JP2004300638A - Microcapsule for textile treatment and textile structure having microcapsule attached thereto - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a textile structure having microcapsules attached to the structure and having antibacterial property, moisture-keeping property and skin-barrierness and exerting low stimulation to the skin. <P>SOLUTION: The microcapsule for the treatment of textile contains a component containing cineole. The invention further relates to a textile structure having the microcapsules attached to the structure, etc. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００６７】
表１より、静菌活性値は洗濯１０回で基準値２．２以上を維持している。すなわち、洗濯によるマイクロカプセルの脱離は少なく繊維との密着性が高いことから、洗濯耐久性に優れていることが分かる。
【００６８】
【発明の効果】
本発明のユーカリオイルを内包するマイクロカプセルを付着した繊維構造物は、抗菌効果、保湿効果、皮膚のバリア効果を有し、かつ皮膚に対して刺激性が低いという特徴を有している。また、肌に対する風合いも良い。また、本発明の繊維構造物は、マイクロカプセルの壁膜やバインダーに、有害なホルムアルデヒドを発生する恐れのあるホルマリン系樹脂を全く採用していないため、皮膚への刺激性がより低減されているという特徴をも有している。
【００６９】
さらに、マイクロカプセルがバインダーにより強固に繊維に固着されているため、耐久性（特に洗濯耐久性）が高く上記の効果が長期間維持発揮される。
【図面の簡単な説明】
【図１】実験例１の洗濯０回と洗濯３０回目の繊維構造物の電子顕微鏡写真である。
【図２】実験例２の培養皮膚による皮膚刺激性試験の結果を示すグラフである。
【図３】実験例３の角質水分量試験の結果を示すグラフである。
【図４】実験例３の経皮水分蒸散量試験の結果を示すグラフである。
【図５】実験例３の 皮膚表面の観察結果を示す写真である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a microcapsule for treating fibers and a fiber structure to which the microcapsules are attached.
[0002]
[Prior art]
Eucalyptus oil is an essential oil obtained by steam distillation of young leaves of eucalyptus, an evergreen tree of the family Myrtaceae native to Australia. Eucalyptus oil is said to have antibacterial properties, moisturizing properties, immunity regulating action, and the like, and is used in soap fragrances, room fragrances, medicines, disinfectants, and the like.
[0003]
Conventionally, efforts have been made on functional processing of fibers for the purpose of imparting properties that do not exist in the fibers themselves or eliminating defects of the fibers. For example, a fibrous structure in which microcapsules containing a substance having an action of improving the physiologically active state of the skin (such as ascorbic acids) are attached to fibers with a binder (Patent Document 1), and fats and oils containing γ-linolenic acid are used. Fibers (Patent Document 2) to which microencapsulated materials are attached have been reported. However, there is no report on a fiber structure to which microcapsules containing eucalyptus oil are attached.
[0004]
On the other hand, in recent years, the number of patients with atopic dermatitis has increased, and underwear made of natural materials and which is gentle on the skin is strongly desired. Therefore, even when a certain function is given to the fiber, the fiber that comes into direct contact with the skin, such as a fiber product or a sanitary article, needs to have low irritation to the skin. In addition, it is also required that the touch (feel) and the function imparted to the fiber (particularly, durability against washing, etc.) be effectively maintained.
[0005]
[Patent Document 1]
Japanese Patent No. 25626233 [0006]
[Patent Document 2]
JP-A-11-107163
[Problems to be solved by the invention]
An object of the present invention is to provide a fibrous structure having microcapsules, which has antibacterial properties, moisturizing properties, and skin barrier functions, and has low irritation to the skin.
[0008]
[Means for Solving the Problems]
The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, a fiber structure obtained by attaching microcapsules containing eucalyptus oil containing cineol can solve the above-mentioned problems. Which was further developed to complete the present invention:
That is, the present invention provides the following technology.
[0009]
Item 1. A microcapsule for treating fibers, containing a component containing cineol.
[0010]
Item 2 The microcapsule according to Item 1, wherein the cineole is at least one selected from the group consisting of 1,8-cineole and 1,4-cineole.
[0011]
Item 3. The microcapsule according to Item 1, wherein the component containing cineol is eucalyptus oil.
[0012]
Item 4 The microcapsules according to Items 1 to 3, wherein the microcapsules are composed of a wall film mainly composed of a urethane-based resin.
[0013]
Item 5 The average particle diameter of the microcapsules is about 1 to 100 μm, the thickness of the wall film is about 0.1 to 50 μm, and the content of the wall film is about 10 to 90% by weight based on the total amount of the microcapsules. A microcapsule according to any one of claims 1 to 4.
[0014]
Item 6. The method for producing microcapsules according to Item 1, wherein a component containing cineol and a diisocyanate compound are emulsified in an aqueous solution, a polyhydric alcohol is added thereto, and the mixture is heated and stirred.
[0015]
Item 7 A fiber treating agent comprising the microcapsule according to any one of Items 1 to 5.
[0016]
Item 8 A fiber treatment agent comprising the microcapsule according to any one of Items 1 to 5 and a binder.
[0017]
Item 9: A fiber structure comprising a fiber treatment microcapsule containing a cineol-containing component attached thereto with a binder.
[0018]
Item 10 The fiber structure according to Item 9, wherein the binder is a silicone resin.
[0019]
Item 11 The fiber structure according to Item 9 or 10, wherein the content of the binder is about 0.1 to 5 times by weight based on the total amount of the microcapsules.
[0020]
Item 12. A method for producing a fibrous structure, comprising attaching a fiber treatment microcapsule containing a component containing cineol to a fiber with a binder.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention improves the antibacterial effect, the moisturizing effect, the skin barrier effect, etc., and realizes the reduction of skin irritation by adding microcapsules containing eucalyptus oil containing cineol to the fiber structure. What you are trying to do.
[0022]
Microcapsule for fiber treatment The microcapsule for fiber treatment of the present invention is characterized by containing cineol. Cineol is a bicyclic monoterpene corresponding to the intramolecular ether of terpine, and there are two kinds of 1,8-cineole and 1,4-cineole. That is, cineol includes any one of these two types, or both. Particularly preferred is 1,8-cineole.
[0023]
Eucalyptus oil and rosemary are examples of components containing cineol. Eucalyptus oil only needs to contain at least 10% by weight of cineol, preferably at least 70% by weight, more preferably about 80 to 90% by weight. Particularly, those containing 1,8-cineole at 70% by weight or more are preferable.
[0024]
As the efficacy of eucalyptus oil, antibacterial properties, moisturizing properties, immunity regulating actions, anti-inflammatory actions, skin barrier function improving actions, etc., which are caused by cineole as a main component, are known. It is considered that the mechanism of action of these effects is due to an increase in the amount of ceramide and an accompanying increase in skin moisturizing ability, thereby enhancing the effect of recovering skin immune functions. The fibrous structure of the present invention is based on a completely new concept of applying eucalyptus oil having such excellent properties to fibers.
[0025]
The wall film of the microcapsule of the present invention is characterized in that it has a urethane-based resin as a main component and does not contain any formalin-based resin (melamine-formalin-based resin, urea-formalin-based resin, etc.) that generates harmful formaldehyde. Have. Specific examples of the urethane-based resin include a urethane resin composed of a diisocyanate compound and a polyhydric alcohol.
[0026]
The content of the urethane resin in the wall film of the microcapsule is usually 10 to 90% by weight, and preferably 30 to 70% by weight. The wall film may contain another resin as long as it does not adversely affect the object of the present invention. For example, it may contain an acrylic resin (a crosslinking agent such as methylenebisacrylamide or a divinyl compound may be used in combination), a vinyl chloride resin, or a cellulose resin.
[0027]
As a method for forming microcapsules of a component containing cineol, an interfacial polycondensation method is effective, but is not particularly limited. Examples of the interfacial polycondensation method include a method in which a cineol-containing component and a diisocyanate compound are emulsified in water, and then a polyhydric alcohol is added thereto, followed by heating and stirring.
[0028]
Here, examples of the diisocyanate compound include compounds such as hexamethylene diisocyanate. An emulsifier may be used if necessary.Examples of the emulsifier include known gums such as gum arabic, sodium polystyrene sulfonate, sodium polyacrylate, acrylic acid copolymer, maleic acid copolymer, polyvinyl alcohol, and polyethylene glycol. Can be used. Examples of the polyhydric alcohol include diols, specifically, compounds such as ethylene glycol and propylene glycol. Among them, preferred combinations include those using hexamethylene diisocyanate as the diisocyanate compound and ethylene glycol as the polyhydric alcohol.
[0029]
The heating and stirring may be performed at, for example, about 40 to 80 ° C. for about 1 to 20 hours. The stirring speed may be appropriately selected from, for example, about 50 to 1000 rpm according to the reaction scale and the concentration.
[0030]
The size of the target microcapsule, the content of the wall film in the microcapsule, the thickness of the wall film, and the like are determined by appropriately selecting the amount of the raw material and the reaction conditions (temperature, stirring speed, concentration, etc.). Be prepared.
[0031]
Next, the resulting microcapsules are filtered and dried to obtain the microcapsules of the present invention. For these, a known method can be used.
[0032]
The content of cineol in the microcapsules of the present invention is usually about 10 to 90% by weight, preferably about 30 to 70% by weight, based on the total amount of the microcapsules.
[0033]
In addition, inside the microcapsule of the present invention, in addition to the component containing cineol, an antioxidant, a preservative, a fragrance, a fragrance, a stabilizer, a volatilization inhibitor, if necessary, as long as the effects of the present invention are not hindered. And the like can be blended in a usual amount.
[0034]
The average particle size of the microcapsules of the present invention is preferably smaller than the diameter of a single fiber when attached to fibers, usually about 1 to 100 μm, and preferably about 5 to 20 μm. The average particle diameter can be measured by a known method. The thickness of the wall film of the microcapsule is about 0.1 to 50 μm, and preferably about 2 to 20 μm. The content of the wall film of the microcapsules is usually about 10 to 90% by weight, preferably about 30 to 70% by weight, based on the total amount of the microcapsules. Within the above range, the effects of the present invention are suitably exhibited.
[0035]
It is preferable that these microcapsules have strength enough to withstand the pressure, friction or washing during fiber processing and to be gradually broken or cracked when worn or intentionally worn after being attached to the product. The strength of the microcapsule of the present invention can be appropriately selected depending on the application site of the fiber to be treated, but is usually about 1 g / cm ^{2 to 2} kg / cm ² , preferably about 50 g / cm ^{2 to 1} kg / cm ^2. It is.
Fiber structure to which microcapsules for fiber treatment are adhered The fiber structure of the present invention comprises a microcapsule containing a component containing cineol and a fiber treatment agent containing a binder, and an unprocessed fiber structure. Obtained by acting on
[0036]
The fiber structure referred to in the present invention may include yarns / cottons, woven and knitted fabrics, non-woven fabrics and their secondary products, natural fibers (cotton, hemp, silk, wool, etc.), and recycled fibers (viscose-rayon). Etc.), semi-synthetic fibers (acetate-rayon, etc.), synthetic fibers (polyester, nylon, acrylic, etc.), or composite fibers of these blended yarns, ply yarns, blended fibers, cross-knitted fabrics and the like. Fibers having irregularities, for example, cotton, porous fibers having macrovoids, and fibers having an affinity for the binder are advantageous from the viewpoint of adhesion to the binder. The fiber cloth may be any known one such as a woven or knitted fabric, a knitted fabric, or a nonwoven fabric. The sheet may be a known film such as a polyethylene film or a polypropylene film, or a sheet of paper including synthetic paper.
[0037]
Further, it is preferable that the fiber structure used in the present invention is subjected to a water-repellent treatment in advance so that the binder does not penetrate into the woven yarn or the cloth and harden the texture. As a result, the binder and the microcapsules mainly adhere to the surface of the cloth, and do not impair the original texture of the fibers. A known method can be used for the water repellent treatment. However, for applications that do not require water repellency, it is sufficient to simply impregnate a relatively small amount of the water repellent and then dry.
[0038]
Examples of the water repellent treatment include a method of impregnating and drying aluminum acetate and paraffin with an emulsifier obtained by adding an emulsifier and a protective colloid, and a method of impregnating and drying using an emulsion of a methylhydrogenpolysiloxane emulsion and a metal soap. There is a method of performing a heat treatment afterward.
[0039]
The fiber treating agent contains the microcapsules and the binder described above.
[0040]
The binder contained in the fiber treatment agent is not particularly limited as long as it is a known one such as a silicone type, a urethane type, a vinyl acetate type, an acrylic type, a vinyl chloride type, a resin such as a phenol type, and a paste such as a modified starch. Silicone resins that form rubbery skin are preferred in terms of durability and pressure buffering properties. The silicone resin binder has a coating effect and plays a role as an adhesive between the microcapsule containing the skin improving agent and the knitted fabric. In particular, it has excellent dispersibility in water and can be easily diluted with water. A silicon-based aqueous emulsion type, for example, a product obtained by emulsifying an organopolysiloxane as a main component with an emulsifier is preferable. This is cured by the removal of water to form a rubber-like skin having the characteristics of silicone rubber, and has a durable adhesive effect. Among these, those which can be dried and processed at 130 ° C. or lower are preferable.
[0041]
The resin binder may be a solution type or an emulsion type, but an aqueous emulsion type is preferred in terms of ease of handling and cost. For example, silicon-based resin, urethane-based resin, and vinyl acetate harden by removing water to form a rubber-like film, and thus exhibit a durable adhesive effect, and are particularly preferable. Silicon-based resin is most preferable.
[0042]
The amount of the binder used may be about 0.1 to 5 times, preferably about 0.5 to 3 times, more preferably about 1 to 2 times by weight based on the total amount of the microcapsules. With a sufficient adhesive effect. If it is less than 0.1 times, the binder effect is extremely poor, whereas if it is more than 5 times, the adhesion rate of the microcapsules hardly changes, and conversely, a problem is caused in the soft texture of the fiber or fabric. Not preferred.
[0043]
The amount of microcapsules attached to the fibrous structure can be appropriately selected depending on the use of the fibers, but is usually about 0.3 to 15% by weight, preferably about 0.1 to 15% by weight, based on the total weight of the fibers in the attached portion. It accounts for about 5 to 5% by weight. That is, if the amount of the microcapsules attached is too small, the moisturizing effect and durability are insufficient, while if it is too large, the feeling is not preferable.
[0044]
The fiber treatment agent is a range that does not adversely affect the effects of the present invention, and furthermore, in order to impart antibacterial properties and deodorant properties to the fibers to be treated, known antibacterial agents, deodorants, surfactants Etc. may be blended. Further, a softening agent may be blended in order to improve the texture of the fiber or the like to be treated. As the softening agent, for example, a silicone-based emulsion, a urethane-based emulsion, an acrylic-based emulsion, or the like can be used.
[0045]
The processing method for attaching the microcapsules to the fiber structure of the present invention is not particularly limited, and examples thereof include an exhaustion method (immersion absorption method), a pad method, a spray method, a gravure method, a knife method, and a printing method. Known coating methods can be used, and these can be used to fix the fiber treating agent to the fiber structure.
[0046]
Specific methods for fixing the microcapsules to the fibers include, for example, the following methods. Microcapsules are added to an aqueous solution containing 0.1 to 10% by weight of a binder (for example, TF3500: manufactured by Kitahiro Chemical) to prepare a 0.1 to 10% by weight microcapsule suspension. A fiber structure (for example, a 100% cotton knitted fabric after bleaching) is brought into contact with the suspension for about 0.5 to 2 seconds, and then squeezed using a padder at a squeezing rate of about 100%. Thereafter, the fabric is dried at about 50 to 120 ° C. for about 2 to 15 minutes to prepare a fabric to which the microcapsules are attached.
[0047]
ADVANTAGE OF THE INVENTION The fiber structure of this invention can improve the antibacterial effect, the moisturizing effect, the barrier effect of skin, etc., and can reduce the irritation to skin.
[0048]
In general, the skin of patients with atopic dermatitis (AD) has a markedly reduced water retention capacity, presents with a symptom called atopic dry skin, and has both skin and rash areas, compared to the age-matched healthy population. It is known that the amount of lipids in the stratum corneum and the amount of ceramide per stratum corneum are significantly reduced. When the eucalyptus oil-containing fiber structure of the present invention is worn by the above-mentioned dermatitis patient, it acts on both the ceramide generation system and the decomposition system, increases ceramide, and restores the moisturizing function and the barrier function. it can. Of course, since the eucalyptus oil-containing fiber structure of the present invention is hypoallergenic, it can be used as underwear for infants and the like.
[0049]
In addition, the fiber structure of the present invention does not have rigidity due to the water-repellent treatment of the fiber in advance, and has good texture and comfort. Further, the fiber structure of the present invention has a feature that washing durability is high.
[0050]
【Example】
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
[0051]
Example 1 (Production method of microcapsules containing eucalyptus oil)
20 g of eucalyptus oil and 10 g of hexamethylene diisocyanate were added to 64 g of a 1% aqueous solution of gum arabic, followed by stirring with a homomixer to emulsify. Next, 6 g of ethylene glycol was added, and a polycondensation reaction was carried out at 50 ° C. for 6 hours while continuing stirring with a lab stirrer at 200 rpm. The reaction solution was filtered and dried to obtain microcapsules.
[0052]
The obtained microcapsules had a particle diameter of 1 to 10 μm (average 5 μm), and the content of the wall film was 15% by weight.
Example 2 (Method for producing a fibrous structure having microcapsules fixed thereto)
A 100% cotton bleached fabric is contacted with a suspension of 1% capsules in an aqueous solution containing 1% of a binder (TF3500: manufactured by Kitahiro Chemical Co., Ltd.) for 0.5 seconds. It was squeezed at a squeezing ratio of 100%. Thereafter, the fabric was dried at 100 ° C. for 5 minutes to prepare a fabric to which the microcapsules were attached.
Experimental Example 1 (Washing durability test)
The fibrous structure obtained in Example 2 was washed according to JIS L 0217 103 method, and this was repeated 30 times. FIG. 1 shows electron micrographs of the fibrous structures at the 0th washing and the 30th washing. The electron microscope was performed using a JSM-5800LV model manufactured by JEOL Datum Co., Ltd. under the conditions of a measurement magnification of 1000 times.
[0053]
From the electron micrograph of FIG. 1, it can be seen that the microcapsules still remained on the fibers even after the 30th washing. This indicates that the fiber structure of the present invention has high washing durability, and the effect lasts for a long time.
Experimental Example 2 (Skin irritation test with cultured skin)
The cell viability of the cultured skin was measured when the processed cloth, which is the fiber structure of the present invention, was allowed to act on a three-dimensional cultured skin model “Vitrolife-Skin” manufactured by Gunze (hereinafter referred to as cultured skin) for 24 hours. The irritation of the fabric to the skin was evaluated.
[0054]
(1) Preparation of Work Cloth Sample A work cloth sample is punched out into a circle having a diameter of 7 mm, and its weight is measured.
[0055]
(2) Preparation of cultured skin A 24-well plate is prepared, and a cell culture solution is added in an amount of 250 μL per well, placed in an incubator, and kept at 37 ° C. for 0.5 hour. Thereafter, the three-dimensional cultured skin model “Vitrolife-Skin” (manufactured by Gunze Co., Ltd. (hereinafter referred to as “cultured skin”)) is set one by one in a well plate that has been kept warm, and put again in the incubator to keep it warm.
[0056]
(3) Addition of work cloth sample The work cloth sample prepared in (1) impregnated with an artificial sweat liquid three times as heavy was placed on the surface of the cultured skin prepared in (2). The cultured skin on which the work cloth sample was placed was cultured for 24 hours at 37 ° C. in 5% CO ₂ .
[0057]
(4) Staining of Live Cells of Cultured Skin The MTT solution was dispensed into a 24-well plate at 1 ml portions. At 24 hours after the culture, the work cloth sample was removed from the culture skin on which the work cloth sample was placed, and the culture skin was submerged in the MTT solution. After the cultured skin submerged in the MTT solution was cultured in an incubator at 37 ° C. for 3 hours, the stained state of the cultured skin stained with the MTT solution was photographed with a digital camera.
[0058]
After washing the cultured skin stained with the MTT solution with PBS (phosphate buffer), the center of the model was punched out. The punched sample was placed in a well plate. 10% SDS was added to the sample, and extraction was carried out by using isopropanol (containing 1/100 (volume ratio) of 4N hydrochloric acid) as an extract and shaking for 1.5 hours or overnight.
[0059]
The absorbance (wavelength 570 nm) of the extract was measured.
[0060]
MTT (3- (4,5 dimethylthiazol-2-yl) -2,5-diphenyltetrazolium bromide) is a reducing chromogenic reagent, and reacts with dehydrogenase in the mitochondria of cells to become purple. To produce formazan. The cell viability can be evaluated by measuring the formazan amount by absorbance. (5) Measurement of cell viability From the results obtained above, the cell viability was calculated by the following formula. ) = (Sample absorbance / control absorbance) × 100
FIG. 2 shows the results of the skin irritation test using the cultured skin. This shows that the fiber subjected to the eucalyptus capsule processing has a higher cell viability than the non-processed fiber, that is, has lower skin irritation.
Experimental Example 3 (Keratin moisture content test and transdermal moisture loss test)
The following test was performed to confirm the moisturizing property of the processed eucalyptus fabric on actual skin. A cylindrical work cloth sample formed on the left forearm and a cylindrical unprocessed sample formed on the right forearm were worn for 8 days, and the moisturizing properties of the skin before and after wearing were confirmed. In addition, 6 healthy persons with no abnormalities on the skin were used as monitors.
[0061]
<Measurement items>
{Circle around (1)} Keratin water content measurement (manufactured by SKICON-200 IBS Co., Ltd. Measurement conditions: temperature 20 ° C., humidity 50%)
{Circle around (2)} Measurement of transepidermal water loss (AS-TW2 type, manufactured by Skynos Co., Ltd., measurement conditions: temperature 20 ° C., humidity 50%)
(3) Observation of skin surface (VH-6200 type, manufactured by KEYENCE CORPORATION, measurement conditions: temperature 20 ° C, humidity 50%)
<Measurement method>
The inside of the left arm forearm covered with the cylindrical work cloth sample in advance and the inside of the right arm forear covered with the cylindrical unprocessed sample are marked with black magic at two locations to be measured positions.
[0062]
Under conditions of a temperature of 20 ° C. and a humidity of 50%, sensors made by SKICON-200 IBS Co., Ltd. are pressed against two measurement positions to measure the moisture content of the skin. Similarly, AS-TW2 type sensors made by Skinos Co., Ltd. are pressed against two measurement positions at a temperature of 20 ° C. and a humidity of 50%, respectively, and the amount of water evaporation of the skin is measured.
<Measurement results>
FIG. 3 shows the results of the keratin moisture content test. In all the monitors, it can be seen that the processed sample has a higher keratin water content than the non-processed sample, and the skin is moistened with water.
[0063]
FIG. 4 shows the results of the transdermal moisture loss test. In all the monitors, it can be seen that the processed sample has a lower transepidermal water loss than the unprocessed sample, and the skin is kept moist.
[0064]
The observation result of the skin surface is shown in FIG. From FIG. 5, it can be observed that when the work cloth is worn for 8 days, the texture of the skin is finer, and it is moist and moist.
Experimental Example 4 (Deodorizing effect test)
The antibacterial and deodorant effects were evaluated according to the following JAFET standards.
[0065]
<Test method> Unified test method (JIS-L-1902-98)
<Test strain> Staphylococcus aureus <Antibacterial deodorant standard>
Bacteriostatic activity value (logB / C) ≧ 2.2
A: Number of bacteria collected immediately after inoculation of unprocessed cloth (or standard cloth) B: Number of bacteria collected after 18 hours of cultivation of unprocessed cloth (or standard cloth) C: Antibacterial and deodorized cloth or bacteriostatic treatment Number of bacteria collected after cultivation of cloth for 18 hours <Durability of antibacterial and deodorant effects>
(1) Washing method: JIS L 0217 103, using JAFET standard detergent (2) Number of times: 0 times and 10 times <Test result>
The bacteriostatic activity values are shown in Table 1 below.
[0066]
[Table 1]

[0067]
From Table 1, the bacteriostatic activity value maintains the reference value of 2.2 or more after 10 washes. That is, the detachment of the microcapsules due to washing is small and the adhesion to the fiber is high, which indicates that the washing capsule has excellent washing durability.
[0068]
【The invention's effect】
The fibrous structure to which the microcapsules containing eucalyptus oil of the present invention are attached has an antibacterial effect, a moisturizing effect, a barrier effect on the skin, and a low irritation to the skin. Also, the texture for the skin is good. In addition, the fibrous structure of the present invention does not employ any formalin-based resin that may generate harmful formaldehyde in the wall film or binder of the microcapsules, so that irritation to the skin is further reduced. It also has the feature.
[0069]
Further, since the microcapsules are firmly fixed to the fibers by the binder, the durability (particularly, washing durability) is high, and the above-mentioned effects are maintained and exhibited for a long period of time.
[Brief description of the drawings]
FIG. 1 is an electron micrograph of the fibrous structure of Experiment 1 after 0 washes and 30 washes.
FIG. 2 is a graph showing the results of a skin irritation test using cultured skin in Experimental Example 2.
FIG. 3 is a graph showing the results of a horny water content test of Experimental Example 3.
FIG. 4 is a graph showing the results of a transdermal water loss test in Experimental Example 3.
FIG. 5 is a photograph showing the results of observation of the skin surface in Experimental Example 3.

Claims (12)

A microcapsule for fiber treatment that contains a component containing cineol. The microcapsule according to claim 1, wherein the cineole is at least one selected from the group consisting of 1,8-cineole and 1,4-cineole. 2. The microcapsule according to claim 1, wherein the component containing cineol is eucalyptus oil. The microcapsule according to any one of claims 1 to 3, wherein the microcapsule comprises a wall film containing a urethane resin as a main component. The average particle diameter of the microcapsules is about 1 to 100 µm, the thickness of the wall film is about 0.1 to 50 µm, and the content of the wall film is about 10 to 90% by weight based on the total amount of the microcapsules. 5. The microcapsule according to any one of 4. The method for producing microcapsules according to claim 1, wherein a component containing cineol and a diisocyanate compound are emulsified in an aqueous solution, a polyhydric alcohol is added thereto, and the mixture is heated and stirred. A fiber treatment agent comprising the microcapsule according to claim 1. A fiber treating agent comprising the microcapsules according to claim 1 and a binder. A fiber structure in which a microcapsule for fiber treatment containing a component containing cineol is attached by a binder. The fiber structure according to claim 9, wherein the binder is a silicone resin. The fibrous structure according to claim 9 or 10, wherein the content of the binder is about 0.1 to 5 times by weight based on the total amount of the microcapsules. A method for producing a fibrous structure, characterized in that a fiber treatment microcapsule containing a component containing cineol is attached to a fiber with a binder.

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