by the following equation.

Fineness [dtex] = mass [g] x 10000/2

(2) Cross-sectional shape

The filament sample 30 m was cut every 1 m, and five samples were arbitrarily extracted therefrom. Five samples of the extracted samples were cut out in the direction perpendicular to the direction of the fiber axis of the filaments to prepare a sample for cross-sectional observation. These samples were observed using a digital microscope (VHX-500F, manufactured by Kabushiki Kaisha Kensen), and the following respective lengths were measured with a main measuring tool.

(The width W1 of the filament) of the contours of the filaments in a direction parallel to the tangent line, and the ratio of the tangent line to the tangent line (Filament height H1) of the distance between the two contact points (width W2 of the filament of the filament), the contour of the filament in the direction perpendicular to the tangent line, and the depth of the filament in the direction perpendicular to the tangent The maximum value (depth of leaf column H2) was measured. These values were measured for each column of each leaf of each sample. In Table 1, the results of each column of leaves are represented for one sample.

(3) Property test

The tensile strength [N] and elongation [%], nodule strength [N] and elongation [%] of filaments were measured according to JIS L 1013: 2010, 8. 5.1 and 8.6.1. For the measurement, an equilibrium chuck was used in Autograph AG-50NIS manufactured by Shimadzu Seisakusho Co., Ltd., and a test of n = 5 was carried out under conditions of a sample length of 25 cm and a tensile rate of 30 cm / min.

(4) Volume sense

A length of 40 cm, and a mass of 150 g, and 10 persons were compared by sensory evaluation with the same amount of human hair samples. The evaluation criteria are as follows.

○ · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

△ ... 5 to 7 people judged to have the same sense of volume as the human body

× ‥ It was less than 4 people judged to have volume feeling equivalent to human hair

(5) porosity

Prepare a bundle of straight artificial hair of 10 cm in length. The sample was placed in a container shown in Fig. 4 in a predetermined amount in parallel in the lengthwise direction, loaded with a load of 27 g (aluminum sheet having a size of 10 x 10 x 100 mm), and dropped in a period of 5 to 10 seconds The height H [mm] was measured. The sample mass m [g] in the container was also measured. Further, the predetermined amount is an amount that the height after application of the load becomes 5 to 10 mm.

Next, using the same sample, a sample for cross-sectional observation cut in a direction perpendicular to the fiber axis direction of the filament was observed using a digital microscope (VHX-500F, manufactured by Kabushiki Kaisha Kaien) Sectional area A [mm < 2 >] of single yarn was measured. The cross-sectional area was obtained by measuring n = 50.

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

(6) Glossiness (G value, half width)

As a gloss meter, " GP-200 " manufactured by Murakami Shikisai Co., Ltd. was used, and as shown in Fig. 5 (a), using a sample holder having a hole with a diameter of 36 mm in the center, 11 single pieces of the sample fixed at equal intervals in a system of 6 mm width on both sides of 3 mm on both sides from the center line were used as samples and the diameter of the light source diaphragm was 10.5 mm and the diameter of the light receiving diaphragm was 9.1 mm, As described above, the reflectance with respect to the reflection angle was measured by receiving light at an incident angle of 30 ° and rotating the receiver at 0 to 90 °. The G value is calculated from the reflectance d at the reflection angle of 0 占 and the maximum reflectance Sf at the reflection angle of 30 占 by the following equation (2), and the sample is varied for each measurement to calculate the average value at n = 5 Respectively. The G value is an index of glossiness, and the larger the G value, the stronger the glossiness due to the specular reflection, that is, the glossiness is strong.

G value = Sf / d ... Equation (2)

The average value of the values obtained for each measurement (n = 5) was also calculated for the half width. The half-value width is an index of glare, and the smaller the half width is, the more reflex is given because the reflection is directional and gives a sense of glare.

(7) shiny feeling

A bundle of straight artificial hair having a length of 40 cm and a mass of 150 g was judged by visual observation at an incident angle of 10 to 55 degrees of daylight compared with a human bundle at the window of a room exposed to direct sunlight. In addition, the same amount of artificial hair bundle was curled under the condition of 130 占 폚 for 30 seconds by using curled irons having a diameter of 32 mm and compared with the human hair bundle at the window of the room exposed to direct sunlight, ° in accordance with the time of day. Each evaluation criterion is as follows.

○ ‥ Inherent shine resembling human hair

△ slightly strong gloss

× ‥ strong gloss

(8) Thread cracking and thread breaking test

An artificial hair bundle having a length of 30 cm and a mass of 11 g is produced, and one end of the bundle of hair is fixed. On a horizontal die, a spherical weight of 5 kg in weight is twisted 20 rounds in a direction perpendicular to the longitudinal direction of the hair, and then combed with a metallic wig brush until the entanglement of the hair bundle disappears. After repeating this 5 times, the bundles of hair were observed with a microscope. The evaluation criteria are as follows.

○ ‥ Thread cracks and thread breaks were not observed at all

× ‥ Thread cracks and thread breaks were observed.

(9) Bending hardness

A filament sample cut to a length of about 4 cm was prepared. Two stainless steel rods having a diameter of 2 mm provided horizontally at intervals of 10 mm were set in contact with the sample under the stainless steel rod. A stainless steel hook having a diameter of 1 mm was placed at the center of the stainless steel rod, A stainless steel hook was pulled up to a speed of 50 mm / min using a TCM-200 universal tensile / compression tester, and the maximum stress generated at this time was defined as a bending hardness. In the measurement, the average value was obtained by setting n = 3.

[Example 1]

A polyethylene terephthalate chip having an intrinsic viscosity (measured at 25 캜 in a mixed solvent of phenol and tetrachloroethane at 25 캜) containing coagulating silicon oxide particles (average particle diameter: 2.43 탆) of 2.5% by mass was heated at 165 캜 for 9 hours And dried. The chip was fed to an extruding type radiator at 285 DEG C, and the heat-melted resin composition was extruded from a nozzle of three lobes corresponding to the actual cross-sectional shape of Fig. 1 (a), immediately cooled in water at 30 DEG C, And then stretched 4.1 times in hot water at 55 ° C and further at 100 ° C in dry heat (dry heat), followed by relaxation heat treatment in a dry heat atmosphere.

Next, the wound monofilament was immersed in a sodium hydroxide solution as an alkali treatment to melt-process the surface of the base material, followed by washing with water and drying to obtain a straight polyester monofilament.

The polyester monofilaments were dyed black in the high-pressure dyeing machine using the dyeing method of the conventional method and then subjected to reduction washing using the cleaning method of the conventional method to obtain dyed monofilaments for artificial hair.

Table 1 shows the properties of the obtained artificial hair filaments.

[Example 2]

A polyethyleneterephthalate chip having an intrinsic viscosity of 1.10 and containing 1.5 mass% of colloidal silica (Silysia 730 manufactured by Fuji Silysia Kagaku) was used, and the extrusion nozzle was filled with 3 A monofilament for artificial hair for straight hair was obtained in the same manner as in Example 1 except that the nozzle was changed to a lobe.

Table 1 shows the properties of the obtained artificial hair filaments.

[Examples 3 and 4, Comparative Examples 1 to 3]

Straight artificial hair monofilaments were obtained in the same manner as in Example 2 except that the extrusion nozzles were changed to nozzles corresponding to the respective shapes shown in Table 1. [

Table 1 shows the properties of the obtained artificial hair filaments.

From Table 1, it was confirmed that the filament for artificial hair of the example of the present invention is excellent in volume feeling and glossiness, and is hard to cause yarn cracking and yarn breakage.

On the other hand, the artificial hair filaments (Comparative Examples 1 to 3) each having a cross-sectional shape that does not satisfy the conditions of the present invention are not only unnatural in volume feeling and glossiness but also easy to cause yarn cracking and yarn breakage, .

1: filament for artificial hair
2:
3: Leaf
4: Load
5: Sample holder
6: Light source
7: Incidence angle (30 °)
8: Receiver (position with a reflection angle of 0 °)
9: Receiver (position with a reflection angle of 90 °)
H1: Height of filament
H2: Depth of the foliage
W1: Width of filament
W2: Width of the leaf column

Claims (5)

Wherein the width of the filaments is 10 to 60% of the width of the filaments, the depth of the filaments of the filaments is greater than the filament length of the filaments, To 5% of the height of the filament. The artificial hair filament according to claim 1, wherein the number of the multi-leafed leaf parts is 3 to 8. The artificial hair filament according to claim 1 or 2, wherein the monofilament fineness is 20 to 150 dtex. The thermoplastic resin composition according to any one of claims 1 to 3, wherein the thermoplastic resin is at least one selected from the group consisting of a polyester resin, a polyamide resin, an acrylic resin, a polyvinyl chloride resin, a polyacrylonitrile resin, Resin and a cellulose-based resin, wherein the filament is at least one selected from the group consisting of a resin and a cellulose-based resin. An artificial hair product using the artificial hair filament according to any one of claims 1 to 4 as at least a part of a base material (hair material).

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