TWI732996B - Transparent sheet, smoke prevention wall containing the transparent sheet, and method for manufacturing the transparent sheet - Google Patents

Abstract

The main purpose of the present invention is to provide a transparent sheet, which can increase the initial tearing strength and increase and maintain transparency when the glass fiber cloth in the transparent resin composite of glass fiber and resin is thinner. sex. The transparent sheet of the present invention includes: a glass fiber cloth with a thickness of 8-30 μm; a hardened resin composition layer contained in the glass fiber cloth in a state impregnated with the aforementioned glass fiber cloth; and a hardened resin composition layer laminated on the aforementioned hardened resin composition layer and containing polychloride Thermoplastic resin layer of thermoplastic resin other than vinyl resin.

Description

Transparent sheet, smoke prevention wall containing the transparent sheet, and method for manufacturing the transparent sheet

The present invention relates to a transparent sheet, particularly a transparent sheet suitable for use in an anti-smoke hanging wall, etc., an anti-smoke hanging wall using the same, and a manufacturing method of the transparent sheet.

The building standard law and the building standard law enforcement order stipulate that smoke exhaust equipment must be installed so as not to hinder the flow of dense smoke and poisonous gas generated when a building fires, so that evacuation and firefighting activities can be carried out smoothly. Therefore, in office buildings, commercial facilities and other buildings, there are many smoke-proof hanging walls as smoke exhaust equipment and smoke-proof equipment.

The anti-smoke wall is usually installed on the ceiling of the building, and its purpose is to temporarily block the flow of smoke and poisonous gas to the corridor or upper floor when a fire occurs, and to ensure the time required for evacuation. Therefore, in order not to obstruct the view of the smoke prevention wall and damage the aesthetics, the smoke prevention wall uses transparent plate glass, a transparent resin composite of glass fiber and resin, etc. The transparent resin composite of glass fiber and resin has the advantage that it is less susceptible to breakage than transparent plate glass. For example, Patent Document 1 discloses a transparent non-flammable sheet including a glass fiber fabric and a hardened resin layer.

In addition, for example, Patent Document 2 discloses a transparent non-combustible sheet having a substrate layer including a glass fiber cloth and a transparent hardening resin layer impregnated with the glass fiber cloth, and the substrate layer At least one side of the layer is integrally formed with a reinforcing layer. Prior Art Documents Patent Documents

Patent Document 1: Japanese Patent Laid-Open No. 2005-319746 Patent Document 2: Japanese Patent Laid-Open No. 2011-213093

Summary of the Invention Problems to be Solved by the Invention However, for example, the transparent incombustible sheet disclosed in Patent Document 1 has excellent incombustibility, but has problems of high haze and insufficient transparency.

The inventors of the present invention examined the reasons for the insufficient transparency of the aforementioned transparent non-combustible sheet. In addition, the inventors learned that, for example, the transparent non-combustible sheet specifically disclosed as an example in Patent Document 1 uses a thick glass fiber fabric with a thickness of about 100 μm for excellent non-combustibility. The refraction or reflection at the interface between the glass fiber and the hardened resin increases, resulting in insufficient transparency.

Therefore, the inventors of the present invention have tried to make the glass fiber fabric of the transparent non-combustible sheet disclosed in Patent Document 1 thinner, for example, 30 μm or less, in order to improve transparency. However, when the thickness of the glass fiber fabric of the transparent non-combustible sheet disclosed in Patent Document 1 is reduced, it is known that there is a problem that the tear strength, especially the initial tear strength, is easily deteriorated.

On the other hand, according to the transparent non-combustible sheet disclosed in Patent Document 2, since the reinforcing layer is integrally formed on at least one surface, the tear strength of the entire transparent non-combustible sheet can be maintained to a high degree. In addition, it is disclosed that a net body composed of glass fibers, a vinyl chloride resin film, or the like is used alone or in combination as a reinforcing layer. However, when a mesh body composed of glass fibers is used as a reinforcing layer, the haze will increase, and there is still a problem that high transparency cannot be obtained even when the manufacturing is completed. In addition, when a vinyl chloride resin film is used as a reinforcing layer, there are few problems in ordinary environments, but when used as a smoke prevention wall for a long period of time in, for example, a high temperature and humidity environment, there is a problem that transparency may not be maintained. In other words, in the conventional technology of a transparent composite of glass fiber and resin, the transparency and initial tearing strength exist immediately after manufacturing and after long-term use in a high temperature and humidity environment. As long as one performance increases, the other performance deteriorates. The mutual compensation relationship.

Under such circumstances, the main purpose of the present invention is to provide a transparent sheet, which can improve the initial tear strength when the glass fiber cloth in the transparent resin composite of glass fiber and resin is made thinner. It can easily improve the transparency after manufacturing and long-term use under high temperature and humidity environment. Means to solve the problem

The inventors of the present invention devoted themselves to research to solve the aforementioned problems. As a result, the inventors found that the transparent non-flammable sheet disclosed in Patent Document 2 uses a vinyl chloride resin film as a reinforcing layer and sometimes fails to maintain after long-term use as an anti-smoke wall in a high temperature and humidity environment, for example. The reason for the transparency is the bleed-out of the plasticizer contained in the vinyl chloride resin film.

That is, the inventors of the present invention found that the vinyl chloride resin film contains a large amount of plasticizer, and when it is laminated on the cured resin composition layer, if it is used as a smoke prevention wall for a long time in a high temperature and humidity environment, the The plasticizer transfers (overflows) and oozes out to the interface between the vinyl chloride resin film and the hardened resin composition layer, and sometimes the transparency cannot be maintained.

In addition, as a result of repeated reviews by the inventors, it was found that setting the thickness of the glass fiber cloth to 8~30μm can improve the transparency immediately after manufacture, and by adding thermoplastic resins other than polyvinyl chloride resins that do not contain plasticizers. The resin layer is a layer laminated on the hardened resin composition layer, and after long-term use as an anti-smoke wall in a high temperature and humidity environment, it can still maintain the transparency just after manufacturing and increase the initial tear strength. The present invention is completed based on these insights and further repeated reviews.

That is, the present invention provides inventions as disclosed below. Item 1. A transparent sheet comprising: a glass fiber cloth with a thickness of 8 to 30 μm; a hardened resin composition layer contained in the glass fiber cloth in a state impregnated with the aforementioned glass fiber cloth; and laminated on the aforementioned hardened resin composition layer and A thermoplastic resin layer containing a thermoplastic resin other than polyvinyl chloride resin. Item 2. The transparent sheet according to item 1, wherein the hardened resin composition layer is formed by hardening a resin composition containing acrylic slurry. Item 3. The transparent sheet of item 1 or 2, wherein the glass fiber cloth is a fabric, the glass yarn constituting the fabric has an average filament diameter of 3.5 to 4.5 μm, and the number of filaments is 20 to 110, and the foregoing The weaving density of the fabric is 80~120 threads/25mm regardless of warp and weft, thickness 9~30μm, and mass 9~35g/m ² . Item 4. The transparent sheet according to any one of items 1 to 3, wherein the total mass of the cured resin composition layer and the thermoplastic resin layer in the transparent sheet is 150 to 300 g/m ² . Item 5. The transparent sheet according to any one of items 1 to 4, wherein a peelable cover material that can be peeled off when used is laminated on the surface side of the thermoplastic resin layer, and the thermoplastic resin layer contains at least the surface side Antistatic agent. Item 6. For the transparent sheet of any one of items 1 to 5, the total light transmittance before and after the following promotion test is 90% or more and the haze is 3% or less. (Promotional test method) The transparent sheet is placed in a constant temperature and humidity machine, heated for 7 days in a humid environment with a humidity of 90% at 50°C, and dried and naturally cooled. Item 7. An anti-smoke hanging wall, including the transparent sheet of any one of items 1 to 6. Item 8. A method of manufacturing a transparent sheet, the transparent sheet comprising: a glass fiber cloth, a photocurable resin composition layer contained in the glass fiber cloth in a state impregnated with the glass fiber cloth, and a layer of the photocurable resin laminated on the photocurable resin The thermoplastic resin layer of the composition layer; the manufacturing method of the aforementioned transparent sheet includes the following steps: step A, preparing at least two translucent thermoplastic resin films laminated with translucent covering materials; and step B, by the aforementioned steps The two aforementioned thermoplastic resin films obtained in A sandwich the uncured light-curing resin composition impregnated with glass fiber cloth so that the light-transmitting covering material is located on the outside, and in this state, the uncured light The cured resin composition is irradiated with light to cure the aforementioned uncured photocurable resin composition. Invention effect

According to the present invention, it is possible to provide a transparent sheet, which can increase the initial tear strength when the glass fiber cloth in the composite of glass fiber and resin is made thinner, and can easily complete the manufacturing process. The transparency after long-term use in a high temperature and humidity environment (hereinafter collectively referred to as "transparency before and after use in a high temperature and humidity environment") is excellent. Therefore, the transparent sheet of the present invention is suitable for use in, for example, an anti-smoke hanging wall.

Modes for Carrying Out the Invention The transparent sheet of the present invention is characterized by comprising: a glass fiber cloth with a thickness of 8-30 μm; a hardened resin composition layer impregnated with the aforementioned glass fiber cloth; and a hardened resin composition layer laminated on the aforementioned hardened resin composition layer and containing poly Thermoplastic resin layer of thermoplastic resin other than vinyl chloride resin.

For example, as shown in FIG. 1, the transparent sheet 1 of the present invention has a laminated structure, including: a glass fiber cloth 2; a hardened resin composition layer 3 impregnated with glass fiber cloth 2; and a thermoplastic resin other than polyvinyl chloride resin (hereinafter, referred to as "Thermoplastic resin layer 4"). What is necessary is just to contain at least one layer of glass fiber cloth 2 in the transparent sheet 1, and may contain many layers.

In Fig. 1, the hardened resin composition layer 3 is filled in the gaps of most of the glass fibers constituting the glass fiber cloth 2. One surface side part (the hardened resin composition layer surface 31) and the other surface side part of the hardened resin composition layer 3 (The surface 32 of the cured resin composition layer) communicates with each other through the gap. In addition, in the transparent sheet 1 of the present invention, from the viewpoint of improving transparency, for example, as shown in FIG. 1, the hardened resin composition layer 3 is preferably formed on at least one surface of the layer of the glass fiber cloth 2. Preferably, the hardened resin composition layer 3 is formed on the surface of the glass fiber cloth 2 layer.

In addition, if necessary, the transparent sheet 1 of the present invention may be laminated with other layers on the surface side of the aforementioned thermoplastic resin layer 4. The other layer is, for example, as shown in FIG. In addition, as shown in FIG. 3, between the peelable cover material 5 and the thermoplastic resin layer 4 that are peeled off during use, for example, an antistatic layer 6 containing a metal or a metal compound may be laminated, and the antistatic layer 6 is made of The transparent sheet of the present invention is arranged in such a way that it becomes a surface layer when used as a smoke prevention wall. Hereinafter, the composition of each layer constituting the transparent sheet 1 of the present invention will be described in detail.

(Glass fiber cloth 2) In the transparent sheet 1 of the present invention, the glass fiber cloth 2 is composed of a large number of glass fibers. Many glass fibers in the glass fiber cloth 2 are entangled with each other to form a cloth. The glass fiber cloth 2 may be a glass fiber fabric (glass cloth) composed of many warp yarns and many weft yarns as an example. The weaving structure of the glass fiber fabric is not particularly limited, and examples include plain weave, satin weave, twill weave, diagonal weave, and border weave.

The glass material constituting the glass fiber of the glass fiber cloth 2 is not particularly limited, and a well-known glass material can be used as an example. Examples of glass materials include: alkali-free glass (E glass), acid-resistant alkali-containing glass (C glass), high-strength x high-elasticity glass (S glass, T glass, etc.), alkali-resistant glass (AR glass), etc. , It is better to use alkali-free glass (E glass) with high versatility. The glass fibers constituting the glass fiber cloth 2 may be composed of one type of glass material, or may be composed of a combination of two or more types of glass fibers composed of different glass materials. In addition, from the viewpoint of further enhancing transparency, it is better to select a glass material that is similar to the refractive index of the cured resin composition layer 3 described later.

The thickness of the glass fiber cloth in the transparent sheet 1 of the present invention is 8-30 μm. By making the glass fiber cloth thinner than the composite material of the transparent resin and glass cloth of the conventional technology, the non-flammable property can be maintained and the transparency before and after the transparent sheet is used in a high temperature and humidity environment can be improved. The aforementioned thickness is preferably 8-30 μm, preferably 9-20 μm, and particularly preferably 9-13 μm.

In addition, with regard to the invention of the transparent sheet 1, from the viewpoint of further reducing the haze before and after the transparent sheet is used in a high-temperature and high-humidity environment, and it is easier to prevent the resin contained in the transparent sheet from burning and the glass fiber cloth from the viewpoint of weaving defects In terms of view, it is better to make the following: glass fiber cloth fabric, the average filament diameter of the glass yarn constituting the aforementioned fabric is 3.5~4.5μm, the number of filaments is 20~110, and the weaving density of the aforementioned fabric regardless of warp and weft All are 80~120 roots/25mm, thickness 9~30μm, mass 9~35g/m ² .

In addition, in the aforementioned glass fiber fabric, from the viewpoint that it is easier to prevent the resin contained in the transparent sheet from burning the glass fiber cloth from the viewpoint of weaving defects, the thickness of the glass fiber fabric is divided by the diameter of the warp glass filaments and the diameter of the weft glass filaments. The average value (thickness of glass cloth/{(diameter of warp glass filament+diameter of weft glass filament)/2}) after the average value shows that the average number of segments is preferably in the range of 2.5 or more and less than 3.5.

For example, in the case of using the transparent sheet 1 of the present invention as a smoke prevention wall, the glass fiber cloth has the effect of preventing the spread of smoke when a fire occurs. In addition, when a fire occurs, hot air may be transmitted to the ceiling, and it is required to prevent the smoke from hanging down to prevent this from happening.

On the other hand, the thickness of the glass fiber fabric constructed as described above is approximately several times the average filament diameter, which is approximately several filaments. That is, the structure of the aforementioned glass fiber fabric also means that the filaments with a plurality of roots are widened in the plane direction of the glass fabric. Flattening the glass yarn containing a specific number of filaments with a specific filament diameter to make the glass fiber fabric have a specific thickness, thereby, compared with the round glass yarn that is not flattened, even if the resin component burns when a fire occurs, The texture is also less likely to be deformed, and it is easier to prevent large through holes from being generated. In addition, by making the structure of the glass fiber fabric as described above, the refraction and reflection of light incident on the transparent sheet can be reduced, and the transparency before and after use in a high temperature and humid environment can be further improved. The method of manufacturing the glass fiber fabric as mentioned above, for example, the glass yarn with an average filament diameter of 3.5~4.5μm and filament number 20~110 is woven with an air-jet shuttleless loom, etc. The weaving density is 80~ regardless of warp and weft. 120 strands/25mm, the tension of the glass fiber fabric in the warp direction is 50-100N/m, preferably 80-100N/m, and the water flow treatment with a pressure of about 1~3MPa is preferred.

From the same point of view, it is better to make the following: glass fiber cloth fabric, the average filament diameter of the glass yarn constituting the aforementioned fabric is 3.5~4.2μm, the number of filaments is 45~110, and the weaving of the aforementioned fabric The density is 85~105 threads/25mm regardless of warp and weft, thickness 9~30μm, and mass 9~35g/m ² ; it is better to make the following: the average filament diameter of the glass yarn constituting the aforementioned fabric is 3.5~4.5μm and length The number of filaments is 20~55, and the weaving density of the aforementioned fabric is 80~120 filaments/25mm regardless of warp and weft, thickness 9~13μm, and mass 9~15g/m ² ; it is particularly preferable to make the following: The average filament diameter of glass yarn is 3.5~4.2μm, the number of filaments is 45~55, and the weaving density of the aforementioned fabric is 85~105/25mm regardless of warp and weft, thickness 9~13μm, and mass 9~13g/m ² .

The difference in refractive index between the glass fiber cloth 2 and the cured resin composition layer 3 is preferably 0.02 or less, preferably 0.01 or less, and more preferably 0.005 or less. For example, the refractive index of the glass fiber cloth 2 is preferably about 1.45 to 1.65, and more preferably about 1.50 to 1.60.

In addition, the measurement of the refractive index of the aforementioned glass fiber cloth 2 is performed in accordance with the B method of JIS K 7142:2008. Specifically, the glass fibers constituting the glass fiber cloth 2 use diiodomethane (n _D ²³ 1.747), butyl phthalate (n _D ²³ 1.491) and dimethyl carbonate (n _D ²³ 1.366) as the immersion liquid, The NAR-2T manufactured by ATAGO was used as the Abbe refractometer, the sodium D-ray with a wavelength of 589nm was used as the light source, and the temperature was measured at 23°C. The average value of the number of 5 tests was used as the value of the refractive index. In addition, the measurement of the refractive index of the cured resin composition layer 3 is performed in accordance with the B method of JIS K 7142:2008. Specifically, the cured resin composition after curing is powdered, and diiodomethane (n _D ²³ 1.747), butyl phthalate (n _D ²³ 1.491) and dimethyl carbonate (n _D ²³ 1.366) are used as Soak the liquid, and use a small measuring microscope STM5-311 (manufactured by OLYMPUS, observation magnification 400 times) as a microscope, use sodium D-ray with a wavelength of 589nm as a light source, and measure at a temperature of 23°C. The value of the refractive index.

The difference in Abbe number between the glass fiber cloth 2 and the cured resin composition layer 3 is preferably 30 or less, preferably 20 or less, and more preferably 10 or less. The Abbe number of the glass fiber cloth 2 is preferably 30 to 80, preferably 40 to 70, and more preferably 50 to 65. In addition, the Abbe number system of the cured resin composition and glass fiber was measured as follows.

(The Abbe number of the hardened resin composition) Under the same conditions as when the glass fiber cloth is included, the hardened resin composition sheet without the glass fiber cloth is made into the same thickness, and the surface of the test piece is carefully polished to make it wide 8mm, length 20mm, and in accordance with the JIS K 7142A method, using NAR-2T manufactured by ATAGO as the Abbe refractometer, diiodomethane as the contact liquid, sodium D-ray with a wavelength of 589nm as the light source, and 23°C as the measuring temperature , Measure the refractive index at a wavelength of 589nm. Next, the dispersion value was measured and calculated using natural light as a light source, and the Abbe number was calculated by the following formula (I). Abbe number = (refractive index of wavelength 589nm-1)/dispersion value 　　　(I)

(The Abbe number of glass fiber) Use the glass material that constitutes the glass fiber to make a glass sheet with a width of 8mm, a length of 20mm, and a thickness of 5mm. The surface is carefully polished. According to the JIS K 7142A method, the NAR- made by ATAGO is used. 2T was used as an Abbe refractometer, diiodomethane was used as the contact liquid, sodium D-ray with a wavelength of 589nm was used as a light source, 23°C was used as the measurement temperature, and the refractive index at a wavelength of 589nm was measured. Next, natural light was used as a light source to measure and calculate the dispersion value, and the Abbe number was calculated by the aforementioned formula (I).

(Cured resin composition layer 3) In the transparent sheet 1 of the present invention, the cured resin composition layer 3 is formed of a cured product of a resin composition impregnated with a glass fiber cloth 2 described later and containing a curable resin. Specifically, the cured resin composition layer 3 is formed by applying energy such as light and heat to the resin composition containing the curable resin to harden the resin composition into a cured product.

From the viewpoint of further improving the transparency of the transparent sheet 1 before and after use in a high-temperature and high-humidity environment, the curable resin is preferably one that can make the refractive index of the cured resin composition layer 3 and the glass fiber cloth 2 similar. Preferred curable resins are those whose curable resin composition is photocurable. Examples include vinyl ester resins, urethane acrylate resins, stilbene acrylate resins, unsaturated polyester resins, and curable acrylic resins. , Epoxy resin, etc. Among them, from the viewpoint of further improving the adhesion with the thermoplastic resin layer 4, it is particularly preferable to harden a resin composition containing an acrylic slurry. In the present invention, the acrylic slurry refers to a polymerizable liquid mixture obtained by dissolving a (meth)acrylate polymer such as polymethyl methacrylate (PMMA) in an acrylic monomer such as methyl methacrylate. The aforementioned acrylic slurries are also selected from the group consisting of polymethyl methacrylate, methyl methacrylate/methyl acrylate copolymer, and methyl methacrylate/n-butyl acrylate copolymer. One or more types of acrylate polymers are preferably acrylic slurries in which methyl methacrylate monomers are dissolved. In this way, when the cured resin composition layer 3 is made by curing the resin composition containing acrylic syrup, the adhesion to the thermoplastic resin layer 4 can be further improved, so that the transparent sheet 1 can be further improved at high temperatures. The transparency before and after use in a wet environment is better. Furthermore, it is preferable that the cured resin composition layer 3 has no thermoplasticity.

The resin composition forming the cured resin composition layer 3 may further contain additives such as curing accelerators, flame retardants, ultraviolet absorbers, fillers, and antistatic agents. The flame retardant can be exemplified by aluminum hydroxide, magnesium hydroxide, trichloroethyl phosphate, triallyl phosphate, ammonium polyphosphate, and phosphoric acid ester. Examples of ultraviolet absorbers include benzotriazole. Examples of fillers include calcium carbonate, silica, and talc. Examples of antistatic agents include surfactants and the like. These additives may be used individually by 1 type, and may be used in combination of 2 or more types.

In the present invention, in order to improve the transparency before and after use of the transparent sheet 1 in a high-temperature and high-humidity environment, the refractive index of the glass fiber cloth 2 and the cured resin composition layer 3 described later are set to be similar. From such a viewpoint, the refractive index of the cured resin composition layer 3 is preferably about 1.45 to 1.65, preferably about 1.50 to 1.60, for example. In addition, in order to improve the transparency of the transparent sheet 1 before and after use in a high-temperature and high-humidity environment, it is preferable to set the Abbe numbers of the glass fiber cloth 2 and the cured resin composition layer 3 described later to be similar. From such a viewpoint, the Abbe number of the cured resin composition layer 3 is preferably 30 to 70, and more preferably 40 to 60.

In the transparent sheet 1 of the present invention, the mass of the cured resin composition layer 3 can be 20 to 100 g/m ² as an example. From the viewpoint of having both transparency and non-combustibility before and after use in a high temperature and humidity environment, It is better to take 20-50g/m ² as an example. In addition, the thickness of the cured resin composition layer may be 20 to 130 μm as an example. From the viewpoint of having both transparency and non-combustibility before and after use in a high-temperature and high-humidity environment, 30-60 μm is preferable as an example.

In the transparent sheet 1 of the present invention, the weight ratio of the glass fiber cloth 2 to the cured resin composition layer 3 is compared with the glass fiber cloth from the viewpoint of having both transparency and non-combustibility before and after use in a high-temperature and high-humidity environment. 2 and the total mass of the cured resin composition layer 3, the mass ratio of the glass fiber cloth 2 is preferably 5-50% by mass, preferably 10-35% by mass, and particularly preferably 10-25% by mass. In addition, the ratio of the total mass of the transparent sheet 1 (that is, the mass of the peelable cover material 5 removed) after the glass fiber cloth 2 has been peeled off the peelable cover material 5 when used (= the mass of the glass fiber cloth 2 (g)/Removing the mass of the peelable cover material 5 (g)×100(%)), for example, 3-20% by mass, preferably 3-15% by mass, and more preferably 3-10% by mass.

(Thermoplastic resin layer 4) In the transparent sheet 1 of the present invention, the thermoplastic resin layer 4 is laminated on the hardened resin composition layer 3 impregnated with glass fiber cloth 2. The transparent sheet 1 will remain transparent after long-term use in a high temperature and humidity environment Performance, and achieve the effect of improving the initial tear strength.

The thermoplastic resin layer 4 contains a thermoplastic resin other than polyvinyl chloride resin. Examples of thermoplastic resins other than polyvinyl chloride resins that can be thinned with a small amount of plasticizer, and preferably biaxially stretched films containing amorphous thermoplastic resins other than polyvinyl chloride resins. Examples of thermoplastic resins other than polyvinyl chloride resins include polyester resins, polycarbonate resins, and polyamide resins, and may include at least one or more of these. In addition, the thermoplastic resin layer 4 may not contain polyvinyl chloride resin. From the viewpoint of making the transparent sheet 1 more excellent in the initial tear strength, the thermoplastic resin layer 4 can take the example of the Emendorf tear growth resistance of 1N/mm or more in the longitudinal and transverse directions. 3~20N/mm is better, for example, 5~15N/mm is better. Among them, the thermoplastic resin layer 4 preferably contains a polyester resin from the viewpoint of better compatibility of chemical resistance (including alkali-resistant detergent when used as a smoke prevention wall), improvement of initial tear strength, and transparency. . The polyester resin can be exemplified by polyethylene terephthalate (PET) or polyethylene naphthalate (PEN). Furthermore, the Emendorf tear growth resistance means that the Emendorf tearing machine manufactured by Toyo Seiki Seisakusho Co., Ltd. is used to measure the tear strength (N) in accordance with JIS K7128-2×1998, and divide by the measured value The resistance (N/mm) is grown by the tear after the film thickness. In addition, the tear strength is the average value of the test results of 20 samples in the longitudinal direction and the transverse direction. The content of the plasticizer in the thermoplastic resin layer 4 may be, for example, 10% by mass or less, preferably 5% by mass or less, preferably 3% by mass or less, more preferably 1% by mass or less, preferably 0.5% by mass or less. The aforementioned plasticizers can cite well-known plasticizers for vinyl chloride resins, such as di-n-butyl phthalate, di-n-octyl phthalate, and di-2-ethylhexyl phthalate. , Diisooctyl phthalate, dioctyldecyl phthalate, diisodecyl phthalate, butyl benzyl phthalate, di-2-ethylhexyl isophthalate and other phthalic acids Plasticizers, fatty acid ester plasticizers such as 2-ethylhexyl adipate, di-2-decyl adipate, dibutyl sebacate, 2-ethylhexyl sebacate, etc. , Tributyl phosphate, tri-2-ethylhexyl phosphate, 2-ethylhexyl diphenyl phosphate, tricresyl phosphate and other phosphate plasticizers, tri-2-ethylhexyl trimellitate Esters, trimellitate plasticizers such as trioctyl trimellitate, adipic acid polyester plasticizers, phthalic acid polyester plasticizers and other polyester plasticizers, terephthalate Formic acid series plasticizer.

If necessary, surface treatments such as corona treatment, flame treatment, plasma treatment, etc. can be applied to the thermoplastic resin layer 4. In addition, coatings that impart various functions such as easy slippage and easy bonding can be provided to improve wear resistance. The hard coating and so on.

In the transparent sheet 1 of the present invention, the mass of each layer of the thermoplastic resin layer 4 can be 30~150g/m ² as an example. From the viewpoint of having both initial tear strength and non-combustibility, 50~90g/m2 m ^{2 is} better, preferably 60~80g/m ² . In addition, the thickness of the thermoplastic resin layer 4 may be 20-100 μm as an example. From the viewpoint of having both initial tearing strength and non-combustibility, 30-70 μm is preferable, and 40-60 μm is more preferable. Also, for example, when the thermoplastic resin layer 4 is laminated with other layers such as coatings that impart various functions such as slipperiness, easy adhesion, and antistatic properties, and/or hard coatings that improve wear resistance, the other layers The thickness can be 0.1~3μm as an example, preferably 0.1~1μm. As the film of the thermoplastic resin layer 4, it is preferable that it is excellent in transparency and smoothness. As the transparency of the film of the thermoplastic resin layer 4, for example, the total light transmittance (JIS K 7105: 1981) is preferably 90% or more, and more preferably 91 to 98%. Also, for example, the haze (JIS K 7105: 1981) is preferably 1.5% or less, and more preferably 0.3 to 1.0%.

(Releasable cover material 5) If necessary, the transparent sheet 1 of the present invention can be further laminated on the surface side of the thermoplastic resin layer 4 to peel off the cover material 5 when used. Thereby, for example, when the transparent sheet 1 of the present invention is used as a smoke-preventing wall, it is possible to prevent the transparent sheet 1 from being scratched during construction, which may cause a decrease in transparency or aesthetics.

And, as mentioned above, for example, the covering material 5 is installed in an installation where an anti-smoke wall is obligated to be installed by the Building Standards Law, for example, after the installation of the anti-smoke wall is completed (in other words, it is used as an anti-smoke wall)时) Peel off. On the other hand, when the covering material 5 was peeled off, the thermoplastic resin layer 4 and the covering material 5 were rubbed, causing the thermoplastic resin layer 4 to be electrostatically charged. It can be seen that dust and the like in the air adhere to the anti-smoke Wall surface. Therefore, when a peelable cover material 5 that can be peeled off during use is laminated on the surface side of the thermoplastic resin layer 4, by at least the surface side of the thermoplastic resin layer 4 containing an antistatic agent, the static electricity generated by peeling the cover material 5 can be further suppressed. , The excellent transparency of the transparent sheet 1 can be easily maintained, so it is better.

The aforementioned peelable covering material 5 can be used, for example: polyethylene film, polytetrafluoroethylene-based film, polypropylene film, surface-treated paper, etc., and as long as the covering material 5 is peeled off, the covering material 5 and the thermoplastic resin layer 4 can be used. The adhesive force may be smaller than the adhesive force of the thermoplastic resin layer 4 and the cured resin composition layer 3. Among them, if a translucent covering material is used as the peelable covering material 5, for example, when the resin composition forming the cured resin composition layer 3 is a photocurable cured resin composition, even when the cured resin composition is cured In the step of curing the resin composition, it is easy to prevent the deterioration of transparency or aesthetics, such as scars on the thermoplastic resin layer 4, which is preferable. The aforementioned light transmittance is not particularly limited as long as it can penetrate light that hardens the photocurable resin, and examples include those that can transmit light with a wavelength of 100 to 400 nm and those that can transmit light with a wavelength of 250 to 400 nm. The light transmittance of the covering material is measured by, for example, a UV transmittance measuring device (trade name UV3150 manufactured by Shimadzu Corporation), and the average transmittance between 250 and 400 nm is preferably 40% or more. More than 50% is preferred, and more than 60% is particularly preferred. Furthermore, the peelable cover material 5 that is peeled off during use is peeled off during use due to, for example, a smoke prevention wall, so the transparency and smoothness are not particularly limited. For example, from a cost point of view, the total light transmittance is about 80-95% (JIS K 7105: 1981), and the haze is about 2-10% (JIS K 7105: 1981).

(Antistatic layer 6) As shown in FIG. 3, in the transparent sheet 1 of the present invention, between the peelable cover material 5 and the thermoplastic resin layer 4 that can be peeled off during the aforementioned use, a layer containing, for example, a metal or a metal compound may be laminated The antistatic layer 6 is arranged in such a way that the transparent sheet of the present invention becomes a surface layer when used as an anti-smoke hanging wall. For example, when the transparent sheet 1 of the present invention is used as an anti-smoke hanging wall, from the viewpoint of rationality during lifting construction, it is better to laminate the peelable covering material 5. And, for example, when the smoke prevention wall is installed in a large facility such as a shopping mall, the covering material 5 will be peeled off in accordance with the business of the large facility (that is, when it is used as a smoke prevention wall). On the other hand, when the covering material 5 was peeled off, the thermoplastic resin layer 4 and the covering material 5 were rubbed, causing the thermoplastic resin layer 4 to be electrostatically charged. It can be seen that dust and the like in the air adhere to the anti-smoke Wall surface. Therefore, if the surface side of the thermoplastic resin layer 4 includes the antistatic layer 6, static electricity generated by peeling off the cover material 5 can be further suppressed, and the excellent transparency after the manufacture of the transparent sheet 1 can be easily maintained.

The antistatic agent contained in the aforementioned antistatic layer 6 can be any well-known one, for example, various cationic groups having cationic groups such as fourth-level ammonium salts, pyridinium salts, and first to third-level amino groups. Antistatic agent; anionic antistatic agent with anionic groups such as sulfonate base, sulfate ester base, phosphate ester base, and phosphonate base; amphoteric antistatic agent such as amino acid series and amino sulfate ester series ; Amino alcohol, glycerin, polyethylene glycol and other non-ionic antistatic agents and other surface active agent type antistatic agents; moreover, the polymer type antistatic agent after the antistatic agent is polymerized as the aforementioned antistatic agent Inorganic antistatic agents such as silver, tin oxide, zinc oxide, etc. In addition, monomers or oligomers that have a tertiary amino group or a fourth ammonium group and can be polymerized by ionizing radiation can also be used, for example, N,N-dialkylaminoalkyl (meth)acrylic acid Polymeric antistatic agents such as ester monomers and these fourth-level compounds. Among them, it is also preferable that the antistatic layer 6 contains a metal or a metal compound. Thereby, the surface resistivity of the transparent sheet 1 of the present invention can be further reduced, and the change of the surface resistivity of the transparent sheet 1 after being used in a high-temperature and high-humidity environment can be further reduced. In other words, when the antistatic layer 6 contains a metal or a metal compound, the antistatic agent will be more inhibited from overflowing, and the aforementioned effect can be achieved.

In the antistatic layer 6 containing a metal or a metal compound, the metal elements contained in it can be Ag, Ni, Cu, Sn, Sb, Al, In, Ti, etc. as examples, and can be a standard electrode made into a single metal Take metal elements with a potential less than 0eV as an example. Examples of the metal compound include metal oxides (antimony pentoxide, tin oxide, zinc oxide, indium oxide, antimony-doped indium oxide, tin-doped indium oxide, silver oxide, etc.). In addition, the antistatic layer 6 may be made to not contain fine particles composed of barium sulfate, calcium carbonate, aluminum oxide, magnesium silicate, glass, or the like. Examples of the metal or metal compound containing form include: making a thin film of metal or metal compound by vapor deposition, sputtering, plating, etc., or making a layer in which fine particles of the metal or metal compound are dispersed in a fixing resin. Examples of the shape of the aforementioned metal or metal compound fine particles include granular, flake, and needle (fibrous) shapes. The average particle diameter of the metal or metal compound fine particles is, for example, the average particle diameter obtained by the BET method (the specific surface area measured by the nitrogen adsorption method (m ² /g) is calculated by the usual method and the specific surface area diameter is calculated as the average The particle size) is below 100nm below the wavelength of visible light, preferably 1~100nm, which will make it easier to maintain the transparency of the transparent sheet 1.

When the antistatic layer 6 containing a metal or a metal compound is made to contain fine particles of a metal or a metal compound, it is preferable to include a fixing resin for fixing the fine particles of the metal or a metal compound to the substrate. That is, the antistatic layer 6 is preferably a layer containing a fixing resin and fine particles of a metal or metal compound dispersed in the fixing resin. Examples of fixing resins include polyurethane resins, polyester resins, acrylic resins, polyether resins, cellulose resins, polyvinyl alcohol resins, epoxy resins, and polyvinylpyrrolidone. , Polystyrene resin, polyethylene glycol, neopentyl erythritol, etc., particularly preferably polyurethane resin, polyester resin, and acrylic resin. The acrylic resin may be, for example, a modified acrylic resin (urethane modification, polyester modification, polycarbonate modification, fluorine modification, etc.). From the viewpoint of having the surface resistivity and transparency of the transparent sheet 1, the quality of the antistatic layer 6 can be, for example, 0.1-10 g/m ² per layer, and preferably 0.1-5 g/m ² . 0.1~3g/m ^{2 is} preferred, and 0.1~1g/m ^{2 is} particularly preferred. In addition, metals or metal compounds may exist on the surface of the thermoplastic resin layer 4. In addition, the thickness of the antistatic layer 6 can be, for example, 0.01 to 3 μm per layer, and preferably 0.05 to 1 μm. The mass ratio of the fixing resin to the metal or metal compound particles in the antistatic layer 6 (the mass of the fixing resin (g/m ² ): the mass of the metal or metal compound particles (g/m ² )) is composed of a transparent sheet From the viewpoint of surface resistivity and transparency of material 1, 10:1~1:1 is preferred, 8:1~2:1 is preferred, and 4:1~2:1 is particularly preferred. Moreover, the surface smoothness when the antistatic layer 6 containing a metal or a metal compound is provided, for example, the surface roughness Ra is 1 to 200 nm. Further, with respect to the total mass of the antistatic layer 6 (g / m ^2), and the metal mass of the metal compound fine particles (g / m ²⁾ may be cited as the ratio of 50 to 10% by mass, and at preferably 30 to 20 mass% .

(Physical properties and performance of the transparent sheet 1) Regarding the thickness of the transparent sheet 1 of the present invention, for example, the thickness of the transparent sheet 1 after peeling off the peelable cover material 5 that was peeled off during use (that is, removing the peelable cover The thickness of the material 5) is 100 to 300 μm, and preferably 150 to 200 μm. In addition, regarding the quality of the transparent sheet 1 of the present invention, for example, the quality of the transparent sheet 1 after the peelable cover material 5 that was peeled off during use has been peeled off (that is, the quality of the peelable cover material 5 removed) is: 100~400g/m ² , and preferably 150~300g/m ² . In addition, in the transparent sheet 1 of the present invention, the total mass of the cured resin composition layer and the thermoplastic resin layer is 150 to 300 g/m ² , preferably 150 to 200 g/m ² , which makes it easier to be both incombustible Properties and tear strength, so it is better.

In the transparent sheet 1 of the present invention, the thickness of the glass fiber cloth is 8-30 μm, and the thermoplastic resin layer 4 is laminated, so it can be used as a high-transparency one before and after use in a high-temperature and high-humidity environment. From the viewpoint of ensuring high transparency before and after use in a high temperature and humidity environment, the total light transmittance of the transparent sheet 1 of the present invention before use in a high temperature and humidity environment can be over 85%, for example, more than 90% Better. In addition, the haze of the transparent sheet 1 of the present invention before being used in a high temperature and high humidity environment can be 5% or less as an example, preferably 3% or less, preferably 1% or less. The total light transmittance and haze of the transparent sheet 1 are respectively the values measured by JIS K7375 2008 "Plastic-Method for obtaining total light transmittance and total light reflectance".

As mentioned above, in order to ensure high transparency before use in a high-temperature and high-humidity environment, in addition to setting the thickness of the glass fiber cloth to 8 to 30 μm, the following methods can also be cited: further reducing the glass fiber cloth 2 and the hardened resin composition layer 3 The difference in refractive index; set the glass fiber cloth as a fabric, the average filament diameter of the glass yarn constituting the aforementioned fabric is 3.5~4.5μm, the number of filaments is 20~55, and the weaving density of the aforementioned fabric is 80~120 regardless of warp and weft Root/25mm, thickness 9-15μm, mass 9-15g/m ² ; and the hardened resin composition layer 3 is made by hardening a resin composition containing acrylic slurry.

The total light transmittance of the transparent sheet 1 of the present invention after being used in a high-temperature and humid environment, for example, the total light transmittance of the transparent sheet 1 after the following promotion test is 85% or more, and 90% or more is taken as good. In addition, the haze of the transparent sheet 1 of the present invention after being used in a high temperature and high humidity environment, for example, the haze of the transparent sheet 1 after the following promotion test is 5% or less, and preferably 3% or less. 1% or less is preferable. (Promotional test method) Put the transparent sheet into a constant temperature and humidity machine, heat it for 7 days in a humid environment with a humidity of 90% and 50℃. After drying and natural cooling, use JIS K7375 2008 "Plastic-total light transmittance And the calculation method of total light reflectance" measurement.

As mentioned above, in order to ensure high transparency after use in a high temperature and humidity environment, in addition to the aforementioned method of ensuring high transparency before use in a high temperature and humidity environment and the thermoplastic resin layer 4 is made of thermoplastic resin other than polyvinyl chloride resin In addition, the amount of plasticizer contained in the thermoplastic resin layer 4 may be reduced, for example.

In the transparent sheet 1 of the present invention, since the thermoplastic resin layer 4 is provided, the initial tear strength can be made high. From the viewpoint of ensuring high initial tear strength, the initial tear strength is preferably 30-100 (N), preferably 40-100 (N), and particularly preferably 50-100 (N). In the present invention, the initial tear strength is measured and calculated as follows. (Test method) According to the C method (trapezoidal method) of 7.16 of JIS R 3420:2013, a test piece of 75mm×150mm in the longitudinal and transverse directions is taken from a transparent sheet and placed in two trapezoidal parts (corresponding to The trapezoid shown in Fig. 4 (part A) is attached with anti-slip tape (trade name 600S made by Sekisui Chemical Co., Ltd.) on both the front and back sides. When the cutting line is not drawn, the fixed-speed load-type tensile force is used. Test machine (trade name RTC-1310A manufactured by ORIENTEC Co., Ltd.) to measure the maximum load and make the average of the maximum longitudinal load and the maximum lateral load (=(maximum longitudinal load (N) + maximum lateral load (N))/2 ) As the initial tear strength (N).

Since the transparent sheet 1 of the present invention includes the glass fiber cloth 2, it can have non-flammable properties (non-flammability). In addition, the non-combustibility of the transparent sheet 1 of the present invention is based on 4.10.2 heat generation in the "Fire Resistance Test (Evaluation Practice Method)" of the Building Materials Testing Center of the General Incorporated Corporation. ^{Test × evaluation method, in the heat generation test where 50kW/m 2} of radiant heat is irradiated from the radiant electric heater to the surface of the sheet, the maximum heat generation rate after the start of heating lasts for more than 10 seconds and does not exceed 200kW/m ² , total heat generation The amount is preferably 8 MJ/m ² or less. In order to further improve the incombustibility, for example, the addition of a flame retardant or the reduction of the amount of organic matter may be performed in the hardened resin composition layer 3 and the thermoplastic resin layer 4.

The surface resistivity of the transparent sheet 1 of the present invention is preferably 1×10 ¹¹ Ω or less, preferably 1.0×10 ¹⁰ Ω or less, and more preferably 5.0×10 ⁹ Ω or less. Furthermore, the aforementioned surface resistivity is based on JIS K 6911 1995 5.13.2 after placing the transparent sheet in an environment with a temperature of 23° C. and a relative humidity of 50% RH for 15 minutes. The measuring device is made by Agilent Technologies Co., Ltd. High resistance meter 4339B, and external voltage 100V × 1 minute measurement.

(The manufacturing method of the transparent sheet of the present invention) The manufacturing method of the transparent sheet 1 of the present invention is not particularly limited, and the following manufacturing method can be given as an example. First, the glass fiber cloth 2 and the uncured cured resin composition constituting the cured resin composition layer 3 are prepared. The hardened resin composition is applied to a film (for example, polyester film, etc.) as the thermoplastic resin layer 4, and the glass fiber cloth 2 is placed on the hardened resin composition so that the hardened resin composition is impregnated with the glass fiber cloth 2, and further , Place another film as the thermoplastic resin layer 4 on the glass fiber cloth 2, and apply pressure from the surfaces of the two films to make the hardened resin composition more impregnated in the glass fiber cloth 2, and then by The hardened resin composition is hardened by heating or light irradiation to obtain a transparent sheet 1. The transparent sheet 1 is a glass fiber cloth 2 impregnated with a hardened resin composition layer 3 and a thermoplastic layer is laminated on the hardened resin composition layer 3 The resin layer 4 (the thermoplastic resin layer 4/the hardened resin composition layer 3/the transparent sheet 1 of the thermoplastic resin layer 4 contained in the state in which the glass fiber cloth 2 is impregnated in order).

When the resin composition is cured by applying heat energy, the heating temperature is not particularly limited, and may be, for example, about 50 to 200°C. In addition, when the resin composition is hardened by imparting light energy, the resin composition is irradiated with light to harden it. The conditions of irradiating light can be set to, for example, a cumulative light amount of 100 to 500 mJ/cm ² .

Also, for example, when the antistatic layer 6 is included on the surface side of the thermoplastic resin layer 4, the antistatic agent may be applied after the transparent sheet 1 is manufactured, or the film as the thermoplastic resin layer 4 may be subjected to antistatic treatment first. When the transparent sheet 1 of the present invention is intended to be laminated with a peelable cover material 5 that can be peeled off during use, the cover material 5 can be laminated after the transparent sheet 1 is obtained. In addition, a peelable cover material 5 is laminated in advance on a film as the thermoplastic resin layer 4 to integrate the two, and then the uncured hardened resin composition is applied to the surface of the thermoplastic resin layer 4 so that the cover material 5 is located on the outside. , And place the glass fiber cloth 2 on the hardened resin composition, so that the hardened resin composition is impregnated with glass fibers 2, and further, another sheet of the film that is the thermoplastic resin layer 4 is laminated with a peelable cover material 5 in advance When the two are integrated, the covering material 5 is placed on the glass fiber cloth 2 in such a way that the covering material 5 is located on the outside, and pressure is applied from the respective surfaces of the two films (that is, the covering material 5 surface) to form a hardened resin The material is further impregnated in the glass fiber cloth 2, and then the hardened resin composition is hardened by heating or light irradiation to obtain a transparent sheet 1. The transparent sheet 1 is a glass fiber cloth 2 impregnated with the hardened resin composition layer 3 Infiltrate, the hardened resin composition layer 3 is laminated with a thermoplastic resin layer 4 and the thermoplastic resin layer 4 is laminated with a peelable covering material 5 (layered in sequence with a peelable covering material 5/thermoplastic resin layer 4/in The transparent sheet 1) of the hardened resin composition layer 3 / the thermoplastic resin layer 4 / the peelable cover material 5 contained in the glass fiber cloth 2 in the state impregnated.

In addition, the manufacturing method of the transparent sheet of the present invention may be a method of manufacturing the following transparent sheet, the transparent sheet comprising: a glass fiber cloth, and a light-curing resin composition contained in the glass fiber cloth in a state impregnated with the glass fiber cloth Layer, and the thermoplastic resin layer laminated on the aforementioned light-curing resin composition layer; the method for manufacturing the transparent sheet includes the following steps: step A, preparing at least two light-transmitting thermoplastic resins laminated with light-transmitting covering materials Film; and step B, by using the two aforementioned thermoplastic resin films obtained in the aforementioned step A, the light-transmitting covering material is placed on the outer side of the light-curing resin composition impregnated with glass fiber cloth and not hardened, and in In this state, the uncured photocurable resin composition is irradiated with light to cure the uncured photocurable resin composition.

(Use of the transparent sheet of the present invention) The use of the transparent sheet of the present invention can be cited as an example of an anti-smoke wall. The smoke-proof hanging wall can cite the well-known transparent sheet using glass cloth and resin as an example. For example, a smoke-proof hanging wall has an installation track arranged on the ceiling surface of a building, and the upper end is kept at the aforementioned installation The transparent sheet suspended on the rail and a pair of end mullions arranged on both sides of the transparent sheet, and the transparent sheet is joined to the end mullions and can be freely separated. Among them, when the outermost layer of the transparent sheet of the present invention is the thermoplastic resin layer 4 when the smoke-proof wall is used, it can be processed by high-frequency welding, so it is suitable for tension-type smoke-proof wall applications. In the present invention, the tension-type smoke-proof hanging wall is a hanging wall formed by erecting a transparent non-combustible sheet between two pairs of mullions, which can be lifted from the ceiling and installed without a beam on the lower part of the transparent non-combustible sheet Take the anti-smoke hanging wall as an example. In addition, because it can replace glass, it is also suitable for other uses where glass is used, such as partitions, compartments, smoke-proof sheets, smoke-proof curtains (for example, users in factories, etc.), touch panels, etc. In addition, when the mass of the curable resin composition layer 3 is set to, for example, 20 to 100 g/m ² , preferably 20 to 50 g/m ² , the flexibility of the transparent sheet 1 of the present invention will be more excellent , It is easy to be used as a roll-shaped product. The length of the roll-shaped product in the longitudinal direction can be 5~300m as an example. [Example]

The following examples and comparative examples are used as examples to describe the present invention in detail. However, the present invention is not limited by the embodiments.

The hardened resin composition that constitutes the hardened resin composition layer 3 impregnated with glass fiber cloth is as shown in Table 1. Acrylic slurry is used (mixed with a mass ratio of 1:1 with the product name "ACRYSIRUP" manufactured by Ryoko Co., Ltd. XD-8005" (refractive index 1.550) and "ACRYSIRUP XD-8006" (refractive index 1.570)), vinyl ester resin (manufactured by U-Pica Co., Ltd., Japan), styrene monomer (manufactured by U-Pica Co., Ltd., Japan ), a mixture of bifunctional (meth)acrylate and photopolymerization initiator. In addition, as the bifunctional (meth)acrylate as a curing agent, NPGDA (neopentyl glycol diacrylate, molecular weight 212, (manufactured by U-Pica Co., Ltd., Japan)) described in Table 1 was used. In addition, the amount of the photopolymerization initiator is 2 parts by mass relative to 100 parts by mass of the total of the vinyl ester resin, styrene monomer, and bifunctional (meth)acrylate. The thermoplastic resin layer 4 uses a commercially available 2-axis stretched polyester film made by Toyobo Co., Ltd. (trade name "COSMOSHINE (registered trademark) A4300", thickness 50μm, mass 70g/m ² , total light transmittance (JIS K 7105) : 1981) 93%, haze (JIS K 7105: 1981) 0.9%), the vinyl chloride resin system uses a commercially available vinyl chloride resin film (manufactured by Okamoto Co., Ltd., general PVC#320, thickness 100μm, mass 120g/ m ² ). The peelable cover material 5 uses a polypropylene film (thickness 40 μm, mass 36 g/m ² ), and the peelable cover material releasably adheres to the thermoplastic resin layer using an acrylic adhesive. In addition, the peelable cover material 5 uses PET film (thickness 50μm, total light transmittance 93%, haze 4%). In addition, the antistatic layer 6 is provided by coating and drying the antistatic agent on one side of the aforementioned COMOSHINE (registered trademark) A4300 as the thermoplastic resin layer 4. The antistatic agent is made of tin oxide fine particles (average particle size). 20nm) was mixed and dispersed in a polyester resin as a fixing resin so that the mass ratio of the fixing resin to the tin oxide fine particles (fixing resin: tin oxide fine particles) was 75:25. The mass of the antistatic layer 6 after installation is 0.5 g/m ² , and the thickness is 0.4 μm.

<Example 1> (Manufacturing of glass fiber cloth 2) The warp and weft system used UNITAKA GLASS FIBER Co., Ltd. product name "ECBC3000 1/0 0.5Z" (average filament diameter 4μm, average filament number 50, The twist number is 0.5Z) and woven with an air-jet shuttleless loom to obtain a plain weave glass fiber fabric with a warp density of 95 strands/25mm and a weft density of 95 strands/25mm. Next, heating was performed at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. Afterwards, the surface treatment agent silane coupling agent (S-350: N-vinylphenyl-aminoethyl-γ-aminopropyl trimethoxysilane (hydrochloride) Chisso Co., Ltd.) was adjusted to 15g/ After squeezing the concentration of L with a dip dyeing machine, dry and bake at 120°C for 1 minute. In addition, the glass fiber fabric was subjected to a widening treatment twice with a water flow pressure of 1.5 MPa so that the tension of the glass fiber fabric was 100 N/m in the warp direction to obtain a glass fiber fabric. The resulting glass fiber fabric has a warp yarn density of 95 strands/25mm, a weft yarn density of 95 strands/25mm, a thickness of 13 μm, a mass of 12 g/m ² and a refractive index of 1.561.

(Releasable cover material laminated on thermoplastic resin) Laminate the polypropylene film mentioned above as the peelable cover material 5 that can be peeled off during use, laminated with an acrylic adhesive on one side, and dried on the aforementioned side to provide antistatic Layer 6 is the thermoplastic resin layer 4 on the antistatic layer 6 of COMOSHINE (registered trademark) A4300, so that the adhesive is located on the side of the antistatic layer 6 to obtain a peelable cover material 5/acrylic acid 6 acid that can be peeled off during use Ester adhesive/antistatic layer 6/Layered body A of COMOSHINE (registered trademark) A4300 as the thermoplastic resin layer 4. Prepare two laminates A.

(Production of transparent sheet) Cosmoshine (registered trademark) A4300 surface side (that is, the side opposite to the peelable cover material 5 that can be peeled off during use) of the laminated body A obtained above is coated as a hardened resin composition The cured resin composition described in Table 1 of layer 3. Next, the obtained glass fiber cloth 2 is placed on the cured resin composition as the cured resin composition layer 3, and it is left to stand for 1 minute so that the cured resin composition is impregnated in the gaps of the glass fiber cloth 2. Then, another laminate A obtained above is placed on the hardened resin composition layer with the COMOSHINE (registered trademark) A4300 surface side of the laminate A (ie, the side opposite to the peelable cover material 5 peeled off during use). It is placed on three sides, and the laminate A is pressurized with a roll so that the mass of the cured resin composition layer 3 becomes 40 g/m ² . After that, in the state of the peelable cover material 5 that has been peeled off during the laminated use, the cured resin composition as the cured resin composition layer 3 is irradiated with light using a black fluorescent lamp (trade name FL15BLB, manufactured by Toshiba Co., Ltd.) (Light irradiation conditions: cumulative light quantity 200mJ/cm ² ), the hardened resin composition is hardened to form a hardened resin composition layer 3, and the laminated structure shown in Figure 3 is obtained (the peelable cover material 5 that can be peeled off during use) /Acrylic adhesive that can be peeled off with the cover material 5/Antistatic layer 6/Thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300)/Composition of hardened resin contained in the state of impregnating glass fiber cloth 2 Transparent sheet of material layer 3 / thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300) / antistatic layer 6 / acrylate adhesive that can be peeled off with the cover material 5 / peelable cover material that can be peeled off during use 5) material. In the resulting transparent sheet, the cured resin composition layer 3 (the cured product of the resin composition) is impregnated in the gaps between the glass fibers of the glass fiber cloth, and the cured resin composition layer 3 is formed on both sides of the glass fiber cloth layer. .

<Example 2> (Manufacturing of glass fiber cloth 2) The warp and weft system used UNITAKA GLASS FIBER Co., Ltd. product name "ECBC3000 1/0 0.5Z" (average filament diameter 4μm, average filament number 50, The twist number is 0.5Z) and woven with an air-jet shuttleless loom to obtain a plain weave glass fiber fabric with a warp density of 95 strands/25mm and a weft density of 95 strands/25mm. Next, heating was performed at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. Afterwards, the surface treatment agent silane coupling agent (S-350: N-vinylphenyl-aminoethyl-γ-aminopropyl trimethoxysilane (hydrochloride) Chisso Co., Ltd.) was adjusted to 15g/ After squeezing the concentration of L with a dip dyeing machine, dry and bake at 120°C for 1 minute. In addition, the glass fiber fabric was subjected to a widening treatment twice with a water flow pressure of 1.5 MPa so that the tension of the glass fiber fabric was 100 N/m in the warp direction to obtain a glass fiber fabric. The resulting glass fiber fabric has a warp yarn density of 95 strands/25mm, a weft yarn density of 95 strands/25mm, a thickness of 13 μm, a mass of 12 g/m ² and a refractive index of 1.561.

(Releasable cover material laminated on thermoplastic resin) Laminate the polypropylene film mentioned above as the peelable cover material 5 that can be peeled off during use, laminated with an acrylic adhesive on one side, and dried on the aforementioned side to provide antistatic Layer 6 is the thermoplastic resin layer 4 on the antistatic layer 6 of COMOSHINE (registered trademark) A4300, so that the adhesive is located on the side of the antistatic layer 6 to obtain a peelable cover material 5/acrylic acid 6 acid that can be peeled off during use Ester adhesive/antistatic layer 6/Layered body A of COMOSHINE (registered trademark) A4300 as the thermoplastic resin layer 4. Prepare two laminates A.

(Production of transparent sheet) Cosmoshine (registered trademark) A4300 surface side (that is, the side opposite to the peelable cover material 5 that can be peeled off during use) of the laminated body A obtained above is coated as a hardened resin composition The cured resin composition described in Table 1 of layer 3. Next, the obtained glass fiber cloth 2 is placed on the cured resin composition as the cured resin composition layer 3, and it is left to stand for 1 minute so that the cured resin composition is impregnated in the gaps of the glass fiber cloth 2. Then, another laminate A obtained above is placed on the hardened resin composition layer with the COMOSHINE (registered trademark) A4300 surface side of the laminate A (ie, the side opposite to the peelable cover material 5 peeled off during use). It is placed on three sides, and the laminate A is pressurized with a roll so that the mass of the cured resin composition layer 3 becomes 40 g/m ² . After that, in the state of the peelable cover material 5 that has been peeled off during the laminated use, the cured resin composition as the cured resin composition layer 3 is irradiated with light using a black fluorescent lamp (trade name FL15BLB, manufactured by Toshiba Co., Ltd.) (Light irradiation conditions: cumulative light quantity 200mJ/cm ² ), the hardened resin composition is hardened to form a hardened resin composition layer 3, and the laminated structure shown in Figure 3 is obtained (the peelable cover material 5 that can be peeled off during use) /Acrylic adhesive that can be peeled off with the cover material 5/Antistatic layer 6/Thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300)/Composition of hardened resin contained in the state of impregnating glass fiber cloth 2 Transparent sheet of material layer 3 / thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300) / antistatic layer 6 / acrylate adhesive that can be peeled off with the cover material 5 / peelable cover material that can be peeled off during use 5) material. In the resulting transparent sheet, the cured resin composition layer 3 (the cured product of the resin composition) is impregnated in the gaps between the glass fibers of the glass fiber cloth, and the cured resin composition layer 3 is formed on both sides of the glass fiber cloth layer. .

<Example 3> (Manufacturing of glass fiber cloth 2) The warp and weft system used UNITAKA GLASS FIBER Co., Ltd. product name "ECBC3000 1/0 0.5Z" (average filament diameter 4μm, average filament number 50, The twist number is 0.5Z) and woven with an air-jet shuttleless loom to obtain a plain weave glass fiber fabric with a warp density of 95 strands/25mm and a weft density of 95 strands/25mm. Next, heating was performed at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. Afterwards, the surface treatment agent silane coupling agent (S-350: N-vinylphenyl-aminoethyl-γ-aminopropyl trimethoxysilane (hydrochloride) Chisso Co., Ltd.) was adjusted to 15g/ After the concentration of L is squeezed with a dip dyer, it is dried and baked at 120°C for 1 minute to obtain a glass fiber fabric (that is, no widening treatment is applied). The resulting glass fiber fabric had a warp yarn density of 95 strands/25mm, a weft yarn density of 95 strands/25mm, a thickness of 15 μm, a mass of 12 g/m ² and a refractive index of 1.561.

(Releasable cover material laminated on thermoplastic resin) Laminate the polypropylene film mentioned above as the peelable cover material 5 that can be peeled off during use, laminated with an acrylic adhesive on one side, and dried on the aforementioned side to provide antistatic Layer 6 is the thermoplastic resin layer 4 on the antistatic layer 6 of COMOSHINE (registered trademark) A4300, so that the adhesive is located on the side of the antistatic layer 6 to obtain a peelable cover material 5/acrylic acid 6 acid that can be peeled off during use Ester adhesive/antistatic layer 6/Layered body A of COMOSHINE (registered trademark) A4300 as the thermoplastic resin layer 4. Prepare two laminates A.

(Production of transparent sheet) Cosmoshine (registered trademark) A4300 surface side (that is, the side opposite to the peelable cover material 5 that can be peeled off during use) of the laminated body A obtained above is coated as a hardened resin composition The cured resin composition described in Table 1 of layer 3. Next, the obtained glass fiber cloth 2 is placed on the cured resin composition as the cured resin composition layer 3, and it is left to stand for 1 minute so that the cured resin composition is impregnated in the gaps of the glass fiber cloth 2. Then, another laminate A obtained above is placed on the hardened resin composition layer with the COMOSHINE (registered trademark) A4300 surface side of the laminate A (ie, the side opposite to the peelable cover material 5 peeled off during use). On the third side, the layered body A was pressurized with rolls so that the mass of the cured resin composition layer 3 was 40 g/m ² . After that, in the state of the peelable cover material 5 that has been peeled off during the laminated use, the cured resin composition as the cured resin composition layer 3 is irradiated with light using a black fluorescent lamp (trade name FL15BLB, manufactured by Toshiba Co., Ltd.) (Light irradiation conditions: cumulative light quantity 200mJ/cm ² ), the hardened resin composition is hardened to form a hardened resin composition layer 3, and the laminated structure shown in Figure 3 is obtained (the peelable cover material 5 that can be peeled off during use) /Acrylic adhesive that can be peeled off with the cover material 5/Antistatic layer 6/Thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300)/Composition of hardened resin contained in the state of impregnating glass fiber cloth 2 Transparent sheet of material layer 3 / thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300) / antistatic layer 6 / acrylate adhesive that can be peeled off with the cover material 5 / peelable cover material that can be peeled off during use 5) material. In the resulting transparent sheet, the cured resin composition layer 3 (the cured product of the resin composition) is impregnated in the gaps between the glass fibers of the glass fiber cloth, and the cured resin composition layer 3 is formed on both sides of the glass fiber cloth layer. .

<Example 4> (Manufacturing of glass fiber cloth 2) The warp and weft system used UNITAKA GLASS FIBER Co., Ltd. product name "ECC1200 1/0 1.0Z" (average filament diameter 4.5μm, average filament number 100) , Twist number 1.0Z), woven with an air-jet shuttleless loom to obtain a plain woven glass fiber fabric with a warp yarn density of 90 strands/25mm and a weft yarn density of 90 strands/25mm. Next, heating was performed at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. Afterwards, the surface treatment agent silane coupling agent (S-350: N-vinylphenyl-aminoethyl-γ-aminopropyl trimethoxysilane (hydrochloride) Chisso Co., Ltd.) was adjusted to 15g/ After squeezing the concentration of L with a dip dyeing machine, dry and bake at 120°C for 1 minute. In addition, the glass fiber fabric was subjected to a widening treatment once with a water flow process at a pressure of 1.5 MPa so that the tension of the glass fiber fabric was 100 N/m in the warp direction to obtain a glass fiber fabric. The resulting glass fiber fabric had a warp yarn density of 90 yarns/25mm, a weft yarn density of 90 yarns/25mm, a thickness of 27 μm, a mass of 30 g/m ² and a refractive index of 1.561.

(Releasable cover material laminated on thermoplastic resin) Laminate the polypropylene film mentioned above as the peelable cover material 5 that can be peeled off during use, laminated with an acrylic adhesive on one side, and dried on the aforementioned side to provide antistatic Layer 6 is the thermoplastic resin layer 4 on the antistatic layer 6 of COMOSHINE (registered trademark) A4300, so that the adhesive is located on the side of the antistatic layer 6 to obtain a peelable cover material 5/acrylic acid 6 acid that can be peeled off during use Ester adhesive/antistatic layer 6/Layered body A of COMOSHINE (registered trademark) A4300 as the thermoplastic resin layer 4. Prepare two laminates A.

(Production of transparent sheet) Cosmoshine (registered trademark) A4300 surface side (that is, the side opposite to the peelable cover material 5 that can be peeled off during use) of the laminated body A obtained above is coated as a hardened resin composition The cured resin composition described in Table 1 of layer 3. Next, the obtained glass fiber cloth 2 is placed on the cured resin composition as the cured resin composition layer 3, and it is left to stand for 1 minute so that the cured resin composition is impregnated in the gaps of the glass fiber cloth 2. Then, another laminate A obtained above is placed on the hardened resin composition layer with the COMOSHINE (registered trademark) A4300 surface side of the laminate A (ie, the side opposite to the peelable cover material 5 peeled off during use). It is placed on three sides, and the laminate A is pressurized with a roll so that the mass of the cured resin composition layer 3 becomes 90 g/m ² . After that, in the state of the peelable cover material 5 that has been peeled off during the laminated use, the cured resin composition as the cured resin composition layer 3 is irradiated with light using a black fluorescent lamp (trade name FL15BLB, manufactured by Toshiba Co., Ltd.) (Light irradiation conditions: cumulative light quantity 200mJ/cm ² ), the hardened resin composition is hardened to form a hardened resin composition layer 3, and the laminated structure shown in Figure 3 is obtained (the peelable cover material 5 that can be peeled off during use) /Acrylic adhesive that can be peeled off with the cover material 5/Antistatic layer 6/Thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300)/Composition of hardened resin contained in the state of impregnating glass fiber cloth 2 Transparent sheet of material layer 3 / thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300) / antistatic layer 6 / acrylate adhesive that can be peeled off with the cover material 5 / peelable cover material that can be peeled off during use 5) material. In the resulting transparent sheet, the cured resin composition layer 3 (the cured product of the resin composition) is impregnated in the gaps between the glass fibers of the glass fiber cloth, and the cured resin composition layer 3 is formed on both sides of the glass fiber cloth layer. .

<Comparative Example 1> (Manufacturing of Glass Fiber Cloth 2) The warp and weft system used UNITAKA GLASS FIBER Co., Ltd. product name "ECBC3000 1/0 0.5Z" (average filament diameter 4μm, average filament number 50, The twist number is 0.5Z) and woven with an air-jet shuttleless loom to obtain a plain weave glass fiber fabric with a warp density of 95 strands/25mm and a weft density of 95 strands/25mm. Next, heating was performed at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. Afterwards, the surface treatment agent silane coupling agent (S-350: N-vinylphenyl-aminoethyl-γ-aminopropyl trimethoxysilane (hydrochloride) Chisso Co., Ltd.) was adjusted to 15g/ After squeezing the concentration of L with a dip dyeing machine, dry and bake at 120°C for 1 minute. In addition, the glass fiber fabric was subjected to a widening treatment twice with a water flow pressure of 1.5 MPa so that the tension of the glass fiber fabric was 100 N/m in the warp direction to obtain a glass fiber fabric. The resulting glass fiber fabric has a warp yarn density of 95 strands/25mm, a weft yarn density of 95 strands/25mm, a thickness of 13 μm, a mass of 12 g/m ² and a refractive index of 1.561.

(Production of transparent sheet) The cured resin composition described in Table 1 was applied to one sheet of the aforementioned vinyl chloride resin film. Next, the glass fiber cloth 2 obtained above is placed on the cured resin composition, and it is allowed to stand for 1 minute so that the resin is impregnated into the gaps of the glass fiber cloth 2. Then, another piece of the aforementioned vinyl chloride resin film was placed on it, and the weight of the hardened resin composition layer 3 was 40 g/m ^{2 by} pressing it with a roller. After that, for each vinyl chloride resin film, the cured resin composition was irradiated with light using a black fluorescent lamp (trade name FL15BLB manufactured by Toshiba Co., Ltd.) (light irradiation conditions: cumulative light quantity 200mJ/cm ² ) to cure the resin composition It is cured to form a cured resin composition layer, and a transparent sheet is obtained. In the resulting transparent sheet, the cured resin composition layer 3 (the cured product of the resin composition) is impregnated in the gaps between the glass fibers of the glass fiber cloth 2, and the cured resin composition is formed on both sides of the glass fiber cloth 2 layers Layer 3.

<Comparative Example 2> (Manufacturing of Glass Fiber Cloth 2) The warp and weft system used UNITAKA GLASS FIBER Co., Ltd. product name "ECBC3000 1/0 0.5Z" (average filament diameter 4μm, average filament number 50, The twist number is 0.5Z) and woven with an air-jet shuttleless loom to obtain a plain weave glass fiber fabric with a warp density of 95 strands/25mm and a weft density of 95 strands/25mm. Next, heating was performed at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. Afterwards, the surface treatment agent silane coupling agent (S-350: N-vinylphenyl-aminoethyl-γ-aminopropyl trimethoxysilane (hydrochloride) Chisso Co., Ltd.) was adjusted to 15g/ After squeezing the concentration of L with a dip dyeing machine, dry and bake at 120°C for 1 minute. In addition, the glass fiber fabric was subjected to a widening treatment twice with a water flow pressure of 1.5 MPa so that the tension of the glass fiber fabric was 100 N/m in the warp direction to obtain a glass fiber fabric. The resulting glass fiber fabric has a warp yarn density of 95 strands/25mm, a weft yarn density of 95 strands/25mm, a thickness of 13 μm, a mass of 12 g/m ² and a refractive index of 1.561.

(Production of transparent sheet) The cured resin composition described in Table 1 was coated on a PET film with a thickness of 50 μm as the peelable cover material 5 described above. Next, the glass fiber cloth 2 obtained above is placed on the resin composition, and it is left to stand for 1 minute so that the resin is impregnated in the gaps of the glass fiber cloth 2. Then, another PET film with a thickness of 0.05 mm as the peelable cover material 5 is placed thereon, and the weight of the hardened resin composition layer 3 is 40 g/m ^{2 by} pressing it with a roller. After that, for each of the aforementioned PET films, the resin composition was irradiated with light using a black fluorescent lamp (trade name FL15BLB manufactured by Toshiba Co., Ltd.) (light irradiation conditions: cumulative light quantity 200mJ/cm ² ) to harden the cured resin composition , The hardened resin composition layer 3 is formed. Next, two PET films with a thickness of 50 μm as the peelable cover material 5 were removed to obtain a transparent sheet. In the resulting transparent sheet, the cured resin composition layer 3 (the cured product of the resin composition) is impregnated into the gaps between the glass fibers of the glass fiber cloth 2, and a cured resin composition is formed on both sides of the glass fiber cloth 2物层3。 Object layer 3.

<Comparative Example 3> (Manufacture of glass fiber cloth 2) The warp and weft system used UNITAKA GLASS FIBER Co., Ltd. product name "ECD450 1/0 1.0Z" (average filament diameter 5μm, average filament number 200, The twist number is 1.0Z), woven with an air-jet shuttleless loom to obtain a plain weave glass fiber fabric with a warp yarn density of 60 yarns/25mm and a weft yarn density of 60 yarns/25mm. Next, heating was performed at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. Afterwards, the surface treatment agent silane coupling agent (S-350: N-vinylphenyl-aminoethyl-γ-aminopropyl trimethoxysilane (hydrochloride) Chisso Co., Ltd.) was adjusted to 15g/ After squeezing the concentration of L with a dip dyeing machine, dry and bake at 120°C for 1 minute. In addition, the glass fiber fabric was subjected to a widening treatment once with a water flow process at a pressure of 1.5 MPa so that the tension of the glass fiber fabric was 100 N/m in the warp direction to obtain a glass fiber fabric. The resulting glass fiber fabric has a warp yarn density of 60 yarns/25mm, a weft yarn density of 60 yarns/25mm, a thickness of 50 μm, a mass of 53 g/m ² and a refractive index of 1.561.

(Cover material 5 that can be peeled on a thermoplastic resin laminated layer) Laminate the polypropylene film as the peelable cover material 5 that can be peeled off during use with an acrylic adhesive on one side, and dry it on the aforementioned side to provide resistance The electrostatic layer 6 is the thermoplastic resin layer 4 on the antistatic layer 6 of COMOSHINE (registered trademark) A4300, so that the adhesive is located on the side of the antistatic layer 6 to obtain a peelable cover material 5/acrylic acid 6 that can be peeled off during use Ester-based adhesive/antistatic layer 6/Laminated body A of COMOSHINE (registered trademark) A4300 as the thermoplastic resin layer 4. Prepare two laminates A.

(Production of transparent sheet) Cosmoshine (registered trademark) A4300 surface side (that is, the side opposite to the peelable cover material 5 that can be peeled off during use) of the laminated body A obtained above is coated as a hardened resin composition The cured resin composition described in Table 1 of layer 3. Next, the obtained glass fiber cloth 2 is placed on the cured resin composition as the cured resin composition layer 3, and it is left to stand for 1 minute so that the cured resin composition is impregnated in the gaps of the glass fiber cloth 2. Then, another laminate A obtained above is placed on the hardened resin composition layer with the COMOSHINE (registered trademark) A4300 surface side of the laminate A (ie, the side opposite to the peelable cover material 5 peeled off during use). It is placed on three sides, and the layered body A is pressurized with a roll so that the mass of the cured resin composition layer 3 becomes 160 g/m ² . After that, in the state of the peelable cover material 5 that has been peeled off during the laminated use, the cured resin composition as the cured resin composition layer 3 is irradiated with light using a black fluorescent lamp (trade name FL15BLB, manufactured by Toshiba Co., Ltd.) (Light irradiation conditions: cumulative light quantity 200mJ/cm ² ), the hardened resin composition is hardened to form a hardened resin composition layer 3, and the laminated structure shown in Figure 3 is obtained (the peelable cover material 5 that can be peeled off during use) /Acrylic adhesive that can be peeled off with the cover material 5/Antistatic layer 6/Thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300)/Composition of hardened resin contained in the state of impregnating glass fiber cloth 2 Transparent sheet of material layer 3 / thermoplastic resin layer 4 (COSMOSHINE (registered trademark) A4300) / antistatic layer 6 / acrylate adhesive that can be peeled off with the cover material 5 / peelable cover material that can be peeled off during use 5) material. In the resulting transparent sheet, the cured resin composition layer 3 (the cured product of the resin composition) is impregnated in the gaps between the glass fibers of the glass fiber cloth, and the cured resin composition layer 3 is formed on both sides of the glass fiber cloth layer. .

Furthermore, in the examples and comparative examples, the weave density of the glass fiber fabric is measured and calculated according to JIS R 3420 2013 7.9. In addition, the thickness of the glass fiber fabric is measured and calculated by the JIS R 3420 2013 7.10.1A method. The quality of glass fiber fabric is measured and calculated by JIS R 3420 2013 7.2. The refractive index of the cured resin composition and the glass fiber fabric was measured and calculated by the aforementioned method. The Abbe number of the cured resin composition and the glass fiber fabric was measured and calculated by the aforementioned method. The following evaluation was performed after the transparent sheet was manufactured and left in a room for 1 week.

(Total light transmittance and haze before and after use in a high temperature and humidity environment) The total light transmittance and haze of the transparent sheet before use in a high temperature and humidity environment are based on JIS K7375 2008 "Determined Plastic-Full Method of light transmittance and total light reflectance" measurement. The total light transmittance and haze after use in a high temperature and humidity environment is the transparent sheet used as a transparent sheet to promote the test, and the transparent sheet is heated for 7 days in a humid and hot environment at 50°C and 90% humidity in a constant temperature and humidity machine. The material is measured by JIS K7375 2008 "Plastics-Method for obtaining total light transmittance and total light reflectance". The total light transmittance before and after use in a high temperature and humidity environment is more than 90%, and the haze before and after being placed in a high temperature and humidity environment is less than 3%. In addition, in Examples 1 to 4 and Comparative Example 3, the transparent sheet after peeling off the peelable cover material was evaluated.

(Initial tear strength (N)) Measured and calculated by the method described above. Those above 50N are qualified. In addition, in Examples 1 to 4 and Comparative Example 3, the transparent sheet after peeling off the peelable cover material was evaluated.

(Evaluation of incombustibility) The surface of each transparent sheet was irradiated with radiant heat of 50kw/m ² with a radiant electric heater, and the total calorific value 20 minutes after the start of heating was measured, and the time ^{when the calorific value exceeded 200kw/m 2 20 minutes after the start of heating.} The total calorific heating start after 20 minutes of 8MJ / m ² or less, and 20 minutes after the start of heating, the maximum heat release rate for at least 10 seconds 200kw / m ² of the case does not exceed evaluated as excellent in incombustibility (◎). In addition, in Examples 1 to 4 and Comparative Example 3, the transparent sheet after peeling off the peelable cover material was evaluated.

(Evaluation of weaving defects of glass fiber cloth after the resin contained in the transparent sheet is burned) The transparent sheet is put into a furnace at a temperature of 625°C for 60 minutes and then taken out, cooled to room temperature, and the glass fiber cloth is visually observed The state was evaluated using the following criteria. ○Above is qualified. In addition, in Examples 1 to 4 and Comparative Example 3, the transparent sheet after peeling off the peelable cover material was evaluated. ⊚: There is no through hole with a side of 0.5 mm or more in the texture, and weaving defects are hardly confirmed. ○: There is no through hole with a side of 0.5 mm or more in the texture. Although there are some obvious weaving defects, it is a level that is not a problem in practical use. ×: A through hole with a side of 0.5 mm or more is confirmed in the texture, and the knitting flaw is obvious, which is a level that will cause practical problems.

(Surface resistivity of transparent sheet (Ω)) Use the transparent sheet just after the manufacture is completed, and after placing it for 15 minutes in an environment with a temperature of 23°C and a relative humidity of 50%RH using the aforementioned method, according to JIS K 6911 1995 5.13.2 The electrical resistivity was measured using a high-resistance meter 4339B manufactured by Agilent Technologies Co., Ltd. with an external voltage of 100 V for 1 minute. In addition, in Examples 1 to 4 and Comparative Example 3, the transparent sheet after peeling off the peelable cover material was evaluated.

Table 1 shows the results of each evaluation.

[Table 1]

Because the transparent sheets of Examples 1 to 4 include: a glass fiber cloth with a thickness of 8 to 30 μm, a hardened resin composition layer contained in the glass fiber cloth in a state in which it is impregnated, and the hardened resin composition layer laminated on the aforementioned hardened resin composition layer. And it contains one or more thermoplastic resin layers selected from the group consisting of polyester resin, polycarbonate resin and polyamide resin, so it can increase the initial tear strength and improve and maintain the high temperature and humidity environment. Transparency before and after use. Among them, the glass fiber cloth fabric of the sheets of Examples 1 and 2 has an average filament diameter of 3.5 to 4.5 μm and a number of filaments of 20 to 55 for the glass yarn constituting the aforementioned fabric, and the weaving density of the aforementioned fabric regardless of warp and weft They are all 80~120 pieces/25mm, thickness 9~13μm, and mass 9~15g/m ² , so it is easier to prevent the glass fiber cloth from woven defects after the resin contained in the transparent sheet burns. In addition, in Examples 1, 3, and 4, since the curable resin composition layer is formed by curing a resin composition containing an acrylic syrup, the transparency before and after use in a high-temperature and high-humidity environment is more excellent. Among them, in Example 1, because the glass fiber cloth has a thickness of 13 μm or less, the transparency before and after use in a high-temperature and high-humidity environment is remarkably excellent.

In addition, the transparent sheets of Examples 1 to 4 have excellent alkali cleaning agent resistance when the peelable cover material has been peeled off, can perform high-frequency welding processing, and can further suppress the generation of static electricity as the cover material is peeled off. In addition, since the transparent sheets of Examples 1 to 4 include covering materials, especially light-transmitting covering materials, it is possible to suppress damage during the manufacturing process of the transparent sheet and the process of installing the smoke prevention wall. The sex is also excellent. Furthermore, the transparent sheets of Examples 1 to 4, especially the transparent sheets of Examples 1 to 3, are also excellent in flexibility, and can be made into roll-shaped products of 5 to 300 m.

On the other hand, the transparent sheet of Comparative Example 1 has a vinyl chloride resin film laminated on a hardened resin composition, so the plasticizer in the vinyl chloride resin transfers (overflow) after being used in a high temperature and humidity environment, and oozes out to chlorine. The interface between the vinyl resin film and the cured resin composition layer failed to maintain transparency.

The transparent sheet of Comparative Example 2 does not contain a thermoplastic resin layer, so the initial tear strength is poor. The thermoplastic resin is laminated on the hardened resin composition layer and contains selected from polyester resins, polycarbonate resins, and polyamides. One or more of the group consisting of amine resin.

Since the thickness of the glass fiber cloth of the transparent sheet of Comparative Example 3 exceeds 30 μm, the transparency before and after use in a high-temperature and high-humidity environment is poor.

1‧‧‧Transparent sheet 2‧‧‧Glass fiber cloth 3‧‧‧Hardened resin composition layer 4‧‧‧Thermoplastic resin layer 5‧‧‧Releasable covering material 6‧‧‧Antistatic layer 31,32‧ ‧‧Surface 41,42 of the hardened resin composition layer ‧‧‧Surface side part of the thermoplastic resin layer 4

Fig. 1 is a schematic cross-sectional view showing an example of the transparent sheet of the present invention. Fig. 2 is a schematic cross-sectional view showing an example of the transparent sheet of the present invention. Fig. 3 is a schematic cross-sectional view showing an example of the transparent sheet of the present invention. Fig. 4 is a schematic plan view illustrating the method of measuring the initial tear strength of the present invention.

1‧‧‧Transparent sheet

2‧‧‧Glass fiber cloth

3‧‧‧Hardened resin composition layer

4‧‧‧Thermoplastic resin layer

31,32‧‧‧Surface of hardened resin composition layer

Claims (9)

A transparent sheet for anti-smoke hanging walls, comprising: glass fiber cloth with a thickness of 8-30 μm; a hardened resin composition layer, which is contained in the glass fiber cloth in a state impregnated into the glass fiber cloth; thermoplastic resin A layer which is laminated on the aforementioned hardened resin composition layer and contains a thermoplastic resin other than polyvinyl chloride resin, and the thermoplastic resin layer does not peel off when used as a smoke prevention wall; and a peelable light-transmitting covering material, which is laminated On the aforementioned thermoplastic resin layer, and when used as an anti-smoke hanging wall, the covering material is peeled off; the mass of the aforementioned hardened resin composition layer is 20-100 g/m ² ; and the transparent sheet for anti-smoke hanging wall is as follows The total light transmittance before and after the promotion test is above 90% and the haze is below 3%; (promotion test method): the transparent sheet after peeling off the aforementioned covering material is placed in a constant temperature and humidity machine at 50°C and a humidity of 90 Heat for 7 days in a humid and hot environment, then dry and cool naturally. A transparent sheet for anti-smoke hanging walls, comprising: glass fiber cloth with a thickness of 8-30 μm; a hardened resin composition layer, which is contained in the glass fiber cloth in a state impregnated into the glass fiber cloth; thermoplastic resin A layer which is laminated on the aforementioned hardened resin composition layer and contains a thermoplastic resin other than polyvinyl chloride resin, and the thermoplastic resin layer does not peel off when used as a smoke prevention wall; and a peelable light-transmitting covering material, which is laminated On the aforementioned thermoplastic resin layer, and when used as a smoke prevention wall, the covering material is peeled off; the aforementioned glass fiber cloth fabric, the average filament diameter of the glass yarn constituting the aforementioned fabric is 3.5~4.5μm, and the number of filaments is 20~ 110 pieces, and the weaving density of the aforementioned fabric is 80~120 pieces/25mm regardless of warp and weft, thickness 9~30μm, and mass 9~35g/m ^2; The total light transmittance is more than 90% and the haze is less than 3%; (promoted test method): load the transparent sheet after peeling off the aforementioned covering material into a constant temperature and humidity machine, and place it in a humid and hot environment at 50°C and 90% humidity Heat for 7 days, dry and cool naturally. According to claim 1 or 2, the transparent sheet for smoke prevention hanging wall, wherein the glass fiber cloth impregnated with the hardened resin composition layer is one piece. The vertical wall smoke requested item 1 or 2 with the transparent sheet, wherein the total mass of the coating material after release of the transparent sheet material (g / m ^2), the mass of glass fiber cloth (g / m ² The ratio of) is 3-15% by mass. The vertical wall smoke requested item 1 or 2 with the transparent sheet, wherein the total mass of the coating material after release of the transparent sheet material (g / m ^2), the mass of glass fiber cloth (g / m ² The ratio of) is 3-12% by mass. Such as claim 1 or 2 of the transparent sheet for anti-smoke hanging wall, which The above-mentioned cured resin composition layer is formed by curing a resin composition containing acrylic slurry. According to claim 1 or 2, the transparent sheet for smoke prevention hanging wall, wherein the total mass of the hardened resin composition layer and the thermoplastic resin layer in the transparent sheet is 150 to 300 g/m ² . The transparent sheet for smoke prevention wall of claim 1 or 2, wherein the thermoplastic resin layer contains an antistatic agent at least on the surface side. An anti-smoke hanging wall comprises the transparent sheet for an anti-smoke hanging wall according to any one of claims 1 to 8.

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