KR101562284B1 - Synthetic Hair Filament and Process for Preparing Same - Google Patents

Abstract

The artificial hair fiber according to the present invention has a sheath-core structure comprising a core part (A) and a sheath part (B) surrounding the core part (A), wherein the core part (A) comprises a polycarbonate resin, (B) comprises a polyamide resin, a polyester resin or a mixture thereof, and has the same curl forming property as a natural hair at a heating temperature of 130 to 200 DEG C of a hair curling tool .

Description

Technical Field [0001] The present invention relates to a synthetic hair fiber,

The present invention relates to artificial hair fibers having a sheath-core structure and a method for producing the same. More specifically, the present invention relates to a method for producing a laminate comprising a core portion (A) comprising a polycarbonate resin, a polyarylate resin or a mixture thereof, and a sheath containing a polyamide resin, a polyester resin, (B) and exhibits the same hair iron curl property as that of natural hair, and has excellent flame retardancy, heat resistance, touch, and the like.

Artificial hair, which is mainly used as a wig fiber, requires curl formation, curl retention, flame retardancy, heat resistance, vivid color, natural gloss, lightness, heat resistance, soft touch and flexibility. Here, the curl forming ability means a function of easily forming curls like human hair when curling is made with a domestic hair iron or hair styling stove hair iron. Such curl forming is an important function that artificial hair replacing human hair should have. In addition, it must be able to withstand the shrinkage or thermal deformation of the fiber irons at a temperature at which a curled shape can be formed by a hair iron.

Conventionally, PVC fibers and modacrylic fibers have been used as wig-forming fibers. However, these fibers have excellent flame retardancy but lack heat resistance, which causes the problem that the shape of the yarn is deformed when the hair is handled by a consumer using a hair dryer or a hair iron at home.

In order to solve such disadvantages, polyester based artificial hair having a resin having a relatively high heat distortion temperature as a main component has been used. Polyester artificial hair is made of resins such as PET, PBT, and PTT. These polyester resins have relatively high heat resistance, but they are easily burned. Therefore, in order to be used as artificial hair, flame retardant should be added to impart flame retardancy. A number of known techniques for using these polyester resins as the artificial hair after the flame retardation are disclosed.

The present inventors have already disclosed Korean Patent No. 0714782 concerning a technique for producing flame retardant artificial hair comprising a polyester resin and a high-molecular-weight brominated flame retardant.

Polyester flame retardant artificial hair is usually used alone or in combination with human hair to make a wig product. In the process of manufacturing a wig product, the curl style is fixed by steam or air heated to 90 to 120 ° C., The product is used as is. If you want to change your hairstyle while using it, you can change the curl style in your home or hairdressing salon. The appliance used here is a hairdressing appliance such as a household hair iron or stove iron.

However, when artificial hair is processed in a home or beauty salon, artificial hair made of polyester as a base resin is not made as quickly as curls when curling using a hair iron. Polyester artificial hair has a disadvantage in that curl is maintained only after the curl is formed at high temperatures and the curling of the curl is performed after removing the hair irons. In other words, when a hair is made by a hair iron, the human hair forms curls even if it is heated only for about 5 seconds, whereas the PET type artificial hair is heated for about 10 seconds and then the hair iron is removed, You can get the desired curl. This curl formation process is a very uncomfortable problem when it is desired to change the style of wig curl from a hair salon to an iron hair which desires quickness.

On the other hand, a method has been developed in which the artificial hair fibers are made to have a sheet-core structure so that the properties of each polymer can be utilized. Japanese Patent Application Laid-Open No. 3-185103 discloses a fiber for artificial hair in which a PET resin is disposed as a core component and a polyamide resin is disposed as a sheath component. In Japanese Patent Laid-Open No. 1-282309, A hair for artificial hair is known in which an amide resin is disposed and a nylon 46 resin is disposed on a sheath component. Korean Patent Laid-Open Publication No. 2007-0094661 discloses a fiber for artificial hair wherein a semiaromatic polyamide is disposed as a core component and a linear saturated aliphatic polyamide component is disposed as a sheath component, and a manufacturing method thereof. However, since the artificial hair of the known sheath-core structure uses a flammable resin, it is not suitable as a fiber for artificial hair requiring high flame retardancy, and for use as a fiber for artificial hair using a stove iron- There is a functional problem. Therefore, it is necessary to select a material suitable for the sheath portion and the core portion, even if the artificial hair is a sheath-core structure.

Accordingly, the present inventors have found that when a polycarbonate resin, a polyarylate resin, or a mixture thereof is used as the core portion (A) and a polyamide resin, a polyester resin, or a mixture thereof is used as a sheath portion (B) The present invention has been completed to develop artificial hair fibers having excellent flame retardance, heat resistance, and feel, and a method for producing the same.

It is an object of the present invention to provide artificial hair fibers in which curling can be easily formed at a hair curling iron heating temperature in the range of 130 to 200 占 폚 to enable a consumer to freely form curls with a hair iron or a stove iron at home.

Another object of the present invention is to provide artificial hair fibers having excellent curl-forming properties, curl retention properties, flame retardancy, heat resistance, and feel.

Another object of the present invention is to provide a wig to which the artificial hair fibers are applied.

These and other objects of the present invention can be achieved by the present invention which is described in detail.

The artificial hair fiber according to the present invention has a sheath-core structure comprising a core part (A) and a sheath part (B) surrounding the core part (A), wherein the core part (A) comprises a polycarbonate resin, A resin or a mixture thereof, and the sheath portion (B) comprises a polyamide resin, a polyester resin or a mixture thereof.

In the present invention, it is preferable that the core portion (A) is 50 to 80% by weight and the sheath portion (B) is 20 to 50% by weight.

The flame retardant may further include a flame retardant in the core portion (A), the sheath portion (B), or both (A, B). The flame retardant is contained in an amount of 14 to 20 parts by weight based on 100 parts by weight of the polycarbonate resin and may be contained in an amount of 6 to 14 parts by weight based on 100 parts by weight of the mixture of the polycarbonate resin and the polyarylate resin.

The flame retardant may be contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the shampoo part (B). The flame retardant may be a brominated flame retardant.

As the polyester resin, a polyalkylene terephthalate resin may be used, and preferably a polycyclohexanedimethylene terephthalate (PCT) resin may be used. Further, PA6 or PA66 may be used as the polyamide resin.

A heat stabilizer, a light stabilizer, a UV stabilizer, a fluorescent agent, an antioxidant, an antistatic agent, a pigment, a dye, a plasticizer, a lubricant, a flame retardant, or a flame retardant is added to the core part (A), the sheath part (B) An additive, and an inorganic filler.

The fineness of the artificial hair fibers of the present invention may be 30 to 100 denier.

The present invention also provides a wig using artificial hair fibers having the above-mentioned sheath-core structure.

The present invention also provides a method for producing artificial hair fibers. The production method is characterized by comprising 50 to 80% by weight of pellets (I) for a core comprising a polycarbonate resin, a polyarylate resin or a mixture thereof and a flame retardant and a sheath containing a polyamide resin, a polyester resin or a mixture thereof, And melt spinning 20 to 50% by weight of pellets (II) for spinning into a sheet-core spinneret.

The artificial hair fibers according to the present invention are excellent in basic properties such as flame retardancy, heat resistance, curl retention, and feel required as a wig yarn, while curling is formed simultaneously with heating at a hair curling iron temperature of 130 to 200 캜.

FIG. 1 is a perspective view of artificial hair fibers having a sheath-core structure according to one embodiment of the present invention.
2 (a) to 2 (d) are specific examples of vertical cross-sections of artificial hair fibers having a sheath-core structure.

TECHNICAL FIELD The present invention relates to artificial hair fibers, and relates to artificial hair fibers in which curling is formed at the same time as heating at a hair heating iron heating temperature of 130 to 200 캜.

The artificial hair fiber of the present invention has a sheath-core structure comprising a core part (A) and a sheath part (B) surrounding the core part (A). The core part (A) is made of polycarbonate resin, polyarylate resin Or a mixture thereof, and the shoe part (B) comprises a polyamide resin, a polyester resin or a mixture thereof, whereby the hair curling iron temperature is in the range of 130 to 200 DEG C, . Hereinafter, the details will be described in detail.

Artificial hair fiber

1 is a schematic view of artificial hair fibers having a sheath-core structure according to the present invention. As shown in FIG. 1, the artificial hair fiber of the present invention has a structure in which the sheath portion B surrounds the core portion A with the core portion A as a center.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of artificial hair fibers having a sheath-core structure according to one embodiment of the present invention. FIG. As shown in FIG. 1, the artificial hair fiber of the present invention has a structure in which the shaving portion B surrounds the core portion A and the outside of the core portion.

2 is a vertical cross-sectional view of artificial hair fibers having a sheath-core structure. In one embodiment, as shown in FIG. 2 (a), one core portion A may be provided in the shroud B. In another embodiment, as shown in FIG. 2 (b), two core portions A may be formed in the shaving portion B. In another embodiment, the shaving portion B may be formed as shown in FIG. 2 (c) Three core portions A may be formed inside. Further, although not shown, a composite core structure in which four or more core portions are formed in one sheet portion can also be provided.

In another embodiment, the sheath-core structure may have an irregular shape that is not concentric. For example, peanut-shaped, star-shaped, elliptical, hollow elliptical or the like can be used. Also, the sheath-core structure is not necessarily limited to the same form. For example, the sheath may be peanut-shaped, star-shaped, elliptical or hollow elliptical, while the core portion may be circular, and vice versa. FIG. 2 (d) is an example of a composite core structure in which the sheath portion is a peanut-shaped core portion and the core portion is circular.

The core portion is 50 to 80 wt% of the total artificial hair fibers, and the shoe portion is 20 to 50 wt%. When the proportion of the shisu portion is less than 20 wt%, the resin of the core portion is likely to protrude due to rupture of the shisu portion, and effects such as tactile feeling, heat resistance, solvent resistance and melt dripping property are insufficient. If the ratio of the shoe part is more than 50% by weight, there is a problem that desired curl can not be easily obtained. Preferably, the core portion is 60 to 80 wt% of the total artificial hair fibers, and the shoe portion is 20 to 40 wt%.

Core portion (A)

The core part (A) of the present invention is a non-crystal clear paper, and includes polycarbonate (PC) resin, polyallylate (PAR) resin or a mixture thereof. In the present invention, the core part (A) resin contributes to express the curl of the same hair curling tool as the human hair.

Polycarbonate (PC) resins are typical engineering plastics and are used in electronic equipment, office automation equipment, auto parts, stationary materials, and medical equipment. This resin has very high mechanical strength, strong bending strength, transparency, and high impact strength. And the glass transition temperature (Tg) is 130 to 140 ° C. However, the copolymer polycarbonate (PC) resin has a glass transition temperature of 160 to 200 캜 and is very high in heat resistance. Therefore, it is made into a copolymer to improve the heat resistance.

Polycarbonate (PC) resins include general-purpose PCs and heat-resistant PCs. The general-purpose PC has a glass transition temperature of 130 to 140 DEG C, so that hair curling temperature enables curling like hair at a relatively low temperature of around 130 DEG C. On the other hand, heat-resistant PCs exhibit curl like human hair at high temperatures around 200 ° C. Therefore, it is possible to adjust the temperature by controlling the ratio of heat-resistant PC.

The general-purpose PC can be produced by an interfacial polycondensation method of bisphenol A and phosgene, or by a transesterification method of bisphenol A and a carboxylic acid derivative (diphenyl carbonate) ester, but is not limited thereto.

The general-purpose PC preferably applicable to the present invention is represented by the following general formula (1).

The heat resistant PC regulates the heat resistance temperature as bisphenol A, bisphenol TMC (trimethylcyclohexanone) and carbonic acid derivative copolymer polycarbonate. The glass transition temperature (Tg) may be 160, 170, 180, 190, 200 占 폚 depending on the copolymerization ratio.

Heat resistant PC is a copolymerized polycarbonate resin which contributes greatly to the effect of the present invention, and includes a component in which a methyl group is substituted with trimethyl cyclohexane in the bisphenol A structure as a copolymerization component. The glass transition temperature of PC is adjusted to 160 to 200 占 폚 according to the copolymerization ratio of this component.

The heat-resistant PC preferably applicable to the present invention is represented by the following formula (2).

However, when using polycarbonate (PC) resin, additional flame retardant should be added if flame retardancy is required.

Polyarylate (PAR) resins are typical engineering plastics and are used in the fields of electronics, automobiles, and machinery. The polyarylate (PAR) resin may be prepared by interfacial polymerization from a mixed acid of terephthalic acid and isophthalic acid and bisphenol A, but is not limited thereto. The polyarylate (PAR) resin is a polycondensate of divalent phenol and aromatic dicarboxylic acid chloride, and can be produced by both melt polymerization, solution polymerization and interfacial polymerization. In the present invention, however, Relat (PAR) resin was used. The polyarylate (PAR) resin exhibits high heat resistance, flame retardance, and mechanical properties because it contains aromatic rings and ester groups at high density in the main chain.

The polyarylate (PAR) resin which can be preferably applied to the present invention is represented by the following formula (3).

Poly 4,4'-isopropyridine diphenylterephthalate copolymer

Polyarylate (PAR) resins are currently limited to commercially available resins. A resin having a glass transition temperature of 193 DEG C is suitable for the present invention. When this resin is used, it is possible to control the curling suitability by blending a certain amount of a general-purpose PC. This resin has a limit oxygen index (LOI) of 37 and is highly flame retardant, so it has an advantage that flame retardancy can be imparted even if no additional flame retardant is added. Also, the specific gravity is as low as 1.21.

The polyarylate (PAR) resin is a hair iron, and has the property of showing the same curl-forming properties as the hair during curling operation. Also, since the molecular chain contains a large amount of aromatic ring, it has excellent flame retardancy. The visible light transmittance of the water-repellent material is very high, and thus it is suitable as artificial hair requiring a clear color. Also, it has a resin specific gravity of 1.21, which is lighter than human hair, so light artificial hair can be made so that it is comfortable to wear.

However, the polyarylate (PAR) resin is impregnated with a halogenated hydrocarbon, an aromatic solvent, or an ester solvent, and is hydrolyzed at a high temperature. It has a limit oxygen index (LOI) of 36% and a refractive index of 1.610. The polyarylate (PAR) resin is soluble in aromatic hydrocarbons such as acetone, benzene, toluene, ethyl acetate, and methyl ethyl ketone, halogenated hydrocarbons, esters, and ketone solvents.

Since the polycarbonate (PC) resin and the polyarylate (PAR) resin are amorphous resins, they are dissolved in the bond for wig which is attached during the sewing process of twin needle, and the fibers are cut. In addition, when a stress crack occurs, there is a problem that the fiber is weakened during the friction process.

Accordingly, the present inventors have found that by disposing a polycarbonate resin, a polyarylate resin or a mixture thereof in a core portion with a fiber structure of a sheath-core structure and arranging a polyamide resin, a polyester resin or a mixture thereof in the sheath portion We have developed artificial hair fibers suitable for artificial hair with curling characteristics such as human hair.

The core part (A) of the present invention may contain a flame retardant. As the flame retardant, a bromine-based flame retardant may be used, and in particular, a polymer-type bromine-based flame retardant is preferable. Examples of the polymer type brominated flame retardant include a polybromostyrene flame retardant, a polydibromostyrene copolymer flame retardant, and a brominated epoxy flame retardant. In the present invention, a polymer type brominated flame retardant may be preferably used, and more preferably, a brominated epoxy flame retardant or a brominated phenoxy flame retardant may be used. The brominated epoxy flame retardant has a repeating unit represented by the following formula (4).

In the above formula, n is a degree of polymerization ranging from 17 to 100.

Preferably, the polymeric brominated epoxy flame retardant has a number average molecular weight in the range of 20,000 to 80,000. If the number average molecular weight is less than 20,000, the dripping resistance may be poor. If the number average molecular weight exceeds 80,000, uniform mixing with the polyester resin may not be achieved, And the fineness tends to be uneven. More preferably, the polymer type brominated flame retardant is 30,000 to 60,000. In other embodiments, conventional polybromostyrene flame retardants and polydibromostyrene copolymer flame retardants may be used together with or instead of the brominated epoxy flame retardants.

In the present invention, the flame retardant may be contained in an amount of 14 to 20 parts by weight based on 100 parts by weight of the polycarbonate resin. When the amount of the flame retardant is less than 14 parts by weight, sufficient flame retardancy can not be obtained and a drip may occur during combustion. If the amount is more than 20 parts by weight, uniform mixing can not be performed and fiber formation can not be performed, and the occurrence of yarn breakage upon melt spinning of the artificial hair fibers may be increased.

The flame retardant may be contained in an amount of 6 to 14 parts by weight based on 100 parts by weight of the mixture of the polycarbonate resin and the polyarylate resin. The polyarylate resin has a flame retardant property. Therefore, when the polycarbonate resin and the polyarylate resin (PC / PAR) are mixed, the addition amount of the flame retardant is smaller than that of the polycarbonate resin (PC) alone.

(B) resin

The sheath portion (B) of the present invention includes a polyester resin, a polyamide resin or a mixture thereof. In the present invention, the resin of the shoe part (B) performs the function of giving the touch part, the heat resistance, and the flame retardancy similar to the main function and the human hair which are not soluble in the weak part of the core part (A) resin.

As the polyester-series resin, a polyalkylene terephthalate resin, that is, a resin such as PET, PCT, PBT, PTT, or PEN may be used. These may be used alone or in combination of two or more. When a polycyclohexanedimethylene terephthalate resin (PCT) is used, a cyclohexane ring is present in the molecular structure, and therefore, it has a high melting point and is most preferable from the viewpoint of heat resistance.

The PCT resin is derived from a cycloaliphatic diol having 6 to 20 carbon atoms and an aromatic diacid having 6 to 20 carbon atoms. In a specific example, a polymer obtained by condensation polymerization of terephthalic acid and / or a derivative thereof with 1,4-cyclohexane dimethanol by directly esterifying or transesterifying may be used. As the terephthalic acid derivative, dimethyl terephthalate may be used. In another embodiment, 1,4-cyclohexanedimethanol is used as the diol component and 80 to 99% of terephthalic acid and / or its derivative and 1 to 20% of isophthalic acid and / or its derivative are used as the diepoxide component Copolymers can be used. The polycyclohexane dimethanol terephthalate resin of the present invention preferably has an intrinsic viscosity [?] Of 0.7-1.1 dl / g, more preferably 0.75-1.0 dl / g as measured at room temperature (25 ° C) in an o- dl / g. When the intrinsic viscosity is less than 0.7 dl / g or more than 1.1 dl / g, it is difficult to uniformly mix with the flame retardant agent, which may increase the occurrence of threading in the spinning and drawing process. In another embodiment of the present invention, the polycyclohexanedimethanol terephthalate is dissolved in a solvent selected from the group consisting of diethylene glycol, trimethylol propane, pentaerythritol, 4-hydroxybenzoic acid, polytetramethylene glycol (PTMG), polyethylene glycol (PEG) (PPG), a low molecular weight aliphatic polyester, or an aliphatic polyamide.

The polyamide-based resin may be a nylon 6 resin comprising a ring-opening polymer of caprolactam or a nylon 66 resin comprising a copolymer of hexamethylenediamine and adipic acid. In the present invention, aliphatic polyamide resins such as PA 66 and PA 66 resins are suitable for imparting a soft touch like human hair, but the present invention is not limited thereto.

The shoe part (B) of the present invention may contain a flame retardant. The flame retardant may be included in an amount of 10 to 30 parts by weight based on 100 parts by weight of the shoe part (B). When the amount of the flame retardant is less than 10 parts by weight, sufficient flame retardancy can not be obtained and a drip may occur during combustion. If the amount is more than 30 parts by weight, uniform mixing can not be performed and fiber formation is impossible, and occurrence of yarn splicing upon melt spinning may increase. The matters other than the flame retardant used in the shoe part are the same as the flame retardant used in the core part and are not described in order to avoid the overlapping substrate.

Quencher

(A), the sheath portion (B), or both (A) and (B) of the present invention. When a quenching agent is applied to the core portion (A), the shirting portion (B), or both (A, B), a gloss close to human hair can be obtained. As the quenching agent that can be used, organic particles, inorganic particles or a mixture thereof can be used. Of these, inorganic particles are more preferable.

When the inorganic particles are applied, quenching is caused by diffused reflection of the quencher itself. As the inorganic particles, barium sulfate, silicon dioxide, calcium carbonate, titanium dioxide, talc, antimony trioxide and the like can be used. However, silicon dioxide and talc are preferred because they are excellent in light extinction effect, It is silicon dioxide.

The quencher of the present invention preferably has an average particle diameter in the range of 0.01 to 3.0 mu m. If the particle diameter is less than 0.01 탆, aggregation occurs in the compounding process, and the occurrence of threading in the spinning and drawing process may increase. When the particle diameter exceeds 3.0 탆, the spinning property becomes poor. More preferably in the range of 0.01 to 1.0 mu m.

Other additives

The core part (A), the sheath part (B) or both of them (A) and (B) of the present invention may contain, in addition to the above components, a heat stabilizer, a light stabilizer, a UV stabilizer, a fluorescent agent, an antioxidant, Dyes, plasticizers, lubricants, flame retardant auxiliaries, inorganic fillers, and the like. The additives may be applied alone or in combination of two or more. As the flame retarding auxiliary agent, antimony oxide may preferably be applied. Antimony trioxide is suitable as the antimony oxide. When antimony trioxide is applied, the content of the flame retardant incorporated in the resin can be reduced by increasing the flame retardancy and drip resistance. As the dye, carbon black can be preferably applied. The antimony oxide suitable for the present invention has an average particle diameter of 0.1 to 1.0 mu m. When the antimony oxide particle diameter is less than 0.1 탆, the dispersibility may become poor. On the other hand, if the antimony oxide particle diameter exceeds 1.0 탆, too many protrusions are formed on the surface of the fiber, so that not only the sliding property of the fiber surface is deteriorated but also the combability is poor.

Of artificial hair fibers  Produce

The present invention also provides a method of making artificial hair fibers. The manufacturing method includes a step of melt-spinning the pellet (I) for core and the pellet (II) for sheath into a sheath-core spinneret. In the artificial hair fibers, the core pellets (I) are 50 to 80 wt%, and the pellets (II) for shaving are 20 to 50 wt%.

The core pellet can be produced by melt extruding a resin composition containing a polycarbonate resin, a polyarylate resin, a mixture thereof, and a flame retardant into a conventional extruder. As the extruder, a twin-screw extruder is preferably applied.

Wherein the composition of the core pellets (I) comprises 14 to 20 parts by weight of a flame retardant per 100 parts by weight of the polycarbonate resin, and the flame retardant is 6 to 14 parts by weight per 100 parts by weight of the mixture of the polycarbonate resin and the polyarylate resin. By weight.

The pellets (II) for shirting can be produced by melt extruding a resin composition comprising a polyamide resin, a polyester resin or a mixture thereof and a flame retardant into a conventional extruder. As the extruder, a twin-screw extruder is preferably applied. The composition of the pellets (II) for shaving may contain 10 to 30 parts by weight of a flame retardant per 100 parts by weight of a polyamide resin, a polyester resin or a mixture thereof.

It is possible to further include additives such as carbon black, inorganic fine particles and antioxidants in the pellets (I) for core and the pellets (II) for pellets or both (I and II). Further, by adding a small amount of the inorganic fine particles, the luster of the artificial hair can be controlled.

The core pellets (I) and the pellets for the sheath (II) may each be further subjected to a drying step prior to spinning. The drying is usually carried out in a nitrogen atmosphere at 80 to 180 ° C, preferably 80 to 130 ° C for 3 to 10 hours, preferably 4 to 8 hours to obtain a water content of 500 ppm or less, preferably 0 to 100 ppm do.

The dried pellets are put into a composite radiator capable of forming a sheath-core and melt-spun to produce an undrawn yarn. In the spinning process, an emulsion containing a lubricant, a surfactant, and an antistatic agent is applied. The prepared non-drawn filament is heat-treated in the drawing apparatus while being stretched 1.5 to 3 times.

The shape of the spinneret is not particularly limited, and for example, circular, peanut-shaped, star-shaped, elliptical, hollow elliptical or the like can be used. The metering part temperature of the extruder for melting the core part (A) resin is 260 to 330 캜, the metering part temperature of the extruder for melting the resin of the sheath part (B) is 250 to 320 캜, 290-350 占 폚. At this time, a heating barrel can be installed in the lower portion of the spinneret. The discharged filament yarn can be cooled and passed through a bath containing the emulsion. The unstretched yarn thus produced may further include a step of stretching in a stretching apparatus. The stretching device may be, but is not necessarily limited to, a heating drum stretching device. The stretching magnification may be determined by measuring the physical properties of the fibers that have passed through the heat treatment process, and is usually stretched at a stretching ratio of 1.5 to 3 times.

 The stretched stretched yarn may further include a heat treatment in a heat treatment apparatus heated to a range of 150 to 280 ° C. The heat treatment method and the heat treatment apparatus can be applied by a conventional method and can be easily carried out by a person having ordinary skill in the art to which the present invention belongs.

 The artificial hair fibers of the present invention obtained by the heat treatment as described above may have a fineness of 30 to 100 denier.

The artificial hair fibers of the present invention can form curls freely and have almost no deformation even at a hair ironing unit (hair iron) at 130 to 200 ° C, so that they have excellent heat resistance, excellent flame retardancy, And is also very suitable for use as a wig because of its clear color.

wig

The present invention provides a wig using the artificial hair fibers. The wig can be manufactured by a conventional method, and can be easily manufactured by a person having ordinary skill in the art to which the present invention belongs. The wig may be manufactured by using artificial hair fibers singly or in various wigs such as wigs and extensions applied by mixing artificial hair fibers and human hair.

The present invention may be better understood by the following examples, which are for the purpose of illustrating the invention and are not intended to limit the scope of protection defined by the appended claims.

Example

The specifications of each component used in Examples and Comparative Examples of the present invention are as follows.

(A)

Polycarbonate resin: Bayer Material Co., Ltd.

                      APEC 2097 (glass transition temperature: 203 占 폚)

                      APEC 1803 (glass transition temperature 180 DEG C)

                      APEC 1695 (glass transition temperature 160 캜)

                      Samyang Hsung Co., Ltd. 3017IR (glass transition temperature 130 ° C)

Polyarylate resin: UniCasa U-100

Bromine flame retardant: ICL company 2400H

(B)

Polyamide resin PA66: BASF Ultramid A34 01

Polyester resin: Eastman Chemical PCTA 13319

Bromine flame retardant: ICL company 2400H

Example  One

Each of the components of the core part and the sheath part shown in Table 1 below was melted and mixed to prepare core pellets (I) and pellets (II) for shirps. The dried pellets (I) and (II) were dried at a water content of 100 ppm or less, respectively, and then the dried pellets were put into a sheath part and a core part extruder, respectively. At this time, the sheath / core ratio can be controlled by the number of gear pump revolutions. The temperature of the shoe cylinder was 250 to 310 ° C, and the temperature of the core cylinder was 270 to 330 ° C. The spinneret has a circular cross section with 150 holes arranged in a circle, and the single yarn fineness of the undrawn yarn was 180 denier. The untitled gentleman attached spinning emulsion before winding. The non-drawn filament thus produced was stretched by the speed difference of the heated roller. The stretching ratio was given as 300%. Passed through heated rollers and subjected to heat treatment at 150 to 250 ° C to impart thermal stability to the fibers.

Example  2 to 4

Except that the content ranges of each component shown in Table 1 below.

Example  5 to 7

The procedure of Example 1 was repeated except that the composition of the core portion (A) was changed to the conditions of Example 3, and the sheath-core ratio was changed as shown in Table 2.

Example  8 to 10

Except that the content ranges of each component shown in Table 3 below were used.

Comparative Example  1 and 2

The procedure of Example 1 was repeated except that the weight ratio of resin to core (A) was changed to the ratio shown in Table 1.

Comparative Example  3 and 4

The procedure of Example 1 was repeated except that the composition of the core portion (A) was changed to the conditions of Example 3, and the sheath-core ratio was changed as shown in Table 2.

Tables 1, 2 and 3 below show the respective components in terms of% by weight based on 100% by weight of the total of (A) and (B).

Example Comparative Example One 2 3 4 One 2 Schwab PCT 24 24 24 - 50 - PA66 - - - 22 - - Bromine flame retardant 6 6 6 8 - - Sheesbu Total 30 30 30 30 50 - Core portion APEC 2097 20 30 40 40 - 50 APEC 1803 15 10 10 10 - 20 APEC 1695 10 10 - - - 10 3017IR 15 15 10 10 - 20 Bromine flame retardant 10 10 10 10 - 10 PCT - - - - 50 - Core subtotal 70 70 70 70 50 100

                                                   (Unit: wt%)

Example Comparative Example 5 6 7 3 4 Sheesbu (PCT) 20 30 40 10 60 Core portion 80 70 60 90 40

                                                (Unit: wt%)

Example 8 9 10 Schwab PCT 24 24 24 Bromine flame retardant 6 6 6 Sheesbu Total 30 30 30 Core portion PAR 30 40 50 APEC 1803 20 10 - APEC 1695 - - - 3017IR 15 15 15 Bromine flame retardant 5 5 5 Sheesbu Total 70 70 70

                                          (Unit: wt%)

The properties of the prepared specimens were measured in the following manner. The results are shown in Table 4 below.

Property evaluation method

(1) Curl forming property: Artificial hair of 40,000 denier (160 strands x 50 denier x 5 strands) was cut into a length of 30 cm, fixed to a clamp, heated at 130, 140, 160, 180, The curled state after curling was evaluated by winding the electric iron 5 times five times, holding it for 5 seconds, and pulling out the ironing iron. The curl forming property was evaluated based on the curl formation length of the artificial hair fibers prepared with 100 parts by weight of natural hair.

(⊚: when the curling length of the synthetic hair fibers produced by 100 parts by weight of natural hair is the same as the curling length of the natural hair: ◯: a state in which the curling length is 1 to 2 cm shorter than the reference △: )

(2) Curl retentivity: Artificial hair of 40,000 denier (160 strands x 50 denier x 5 strands) was cut into a length of 30 cm, and wound on an electric iron heated at 180 ° C for 5 seconds And the curled state immediately after formation was evaluated. The curl formation was evaluated by measuring the curl after 24 hours.

(?: When the length is less than 1 cm,?: 2 to 3 cm stretched?: 4 to 5 cm stretched 占: 6 cm or more)

(3) Heat resistance: Artificial hair of 40,000 denier (160 strands × 50 denier × 5 strands) of concentrated fiber bundles was sandwiched between specially-made household electric hair irons (Recca products) heated to 230 ° C. and heated for 5 seconds State of fiber deformation due to shrinkage, deformation due to fusion, and the like were visually determined. When there was no deformation after heat treatment, it was judged that heat resistance was good, and when deformation occurred, it was judged to be defective.

(4) Solvent resistance: Natural hair and artificial hair were judged to be solubility for the wig bond used for wig production. The attaching device was attached by a roller which attaches the bond at the final stage of the double needle sewing machine used for manufacturing the wig. Ten minutes after the bond treatment, the fibers were pulled by hand and evaluated for dissolution.

(O: no damage at all) B: slight damage X: dissolved and broken

(5) Dripping resistance: The dripping phenomenon of the melted resin in the process of contacting the fiber bundle with the flame was measured. The number of molten resin drips dripping was measured. The fiber bundles gathered at 160 yarns were suspended vertically, and the number of drips was measured while burning 100 mm by approaching the 30 mm flame.

 (?: Drip number 0,?: Number of drips 1 to 2,?: Number of drips 3 to 4, 占: number of drips exceeded 4 times)

(6) Flame Retardancy: 160 pieces of yarn were cut into 15 cm, and flame adjusted to 2 cm in length was contacted for 5 seconds. Then, flame was removed and the digestion time was measured.

 (◎: the time required for decontamination is less than 1 second, ○: the time required for decontamination is less than 3 seconds, △: the decontamination time is less than 5 seconds, ×:

(7) Tactile sensation: Artificial hair of 40,000 denier (160 strands x 50 denier x 5 strands) of bundled sword bundle was evaluated while rubbing with a 30 cm hot air dryer at 60 캜 for 2 hours with a thumb dried and stopped. The criterion of evaluation was 4 stages based on human.

(Excellent: Smooth feeling is very good: Good: Smooth feeling is slight: Fair: Smooth feeling is poor: Smooth feeling is very poor.

(8) Strength and elongation

 And the tensile strength measurement equipment model LRX plus type manufactured by LLOYD Instruments. 160 filaments were focused and made into a measurement sample. 1KN, and the strength and elongation of the sample were measured while the sample was stretched at a gripping distance of 200 mm and a tensile speed of 200 mm / min. The same test was repeated five times to obtain an average value. The unit of strength is g / d, and the unit of elongation is%.

(9) Fairness: The yarn count was determined by measuring the number of yarn occurrences for 5 hours in the spinning process.

(?: Yarn occurrence 0, O: yarn occurrence 1,?: Yarn occurrence 2-3?, Yarn occurrence 4 or more).

Example Comparative Example One 2 3 4 5 6 7 8 9 10 One 2 3 4 Curl formation 130 ℃ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ × ◎ ◎ × 150 ℃ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ × ◎ ◎ △ 170 ℃ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ × ◎ ◎ △ 190 ℃ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ × ◎ ◎ △ Curl maintenance ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Heat resistance ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ◎ × △ ○ Solvent resistance ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ × △ ○ Melting dripping property ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ △ △ ○ Flammability ○ ○ ○ ○ ○ ○ ○ ◎ ◎ ◎ ○ △ ◎ ◎ touch ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ △ △ ○ burglar 1.5 1.3 1.2 1.4 1.1 1.4 1.5 1.2 1.3 1.3 1.8 1.1 1.3 1.6 Shindo 62 55 60 66 58 63 53 60 65 58 45 61 57 47 Fairness ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ △ × △

From the results of Table 4, it can be seen that the artificial hair fibers of Examples 1 to 10 according to the present invention are excellent in curling property in which curling is formed simultaneously with heating at a hair curling iron temperature of 130 to 200 캜, And so on. On the other hand, Comparative Example 1, which is made of polycarbonate copolymer of Comparative Examples 1 and 2, which is excellent in heat resistance but poor in curl forming property and different in glass transition temperature, is excellent in curl forming property, It is found that the composition and other physical properties are deteriorated. Comparative Example 3, which is outside the content range of the sheath portion and the core portion defined in the present invention, was excellent in curl forming property but deteriorated in heat resistance, solvent resistance, processability and other physical properties, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
1: Core part (A) 2: Sheath part (B)

Claims (9)

Core structure comprising a core part (A) and a sheath part (B) surrounding the core part (A), wherein the core part (A) comprises two or more polycarbonate resins having different glass transition temperatures, (B) comprises a polyamide resin, a polyester resin or a mixture thereof, the core portion (A) is 50 to 80% by weight, the sheath portion (B) Is 20 to 50% by weight, and further comprises 6 to 14 parts by weight of a flame retardant per 100 parts by weight of the core part (A), and at least one kind of the polycarbonate resin is a unit represented by the following formula Wherein the polyarylate resin is a polyarylate resin containing a unit represented by the following formula (2): " (1) "

[Chemical Formula 1]

(2)

In the above formula (1), Z and J represent the degree of copolymerization, and in the formula (2), n is a degree of polymerization ranging from 17 to 100.
delete delete The artificial hair fiber according to claim 1, wherein the polyester resin is a polyalkylene terephthalate resin.
The artificial hair fiber according to claim 1, wherein the polyester resin is a polycyclohexanedimethylene terephthalate (PCT) resin.
The artificial hair fiber according to claim 1, wherein the polyamide resin is PA 6 or PA 66.
The artificial hair fiber according to any one of claims 1 and 4 to 6, wherein the fineness of the artificial hair fibers is 30 to 100 denier.
A wig produced using the artificial hair fibers according to claim 7.
50 to 80% by weight of a core pellet (I) containing a mixture of a polycarbonate resin and a polyarylate resin and 6 to 14 parts by weight of a flame retardant based on 100 parts by weight of the mixture and a polyamide resin, And 20 to 50% by weight of a pellet (II) for a shoe comprising a flame retardant is melt-spun into a sheet-core spinneret, and the polycarbonate resin is a polycarbonate comprising units expressed by the following formula Wherein the polyarylate resin is a polyarylate resin comprising a unit represented by the following formula (2): < EMI ID =

[Chemical Formula 1]

(2)

In the above formula (1), Z and J represent the degree of copolymerization, and in the formula (2), n is a degree of polymerization ranging from 17 to 100.

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