JP7128076B2 - Textile products with astaxanthin - Google Patents

Description

TECHNICAL FIELD The present invention relates to an astaxanthin-containing fiber product that is easy to produce, releases astaxanthin slowly over a long period of time, and allows astaxanthin to be ingested on a daily basis by being worn.

Astaxanthin is one of the xanthophylls, is contained in some algae, krill, shrimp, sea bream, salmon and the like, and is an orange pigment that is widely distributed in nature.
Astaxanthin is known to have a high antioxidant effect, and is said to have an effect of improving ultraviolet rays and stress, an effect of improving muscle damage and diseases, and the like. In recent years, supplements, health foods, skin care products, etc. containing astaxanthin have been put on the market.

Attempts have been made to attach such astaxanthin to textile products so that astaxanthin can be ingested on a daily basis to exert stress-relieving effects and the like.
In order to take astaxanthin on a daily basis and exert stress-relieving effects, it is necessary to release astaxanthin from fiber products over a long period of time. However, since astaxanthin has a low affinity for textile products, it has been considered difficult to adsorb and fill textiles with ordinary processing methods. For example, in the method of immersing or padding a textile product in a treatment solution containing astaxanthin and then drying it, there is a problem that the astaxanthin is lost after only a few washings. On the other hand, when astaxanthin is chemically bound to fibers, the effect of astaxanthin is lost, or no astaxanthin is released from the fibers at all.

Therefore, as described in Patent Document 1, for example, a special method such as dyeing and fixing astaxanthin to hollow fibers of olefin fibers or nylon fibers in a carbon dioxide medium at 80 ° C. or less and a pressure of 25 MPa or less has been attempted. It has been However, such a special method has the problem that the types of textile products that can be used are limited, and the dyeing process is complicated and expensive.

Japanese Patent No. 6044734

SUMMARY OF THE INVENTION In view of the above-mentioned current situation, the object of the present invention is to provide an astaxanthin-containing fiber product that is easy to manufacture, releases astaxanthin gradually over a long period of time, and allows daily ingestion of astaxanthin by wearing the product. .

The present invention is an astaxanthin-attached textile product comprising a textile product containing polyurethane and astaxanthin attached to the textile product.
The present invention will be described in detail below.

As a result of intensive studies, the present inventors have surprisingly found that astaxanthin can be easily adhered to a textile product containing polyurethane even by a conventionally known treatment method such as a water-based dyeing method. The present inventors have completed the present invention based on the finding that moderate sustained release properties and washing durability can be exhibited.

The astaxanthin-attached textile product of the present invention comprises a textile product and astaxanthin attached to the textile product.
The textile product contains polyurethane. By including polyurethane in the textile product, astaxanthin can be easily attached to the textile product even by a conventionally known treatment method such as a water-based dyeing method. The reason for this is not clear, but the affinity between the soft segment of polyurethane (the portion derived from a compound having a hydroxyl group) and astaxanthin is high, and astaxanthin permeates into the soft segment portion and is not appropriately retained. It is speculated that

The polyurethane means a polymer having urethane bonds. The above polyurethane is usually produced by polyaddition of a compound having an isocyanate group and a hydroxyl group. Polyether-based polyurethanes, polyester-based polyurethanes, polycarbonate-based polyurethanes and the like are available depending on the type of compound having a hydroxyl group as a raw material, but any polyurethane can be used in the present invention. Among these, polyether-based polyurethanes and polyester-based polyurethanes are preferred, and polyether-based polyurethanes are more preferred, since they have particularly excellent affinity for astaxanthin.

The textile product may contain polyurethane. Specifically, for example, textile products consisting of only polyurethane fibers, textile products consisting of polyurethane fibers and other fibers, and fibers other than polyurethane coated with polyurethane. Textiles and the like containing coated fibers can be used. Among them, textile products composed of polyurethane fibers and other fibers are preferred because they are easy to manufacture, can impart excellent touch and texture, and can easily adjust the amount of astaxanthin attached. preferred.

As the polyurethane fiber, for example, commercially available products such as Mobilon (registered trademark) (manufactured by Nisshinbo Textile Co., Ltd.), Roica (registered trademark) (manufactured by Asahi Kasei Corporation), and Lycra (registered trademark) (manufactured by Toray Operontex Co., Ltd.) are used. be able to.

Other fibers mentioned above include natural fibers such as cotton (cellulosic fiber), hemp, silk, and wool, polyethylene terephthalate, rayon, polynosic, cupra, acetate, nylon, vinylon, vinylidene, polyvinyl chloride, acrylic, and acrylic. , polyethylene, polypropylene and other synthetic fibers. These other fibers may be used alone or in combination of two or more. Among them, cotton and/or rayon are used in many textile products such as underwear, and are suitable because they provide excellent touch and feel.

When the textile product consists of polyurethane fibers and other fibers, the preferable lower limit of the polyurethane fiber content in the textile product is 3% by weight, and the preferable upper limit thereof is 50% by weight. By setting the content of the polyurethane fiber in the mixed fiber within this range, it is possible to achieve both excellent touch and feel and a sufficient amount of astaxanthin attached. A more preferable lower limit of the polyurethane fiber content in the mixed fiber is 5% by weight, and a more preferable upper limit thereof is 35% by weight.

The astaxanthin is one of the xanthophylls, and is represented by the IUPAC name of 3,3'-dihydroxy-β,β-carotene-4,4'-dione. The astaxanthin has three optical isomers and four geometric isomers, and any of them can be used. The above astaxanthin also includes derivatives such as esters of astaxanthin.
The above-mentioned astaxanthin is known to have a high antioxidant effect, and is said to have an effect of improving ultraviolet rays and stress, an effect of improving muscle damage and diseases, and the like.
As the astaxanthin, natural products derived from some algae, krill, shrimp, sea bream, salmon, etc., or chemically synthesized products can be used.

As the above astaxanthin, those commercially available in the form of oil or suspension (aqueous suspension) can also be used. Also, astaxanthin may be used alone, or a mixture containing astaxanthin or a mixture with other xanthophylls may be used.
Specifically, commercially available oils and suspensions such as AstaReal (registered trademark) (manufactured by Fuji Chemical Industry Co., Ltd.) and Astats (registered trademark) (manufactured by Fujifilm Corporation) can be used.

In the astaxanthin-attached textile product of the present invention, the astaxanthin adhesion amount (initial adhesion amount) is preferably 0.00005 wt % (0.5 ppm) or more. When the astaxanthin adhesion amount (initial adhesion amount) is 0.00005 wt % (0.5 ppm) or more, it is possible to exhibit particularly high effects such as a stress-relieving effect. The astaxanthin adhesion amount (initial adhesion amount) is more preferably 0.00025 wt% (2.5 ppm) or more, and still more preferably 0.0005 wt% (5 ppm) or more. Although the upper limit of the astaxanthin adhesion amount (initial adhesion amount) is not particularly limited, the substantial upper limit is about 1.0 wt% (10000 ppm).
The amount of astaxanthin attached can be calculated from a calibration curve prepared in advance by extracting astaxanthin from a sample of astaxanthin-containing textile products with an organic solvent such as acetone, measuring the absorbance of the extract at a wavelength of 474 nm.

The astaxanthin-attached textile product of the present invention can be easily produced by a conventionally known treatment method such as a water-based dyeing method. Specifically, for example, it can be produced by a method of immersing or padding a textile product in a treatment liquid containing astaxanthin, followed by drying.

The astaxanthin-containing textile product of the present invention is not particularly limited, and in addition to clothes, handkerchiefs, towels, futons, and the like are suitable. In particular, when astaxanthin is attached to underwear, futons, mats, sheets, blankets, towel blankets, futon covers, collars for comforters, pillows, pillow covers, pajamas, etc., be aware of astaxanthin. Since astaxanthin is ingested over a long period of time, an extremely high effect can be expected.

According to the present invention, it is possible to provide an astaxanthin-containing fiber product that is easy to produce, releases astaxanthin slowly over a long period of time, and allows astaxanthin to be ingested on a daily basis by being worn.

2 is a graph showing the relationship between the number of times of washing each astaxanthin-attached textile product and the astaxanthin residual rate (%) in Experimental Example 1. FIG. 10 is a graph showing the relationship between the number of washings of each astaxanthin-attached textile product and the astaxanthin residual rate (%) in Experimental Example 2. FIG.

EXAMPLES The aspects of the present invention will be described in more detail below with reference to Examples, but the present invention is not limited to these Examples.

(Experimental example 1)
(1) Preparation of textile products Polyurethane fiber (Mobilon (registered trademark) (manufactured by Nisshinbo Textile Co., Ltd.)) and cotton yarn are milled, and the content of polyurethane fiber is 35% by weight and the content of cotton yarn is 65% by weight. % knits were produced (1-A). Similarly, 1-B to 1-G knits were produced with contents as shown in Table 1. In 1-B, a mixed fiber of cotton and rayon was used.

(2) Manufacture of astaxanthin-containing textile products Distilled water was added to a commercially available astaxanthin suspension (ASTOTS-AWS, manufactured by Fujifilm) to adjust the concentration, and an astaxanthin-treated solution having an astaxanthin concentration of 0.025%owf was prepared. prepared.
Each knit was immersed in the resulting astaxanthin-treated solution at a bath ratio of 1:5, squeezed with a padder, and subjected to tenter treatment at 60° C. for 7 minutes to obtain an astaxanthin-attached textile product.

(3) Measurement of astaxanthin adhesion amount (initial adhesion amount) A portion of the obtained astaxanthin-attached textile product was cut out, astaxanthin was extracted using acetone, and the absorbance of the extract was measured at a wavelength of 474 nm. The astaxanthin adhesion amount (initial adhesion amount) was calculated from a separately prepared calibration curve. Table 2 shows the results.

(4) Evaluation of washing durability Using a normal household washing machine (Panasonic, NA-F50B5), a detergent (Kao, Attack) was added to a concentration of 0.67 g / L. Washing was performed using the liquid at a bath ratio of 1:30. Each test fabric after washing was dried in the sun. This operation was repeated 30 times. After washing 1, 5, 10, 15, 20, 25 and 30 times, the amount of astaxanthin adhered to each astaxanthin-attached textile product was measured, and the astaxanthin residual rate (%) was measured when the initial amount of adherence was taken as 100%. Table 2 shows the results.

Based on the data in Table 2, FIG. 1 is a graph showing the relationship between the number of times each astaxanthin-containing textile product was washed and the astaxanthin residual rate (%).
As can be seen from FIG. 1, when the 1-D to 1-G knits containing no polyurethane fiber were used, the residual astaxanthin rate was 0% by the 15th washing. It can be seen that these nits have a low affinity for astaxanthin and all the astaxanthin is released in a very short period of time. On the other hand, it can be seen that in the case of using the knitted fabrics 1-A to 1-C containing polyurethane fibers, astaxanthin remains even after 30 washes. In addition, it can also be seen from these that the higher the content of polyurethane fibers, the more astaxanthin tends to remain.

(Experimental example 2)
(1) Preparation of textile products Polyurethane fiber (Mobilon (registered trademark) (manufactured by Nisshinbo Textile Co., Ltd.)) and cotton yarn are milled, and the content of polyurethane fiber is 35% by weight and the content of cotton yarn is 65% by weight. % knits were produced (2-A). Similarly, 2-B and 2-C knits were produced with the contents shown in Table 3.

(2) Production of textile products containing astaxanthin Distilled water was added to commercially available astaxanthin oil (ASTOTS-50S, manufactured by Fujifilm) to adjust the concentration, to prepare an astaxanthin-treated solution having an astaxanthin concentration of 0.025%owf. .
Each knit was immersed in the resulting astaxanthin-treated solution at a bath ratio of 1:5, squeezed with a padder, and subjected to tenter treatment at 60° C. for 7 minutes to obtain an astaxanthin-attached textile product.

(3) Measurement of astaxanthin adhesion amount (initial adhesion amount) A portion of the obtained astaxanthin-attached textile product was cut out, astaxanthin was extracted using acetone, and the absorbance of the extract was measured at a wavelength of 474 nm. The astaxanthin adhesion amount (initial adhesion amount) was calculated from a separately prepared calibration curve. Table 4 shows the results.

(4) Evaluation of washing durability Using a normal household washing machine (Panasonic, NA-F50B5), a detergent (Kao, Attack) was added to a concentration of 0.67 g / L. Washing was performed using the liquid at a bath ratio of 1:30. Each test fabric after washing was dried in the sun. This operation was repeated 30 times. After washing 1, 10, 15, 20, 25 and 30 times, the amount of astaxanthin adhered to each astaxanthin-attached textile product was measured, and the astaxanthin residual rate (%) was measured when the initial amount of adherence was taken as 100%. Table 4 shows the results.

Based on the data in Table 4, FIG. 2 is a graph showing the relationship between the number of times each astaxanthin-containing textile product was washed and the astaxanthin residual rate (%).
From FIG. 2, when the 2-C knitwear containing no polyurethane fiber was used, the astaxanthin residual rate was 0% by the 15th washing. It can be seen that this nit has a low affinity for astaxanthin and all the astaxanthin is released in a very short period of time. On the other hand, when the 2-A and 2-B knitted fabrics containing polyurethane fibers were used, astaxanthin remained even after 30 washes.

(Experimental example 3)
(1) Preparation of textile products Polyurethane fiber (Roica (registered trademark) (manufactured by Asahi Kasei Co., Ltd.)) and nylon thread are milled, and the content of polyurethane fiber is 40% by weight and the content of nylon thread is 60% by weight. % by weight knits were produced.

(2) Production of astaxanthin-containing textile products Distilled water was added to a commercially available astaxanthin suspension (ASTOTS-AWS, manufactured by Fujifilm) to adjust the concentration, and an astaxanthin-treated solution having an astaxanthin concentration of 0.0015%owf was prepared. prepared.
A knitted fabric was immersed in the resulting astaxanthin-treated solution at a bath ratio of 1:5, squeezed with a padder, and subjected to tenter treatment at 60° C. for 7 minutes to obtain an astaxanthin-attached textile product.

(3) Measurement of astaxanthin adhesion amount (initial adhesion amount) A portion of the obtained astaxanthin-attached textile product was cut out, astaxanthin was extracted using acetone, and the absorbance of the extract was measured at a wavelength of 474 nm. When the astaxanthin adhesion amount (initial adhesion amount) was calculated from a calibration curve prepared separately, it was 0.15 ppm.

(4) Evaluation of washing durability Using a normal household washing machine (Panasonic, NA-F50B5), a detergent (Kao, Attack) was added to a concentration of 0.67 g / L. Washing was performed using the liquid at a bath ratio of 1:30. Each test fabric after washing was dried in the sun. This operation was repeated 5 times. After washing 1 and 5 times, the astaxanthin adhesion amount of the astaxanthin-attached textile product was measured, and the astaxanthin residual rate (%) was measured when the initial adhesion amount was taken as 100%. The astaxanthin residual rate was 79.0% after one wash and 79.0% after five washes.

According to the present invention, it is possible to provide an astaxanthin-containing fiber product that is easy to produce, releases astaxanthin slowly over a long period of time, and allows daily ingestion of astaxanthin by wearing the product.

Claims (4)

An astaxanthin-added textile product comprising a textile product containing polyurethane and astaxanthin adhering to the textile product. 2. The astaxanthin-attached textile product according to claim 1, wherein the textile product containing polyurethane is a textile product comprising a mixed fiber of polyurethane fiber and other fiber. 3. The textile product with astaxanthin according to claim 2, wherein the other fibers are cotton and/or rayon. 4. The astaxanthin-containing fiber product according to claim 1, 2 or 3, wherein the amount of astaxanthin attached (initial amount) is 0.00005 wt % or more.

Images