JP2021514032A - High visibility nylon fiber woven knitted fabric and its applications - Google Patents

Abstract

The present invention relates to a kind of highly visible nylon fiber woven knitted fabric and its use. The woven or knitted fabric is a fluorescent yellow woven fabric or knitted fabric made of nylon fibers, which contains a coumarin-based acidic fluorescent yellow dye and a rhodamine-based acidic fluorescent red dye in the nylon fibers, and is irradiated with a xenon lamp in accordance with the ISO 20471: 2013 standard. Later, or after carbon arc lamp irradiation or xenon lamp irradiation in accordance with the JIS T8127: 2015 standard, the CIE chromaticity coordinate description (x, y) is (0.387, 0.610), (0.356, 0. Within the range of (494), (0.398, 0.452) and (0.460, 0.540), the brightness value β is 0.70 or more. Since the present invention has good productivity and excellent light resistance, it can be widely applied to the production of various safety clothing.

Description

The present invention belongs to the field of fiber materials, and particularly relates to highly visible nylon fiber woven and knitted fabrics and their uses.

With the rapid development of the road transportation business and the sea transportation business, the incidence of accidents tends to increase. It often happens that workers in a highly focused work environment are unable to immediately detect dangerous situations around them and take proactive evasive measures. Therefore, clothes with high visibility are indispensable measures for solving the safety problem of workers. Currently, high-visibility clothing is used as work clothing in many fields such as environmental hygiene, police, emergency, postal express delivery, and construction. However, although many workers wear high-visibility clothing, the effect of visibility is insufficient to protect themselves and may affect traffic.

High-visibility woven and knitted fabrics used for such clothing are generally made to recognize the presence of an operator and call attention by applying a shiny resin layer or dyeing with a fluorescent dye. With long-term use, most clothing has the problem of reduced visibility. The cause is that there is a lot of outdoor work, and when exposed to long-term sunlight, problems such as peeling of the resin layer or decomposition and sublimation of fluorescent dyes occur, the color gradually fades, the light resistance deteriorates, and safety protection The effect is reduced. If you update it without fail, your clothes will be wasted and the financial burden will increase.

On the other hand, high quality requirements for high visibility woven and knitted fabrics are introduced in detail in ISO 20711: 2013 and JIS T 8127: 2015 standards. The ISO standard stipulates standardized quality requirements mainly for products for the Western market. The JIS standard stipulates standardized quality requirements mainly for products for the Japanese market.

The main differences between the ISO standard and the JIS standard are as follows: In the ISO standard, irradiation evaluation is performed using a xenon lamp, but in addition to irradiation evaluation using a xenon lamp, high-intensity irradiation evaluation using a carbon arc lamp is also performed in the JIS standard. It is even more difficult to meet JIS standards. The present invention provides a woven or knitted fabric that satisfies the light resistance required by the ISO standard and at the same time satisfies the light resistance after carbon arc lamp irradiation required by the JIS standard.

Currently, there are many studies on high-visibility woven and knitted fabrics, but there are quite a few products that meet both ISO and JIS standards. In Patent Document CN 10296185A, regarding a method for dyeing a polyester / cotton fiber blended fluorescent woven fabric, the fabric pretreatment, dyeing, posttreatment, and finishing steps are included, and the polyester / cotton fiber fluorescent yellow woven fabric is mainly used as firefighting clothes. .. The fire brigade is flame-retardant, and most fire sites have thick smoke, which has a great effect on effective communication between firefighters. When firefighters wear firefighter clothing made of polyester / cotton fiber fluorescent yellow fabric, the light reflection effect of the body itself is clearly increased, making it easier for firefighters at the fire site to communicate with each other. The incidence of injuries was also reduced.

However, nylon has high crystallinity and poor dyeing fastness. Further, since it is used outdoors and in an environment of strong light irradiation, the conventional high-visibility nylon product cannot maintain high visibility after being used for a long time, and therefore cannot satisfy the ISO standard.

An object of the present invention is to provide a highly visible fluorescent yellow nylon fiber woven knit with high productivity and excellent light resistance, and safety clothing using the highly visible nylon fiber woven knit.

In order to solve the above problems, the highly visible nylon fiber woven knitted fabric of the present invention has the following constitution. That is,
A fluorescent yellow woven fabric or knitted fabric made of 100% nylon fiber, which contains a coumarin-based acidic fluorescent yellow dye and a rhodamine-based acidic fluorescent red dye in the nylon fiber, and is irradiated with a xenon lamp in accordance with the ISO 20471: 2013 standard. Alternatively, after carbon arc lamp irradiation or xenon lamp irradiation in accordance with the JIS T8127: 2015 standard, the CIE chromaticity coordinates (x, y) are (0.387, 0.610), (0.356, 0.494), Within the range of (0.398, 0.452) and (0.460, 0.540), the minimum brightness value β is 0.70 or more.

In the present invention, the nylon fiber woven or knitted fabric obtained by simultaneously using a specific type of acidic fluorescent yellow dye and a specific type of acidic fluorescent red dye has light discoloration resistance as compared with a conventional coated product or putting processed product. Is greatly improved, and even a lightweight and thin product of ^{30 g / m 2 or less has high visibility.}

The highly visible nylon fiber woven and knitted fabric of the present invention is a fluorescent yellow woven fabric or knitted fabric made of 100% nylon fibers, and contains a coumarin-based acidic fluorescent yellow dye and a rhodamine-based acidic fluorescent red dye in the nylon fibers.

The nylon fiber used in the present invention is not particularly limited, but nylon 6 and nylon 66 are preferable. The cross-sectional shape may be round or irregular such as a triangle or a quadrangle.

Since the coumarin-based acidic fluorescent yellow dye used in the present invention has a benzopyran structure, it has an extremely high fluorescence quantum yield, its photochemical property can be adjusted, and its fluorescence coloring effect is good. In addition, the coumarin-based acidic fluorescent yellow dye has a lactone structure, can suppress the rotation of double bonds, greatly improves photostability, and has good color fastness.

Here, the coumarin acidic fluorescent yellow dye is a compound having the structure of the following formula 3 and a derivative thereof.

The acidic fluorescent red dye used in the present invention is a rhodamine-based derivative dye. Rhodamine-based acidic fluorescent red dyes have higher photostability, wider wavelength range, higher fluorescence quantum yield, and are more sensitive to pH values than other fluorescent red dyes such as azo and pyrrol derivatives. There are advantages such as not. In addition, when dyeing the acidic fluorescent red dye and the coumarin acidic fluorescent yellow dye in combination in the present invention, the CIE chromaticity coordinates (x, y) of the obtained woven and knitted fabric are ISO 20471: 2013 standard. Alternatively, the ranges specified in the JIS T 8127: 2015 standard (0.377, 0.6910), (0.374, 0.494), (0.398, 0.452) and (0.460, 0. It exists in the central region of 560). Further, after irradiation with a xenon lamp or carbon arc lamp, the CIE chromaticity coordinates (x, y) of the woven or knitted fabric are within the range specified by the ISO 20471: 2013 standard or the JIS T8127: 2015 standard.

CIE chromaticity coordinate description (x, y) of the woven or knitted fabric measured after irradiation with a xenon lamp according to the ISO 20471: 2013 standard, or after irradiation with a carbon arc lamp or a xenon lamp according to the JIS T8127: 2015 standard. ) Is the minimum brightness value β within the range of (0.387, 0.610), (0.356, 0.494), (0.398, 0.452) and (0.460, 0.540). Is 0.70 or more. Here, the rhodamine-based acidic fluorescent red dye is a compound having a matrix structure of the following formula 4.

In the present invention, the coumarin-based acidic fluorescent yellow dye is preferably 1 to 4% by weight. The rhodamine-based acidic red dye is preferably 0.005 to 0.02% by weight. When the amount of the acidic fluorescent yellow dye used is less than 1% by weight, the color is shallow and the visibility tends to be poor, and the CIE chromaticity coordinates (x, y) are set to ISO 20471: 2013 standard or JIS T8127: 2015 standard. May not meet the requirements for specified colors. If the amount of acidic fluorescent yellow dye used exceeds 4% by weight, the woven or knitted fabric shall meet the requirements for colors specified in ISO 20471 :: 2013 standard or JIS T8127: 2015 standard after carbon arc lamp irradiation or xenon lamp irradiation. It may not be met and the dyeing cost will be high. If the amount of the acidic fluorescent red dye used is less than 0.005% by weight, the purpose of adjusting the CIE chromaticity coordinates of the woven or knitted fabric may not be achieved. If the amount used exceeds 0.02% by weight, the CIE chromaticity coordinates of the woven or knitted fabric may be outside the chromaticity range specified by the ISO 20471: 2013 standard or the JIS T8127: 2015 standard. The initial CIE luminance coordinate description (x, y) of the nylon fiber woven knitted fabric of the present invention measured according to the ISO 20471: 2013 standard or the JIS T8127: 2015 standard is (0.387, 0.610), (0). Within the range of .356, 0.494), (0.398, 0.452) and (0.460, 0.540), the minimum luminance value β is 0.70 or more.

As is well known, excessive exposure to UV light can affect your health. For example, sunburn, wrinkles, sunburn, etc. Generally, clothes are required to have a function of absorbing ultraviolet rays or blocking ultraviolet rays. Inorganic UV absorbers such as titanium dioxide have problems such as poor UV durability because they have low affinity with fibers and poor adhesion. Therefore, in the present invention, it is preferable to further contain an organic ultraviolet absorber (organic UV absorber). The amount of the organic UV absorber used can be adjusted as needed, preferably 1 to 4% by weight. If the amount used exceeds 4% by weight, the UV absorber absorbs a large amount of ultraviolet rays and cannot convert sufficient ultraviolet rays as a fluorescent dye into fluorescence, which may affect the fluorescent color development of the dye.

When selecting the organic UV absorber used in the present invention, it should be considered that not only the affinity with the woven or knitted material for processing but also the basic physical properties such as washing fastness, light fastness and tear strength can be satisfied. is there. The organic UV absorber used in the present invention may be a commercially available product or may be synthesized by a technique known in the art.

The organic UV absorber used in the present invention is one or several of benzoic acid ester type, benzophenone type, benzotrisol type, benzotriazine type and benzoxazinone type. In general, ultraviolet rays having a diameter of 300 to 400 nm have the most severe degree of destruction of the dye structure. Since the benzotrisol-based or benzotriazine-based ultraviolet absorber can absorb ultraviolet rays of 300 to 400 nm, it not only enhances the light resistance of the woven or knitted fabric, but also does not affect the fluorescent color development of the fluorescent dye. It is preferable to use these UV absorbers.

The benzotriazole-based ultraviolet absorber is a compound having the structure of the following formula 1.

Preferably further including -SO 3 _H groups in the above compounds. -SO 3 _H groups can be reacted with the -NH ₂ group on the nylon fiber, an organic UV absorber by causing firmly adhere to nylon fibers, it is possible to improve the durability.

The benzotriazine-based ultraviolet absorber is a compound having the structure of the following formula 2.

In formula 2, R ₁ is an alkyl group of −H, C _1-6 , −OH, −OCH ₃ , −SCH ₃ or a substituent having the following structure.

R ₂ is a substituent having the following structure and has the following structure.

R ₃ is a substituent having the following structure.

In the present invention, alkyl has a commonly known meaning in the art, with C _1-6 alkyl being preferred. Examples of the C _1-6 alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a secondary butyl group, a tert-butyl group, an amyl group, an isoamyl group, a secondary amyl group, and a neopentyl group. , Tert-Pentyl group, hexyl group, isohexyl group and the like.

Since the organic ultraviolet absorber can absorb ultraviolet rays in a relatively wide range of 300 to 400 nm, it is advantageous for improving light resistance. Here, the non-reactive UV absorber does not have a reactive matrix by itself, and therefore generally adheres to the fiber surface in a monomolecular state.

The high-visibility nylon woven or knitted fabric of the present invention not only satisfies the light irradiation requirements of ISO standard and JIS standard, but also satisfies the fastness requirement items in the standard at the same time. Discoloration and fading 4 to 5 grades, contamination 4 grades, light fastness 3 to 4 grades, sweat fastness 4 to 4 grades or higher, heat pressure fastness 4 to 5 grades or higher in washing fastness.

A waterproof / breathable resin layer is provided on one side of the highly visible nylon woven or knitted fabric of the present invention. The waterproof / breathable resin layer may have a microporous structure or a non-porous structure. It preferably has a microporous structure and has a pore size of 0.001 to 40 μm. It may be obtained by a wet coating process or may be obtained by a laminating process. For lamination, a resin film to be used is water pressure resistance (by JIS L 1092 A-2009) is 3000mmH ₂ O or more, (by JIS L 1099 A-2012) moisture permeability is 5000g ^/ m 2 · 24h or more. The resin component of the resin layer is not particularly limited, but an aqueous polyurethane (abbreviated as PU) resin or a polytetrafluoroethylene (abbreviated as PTFE) resin is preferable.

The highly visible woven or knitted fabric of the present invention can be obtained by a method including the following procedure.

A 100% nylon fiber woven fabric or knitted fabric is placed in a dyeing machine and uniformly mixed with a dyeing solution containing a cimarin-based fluorescent yellow acid dye and a rhodamine-based fluorescent red acid dye, with a bath ratio of 1: 5 to 50. , Incubate at 80-110 ° C. for 25-60 minutes, then fix and wash under normal conditions, and finally dry and set to obtain a finished product.

Among these, the amount of each dye used can be adjusted as needed. The coumarin-based acidic fluorescent yellow dye is preferably 1 to 4% by weight. The rhodamine-based acidic red dye is preferably 0.005 to 0.02% by weight.

It is preferable to add 1 to 4% o.w.f. of an organic UV absorber into the processing liquid. It not only enhances the light resistance of woven and knitted fabrics, but also does not affect the fluorescent color development of fluorescent dyes.

It is preferable to coat one side of the set-processed product with a resin or attach a resin film to the product, and then wash and dry the product.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

The physical properties of Examples and Comparative Examples are measured by the following methods.
(1) Confirmation of acid dye and UV absorber 1 g of nylon dyed product was dissolved in a flask containing 100 mL of formic acid, then the flask was placed in a constant temperature bath, treated at 45 ° C. for 60 minutes, and then the treatment liquid was taken out. The structure of the liquid sample is measured using an infrared spectrophotometer, the IR spectrum of the above solution is obtained, and based on the characteristic group corresponding to the characteristic peak, the woven or knitted fabric is coumarin-based / rhodamine-based dye or benzotriazine-based. / Determine whether to include a benzotrisol UV absorber. In this infrared feature peaks corresponding to the coumarin dye 1870~1550cm ^-1, 1600~1450cm ^-1, a 1310~1020cm ^-1. The infrared characteristic peaks corresponding to rhodamine dyes are 1600 to 1450 cm ^-1 and 1310 to 1020 cm ^-1 . The infrared characteristic peaks corresponding to benzotriazine-based UV absorbers are 1600 to 1450 cm ^-1 and 3420 to 3250 cm ^-1 . Infrared feature peaks 1600～1450Cm ^-1 corresponding to benzotriazole tetrazole-based UV absorbers, 1310~1250cm ^{-1, 1280~1180cm -1,} a 1280~1180cm ^-1.

Next, the treatment liquid is taken out, the absorbance of the treatment liquid is measured using an ultraviolet spectrophotometer, and the type and characteristic structure of the dye are further determined based on the absorption status (peak and waveform) in each region of the light wavelength. .. Among them, the ultraviolet absorption peak and the visible light absorption peak corresponding to the coumarin dye are 300 to 310 cm ^-1 and 450 to 465 cm ^-1 . The ultraviolet absorption peaks and visible light absorption peaks corresponding to the rhodamine dyes are 360 to 380 cm ^-1 and 550 to 570 cm ^-1 . The ultraviolet absorption peaks and visible light absorption peaks corresponding to the benzotriazine-based UV absorbers are 280 to 290 cm ^-1 and 345 to 355 cm ^-1 . UV absorption peak and the visible light absorption peaks corresponding to benzotriazole tetrazole-based UV absorbers 225~235cm ^-1, 315~320cm ^-1, a 385~390cm ^-1.
(2) Chromaticity coordinates (color value x, color value y)
ISO 2047: 2013 standard or JIS T8127: 2015 standard CIE15.
(3) Brightness factor (brightness β value)
ISO 2047: 2013 standard or JIS T 8127: 2015 standard CIE15.
(4) Washing fastness ISO 105-C06 ^b : 2010.
(4) Sweat resistance fastness ISO 105-E04: 2013.
(6) Light fastness ISO 105-B02: 2014.
(7) Heat-resistant pressure fastness ISO 105-X11: 1994.
(8) Take a sample with a hole diameter of 0.5 cm x 0.5 cm, fix it on the SEM imaging table in the direction perpendicular to the surface of the desk, photograph the cross section of the sample with the SEM, and magnify it 1000 to 3000 times. Read the size of the hole diameter.

Each drug described in the following Examples and Comparative Examples is as follows.
(1) Acid Dye Acid Fluorescent Yellow Dye A
Fluorescent Yellow A-1: Coumarin-based, provided by DyStar (Shanghai) Trading Co., Ltd .;
Fluorescent Yellow A-2: Xanthene, provided by Hangzhou Anlongda Chemical Co., Ltd .;
Acid fluorescent red dye B
Fluorescent Red B-1: Rhodamine-based, provided by Archrom Kako (China) Co., Ltd .;
Fluorescent Red B-2: Benzopyran-based, provided by Zhejiang Ryusei Group Crotch Hung Co., Ltd.
(2) UV absorber
UV absorber-a: Organic benzotriazole type, provided by Nippon Meisei Chemical Industry Co., Ltd .;
UV absorber-b: Organic benzotriazine type, provided by NICCA CHEMICAL CO., LTD.;
UV absorber-c: Benzophenone-based, provided by Shanghai Lian Kako Co., Ltd.
(3) Fixing agent Synthetic tannic acid type, provided by Shanghai Daxiang Chemical Industry Co., Ltd., the pH value of the fixing liquid is 3 to 4.5.
Example 1
Weaving 78dtex-26f-nylon 6 (manufactured by Torei Synthetic Fiber Co., Ltd.) as vertical and horizontal yarn, put a raw machine with a vertical and horizontal density of 107 * 91 / inch into a dyeing machine, and 2% owf coumarin-based acidic fluorescence A- Uniformly mixed with a processing solution formed of 1 dye and 0.01% owf rhodamine-based acidic fluorescent red B-1 dye, kept warm at a bath ratio of 1:20 and 98 ° C. for 30 minutes, and then under normal conditions. Fix (synthetic tannic acid 2 g / L, heat retention at 80 ° C. for 30 minutes), washing with water, and finally drying and setting at 100 ° C. were performed. Next, a PU resin coating process was applied to one side to obtain a highly visible nylon fiber woven fabric of Example 1. Specific data are shown in Table 1.
Example 2
Weaving 78dtex-26f-nylon 6 (manufactured by Toray Synthetic Fiber Co., Ltd.) as vertical and horizontal yarn, put a raw machine with a vertical and horizontal density of 107 * 91 / inch into a dyeing machine, and 2% owf coumarin-based acidic fluorescence A-1. Uniformly mixed with a processing solution formed of dye, 0.01% owf rhodamine-based acidic fluorescent red B-1 dye and 3% owf benzotriazole-based UV absorber, and bathed at a bath ratio of 1:20 and 98 ° C. at 30 ° C. It was kept warm for 1 minute, then fixed (synthetic tannic acid 2 g / L, kept warm at 80 ° C. for 30 minutes) under normal conditions, washed with water, and finally dried and set at 100 ° C. Next, a PU resin coating process was applied to one side to obtain a highly visible nylon fiber woven fabric of Example 2. Specific data are shown in Table 1.
Example 3
After setting, the same procedure as in Example 2 was obtained except that the conventional laminating conditions were adopted and a PTFE resin film was laminated on one side to obtain a highly visible nylon fiber woven fabric of Example 3. Specific data are shown in Table 1.
Example 4
After the setting, the same procedure as in Example 2 was obtained except that the conventional laminating conditions were adopted and the PU resin film was laminated on one side to obtain the highly visible nylon fiber woven fabric of Example 4. Specific data are shown in Table 1.
Example 5
A high-visibility nylon fiber woven fabric of Example 5 was obtained in the same manner as in Example 1 except that a 3% owf benzotriazine-based UV absorber b was added to the processing liquid at the same time. Specific data are shown in Table 1.
Example 6
A high-visibility nylon fiber woven fabric of Example 6 was obtained in the same manner as in Example 1 except that a 3% owf benzophenone-based UV absorber c was added to the processing liquid at the same time. Specific data are shown in Table 1.
Example 7
A high-visibility nylon fiber woven fabric of Example 7 was obtained in the same manner as in Example 4 except that the amount of the acidic fluorescent yellow dye A-1 used was 5% owf. Specific data are shown in Table 1.
Example 8
A high-visibility nylon fiber woven fabric of Example 8 was obtained in the same manner as in Example 4 except that the amount of the acidic fluorescent red dye B-1 used was 0.004% owf. Specific data are shown in Table 1.
Example 9
A high-visibility nylon fiber woven fabric of Example 9 was obtained in the same manner as in Example 4 except that the amount of the acidic fluorescent red dye B-1 used was 0.03% owf. Specific data are shown in Table 1.
Example 10
A high-visibility nylon fiber woven fabric of Example 10 was obtained in the same manner as in Example 4 except that the amount of the UV absorber a used was 4.5% owf. Specific data are shown in Table 1.
Comparative Example 1
The high-visibility nylon fiber woven fabric of Comparative Example 1 was obtained in the same manner as in Example 2 except that the processing liquid was formed only with 2% owf acidic fluorescent yellow dye A-1 and 3% owf benzotriazole-based UV absorber a. Obtained. Specific data are shown in Table 2.
Comparative Example 2
The same as in Example 4 except that the acidic fluorescent yellow dye A-1 (coumarin type) was changed to the acidic fluorescent yellow dye A-2 (xanthene type) in the processing liquid, and the high visibility nylon fiber of Comparative Example 2 was used. Obtained a woven fabric. Specific data are shown in Table 2.
Comparative Example 3
The same as in Example 4 except that the acidic fluorescent red dye B-1 (rhodamine type) was changed to the acidic fluorescent red dye B-2 (benzopyran type) in the processing liquid, and the high visibility nylon fiber of Comparative Example 3 was used. Obtained a woven fabric. Specific data are shown in Table 2.

As described in Tables 1 and 2,
(1) Comparing Example 4 and Example 1, the woven fabric obtained by using the 3% owf organic UV absorber under the same conditions is compared with the woven fabric obtained without using the UV absorber. The coordinate values of the brightness and CIE chromaticity at the initial stage and after irradiation with a xenon lamp are at the same level, and the sweat fastness, washing fastness and thermal pressure fastness are also at the same level, and the former light fastness is It was a little better than the latter. After irradiation with carbon arc lamps, the former CIE chromaticity is also superior to the latter. The latter coordinate values were at the edge positions in the range defined by the JIS T 8127: 2015 standard.
(2) Comparing Example 3 and Example 2, under the same conditions, the woven fabric to which the PTFE resin film is attached has the washing fastness, light color fastness, and sweat resistance of both as compared with the woven fabric without the resin film. The fastness and heat-resistant pressure fastness are at the same level, and the brightness and CIE chromaticity coordinate values at the initial stage, after xenon lamp irradiation and after carbon arc lamp irradiation are also at the same level, but the former has a waterproof and breathable function. did.
(3) Comparing Example 5 and Example 6, the woven fabric obtained by using the benzotriazine-based organic UV absorber b under the same conditions was obtained by using the benzophenone-based organic UV absorber c. Compared with woven fabrics, both sweat fastness and thermal pressure fastness were at the same level, and the former light color fastness and wash fastness were slightly superior to the latter. The CIE chromaticity of the former after irradiation with a xenon lamp was also superior to that of the latter. The latter chromaticity coordinate value was at the edge position in the range defined by the JIS T 8127: 2015 standard.
(4) Comparing Example 7 and Example 4, the woven fabric obtained by dyeing with 5% owf acidic fluorescent yellow dye A-1 under the same conditions is 2% owf acidic fluorescent yellow dye A-1. Compared with the woven fabric obtained by dyeing using, the former has slightly lower sweat fastness, washing fastness, and heat pressure fastness than the latter, and the former has CIE chromaticity coordinates after carbon arc lamp irradiation. The value was at the edge position in the range defined by the JIS T 8127: 2015 standard.
(5) Comparing Example 4 and Example 10, the woven fabric obtained by using the 3% owf organic UV absorber under the same conditions was obtained by using the 4.5% owf organic UV absorber. Compared with the woven fabric, the heat-resistant pressure fastness and brightness of the former were superior to those of the latter. The CIE chromaticity after xenon lamp and carbon arc lamp irradiation is superior to the latter, and the latter has CIE chromaticity coordinate values after xenon lamp irradiation and carbon arc lamp irradiation as ISO 2047: 2013 standard or JIS T 8127: 2015 standard. It was in a defined range of edge positions.
(6) Comparing Comparative Example 1 and Example 2, the woven fabric obtained under the same conditions without using the acidic fluorescent red dye B-1 was 0.01% o. w. f. Compared with the woven fabric obtained by using the acidic fluorescent red dye B-1, the washing fastness, light fastness, sweat fastness, and heat pressure fastness of both were at the same level. In the early stage of the former, after the xenon lamp irradiation, the CIE chromaticity coordinate value after the carbon arc lamp irradiation was out of the range defined in the ISO 2047: 2013 standard or the JIS T 8127: 2015 standard.
(7) Comparing Comparative Example 2 and Example 4, the woven fabric obtained by using the xanthene-based acidic fluorescent yellow dye under the same conditions is compared with the woven fabric obtained by using the coumarin-based acidic fluorescent yellow dye. The former washing fastness, sweat fastness, and heat pressure fastness did not satisfy the ISO 2047: 2013 standard or the JIS T 8127: 2015 standard. In the former case, after the xenon lamp irradiation, the CIE chromaticity coordinate value after the carbon arc lamp irradiation was out of the range defined in the ISO 2047: 2013 standard or the JIS T 8127: 2015 standard.
(8) Comparing Comparative Example 3 and Example 4, the woven fabric obtained by using the benzopyran-based acidic fluorescent red dye was compared with the woven fabric obtained by using the rhodamine-based acidic fluorescent red dye under the same conditions. In the former, the washing fastness, light fastness, sweat fastness, and heat pressure fastness were at the same level, but in the former, the CIE chromaticity coordinate value after carbon arc lamp irradiation was set to JIS T 8127: 2015 standard. It was out of the range.

Claims (7)

A fluorescent yellow woven fabric or knitted fabric made of nylon fibers, which contains a coumarin-based acidic fluorescent yellow dye and a rhodamine-based acidic fluorescent red dye in the nylon fibers, and after irradiation with a xenon lamp in accordance with the ISO 20471: 2013 standard, or After carbon arc lamp irradiation or xenon lamp irradiation according to JIS T 8127: 2015 standard, CIE chromaticity coordinates (x, y) are (0.387, 0.610), (0.356, 0.494), A highly visible nylon fiber woven or knitted fabric having a minimum brightness value β of 0.70 or more within the ranges of (0.398, 0.452) and (0.460, 0.540). Initial CIE chromaticity coordinates (x, y) conforming to ISO 20471: 2013 standard or JIS T 8127: 2015 standard are (0.387, 0.610), (0.356, 0.494), (0.398). , 0.452) and (0.460, 0.540), the high-visibility nylon fiber woven knitted fabric according to claim 1, wherein the minimum luminance value β is 0.70 or more. The highly visible nylon fiber woven knit according to claim 1, wherein the nylon fiber contains an organic ultraviolet absorber. The organic ultraviolet absorber is a benzotriazole-based and / or a benzotriazine-based ultraviolet absorber, and the benzotriazole-based ultraviolet absorber is a compound having the structure of the following formula 1.

The benzotriazine-based ultraviolet absorber is a compound having the structure of the following formula 2.

In formula 2, R ₁ is an alkyl group of −H, C _1-6 , −OH, −OCH ₃ , −SCH ₃ or a substituent having the following structure.

R ₂ is a substituent having the following structure and has the following structure.

The highly visible nylon fiber woven or knitted fabric according to claim 3, wherein R _{3 is a substituent having the following structure.}

Discoloration and fading is 4th to 5th grade, contamination is 4th grade or higher, friction fastness is 4th grade or higher, sweat fastness is 4th grade or higher in washing fastness conforming to ISO 20471: 2013 standard or JIS T8127: 2015 standard. The highly visible nylon fiber woven knit according to any one of claims 1 to 4, wherein the heat-resistant pressure fastness is 4-5 grade or higher. The highly visible nylon fiber woven knit according to any one of claims 1 to 4, wherein a waterproof / breathable resin layer is attached to one side of the woven knit. High-visibility safety clothing using the high-visibility nylon fiber woven knit according to any one of claims 1 to 6.