JP7267818B2 - Hair fabrics and textiles - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hair fabric and textile product that protects hair and has excellent water absorbency.

Generally, as hair care products, liquid type items such as shampoos and hair rinses for use in the bath and treatments for use in and out of the bath are known. This is because the hair is wetted and swelled so that the drug can easily penetrate inside.

The drying process is also important to keep the hair beautiful. If neglected, the cuticle, which controls the health of the hair, will be damaged and the appearance will be significantly deteriorated. (See Patent Document 1, for example).

As a hair care agent for dry hair, leave-in type treatments are generally distributed, but applying treatments increases the number of processes and makes your hands dirty, and the appropriate amount to use depends on the amount of hair. There was a problem that the usage amount was difficult to understand.

JP 2016-43223 A

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and an object thereof is to provide a hair fabric and a textile product which protect the hair and have excellent water absorbency.

As a result of intensive studies to achieve the above object, the inventors of the present invention have found that by making a fabric using yarns with a low pH, the hair will always be in a weakly acidic state that exhibits a healthy barrier function. The present inventors have found that hair care can be performed while absorbing excessive moisture by increasing the water absorbency of the fabric, and have completed the present invention through extensive studies.

Thus, according to the present invention, "a hair fabric having a pH within the range of 4.0 to 6.5 and having a water absorbency of 15 seconds or less on at least one of the front and back of the fabric,
After washing five times as specified in JIS L0217: 1995, the pH of the fabric is less than 7.0,
The polyester fiber is included in the fabric,
A third component is copolymerized with the polyester fiber and has a sulfonic acid group or a carboxyl group,
the fabric is a knitted fabric,
After covering the hair after hair coloring for 1 hour or more, the average coefficient of friction (MIU) deterioration rate (%) represented by the following formula is 40% or less,
A fabric for hair characterized by having a burst strength of 250 kPa or more as measured by JIS L1096 8.18:2010 A method, or a tear strength of 6 N or more as measured by JIS L 1096 8.17:2010 D method. . ” is provided.
However, the water absorption shall be measured by JIS L1907 7.1.3:2010 sedimentation method, and the mean coefficient of friction (MIU) deterioration rate (%) is represented by the following formula.
MIU deterioration rate (%) = 100 × ((MIU of untreated hair sample) - (MIU of treated hair sample)) / (MIU of untreated hair sample)

In addition, according to the present invention, any hair fabric selected from the group consisting of pillowcases, hair caps, hats, towels, handkerchiefs, scarves, hair bands, face masks, duvet covers, and sheets. A textile product is provided.

ADVANTAGE OF THE INVENTION According to this invention, the cloth for hair and textiles which protect hair and were excellent in water absorption are obtained.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail. The cuticle, the outermost layer of the hair, greatly affects the beauty of the appearance of the hair, and keeping the cuticle healthy leads to the health of the hair as a whole. It is known that the cuticle spoils its appearance by exfoliation by physical stimulation. The cuticle opens and closes when it swells or when the pH becomes alkaline, making it vulnerable to physical stimulation. Therefore, it is necessary to quickly remove moisture after hair dyeing, in which the cuticle tends to open, and to lower the pH of the hair, which has been alkalinized, to a weakly acidic one with a shampoo or water.

Therefore, the present invention provides a hair fabric for use in contact with hair, having a pH in the range of 4.0 to 6.5 (preferably 4.5 to 6.0), and It includes a fabric having a water absorbency of at least one of the front and back (preferably both sides) of 60 seconds or less (preferably 40 seconds or less, particularly preferably 1 to 20 seconds). However, water absorption shall be measured by JIS L1907 7.1.3:2010 sedimentation method.

By containing such a fabric, the hair fabric of the present invention can quickly remove moisture from the hair and lower the pH of the hair.

Here, it is preferable that the pH of the fabric is less than 7.0 after washing five times as specified in JIS L0217:1995. Depending on how you use it, if the effect is lost in less than 20 washes, if you use and wash every day, the effect will be lost in less than 20 days, but it takes 20 days to realize the health of your hair. The above use is preferred. Since the present invention is intended to keep the hair healthy and to suppress the accumulation of daily damage, it is difficult to realize the effect in short-term use. Therefore, it is preferable that the washing durability is 20 times or more.

Moreover, it is preferable to perform the measurement of pH with the following method. That is, the fabric is immersed in water (neutral water) of pH 7.0 at a bath ratio of 1:5 (the weight ratio of the fabric and neutral water is (fabric: neutral water) 1:5), and the temperature is 120 ° C. After the treatment for 30 minutes, the fabric is taken out, the pH of the residual liquid is measured with a commercially available pH meter, and it is preferable to use this as the pH of the fabric. In addition, a commercially available universal pH test paper is placed on the fabric, 0.05 to 0.10 cc of pH 7.0 water is dropped from above, and then the universal pH test paper is pressed against the fabric with a glass rod to perform a universal pH test. The pH of the fabric can be measured by visually judging the pH in the grayscale of the color transferred from the paper onto the fabric.

Synthetic fibers, in particular polyester fibers, may also be included in the fabric. Among synthetic fibers, polyester fibers have many types and are highly quick-drying, so they are highly versatile and preferable. Post-processing such as improvement of water absorbability and antibacterial properties may be performed by changing the cross section to an irregular shape. Furthermore, it may be made into short fibers and blended with cotton, or may be used in the form of filaments. For example, 100% cotton, which is representative of natural fibers, has high water absorbency but does not have a weakly acidic pH.

Here, the fibers forming the cloth preferably include polyester fibers as described in Japanese Patent No. 5758807, for example. In particular, it preferably contains 20% by weight or more, preferably 30% by weight or more, and more preferably 50% by weight or more of polyester fibers that are polyethylene terephthalate, polybutylene terephthalate, or polytrimethylene terephthalate. That is, the fiber is preferably a polyalkylene terephthalate-based polyester containing terephthalic acid as a main difunctional carboxylic acid component and ethylene glycol, trimethyleneterene glycol, tetramethylene glycol or the like as a main glycol component.

In addition, the fiber is a polyether ester having polybutylene terephthalate as a hard segment and polyoxyethylene glycol as a soft segment, as described in Japanese Patent No. 4202361, or a poly(butylene terephthalate) having a hard segment and poly( A polyetherester having oxytetramethylene)glycol as a soft segment may also be used. Further, the polyester may be a material-recycled or chemically-recycled polyester, or a specific phosphorus compound and titanium compound as described in JP-A-2004-270097 and JP-A-2004-211268. Polyethylene terephthalate, polylactic acid, and stereocomplex polylactic acid obtained using a monomer component obtained using biomass, that is, a substance of biological origin as a raw material, may be used.

Further, the fiber may be a polyester in which a part of the terephthalic acid component is replaced with another difunctional carboxylic acid component, and/or a polyester in which a part of the glycol component is replaced with another diol compound. may

Examples of bifunctional carboxylic acids other than terephthalic acid used at this time include isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenoxyethanedicarboxylic acid, β-hydroxyethoxybenzoic acid, p-oxybenzoic acid, and adipine. Aromatic, aliphatic and alicyclic bifunctional carboxylic acids such as acid, sebacic acid and 1,4-cyclohexanedicarboxylic acid can be mentioned.

Further, if the polyester used for the fiber contains sulfur (S), the pH of the fabric can be adjusted to the above range by acid treatment as described later, which is preferable. At that time, sulfur (S) is preferably contained in an amount of 0.03 to 1.0% by weight based on the total polyester weight. If the amount of sulfur contained in the polyester is less than the above range, the pH of the fabric may not fall within the above range even if the acid treatment described below is performed. Conversely, if the amount of sulfur contained in the polyester is larger than the above range, the strength of the fabric may be lowered when the polyester is subjected to an acid treatment as described later.

式（２）

As a method for adding sulfur (S) to the polyester, it is preferable to copolymerize an ester-forming sulfonic acid group-containing compound with the polyester. Such an ester-forming sulfonic acid group-containing compound is not particularly limited as long as it is a sulfonic acid group-containing compound having an ester-forming functional group, and an ester-forming sulfonic acid metal salt compound represented by the following general formula (1): And/or ester-forming phosphonium sulfonic acid compounds represented by the following general formula (2) are preferred.
formula (1)

formula (2)

ただし、Ｒ’は低級アルキル基またはフェニル基、ａおよびｄは１以上の整数、ｂは２以上の整数である。 In the general formula (1), A1 represents an aromatic group or an aliphatic group, preferably an aromatic hydrocarbon group having 6 to 15 carbon atoms or an aliphatic hydrocarbon group having 10 or less carbon atoms. Particularly preferred A1 is an aromatic hydrocarbon group having 6 to 12 carbon atoms, especially a benzene ring. X1 represents an ester-forming functional group, and specific examples include the following formula (3).
Formula (3)

However, R' is a lower alkyl group or a phenyl group, a and d are integers of 1 or more, and b is an integer of 2 or more.

In the general formula (1), X2 represents an ester-forming functional group which is the same as or different from X1 or a hydrogen atom, and is preferably an ester-forming functional group. M is an alkali metal or alkaline earth metal and m is a positive integer. Among them, those in which M is an alkali metal (eg, lithium, sodium, or potassium) and m is 1 are preferred.

Preferable specific examples of the ester-forming metal sulfonate compound represented by the general formula (1) include sodium 3,5-dicarbomethoxybenzenesulfonate, potassium 3,5-dicarbomethoxybenzenesulfonate, 3,5-dicarbomethoxybenzenesulfonate potassium, Lithium 5-dicarbomethoxybenzenesulfonate, Sodium 3,5-dicarboxybenzenesulfonate, Potassium 3,5-dicarboxybenzenesulfonate, Lithium 3,5-dicarboxybenzenesulfonate, 3,5-di(β -hydroxyethoxycarbonyl)benzenesulfonate, potassium 3,5-di(β-hydroxyethoxycarbonyl)benzenesulfonate, lithium 3,5-di(β-hydroxyethoxycarbonyl)benzenesulfonate, 2,6-dicarbohydrate Sodium methoxynaphthalene-4-sulfonate, potassium 2,6-dicarbomethoxynaphthalene-4-sulfonate, lithium 2,6-dicarbomethoxynaphthalene-4-sulfonate, 2,6-dicarboxynaphthalene-4-sulfone sodium acid, sodium 2,6-dicarbomethoxynaphthalene-1-sulfonate, sodium 2,6-dicarbomethoxynaphthalene-3-sulfonate, sodium 2,6-dicarbomethoxynaphthalene-4,8-disulfonate , sodium 2,6-dicarboxynaphthalene-4,8-disulfonate, sodium 2,5-bis(hydroethoxy)benzenesulfonate, and α-sodium sulfosuccinic acid. The ester-forming sulfonic acid metal salt compounds may be used alone or in combination of two or more.

In general formula (2) above, A2 represents an aromatic group or an aliphatic group, and has the same definition as A1 in general formula (1) above. X3 represents an ester-forming functional group and has the same definition as X1 in the general formula (1) above; X4 represents an ester-forming functional group that is the same as or different from X3 or a hydrogen atom; Same as the definition of X2. R1, R2, R3 and R4 represent the same or different groups selected from the group consisting of alkyl groups and aryl groups. n is a positive integer, preferably 1. Preferred specific examples of the ester-forming phosphonium sulfonic acid compound include 3,5-dicarboxybenzenesulfonic acid tetrabutylphosphonium salt, 3,5- Ethyltributylphosphonium dicarboxybenzenesulfonate, benzyltributylphosphonium 3,5-dicarboxybenzenesulfonate, phenyltributylphosphonium 3,5-dicarboxybenzenesulfonate, tetraphenylphosphonium 3,5-dicarboxybenzenesulfonate salt, 3,5-dicarboxybenzenesulfonic acid butyltriphenylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid benzyltriphenylphosphonium salt, 3,5-dicarboxybenzenesulfonic acid tetrabutylphosphonium salt, 3,5- Ethyltributylphosphonium dicarboxybenzenesulfonate, benzyltributylphosphonium 3,5-dicarboxybenzenesulfonate, phenyltributylphosphonium 3,5-dicarboxybenzenesulfonate, tetraphenylphosphonium 3,5-dicarboxybenzenesulfonate salt, ethyltriphenylphosphonium 3,5-dicarboxybenzenesulfonate, butyltriphenylphosphonium 3,5-dicarboxybenzenesulfonate, benzyltriphenylphosphonium 3,5-dicarboxybenzenesulfonate, 3-carboxy Benzenesulfonic acid tetrabutylphosphonium salt, 3-carboxybenzenesulfonic acid tetraphenylphosphonium salt, 3-carbomethoxybenzenesulfonic acid tetrabutylphosphonium salt, 3-carbomethoxybenzenesulfonic acid tetraphenylphosphonium salt, 3,5-di(β - hydroxyethoxycarbonyl)benzenesulfonic acid tetrabutylphosphonium salt, 3,5-di(β-hydroxyethoxycarbonyl)benzenesulfonic acid tetraphenylphosphonium salt, 3-(β-hydroxyethoxycarbonyl)benzenesulfonic acid tetrabutylphosphonium salt, 3-(β-hydroxyethoxycarbonyl)benzenesulfonic acid tetraphenylphosphonium salt, 4-hydroxyethoxybenzenesulfonic acid tetrabutylphosphonium salt, 2,6-dicarboxynaphthalene-4-sulfonic acid tetrabutylphosphonium salt, α-tetrabutyl Phosphonium sulfosuccinic acid and the like can be mentioned. The ester-forming phosphonium sulfonic acid salts may be used alone or in combination of two or more.

The copolymer polyester polymer may optionally contain a micropore-forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, and a matting agent, as long as the objects of the present invention are not impaired. It may contain one or more of an agent, a coloring agent, a hygroscopic agent, and inorganic fine particles.

In order to copolymerize the ester-forming sulfonic acid group-containing compound with the polyester, it may be added at any stage before the completion of the polyester synthesis described above, preferably at any stage before the initial stage of the second-stage reaction. Just do it. When two or more of them are used together, they may be added at any time, and they may be added separately, or they may be mixed in advance and added at the same time.

Further, the polyester may be a normal pressure cationic dyeable polyester as described in JP-A-2009-161693.

The fiber form of the polyester fiber is not particularly limited, but in order to increase the surface area of the fiber and obtain excellent antibacterial properties and deodorant properties, it is preferable that the polyester fiber is a long fiber (multifilament yarn) rather than a short fiber (spun yarn). preferable. In particular, the polyester fiber is a core-sheath type composite fiber, the copolymerized polyester is arranged in the sheath, and polyethylene terephthalate or the like that is not copolymerized with the third component is arranged in the core, or the polyester fiber is a side-by-side type. It is preferable to use a composite fiber in which the above-mentioned copolymerized polyester is arranged on one side and polyethylene terephthalate or the like, which is not copolymerized with the third component, is arranged on the other side.

In the polyester fiber, the cross-sectional shape of the single fiber is not particularly limited, but rather than a round cross section, it is triangular, flat, flat with three or more constrictions, round hollow, triangular hollow, square hollow, H type, W type. , and a finned cross section (that is, a cross section other than a circular cross section) are preferable because the surface area of the monofilament is increased. Further, such polyester fibers may be subjected to ordinary air processing, false twist crimp processing, and twisting. In particular, it is preferable to subject the polyester fibers to false twisting and crimping in order to increase the bulk of the polyester fibers and increase the surface area of the fibers to obtain excellent antibacterial properties and deodorizing properties. In this case, the crimp ratio of the false twisted crimped yarn is preferably 1% or more. Further, as described in International Publication No. 2008/001920 pamphlet, it is obtained by combining a false twisted crimped yarn having torque in the S direction and a false twisted crimped yarn having torque in the Z direction. It may be a low torque composite yarn.

In addition, in the polyester fiber, the single fiber fineness and the number of filaments are set so that the surface area of the fiber is increased to increase the contact area with the hair, and in order to obtain an excellent hair barrier function and glossy feeling, the single fiber fineness is The smaller the number, the better, and the larger the number of filaments, the better. The single fiber fineness is preferably 5.0 dtex or less (more preferably 0.0001 to 2.5 dtex, still more preferably 0.001 to 1.5 dtex). Also, the number of filaments is preferably 30 to 50000 (more preferably 30 to 200). In addition, ultrafine fibers as described in JP-B-7-63438 and ultrafine fibers as described in JP-A-2009-024278 may be used. The total fineness of the polyester fiber (the product of the single fiber fineness and the number of filaments) is preferably 10 to 200 dtex in order to obtain comfortable wearing when in contact with hair.

The fabric having the above pH can be produced, for example, by the following production method. First, a fabric is obtained using the above-described polyester fiber obtained by copolymerizing an ester-forming metal sulfonate compound and/or an ester-forming phosphonium sulfonate compound.

In this case, the fabric structure may be a woven fabric or a knitted fabric. For example, in the weave structure of the woven fabric, the Mihara weave such as plain weave, twill weave, and satin weave; Vertical pile fabrics such as vertical velvet, towels and velor, and horizontal pile fabrics such as velveteen, horizontal velvet, velvet, and callus are exemplified. The woven fabrics having these weave structures can be woven by ordinary methods using ordinary looms such as rapier looms and air jet looms. The number of layers is not particularly limited, and it may be a single layer or a woven fabric having a multi-layer structure of two or more layers. In addition, the tensile strength of the woven fabric (measured by JIS L1096 8-17:2010 D method) is preferably 6N or more, more preferably 8N or more. If it is less than 6N, there is a possibility that the practical strength will not be reached.

Further, the type of knitted fabric may be a weft knitted fabric or a warp knitted fabric. Preferable examples of the weft knitting structure include flat knitting, rubber knitting, double-sided knitting, pearl knitting, tuck knitting, float knitting, hem knitting, lace knitting, pile knitting, and cover knitting. Preferred examples include single denby knitting, single atlas knitting, double cord knitting, half tricot knitting, fleece knitting, and jacquard knitting. Knitting can be performed by a normal method using a normal knitting machine such as a circular knitting machine, a flat knitting machine, a tricot knitting machine, a Raschel knitting machine, or the like. The number of layers is not particularly limited, and it may be a single layer or a knitted fabric having a multilayer structure of two or more layers.

Among them, pile fabric is preferable. In particular, it is preferable that the pile length is 2.0 mm or more (more preferably 2.0 to 5.0 mm). This is because the longer the pile, the greater the area of contact with the hair, and the easier it is for the functions of water absorption and pH control to be exhibited.

Then, the fabric is subjected to acid treatment. As a method for subjecting the fabric to acid treatment, for example, the fabric is placed in a bath prepared to have a pH of 5.0 or less (preferably 2.0 to 5.0) with an acid component such as acetic acid, succinic acid, or malic acid. It is preferable to immerse in water at a temperature of 70° C. or higher (preferably 80 to 130° C., particularly preferably 90 to 130° C.) for 20 to 40 minutes, but the temperature may not be applied. Therefore, it may be applied in a dyeing tank after the dyeing process, or may be applied in the padding process. A yarn which itself exhibits weak acidity may be woven. For example, a polyester, nylon, or rayon thread into which a weakly acidic component is kneaded may be used.

Since the present invention has the above constitution, the synergistic effect of weak acidity and water retention of the fabric allows the hair to always exhibit a healthy barrier function, and hair care can be performed while absorbing excess moisture.

Here, in the fabric, after covering the hair after hair coloring for 1 hour or more (preferably 2 hours or more), the average coefficient of friction (MIU) deterioration rate (%) represented by the following formula is 40% or less (more than preferably 30% or less). If the MIU deterioration rate is higher than 40%%, there is a possibility that damage may be easily felt by touch.
MIU deterioration rate (%) = 100 × ((MIU of untreated hair sample) - (MIU of treated hair sample)) / (MIU of untreated hair sample)

(process)
As a treatment agent for hair color, agent 1 consisting of alkali color containing oxidation dye and agent 2 containing 6% by weight hydrogen peroxide and adjusted to pH 3.0 were mixed at a ratio of 1:1. , as a treatment agent for hair color.

Next, a hair color treatment agent is applied to a test human black hair tress (manufactured by Beaulux Co., Ltd.) that has not been chemically treated, and left at 35° C. for 30 minutes. Then, it was rinsed with purified water for 1 minute to prepare damaged hair. After that, the hair samples are treated with a conventional shampoo and a cationic surfactant. After that, the fabric and a load of 200 g are placed on the hair and allowed to stand for 1 hour.

Normally, hair is damaged by hair coloring, so the cuticle peels off or opens, increasing the average coefficient of friction (the rate of deterioration increases). be done.

Further, when the fabric is a knitted fabric, the bursting strength measured by JIS L1096 8.18:2010 A method is preferably 250 kPa or more (more preferably 300 to 500 kPa). If it is less than 250 kPa, there is a possibility that the practical strength will not be reached. Furthermore, when the fabric is a woven fabric, it preferably has a tear strength of 6 N or more, more preferably 10 N or more, as measured by the JIS L 1096 8-17:2010 D method. If it is less than 6N, it may break after several washings.

Next, the textile product of the present invention is made by using the fabric for hair described above, and is selected from the group consisting of pillow covers, hair caps, hats, towels, handkerchiefs, scarves, hair bands, face masks, duvet covers, and sheets. Any textile product that Since such a textile product uses the fabric described above, it protects the hair and is excellent in water absorption.

Needless to say, such a fiber product may be composed only of the above-mentioned fabric for hair, or may partially use the above-mentioned fabric for hair.

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples. However, the present invention is not limited by these. Each measured value is a value measured by the following method.
(1) pH of fabric
The sample was immersed in pH 7.0 (neutral water) at a bath ratio of 1:5 (the weight ratio of the sample to neutral water was 1:5 (sample: neutral water) and treated at a temperature of 120°C for 30 minutes. After that, the sample was taken out, and the pH of the remaining liquid was measured with a commercially available pH meter (manufactured by Atago Co., Ltd., model DPH-2), and this was taken as the pH of the hair fabric.In addition, before washing (L0) and JIS L0217: Measured after 5 washes as specified in the 1995 method (L20).

(2) Preparation of hair As a hair coloring treatment agent, agent 1 consisting of an alkaline color containing an oxidation dye and agent 2 containing 6% by weight hydrogen peroxide and adjusted to pH 3.0 were mixed into 1:1. They were mixed at a ratio of 1 to prepare a hair color treatment agent.
Next, a hair color treatment agent was applied to a test human black hair tress (manufactured by Beaulux Co., Ltd.) that had not been chemically treated, and left at 35° C. for 30 minutes. Then, it was rinsed with purified water for 1 minute to prepare damaged hair. After that, the hair samples were treated with a conventional shampoo and a cationic surfactant. After that, a cloth and a load of 200 g were placed on the hair, and the hair was allowed to stand for 1 hour, and the frictional surface frictional resistance value and gloss evaluation described later were performed.

(3) Hair surface friction resistance value A hair sample (hair bundle) was measured using a friction tester (KES-SE, manufactured by Kato Tech Co., Ltd.), and the average friction coefficient (MIU ). It can be said that when the numerical value of the average friction coefficient (MIU) is small, the surface friction is small, the cuticle is closed, and the possibility of cuticle detachment is reduced. The MIU deterioration rate was calculated by the following formula. The lower the MIU deterioration rate, the closer the state is to before hair coloring (imparting damage), and the less damage there is.
MIU deterioration rate (%) = 100 × ((MIU of untreated hair sample) - (MIU of treated hair sample)) / (MIU of untreated hair sample)

(4) Gloss Evaluation Evaluation was made in the following three grades based on sensory evaluation by three testers. Grade 3: Same as before treatment. Grade 2: Slightly deteriorated compared to before treatment. Grade 1: Worse than before treatment.

(5) Water absorption evaluation JIS L1907 7.1.3:2010 The pile surface and the back surface of the fabric were brought into contact with the water surface by the sedimentation method, and the sedimentation time was measured.

(6) Measurement of Bursting Strength The bursting strength of the fabric was measured according to JIS L1096 8.18:2010 A method.

(7) Measurement of pile length The fibers that make up the pile part of the pile fabric are set vertically and a caliper is used to measure the length from the root to the tip of the fibers that make up the pile part at 10 points. and the average value was taken as the pile length.

[Example 1]
Using a 28-gauge circular knitting machine used for knitting textile fabrics for clothing, polyethylene terephthalate false-twisted and crimped by copolymerizing 1.5 mol % of an ester-reactive sulfonic acid group-containing compound and imparting a carboxyl group. Using only yarn (total fineness 84 dtex/72 fil), a pile fabric having a pile length of 2.7 mm and having a single-sided pile knitting structure was produced with a circular knitting machine.

Then, the fabric was subjected to an acid treatment by immersing it in a bath adjusted to pH 3.9 with acetic acid at 110°C for 30 minutes, followed by drying at 150°C for 60 seconds. The resulting fabric had a pH of 5.7 and a pH of 5.5 even after 20 washes.

The obtained fabric was subjected to the hair test described in (2) above. The deterioration rate of the average coefficient of friction (MIU) measured by the hair surface frictional resistance value was 10%, and the glossy feeling of the hair surface was equivalent to that before treatment (grade 3). Table 1 shows the evaluation results.

[Example 2]
In Example 1, polyethylene terephthalate false-twisted crimped yarn (total fineness 84 dtex/72 fil) and cotton (cotton The same procedure was performed except that the blend ratio of the count 40/−) was changed to 80:20. The deterioration rate of the average coefficient of friction (MIU) measured by the hair surface frictional resistance value was 25%, and the glossy feeling of the hair surface was equivalent to that before treatment (grade 3). Table 1 shows the evaluation results.

[Comparative Example 1]
Example 2 was the same as Example 1, except that the acid treatment was not performed. The obtained fabric-type cosmetic had a neutral pH (both L0 and L20 had a pH of 7.4), and the rate of deterioration of the average coefficient of friction (MIU) and the improvement of the luster of the hair surface were insufficient. Table 1 shows the evaluation results.

[Comparative Example 2]
The procedure was the same as in Example 2, except that only cotton (cotton count 40/−) was used in Example 2. The obtained fabric-type cosmetic had a neutral pH (both L0 and L20 had a pH of 7.2), and the rate of deterioration of the average coefficient of friction (MIU) and the improvement in glossiness of the hair surface were insufficient. Evaluation results are shown in Table 1

INDUSTRIAL APPLICABILITY According to the present invention, a hair fabric and a fiber product that protect hair and have excellent water absorbency are provided, and their industrial value is extremely high.

Claims (3)

A hair fabric having a pH in the range of 4.0 to 6.5 and a water absorbency of at least one of the front and back of the fabric of 15 seconds or less,
After washing five times as specified in JIS L0217: 1995, the pH of the fabric is less than 7.0,
The polyester fiber is included in the fabric,
A third component is copolymerized with the polyester fiber and has a sulfonic acid group or a carboxyl group,
the fabric is a knitted fabric,
After covering the hair after hair coloring for 1 hour or more, the average coefficient of friction (MIU) deterioration rate (%) represented by the following formula is 40% or less,
A fabric for hair characterized by having a burst strength of 250 kPa or more as measured by JIS L1096 8.18:2010 A method, or a tear strength of 6 N or more as measured by JIS L 1096 8.17:2010 D method. .
However, the water absorption shall be measured by JIS L1907 7.1.3:2010 sedimentation method, and the mean coefficient of friction (MIU) deterioration rate (%) is represented by the following formula.
MIU deterioration rate (%) = 100 × ((MIU of untreated hair sample) - (MIU of treated hair sample)) / (MIU of untreated hair sample) A hair fabric according to claim 1 , wherein the fabric is a pile fabric. 3. Any one selected from the group consisting of pillowcases, hair caps, hats, towels, handkerchiefs, scarves, hair bands, face masks, duvet covers, and sheets, using the hair fabric according to claim 1 or 2. Fiber products.