Patent Application
20220369747
One or more embodiments of the present invention relate to fibers for artificial hair that can be used as an alternative to human hair, hair ornament products including the same, and a method for producing the same. Specifically, one or more embodiments of the present invention relate to fibers for artificial hair having a high combing property and a gloss close to human hair, hair ornament products including the same, and a method for producing the same.
Conventionally, human hair has been used for hair ornament products such as hairpieces, hair wigs, hair extensions, hair bands, and doll hair, but it becomes difficult to obtain human hair recently. Therefore, human hair is being replaced with fibers for artificial hair using synthetic fibers, including acrylonitrile-based fibers such as modacrylic fibers, polyvinyl chloride-based fibers, and polyester-based fibers. However, the synthetic fibers for artificial hair have a strong surface gloss and look unnatural as a whole when used in hair ornament products, particularly in hair products such as hair wigs and hairpieces, and hence various methods have been studied to improve the gloss of the synthetic fibers for artificial hair. For example, Patent Document 1 has developed polyester-based fibers containing a brominated epoxy-based flame retardant and an acidic phosphorus-based compound. In Patent Document 1, by adding the acidic phosphorus-based compound to a polyester-based resin, the viscosity of the polyester resin is reduced and the dispersibility of the brominated epoxy flame retardant blended in the polyester-based resin is decreased, causing the surface layer of the fibers after spinning to express roughness and consequently reducing the gloss of the fibers.
The water content of the fibers for artificial hair of Patent Document 1 varies widely because the acidic phosphorus-based compound is highly hygroscopic, varying the quality of resultant fibers and making it difficult to control the gloss reduction. Further, the unevenness on the fiber surface is difficult to control, which sometimes results in fibers with a poor combing property. Thus, there is still room for improvement.
One or more embodiments of the present invention provide fibers for artificial hair having an excellent combing property and a gloss close to human hair, hair ornament products including the same, and a method for producing the same.
One or more embodiments of the present invention relate to a fiber for artificial hair containing resin particles adhering to the fiber surface. An amount of the resin particles adhering to the fiber surface is 0.3% omf or more and 1.1% omf or less, and an average particle diameter of the resin particles is 1 μm or more and 20 μm or less.
One or more embodiments of the present invention relate to a method for producing the fiber for artificial hair, including applying a resin emulsion to the fiber surface. An average particle diameter of the resin emulsion is 350 nm or more, and an application amount of the resin emulsion on a solid basis is 0.3% omf or more and 1.1% omf or less.
One or more embodiments of the present invention relate to a hair ornament product containing the fiber for artificial hair.
One or more embodiments of the present invention provide fibers for artificial hair having an excellent combing property and a gloss close to human hair and hair ornament products including the same.
The production method of one or more embodiments of the present invention enables production of fibers for artificial hair having an excellent combing property and a gloss close to human hair.
The present inventors have conducted earnest studies. As a result, it was found that adhesion of a specific amount of resin particles having a specific particle diameter to the surface of fibers for artificial hair improves the combing property while reducing the gloss of the fiber surface. The reason for this is considered to be that the resin particles having a specific particle diameter present on the fiber surface easily create an appropriate unevenness on the fiber surface, reducing the gloss without deteriorating the combing property and allowing the fibers for artificial hair to have a gloss close to the human hair. Especially, application of a resin emulsion having a specific particle diameter to the surface of fibers for artificial hair enables the resin particles to easily adhere to the fiber surface, and the resin adhering as aggregate particles having a predetermined particle diameter creates an appropriate unevenness on the fiber surface, reducing the gloss without deteriorating the combing property and allowing the fibers to have a gloss close to the human hair.
<Resin Particles>
In one or more embodiments of the present invention, the resin particles adhere to the surface of the fibers for artificial hair in an amount of 0.3% omf (on the mass of fiber) or more and 1.1% omf or less. The adhesion amount of the resin particles may be 0.35% omf or more and 1.0% omf or less, or 0.4% omf or more and 0.9% omf or less. If the adhesion amount of the resin particles is less than 0.3% omf, the amount of the resin adhering to the fiber surface is small, resulting in an insufficient gloss-reducing effect. If the adhesion amount of the resin particles is more than 1.1% omf, the amount of the resin adhering to the fiber surface is excessive, deteriorating the touch and the combing property.
In one or more embodiments of the present invention, the amount of the resin particles adhering to the surface of the fibers for artificial hair may be determined as follows, or may be calculated based on the amount of the resin emulsion applied to the surface of the fibers for artificial hair described later.
<Adhesion Amount of Resin Particles>
35 mL of a mixed liquid of cyclohexane and ethanol at a volume ratio of 1:1 was used as an extraction liquid. 2.0 g of fibers was immersed in the extraction liquid to extract the resin adhering to the fiber surface. The extracted liquid is evaporated to dryness, and the weight of the remaining component is taken as the amount of the resin particles adhering to the fibers.
The average particle diameter of the resin particles on the surface of the fibers for artificial hair is 1 μm or more and 20 μm or less. The average particle diameter of the resin particles may be 1.5 μm or more and 15 μm or less, or 2 μm or more and 10 μm or less. If the average particle diameter of the resin particles is less than 1 μm, it is difficult to create unevenness on the fiber surface, resulting in an insufficient gloss-reducing effect. If the average particle diameter of the resin particles exceeds 20 μm, the resin particles are too large, deteriorating the touch and the combing property.
In one or more embodiments of the present invention, the average particle diameter of the resin particles on the surface of the fibers for artificial hair may be determined as follows.
<Average Particle Diameter of Resin Particles>
A fiber surface magnified by 1000 times with a scanning electron microscope was photographed, and the diameters of ten resin particles observed in the micrograph were measured and averaged to determine the average particle diameter of the resin particles.
The resin particles on the surface of the fibers for artificial hair may be solid at room temperature. It is considered that resin particles that are liquid at room temperature are difficult to create an appropriate unevenness on the fiber surface, thus not exhibiting an effect of irregularly reflecting light and being difficult to reduce the gloss. The room temperature in the present disclosure refers to temperatures ranging from 10° C. or higher and 30° C. or lower.
The resin particles may contain at least one resin selected from the group consisting of polyurethane-based resin and polyamide-based resin from the viewpoint of increasing the gloss-reducing effect. Examples of the polyurethane-based resin include, but are not particularly limited to, aliphatic polyurethane and aromatic polyurethane. Examples of the polyamide-based resin include, but are not particularly limited to, polyamide elastomers and polymers obtained by copolymerizing polyamide with another component.
The resin particles may contain other kinds of resins in addition to the polyurethane-based resin and the polyamide-based resin to the extent that they do not impair the gloss property of the fiber surface. Examples of the other kinds of resins include polyoxyalkyl and dimethylsiloxane. The adhesion amount of the other kinds of resins may be 0.05% omf or more and 0.8% omf or less.
<Fibers for Artificial Hair>
The fibers for artificial hair are not particularly limited, and examples thereof include polyester-based fibers, polyvinyl chloride-based fibers, polyamide-based fibers, polyacrylic-based fibers, acrylonitrile-based fibers, and polyphenylene sulfide-based fibers.
The polyester-based fibers are fibers formed from a polyester-based resin composition. Typically, the polyester-based fibers for artificial hair can be produced by melt spinning of the polyester-based resin composition. The polyester-based resin composition is normally melt-kneaded before melt spinning. The polyester-based resin composition may contain, in addition to the polyester-based resin, one or more additives selected from the group consisting of a flame retardant, a flame retardant aid, a lubricant, a dulling agent, a pigment for coloring, etc., as appropriate.
The polyamide-based fibers are fibers formed from a polyamide-based resin composition. The polyamide-based resin composition may contain, in addition to the polyamide-based resin, one or more additives selected from the group consisting of a flame retardant, a flame retardant aid, a lubricant, a dulling agent, a pigment for coloring, etc., as appropriate.
The polyvinyl chloride-based fibers are fibers formed from a polyvinyl chloride composition. The polyvinyl chloride composition may contain, in addition to the polyvinyl chloride, one or more additives selected from the group consisting of a plasticizer, a flame retardant aid, a lubricant, a dulling agent, a pigment for coloring, etc., as appropriate.
The acrylonitrile-based fibers refer to polyacrylonitrile fibers and modacrylic fibers. The polyacrylonitrile fibers are fibers made from a polyacrylonitrile resin containing acrylonitrile in an amount of 85 wt % (% by weight) or more and 100 wt % or less and other components in an amount of 15 wt % or less. The modacrylic fibers are fibers made from a modacrylic resin containing acrylonitrile in an amount of 35 wt % or more and less than 85 wt % and other components in an amount of more than 15 wt % and 65 wt % or less. The polyacrylonitrile fibers can be formed from a polyacrylonitrile resin composition. The polyacrylonitrile resin composition may contain, in addition to the polyacrylonitrile resin, one or more additives selected from the group consisting of a flame retardant, a flame retardant aid, a dulling agent, a dye, a pigment, etc., as appropriate. The modacrylic fibers can be formed from a modacrylic resin composition. The modacrylic resin composition may contain, in addition to the modacrylic resin, one or more additives selected from the group consisting of a flame retardant, a flame retardant aid, a dulling agent, a dye, a pigment, etc., as appropriate.
The polyphenylene sulfide-based fibers are fibers formed from a polyphenylene sulfide-based resin composition. The polyphenylene sulfide-based resin composition may contain, in addition to the polyphenylene sulfide-based resin, one or more additives selected from the group consisting of a plasticizer, a flame retardant aid, a lubricant, a dulling agent, a pigment for coloring, etc., as appropriate.
The fibers for artificial hair may be non-crimped, raw thread-like fibers. The fibers for artificial hair have a single fiber fineness of preferably 10 to 100 dtex, more preferably 20 to 90 dtex, and further preferably 35 to 80 dtex from the viewpoint of being suitable as artificial hair.
The fibers for artificial hair may have any cross-sectional shape, examples thereof include a circular shape, an elliptical shape, an irregular shape such as a horseshoe shape, a C shape, and a Y shape.
<Spinning Method>
The fibers for artificial hair can be produced by a conventionally known method. The polyester-based fibers and the polyvinyl chloride-based fibers are usually produced by melt spinning. In the case of producing the fibers for artificial hair using a thermoplastic resin composition such as a polyester-based resin composition, the thermoplastic resin composition is melt-kneaded by any of various conventional kneaders, pelletized, and melt-spun. The extruded yarns may be cooled in a water bath containing cooling water to control the fineness. The temperature and the length of a heating cylinder, the temperature and the amount of cooling air to be applied, the temperature of the cooling water bath, the cooling time, and the winding speed can be adjusted appropriately according to the polymer discharge rate and the number of nozzle holes. For example, in the case of using the polyester-based resin composition, the composition is melt-spun under the temperatures of the extruder, gear pump, nozzle, etc., of 250° C. or higher and 300° C. or lower, and the extruded yarns passed through the heating cylinder are cooled to the temperature at or below the glass transition point of the polyester-based resin, and wound up at a speed of 50 m/min or more and 5000 m/min or less to obtain extruded yarns (undrawn yarns).
The extruded yarns (undrawn yarns) may be hot-drawn. The drawing may be either a two-step method or a direct spinning-drawing method. In the two-step method, the extruded yarns are wound once and then drawn. In the direct spinning-drawing method, the undrawn yarns are continuously drawn without being wound. The hot drawing is either a single-stage drawing or a multi-stage drawing that includes two or more stages. Examples of the heating device for hot drawing include a heating roller, a heating plate, a steam jet apparatus, and a hot water bath, and these may be appropriately used in combination. If the fibers for artificial hair are spun-dyed, the fibers can be used as they are. If the fibers for artificial hair are not spun-dyed, they can be dyed. The pigment, dye, aid, etc., used for dyeing may have weather resistance and flame retardancy.
The modacrylic fibers can be produced by a conventionally known method. The modacrylic fibers can be normally obtained by wet-spinning a spinning solution in which a modacrylic resin is dissolved in an organic solvent. Examples of the organic solvent include dimethyl sulfoxide (DMSO), dimethylacetamide (DMAc), and N,N-dimethylformamide (DMF). The wet spinning may include a coagulation step, a water-washing step, and a drying step. The wet spinning may also include a bath drawing step before or after the water-washing step. An oil application step before the drying step may also be performed. A drawing step and a heat relaxation treatment step after the drying step may also be performed.
The fibers for artificial hair encompasses all the fibers for artificial hair including polyester-based fibers, polyamide-based fibers, polyvinyl chloride-based fibers, acrylonitrile-based fibers, and polyphenylene sulfide fibers. The fibers for artificial hair may contain various kinds of additives, such as a heat resistant agent, a light stabilizer, a fluorescer, an antioxidant, an antistat, a pigment, a plasticizer, and a lubricant, as necessary. Spun-dyed fibers can be obtained by causing a pigment to be contained in the fibers. The touch and the texture of the fibers may be adjusted to be closer to the human hair using oils such as a fiber surface treatment agent and a softener. The fiber surface treatment agent and the softener may be mixed and applied together with a gloss-reducing resin emulsion, or they may be applied separately.
<Treatment with Resin Emulsion>
By applying the resin emulsion to the surface of the fibers for artificial hair, the resin particles adhere to the surface of the fibers for artificial hair.
In the present disclosure, the resin emulsion refers to a dispersion solution in which resin is dispersed in water using an emulsifier or the like. It is considered that by applying a resin in an emulsion state to the fibers, the emulsion resin particles easily adhere to the fiber surface rather than solely applying resin particles, and the emulsion resin particles aggregated on the fiber surface create unevenness on the fiber surface, thus imparting a gloss close to human hair to the fiber surface.
The resin emulsion has an average particle diameter of 350 nm or more. If the average particle diameter of the resin emulsion is less than 350 nm, it is considered that the resin emulsion particles do not aggregate on the fiber surface and form a uniform film on the fiber surface, lowering the effect of irregularly reflecting light and reducing the gloss of the fiber surface. The average particle diameter of the resin emulsion may be 400 nm or more and 1000 nm or less, or 500 nm or more and 900 nm or less. The average particle diameter of the resin emulsion refers to the average particle diameter of the resin particles dispersed in the emulsion. The method for measuring the average particle diameter is not particularly limited and may be dynamic scattering.
In the resin emulsion, resin forms an emulsion with water as a solvent, and the resin particles from which water has been removed through evaporation or the like may be solid at room temperature. If the resin particles are liquid at room temperature, it is considered that the resin emulsion is more likely to be uniformly applied to the fiber surface and is less likely to aggregate on the fiber surface, thus not exhibiting an effect of irregularly reflecting light and being difficult to reduce the gloss.
The resin emulsion may be, but is not particularly limited to, a polyurethane-based resin emulsion containing a polyurethane-based resin, or a polyamide-based resin emulsion containing a polyamide-based resin from the viewpoint that these resin particles are solid at room temperature and easily create an appropriate unevenness on the fiber surface.
Examples of the polyurethane-based resin include, but are not particularly limited to, aliphatic polyurethane and aromatic polyurethane.
Examples of the polyamide-based resin include, but are not particularly limited to, polyamide elastomers and polymers obtained by copolymerizing polyamide with another component.
The resin emulsion may contain other kinds of resins in addition to the polyurethane-based resin and the polyamide-based resin to the extent that they do not impair the gloss property of the fiber surface.
The resin emulsion may be prepared by a known method. Exemplary methods thereof include an aggregation method of adding an emulsifier or the like to a solution in a state in which resin is uniformly dissolved so as to disperse emulsion particles; a dispersion method of finely dispersing droplets of emulsion particles by stirring or the like; and an emulsion polymerization method of performing a polymerization reaction under the presence of an emulsifier to form emulsion particles simultaneously with polymerization. As the emulsifier, a cationic, anionic, or nonionic surfactant may be used appropriately according to the properties of the resin.
The viscosity of the resin emulsion is not particularly limited, and for example, from the viewpoint of evenly applying the resin emulsion to the fiber surface, the viscosity at 30° C. may be 0.1 mPa·s or more and 1000 mPa·s or less, 50 mPa·s or more and 900 mPa·s or less, or 100 mPa·s or more and 800 mPa·s or less. The viscosity in the present disclosure refers to a value measured by a B-type viscometer.
The pH of the resin emulsion may range from 4 or more and 9 or less, from the viewpoint of minimizing damage on the fiber surface and preventing aggregation of other surface treatment agents.
The resin emulsion may be a commercially available resin emulsion. For example, a commercially available resin emulsion may be used as it is, or may be appropriately diluted with water.
One or more embodiments of the present invention may use two or more kinds of resin emulsions. For example, two or more kinds of resin emulsions may be premixed and applied to the fibers, or resin emulsions may be individually and sequentially applied to the fibers. The resin emulsion may include additives such as a thickener within the range that they do not impair the physical properties of the fibers.
The step of applying the resin emulsion to the fiber surface is not particularly limited and may use the same method as any of various techniques pursuant to oil application methods for the fibers for artificial hair. For example, the step may use any of the following methods: bringing the fibers into contact with a roller whose surface contains the resin emulsion or a solution prepared by diluting the resin emulsion with water; dropping onto the fibers the resin emulsion or the solution prepared by diluting the resin emulsion with water; immersing the fibers in the resin emulsion or the solution prepared by diluting the resin emulsion with water.
The application amount of the resin emulsion on a solid basis is 0.3% omf or more and 1.1% omf or less. At this amount, the resin emulsion as the resin particles having an average particle diameter of 1 μm or more and 20 μm or less easily adheres to the fiber surface, thus exhibiting the gloss-reducing effect while keeping a high combing property. The application amount of the resin emulsion on a solid basis may be 0.35% omf or more and 1.0% omf or less or 0.4% omf or more and 0.9% omf or less.
After application of the resin emulsion to the fiber surface, drying may be performed. The drying conditions are not particularly limited and may be appropriately determined according to the types of the fibers and the resin emulsion. For example, the drying temperature may be 80° C. or higher and 180° C. or lower, and the drying time is 0.5 minutes or more and 15 minutes or less.
<Hair Ornament Product>
In one or more embodiments of the present invention, the fibers for artificial hair can be used singly as artificial hair. Alternatively, the fibers for artificial hair can be used as artificial hair products in combination with other fiber materials for artificial hair or natural fibers such as human hair and animal hair.
The hair ornament products formed using the fibers for artificial hair of one or more embodiments of the present invention have a natural gloss in use. The hair ornament products are not particularly limited, and examples thereof include hair wigs, hairpieces, weaving hair, hair extensions, braided hair, hair accessories, and doll hair.
Hereinafter, one or more embodiments of the present invention will be described in more detail by way of examples. However, the following examples are not intended to limit one or more embodiments of the present invention.
The following measurement and evaluation methods were used in the examples and the comparative examples.
<Average Particle Diameter of Resin Emulsion>
The average particle diameter of the resin emulsion was determined according to dynamic light scattering with ELSZ-1000 manufactured by OTSUKA ELECTRONICS CO., LTD., using an aqueous solution prepared by diluting the resin emulsion with water to the solid concentration of 1 wt %.
<Viscosity of Resin Emulsion>
The viscosity of the resin emulsion at 30° C. was measured with a digital viscometer DV2T manufacture by EKO INSTRUMENTS CO., LTD.
<pH of Resin Emulsion>
The pH of a solution prepared by diluting the resin emulsion tenfold with water was measured with a pH meter manufacture by HORIBA, Ltd.
<Adhesion Amount of Resin Particles>
An adhesion amount of the solid of the resin emulsion was defined as an adhesion amount of the resin particles on the fiber surface.
<Average Particle Diameter of Resin Particles>
The average particle diameter of the resin particles was determined by observing the fiber surface with a scanning electron microscope (JCM-6000 manufactured by JEOL Ltd.) at 1000× magnification, measuring the diameters of ten resin particles observed in the fiber surface with length measuring software, and averaging the measured diameters.
<Gloss>
The gloss was determined visually under sunlight using a 30 cm-long filament tow having a total fineness of 100000 dtex based on the following criteria.
A: The gloss is equivalent to that of human hair.
B: The gloss is almost equivalent to that of human hair.
C: The gloss is unnatural due to the difference from that of human hair.
<Combing Property>
The combing property was determined by bundling 2 g of 300 mm-long fibers for artificial hair and combing the fiber bundle to evaluate the resistance and the tangle of the fibers.
A: The fibers for artificial hair are smoothly combed through to the end without tangle.
B: The fibers for artificial hair slightly get tangled with a comb but are combed through to the end.
C: The fibers for artificial hair get tangled with a comb and cannot be combed through to the end.
Each raw material was dried to the water content of 100 ppm or less. 100 parts by weight of a polyester-based resin (polyethylene terephthalate, A-12 manufactured by EASTWEST CHEMICAL PRIVATE LIMITED), 20 parts by weight of a brominated epoxy flame retardant (SR-T20000 manufactured by SAKAMOTO YAKUHIN KOGYO CO., LTD.), 2 parts by weight of sodium antimonate (SAA manufactured by NIHON SEIKO CO., LTD.), and 0.3 parts by weight of a dispersant (Wax Composite G431L manufactured by Clariant (Japan) K.K.) were dry-blended. The obtained polyester-based resin composition was fed to a twin-screw extruder (trade name “TEX44” manufactured by The Japan Steel Works, Ltd.), melt-kneaded at a barrel temperature of 270° C., and pelletized. The pellets were dried to the water content of 100 ppm or less. The dry pellets were fed to a melt spinning machine (trade name “SV30” manufactured by SHINKO MACHINERY Co., Ltd.), and the molten polymer was extruded through a spinneret with cocoon-shaped holes in cross section (flat ratio; 1.4:1) at a barrel temperature of 270° C., air-cooled with cooling air at 20° C., and wound up at 100 m/minute to obtain undrawn yarns. The undrawn yarns were drawn to 3.1 times with a heating roller at 75° C., heat-treated with a heating roller at 205° C., and wound up at 30 m/minute to obtain polyester-based fibers (multifilaments) for artificial hair having a single fiber fineness of about 60 dtex.
A modacrylic resin containing 46 wt % of acrylonitrile, 52.0 wt % of vinyl chloride, and 2.0 wt % of styrenesulfonic acid was extruded through a spinning nozzle (hole diameter, 0.3 mm; the number of holes, 1250) into a coagulation bath (20° C.) containing a 62 wt % DMSO aqueous solution for coagulation, and the resultant filaments were drawn to 3 times in a drawing bath (80° C.) containing a 50 wt % DMSO aqueous solution. After water washing, the modacrylic fibers were immersed for 3 to 5 seconds in an oil bath (60° C.) into which a mixture containing an oil (a fatty acid ester-based oil and a polyoxyethylene-based surfactant) and 0.5 parts by weight of dimethyl sulfone, added per 100 parts by weight of the oil, was introduced, so that the modacrylic fibers were impregnate with the mixture of the oil and dimethyl sulfone. The fibers were then dried at 140° C., drawn to two times, and subjected to a 20% relaxation treatment at 160° C. to obtain modacrylic fibers having a single fiber fineness of about 46 dtex.
1.4 parts by weight of a vinyl chloride-vinyl acetate copolymer (trade name “K1F” manufactured by KANEKA CORPORATION), 0.9 parts by weight of a plasticizer, 1.1 parts by weight of a heat stabilizer, 2.93 parts by weight of a processing aid, and 0.88 parts by weight of a lubricant were added to 100 parts by weight of a vinyl chloride homopolymer (trade name “S-1001” manufactured by KANEKA CORPORATION), and they were mixed and stirred with a Henschel mixer to obtain a polyvinyl chloride compound. The compound was introduced into a hopper of a single-screw extruder (bore diameter: 40 mm) and extruded for melt spinning at a cylinder temperature of 170° C. and a nozzle temperature of 180±15° C. The shape of the nozzle holes was a cocoon. The extruded filaments were heat-treated in a heating cylinder (330° C. atmosphere) located under the nozzle for about 0.5 to 1.5 seconds. The undrawn yarns after heat treatment were wounded around a bobbin by a take-up roller. Then, the undrawn yarns were drawn to about two to four times the original length through a hot air circulation box adjusted at 110° C. Thereafter, the drawn yarns were subjected to a continuous 38% relaxation treatment in the hot air circulation box adjusted at 110° C., and the multifilaments were wound up to obtain polyvinyl chloride-based fibers (single fiber fineness, about 72 dtex).
The polyester-based fibers obtained in Production Example 1 were immersed in a polyurethane-based resin emulsion containing a polyurethane-based resin and having an average particle diameter, a viscosity, and a pH as indicated in Table 1, and thereafter dewatered to adjust the application amount of the resin emulsion on a solid basis to 0.4% omf to produce fibers for artificial hair on which 0.4% omf of the polyurethane-based resin particles adhered.
Fibers for artificial hair of Example 2 were produced in the same manner as in Example 1 except that the application amount of the resin emulsion on a solid basis was changed to 0.6% omf so as to adhere 0.6% omf of the polyurethane-based resin particles to the fiber surface.
Fibers for artificial hair of Example 3 were produced in the same manner as in Example 1 except for the use of a polyamide-based resin emulsion containing a polyamide-based resin and having an average particle diameter, a viscosity, and a pH as indicated in Table 1.
Fibers for artificial hair of Example 4 were produced in the same manner as in Example 3 except that the application amount of the resin emulsion on a solid basis was changed to 0.6% omf so as to adhere 0.6% omf of the polyamide-based resin particles to the fiber surface.
Fibers for artificial hair of Example 5 were produced in the same manner as in Example 1 except for the use of the modacrylic fibers obtained in Production Example 2.
Fibers for artificial hair of Example 6 were produced in the same manner as in Example 3 except for the use of the modacrylic fibers obtained in Production Example 2.
Fibers for artificial hair of Example 7 were produced in the same manner as in Example 1 except for the use of the polyvinyl chloride-based fibers obtained in Production Example 3.
Fibers for artificial hair of Example 8 were produced in the same manner as in Example 3 except for the use of the polyvinyl chloride-based fibers obtained in Production Example 3.
Fibers for artificial hair of Comparative Example 1 were produced in the same manner as in Example 1 except for the use of a polyester-based resin emulsion containing a polyester-based resin and having an average particle diameter, a viscosity, and a pH as indicated in Table 1.
Fibers for artificial hair of Comparative Example 2 were produced in the same manner as in Example 1 except for the use of a polyurethane-based resin emulsion containing a polyurethane-based resin and having an average particle diameter, a viscosity, and a pH as indicated in Table 1.
Fibers for artificial hair of Comparative Example 3 were produced in the same manner as in Example 1 except for the use of a silicone-based resin emulsion containing a silicone-based resin and having an average particle diameter, a viscosity, and a pH as indicated in Table 1.
Fibers for artificial hair of Comparative Example 4 were produced in the same manner as in Example 1 except for the use of an alumina suspension in place of the resin emulsion.
Fibers for artificial hair of Comparative Example 5 were produced in the same manner as in Example 1 except for the use of a silica suspension in place of the resin emulsion.
Fibers for artificial hair of Comparative Example 6 were produced in the same manner as in Example 1 except that the application amount of the resin emulsion on a solid basis was changed to 0.2% omf so as to adhere 0.2% omf of the polyurethane-based resin particles to the fiber surface.
Fibers for artificial hair of Comparative Example 7 were produced in the same manner as in Example 1 except that the application amount of the resin emulsion on a solid basis was changed to 1.2% omf so as to adhere 1.2% omf of the polyurethane-based resin particles to the fiber surface.
Fibers for artificial hair of Comparative Examples 8 were produced in the same manner as in Comparative Example 1 except for the use of the modacrylic fibers of Production Example 2.
Fibers for artificial hair of Comparative Examples 9 were produced in the same manner as in Comparative Example 7 except for the use of the modacrylic fibers of Production Example 2.
Fibers for artificial hair of Comparative Examples 10 were produced in the same manner as in Comparative Example 1 except for the use of the polyvinyl chloride-based fibers of Production Example 3.
Fibers for artificial hair of Comparative Examples 11 were produced in the same manner as in Comparative Example 7 except for the use of the polyvinyl chloride-based fibers of Production Example 3.
The gloss and the combing property of the fibers for artificial hair of the examples and the comparative examples were evaluated as described above. Table 1 below shows the results.
On the other hand, in Comparative Examples 1 to 3 using the resin particles of a small particle diameter, the resin particles adhered in such a manner as to cover the fiber surface, and a clear unevenness was not observed, resulting in a high gloss peculiar to fibers for artificial fibers. In Comparative Examples 4 and 5, the inorganic particles that had been dispersed in the suspension adhered to the fiber surface, resulting in a coarse touch and a poor appearance and a poor combing property. In Comparative Example 6, the amount of the particles adhering to the fiber surface was too little, resulting in an insufficient gloss-reducing effect. In Comparative Example 7, the amount of the resin particles adhering to the fiber surface was excessive, resulting in a poor combing property.
Although not particularly limited, one or more embodiments of the present invention may include one or more of the following embodiments, for example.
[1] A fiber for artificial hair containing resin particles adhering to the fiber surface,
Although the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments may be devised without departing from the scope of the present disclosure. Accordingly, the scope of the invention should be limited only by the attached claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2020-047581 | Mar 2020 | JP | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/JP2021/000243 | Jan 2021 | US |
| Child | 17882176 | US |
