WO2014010555A1

WO2014010555A1 - Fluorescent complex

Info

Publication number: WO2014010555A1
Application number: PCT/JP2013/068642
Authority: WO
Inventors: 成教田村
Original assignee: 中興化成工業株式会社
Priority date: 2012-07-09
Filing date: 2013-07-08
Publication date: 2014-01-16
Also published as: JP5972077B2; CN104428393B; JP2014015539A; CN104428393A

Abstract

Provided is a fluorescent complex characterized in containing: a core (1) containing a heat-resistant woven fabric (1a) and a fluororesin layer (1b) formed on both sides of the heat-resistant woven fabric (1a); and a fluorescent material layer (2) containing a fluorescent material and polytetrafluoroethylene resin.

Description

Fluorescent complex

The present invention relates to a fluorescent complex.

Developed film materials for optical ceilings in membrane structures such as medium and large tents. This optical ceiling membrane material does not require power when it is turned off or during a sudden power outage, and the membrane material itself emits light, temporarily replacing lighting, avoiding confusion, It can be a signpost.

For example, Patent Document 1 discloses a core formed of a fiber material, a white resin layer formed on at least one surface thereof, a phosphorescent fluorescent resin layer formed on the white resin layer, and a phosphorescent fluorescent resin layer. A phosphorescent phosphor film material having a photocatalyst layer formed thereon is disclosed. The total light transmittance defined in JIS K7105 of the phosphorescent phosphor film material of Patent Document 1 is 50% or more. In addition, a thermoplastic resin such as vinyl chloride resin is used for the phosphorescent fluorescent resin layer.

On the other hand, Patent Document 2 discloses obtaining a nonflammable optical ceiling film material that conforms to the cone calorimeter test (ASTM-E1354). This optical ceiling film material contains phosphorescent phosphors containing 20 to 60% by mass of a phosphorescent phosphor material on the surface of a fiber fabric made of glass fiber yarns, silica fiber yarns, and mixed fiber yarns thereof. The laminate is provided with a resin layer and has a visible light transmittance (JIS Z8722) of 20 to 60%. Further, a thermoplastic resin such as vinyl chloride resin is used for the phosphorescent fluorescent resin layer of Patent Document 2.

Demand for further improvement in weather resistance is required for optical ceiling membrane materials.

JP 2008-12901 A JP 2009-263606 A

An object of the embodiment is to provide a fluorescent composite having excellent weather resistance.

According to the embodiment, a core including a heat resistant woven fabric and a fluororesin layer formed on both surfaces of the heat resistant woven fabric,
A phosphor composite comprising a phosphor and a phosphor layer containing an ethylene tetrafluoride resin is provided.

According to the embodiment, a fluorescent composite having excellent weather resistance can be provided.

It is sectional drawing which shows the fluorescence composite_body | complex which concerns on embodiment. It is sectional drawing which shows the fluorescence composite_body | complex which concerns on embodiment. It is sectional drawing which shows the fluorescence composite_body | complex which concerns on embodiment. It is sectional drawing which shows the fluorescence composite_body | complex which concerns on embodiment. It is sectional drawing which shows the fluorescence composite_body | complex which concerns on embodiment. It is sectional drawing which shows the fluorescence composite_body | complex which concerns on embodiment. 6 is a cross-sectional view showing a fluorescent composite of Comparative Example 1. FIG. 6 is a cross-sectional view showing a fluorescent composite of Comparative Example 2. FIG. 6 is a cross-sectional view showing a fluorescent composite of Comparative Example 3. FIG.

Hereinafter, embodiments of the present invention will be described in detail.

According to the embodiment, a fluorescent composite including a core and a phosphor layer is provided. The core includes a heat resistant woven fabric and a fluororesin layer formed on both surfaces of the heat resistant woven fabric. The phosphor layer includes phosphor particles and tetrafluoroethylene resin (PTFE). When the present inventors have mixed vinyl chloride resin with phosphor particles, although excellent transparency is obtained, phosphor particles are easily deteriorated by moisture, while PTFE is used instead of vinyl chloride resin as phosphor particles. When mixed with PTFE, the PTFE coats the phosphor particles and prevents contact between the phosphor particles and water, so that the water resistance of the phosphor layer is increased and the hydrolysis of the phosphor particles is suppressed. It was. Moreover, since this fluorescent substance layer is excellent in a phase meltability with the fluororesin layer of a core, the integrated intensity | strength of a fluorescent composite can be raised. From the above, according to the embodiment, the weather resistance of the fluorescent composite can be improved.

The fluorescent complex of the embodiment will be described with reference to the drawings. As shown in FIG. 1, the fluorescent composite according to the embodiment includes a core 1, a phosphor layer 2 formed on one surface of the core 1, and a first formed on the other surface of the core 1. Protective layer 3 _1, and second protective layer 3 ₂ formed on phosphor layer 2. The core 1 includes a heat resistant woven fabric 1a and a fluororesin layer 1b formed on both surfaces of the heat resistant woven fabric 1a. Moreover, the fluorescent substance layer 2 contains fluorescent substance and tetrafluoroethylene resin. These members constituting the fluorescent composite will be described.

1) Core body Examples of the heat-resistant woven fabric include those containing at least one selected from the group consisting of glass fiber, carbon fiber, ceramic fiber, aramid fiber and metal fiber. These fibers are preferably long fibers. Here, the long fiber can be used as a yarn without spinning. Preferred as the heat resistant woven fabric is one containing glass fibers.

The woven structure of the heat resistant woven fabric can be a satin weave, a plain weave, a basket weave, a twill weave, or a modified twill weave.

Examples of the fluororesin contained in the fluororesin layer include a tetrafluoroethylene resin (PTFE) that does not exhibit fluidity when melted, and a melt flowable fluororesin (for example, a tetrafluoroethylene perfluoroalkyl vinyl ether copolymer resin). (PFA), ethylene tetrafluoride-propylene hexafluoride copolymer resin (FEP)). The kind of fluororesin to be used can be 1 type or 2 types or more. Since the fluororesin layer containing PTFE has water repellency, it can suppress the intrusion of moisture into the phosphor particles, and can improve the phase meltability with the phosphor layer.

The fluororesin layer is formed by the following method, for example. First, an aqueous suspension containing fluororesin particles having a particle size of 0.1 to 0.4 μm and a suspension stabilizer (for example, an anionic surfactant or a nonionic surfactant) is used as a solvent. After being applied to both sides of the cloth by impregnation and drying at an ambient temperature of 100 ° C. or higher and 200 ° C. or lower, firing is performed at an ambient temperature of 330 ° C. or higher and 400 ° C. or lower. By repeating this coating, drying and baking a plurality of times, a fluororesin layer is obtained.

2) Phosphor layer The phosphor is not particularly limited, and examples thereof include a phosphorescent phosphor (long afterglow phosphor). Examples of the phosphorescent phosphor include a sulfide, an oxysulfide, and an oxide (for example, aluminate). Examples of sulfides include CaSrS: Bi (light emission color is blue), ZnS: Cu (light emission color is yellow-green), ZnS: Cu, Co (light emission color is yellow-green), CaS: Eu, Tm (light emission color is Red) etc. are included. Examples of oxysulfides include Y ₂ O ₂ S: Eu, Mg, Ti (the emission color is yellow brown or red). Examples of aluminates include CaAl ₂ O ₄ : Eu, Nd (the emission color is purple-blue), Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy (the emission color is blue-green), SrAl ₂ O ₄ : Eu, Dy (Emission color is yellow-green), SrAl ₂ O ₄ : Eu (emission color is yellow-green), a compound having a composition represented by the following formula (1) (emission color is green), and the like.

M _1-X Al ₂ O _4-X (1)
However, M is obtained by using as a mother crystal a compound comprising at least one metal element selected from the group consisting of Ca, Sr and Ba. X is in the range of −0.33 ≦ X ≦ 0.60. In the compound having the composition represented by the formula (1), Eu as an activator is added in an amount of 0.001% or more and 10% or less in terms of mol% with respect to the metal element represented by M. Further, in the compound having the composition represented by the formula (1), at least one element of the group consisting of Nd, Sm, Dy, Ho, Er, Tm, Yb and Lu as a coactivator is a metal represented by M. 0.001% or more and 10% or less is added in mol% with respect to the element.

The kind of fluorescent substance to be used can be made into one type or two types or more. Oxide phosphor particles such as M _1-X Al ₂ O _4-X are excellent in dispersibility with respect to the PTFE aqueous suspension, and therefore can be uniformly dispersed in the phosphor layer.

The content of the phosphor particles in the phosphor layer is preferably in the range of 10 wt% to 25 wt%. Sufficient luminance can be obtained by setting the content of the phosphor particles to 10% by weight or more. In addition, by making the content of the phosphor particles 25% by weight or less, stress concentration in the vicinity of the phosphor particles due to bending can be reduced, and a decrease in bending strength can be suppressed. It is possible to avoid the occurrence of cracks or the like in the fluorescent composite when deformation such as bending is applied.

The phosphor layer may contain components other than phosphor particles and ethylene tetrafluoride resin. When the phosphor layer is composed of phosphor particles and ethylene tetrafluoride resin, the content of the ethylene tetrafluoride resin in the phosphor layer is preferably in the range of 75 wt% to 90 wt%.

The phosphor layer is formed by the following method, for example. First, water is used as a dispersion liquid, and phosphor particles are dispersed in an aqueous suspension containing PTFE particles and a suspension stabilizer (for example, an anionic surfactant or a nonionic surfactant). The obtained dispersion is applied by impregnation on at least one surface of a substrate (for example, a fluororesin layer or a protective layer of a core), dried at an ambient temperature of 100 ° C. or higher and 200 ° C. or lower, and then the ambient temperature is 330 ° C. Firing is performed at 400 ° C. or lower. A phosphor layer is obtained by repeating this coating, drying, and baking a plurality of times. According to this method, a phosphor layer is obtained by repeating the steps of applying a suspension in which phosphor particles are uniformly dispersed to a substrate, drying, and firing. Thus, a phosphor layer in which the dispersibility of the phosphor layer is maintained as it is can be realized, and sufficient luminance can be obtained even if the phosphor particle content in the phosphor layer is small. As a result, stress concentration in the vicinity of the phosphor particles due to bending can be reduced, and a decrease in bending strength can be suppressed. Therefore, when the fluorescent composite is subjected to deformation such as bending, cracks etc. Can be avoided. In particular, particles of oxide phosphors such as M _1-X Al ₂ O _4-X have excellent dispersibility in PTFE aqueous suspensions. A phosphor layer in which particles are uniformly dispersed can be realized.

The larger the average particle diameter of the phosphor particles, the higher the afterglow brightness, but the phosphor particles tend to settle in the suspension, and the mechanical strength of the phosphor layer tends to decrease. On the other hand, the smaller the average particle diameter of the phosphor particles, the better the dispersibility in the suspension and the mechanical strength of the phosphor layer, but the afterglow brightness tends to be low.

3) Protective layer The protective layer contains a melt-flowable fluororesin. As will be described later, the phosphor layer is a kind of sintered body because it is obtained by repeating the steps of applying a PTFE aqueous suspension to a substrate, drying, and firing. For this reason, water may enter the inside through the pinhole of the sintered body, and the phosphor particles may be hydrolyzed. Since the protective layer contains a melt-flowable fluororesin, it is a highly dense molded body, and therefore it is possible to suppress the intrusion of moisture into the phosphor layer. The arrangement of the protective layer is not particularly limited, but it is desirable that the protective layer is arranged on at least one surface of the phosphor layer or positioned on the outermost layer. Thereby, the weather resistance of the fluorescent composite can be further improved.

Fluorine resin other than tetrafluoroethylene resin (PTFE) can be used for the melt flowable fluororesin. Preferred examples include ethylene tetrafluoride-hexafluoropropylene copolymer resin (FEP), tetrafluoroethylene perfluoroalkyl vinyl ether copolymer resin (PFA), polyvinylidene fluoride (PVDF), and ethylene tetrafluoride ethylene copolymer. Polymerized resin (ETFE) is included. FEP and PFA are excellent in phase meltability with PTFE, and FEP can keep the production cost of the fluorescent composite low. The type of the melt flowable fluororesin used can be one type or two or more types.

The protective layer is formed by the following method, for example. First, an aqueous suspension containing a melt-flowable fluororesin and a suspension stabilizer (for example, an anionic surfactant or a nonionic surfactant) is provided on at least one surface of a substrate (for example, a core or a phosphor layer). After applying by impregnation and drying at an ambient temperature of 100 ° C. to 200 ° C., firing is performed at an ambient temperature of 300 ° C. to 400 ° C. A protective layer is obtained by repeating this coating, drying and baking a plurality of times.

The laminated structure of the fluorescent composite is not limited to that shown in FIG. 1, and any structure including a fluorescent layer and a core may be used. Specific examples are shown in FIGS.

As illustrated in FIG. 2, instead of arranging the first protective layer 3 ₁ to the outermost layer may be disposed between the fluororesin layer 1b of the phosphor layer 2 and the core 1. Further, as illustrated in FIG. 3, three protective layers are provided, the first and second protective layers 3 ₁ and 3 ₂ are disposed on the outermost layers of both of the fluorescent composites, and the phosphor layer 2 and between the fluororesin layer 1b of the core body 1 may be a third protective layer 3 ₃ is arranged.

The number of phosphor layers is not limited to one, and can be two or more, for example. Examples of this are shown in FIGS. As shown in FIG. 4, first and

second phosphor layers

2 ₁ and 2 ₂ are laminated on both fluororesin layers 1b of the core body ₁ , and the first and second protective layers 3 ₁ are further formed on the outer sides thereof. , 3 ₂ may be arranged. Further, as shown in FIG. 5, third or placing a protective layer 3 ₃ between the first phosphor layer 2 ₁ and the core 1 of the fluororesin layer 1b, as shown in FIG. 6, the second the third protective layer 3 ₃ may be disposed between the phosphor layer 2 ₂ and core 1 of the fluororesin layer 1b.

The fluorescent composite is allowed to include layers other than the core, the phosphor layer, and the protective layer (for example, a light diffusion layer and an antifouling layer).

The fluorescent complex has a visible light transmittance of less than 20% as defined in JIS Z8722.

Fluorescent composite applications include membrane structures such as medium and large tents, and examples include membrane materials for optical ceilings for evacuation guidance during disaster prevention in dome-type stadiums. When using fluorescent composites in concert halls and multipurpose halls that place emphasis on design such as decoration, phosphors other than phosphorescent phosphors (long-afterglow phosphors) (for example, black light) Can be provided in the fluorescent composite. In addition, when a phosphorescent phosphor (long afterglow phosphor) is used, a function for adjusting the afterglow time can be provided in the fluorescent composite.

Hereinafter, embodiments will be described with reference to the drawings.

(Example 1)
A glass fiber woven fabric (manufactured by Nitto Boseki) with a thickness of 450 μm as a heat-resistant woven fabric and a woven structure made by Nitto Boseki. It was applied by impregnating with a tetrafluoroethylene resin fine particle aqueous dispersion (made by Daikin Industries) consisting of 6% by weight of the agent and 34% by weight of water, and dried for 5 minutes in a sealed oven with the atmospheric temperature adjusted to 100 ° C. After the moisture was blown off, the substrate was baked for 5 minutes in a sealed furnace whose atmospheric temperature was adjusted to 360 ° C. By repeating this step a plurality of times, a core body was obtained by obtaining an ethylene tetrafluoride ethylene resin layer having a total thickness of both surfaces of 130 μm.

Next, 1.58 kg of a tetrafluoroethylene resin fine particle aqueous dispersion (made by Daikin Industries) consisting of 60% by weight of the tetrafluoroethylene resin fine particle, 6% by weight of the nonionic surfactant and 34% by weight of water. On the other hand, 50 g of strontium aluminate phosphorescent phosphor (manufactured by Nemoto Special Chemical) represented by SrAl ₂ O ₄ : Eu, Dy is mixed and stirred, and the tetrafluoroethylene resin fine particles are mixed with phosphorescent phosphor powder. An aqueous dispersion was prepared. The mixing ratio of the phosphorescent phosphor powder at this time is 5% by weight with respect to 95% by weight of the tetrafluoroethylene resin fine particles. Next, a phosphor layer having a thickness of 200 μm was formed on one of the tetrafluoroethylene resin layers of the core by applying, drying and firing under the same production conditions as the above-described tetrafluoroethylene resin layer.

Further, ethylene tetrafluoride-hexafluoropropylene copolymer resin fine particle content 54% by weight, nonionic surfactant 15.5% by weight and water 40.5% by weight ethylene tetrafluoride-hexafluoropropylene A protective layer having a thickness of 20 μm is formed on the phosphor layer and the other tetrafluoroethylene resin layer of the core body by coating, drying and firing under the same production conditions as above using a copolymer resin fine particle aqueous dispersion (manufactured by Dupont). (Outermost layer) was formed. The obtained fluorescent composite had the laminated structure shown in FIG. The visible light transmittance of the obtained fluorescent composite as defined in JIS Z8722 was less than 20%.

(Example 2)
A core body was produced in the same manner as in Example 1.

Next, strontium aluminate-based phosphorescent phosphor powder having the same composition as that of Example 1 was applied to 1.5 kg of an ethylene tetrafluoride resin fine particle aqueous dispersion (manufactured by Daikin Industries) having the same composition as that of Example 1. 100 g of the mixture was mixed and stirred to prepare an aqueous dispersion of ethylene tetrafluoride resin fine particles mixed with phosphorescent phosphor powder. The mixing ratio of the phosphorescent phosphor powder at this time is 10% by weight with respect to 90% by weight of the tetrafluoroethylene resin fine particles. Next, a phosphor layer having a thickness of 200 μm was obtained on one of the tetrafluoroethylene resin layers of the core by application, drying and firing under the same production conditions as in Example 1.

Further, the phosphor layer and the tetrafluoroethylene-hexafluoropropylene copolymer resin fine particle aqueous dispersion (manufactured by Dupont) having the same composition as in Example 1 were coated, dried and fired under the same production conditions as above. A protective layer (outermost layer) having a thickness of 20 μm was obtained on the other tetrafluoroethylene resin layer of the core. The obtained fluorescent composite had the laminated structure shown in FIG. The visible light transmittance of the obtained fluorescent composite as defined in JIS Z8722 was less than 20%.

(Example 3)
A core body was produced in the same manner as in Example 1.

Next, a strontium aluminate-based phosphorescent phosphor powder having the same composition as that of Example 1 was applied to 1.33 kg of an ethylene tetrafluoride resin fine particle aqueous dispersion (made by Daikin Industries) having the same composition as that of Example 1. An aqueous dispersion of fine tetrafluoroethylene resin particles mixed with 200 g of phosphorescent phosphor powder was prepared by mixing and stirring. The mixing ratio of the phosphorescent phosphor powder at this time is 20% by weight with respect to 80% by weight of the tetrafluoroethylene resin fine particles. Next, a phosphor layer having a thickness of 200 μm was produced on one of the tetrafluoroethylene resin layers of the core by application, drying and firing under the same production conditions as in Example 1.

Further, the phosphor layer and the core were formed by coating, drying and firing under the same production conditions as described above using a tetrafluoroethylene-hexafluoropropylene copolymer resin fine particle aqueous dispersion (manufactured by Dupont) having the same composition as in Example 1. A protective layer (outermost layer) having a thickness of 20 μm was obtained on the other tetrafluoroethylene resin layer of the body. The obtained fluorescent composite had the laminated structure shown in FIG. The visible light transmittance of the obtained fluorescent composite as defined in JIS Z8722 was less than 20%.

Example 4
A core body was produced in the same manner as in Example 1.

Next, strontium aluminate-based phosphorescent phosphor powder having the same composition as that of Example 1 was applied to 1.25 kg of an ethylene tetrafluoride resin fine particle aqueous dispersion (made by Daikin Industries) having the same composition as that of Example 1. An aqueous dispersion of ethylene tetrafluoride resin fine particles mixed with 250 g of phosphorescent phosphor powder was prepared by mixing and stirring. The mixing ratio of the phosphorescent phosphor powder at this time is 25% by weight with respect to 75% by weight of the tetrafluoroethylene resin fine particles. Next, a phosphor layer having a thickness of 200 μm was obtained on one of the tetrafluoroethylene resin layers of the core by application, drying and firing under the same production conditions as in Example 1.

(Comparative Example 1)
The same kind of glass fiber fabric as in Example 1 (manufactured by Nitto Boseki) was applied by impregnating with a tetrafluoroethylene resin fine particle aqueous dispersion (manufactured by Daikin Industries) having the same composition as in Example 1. After drying for 5 minutes in a sealed furnace with the atmospheric temperature adjusted to 100 ° C. and removing the moisture, it was fired for 5 minutes in a sealed furnace with the atmospheric temperature adjusted to 360 ° C. By repeating this process a plurality of times, a core body was obtained by obtaining a tetrafluoroethylene resin layer having a total thickness of 330 μm on both sides. Further, a protective layer having a thickness of 20 μm is formed on both surfaces of the core by the same production method as above using an ethylene tetrafluoride-hexafluoropropylene copolymer resin fine particle aqueous dispersion (manufactured by Dupont) having the same composition as in Example 1. Formed. The obtained composite does not include a phosphor layer.

(Comparative Example 2)
A fluorescent composite having the laminated structure shown in FIG. 7 was produced by the following method.

First, the core body 1 was produced in the same manner as in Example 1.

Next, a PFA fine particle aqueous dispersion (made by Mitsui DuPont Fluorochemical Co., Ltd.) comprising 60% by weight of a tetrafluoroethylene perfluoroalkyl vinyl ether copolymer resin (PFA), 6% by weight of a nonionic surfactant and 34% by weight of water. ) With respect to 1.33 kg, 200 g of strontium aluminate phosphorescent phosphor powder having the same composition as in Example 1 was mixed and stirred to prepare a PFA fine particle aqueous dispersion in which phosphorescent phosphor powder was mixed. The mixing ratio of the phosphorescent phosphor powder at this time is 20% by weight with respect to 80% by weight of the PFA fine particles. Next, the first and second phosphor layers 11 ₁ and 11 ₂ having a thickness of 200 μm were formed on both PFA 1b layers of the core 1 by coating, drying and firing under the same manufacturing conditions as in Example 1.

Further, both phosphor layers were obtained by coating, drying and firing under the same production conditions as described above, using an aqueous dispersion of tetrafluoroethylene-hexafluoropropylene copolymer resin fine particles (manufactured by Dupont) having the same composition as in Example 1. On top, protective layers (outermost layers) 3 ₁ and 3 ₂ having a thickness of 20 μm were obtained.

(Comparative Example 3)
A fluorescent composite having the laminated structure shown in FIG. 8 was produced by the following method.

The core 1 was produced in the same manner as in Example 1.

Next, ethylene tetrafluoride-6 hexafluoride-hexafluoropropylene copolymer resin (FEP) comprising 54% by weight, nonionic surfactant 5.5% by weight and water 40.5% by weight. 200 g of strontium aluminate phosphorescent phosphor (manufactured by Nemoto Special Chemical Co., Ltd.) having the same composition as in Example 1 was mixed and stirred with respect to 1.33 kg of propylene fluoride copolymer resin fine particle aqueous dispersion (manufactured by Dupont). An FEP fine particle aqueous dispersion mixed with phosphorescent phosphor powder was prepared. The mixing ratio of the phosphorescent phosphor powder at this time is 20% by weight with respect to 80% by weight of the FEP fine particle content. Next, first and second phosphor layers 12 ₁ and 12 ₂ having a thickness of 200 μm were produced on both FEP layers 1b of the core 1 by coating, drying and firing under the same production conditions as in Example 1. .

(Comparative Example 4)
A fluorescent composite having a multilayer structure shown in FIG. 9 was produced in the same manner as in Comparative Example 2 except that the protective layers 3 ₁ and 3 ₂ were not provided on the outermost layer.

The fluorescent complexes of Examples 1 to 4 were stored in an environment where light was blocked for 24 hours. The fluorescent composite after storage was irradiated with light having an illuminance of 5000 Lx for 1 hour. After irradiation, it was transferred to a dark room, and after 1 minute, afterglow luminance was measured from a distance of 0.2 m at an angle of 90 ° using an LS-100 luminance meter (manufactured by Konica Minolta). The measurement time was changed to 10 minutes, 30 minutes and 60 minutes after moving into the dark room, and the afterglow luminance was measured.

From Table 1, it can be seen that the afterglow luminance is higher when the content of the phosphor particles in the phosphor layer is larger.

DESCRIPTION OF SYMBOLS 1 ... Core body, 1a ... Heat-resistant woven fabric, 1b ... Fluororesin layer, 2 ₁ to 2 ₂ , 11 ₁ to 11 ₂ , 12 ₁ to 12 ₂ ... Phosphor layer.

Claims

A core including a heat-resistant woven fabric and a fluororesin layer formed on both surfaces of the heat-resistant woven fabric;
A fluorescent composite comprising a phosphor and a phosphor layer containing a tetrafluoroethylene resin.
The phosphor composite according to claim 1, wherein the content of the phosphor in the phosphor layer is in the range of 10 wt% to 25 wt%.
The fluororesin layer includes at least one selected from the group consisting of a tetrafluoroethylene resin, a tetrafluoroethylene perfluoroalkyl vinyl ether copolymer resin, and a tetrafluoroethylene-hexafluoropropylene copolymer resin. The fluorescent complex according to any one of claims 1 to 2.
The fluorescent composite according to any one of claims 1 to 3, further comprising a protective layer containing a melt-flowable fluororesin, wherein the protective layer is disposed on at least one surface of the phosphor layer.
The fluorescent composite according to any one of claims 1 to 3, further comprising a protective layer containing a melt-flowable fluororesin, wherein the protective layer is disposed at least in the outermost layer.
6. The fluorescent composite according to claim 1, wherein the heat-resistant woven fabric includes at least one selected from the group consisting of glass fiber, carbon fiber, ceramic fiber, aramid fiber, and metal fiber.
The fluorescent composite according to any one of claims 1 to 6, wherein a woven structure of the heat resistant woven fabric is a basket weave, a twill weave, a deformed twill weave, a satin weave or a plain weave.
The phosphor complex according to any one of claims 1 to 7, wherein the phosphor is a phosphorescent phosphor.
The fluorescent composite according to any one of claims 1 to 8, which has a visible light transmittance of less than 20% as defined in JIS Z8722.