JP4956313B2 - Internal total reflection type cube corner type retroreflective article - Google Patents

Description

The present invention relates to a novel fluorescent retroreflective sheet. More specifically, in a cube corner type retroreflective article having at least a surface protective layer, a cube corner type retroreflective element layer, and a binder layer, the surface protective layer, the retroreflective element layer, the holding layer, the binder layer, and the support layer. At least one of the layers is a colored layer colored with a fluorescent colorant, the resin constituting the colored layer is an acrylic resin, the light incident side as an upper layer, from the light incident side of the retroreflective article, among the colored layers It relates to a total internal reflection type cube-corner retroreflective article characterized in that the transmittance of the layer extending over the lowermost layer at a wavelength of 340 nm is 1% or less.

In particular, the present invention relates to signs such as road signs and construction signs, license plates for vehicles such as automobiles and motorcycles, safety materials such as clothing and life preservers, markings such as signs, visible light, laser light or infrared light. The present invention relates to a fluorescent internal total reflection type cube-corner retroreflective article that is useful in a reflection plate of a reflective sensor.

Conventionally, a retroreflective sheet that reflects incident light toward a light source is well known, and the sheet using the retroreflective property is widely used in the fields of use as described above.

In general, basic optical characteristics desired for a retroreflective sheet include high retroreflective characteristics at night, and three performances of observation angle characteristics, incident angle characteristics, and rotation angle characteristics are required.

In addition, it is also required that the brightness of the sheet is excellent during the day, and it is necessary that the visibility is good both during the day and at night.

Various improvements have been reported for the purpose of improving the visibility of the sheet in the daytime, and as one method, a fluorescent colorant is contained in any one of the layers constituting the retroreflective sheet to give a fluorescent appearance. Giving is generally done.

For example, Rowland US Pat. No. 3,830,682 (Patent Document 1) includes Rhodamine B Extra, Rhodamine 6DGN, Fluorol 7GN, Amaplast Orange LFP, etc. on the prism layer of a triangular pyramidal cube corner retroreflective sheet. It is described that a fluorescent retroreflective sheet having a clear color tone can be prepared by blending a fluorescent colorant.

In addition, in US Pat. No. 5,387,458 (Patent Document 2) of Paverka et al., A screen layer that is substantially transparent to visible light and absorbs ultraviolet rays, a thioindoid type, a thixanthene type, A fluorescent retroreflective sheet having a clear color tone composed of a triangular pyramidal cube-corner retroreflective element layer to which a benzoxazole coumarin-based or perylene-imide-based colorant is added is described.

U.S. Pat. No. 5,605,761 to Burns et al. (Patent Document 3) discloses a triangular pyramidal cube-corner retroreflective element layer having a Thioxanthone-based, Perylene-imide-based, or a Thioididoid-based fluorescent colorant and a hindered amine. A fluorescent retroreflective sheet having a clear color tone to which a light stabilizer is added is described.

US Pat. No. 5,672,643 issued to Burns et al. (Patent Document 4) discloses a specific structure of Peryleneimide fluorescent colorant and Lumogen F Yellow 083 in the reflective element layer of a cube-corner retroreflective sheet. CI Solvent Yellow 160: 1, CI Solvent Green4, CI Pigment Yellow 101, CI Solvent Yellow 131, CI Solvent Yellow 98, Orase Yellow 8GF, CI Solvent Green Y A fluorescent retroreflective sheet having a specific range of colors is described.

Furthermore, Wei et al., US Publication No. 2003 / 02032111A1, discloses a lower-layer colored fluorescent film having a first fluorescent colorant in a lower-layer polymer substrate, and an upper-layer polymer substrate. An upper colored fluorescent film having a second fluorescent colorant therein, wherein the upper colored fluorescent film has a higher UV stability than the lower colored film,
The article has the upper colored fluorescent film on the lower colored fluorescent film, and the article has a selected fluorescent hue that is different from both the lower colored fluorescent film and the upper colored fluorescent film. It is described that it has.

However, none of the fluorescent retroreflective sheets proposed in the above patents simultaneously satisfy both the excellent fluorescent appearance and the weather resistance for maintaining their fluorescent color.

U.S. Pat. No. 3,830,682 US Pat. No. 5,387,458 US Pat. No. 5,605,761 US Pat. No. 5,672,643 US Publication No. 2003 / 0202032A1 U.S. Pat. No. 3,190,178 US Pat. No. 4,025,159 Japanese public utility model Showa 50-02869

The problem to be solved by the present invention is to provide a retroreflective article that simultaneously satisfies both excellent fluorescent appearance and weather resistance for maintaining the fluorescent color.

Specific applications include signs such as road signs and construction signs, license plates for vehicles such as automobiles and motorcycles, safety materials such as clothing and life preservers, markings for signs, visible light, laser light or infrared An object of the present invention is to provide a fluorescent cube-corner retroreflective article that is useful in a reflector of a light-reflective sensor.

Hereinafter, specific means for solving the problems of the present invention will be described in detail.

The retroreflective article of the present invention is a cube corner retroreflective article having at least a surface protective layer, a cube corner type retroreflective element layer, and a binder layer. The surface protective layer, the retroreflective element layer, the holding layer, and the binder layer , At least one layer of the support layer is a colored layer colored with a fluorescent colorant, the resin constituting the colored layer is an acrylic resin, and from the light incident side of the retroreflective article, the lowest layer of the colored layers The total internal reflection type cube-corner retroreflective article is characterized in that the transmittance of the 340 nm wavelength of the extended layer is 1% or less.

Examples of the fluorescent colorant that can be used in the present invention include perylene, thioxanthene, benzoxazole coumarin, benzimidazole coumarin, thioindigoid, benzopyran, rhodamine, and the like. Fluorescent colorants are preferred. Examples of perylene fluorescent colorants include commercially available products such as Lumogen F Orange 240, Lumogen F Red 305, Lumogen F Yellow 083, and Lumogen F Yellow 170 manufactured by BASF.

Among the perylene fluorescent colorants, perylene monodicarboximide fluorescent colorants are particularly excellent in color development and weather resistance, and more preferable. As the perylene monodicarboximide fluorescent colorant, for example, a commercially available product of Lumogen F Yellow 170 manufactured by BASF can be exemplified.

In the retroreflective article of the present invention, the transmittance at a wavelength of 340 nm of the layer extending from the light incident side of the retroreflective article to the lowermost layer of the colored layer is 1% or less. It is preferable to block ultraviolet rays having a wavelength of 340 nm in order to improve the weather resistance of the resin and fluorescent colorant constituting the retroreflective article.

In order to improve such weather resistance, the transmittance at a wavelength of 340 nm is 1% or less, preferably 0.8% or less, more preferably 0.5% or less.

Examples of the ultraviolet absorber that absorbs light having a wavelength of 340 nm include benzotriazole, triazine, benzophenone, cyanoacrylate, hydroquinone, and the like. Among them, the resin is not colored and is compatible with the polymer. A cyanoacrylate-based ultraviolet absorber is preferred because of its superiority.

In the present invention, in order to further improve the weather resistance, it is preferable to use a plurality of types of ultraviolet absorbers in combination.

The combination of the ultraviolet absorbers is not particularly limited, and the above ultraviolet absorbers can be arbitrarily combined. However, when the resin constituting the retroreflective article is an acrylic resin or a polycarbonate system, cyanoacrylate It is preferable to combine a UV absorber with a triazine and a triazine UV absorber.

In the present invention, a combination of a cyanoacrylate ultraviolet absorber and a triazine ultraviolet absorber is preferable for improving the weather resistance of the fluorescent colorant.

In the present invention, an ultraviolet absorber may be used so that the transmittance at a wavelength of 340 nm is 1% or less, and the amount added is a layer extending from the light incident side of the retroreflective article to the lowest layer of the colored layers. Can be exemplified by 0.1 to 2% by weight.

In the present invention, when a cyanoacrylate ultraviolet absorber is used as the ultraviolet absorber, the addition amount is preferably 0.1 to 2% by weight. If the addition amount is less than 0.1% by weight, the ultraviolet rays cannot be sufficiently blocked, and the weather resistance of the retroreflective article is inferior. If the addition amount exceeds 2% by weight, the appearance of the retroreflective article may be adversely affected. is there. Moreover, when an ultraviolet absorber is added excessively, there exists a possibility of depositing on the surface of a retroreflection article and deteriorating retroreflection performance.

In the present invention, when the cyanoacrylate-based UV absorber and the triazine-based UV absorber are used in combination as the UV absorber, the addition amount of the cyanoacrylate-based UV absorber is 0.1 to 2% by weight, and the triazine-based UV absorber The addition amount of the absorbent is preferably 0.1 to 2% by weight.

Further, in the present invention, the transmittance of the 340 nm wavelength of the layer extending from the light incident side of the retroreflective article to the uppermost colored layer is 5% or less, with the light incident side as an upper layer in terms of improving the weather resistance of the colorant. It is preferable that

In the present invention, the amount of the fluorescent colorant contained in the retroreflective article is preferably 0.1 to 1.0% by weight. If it is less than 0.1% by weight, neither sufficient color development nor weather resistance can be obtained, and if it exceeds 1.0% by weight, the fluorescent feeling disappears due to quenching.

In the present invention, retroreflective articles are (0.427, 0.483), (0.465, 0.534), (0.557,
0.442) and (0.496, 0.414) are preferably within the range of chromaticity coordinates surrounded by four points. Within this range, an article with good visibility can be obtained, which is preferable.

Further, in the present invention, separately from the retroreflective article, a resin layer and / or an adhesive layer of a light-transmitting colored resin film composed of a resin layer and an adhesive layer is prepared by coloring with a fluorescent colorant, and the retroreflection A fluorescent retroreflective article is also preferably bonded to the reflective article.

The resin layer constituting the light-transmitting colored resin film of the present invention is not particularly limited as long as it has light-transmitting properties, excellent weather resistance, and uniform properties, but is colored with a fluorescent colorant. In this case, an acrylic resin is preferable in terms of color development and weather resistance.

The light-transmitting colored resin film of the present invention can color the resin layer and / or the pressure-sensitive adhesive layer with the above-mentioned fluorescent colorant. Among them, the perylene monodicarboximide-based fluorescent colorant has color development and weather resistance. This is preferable.

The resin layer and / or the pressure-sensitive adhesive layer of the light-transmitting colored resin film of the present invention preferably contains an ultraviolet absorber from the viewpoint of improving weather resistance. As the ultraviolet absorber, those described above can be used.

In the present invention, when the resin layer of the light-transmitting colored resin film is colored, it is preferable to contain an ultraviolet absorber in the resin layer, and in order to improve the weather resistance of the colorant, in particular, cyanoacrylate ultraviolet absorption It is preferable to use an agent and a triazine ultraviolet absorber in combination.

When coloring the pressure-sensitive adhesive layer of the colored resin film, it is preferable that a cyanoacrylate-based ultraviolet absorber and a triazine-based ultraviolet absorber are used in combination for improving the weather resistance of the colorant as a whole of the colored resin film. .

ADVANTAGE OF THE INVENTION According to this invention, the retroreflective article which satisfy | fills simultaneously both the outstanding fluorescent appearance and the weather resistance which maintains those fluorescent colors can be provided.

A preferred embodiment of the retroreflective article according to the present invention will be described below with reference to the drawings.

As a result of various studies on fluorescent dyes having both excellent fluorescent appearance that can be used for retroreflective sheets and weather resistance that maintains the fluorescent color for a long period of time, the present inventors have conducted retroreflective articles. It was found that the above-mentioned characteristics were improved by blocking the ultraviolet rays having a specific wavelength by using an acrylic resin colored with a fluorescent colorant as the resin constituting the resin, and the present invention was completed.

Thus, the present invention provides a cube-corner retroreflective article having at least a surface protective layer, a cube-corner retroreflective element layer, and a binder layer, the surface protective layer, the retroreflective element layer, the holder layer, the binder layer, and the support. At least one of the body layers is a colored layer colored with a fluorescent colorant, the resin constituting the colored layer is an acrylic resin, the light incident side is an upper layer, and the colored layer is formed from the light incident side of the retroreflective article. It is intended to provide a total internal reflection type cube corner retroreflective article characterized by having a transmittance of 340 nm wavelength of a layer over the lowermost layer of 1% or less.

Hereinafter, the retroreflective article of the present invention will be described in more detail.

The retroreflective article capable of imparting a fluorescent color according to the present invention is not particularly limited as long as it basically has the above-described configuration, and the present invention is applied to any retroreflective article known per se. be able to.

The retroreflective article of the present invention will be described with reference to FIG. 1, which is a cross-sectional view, of an embodiment of a suitable structure of a cube-corner retroreflective article.

In FIG. 1, (4) is a retroreflective element layer in which the cube corner retroreflective elements of the present invention are arranged in a close-packed manner, (3) is a holding layer that holds the retroreflective element layer, and 11 is a light layer. Is the incident direction. The retroreflective element layer (4) and the holder layer (3) are usually integrated (5), but separate layers may be laminated. In accordance with the purpose and environment of use of the retroreflective article in the present invention, the surface protective layer (1), the information transmission to the observer, the printed layer (2) for coloring the article, moisture etc. on the back surface of the reflective element layer Affixing a binder layer (7) for achieving an encapsulated sealing structure that prevents intrusion, a support layer (8) that supports the binder layer (7), and a retroreflective article to other structures The adhesive layer (9) and the release material layer (10) can be provided.

The printed layer (2) is usually placed between the surface protective layer (1) and the support layer (3), or on the surface protective layer (1) or on the reflective surface of the retroreflective element layer (4). It can be installed by means such as gravure printing, screen printing and ink jet printing.

The material constituting the retroreflective element layer (4) and the holding body layer (3) is not particularly limited as long as it has optical transparency, excellent weather resistance, and uniform properties. Examples of materials that can be used in the present invention include polycarbonate resins, vinyl chloride resins, (meth) acrylic resins, epoxy resins, styrene resins, polyester resins, fluororesins, olefin resins such as polyethylene resins and polypropylene resins, and cellulose resins. And urethane resin. Further, for the purpose of improving the weather resistance, an ultraviolet absorber, a light stabilizer, an antioxidant and the like can be used alone or in combination. Furthermore, various organic pigments, inorganic pigments, fluorescent pigments and dyes, fluorescent dyes and the like as colorants can be contained.

The same resin as that used for the retroreflective element layer (4) can be used for the surface protective layer (1), but for the purpose of improving the weather resistance, an ultraviolet absorber, a light stabilizer, an antioxidant and the like are respectively used. It can be used alone or in combination. Furthermore, various organic pigments, inorganic pigments, fluorescent pigments and dyes, fluorescent dyes and the like as colorants can be contained.

The retroreflective element layer (4) in the present invention is generally provided with an air layer (6) on the back of the composite cube corner retroreflective element for the purpose of increasing the critical angle satisfying the total internal reflection condition. The retroreflective element layer (4) and the support layer (8) are hermetically sealed by a binder layer (7) in order to prevent problems such as a decrease in critical angle and corrosion of the metal layer due to intrusion of moisture and the like under operating conditions. Preferably it is encapsulated.

Examples of the sealing and sealing method include US Pat. Nos. 3,190,178 (Patent Document 6), 4,025,159 (Patent Document 7), Japanese Published Utility Model Showa 50-28669 (Patent Document 8), and the like. The method shown in can be adopted. Examples of the resin used for the binder layer (7) include (meth) acrylic resin, polyester resin, alkyd resin, epoxy resin, and the like. A combination method, an ultraviolet curable resin bonding method, an electron beam curable resin bonding method, or the like can be appropriately employed.

The binder layer (7) used in the present invention can be applied over the entire surface of the support layer (8), and can also be selectively placed on the bonding portion with the retroreflective element layer by a printing method or the like. In the present invention, the binder layer can be colored with a fluorescent colorant to form a fluorescent color layer, and it is preferable that the binder is colored on the lower layer side than the retroreflective element layer in terms of improving the weather resistance of the colorant.

Examples of the material constituting the support layer (8) used in the present invention include a resin constituting the retroreflective element layer, a general film-formable resin, fiber, cloth, metal foil or plate such as stainless steel or aluminum. Each can be used alone or in combination. In the present invention, the support layer can be colored with a fluorescent colorant to form a fluorescent color layer, and it is preferable that the support layer is colored on the lower layer side than the retroreflective element layer in terms of improving the weather resistance of the colorant.

In the present invention, the binder layer and the support layer can contain an additive such as an ultraviolet absorber, and it is preferable to block ultraviolet rays in order to improve weather resistance.

In the present invention, at least one of the above layers is colored with a fluorescent colorant, and the resin constituting the colored layer may be an acrylic resin. For example, the surface protective layer is colored with a fluorescent colorant. If the resin constituting the surface protective layer is an acrylic resin, the retroreflective element layer is colored with a fluorescent colorant, and the resin constituting the retroreflective element layer is a resin other than an acrylic resin. However, in the present invention, when a plurality of fluorescent colored layers are provided, it is preferable that all of the resins constituting the fluorescent colored layer are acrylic resins.

In the present invention, when the surface protective layer and the retroreflective element layer are colored with a fluorescent colorant to form a colored layer, a light-transmitting colored layer may be used to obtain good reflectivity as a retroreflective article. Although necessary, when the binder layer and / or the support layer are colored layers, they may not be light transmissive.

The adhesive layer (9) used for attaching the retroreflective sheet and the retroreflective object of the present invention to a metal plate, a wooden plate, a glass plate, a plastic plate and the like, and a release layer (10) for the adhesive are appropriately known. Can choose. As the adhesive, a pressure-sensitive adhesive, a heat-sensitive adhesive, a cross-linking adhesive, and the like can be appropriately selected.

Pressure sensitive adhesives such as butyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, nonyl acrylate and other acrylic esters and silicone resin adhesives obtained by copolymerizing acrylic esters with acrylic acid, vinyl acetate, etc. A rubber-based pressure-sensitive adhesive can be used. As the heat-sensitive adhesive, acrylic resin, polyester resin, epoxy resin, or the like can be used.

2, (1) to (10) are retroreflective articles as described above, (14) is a light-transmitting colored resin film of the present invention, (12) is a light-transmitting resin layer, (13) Is a light-transmitting pressure-sensitive adhesive layer.

The material constituting the resin layer (12) is not particularly limited as long as it has optical transparency, excellent weather resistance, and uniform properties. Examples of materials that can be used in the present invention include polycarbonate resins, vinyl chloride resins, (meth) acrylic resins, epoxy resins, styrene resins, polyester resins, fluororesins, olefin resins such as polyethylene resins and polypropylene resins, and cellulose resins. And urethane resin. Further, for the purpose of improving the weather resistance, an ultraviolet absorber, a light stabilizer, an antioxidant and the like can be used alone or in combination. Furthermore, various organic pigments, inorganic pigments, fluorescent pigments and dyes, fluorescent dyes and the like as colorants can be contained.
The resin layer (12) does not have to be a single layer, and the same or different materials may be laminated.

The material constituting the pressure-sensitive adhesive layer (13) is particularly suitable as long as it is light transmissive and excellent in weather resistance, and suitable for being attached to a metal plate, a wooden plate, a glass plate, a plastic plate, a plastic sheet or the like. It is not limited. Examples of materials that can be used in the present invention include acrylic resins, epoxy resins, polyester resins, fluororesins, and urethane resins. Further, for the purpose of improving the weather resistance, an ultraviolet absorber, a light stabilizer, an antioxidant and the like can be used alone or in combination. Furthermore, various organic pigments, inorganic pigments, fluorescent pigments and dyes, fluorescent dyes and the like as colorants can be contained.

In the present invention, at least one of the resin layer (12) and the pressure-sensitive adhesive layer (13) may be colored with a fluorescent colorant, and both may be colored.

Example 1

The perylene dye BASF fluorescent dye Lumogen F Yellow 170 0.3 parts by weight, 100% by weight of acrylic film “Acryprene HBL002” acrylic film manufactured by Mitsubishi Rayon Co., Ltd., Ciba Specialty Chemicals Tinuvin 1577, a triazine UV absorber Add 0.5 parts by weight of BASF's ubinal 3030, a cyanoacrylate UV absorber, and add 100 parts by using a high-speed rotary mixer and Henschel Kimiser made by Mitsui Mining Co., Ltd. For 15 minutes. After drying the colored pellets at 80 ° C. for 12 hours, an extrusion temperature of 200 was used using a single screw extruder provided with a screw having a screw length to aperture ratio of 30: 1 and a compression ratio of 3.0. Extrusion was performed at a temperature of 50 ° C. and a rotation speed of 50 rpm to obtain a fluorescent colored acrylic resin sheet having a thickness of 200 μm.
A 200 μm-thick fluorescent colored acrylic resin film is laminated on the surface of a bisphenol-type polycarbonate resin sheet “Iupilon FE2000URI” manufactured by Mitsubishi Engineering Plastics Co., Ltd. using a pair of 200 ° C. hot rolls, and then polycarbonate. Using a mold having a triangular pyramid retroreflective element on the surface so that the resin is in contact with the mold surface, compression molding is performed at a molding temperature of 200 ° C. and a molding pressure of 50 kg / cm 2, and 30 ° C. under pressure. The resin sheet was taken out after cooling to obtain a retroreflective element layer in which a large number of triangular pyramid retroreflective elements were arranged in a close-packed manner on the surface.

On the other hand, a polyester resin-based hot melt adhesive “Byron RN9300” manufactured by Toyobo Co., Ltd. is applied to a white polyethylene terephthalate film having a thickness of 38 μm manufactured by Teijin Limited to a thickness of 35 μm by an extrusion method. A support layer film was prepared.

The triangular-pyramidal cube-corner retroreflective element layer and binder-laminated support layer film are passed between a mold roll having a net-like projection and a silicon roll to provide a hermetically sealed structure and sealed sealed recursive A reflective sheet was created.

Example 2

In the same manner as in Example 1, a fluorescent colored acrylic resin sheet having only a thickness changed to 100 μm was prepared. Further, this sheet was bonded to a release film “PET7511” manufactured by Lintec Corporation so that an acrylic adhesive using “SK Dyne 1309X” manufactured by Soken Chemical Co., Ltd. was applied to a thickness of 40 μm. A light-transmitting colored resin film was also produced.

A sealed encapsulated retroreflective sheet was produced in the same manner as in Example 1 except that the fluorescent colored acrylic resin sheet having a thickness of 100 μm was used. Furthermore, the light-transmitting colored resin film was bonded to the light incident side of the obtained retroreflective sheet while peeling the release film, and used for evaluation.

Comparative Example 1

A sealed encapsulated fluorescent cube corner retroreflective sheet was obtained in the same manner as in Example 1 except that a fluorescent colored acrylic resin sheet was prepared without adding an ultraviolet absorber.

Comparative Example 2

Except that 0.05 parts by weight of Tinuvin 1577 manufactured by Ciba Specialty Chemicals and 0.05 parts by weight of BASF Ubinal 3030 which is a cyanoacrylate ultraviolet absorber were added to prepare a fluorescent colored acrylic resin sheet. The sealed encapsulated fluorescent cube corner retroreflective sheet was obtained by this method.

The hue and weather resistance of the sealed encapsulated fluorescent cube corner retroreflective sheets of Examples and Comparative Examples were compared by the following methods.
<Measuring Method of Reflection Spectrum> Using SE2000 manufactured by Nippon Denshoku Co., Ltd., an incident angle of 45 degrees and a light receiving angle of 0 degrees were measured under D65 light source conditions.
<Measurement of hue> From the above reflection spectrum, tristimulus values (X, Y, Z) and chromaticity coordinates (x , Y). At this time, standard light D65 and a viewing angle of 2 degrees were adopted.
<Evaluation of weather resistance> Using an Atlas weatherometer Ci65A manufactured by Toyo Seiki Seisakusho Co., Ltd. equipped with a 6.5 kw xenon lamp, the evaluation sample was exposed for 2000 hours, and the color measurement before and after the test was visually observed. The following stage evaluation was performed. Chromaticity coordinates measured after 1000 hours exposure and 2000 hours exposure treatment before testing were plotted.
<Appearance evaluation>
Appearance was evaluated visually with the following criteria for fluorescence.
○ There is enough fluorescence △ Fluorescence is felt × Fluorescence is not felt

The transmittance | permeability of the fluorescence coloring acrylic resin sheet of an Example and a comparative example was measured with the following method, and the relationship between the transmittance | permeability and a weather resistance was confirmed.
(Measurement method of transmission spectrum) Using a spectrophotometer U-4000 manufactured by Hitachi, Ltd., photometry method Double beam direct ratio photometry method, measurement mode Transmitted in the wavelength range of 250 to 400 nm by setting the transmittance (%) The spectrum was measured.

Figure 1 shows the transmission spectrum of the fluorescent colored acrylic resin sheet.

[Figure 1]

The transmittance at 340, 370 and 400 nm is shown in Table 1. (% T)

Figure 2 shows the evaluation results of weather resistance.

[Figure 2]

The evaluation results of the fluorescent appearance are shown in Table 2.

Sectional view of the retroreflective article of the present invention Sectional view of the retroreflective article of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface protective layer 2 Print layer 3 Holding body layer 4 Reflective element layer 5 Holding body layer + reflective element layer 6 Air layer 7 Binder layer 8 Support body layer 9 Adhesive layer 10 Release agent layer 11 Incident light 12 Resin layer 13 Adhesion Agent Layer 14 Light-Transparent Colored Resin Film

Claims (6)

In an internal total reflection type cube corner type retroreflective article having at least a surface protective layer, a cube corner type retroreflective element layer, and a binder layer, the resin constituting the surface protective layer is an acrylic resin, and the surface protective layer is a perylene monolith. It contains a carboximide fluorescent coloring agent, a cyanoacrylate ultraviolet absorber and a triazine ultraviolet absorber, the addition amount of the cyanoacrylate ultraviolet absorber is 0.1 to 2% by weight, and the addition amount of the triazine ultraviolet absorber is 0. A total internal reflection type cube corner type retroreflective article characterized by being 1 to 2 % by weight . The addition amount of the perylene monodicarboximide fluorescent colorant contained in the retroreflective article is 0. 1 to 1. The total internal reflection type cube corner type retroreflective article according to claim 1 , wherein the total internal reflection type cube corner type retroreflective article is 0 wt%. The retroreflective article is (0.427, 0.483), (0.465, 0.534),
The total internal reflection type cube-corner retroreflective article according to claim 1 or 2 , which is within a range of chromaticity coordinates surrounded by four points of (0.557,0.442) and (0.496, 0.414). In a light-transmitting colored resin film comprising a light-transmitting resin layer and an adhesive layer, the resin layer is an acrylic resin, and the resin layer is a perylene monodicarboximide fluorescent colorant, a cyanoacrylate UV absorber, and a triazine Light transmittance comprising an ultraviolet absorber, wherein the addition amount of a cyanoacrylate ultraviolet absorber is 0.1 to 2% by weight, and the addition amount of a triazine ultraviolet absorber is 0.1 to 2% by weight Colored resin film. A fluorescent retroreflective article, wherein the light transmissive colored resin film according to claim 4 is laminated on a retroreflective sheet. The fluorescent retroreflective article according to claim 5 is (0.427,
0.483), (0.465, 0.534), (0.557, 0.442), (0.496, 0.414) A total internal reflection type cube corner type retroreflective article characterized by being within the range of chromaticity coordinates surrounded by four points.