JP2009263606A - Membrane material for luminous ceiling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a membrane material for a luminous ceiling which functions as a nonflammable ceiling material having optical transparency normally, emits light by itself at the time of turning off and power failure, and serves as temporary illumination or as a mark. <P>SOLUTION: On the front side surface of a fiber textile made of glass fiber filaments, silica fiber filaments, and their mixed fiber filaments, a light storage fluorescent resin layer containing 20 to 60 mass% of a light storage phosphor material is provided, and a laminated body with the visible light transmittance (JIS Z8722) of 20 to 60% is formed. Thereby, a nonflammable membrane material for the luminous ceiling conforming especially to a cone calorimeter test (ASTM-E1354) is obtained. When needed, a fluorescent brightening agent and a photo-diffusible particle are contained in the light storage phosphor material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical ceiling film material having a phosphorescent fluorescence function (a phosphorescent property and an afterglow property). More specifically, it normally functions as a film material for optical ceilings, and when it is turned off or during a sudden power outage, the film material itself emits light without requiring power, temporarily replacing lighting. In addition to avoiding confusion, the present invention relates to an optical ceiling film material that can serve as a landmark and signpost for the public.

  In public facilities that are often used by an unspecified number of people, such as theaters, hotels, public halls, museums, etc., especially for building materials in internal spaces (including elevator rooms) A flame design is required.

  Recently, when a ceiling material has fallen due to an earthquake and there is a person underneath, there is a risk of injury, so in order to prevent the ceiling material from falling, a membrane material is installed on the ceiling, and further lighting light is applied. There are cases where it is used as an optical ceiling by transmitting. When a membrane material is used as an optical ceiling, since it is an essential condition that it has non-combustibility, the use of a membrane material containing an inorganic fiber woven fabric such as glass fiber or silica fiber is increasing. Also, if you turn off the lights in the underground shopping center or indoors, or if it becomes completely dark due to a power failure, you may not know the doorway and evacuation route, and there is a risk of a big panic. Therefore, when such a situation occurs, there is a need for a visual cognitive means that can temporarily evacuate and guide people instead of temporary lighting.

Conventionally, as a visual recognition means in such a situation, application of a phosphorescent fluorescent (phosphorescent and afterglow) substance is known. Calcium sulfide (CaS · Bi) and zinc sulfide (ZnS · Cu) phosphors are known as phosphorescent fluorescent (phosphorescent and afterglow) substances. The former has a low afterglow luminance, and the latter has a residual phosphor. There are drawbacks such as short duration of light (afterglow time), and so far there have been almost no cases where it is put to practical use as a phosphorescent phosphor film material.
Recently, as phosphorescent phosphors having afterglow brightness and afterglow time about 10 times that of zinc sulfide phosphors, calcium aluminate, strontium aluminate, and barium aluminate containing ions such as europium and dysprosium as activators. A phosphorescent phosphor is proposed (Patent Document 1: Japanese Patent Laid-Open No. 7-11250), and a vinyl chloride resin composition using the phosphor is also proposed (Patent Document 2: Japanese Patent Laid-Open No. 7-247391). Publication).

  In addition, as a phosphorescent fluorescent sheet that can withstand indoor and outdoor use, a sheet is proposed in which a PVC sheet containing a phosphorescent phosphor is laminated on a substrate layer with a whiteness of 60 or more and various antifouling layers are formed on the surface. Has been. (Patent Document 3: JP-A-10-250006). In addition, a laminate is proposed in which the skin is a transparent hard PVC film, the intermediate layer is a soft PVC sheet containing a phosphorescent phosphor, and the lower layer is a white hard PVC sheet. (Patent Document 4: JP-A-11-138709). However, when these sheets are used as a light ceiling material, the white layer located under the phosphorescent phosphor layer lowers the light transmittance of the sheet, so that the brightness due to internal illumination becomes insufficient, and the light ceiling The sheet did not function as a material at all. Therefore, it is a non-combustible sheet with a phosphorescent fluorescent function (phosphorescent and afterglow) that can be used as temporary lighting in the event of a power outage or as a sign of evacuation guidance, and be used beautifully as an optical ceiling material There has never been a sheet that can be used.

JP 7-11250 A JP 7-247391 A Japanese Patent Laid-Open No. 10-250006 JP-A-11-138709

  The present invention normally functions as a light-transmitting ceiling material, and when it is turned off or when power transmission stops and becomes dark, it emits light itself and becomes a substitute for temporary lighting. It is an object of the present invention to provide a film material for optical ceiling that is extremely useful and has non-flammability that conforms to the test (cone calorimeter test method specified in ASTM-E1354).

  In order to solve this problem, the present inventors, as a result of intensive studies, laminated a phosphorescent fluorescent resin layer on a fiber fabric composed of glass fiber yarns, silica fiber yarns, and mixed fiber yarns, and specified them. It was found that an optical ceiling film material satisfying both luminous properties at the time of power outage at night can be obtained by adjusting so that the visible light transmittance can be reduced without disturbing the transmitted light of illumination during normal use.

That is, the optical ceiling film material of the present invention contains 20 to 60% by mass of a phosphorescent phosphor material on a fiber fabric composed of glass fiber yarns, silica fiber yarns, and mixed fiber yarns thereof. A laminate of at least two layers, wherein a fluorescent resin layer is laminated and the visible light transmittance (JIS Z8722) is adjusted to 20 to 60%, and the laminate is formed from a radiant electric heater. When the surface is irradiated with radiant heat of 50 kW / m ² , the total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less, and the maximum heat generation rate continues for 10 seconds or more for 20 minutes after the start of heating. Is 200 kW / m ² , and has a non-flammable performance that does not generate cracks and holes penetrating the back surface of the flexible laminate for 20 minutes after the start of heating. . The optical ceiling film material of the present invention preferably has an average action stop time value of 6.8 minutes or more in the gas hazard test in accordance with the old Ministry of Construction Notification No. 1231. In the optical ceiling film material of the present invention, a light diffusing agent may be contained in the phosphorescent fluorescent resin layer. In the optical ceiling film material of the present invention, a fluorescent whitening agent may be contained in the phosphorescent fluorescent resin layer. The light ceiling film material of the present invention may be provided with a light diffusing resin layer on the phosphorescent fluorescent resin layer and / or the back surface of the base fabric. The optical ceiling film material of the present invention preferably has an antifouling layer or a printed layer on at least one side.

According to the present invention, it is possible to provide an optical ceiling film material that is sufficiently satisfied with the brightness and color developability by internal illumination and that has sufficient afterglow luminance (mcd / m ² ). In addition, the optical ceiling construction with the film material for optical ceiling attached to the frame usually not only satisfies the brightness and color development due to internal lighting, but also when sudden power failure occurs and it becomes completely dark It becomes a very useful light ceiling construction that can temporarily substitute for lighting, avoid confusion, and become a landmark and signpost for the public.

Since the film material for optical ceiling of the present invention has noncombustibility, a fiber fabric made of glass fiber yarns, silica fiber yarns, and mixed fiber yarns is used as a base fabric. The base fabric can be a multi-axial weave such as plain weave, satin weave, triaxial weave, and tetraaxial weave. The meshing degree (porosity) of the base fabric is preferably 0 to 3%, more preferably 0 to 1.5%. If the degree of cut exceeds 3%, it may cause pinholes that interfere with smoke shielding performance in the building standard method combustion test (cone calorimeter test method specified in ASTM-E1354). The porosity representing the degree of stitching is a value obtained by subtracting from 100 the area of the yarn occupying in the unit area (preferably 10 cm × 10 cm) of the fabric. As for the mass of a base fabric, 90-500 g / m < ² > is desirable. If the mass of the base fabric is less than 90 g / m ² , the proportion of the base fabric in the product mass decreases, and it may not be possible to satisfy the conditions for passing the nonflammability test. In addition, when the mass of the base fabric exceeds 500 g / m ² , the visible light transmittance is low, and the illumination light and the light emission of the phosphorescent fluorescent resin layer cannot be sufficiently transmitted, so that sufficient illuminance is secured in the room. become unable.

  As long as the effect of the present invention is not hindered, the base fabric may be appropriately subjected to pretreatment such as adhesion treatment, water absorption prevention treatment, and flameproofing treatment as necessary using conventionally known materials and methods. it can.

  In the optical ceiling film material of the present invention, the phosphorescent fluorescent resin layer is made of a thermoplastic resin containing a phosphorescent fluorescent substance. Here, the phosphorescent fluorescent material refers to a substance having a performance (afterglow) which is excited by irradiating light and continues to emit fluorescent color after the light irradiation is stopped. There is no particular limitation on the thermoplastic resin constituting the phosphorescent fluorescent resin layer, for example, vinyl chloride resin, vinyl chloride copolymer resin, olefin resin, olefin copolymer resin, urethane resin, urethane copolymer resin, Thermoplastic resins such as acrylic resin, acrylic copolymer resin, vinyl acetate resin, vinyl acetate copolymer resin, styrene resin, styrene copolymer resin, polyester resin, polyester copolymer resin, and fluorine copolymer resin It can be used alone or in combination of two or more. Among these thermoplastic resins, vinyl chloride resins, vinyl chloride copolymer resins, urethane resins, urethane resins are used to obtain ease of processing, flexibility of film materials, adhesion when laminated with a base fabric, etc. A copolymer resin, an acrylic resin, and an acrylic copolymer resin are particularly preferably used.

The phosphorescent fluorescent material to be contained in the phosphorescent fluorescent resin layer is not particularly limited, and for example, a substance obtained by adding a rare earth element as an activator to a substance obtained by using a divalent metal aluminate as a base crystal can be used. Divalent metals include magnesium, calcium, strontium, barium, zinc, and rare earth elements include cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, etc. These rare earth elements may be used alone or in combination. Among them, SrAl ₂ O ₄ : Eu, Dy, Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy, CaAl ₂ O ₄ : Eu, Nd, Sr ₄ (Al · B) ₁₄ O ₂₅ : Eu, Dy, etc. are preferable. In particular, an alumina strontium oxide based phosphorescent phosphor having excellent afterglow properties is preferred. The average particle diameter of the phosphorescent phosphor is preferably 1 to 100 μm, more preferably 10 to 50 μm. In consideration of the dispersibility of the phosphorescent phosphor, two or more types having an average particle diameter may be used in combination.

The mass of the phosphorescent fluorescent resin layer is preferably adjusted in the range of 100 to 500 g / m ² . If the mass of the phosphorescent fluorescent resin layer is less than 100 g / m ² , the phosphorescent fluorescent material must be closely packed in order to increase the amount of the phosphorescent fluorescent substance attached per unit area, and the phosphorescent action and light emitting action are near the surface. It can only be done at the site and cannot be done efficiently. On the other hand, if it exceeds 500 g / m ² , the corn calorimeter test described in the previous section may fail. The content of the phosphorescent fluorescent substance in the phosphorescent fluorescent resin layer is preferably 20 to 60% by mass. When the content of the phosphorescent fluorescent material is less than 20% by mass, the phosphorescent action of the phosphorescent fluorescent resin layer becomes insufficient, and the product may have a low afterglow luminance and a short afterglow time. On the other hand, when the content exceeds 60% by mass, the resin strength of the phosphorescent fluorescent resin layer is lowered, and the durability as a film material for optical ceiling may be insufficient. Similarly, when the content exceeds 60% by mass, the visible light transmittance of the phosphorescent fluorescent resin layer is lowered, and the translucency necessary for the optical ceiling film material may not be obtained. The action and the light emission action are not efficiently performed, and the afterglow luminance may be lowered.

  The method for forming the phosphorescent fluorescent resin layer on the surface of the base fabric layer is not particularly limited, but the liquid kneaded with phosphorescent phosphor is directly applied to the base fabric by doctor knife coating or a rotary screen. A method of coating, a method of coating a release paper with a processing solution, transferring a film to a base fabric, and forming a compound containing a phosphorescent phosphor into a film by an extrusion molding method or a calendar molding method. It can be formed by a conventionally known method such as a method of laminating on a cloth.

  In the phosphorescent fluorescent resin layer, the luminous phosphorescent resin layer efficiently emits light and receives natural light during internal illumination, so long as the effect of the present invention is not impaired. An optical brightener may be included. The fluorescent brightening agent contained in the phosphorescent fluorescent resin layer is preferably 0.01 to 1% by mass. If it is less than 0.01%, a sufficient addition effect of the optical brightener cannot be obtained. On the other hand, if it exceeds 1% by mass, the light reaching the phosphorescent phosphor may be inhibited and a sufficient phosphorescent effect may not be obtained.

  The phosphorescent fluorescent resin layer may contain a light diffusing agent as long as the effects of the present invention are not impaired in order to prevent the internal illumination from being seen through. As the light diffusing agent, glass beads, acrylic resin beads, highly light-transmitting calcium carbonate-based particles, or the like can be used alone or in combination. The light diffusing agent contained in the phosphorescent fluorescent resin layer is preferably 1 to 30% by mass. If it is less than 1%, a sufficient effect of adding a light diffusing agent cannot be exhibited, and if it exceeds 30% by mass, light transmittance may be impaired. In addition to the ultraviolet absorbent, the antioxidant, the flameproofing agent, the antifungal agent, the pigment, the antistatic agent, and the adhesive, as necessary, as long as the phosphorescent fluorescent resin layer does not impair the effects of the present invention. , Fillers, stabilizers, plasticizers and other additives may be included.

  In the optical ceiling film material of the present invention, a light diffusing resin layer comprising a thermoplastic resin and a light diffusing agent may be provided on the phosphorescent fluorescent resin layer and / or on the back surface of the base fabric. There is no particular limitation on the thermoplastic resin constituting the light diffusing resin layer, for example, vinyl chloride resin, vinyl chloride copolymer resin, olefin resin, olefin copolymer resin, urethane resin, urethane copolymer resin, Thermoplastic resins such as acrylic resin, acrylic copolymer resin, vinyl acetate resin, vinyl acetate copolymer resin, styrene resin, styrene copolymer resin, polyester resin, polyester copolymer resin, and fluorine copolymer resin It can be used alone or in combination of two or more. Among these thermoplastic resins, vinyl chloride resins, vinyl chloride copolymer resins, urethane resins, urethane resins are used to obtain ease of processing, flexibility of film materials, adhesion when laminated with a base fabric, etc. A copolymer resin, an acrylic resin, and an acrylic copolymer resin are particularly preferably used. As the light diffusing agent, glass beads, acrylic resin beads, highly light-transmitting calcium carbonate-based particles, or the like can be used alone or in combination. The light diffusing agent contained in the light diffusing resin layer is preferably 1 to 30% by mass. If it is less than 1%, a sufficient effect of adding a light diffusing agent cannot be exhibited, and if it exceeds 30% by mass, light transmittance may be impaired. As long as the light diffusing resin layer does not impair the effects of the present invention, an ultraviolet absorber, an antioxidant, a flameproofing agent, an antifungal agent, a pigment, an antistatic agent, and an adhesive are added as necessary. , Fillers, stabilizers, plasticizers and other additives may be included.

  In the optical ceiling film material of the present invention, an antifouling layer may be provided on at least one surface in order to prevent dirt from adhering to the cloth surface. The antifouling layer can be formed by a conventionally known method such as a gravure coating method using a resin liquid such as an acrylic resin, an acrylic / fluorine resin, or a PVDF resin, or a method in which the resin is formed into a film and laminated by lamination. In addition, the optical ceiling film material of the present invention can be provided with a printed layer on at least one surface in order to improve design properties. The printing layer can be provided by a conventionally known method such as inkjet printing, screen printing, or gravure printing.

  The base fabric may also be provided with a resin layer made of a thermoplastic resin on one side or both sides thereof as long as the effects of the present invention are not impaired. An inhibitor, flame retardant, antifungal agent, pigment, antistatic agent, adhesive, filler, stabilizer, plasticizer, and other additives may be included.

  The optical ceiling film material of the present invention preferably has a visible light transmittance of 20 to 60% as defined in JIS Z8722. When the visible light transmittance is less than 20%, the brightness when used as an optical ceiling construction is insufficient, and the light emission at the time of night power outage may be insufficient. When the visible light transmittance exceeds 60%, when used as an optical ceiling construction, the internal illumination can be seen through, and its usefulness may be impaired.

  The light ceiling using the film material for light ceiling of the present invention is attached to the frame with the surface provided with the phosphorescent fluorescent resin layer facing the illuminating lamp side, so that the light for internal illumination is stored in the phosphorescent fluorescent resin layer at the time of internal lighting As a result, the phosphorescent state is always sufficient, and even if power transmission stops and it becomes dark, it can emit enough light, function as temporary lighting, and can serve as a mark for evacuation passages and evacuation sites. In addition, the optical ceiling using the film material for optical ceiling of the present invention is used as another application example to turn on / off the internal lighting, such as turning on the internal lighting again after stopping the internal lighting for a certain time during internal lighting. The method can also be expected to save power for lighting.

The invention is further illustrated by the following examples. In the following examples, the test methods used for product performance evaluation are as follows.
(1) Combustion test (ASTM-E1354: Corn calorimeter test method)
In a heat generation test in which 50 kW / m ² of radiant heat from a radiant electric heater was applied to the film material for 20 minutes, the total heat generation rate and heat generation rate for 20 minutes were measured, and the appearance of the film material after the test was observed.
(A) Total calorific value: 8 MJ / m ² or less was determined to be suitable, and a value exceeding 8 MJ / m ² was determined to be non-conforming.
(B) Heat generation rate: Conformity was determined for 10 seconds or longer and did not exceed 200 kW / m ² , and 10 second or longer for 200 kW / m ² was determined to be nonconforming.
(C) Appearance observation: Applicable to those with no pinhole depressions exceeding 0.5 mm in diameter, and those with pinhole depressions exceeding 0.5 mm in diameter as inferior to combustion gas shielding It was.
In order to conform to the non-combustible film material, at least the above characteristics (a) and (b) must satisfy the conformity evaluation.
(2) Gas Hazard Test According to the former Ministry of Construction Notification No.1231, No. 1231, No. 431 gas hazard test equipment and measurement method, measure the average behavior stop time of mice. The test specimen was heated by radiant heat and flame contact from an electric heater in a heating furnace, and the mean time X and standard deviation σ of the time taken until the eight mice that inhaled the generated gas stopped behavior (behavior stop time). The behavior stop time Xs of the mouse is obtained by the following equation.
Xs = X−σ
A case where the value of Xs was larger than 6.8 minutes (mouse suspension time in standard wood) was regarded as acceptable. Here, the value obtained by subtracting the standard deviation from the average value of the action stoppage time is used as a criterion for the acceptance / rejection due to the concept of evaluation including variations in materials and test results.
(3) Visible light transmittance of film material for optical ceiling The visible light transmittance of the sample was measured according to JIS Z8722.
(4) Performance as a film material for optical ceiling A general-purpose film material for optical ceiling (ADMAX V1500LMP: Hiraoka Oryome) Compared with the product).
The brightness of the interior lighting was evaluated as follows.
Adequate or better than Admax V1500LMP Good brightness Inferior to Admax V1500LMP Poor brightness (5) Afterglow brightness of film material Assuming that nighttime power transmission stops and becomes dark when used as a film material for optical ceilings (Mcd / m ² ) was measured.
The sample to be measured was stored for 24 hours after blocking light, and then subjected to the test under the following conditions.
1) Measurement conditions (1) Irradiation surface: Surface on which a phosphorescent fluorescent resin layer is formed (2) Illuminance / irradiation time: 1000 Lx (assuming internally-illuminated fluorescent lamp) / 20 minutes (3) Afterglow luminance measurement surface: Surface opposite to irradiated surface (4) Measurement distance / measurement angle: 0.2 m / 90 °
(5) Measuring instrument: LS-100 luminance meter (manufactured by Konica Minolta Co., Ltd.)
(6) Measurement time: 1, 10, 30, 60, 120, 180 minutes later 2) Evaluation The afterglow luminance measurement value was shown, and the determination was made in the following four steps (the larger the value, the brighter).
Afterglow brightness (mcd / m ² )
5 or more: 4
3 or more and less than 5: 3
2 or more and less than 3: 2
Less than 2: 1
If the afterglow luminance is 5 mcd / m ² or more, the afterglow is so bright that the afterglow can be clearly confirmed, and if it is less than ² mcd / m ² , the afterglow is so dark that almost no afterglow can be confirmed.

[Example 1]
(1) Formation of base fabric and adhesion treatment layer A glass filament plain fabric having the following structure was used as the base fabric.
75 ・ 1/0 × 75 ・ 1/0
44 × 33 mass 215 g / m ²
This base fabric is dipped in a solvent diluted solution of a resin composition of the following formulation 1 containing a paste vinyl chloride resin and a heat-crosslinkable adhesive, the base fabric is impregnated with a resin solution, squeezed, and 150 ° C. for 1 minute. After drying, heat treatment was performed at 185 ° C. for 1 minute, and the resin was adhered to the base fabric at 60 g / m ² to form an adhesive resin layer.
<Formulation 1> Adhesive resin layer treatment liquid composition Paste vinyl chloride resin 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Thermally crosslinkable adhesive 15 parts by mass Antimony trioxide (flame retardant) 10 parts by mass Epoxidized soybean oil (stabilizer) 4 parts by weight Ba-Zn stabilizer (stabilizer) 2 parts by weight Toluene (solvent) 20 parts by weight (2) Formation of phosphorescent fluorescent resin layer Paste vinyl chloride resin and phosphorescent phosphor Using a solvent-diluted solution of the resin composition of the following formulation 2 containing a release coating, a clearance coating is performed at a clearance of 200 μm on a PET film for release (thickness: 100 μm), 320 g / m ^{2 is} adhered, and 150 ° C. for 1 minute. After drying, heat treatment was performed at 185 ° C. for 1 minute to form a phosphorescent fluorescent resin layer.
The content of the phosphorescent phosphor in the phosphorescent fluorescent resin layer was 38% by mass.
<Formulation 2> Phosphorescent fluorescent resin layer treatment liquid composition Paste vinyl chloride resin 100 parts by mass
Di-2-ethylhexyl phthalate (plasticizer) 35 parts by mass
Tricresyl phosphate (flame retardant plasticizer) 20 parts by mass Epoxidized soybean oil (stabilizer) 4 parts by mass Ba-Zn stabilizer (stabilizer) 2 parts by mass
Triazole ultraviolet absorber 2 parts by mass Luminescent phosphor Sr ₄ Al ₁₄ O ₂₅ : EU, Dy
(Easy Bright EZCB-50E average particle size 50 μm)
100 parts by mass (38% by mass)
Toluene (Solvent) 5 parts by mass PET film is peeled off and pasted onto one side of a base fabric on which an adhesive resin layer is formed, and then heat embossed to smooth the surface, thereby forming a membrane material. Obtained.
(3) Formation of antifouling layer An acrylic resin composition of the following formulation 3 was dried on both surfaces of the film material obtained in (2) above using a gravure coater at a wet coating amount of 15 g / m ² at 120 ° C. for 1 minute. An antifouling layer was formed by coating so as to be 1.5 g / m ^2, and an optical ceiling film material was obtained.
<Formulation 3> Acrylic resin composition Acryprene (registered trademark) pellet HBS001 (Mitsubishi Rayon Co., Ltd.) 20 parts by mass
Toluene-MEK (50/50 weight ratio) (Solvent) 80 parts by mass of the obtained optical ceiling film material had a visible light transmittance of 34%.
This optical ceiling film material was subjected to the test. The test results are shown in Table 1.

[Example 2]
In the same manner as in Example 1, the base fabric was subjected to adhesion treatment, and the phosphorescent fluorescent resin layer was adhered to one surface of the adhesion-treated base fabric, and then the thermoplastic resin composition shown in the following formulation 4 was calendered with a thickness of 100 μm. Make a film, attach it to the opposite side of the phosphorescent fluorescent resin layer, form a thermoplastic resin layer, and coat the acrylic resin composition shown in Formula 3 on both sides as in Example 1 to form an antifouling layer By forming, a film material for optical ceiling was obtained.
<Formulation 4> Thermoplastic resin composition Straight vinyl chloride resin 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 32 parts by mass tricresyl phosphate (flame retardant plasticizer) 16 parts by mass Epoxidized soybean oil (stabilizer) 3 parts by mass Ba-Zn-based stabilizer (stabilizer) 3.5 parts by mass UV absorber 1.0 part by mass This optical ceiling film material was subjected to the above test. The test results are shown in Table 1.

[Example 3]
A film material for optical ceiling was produced in the same manner as in Example 2. However, instead of forming the thermoplastic resin layer, the light diffusing agent-containing thermoplastic resin composition shown in Formula 5 below is made into a film having a thickness of 100 μm with a calender and attached to the surface opposite to the phosphorescent fluorescent resin layer. A diffusible resin layer was formed.
<Formulation 5> Light diffusing agent-containing thermoplastic resin composition Straight vinyl chloride resin 100 parts by weight Di-2-ethylhexyl phthalate (plasticizer) 32 parts by weight tricresyl phosphate (flame retardant plasticizer) 16 parts by weight Large epoxidation Soybean oil (stabilizer) 3 parts by weight Ba-Zn-based stabilizer (stabilizer) 3.5 parts by weight UV absorber 1.0 part by weight Acrylic resin beads (Sekisui Plastics Co., Ltd. Techpolymer MBX-50 average Grain size 50μm)
20 parts by mass (11% by mass)
This optical ceiling film material was subjected to the test. The test results are shown in Table 1.

[Example 4]
A film material for optical ceiling was prepared in the same manner as in Example 1. However, when the phosphorescent fluorescent resin layer was formed, the fluorescent whitening agent-containing phosphorescent fluorescent resin composition shown in Formulation 6 was used.
<Formulation 6> Phosphor whitening agent-containing phosphorescent fluorescent resin composition Paste vinyl chloride resin 100 parts by mass
Di-2-ethylhexyl phthalate (plasticizer) 35 parts by mass
Tricresyl phosphate (flame retardant plasticizer) 20 parts by mass Epoxidized soybean oil (stabilizer) 4 parts by mass Ba-Zn stabilizer (stabilizer) 2 parts by mass
Triazole ultraviolet absorber 2 parts by mass Luminescent phosphor Sr ₄ Al ₁₄ O ₂₅ : EU, Dy
(EZCB-50E average particle size 50μ manufactured by Easy Bright)
100 parts by mass (38% by mass)
Toluene (solvent) 5 parts by weight fluorescent whitening agent (UVITEX OB manufactured by Ciba Japan Co., Ltd.) 0.1 part by weight This optical ceiling film material was subjected to the above test. The test results are shown in Table 1.

[Example 5]
A film material for optical ceiling was produced in the same manner as in Example 2. However, a 3 cm square pattern was printed with a black line having a line width of 1 mm on the antifouling layer on the thermoplastic resin layer side of the optical ceiling film material and subjected to the above test. The test results are shown in Table 1.

As is apparent from Table 1, the optical ceiling membrane materials obtained in Examples 1 to 5 function sufficiently as a light-transmitting ceiling material during internal illumination, and are further based on the phosphorescent fluorescent resin layer when extinguished. The afterglow brightness (mcd / m ² ) is also sufficient. If a sudden disaster occurs at night and power transmission stops and it becomes dark, it will emit light itself and serve as temporary lighting. It was an extremely useful film material for optical ceilings, which was a place marker. Further, in Example 3, the light diffusing resin layer is formed on the surface opposite to the phosphorescent fluorescent resin layer, so that the outline of the internal illumination becomes inconspicuous, and the brightness at the time of internal illumination and the afterglow luminance after the light is turned off. Was almost the same as in Example 2.
On the other hand, in Example 4 in which a fluorescent brightening agent was used for the phosphorescent fluorescent resin layer, the light from the illumination was received during the internal illumination, and the whiteness of the transmitted light increased, resulting in more natural light emission. Furthermore, in Example 5, the illumination light is sufficiently transmitted at the time of internal illumination, and the pattern printed by the ink jet printer looks clear not only at the time of internal illumination but also by the afterglow after the light is turned off. The light emission of the layer was hardly impaired.

[Comparative Example 1]
A film material was produced in the same manner as in Example 1. However, a polyester filament plain fabric having the following structure was used as the base fabric.
250d x 250d
44 × 33 Mass: 85 g / m ²

This membrane material was subjected to the test. The test results are shown in Table 2.
The obtained film material could not achieve the acceptance criteria of the combustion test, and could not achieve the performance as an incombustible material that was essential as a film material for optical ceiling.

[Comparative Example 2]
A film material was produced in the same manner as in Example 1. However, when forming the phosphorescent fluorescent resin layer, the phosphorescent fluorescent resin composition shown in Formulation 7 was used instead of Formulation 2.
<Formulation 7> Phosphorescent fluorescent resin layer composition Paste vinyl chloride resin 100 parts by mass
Di-2-ethylhexyl phthalate (plasticizer) 35 parts by mass
Tricresyl phosphate (flame retardant plasticizer) 20 parts by mass Epoxidized soybean oil (stabilizer) 4 parts by mass Ba-Zn stabilizer (stabilizer) 2 parts by mass
Triazole ultraviolet absorber 2 parts by mass Luminescent phosphor Sr ₄ Al ₁₄ O ₂₅ : EU, Dy
(EZCB-50E average particle size 50μ manufactured by Easy Bright)
20 parts by mass (10% by mass)
Toluene (solvent) 5 parts by mass This membrane material was subjected to the test. The test results are shown in Table 2.
Although the visible light transmittance of the obtained film material is superior to that of Example 1, the initial afterglow luminance is very low and the afterglow luminance becomes less than 2 in 30 minutes. The role as a light could not be fully demonstrated.

[Comparative Example 3]
A film material was produced in the same manner as in Example 1. However, when the phosphorescent fluorescent resin layer was formed, the phosphorescent fluorescent resin layer composition shown in Formulation 8 was used instead of Formulation 2.
<Formulation 8> Phosphorescent fluorescent resin composition Paste vinyl chloride resin 100 parts by mass
Di-2-ethylhexyl phthalate (plasticizer) 35 parts by mass
Tricresyl phosphate (flame retardant plasticizer) 20 parts by mass Epoxidized soybean oil (stabilizer) 4 parts by mass Ba-Zn stabilizer (stabilizer) 2 parts by mass
Triazole ultraviolet absorber 2 parts by mass Luminescent phosphor Sr ₄ Al ₁₄ O ₂₅ : EU, Dy
(EZCB-50E average particle size 50μ manufactured by Easy Bright)
100 parts by mass (38% by mass)
Titanium oxide 10 parts by mass Toluene (solvent) 5 parts by mass This membrane material was subjected to the above test. The test results are shown in Table 2.
The visible light transmittance of the obtained film material was significantly lower than that of Example 1, the performance as a film material for optical ceiling could not be sufficiently satisfied, and the afterglow luminance was lower than that of Example 1 from the initial stage. .

[Comparative Example 4]
A film material was produced in the same manner as in Example 1. However, when forming the phosphorescent fluorescent resin layer, the phosphorescent fluorescent resin layer composition shown in Formulation 9 was used instead of Formulation 2.
<Formulation 9> Phosphorescent fluorescent resin composition Paste vinyl chloride resin 100 parts by mass
Di-2-ethylhexyl phthalate (plasticizer) 35 parts by mass
Tricresyl phosphate (flame retardant plasticizer) 20 parts by mass Epoxidized soybean oil (stabilizer) 4 parts by mass Ba-Zn stabilizer (stabilizer) 2 parts by mass
Triazole ultraviolet absorber 2 parts by mass Luminescent phosphor Sr ₄ Al ₁₄ O ₂₅ : EU, Dy
(EZCB-50E average particle size 50μ manufactured by Easy Bright)
300 parts by mass (64% by mass)
Toluene (solvent) 20 parts by mass This membrane material was subjected to the test. The test results are shown in Table 2.
The afterglow luminance of the obtained film material is better than that of Example 1, but because the visible light transmittance is low, it does not sufficiently transmit illumination light, and the room becomes dark, which is not sufficient as a film material for an optical ceiling. There wasn't.

Claims (7)

Non-combustible material containing a fiber fabric made of glass fiber yarns or silica fiber yarns, or a fiber fabric made of a mixture of glass fibers and silica fibers as a base fabric and having a phosphorescent fluorescent resin layer on the surface of the base fabric It is a laminate, wherein the phosphorescent fluorescent resin layer contains 20-60 mass% phosphorescent phosphor material, and the nonflammable laminate has a light transmittance of 20-60% visible light transmittance (JIS Z8722). In the corn calorimeter test method (ASTM-E1354), when the non-combustible laminate is irradiated with radiant heat from a radiant electric heater at 50 kW / m ² , the total for 20 minutes after heating is started. A film material for optical ceiling, characterized in that the calorific value is 8 MJ / m ² or less, and the maximum heat generation rate does not exceed 200 kW / m ² for 20 minutes after the start of heating for 10 seconds or more. The film material for optical ceilings according to claim 1, wherein the non-combustible laminate has a mouse average action stoppage time value of 6.8 minutes or more in a gas hazard test conforming to the former Ministry of Construction Notification No. 1231. The film material for optical ceilings of Claim 1 or 2 in which the said luminous fluorescent resin layer contains 0.01-1 mass% of fluorescent whitening agents. The film material for optical ceilings of any one of Claims 1-3 in which the said luminous fluorescent resin layer contains 1-30 mass% of light diffusable particles. The optical ceiling film material according to any one of claims 1 to 4, further comprising a light diffusing resin layer on the phosphorescent fluorescent resin layer. The film | membrane material for optical ceilings of any one of Claims 1-5 which further contains the light diffusable resin layer on the back side surface of the said base fabric. The film | membrane material for optical ceilings of any one of Claims 1-6 in which the pollution protection layer or the printing layer is formed on the at least 1 surface of the said nonflammable laminated body.