JP2005336665A - Uv light reflection-blocking fabric and uv light reflection-blocking fiber product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a UV light reflection-blocking fabric reducing reflection of UV lights from a worn fiber product together with reducing permeation of the UV lights, being expected to prevent sun burn of exposed skin, and when a fluorescent brightener is used, suppressing reduction of its function, and presenting fiber products having good washing durability. <P>SOLUTION: The UV light reflection-blocking fabric is added with a UV absorber and has ≤20% UV transmission of 280-400 nm wave length, ≤30% reflectance and ≤70% of the reflectance based on the reflectance given when the UV absorber is not added. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ultraviolet antireflection fabric, a method for producing the same, and an ultraviolet antireflection fiber product. More specifically, the present invention reduces the ultraviolet transmittance by reducing the transmittance and reflectance of ultraviolet rays, reduces the reflection of ultraviolet rays from the worn textiles, and prevents sunburn of the exposed skin. The present invention relates to an ultraviolet antireflective fabric that provides an expected textile product, a method for efficiently producing the fabric, and an ultraviolet antireflective fiber product having the preferred properties described above.

In recent years, it is known from dermatological research that aging of the skin is caused by a decrease in moisturizing function with aging, accumulation of external stimuli due to ultraviolet rays and the like, and a decrease in skin cell function. Among these, it is extremely important from the viewpoint of preventing skin aging to protect the skin from ultraviolet ray damage.
In the dermatology field, UV rays of 200 to 290 nm that are absorbed by the ozone layer and do not reach the ground surface are short wavelength UV (UV-C), but reach the ground surface but are transmitted through the glass. Those having a wavelength of 290 to 320 nm, which cannot be performed, are referred to as medium wavelength UV (UV-B), and those having a wavelength of 320 to 400 nm which transmits through glass are referred to as long wavelength UV (UV-A). Among these ultraviolet rays, UV-A and UV-B reach the earth's surface and cause various damages to the skin.

For example, UV-A promotes skin aging such as darkening the skin, causing spots and freckles, while UV-B causes the skin to become reddish, lit by fire, and produces water bubbles. It is known to have an adverse effect on the skin.
Therefore, various products for preventing ultraviolet rays have been developed in the cosmetics field. In recent years, it has been demanded that textile products such as clothes have a function of preventing ultraviolet rays. Prevention products have been developed and marketed.
As a method for imparting an ultraviolet ray prevention function to textile products, measures to reduce the ultraviolet ray transmittance have been mainly taken so far, and inorganic ultraviolet ray reflection materials such as light reflection ceramics and ultraviolet ray reflection agents as ultraviolet ray blocking materials. Mold materials or organic UV absorbers are used.

These UV-blocking materials are generally kneaded at the spinning stage in order to give UV protection to textile products, or adsorb UV absorbers on the fabric surface in post-processing, or use UV absorbers as resins. A method of dispersing and coating the surface of the fabric has been adopted (for example, see Non-Patent Document 1).
In particular, when an ultraviolet blocking material is kneaded into a synthetic fiber at the spinning stage, an inorganic ultraviolet reflective material is overwhelmingly used because of the melting temperature. In addition, when an ultraviolet ray preventing function is imparted by post-processing, if an ultraviolet absorbent is used for a fabric treated with a fluorescent whitening agent, the fluorescent whitening is inhibited. Therefore, an inorganic ultraviolet reflective material should be used. Has been attempted (see, for example, Patent Document 1). However, when such an ultraviolet reflective material is used, exposed skin that is not covered with clothes may increase sunburn due to the reflection of clothes.

  Moreover, when providing an ultraviolet-ray prevention function by post-processing, the problem that it is easy to become inferior to washing durability arises. In order to deal with such a problem, for example, the fabric is put into a treatment bath in which an ultraviolet absorber is dissolved, the treatment bath is set to be weakly acidic, and is subjected to an immersion treatment at 60 to 130 ° C. There is disclosed a method for producing an ultraviolet light transmission-prevented fabric that is provided with a treatment liquid mainly composed of an ultraviolet absorber and / or an ultraviolet reflection pigment and a synthetic polymer, and that is heat-treated after drying (see, for example, Patent Document 2). . And, according to this method, it is described that an ultraviolet light transmission preventing processed fabric having good washing durability can be obtained. However, there is no description regarding the ultraviolet reflectance, including the Patent Document 1.

JP-A-5-179568 Japanese Patent Laid-Open No. 5-9871 “Processing Technology” vol. 26, no. 10 (1991), p. 649

  Under such circumstances, the present invention reduces the transmittance and reflectance of ultraviolet rays, thereby reducing the transmission of ultraviolet rays and reducing the reflection of ultraviolet rays from the worn textiles. An anti-reflective fabric that can be expected to prevent sunburn and that can suppress degradation of its function when an optical brightener is used, and that provides a textile product with good washing durability. It is an object of the present invention to provide a production method and an ultraviolet antireflection fiber product having the above-mentioned preferable properties.

As a result of intensive studies to achieve the above object, the present inventors have attached an ultraviolet absorber, and the transmittance and reflectance of ultraviolet rays in a specific wavelength range are each below a certain value, It has been found that a fabric having a reflectance of 70% or less with respect to the value when the ultraviolet absorber is not attached can meet the purpose as an ultraviolet antireflection fabric.
It has also been found that this ultraviolet antireflection fabric can be obtained by immersing and drying the fabric in a treatment bath in which an ultraviolet absorber is dissolved or dispersed.
The present invention has been completed based on such findings.

That is, the present invention provides the following inventions.
(1) An ultraviolet absorber is attached, the transmittance of ultraviolet rays having a wavelength of 280 to 400 nm is 20% or less, the reflectance is 30% or less, and the ultraviolet reflectance is not attached to the ultraviolet absorber. The anti-reflective fabric for ultraviolet rays, which is 70% or less of the numerical value in the case.
(2) The ultraviolet antireflection fabric according to item (1), wherein a fluorescent brightener is attached together with the ultraviolet absorber.
(3) The ultraviolet antireflection fabric according to (1) or (2) above, wherein the adhesion amount of the ultraviolet absorber is 0.2 to 10 g per 100 g of the fabric.
(4) The amount of the fluorescent whitening agent attached is 0.05 to 0.5 g per 100 g of the fabric, and the ratio of the amount of the ultraviolet absorber and the fluorescent whitening agent attached is 40: 1 to 4: 1. The ultraviolet antireflection fabric according to (1), (2) or (3), which is 1.
(5) The ultraviolet antireflection fabric according to any one of (1) to (4), wherein the ultraviolet absorber is a benzophenone derivative and / or a benzotriazole derivative.
(6) An ultraviolet antireflection fiber product obtained by processing the ultraviolet antireflection fabric according to any one of (1) to (5) above.

According to the present invention, by reducing the transmittance and reflectance of ultraviolet rays, the transmission of ultraviolet rays is reduced, the reflection of ultraviolet rays from a worn textile product is reduced, and sunburn of the exposed portion of the skin can be expected. In addition, when an optical brightener is used, it is possible to provide an ultraviolet antireflection fabric that can suppress a decrease in its function and give a textile product with good washing durability.
Furthermore, according to the present invention, it is possible to provide a method for efficiently producing the ultraviolet antireflection fabric, and an ultraviolet antireflection fiber product having the preferred properties.

The ultraviolet antireflection fabric of the present invention has an ultraviolet absorber and, if necessary, a fluorescent whitening agent attached thereto, has an ultraviolet transmittance of 280 to 400 nm, a reflectance of 20% or less, and a reflectance of 30% or less. The reflectance is 70% or less with respect to the numerical value when the ultraviolet absorber is not attached.
When the transmittance and reflectance of ultraviolet rays having a wavelength of 280 to 400 nm (including UV-A and UV-B) satisfy the above requirements, the ultraviolet antireflection fabric of the present invention reduces transmission of ultraviolet rays, It can reduce the reflection of ultraviolet rays from the worn textiles and prevent sunburn of the exposed skin.
The lower limits of the ultraviolet transmittance and the ultraviolet reflectance are not particularly limited, but the lower limit of the ultraviolet transmittance is usually about 3%, and the lower limit of the ultraviolet reflectance is usually about 10%. The lower limit of the ratio of the ultraviolet reflectance to the numerical value when the ultraviolet absorbent is not attached is not particularly limited, but is usually about 50%.

The fabric used for the ultraviolet antireflection fabric of the present invention may be any of a woven fabric, a knitted fabric, and a non-woven fabric. The fibers include natural fibers such as cotton, silk, hemp, wool, and tencel (purified cellulose). Recycled fibers such as viscose rayon and copper ammonia rayon, semi-synthetic fibers such as acetate and triacetate, synthetic fibers such as polyester, polyamide (nylon), polypropylene, acrylic and vinylon, and blends of these fibers . The fabric may be one using these fibers, or may be a combination of two or more.
The ultraviolet absorber is not particularly limited, and conventionally known ultraviolet absorbers such as aminobenzoic acid derivatives such as ethyl p-aminobenzoate and 2-ethylhexyl p-dimethylaminobenzoate, ethoxyethyl p-methoxycinnamate, 2-methylhexyl p-methoxycinnamate, cinnamate derivatives such as p-methoxycinnamate of glycerin, salicylic acid derivatives such as phenyl salicylate, p-octylphenyl salicylate, p-t-butylphenyl salicylate,

2,2′-dihydroxy-4-methoxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, Benzophenone derivatives such as 2,4-dihydroxybenzophenone and 2-hydroxy-4-octoxybenzophenone, 2 · (2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) -5-chlorobenzotriazole, 2 -(2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-tert-amyl-5'-isobutylphenyl) -5 -Chlorobenzotriazole, 2- (2'-hydroxy-3'-isobutyl-5 -Methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-isobutyl-5'-propylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5' -Di-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- [2'-hydroxy-5 '-(1,1,3,3-tetramethyl) ) Phenyl] benzotriazole and other benzotriazole derivatives,

Substituted acrylonitrile derivatives such as ethyl 2-cyano-3,3-diphenylacrylate and 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, resorcinol monobenzoate, 2,4-di-t-butylphenyl- 3,5-di-t-butyl-4-hydroxybenzoate, N- (2-ethylphenyl) -N ′-(2-ethoxy-5-t-butylphenyl) succinic acid diamide, 4-t-butyl-4 ′ -It can select suitably from methoxybenzoylmethane etc. and can use. Of these ultraviolet absorbers, benzophenone derivatives and benzotriazole derivatives are preferred.
These ultraviolet absorbers may be used individually by 1 type, and may be used in combination of 2 or more type.

In the ultraviolet antireflection fabric of the present invention, there is no particular limitation on the fluorescent whitening agent attached as necessary, and conventionally known fluorescent whitening agents such as stilbene, imidazole, thiazole, oxazole, and triazole are known. , Oxadiazole, thiadiazole, coumarin, naphthalimide, pyrazoline, oxacyanin, methine, pyridine, anthrapyridazine, carbostyril, etc. It can be appropriately selected and used.
In the present invention, the amount of the ultraviolet absorber attached is not particularly limited, but is usually about 0.2 to 10 g per 100 g of the fabric. If the adhesion amount of the ultraviolet absorber is within the above range, the ultraviolet transmittance can be 20% or less and the ultraviolet reflectance can be 30% or less, which is also good in terms of the balance between effect and economy. The preferable adhesion amount of the ultraviolet absorber is in the range of 0.2 to 10 g per 100 g of the fabric, and particularly preferably in the range of 0.5 to 5 g.

The amount of the fluorescent whitening agent attached is not particularly limited, but is usually about 0.05 to 0.5 g per 100 g of the fabric, and the ratio of the amount of the ultraviolet light absorber to the fluorescent whitening agent is The mass ratio is 40: 1 to 4: 1. If the amount of the fluorescent whitening agent and the proportion of the ultraviolet absorber and the fluorescent whitening agent are within the above ranges, the function as the fluorescent whitening agent is exhibited well. Preferably, the amount of the fluorescent whitening agent to be adhered is 0.01 to 0.5 g per 100 g of the fabric, and the ratio of the amount of the ultraviolet absorber to the fluorescent whitening agent is 20: 1 to 4: 1 by mass ratio. Yes, more preferably, the amount of the fluorescent whitening agent to be attached is 0.1 to 0.4 g per 100 g of the fabric, and the ratio of the amount of the ultraviolet absorber to the fluorescent whitening agent is 10: 1 to 5 by mass ratio. : 1.
As described above, the ultraviolet antireflection fabric of the present invention having such properties reduces the transmission of ultraviolet rays by suppressing the transmittance of ultraviolet rays having a wavelength of 280 to 400 nm to 20% or less and the reflectance to 30% or less. In addition, it reduces the reflection of ultraviolet rays from the worn textile products, and can be expected to prevent sunburn of the skin of the exposed part, and when using a fluorescent whitening agent, it can suppress a decrease in its function, In addition, it is possible to provide a textile product having good washing durability.

Next, a method for producing the ultraviolet antireflection fabric of the present invention will be described.
In the present invention, first, a treatment bath is prepared by dissolving or dispersing an ultraviolet absorber and, if necessary, an optical brightener so that the ratio of the ultraviolet absorber and the fluorescent brightener is the aforementioned mass ratio. Prepare. In this treatment bath, various conventionally known additives such as softeners, colorants, sewability improvers, penetrants (surfactants) and the like can be appropriately contained as necessary.
Although there is no restriction | limiting in particular in the solid content density | concentration of this processing bath, Usually, about 1-30 mass%, Preferably it is 3-20 mass%.

In the present invention, the fabric to be treated is immersed in the treatment bath and then dried, so that the fabric has an ultraviolet absorber and, if necessary, a fluorescent brightener, a softening agent, a sewability improver, etc. To attach.
There are no particular limitations on the method of dipping and drying the fabric, and conventionally known methods such as a pad / dry method using a tenter, a method using a liquid dyeing machine, a method using a drum dyeing machine, and the like can be employed.
The amount of each component attached to the fabric can be determined by the concentration and squeezing rate of each component in the treatment bath.

The present invention also provides an ultraviolet antireflection fiber product obtained by processing the above-described ultraviolet antireflection fabric of the present invention.
This UV anti-reflection fiber product is excellent in UV transmission prevention and UV reflection prevention effects, and is therefore suitable for shirts, jumpers, parasols, hats, aprons, and the like.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
In addition, the ultraviolet reflectance and ultraviolet transmittance measured the reflectance and transmittance | permeability of wavelength 280-400 nm using the spectrophotometer "UV2550" by Shimadzu Corporation.
Example 1
As a fabric, a raw machine knitted with a 30-inch, 28-gauge round knitting machine with 100% cotton 60-count double yarn was subjected to normal mercerization, then refined and bleached (off bleached), and further dyed light blue A thing was used.
UV absorber [made by Ciba Specialty Chemicals, trade name “Tinofast CUT-01”, benzotriazole derivative type] 2.0% by mass, softener [made by Morin, trade name “Molin Softer CF”, aliphatic type 4.0% by mass, Sewing improver [trade name “Maycatex HP-780”, polyethylene emulsion type, manufactured by Meisei Chemical Co., Ltd.] 2.0% by mass and penetrant (surfactant) [Dainippon Ink and Chemicals, Inc. Manufactured, trade name “FINETEX NRW”, nonionic surfactant] A treatment bath containing 0.5% by mass is prepared, and the fabric is treated by a pad / dry method using a tenter, and then 120 ° C. at 120 ° C. For 2 seconds. The evaluation results of this treated fabric are shown in Table 1.

Comparative Example 1
In Example 1, the same treatment as in Example 1 was performed except that a treatment bath containing no ultraviolet absorber was used.
The evaluation results of this treated fabric are shown in Table 1.

Example 2
As the fabric, a raw machine obtained by knitting a double yarn of 100% cotton 60 count with a 30 inch / 28 gauge circular knitting machine and then refining and bleaching after normal mercerizing was used.
UV absorber (supra) 2.0% by mass, fluorescent brightener [made by Nippon Kayaku Co., Ltd., trade name “Kayahol PBS”] 0.25% by mass, dye for bluing [made by BASF, trade name “IN” Dunslen VIOLET 3B "] 0.002% by mass, softener (above) 4.0% by mass, sewn improver (above) 2.0% by mass and penetrant (surfactant, supra) 0. A treatment bath containing 5% by mass was prepared, and the fabric was subjected to a dipping treatment by a pad / dry method using a tenter and then dried at 130 ° C. for 120 seconds. The evaluation results of this treated fabric are shown in Table 2.

Comparative Example 2
In Example 2, the treatment bath does not contain an ultraviolet absorber, the content of the fluorescent whitening agent is 0.05% by mass, the content of the bluish dye is 0.0012% by mass, Were the same as in Example 2 except that the same materials were used.
The evaluation results of this treated fabric are shown in Table 2.

As can be seen from Tables 1 and 2, the ultraviolet antireflection fabrics of the present invention (Examples 1 and 2) both have an ultraviolet transmittance and reflectance of 280 to 400 nm before washing, respectively. % And less than 30%.
Also, the ultraviolet reflectance is less than 70% before washing with respect to the comparative example. Further, even after 10 washings, the transmittance and reflectance of ultraviolet rays are kept low, which indicates that it has good washing durability.
Moreover, the whiteness of Example 2 and Comparative Example 2 is almost the same, and it is shown that the fluorescent whitening agent functions even when the ultraviolet absorber and the fluorescent whitening agent are used in combination.

The UV anti-reflective fabric of the present invention reduces the transmission of UV rays and reduces the reflection of UV rays from the worn textile product, and can be expected to prevent sunburn of the exposed skin, and when a fluorescent whitening agent is used Therefore, it is possible to suppress a decrease in the function and to provide a textile product having good washing durability.

Claims (6)

  A numerical value when an ultraviolet absorber is attached, the transmittance of ultraviolet rays having a wavelength of 280 to 400 nm is 20% or less, the reflectance is 30% or less, and the ultraviolet reflectance is not attached to the ultraviolet absorber. In contrast, an ultraviolet antireflection fabric characterized by being 70% or less.   The ultraviolet antireflection fabric according to claim 1, wherein a fluorescent brightening agent is attached together with the ultraviolet absorber.   The ultraviolet antireflection fabric according to claim 1 or 2, wherein the amount of the ultraviolet absorber attached is 0.2 to 10 g per 100 g of the fabric.   The adhesion amount of the optical brightener is 0.05 to 0.5 g per 100 g of the fabric, and the ratio of the adhesion amount of the ultraviolet absorber and the optical brightener is 40: 1 to 4: 1 by mass ratio. The ultraviolet antireflection fabric according to claim 1, 2 or 3.   The ultraviolet antireflection fabric according to any one of claims 1 to 4, wherein the ultraviolet absorber is a benzophenone derivative and / or a benzotriazole derivative. An ultraviolet antireflection fiber product obtained by processing the ultraviolet antireflection fabric according to any one of claims 1 to 5.