JP2013140245A - Incombustible film material for lighting cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an incombustible film material for lighting covers using a glass textile as a base material (including internal lighting type signboards) as well as lighting ceilings, which enhances a light effect and conceals a light source and reduces defects of shade of the yarn line and the texture of a textile as well as shade density due to partial looseness and yarn slippage of the texture especially when the film material is subjected to the light source, to present beautiful light appearance.SOLUTION: A incombustible film material 1 for lighting covers uses a glass textile 2 as a base material and includes a light diffusing resin coating layer 3 containing specified crushed glass powders 4 being amorphous and irregular reflection particles by a specified amount on one side of the base material.

Description

  The present invention relates to a film material for an illumination cover based on a glass fabric, and a film material for an optical ceiling. More specifically, the illumination effect is high and the light source is concealed, and the glass fabric is used as the light source. Light diffusing and permeable sheets that relieve shading and textures of the fabric and create a beautiful luminous appearance. Ceilings of condominiums, stores, large commercial facilities, office buildings, station / airport facilities, underground corridors, etc. Covered base light covers, interior lighting signs attached to them, ceiling lighting covers in elevator cars, railway cars, etc., hotel entrance lounge party venues, ceremonial occasions, event halls, etc. The present invention relates to a lightweight film material having flexibility and incombustibility used in a light film ceiling structure that uses the entire ceiling of a large-scale space as illumination.

  In recent years, the government's urban disaster prevention and non-combustion promotion project has been designed to prevent evacuation of residents and to prevent and delay the spread of fire in urban areas as a countermeasure against large-scale fires caused by large earthquakes. In addition, it promotes the incombustibility and incombustibility of buildings located around the fire spreading zone. In addition, the Building Standards Act has the fire prevention performance (conforming to the corn calorimeter test according to ISO 5660-1) determined and announced by the Minister of Land, Infrastructure, Transport and Tourism, such as nonflammable materials and semi-incombustible materials, depending on the use, structure, and scale of the building. The use of the materials provided is informed.

  In such a situation, even if the interior material of the target building is made of incombustible material approved by the Minister of Land, Infrastructure, Transport and Tourism, in many lighting devices built into the ceiling, the lighting cover is made of acrylic resin or polycarbonate resin, among others. These are the mainstream materials, and even if they meet the fire prevention standards (self-extinguishing properties) of the Fire Service Act, they do not meet the non-combustibility standards, so they become materials that hinder the incombustibility of the ceiling. On the other hand, the lighting cover is made of glass to achieve the purpose of incombustibility, but the overhead glass product ceiling placement is obvious due to the risk of falling due to an earthquake, or glass fragments scattering. Be shunned. For the same reason, it is difficult to use glass products as means for achieving incombustibility for acrylic or polycarbonate resin interior lighting signs attached to the target building.

On the other hand, in recent facilities such as intelligent buildings, station buildings, airports, large commercial facilities, amusement facilities, ceremonial occasions, and various public facilities, the introduction of light film ceiling lighting that emits light from the entire ceiling is progressing. . Light film ceiling lighting uses a non-combustible film material having light diffusivity, and such a non-combustible film material is a flexible resin composite film material based on a textile fabric, and the bonding between these film materials and a support frame Expansion according to the ceiling area is easy by joining the parts fitted in. Since these resin composite film materials are extremely tough flexible materials while being significantly lighter than conventional ceiling building materials, they are useful not only for fire countermeasures but also for countermeasures against ceiling collapsed objects caused by earthquakes. Specifically, the light diffusing film material having the fire prevention performance notified by the Minister of Land, Infrastructure, Transport and Tourism includes a fluororesin sheet having a thickness of 2 to 500 μm and a glass fiber sheet having a basis weight of ² to 10 μm and a thickness of 100 to 900 g / m ^2. A glass fiber reinforced fluororesin composite material is known. (Patent Document 1) Further, as a non-combustible film material used for lighting covers and internally illuminated signboards, a soft material obtained by graft polymerization of vinylidene fluoride on a glass fiber base fabric and a trunk polymer made of a fluorine copolymer. A sheet in which a fluororesin sheet layer is laminated is known. (Patent Document 2) Certainly, these sheets have a good balance between moderate light transmission and light source concealment while having non-flammability. However, the glass cover is incorporated into the lighting cover to provide glass. The weft structure of the warp and weft constituting the fiber base fabric becomes a transmission shadow mark. In particular, the arrangement of the warp and weft in the warp and weft arrangement (relaxation) and uneven tension (thread streaks) due to the handling and tension of the glass fiber base fabric during sheet processing ) Has a problem with irregular and unsightly streaky appearance and partial light transmission shading.

  On the other hand, in the case of railroad vehicles, for example, Iron Transport No. 81, MLIT Decree 151 and JNR 157, and JNR 124, JNR It is necessary to meet the non-combustibility standard based on No. 125. Therefore, an incombustible lighting cover having light diffusibility is required for ceiling lighting of railway vehicles. Specifically, as an illumination cover that satisfies the non-combustibility standard of railway vehicles, an illumination cover (Patent Document 3) made of a fluororesin (polytetrafluoroethylene resin) using a glass cloth as a support, a polytetrafluoroethylene resin-impregnated glass cloth sheet, heat Lighting cover (Patent Document 4) composed of a laminate including a melt-formable fluorine-containing resin layer, a glass cloth, and a low-smoke resin layer, and a non-combustible transparent material in which a liquid glass having translucency is coated on the surface of the glass fiber member. A non-combustible resin sheet is known in which a light plate (Patent Document 5) and a glass fiber base material are impregnated with a flame retardant resin and a translucent inorganic oxide film is formed on the outer surface thereof. (Patent Document 6) These sheets certainly have a good balance between moderate light transmission and light source concealment while having nonflammability, but the same glass fiber base fabric (glass) as in Patent Documents 1 and 2 In addition to the problem of transmission shadow marks of the woven structure of the cloth, the sheets of Patent Documents 3 and 4 require firing at a melting point or higher of the polytetrafluoroethylene resin (Example 1: firing at 380 ° C.). The sheet is accompanied by ivory coloration, and this coloration has the problem of fading the luminescent color of the lighting cover. In the sheet of Patent Document 5, the glass fiber member is solidified with non-stretchable liquid glass, so that a chalk mark (whitening flaw) easily occurs when the sheet is folded, and this chalk mark portion is a light-transparent shading shade. There is a problem of deteriorating the appearance of the lighting cover. Further, in the sheet of Patent Document 6, the inorganic oxide film of 50 to 200 μm is fragile and easily falls off due to sheet bending or abrasion.

  Accordingly, a non-flammable optical ceiling film material and a lighting cover film material having excellent light transmission and diffusibility using a glass fiber base fabric (glass cloth), the glass fiber base fabric (glass cloth) being woven Even when the tissue is partially relaxed or unevenly tensioned, the appearance of the film is irregular and unsightly when used for a light film ceiling or a cover for a ceiling-mounted base light. There has been a demand for a film material that does not easily generate light and shade.

JP 2002-221609 A JP-A-8-259637 JP 2006-252892 A JP 2007-220561 A JP 2011-124108 A JP 2011-238514 A

  The present invention is a flexible laminate used for a film material for lighting covers (including for internally illuminated signboards) and a film material for optical ceilings, which has a high lighting effect and conceals a light source. It is a film material for lighting covers that creates a beautiful light-emitting appearance by reducing the shading of the glass fabric and the shading of the woven structure, and the shading of the woven structure and the shading caused by misalignment. It has fire prevention performance (conforms to corn calorimeter test according to ISO 5660-1) specified and announced by the ministry, and for railroad car lighting covers, Iron Transport No. 81, MLIT Decree No. 151 and JNR No. 157 In addition, the present invention intends to provide a light diffusible and non-flammable film material that has non-combustibility standards based on JNR No. 124 and JNR No. 125.

  As a result of investigations to solve the above problems, a glass woven fabric having a specific porosity is used as a base material, and a light diffusing resin coating layer containing a specific amount of irregularly shaped and irregularly reflected particles is provided on one side of the base material. It is nonflammable, has a high lighting effect, conceals the light source, especially when the film material is covered with the light source, and the shading of the glass fabric, the shadow of the woven tissue, and the partial relaxation or misalignment of the woven tissue. The present invention was completed by finding the effect of remarkably relieving the appearance defect of the shading shading caused by.

  That is, the non-combustible film material for lighting cover of the present invention has a total light transmittance (JIS) in which a glass fabric is used as a base material and a light diffusing resin coating layer containing crushed glass powder is provided on one side of the base material. K7375) is a flexible laminate of 35 to 65%, the glass fabric has a porosity of 0 to 2.5%, and the crushed glass powder has an aspect ratio of 1 to 1.25 and a length. It is preferably 1 to 20 μm of irregular and irregularly reflecting particles, and the content thereof is preferably 1 to 20% by mass with respect to the light diffusing resin coating layer. The film material obtained by adopting such a configuration has non-flammability, has a high lighting effect, conceals the light source, and when the film material is covered with the light source, It is possible to obtain an effect of remarkably relieving the appearance defect of the shading shading due to partial relaxation of the shadow and woven structure or eye misalignment.

  The non-combustible film material for lighting cover of the present invention is provided with a functional layer containing a visible light responsive photocatalytic substance or an inorganic colloid substance supported on a binder component on the light diffusing resin coating layer. preferable. When the film material obtained by such a configuration is used for a film material for an illumination cover or a film material for an optical ceiling, the surface of the film material is exposed to the outside, and the glass fabric is exposed to the outside. When the lighting device is configured with the surface side facing the light source, it is possible to attach performances such as easy removal of attached dirt to the exposed surface, prevention of dust and pollen charging, and antibacterial / deodorant. .

  In the non-combustible film material for lighting cover of the present invention, in the flexible laminate, a functional layer containing a visible light responsive photocatalytic substance or an inorganic colloid substance supported on a binder component is provided on the glass fabric surface. It is preferable that When the film material obtained in such a configuration is used for a film material for a lighting cover or a film material for an optical ceiling, in particular, the glass fabric surface side of the film material is exposed to the outside, and the light diffusing resin coating is applied. When the lighting device is configured with the layer side facing the light source, it is possible to attach performances such as easy removal of adhered dirt to the exposed surface, prevention of dust and pollen charging, and antibacterial / deodorant. .

In the non-combustible film material for lighting cover of the present invention, the flexible laminate has a cone calorimeter test (ISO 5660-1), and radiant heat from an electric heater is directed to the flexible laminate at 50 kW / m ^2. The non-flammable requirement is that the total calorific value for 20 minutes after starting heating is 8 MJ / m ² or less and the maximum heating rate does not exceed 200 kW / m ² for 20 minutes after heating starts for 10 seconds or longer. It is preferable to have. The film material obtained by conforming to this test can be registered as the Minister of Land, Infrastructure, Transport and Tourism based on Article 2, Item 9 of the Building Standards Act as a material having fire prevention performance determined and announced by the Minister of Land, Infrastructure, Transport and Tourism.

  According to the present invention, it is a flexible laminate used for a film material for a lighting cover and a film material for an optical ceiling, has a high lighting effect and conceals a light source. A film material for lighting covers that produces a beautiful luminous appearance can be obtained by relieving the shading of knitted yarn and woven textures and the shading shading due to partial relaxation and uneven tension of the woven textures, and the Minister of Land, Infrastructure, Transport and Tourism. Has fire prevention performance (conforms to corn calorimeter test according to ISO 5660-1) and has been announced, and Iron Transport No. 81, MLIT Decree 151 and JNR 157, JNR 124, JNR The non-combustible film material for lighting covers according to the present invention can be combined with the non-combustible standard based on Tech No. 125, so that it can be fitted into ceilings of condominiums, stores, large commercial facilities, office buildings, facilities in stations / airports, underground streets, etc. base As a cover for a lighthouse, as a lighting cover for an internally illuminated signboard attached to them, as a ceiling lighting cover in an elevator car, in a railway vehicle, etc., as well as in a hotel entrance lounge party venue, ceremonial occasion, It can be suitably used for a light film ceiling structure that uses the entire ceiling of a large-scale space such as an event hall as illumination.

The figure which shows an example and example of a nonflammable film | membrane material for lighting covers of this invention The figure which shows an example and example of a nonflammable film | membrane material for lighting covers of this invention The figure which shows an example and example of a nonflammable film | membrane material for lighting covers of this invention The figure which shows an example and example of a nonflammable film | membrane material for lighting covers of this invention

  The incombustible film material for a lighting cover of the present invention has a total light transmittance (JIS K7375), in which a light diffusing resin coating layer containing crushed glass powder is provided on one surface of a glass fabric as a base material. ) Is a flexible laminate of 35 to 65%, the porosity of the glass fabric used for the substrate is 0 to 2.5%, and the crushed glass powder contained in the light diffusing resin coating layer is These are irregular and irregularly-reflecting particles having an aspect ratio of 1 to 1.25 and a length of 1 to 20 μm, the content of which satisfies the requirements of 1 to 20% by mass with respect to the light diffusing resin coating layer, and ISO Complies with the non-flammable requirements of the 5660-1 corn calorimeter test. Moreover, the usage method of the nonflammable film | membrane material for lighting covers of this invention may mount | wear with the light diffusable resin coating layer side facing a light source, or may mount | wear with the glass fabric surface side facing a light source. At this time, it is preferable that a functional layer is provided on the surface that does not face the light source, that is, the surface that is exposed as the illumination cover.

  As the glass fabric used for the base material of the non-combustible film material for lighting cover of the present invention, a woven fabric or a knitted fabric is used. Examples of the woven fabric include general-purpose woven fabrics such as plain weave, twill weave, satin weave and imitation weave. However, it is particularly preferable that the woven structure is a plain woven fabric with warp driving: 20 to 100 yarns / inch and weft driving: 20 to 100 yarns / inch. The plain woven fabric is not bulky due to the woven structure and has less surface unevenness, and the more yarns for warp driving and weft driving, the more the glass fabric has a Demonstrate the effect of making the shading of the woven tissue stand out. In addition, the plain woven fabric maintains the balance of the physical properties (Young's modulus / elongation) with respect to the mounting tension when it is used for the lighting cover, so the shape stability of the lighting cover is excellent. When such a glass fabric has a weave density of 0 to 2.5% of void density formed between the interlaces of the warp and weft yarns, when the lighting cover film material is placed on the light source, The effect that does not make the shadow stand out is high. The porosity is most preferably 0%, but a maximum of 2.5% is acceptable depending on the fineness of the glass fiber yarn used. When the porosity exceeds 2.5%, when the film material for the lighting cover is covered with a light source, only the light transmittance of the void portion becomes large, thereby causing the shading of the woven structure of the glass fabric to stand out, and the appearance of the lighting cover May make it worse. The porosity is an area occupancy ratio by the sum of a large number of fine voids formed between the interlaces of the warp and weft yarns, which are included in a specific area unit of the fabric (for example, 1 inch wide × 1 inch long square). First, the area ratio occupied by the warp and weft yarns contained in a specific area unit of the woven fabric may be obtained and obtained by subtracting this from 100% (%). For the purpose of improving the adhesion between the glass fabric and the light diffusing resin coating layer, it is preferable to subject the glass fabric to a surface treatment with a known silane coupling agent.

  The glass fiber yarn constituting the glass fabric may be any of various glass compositions such as E (non-alkali) glass, C (alkali-containing) glass, M glass, A glass, S glass, and D glass. A single yarn obtained by melt spinning to a filament diameter of 3 to 13 μm and twisting 0 to 5 times / inch on a strand obtained by converging 50 to 500 strands, in particular, a non-twisted yarn with 0 twists and a flat cross-sectional shape Flat yarn is most preferred. By using a non-twisted multifilament flat yarn, the porosity of the glass fabric can be brought close to 0 due to the advantage of having a wide yarn width at the same time as eliminating the light transmission unevenness. The effect which does not make the shadow of the woven structure of a glass fabric stand out can be set higher. When the number of strands exceeds 5 turns / inch, light refraction interferes with the spiral wave formed by twisting the multifilament, so that the light transmission shadow of the twisted portion is conspicuous and the appearance of the lighting cover may be deteriorated. Moreover, although the twisted yarn etc. which twisted these strands 2 or 3 by 1-5 times / inch can also be used, these increase a yarn diameter, make the thickness of a glass fabric bulky, and increase unevenness. For this reason, shading during light transmission may be prominent. The fineness of the glass fiber yarn used for the incombustible film material for lighting cover of the present invention is preferably a multifilament yarn of 150 to 1800 dtex, particularly 300 to 1350 dtex. These glass fiber yarns have a Mohs hardness of 6 to 6.5.

  The light diffusing resin coating layer provided on the glass fabric substrate is composed of a fluororesin, a fluorocopolymer resin (copolymer elastomer with two or more fluoromonomers), a fluorocopolymer resin (a fluoromonomer and no fluorine) Copolymerized elastomers by monomers, or elastomers obtained by graft polymerization of fluoropolymers on trunk polymers such as silicone resins, or elastomers obtained by graft polymerization of branch polymers such as silicone resins on fluororesins), fluororubbers, silicone resins, silicone copolymers Resin (copolymer elastomer with two or more siloxane monomers), silicone copolymer resin (copolymer elastomer with siloxane monomer and other monomers), silicone rubber, vinyl chloride resin, vinyl chloride copolymer resin (vinyl chloride) Monomer and other monomers That copolymerization elastomer), and the like chlorinated vinyl chloride resin, in particular a group a vinyl chloride resin may contain a chlorinated paraffin plasticizer component, a phosphoric acid ester as flameproofing agents. As resins other than these, the thickness of the light diffusing resin coating layer is adjusted within a range compatible with the corn calorimeter test (ISO 5660-1), and the olefin resin, olefin copolymer resin, urethane resin, urethane resin are adjusted. Polymer resin, acrylic resin, acrylic copolymer resin, styrene resin, styrene copolymer resin, polyester resin, polyester copolymer resin, polycarbonate resin, polyamide resin, and the like can also be used.

  The light diffusible resin coating layer preferably contains 1 to 20% by mass, particularly 3 to 10% by mass of crushed glass powder as a light diffuse reflector with respect to the mass of the light diffusable resin coating layer. The crushed glass powder is indeterminate and irregularly reflected particles having an aspect ratio of 1-1.35 and a particle length of 1-20 μm, and spherical particles (glass beads) are not included in this definition. Spherical particles (glass beads) are excellent in light diffusion effect evenly in all directions, but due to their properties, glass fabric thread streaks and shadows of woven tissue and partial woven texture that occur when the membrane material is exposed to a light source This is because the difference in shading such as shading due to relaxation or misalignment is not equalized. The crushed glass powder is irregular and irregularly-reflected particles obtained by crushing E (no alkali) glass, C (containing alkali) glass, M glass, A glass, S glass, D glass and the like with a ball mill or the like. The aspect ratio of the crushed glass powder is expressed by the ratio of the minimum value to the maximum value [maximum value (numerator) / minimum value (denominator)] depending on the vertical, horizontal, and height sizes of the crushed particles, excluding spheres. The aspect ratio may be 1. For example, the irregular and irregularly-reflecting particles having an aspect ratio of 1 can have a ratio of vertical, horizontal, and height of 1: 1: 1 in a form in which a corner of a cube is missing. The aspect ratio of the crushed glass powder is preferably in the range of 1 to 1.25, particularly 1 to 1.15. Although particles having an aspect ratio exceeding 1.25 can be used, it is difficult to obtain a crushed body having a particle size of 1 to 20 μm having such an aspect ratio. The size of the crushed glass powder is preferably in the range of 1 to 20 μm, particularly preferably 3 to 10 μm. If the powder size is less than 1 μm, the shading of the glass fabric generated when the membrane material is placed on the light source and the shadow and texture of the woven tissue In some cases, the equal effect of the light and shade differences such as partial relaxation of the tissue and shading due to eye misalignment may be poor. On the other hand, if the powder size exceeds 20 μm, the wear strength of the light diffusing resin coating layer may be deteriorated. These crushed glass powders have a Mohs hardness of 6 to 6.5.

  The reason for selecting crushed glass powder as the diffused light reflecting agent contained in the light diffusing resin coating layer provided adjacent to the glass fiber fabric substrate is to consider wear damage to the glass fiber due to rubbing of the diffused light reflecting agent. In the case of using a diffused light reflecting agent having a hardness greater than the Mohs hardness (6-6.5) of the glass fiber, the scratch on the filament surface of the glass fiber is easily broken by bending, and the glass fiber fabric itself is broken. This is because lowering the mechanical strength causes deterioration of the durability of the membrane material body. Therefore, a glass powder having the same Mohs hardness (Mohs hardness 6 to 6.5) was selected as the light diffuse reflector that contacts the glass fiber fabric substrate. In Patent Document 1 (Japanese Patent Laid-Open No. 2002-221609), quartz powder is used as a diffusing agent. However, since the Mohs hardness of quartz is 7, it is not suitable for use in contact with a glass fiber fabric. In addition, if the light diffusing agent is resin beads, there is no fear of abrasion due to the glass fiber, but the inclusion of flammable resin beads in the light diffusing resin coating layer makes it incompatible with the incombustibility test of ISO 5660-1. There is.

  The light diffusing resin coating layer is partly impregnated and formed on the glass fabric, and the one surface of the glass fabric is preferably coated with a thickness of 0.05 to 0.5 mm, particularly 0.1 to 0.25 mm. . If the coating thickness of the light diffusing resin coating layer is less than 0.05 mm, not only the shape and dimensional stability of the lighting cover will be deteriorated, but also the yarn streaks and texture of the glass fabric generated when the film material is covered with a light source. There are cases where the equal effect of shade differences such as shades of shades and shades due to partial relaxation of the texture and unevenness of the texture and unevenness of tension is sometimes poor. On the other hand, if the coating thickness exceeds 0.5 mm, the mass of the lighting cover is increased and handling properties are deteriorated, and it may become incompatible with the cone calorimeter test (ISO 5660-1). Such a light diffusing resin coating layer is formed using a gravure method, a knife coating method, a bar coating using a coating agent obtained by dissolving the resin described in [0019] in an organic solvent, or an emulsion solution of the resin described in [0019]. It can be carried out by a known coating means such as a coating method, a rotary screen transfer method, or a spray method. The crushed glass powder is preferably contained in an amount of 1 to 20% by mass, particularly 5 to 15% by mass with respect to the mass of the light diffusing resin coating layer. When the content of the crushed glass powder is less than 1% by mass with respect to the mass of the light diffusing resin coating layer, the thread of the glass fabric and the shadow of the woven tissue and the partial relaxation of the woven tissue that occur when the film material is covered with a light source. In some cases, the uniformity effect of the difference in shading, such as shading due to eye misalignment or eye misalignment, may be poor. On the other hand, when the content of the crushed glass powder exceeds 20% by mass, the wear strength and flexural strength of the light diffusing resin coating layer may be deteriorated.

  In the non-combustible film material for a lighting cover of the present invention, the light diffusing resin coating layer may contain a known additive as long as the total light transmittance (JIS K7375) of the film material maintains 35 to 65%. . Examples of additives include colorants, fluorescent whitening agents, fluorescent pigments, phosphorescent pigments, ultraviolet absorbers, antioxidants, heat stabilizers, light stabilizers, antistatic agents, flame retardants, fillers, crosslinking agents, Examples include antibacterial agents, antifungal agents, deodorants, and fragrances. When the total light transmittance of the film material of the present invention is less than 35%, when used for an illumination cover or an optical ceiling film, the illuminance with respect to the luminance of the light source becomes low, and the illumination effect becomes inefficient. On the other hand, if the total light transmittance of the film material exceeds 65%, the appearance and contour of the light source may be revealed when used for a lighting cover or a light ceiling film, and the appearance of the lighting device may be impaired. The total light transmittance of the film material is particularly preferably in the range of 40 to 55%. When the non-combustible film material for a lighting cover of the present invention is used for a lighting cover or a light ceiling film, the light diffusing resin coating layer side or the glass fabric surface side of the film material may be mounted facing the light source. .

  In the incombustible film material for lighting cover of the present invention, a functional layer containing a visible light responsive photocatalytic substance or an inorganic colloid substance supported on a binder component can be provided on the light diffusing resin coating layer. By providing such a functional layer, when the obtained film material is used for a film material for a lighting cover or a film material for an optical ceiling, in particular, the light diffusing resin coating layer surface side of the film material is exposed to the outside, When the lighting device is configured with the glass fabric surface facing the light source, it must be easy to remove the attached dirt on the exposed surface, prevent dust and pollen from being charged, and have antibacterial and deodorizing performance. Can do.

  The incombustible film material for lighting cover of the present invention can be provided with a functional layer containing a visible light responsive photocatalytic substance or an inorganic colloid substance supported on a binder component on the exposed glass fabric surface. By providing such a functional layer, when the obtained film material is used for a film material for a lighting cover or a film material for an optical ceiling, in particular, the glass fabric surface side of the film material is exposed to the outside, and light diffusibility is obtained. When the lighting device is configured with the resin coating layer side facing the light source, it must be easy to remove dirt on the exposed surface, prevent dust and pollen from being charged, and have antibacterial and deodorizing performance. Can do.

  The visible light responsive photocatalyst used for the functional layer is a photocatalytic substance that exhibits activity by absorbing visible light having a wavelength of 400 nm to 800 nm. These are specifically (a). Metal oxides such as titanium oxide, tungsten oxide, iron oxide, zinc oxide, indium oxide, vanadium oxide, bismuth oxide, iron-tungsten oxide, silver, platinum, gold, copper, rhodium, palladium, ruthenium, iridium, etc. A cocatalyst-added photocatalyst activated with a metal (compound) as a cocatalyst, (b). An anion-doped photocatalyst obtained by doping the photocatalytic metal oxide listed in (a) with nitrogen, carbon, sulfur, phosphorus, boron, fluorine or the like; (c). A cation-doped photocatalyst obtained by doping the photocatalytic metal oxide listed in (a) with a transition metal ion such as chromium, niobium, manganese, cobalt, vanadium, iron, or nickel; (d). A co-doped photocatalyst obtained by doping the photocatalytic metal oxide listed in (a) with both an anion and a cation, (e). A metal halide-supported photocatalyst in which a noble metal halide such as platinum, palladium or rhodium is supported on the photocatalytic metal oxide listed in (a), (f). For example, an oxygen deficient photocatalyst obtained by partially extracting oxygen from the photocatalytic metal oxide listed in (a) can be used. The thickness of the functional layer containing the visible light responsive photocatalyst is preferably 1 to 10 μm.

  The functional layer is formed by, for example, a method of forming a photocatalyst-containing layer by applying a coating agent containing visible light-responsive photocatalyst particles or sol and a binder, a photocatalyst-containing layer from a solution of a photocatalytic substance by a sol-gel method Can be formed by a known method such as a method of forming a photocatalyst-containing layer by a sputtering method, an ion plating method, a CVD method, or the like. These functional layer binders are difficult to be decomposed by a photocatalyst and have a film forming ability, for example, organic binders such as fluorine resins, silicone resins, acrylic fluorine copolymer resins, acrylic silicone copolymer resins, , A polysilazane, an organic silicate compound, or a hydrolyzate of a low condensate thereof (silanol group-containing silane compound) is preferably a silicon compound condensation layer, and silica sol and alumina sol as binder auxiliary agents. Any one or more of titanium sols can be included. The functional layer preferably contains 10 to 70% by mass, particularly 20 to 60% by mass, of the visible light responsive photocatalyst particles or sol.

  The inorganic colloid material used for the functional layer is preferably a silica (silicon oxide) sol, alumina (aluminum oxide) sol, zirconia (zirconium oxide) sol, or ceria (cerium oxide) sol having a primary particle diameter of 3 to 150 nm. , And a composite oxide (zinc oxide-antimony pentoxide composite or tin oxide-antimony pentoxide composite) sol. In particular, by using a zinc oxide-antimony pentoxide composite sol alone or in combination, a functional layer having antistatic properties can be formed, thereby facilitating the removal of dust, pollen, etc. adhering to the film material surface. These inorganic colloid materials are preferably used in the form of an aqueous dispersion or an organic solvent dispersion by blending with a binder resin solution. The binder resin solution is obtained by dissolving an emulsion resin or a synthetic resin in an organic solvent. In particular, the binder resin is preferably a resin exhibiting water repellency such as a fluorine-containing copolymer resin. Such fluorine-containing copolymer resins include vinyl fluoride (VF), vinylidene fluoride (VdF), trifluoroethylene (TrEE), tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE), hexafluoropropylene. These are obtained by copolymerizing two or more selected from fluoroolefin monomers such as (HFP), and these are specifically VdF-TFE copolymer resin, VdF-CTFE copolymer resin, VdF- HFP copolymer resin, TFE-CTFE copolymer resin, TFE-HFP copolymer resin, CTFE-HFP copolymer resin, VdF-TFE-CTFE copolymer resin, VdF-TFE-HFP copolymer resin, TFE-CTFE-HFP copolymer resin, VdF-CTFE-HFP copolymer resin, VdF An emulsion or organic solvent coating such as TFE-CTFE-HFP copolymer resin. The mass ratio of the solid content of the binder resin and the inorganic colloid material constituting the functional layer is in the range of 1: 1 to 1:10. The thickness of the functional layer containing the inorganic colloid material is preferably 1 to 10 μm.

  When the non-combustible film material for lighting cover of the present invention is used for a film material for lighting cover or a film material for light ceiling, the non-combustible film material for lighting cover of the present invention is the light diffusing resin coating layer side or the glass fabric surface side. Either front side (exposed side) may be used. Therefore, by applying a concealed design such as letters, designs, patterns, photographs, etc. partially or entirely on the light diffusing resin coating layer or glass fabric surface that is to be mounted opposite to the light source, that is, the non-exposed surface It is also possible to produce an unexpectedness such that the hidden design is transmitted through the film material and displayed on the surface (exposed surface) of the film material by turning on the light source. The hidden design can be applied by printing using a light-transmitting ink, for example, gravure printing, screen printing, ink jet printing, or the like. Since the hidden design is printed with light-transmitting ink, it is inherently affected by shade differences such as shading of the glass fabric and shading of the woven fabric, partial relaxation of the woven tissue, and shade shading due to misalignment. However, according to the use of the non-combustible film material for lighting cover of the present invention, it is not affected by such a difference in shading. The ink does not necessarily have to be light transmissive, and by printing a Japanese paper pattern with a light semi-transmissive white ink (or a diluted product of white ink), the Japanese paper pattern portion can be made into a thin shadow portion and a background film material. It is possible to obtain a Japanese paper lamp-like lighting cover as it is as a light-transmitting bright part.

  Specifically, the lighting cover covers the entire surface of the base light housing embedded in the ceiling of a building or railway vehicle (for example, 1 to 6 fluorescent lamps mounted: instrument width 15 to 45 cm × unit length 80 to 150 cm), illumination light source and film It is a film material that covers a material at a distance of 3 to 20 cm, and the coating is not limited to flat mounting, but may be curved three-dimensional mounting. In addition, a flat support frame or a three-dimensional support frame having a semicircular arc shape or a polygonal cross section is provided at the end of the film material, and a fitting member that can be freely attached to and detached from the fluorescent lamp housing is provided on the support frame. I have it. Further, specifically, it is an optical ceiling film in which a large number of lighting housings are arranged in a ceiling-embedded type or a ceiling-mounted type, and these lighting housings are collectively covered with a film material. The membrane material is increased in size by joining the original film material with a width of 1 to 3 m by sewing or bonding, or incorporating the original film material with a width of 1 to 3 m into the support frame and mechanically joining the support frames to each other. The distance between the light source and the film material is preferably 3 to 20 cm. The shape of the ceiling is not limited to a planar shape, and may be a curved shape. Moreover, the illumination cover of the present invention can also be used as an illumination cover for externally attached internal lighting signs attached to buildings. Moreover, the lighting cover of the present invention can be used as a desk lamp or a lamp lamp of a stand type with an arbitrary three-dimensional design. Light sources suitable for the lighting cover of the present invention include incandescent bulbs, halogen lamps, long bar fluorescent tubes, circle fluorescent tubes, ball built-in fluorescent tubes, long bar LED fluorescent tubes, ball built-in LED fluorescent tubes, and circle LED fluorescent tubes. There is no limitation on the type and form of the light source such as a tube, a light emitter in which a large number of LEDs are arbitrarily arranged, and an organic EL element.

In the non-combustibility (conforms to the cone calorimeter test according to ISO 5660-1) announced by the Minister of Land, Infrastructure, Transport and Tourism in the Building Standards Law, heating starts when radiant heat from an electric heater is irradiated at 50 kW / m ² toward the specimen. The total calorific value for 20 minutes after that is 8 MJ / m ² or less, and has a non-flammability requirement that the maximum heat generation rate does not exceed 200 kW / m ² for 20 minutes after heating starts for 10 seconds or more. In addition, the interior materials for railway vehicles include non-combustibility based on iron transportation No. 81, MLIT Decree 151 and JNR 157, JNR 124, JNR 125, and alcohol as a combustion source. The combustion behavior of the test specimen is divided into five stages, and the highest rank is satisfied.

[Transparent shadow evaluation of glass fabric]
The following evaluation was performed about the light transmittance of the film material created by the Example and the comparative example. The membrane material samples of the examples and comparative examples were all prepared by a test coater (experimental knife coating apparatus), and the glass plain weave fabric was handled manually, so that the glass plain weave fabric had a weave structure (33 warp driving density). Minor appearance defects due to structural disturbance (displacement due to partial relaxation and yarn streaks due to warp tension) were scattered in a part of / inch, weft driving density of 44 / inch: porosity 0%). Using the membrane material obtained using a glass plain weave fabric with these appearance defects, the entire surface of the ceiling-embedded fluorescent lamp housing (equipped with two 36 watt 40 type white fluorescent tubes: 25 cm wide x 125 cm long) Covered flat, the distance between the fluorescent tube and the membrane material was 3 cm. Visually observe the light transmission appearance of the membrane material at a distance of 50 cm from the surface of the membrane material when the fluorescent lamp is lit. A). Visibility of fluorescent tube, B). The presence or absence of shading of the glass fabric, the shading of the woven structure, and the partial shading of the woven structure or shading due to misalignment was evaluated. The housing mounting of the film material was evaluated in two ways: mounting with the light diffusing resin coating layer side exposed to the outside and mounting with the glass fabric surface side exposed to the outside.
A). Visibility of the fluorescent tube 1: It has sufficient illuminance and the presence of the fluorescent tube cannot be visually recognized. 2: Although it has sufficient illuminance, the position of the fluorescent tube can be visually recognized. 3: Although it has sufficient illuminance, it has fluorescence. The position of the tube can be clearly seen 4: The presence of the fluorescent tube cannot be visually recognized, but the illuminance is insufficient 5: The position of the fluorescent tube can be visually recognized and the illuminance is insufficient B). Shade of glass fabric 1: It has sufficient illuminance, and shadow shades of glass fabric defects cannot be visually recognized. 2: It has sufficient illuminance, but shadow shades of glass fabric defects can be visually blurred. 3: Sufficient illumination. However, the shading density of the glass fabric defect is clearly visible. 4: The shading density of the glass fabric defect is not visible, but the illuminance is insufficient. 5: The shading density of the glass fabric defect is visible. , Illuminance is also insufficient
[Nonflammability evaluation]
A) Corn calorimeter test (ISO 5660-1: 2002)
A test material with a surface of about 100 mm in length and width and a thickness of up to 50 mm and a flat surface.
10 minutes at 50 KW / m ² radiant heat. In the test, it was confirmed that the difference between the average value of the maximum heat generation rates of the three test materials and the maximum heat generation rate of each test material was less than 10%. Data. When it becomes 10% or more, further test material 3
The test is conducted on four sheets, and the data of four specimens excluding the maximum and minimum values of the maximum heat generation rate among these six specimens are adopted. Combustion determination is performed based on the total calorific value (MJ / m ² ), maximum heat generation rate (KW / m ² ), and ignition time (seconds) measured during the test time. The ignition time (seconds) is the time from the start of the test until the first ignition is confirmed, assuming that a flame exists for more than 10 seconds after the flame is confirmed from the specimen.
(A) Total calorific value: 8 MJ / m ² or less.
(B) Heat generation rate: Conforms to the one that does not exceed 200 kW / m ² continuously for 10 seconds or more.
(C) Appearance observation: Applicable to pinholes with no diameter exceeding 0.5 mm.
B) Material combustion test for railway vehicles: Iron fortune No. 81 (May 15, 1969)
Hold a B5-size specimen (182mm x 257mm) at a 45 ° angle so that the center of the bottom of the fuel container is at 25.4mm (1 inch) vertically below the center of the bottom of the specimen. Place on a base of low thermal conductivity material such as cork, put 0.5cc of pure ethyl alcohol, ignite, and leave until the fuel is burned out. Combustion judgment is divided into alcohol combustion and after combustion. During combustion, the specimen is observed for ignition, ignition, smoke generation, flame condition, etc. After combustion, afterflame, dust, Investigate the state of carbonization and deformation, and perform a five-step evaluation of “non-flammability”, “extreme flame retardancy”, “flame retardance”, “slow flame retardance”, and “flammability”.
* "Non-combustible" requirements During combustion: Ignition (none), Flame (none), Smoke (slight), Fire (-)
After combustion: residual flame (-), residual dust (-), carbonization (discoloration of 100mm or less)
・ Deformation (surface deformation of 100mm or less) ・ Melt dripping (none)

[Example 1]
A strand having a fineness of 600 dtex obtained by converging filaments with a diameter of 9 μm made of E glass is twisted at a rate of 1 / inch and flat yarn with a flat cross-sectional shape is used as warp and weft. A glass plain woven fabric (mass 210 g / m ² ) having a void density of 0% with a weaving density of 44 yarns / inch is used as a base material, and a light-diffusing resin coating layer according to <Formulation 1> is knife coated on one side of this base material. Method (including heat treatment and curing process at 180 ° C. for 3 minutes in an electric furnace) with an adhesion amount of 92 g / m ² , the lower layer of the light diffusing resin coating layer is impregnated and solidified on one surface of the glass plain weave fabric, and light diffusion The upper layer portion of the conductive resin coating layer was formed so as to cover one surface of the glass plain weave fabric. The obtained film material had a film thickness of 0.26 mm, a mass of 302 g / m ² , and a total light transmittance of 54.4%.

<Formulation 1> Light diffusing resin coating layer Product name: Shirasukon RTV4086A
(Two-component addition reaction curable silicone resin: 100% active ingredient: Toray Dow Corning)
50 parts by mass Product name: Shirasukon RTV4086B
(Two-component addition reaction curable silicone resin: 100% active ingredient: Toray Dow Corning)
50 parts by mass Product name: SRX212 CATALYST (manufactured by Dow Corning Toray) 1 part by mass Crushed glass powder (amorphous and irregularly reflective particles having an aspect ratio of 1 to 1.1 and a length of 5 to 8 μm)
10 parts by mass Toluene (diluent) 100 parts by mass

[Example 2]
Example 1 was the same as Example 1 except that the resin used for the light-diffusing resin coating layer of Example 1 was changed from a silicone resin to a fluororesin. That light-diffusing resin coating layer was deposited amount 102 g / ^{m 2} changed to <Formula 2> to <Formula 1>. The obtained film material had a film thickness of 0.25 mm, a mass of 312 g / m ² , and a total light transmittance of 53.5%.

<Formulation 2> Light diffusing resin coating layer Product name: Kyner Flex 2501-00 (manufactured by Arkema: Polyvinylidene fluoride-hexafluoropropylene copolymer resin: PVDF-HFP) 100 parts by mass Crushed glass powder (aspect ratio 1 to 1) 1.1, irregular and irregularly reflective particles with a length of 2-5μm)
20 parts by mass Toluene (diluent) 500 parts by mass

[Example 3]
The same procedure as in Example 1 was performed except that the resin used for the light diffusing resin coating layer in Example 1 was changed from a silicone resin to a soft vinyl chloride resin. That is, the light-diffusing resin coating layer was changed from <Formulation 1> to <Formulation 3> to an adhesion amount of 44 g / m ² . The obtained film material had a film thickness of 0.23 mm, a mass of 254 g / m ² , and a total light transmittance of 54.3%.

<Formulation 3> Light-diffusing resin coating layer emulsion polymerization polyvinyl chloride resin (degree of polymerization 1700) 100 parts by mass Tricresyl phosphate (plasticizer) 35 parts by mass Chlorinated paraffin (plasticizer) 15 parts by mass Antimony trioxide (flame retardant) ) 10 parts by weight Zinc stearate (stabilizer) 2 parts by weight Barium stearate (stabilizer) 2 parts by weight Crushed glass powder (amorphous and irregularly reflective particles having an aspect ratio of 1 to 1.1 and a length of 5 to 8 μm)
20 parts by mass

[Example 4]
A thickness of 0.26 mm was obtained in the same manner as in Example 1 except that a functional layer containing a visible light responsive photocatalytic substance composed of <Formulation 4> was provided on the surface of the light diffusing resin coating layer of Example 1. Mass 303.
A film material having 5 g / m ² and a total light transmittance of 54.2% was obtained. The functional layer was coated with <Formulation 4> with a 100-mesh gravure coater and dried at 120 ° C. for 2 minutes to obtain a layer thickness of 1 μm and 1.5 g.
It was formed with an adhesion amount of / m ² .

<Formulation 4> Functional layer (containing visible light responsive photocatalyst)
Product Name: Snowtex O ST-O
(Water-dispersed colloidal silica: solid content 20% by mass: manufactured by Nissan Chemical Industries, Ltd.) 100 parts by mass Methyltrimethoxysilane 20 parts by mass Tungsten oxide (WO ₃ ) fine particles 20 parts by mass Copper oxide (CuO) fine particles 5 parts by mass Diluting solvent ( 50 parts by mass of methyl alcohol)

[Example 5]
A thickness of 0.26 mm and a mass of 303.5 g were the same as in Example 1 except that a functional layer containing a visible light responsive photocatalytic substance composed of <Formulation 4> was provided on the surface of the glass fabric surface of Example 1. / M ² , and a film material having a total light transmittance of 54.2% was obtained. The functional layer was formed by applying <Formulation 4> with a 100 mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 6]
A thickness of 0.25 mm and a mass in the same manner as in Example 2 except that a functional layer containing a visible light responsive photocatalytic substance composed of <Formulation 4> is provided on the surface of the light diffusing resin coating layer of Example 2. A film material having 313.5 g / m ² and a total light transmittance of 53.5% was obtained. The functional layer was formed by applying <Formulation 4> with a 100 mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 7]
A thickness of 0.25 mm and a mass of 313.5 g were the same as in Example 2 except that a functional layer containing a visible light responsive photocatalytic substance composed of <Formulation 4> was provided on the surface of the glass fabric surface of Example 2. / M ² , and a film material having a total light transmittance of 53.5% was obtained. The functional layer was formed by applying <Formulation 4> with a 100 mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 8]
A thickness of 0.23 mm and a mass in the same manner as in Example 3 except that a functional layer containing a visible light responsive photocatalytic substance composed of <Formulation 4> was provided on the surface of the light diffusing resin coating layer of Example 3. A film material having 255.5 g / m ² and a total light transmittance of 54.3% was obtained. The functional layer was formed by applying <Formulation 4> with a 100 mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 9]
A thickness of 0.23 mm and a mass of 255.5 g were the same as in Example 3 except that a functional layer containing a visible light responsive photocatalytic substance composed of <Formulation 4> was provided on the surface of the glass fabric surface of Example 3. / M ² , and a film material having a total light transmittance of 54.3% was obtained. The functional layer was formed by applying <Formulation 4> with a 100 mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 10]
A thickness of 0.26 mm and a mass of 303.5 g / mass were obtained in the same manner as in Example 1 except that a functional layer containing an inorganic colloidal material consisting of <Formulation 5> was provided on the surface of the light diffusing resin coating layer of Example 1. A film material having m ² and a total light transmittance of 54.4% was obtained. The functional layer was formed by applying <Formulation 5> with a 100-mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

<Formulation 5> Functional layer (containing inorganic colloidal substance)
Product Name: Organosilica Sol MEK-ST
(MEK-dispersed colloidal silica: solid content 30% by mass: manufactured by Nissan Chemical Industries, Ltd.) 80 parts by mass Product name: Celnax CX-Z2101P-F2
(IPA-dispersed composite oxide sol: zinc oxide-antimony pentoxide sol) Solid content 20% by mass:
20 parts by mass Methyltrimethoxysilane 20 parts by mass Product name: Kyner Flex 2501-00 (manufactured by Arkema: Polyvinylidene fluoride-hexafluoropropylene copolymer resin: PVDF-HFP) 20 parts by mass Diluting solvent (Toluene) 100 parts by mass

[Example 11]
A thickness of 0.26 mm, a mass of 303.5 g / m ² , in the same manner as in Example 1, except that a functional layer containing an inorganic colloidal material consisting of <Formulation 5> was provided on the surface of the glass fabric surface of Example 1. A film material having a total light transmittance of 54.4% was obtained. The functional layer was formed by applying <Formulation 5> with a 100-mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 12]
A thickness of 0.25 mm and a mass of 313.5 g / mass were obtained in the same manner as in Example 2 except that a functional layer containing an inorganic colloidal material consisting of <Formulation 5> was provided on the surface of the light diffusing resin coating layer of Example 2. A film material having a m ² and a total light transmittance of 53.5% was obtained. The functional layer was formed by applying <Formulation 5> with a 100-mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 13]
A thickness of 0.25 mm, a mass of 313.5 g / m ² , in the same manner as in Example 2 except that a functional layer containing an inorganic colloidal material consisting of <Formulation 5> was provided on the surface of the glass fabric surface of Example ² . A film material having a total light transmittance of 53.5% was obtained. The functional layer was formed by applying <Formulation 5> with a 100 mesh gravure coater and drying at 120 ° C. for 2 minutes to a thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 14]
A thickness of 0.23 mm and a mass of 255.5 g were the same as in Example 3 except that a functional layer containing an inorganic colloidal material consisting of <Formulation 5> was provided on the surface of the light diffusing resin coating layer of Example 3. / M ² , and a film material having a total light transmittance of 53.5% was obtained. The functional layer was formed by applying <Formulation 8> with a 100 mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

[Example 15]
A thickness of 0.23 mm, a mass of 255.5 g / m ² , in the same manner as in Example 3, except that a functional layer containing an inorganic colloidal material consisting of <Formulation 5> was provided on the surface of the glass fabric surface of Example 3. A film material having a total light transmittance of 53.5% was obtained. The functional layer was formed by applying <Formulation 5> with a 100-mesh gravure coater and drying at 120 ° C. for 2 minutes to form a layer thickness of 1 μm and an adhesion amount of 1.5 g / m ² .

  The film materials of Examples 1 to 3 have a high lighting effect when used as a baselight lighting cover (or a light ceiling film material or an internally illuminated signboard), and also have a concealing effect that moderately hides the presence of a light source (fluorescent tube). Combined with the light diffusing effect, even though the total light transmittance is high (the illuminance is high), for example, the woven structure of the glass fiber base fabric (glass cloth) is disturbed, that is, a light part of the regular woven structure Even if there is static relaxation or misalignment, it is a beautiful light-transmitting appearance that does not cause the appearance of streaks or partial shading due to light transmission. Even if the light diffusing resin coating layer side is exposed outside in the housing mounting of the type signboard, the performance is equivalent even if the glass fabric surface side is exposed outside and mounted. The film material can be used well regardless of whether the front or back side is exposed to the outside. It became clear as possible. In addition, the film materials of Examples 1 to 3 are suitable for the non-combustibility of the corn calorimeter test (ISO 5660-1), and also to the non-combustibility of the material combustion test for railway vehicles (Tetsunyu No. 81). there were. Further, the film materials of Examples 4 and 5 were obtained by providing a functional layer containing a visible light responsive photocatalytic substance on one surface of the film material of Example 1 (light diffusing resin coating layer side or glass fabric surface side) Similarly, the film materials of Examples 6 and 7 are obtained by providing a functional layer containing a visible light responsive photocatalytic substance on one surface of the film material of Example 2 (light diffusing resin coating layer side or glass). Similarly, the membrane materials of Examples 8 and 9 are provided with a functional layer containing a visible light responsive photocatalytic substance on one surface of the membrane material of Example 3 (light diffusing resin coating layer side). Or the glass fabric surface side), and the film materials of Examples 4 to 9 have light transmission performance (beautiful appearance) equivalent to the film materials of Examples 1 to 3, and non-combustibility performance, and are also a visible light responsive photocatalyst. Photocatalytic property excited by visible light emitted from a fluorescent tube when the lighting is turned on by providing a functional layer containing a fluorescent substance Odor (body odor, animal odor, food odor, cigarette odor, chemical odor, etc.) ppm concentration is about 1 in 1 hour. The deodorizing effect was reduced to / 10 concentration. The film materials of Examples 10 and 11 were prepared by providing a functional layer containing an inorganic colloid substance on one surface of the film material of Example 1 (light diffusing resin coating layer side or glass fabric surface side). The film materials of Examples 12 and 13 were prepared by providing a functional layer containing an inorganic colloid substance on one surface of the film material of Example 2 (light diffusing resin coating layer side or glass fabric surface side). The film materials of Examples 14 and 15 are obtained by providing a functional layer containing an inorganic colloid substance on one surface of the film material of Example 3 (light diffusing resin coating layer side or glass fabric surface side). The film materials of Examples 10 to 15 have the light transmission performance (beautiful appearance) equivalent to the film materials of Examples 1 to 3 and nonflammability, and are provided with a functional layer containing an inorganic colloid substance, thereby providing a lighting cover (or Membrane material for optical ceiling) Dust, soot, pollen, etc. Even if accumulated dirt such as oil or cigarette dust is generated, wipe the surface with wiping paper (trade name Kimwipe: made by Nippon Paper Crecia) or wiping cloth (trade name: Zavina: made by KB Seiren) It was easy to remove.

[Comparative Example 1]
In Example 1, except for omitting 10 parts by mass of crushed glass powder (amorphous and irregularly reflective particles having an aspect ratio of 1 to 1.1 and a length of 5 to 8 μm) included in the light diffusing resin coating layer (formulation 1). In the same manner as in Example 1, a film material having a film thickness of 0.26 mm, a mass of 296 g / m ² and a total light transmittance of 69.8% was obtained.

[Comparative Example 2]
In Example 1, 10 parts by weight of crushed glass powder (amorphous and irregularly-reflective particles having an aspect ratio of 1 to 1.1 and a length of 5 to 8 μm) included in the light diffusing resin coating layer (formulation 1) was added to glass beads (aspect ratio). 1. Spherical particles having a length of 6 to 8 μm) A film material having a film thickness of 0.26 mm, a mass of 303 g / m ² and a total light transmittance of 55.3% in the same manner as in Example 1 except for changing to 10 parts by mass. Got.

[Comparative Example 3]
In Example 1, 10 parts by mass of crushed glass powder (amorphous and irregularly-reflective particles having an aspect ratio of 1 to 1.1 and a length of 5 to 8 μm) included in the light diffusing resin coating layer (formulation 1) was added to acrylic resin beads (aspect ratio). (Spherical particles having a ratio of 1 and a length of 6 to 8 μm) A film having a film thickness of 0.26 mm, a mass of 297 g / m ² , and a total light transmittance of 55.4%, except that it was changed to 10 parts by mass. The material was obtained.

[Comparative Example 4]
In Example 1, 10 parts by mass of crushed glass powder (amorphous and irregularly-reflective particles having an aspect ratio of 1 to 1.1 and a length of 5 to 8 μm) included in the light diffusing resin coating layer (formulation 1) was added to calcium carbonate (aspect ratio). 1. Spherical particles having a length of 0.2 μm) A film material having a film thickness of 0.26 mm, a mass of 300 g / m ² , and a total light transmittance of 32.2%, except for changing to 10 parts by mass. Got.

[Comparative Example 5]
In Example 1, 10 parts by mass of crushed glass powder (amorphous and irregularly reflective particles having an aspect ratio of 1 to 1.1 and a length of 5 to 8 μm) included in the light diffusing resin coating layer (formulation 1) was increased to 30 parts by mass. A film material having a film thickness of 0.26 mm, a mass of 310 g / m ² , and a total light transmittance of 53.8% was obtained in the same manner as in Example 1.

  The film material of Comparative Example 1 lacks the light diffusing effect and the presence of the fluorescent tube is conspicuous, and the film material of Comparative Example 2 uses the glass beads that are excellent in the light diffusing effect, so that the presence of the fluorescent tube is inconspicuous. However, spherical particles such as glass beads have a uniform light diffusing effect in all directions. Even if light and shade differences such as partial relaxation of shadows and textures and shadows due to misalignment are diffused evenly, these differences in density cannot be alleviated. And appearance defects such as shading of the woven structure, partial relaxation of the woven structure, and misalignment of eyes were observed. Similarly to the film material of Comparative Example 2, the film material of Comparative Example 3 used acrylic resin beads having an excellent light diffusing effect, and the presence of the fluorescent tube was inconspicuous. Due to the uniform light diffusing effect, the shadows of the yarn streaks and the woven tissue are not reduced, and the shade differences of the shading and the woven tissue of the glass fabric and the shading differences such as the partial relaxation of the woven tissue and the shading due to misalignment of the eyes are not reduced. The appearance defects such as partial relaxation and misalignment of the woven structure are visually recognized, and the nonflammability of the corn calorimeter test (ISO 5660-1) is obtained by using 10 parts by mass of flammable acrylic resin beads. And incombustibility of the material combustion test for railway vehicles (Tetsunyu No. 81). The film material of Comparative Example 4 has high concealability due to the use of calcium carbonate, the presence of the fluorescent tube cannot be visually recognized, and there are defects such as shading of the yarn and woven structure, partial relaxation of the woven structure, misalignment, etc. However, there was no problem in appearance such as being invisible, but by reducing the light transmittance of the film material, the amount of light through the illumination cover was reduced, resulting in poor illumination efficiency. Although the film material of Comparative Example 5 increased the amount of crushed glass powder to 30 parts by mass, the film material using 10 parts by mass has the effect of alleviating the shading density defects due to the light diffusion effect and disturbance of the woven structure of the glass fiber base fabric. On the contrary, the abrasion and bending strength of the light diffusing resin coating layer is deteriorated, and the crushed glass powder falls off, or the light transmission of the bent portion becomes a shadow of the chalk mark mark. It produced a drawback.

  According to the present invention, it is a flexible laminate used for a film material for an illumination cover (including an internally-illuminated signboard) and a film material for an optical ceiling, and has a high illumination effect and conceals a light source. Films for lighting covers that relieve the shading of glass fabrics and shading of glass fabrics, and the shading of shades due to partial relaxation and tension unevenness of the glass fabric, and produce a beautiful luminous appearance It has fire prevention performance (conforms to the corn calorimeter test according to ISO 5660-1) specified and announced by the Minister of Land, Infrastructure, Transport and Tourism, as well as Iron Transport No. 81, MLIT Decree No. 151 and JNR No. 157 And non-combustible standards based on JNR No. 124 and JNR No. 125, the non-combustible film material for lighting covers of the present invention can be used in apartments, stores, large commercial facilities, office buildings, stations and airports. Facilities, underground shopping streets, etc. Covers for ceiling-mounted base lights, cover lights for interior lighting signs attached to them, ceiling light covers in elevator cars, railway cars, etc., and entrance / lounge / partner halls of hotels, crowns It can be suitably used for optical ceiling structures that use the entire ceiling of large-scale spaces such as wedding halls and event halls as lighting.

1: Non-combustible film material for lighting cover 2: Glass fabric 3: Light diffusing resin coating layer 4: Shattered glass powder 5: Functional layer 6: Light source (fluorescent tube)

Claims (4)

  A flexible laminate having a total light transmittance (JIS K7375) of 35 to 65%, in which a glass fabric is used as a base material and a light diffusing resin coating layer containing crushed glass powder is provided on one side of the base material. The porosity of the glass fabric is 0 to 2.5%, and the crushed glass powder is irregular and irregularly reflective particles having an aspect ratio of 1 to 1.25 and a length of 1 to 20 μm, The content is 1-20 mass% with respect to the said light diffusable resin coating layer, The nonflammable film | membrane material for lighting covers characterized by the above-mentioned.   The nonflammable film material for a lighting cover according to claim 1, wherein a functional layer containing a visible light responsive photocatalytic substance or an inorganic colloid substance supported on a binder component is provided on the light diffusing resin coating layer.   The lighting cover according to claim 1, wherein in the flexible laminate, a functional layer containing a visible light responsive photocatalytic substance or an inorganic colloid substance supported on a binder component is provided on the glass fabric surface. Non-combustible film material. When the flexible laminate was irradiated with radiant heat from an electric heater at 50 kW / m ² toward the flexible laminate according to a cone calorimeter test (ISO 5660-1), the heating was started for 20 minutes. The total heat generation amount is 8 MJ / m ² or less, and has a non-flammability requirement that the maximum heat generation rate does not exceed 200 kW / m ² continuously for 10 seconds or more for 20 minutes after the start of heating. A non-combustible film material for a lighting cover according to the item.