JP2911201B2 - Display panel suitable for emergency exits, etc., and display device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a display panel and a display device using the same, and more specifically, to an emergency exit for displaying an emergency exit of a building, an underground shopping mall, an evacuation route, and the like. The present invention relates to a suitable display panel and a display device using the same.

[Conventional technology]

Buildings are usually provided with emergency exits to evacuate in the event of an emergency such as a fire or earthquake. In addition, a display for indicating the location of the emergency exit is provided at a key point of the passage on each floor of the building by a display device, so that people in the building can be evacuated to the emergency exit smoothly and exit the building in an emergency.

Thus, the display device is configured such that the display contents can be visually recognized by illuminating each display plate with an internal illuminating lamp. In general, as the display panel, a display panel in which display contents are colored and printed with a green ink or the like on a milky white acrylic plate or a milky white vinyl chloride plate having a thickness of about 2 mm is widely used.

[Problems to be solved by the invention]

However, as described above, conventional display panels used for emergency exits and the like are generally made of acrylic plates or vinyl chloride plates. It ’s harder to do it,
There is a problem in that the location of an emergency exit or the like cannot be known, and people in the building or underground mall cannot be smoothly guided to the outside of the building or the ground in an emergency.

Further, conventionally, there has been an attempt to use a glass plate as the above-mentioned display plate in order to solve the above-mentioned problems of the acrylic plate or the vinyl chloride plate. There has been a problem that the plate is broken and scattered due to a rapid temperature change, and its display function is impaired.

Although a method of coating a glass sheet with a plastic sheet was also considered, such a coated glass sheet has a display function at room temperature, but the display function deteriorates with time, and the display function is reduced by heat. Damage, moreover, weight,
There was a problem that both costs increased.

Therefore, an object of the present invention is to prevent the display contents from being discolored or damaged even when the temperature in the building rises in an emergency such as a fire, and to prevent the display contents from being temporally changed due to ultraviolet rays of an illumination lamp or the like. A display panel suitable for emergency exits (hereinafter referred to as "emergency exit display panel" as necessary), which can maintain the initial display function stably and reliably without discoloration, etc. To provide a display device.

[Means for Solving the Problems] The present invention provides a glass plate, a heat-resistant plastic sheet joined to the glass plate, and a heat-resistant plastic sheet and / or a glass plate formed on at least one of the front and back surfaces of the glass plate. The above object has been achieved by providing a display panel suitable for emergency exits and the like, characterized by having a display layer for displaying predetermined contents.

Further, the present invention is suitable for an emergency exit or the like, which includes the emergency exit display panel and a light source for irradiating the emergency exit display panel as a suitable device using the emergency exit display panel. A display device is also provided.

Hereinafter, the emergency exit display panel of the present invention will be described, for example, in the first
This will be described in detail with reference to the drawings.

The emergency exit display panel of the present invention includes, for example, a glass plate 1,
A heat-resistant plastic sheet 2 bonded to the glass plate 1 by heat fusion or an adhesive, and a display layer for displaying predetermined contents formed on at least one of the heat-resistant plastic sheet 2 and the glass plate 1 And 3.

The glass plate 1 is not limited to a specific glass as long as it is formed of generally used glass. As such a glass, for example,
Material Encyclopedia (pp. 410-427, Edited by the Material Encyclopedia,
February 5, 1984, published by the Industrial Research Institute, Inc.) and the Encyclopedia of Products (pp. 783-796, edited by Nishizo Uesaka, June 15, 1979,
And the glass described in Toyo Keizai Shinposha).
The glass preferably has a softening temperature of 300 ° C. or higher, more preferably 400 ° C. or higher, even more preferably 500 ° C. or higher. Examples of the glass exhibiting such a softening temperature include, for example, soda ash glass, borosilicate glass, barium borosilicate glass, quartz glass, and lead glass. It is preferable because it is easy.

Further, the glass may be either colorless and transparent or translucent, but is preferably translucent in order to hide the shape of an illumination lamp of a display device described later. As translucent glass,
For example, milky white glass in which an emulsifier such as phosphate, fluorite, cryolite or the like is appropriately mixed as an auxiliary material can be used. Also,
The surface of the glass plate 1 may be a smooth surface or a surface having minute irregularities, and is preferably a surface having irregularities in order to suppress unevenness of the illumination lamp.

Further, the thickness of the glass plate 1 is not limited to a specific thickness, but is usually preferably 0.5 to 10 mm,
0.7 to 7 mm is more preferable, and 1 to 5 m is still more preferable.

The heat-resistant plastic sheet 2 is not limited to a specific thermoplastic resin as long as it is formed of a thermoplastic resin that is stable in a high-temperature atmosphere such as in a fire. Such a thermoplastic resin has a temperature
It is preferable to use a resin having heat resistance that does not cause significant discoloration and melting for 0 minutes.Examples of such a thermoplastic resin include a fluorine-based resin, a polyester-based resin, a polyether-based resin, a polyamide-based resin, a polyimide-based resin, and a silicone-based resin. Resins.

 The thermoplastic resin will be further described.

Examples of the fluororesin include ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene copolymer (ECTFE), hexafluoropropylene-tetrafluoroethylene copolymer (FEP), purple Oroalkyl vinyl ether-tetrafluoroethylene copolymer (PFA), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer, polychloro Trifluoroethylene (PCTFE) and the like.

Examples of the polyester-based resin include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycarbonate (PC), polyarylate (U-polymer), econol, and the like.

Examples of the polyether-based resin include polyacetal (POM) and polyphenylene ether (PPE, PPE).
PO), polyether-ether ketone (PEEK), polyphenylene sulfide (PPS), polyetherimide (Ultem) and the like.

Examples of the polyamide resin include nylon 6 (PA6), nylon 6-6 (PA66), nylon 6
-10 (PA610), nylon 6-12 (PA612), nylon 11
(PA11), nylon 12 (PA12), nylon MXD6 (Lenny) and the like.

In addition, among the above thermoplastic resins, when used as the heat-resistant plastic sheet 2, heat,
Fluorine-based resins having stability to light and flame retardancy are preferred, and among the fluorine-based resins, the above-mentioned ETFE, FEP
And PFA are more preferable, and the ETFE is more preferable.

The ETFE can be produced, for example, by the method described in JP-B-59-50163, or a commercially available product can be used. As commercially available products, for example, Aflon COP (manufactured by Asahi Glass Co., Ltd.), NEOFLON ETFE (manufactured by Daikin Industries, Ltd.), and Texel (manufactured by DuPont) are preferable.

As the FEP, a commercially available product can be used. As the commercially available product, for example, Neoflon FEP (manufactured by Daikin Industries, Ltd.) and Teflon FEP (manufactured by DuPont) are preferable, and PFA is also a commercially available product. As commercially available products, for example, Neoflon PFA (manufactured by Daikin Industries, Ltd.) and Teflon PFA (manufactured by DuPont) are preferable.

The display layer 3 is formed on at least one of the heat-resistant plastic sheet 2 and the glass plate 1 so that the display content can be visually recognized. Therefore, the display layer 3 is
As shown in FIG. 1, even if formed on the surface of the heat-resistant plastic sheet 2 bonded to the glass plate 1, it is formed directly on the glass plate 1 as shown in FIG. Or a member formed between the glass plate 1 and the heat-resistant plastic sheet 2.

The method of forming the display layer 3 is not particularly limited. For example, a hand-cutting method, a method of attaching a marking film cut out by a cutting machine,
Thermal transfer method, jet spray method, gravure printing method, screen printing method, flexographic printing method, letterpress printing method, intaglio printing method, lithographic printing method, etc., among others, the screen printing method is preferred in terms of productivity, finished state, etc. preferable.

When the display layer 3 is printed using a screen printing method, an ink containing a pigment such as an inorganic pigment or an organic pigment can be used as a colorant for the ink. For example, as a green pigment often used as an emergency exit display panel, in organic pigments, medium chlorinated copper phthalocyanine pigment,
Highly chlorinated copper phthalocyanine pigments, high chlorobrominated copper phthalocyanine pigments, biolanthrone green, and the like.Inorganic pigments include, for example, chromium oxide pigments, cobalt-titanium-nickel-zinc oxide. Pigments and cobalt-titanium pigments. The green pigment may be a mixture of an organic or inorganic blue pigment and a yellow pigment.

The pigment is bound by a resin binder, but the resin for such a resin binder is not particularly limited. Examples of such a resin include an acrylic resin and an epoxy resin. Fluorinated resin,
Silicone resins and the like can be mentioned.

The glass plate 1 and the heat-resistant plastic sheet 2
It is preferable that the adhesive used for bonding the adhesive maintain the adhesive holding force even at 200 ° C., more preferably 220 ° C. or higher, even more preferably 240 ° C. or higher. The adhesive having such a heat-resistant adhesive holding power is hardly melted even in a high-temperature atmosphere such as a fire, and can prevent the heat-resistant plastic sheet 2 from peeling off from the glass plate 1.
Examples of the resin for forming such an adhesive include an acrylic resin, a fluorine resin, a natural or synthetic rubber resin, a urethane resin, a silicone resin, and the like.
Among them, acrylic resins, fluorine resins, and silicone resins are preferred.

The thickness of the adhesive layer 4 formed by the adhesive is:
Although not particularly limited, generally 5 to 500μ
Is preferably, 10 to 300 µm is more preferable, and 20 to 200 µm is further preferable. The adhesive layer 4 may be a transparent layer or a translucent layer containing white fine particles, and is preferably a translucent layer.

In addition, the adhesive has improved light resistance, heat resistance, and adhesive strength by blending various additives such as an ultraviolet absorber, a light stabilizer, an antioxidant, a crosslinking agent, a tackifier, and a plasticizer. Are preferred.

The translucent layer formed by the glass plate 1 and / or the heat-resistant plastic sheet 2 has a haze value according to JIS K-6714 of 70% or more and scatters light so that the shape of the illumination lamp can be recognized from the outside. It is sufficient if the display layer 3 can be uniformly illuminated. When a layer other than the glass sheet 1 and the heat-resistant plastic sheet 2 is a translucent layer, an additive may be added to the layer. Examples of such an additive include zinc white, zinc sulfide, Titanium dioxide, calcium carbonate, clay, barium sulfate, alumina white, silica, muscovite, talc,
Glass and dimethylpolysiloxane are exemplified. In addition, the interface of the translucent layer may be a smooth surface or a surface having minute irregularities. To form minute irregularities, an embossing method, a blasting method, an etching method,
Irregular or regular irregularities may be formed by a method such as screen printing.

The thickness of the translucent layer is not particularly limited,
The thickness may be such that the haze value is 70% or more, and is generally 1 μm to 10 mm, preferably 3 μm to 7 mm, and more preferably 5 μm to 5 mm. In general, a translucent layer can be formed by allowing any one layer located between the display layer 3 of the emergency exit display panel and the illumination lamp to contain fine particles having a refractive index different from that of the layer itself. .

The glass plate 1 and the heat-resistant plastic sheet preferably contain a predetermined amount of a conventionally known ultraviolet absorber in at least one of them. By including the ultraviolet absorber in this manner, as described later, ultraviolet rays can be cut in advance from the light absorbed by the display layer 3 and the display layer 3 can be prevented from being deteriorated by the ultraviolet rays. Further, a layer containing an ultraviolet absorber may be separately provided on the display panel.

 Next, the display device of the present invention will be described.

A display device according to the present invention includes the display plate according to the present invention and a light source that irradiates the display plate.

Examples of the light source include illumination lamps such as a fluorescent lamp, a tungsten bulb, a halogen lamp, and a light emitting diode (LED). Among them, a fluorescent lamp is preferable in terms of life, efficiency, color tone, economy, and the like.

It is preferable that the display plate has a layer that absorbs ultraviolet light positioned closer to the light source than the display layer.
By locating the layer that absorbs ultraviolet light closer to the light source than the display layer in this way, the ultraviolet light from the light source cuts off the ultraviolet light by the layer that absorbs ultraviolet light before reaching the display layer. It is possible to suppress or prevent the layer from being deteriorated by ultraviolet rays, and to maintain the display content of the display layer in a clear state for a long period of time.

[Action]

According to the display device using the emergency exit display of the present invention, even in the event of a fire or the like, the temperature of the building or the underground shopping mall rises, and even if the building or the underground shopping mall becomes hot, it does not discolor or break.
The location of the emergency exit and the evacuation route can be displayed stably and reliably while maintaining the display function.

〔Example〕

Hereinafter, the present invention will be described based on the following embodiments shown in FIGS. 1 to 12. It goes without saying that the present invention is not limited to the following examples. L in each figure is an illumination lamp.

Example 1 First, having an adhesive layer 2A and a release paper layer (not shown)
After the pattern shown in FIG. 10 was screen-printed on a sheet 2 consisting of the following film sheet I of 50 μm thick milky white ETFE using the following green ink I, the display layer 3 was formed. Dried for 60 minutes.

Next, the release paper layer (not shown) of the sheet 2 was peeled off, and the sheet 2 was attached to a glass plate 1 made of the following glass I having a thickness of 2 mm with the display layer 3 facing the front side, as shown in FIG. An emergency exit display panel (Product 1 of the present invention) was produced. Incidentally, the thickness of the display layer 3 was 10 μm.

Example 2 First, a display layer 3 was formed by screen-printing a pattern shown in FIG. 10 using a green ink I on a milky glass plate 1 made of the following glass II having a thickness of 2 mm and made of white. 3 was dried at 80 ° C. for 60 minutes.

Next, an adhesive is applied to the entire surface of the glass plate 1 from above the display layer 3.
A sheet 2 'made of the following film sheet II of transparent ETFE having 2A was attached to prepare an emergency exit display panel (product 2 of the present invention) shown in FIG.

Example 3 After the pattern shown in FIG. 11 was directly screen-printed on the surface of the glass plate 1 of the product 1 of the present invention obtained in Example 1 using the following white ink II to form a print layer 3 '. , Dried at 80 ° C for 60 minutes, and the emergency exit signboard shown in Fig. 3 (product 3 of the present invention)
Was prepared.

Example 4 First, a sheet having a pressure-sensitive adhesive layer 2'A and a release paper layer 2'B was prepared.
The screen shown in FIG. 12 is screen-printed with a white ink III on a sheet 2 'made of the following film sheet II of transparent ETFE having a thickness of μ to form a printing layer 3', and then the white printing layer 3 ' Was dried at 80 ° C. for 60 minutes.

Next, the release paper of the sheet 2 ′ was peeled off, and the white ink layer 4 was attached to the surface of the glass plate 1 of the product 1 of the present invention obtained in Example 1 with the white ink layer 4 on the front side, and an emergency exit display shown in FIG. A plate (Product 4 of the present invention) was produced.

Example 5 A glass plate 1 made of the following glass I having a thickness of 2 mm was heated to 350 ° C., and a sheet 2 made of the following film sheet III of 100 μm thick milky ETFE was heat-welded to the glass plate 1 and allowed to cool. Then, the pattern shown in FIG. 10 was directly screen-printed on the surface of the glass plate 1 using the green ink IV to form the display layer 3 and then placed in an oven at 120 ° C. for 30 minutes to obtain a fifth layer.
An emergency exit display panel (Product 5 of the present invention) shown in the figure was produced.

Example 6 After forming a display layer 3 on a sheet 2 consisting of the following film sheet IV of 100 μm thick transparent ETFE using the following ink I of green color, the pattern shown in FIG. The display layer 3 was dried at 80 ° C. for 30 minutes.

Next, the following ink IV of white color was printed on both sides of the display layer 3 of the green ink I, and further placed in an oven at 80 ° C. for 60 hours.
The white ink layer 5 is formed as an adhesive layer on the glass plate 1 made of glass I by adding the white ink layer 5 for 180 minutes.
Laminating was performed at ℃ to produce an emergency exit display panel (product 6 of the present invention) shown in FIG.

Example 7 The display layer 3 was formed by printing the pattern shown in FIG.
The display layer 3 was dried at 80 ° C. for 30 minutes.

Next, the sheet 2 used in Example 1 was adhered to the entire surface of the glass plate 1 from above the display layer 3 to produce an emergency exit display plate (product 7 of the present invention) shown in FIG.

Example 8 The following film sheet II of a transparent ETFE having an adhesive layer 2 'on the surface of the glass plate 1 of the product 7 of the present invention obtained in Example 7
The emergency exit display panel (Product 8 of the present invention) shown in FIG.

Example 9 Milky white glass plate 1 of 2 mm thick milky white glass II
A sheet 2 made of the following film II of transparent ETFE having an adhesive layer 2'A on both sides thereof is adhered, and the pattern shown in FIG. After this, the display layer 3 was dried at 80 ° C. for 60 minutes to produce an emergency exit display panel (product 9 of the present invention) shown in FIG.

Example 10 An emergency exit display panel (product 10 of the present invention) shown in FIG. 7 was produced in the same manner as in Example 7 except that the sheet 2 made of the following film sheet V was used instead of the sheet 2 in Example 7. .

Comparative Example 1 A pattern shown in FIG. 10 was printed on a milky white acrylic plate having a thickness of 2 mm using the following green ink I to form a display layer, and then dried at 60 ° C. for 2 hours, followed by a display panel for an emergency exit ( Comparative product 1)
Was prepared.

Comparative Example 2 First, a pattern shown in FIG. 10 was screen-printed on a glass plate 1 made of milky white glass II having a thickness of 2 mm using the following green ink I to form a display layer 3 and then heated at 80 ° C. Dried for 60 minutes. Then, a transparent PVC film having a pressure-sensitive adhesive layer 2A (thickness of the PVC film: 50 μm) is adhered to the entire surface of the glass plate 1 from above the display layer 3 and an emergency exit display plate corresponding to Example 2 (Comparative product 2) Was prepared.

Comparative Example 3 First, a transparent PVC film having a pressure-sensitive adhesive layer (50 μm in thickness of a PVC film) having a pressure-sensitive adhesive layer on both surfaces of a glass plate made of the following milk II having a thickness of 2 mm and having a thickness of 2 mm was used. Using I, the pattern shown in FIG. 10 was screen-printed to form a display layer, and this display layer was dried at 80 ° C. for 60 minutes to produce an emergency exit display panel corresponding to Example 9 (Comparative product 3). did.

Comparative Example 4 A display layer was formed by screen-printing the pattern shown in FIG. 10 on a glass plate made of milky white glass II having a thickness of 2 mm using the following green ink I using an ink I shown below. After drying for a minute, an emergency exit display panel (Comparative product 4) was prepared.

Film Sheet I First, ETFE resin (Aflon COP: manufactured by Asahi Glass Co., Ltd.) 100
Pellets made by dispersing 3 parts by weight of zinc sulfide (Sactris: BASF) with respect to parts by weight were extruded with a 300 ° C. T-die to produce a 50 μm thick milky film.

Then, 100 parts by weight of an acrylic adhesive (Nissetsu PE-121: manufactured by Nippon Carbide Industry Co., Ltd.), 1.5 parts by weight of an ultraviolet absorber (Seesoap 704: manufactured by Shiraishi Calcium Co., Ltd.), and a light stabilizer (Tinuvin 622LD: 1 part by weight of Ciba-Geigy) and 25 parts by weight of toluene were added to dissolve the acrylic adhesive, and then 1.5 parts by weight of a crosslinking agent (Coronate: Nippon Polyurethane Co., Ltd.) was added and stirred. (OKC-110PSG: manufactured by Oji Chemical Co., Ltd.) and dried at 100 ° C. for 5 minutes to form an adhesive layer 2A having a thickness of 40 μm.

Further, both sides of the above milky film are subjected to a corona treatment so that "wetting" by a method in accordance with JIS K-6768 falls within a range of 45 to 54, and an adhesive layer is stuck on one side to prepare a film sheet 1. did.

Film Sheet II First, ETFE resin (Aflon COP: manufactured by Asahi Glass Co., Ltd.)
After a transparent film having a thickness of 50 μm was extruded with a T-die at 0 ° C., a corona treatment was performed in the same manner as in the above-mentioned film sheet 1, and then a pressure-sensitive adhesive layer was laminated on the treated surface to form a film sheet 2. Was prepared.

Film Sheet III First, ETFE resin (Aflon COP: manufactured by Asahi Glass Co., Ltd.) 100
Pellets obtained by kneading 5 parts by weight of titanium oxide with respect to parts by weight
After mixing 20 parts by weight and ETFE resin pellets 80 parts by weight,
It was extruded with a 300 ° C. T-die to prepare a 100 μm thick milky film sheet 3.

Film Sheet IV First, ETFE resin (Aflon COP: manufactured by Asahi Glass Co., Ltd.)
It was extruded with a T die at 0 ° C. to produce a transparent film having a thickness of 100 μm. Next, "wet" on both sides of this film 45-54
Corona treatment is performed so that it falls within the range of
Was prepared.

Film sheet V First, ETFE resin (Aflon COP: manufactured by Asahi Glass Co., Ltd.) 100
UV absorber (Mark LA-31, ADEKA
A pellet made by dispersing 0.5 part by weight of Argus Chemical Co., Ltd.) was extruded with a T-die at 300 ° C. to obtain a 50 μm thick transparent film. Then "wet" on both sides of this film
And a cross-linking agent (Coronate L: manufactured by Nippon Polyurethane Co., Ltd.) in 100 parts by weight of an acrylic pressure-sensitive adhesive (Nissetsu PE-121: manufactured by Nippon Carbide Industry Co., Ltd.) ) 1.5 parts by weight, 4 on release paper
The pressure-sensitive adhesive layer formed to a thickness of 0 μ was bonded to obtain a film sheet 5.

Ink I Fluorocopolymer solution (Lumiflon: Asahi Glass Co., Ltd.)
Phthalocyanine-based green pigment)
5 parts by weight (Heliogen Green K-8730: manufactured by BASF), 0.7 parts by weight of Seasorb 706 (manufactured by Shiraishi Calcium Co., Ltd.) and Tinuvin 234 (manufactured by Ciba Geigy) which are ultraviolet absorbers, and a light stabilizer (Tinuvin 622LD: 1 part by weight of Ciba Geigy), 0.02 parts by weight of an antifoaming agent (SC5540: manufactured by Toray Dow Corning Silicone Co., Ltd.) and 20 parts by weight of carbitol acetate were added, and the mixture was added to a colloid mill (Milmix MM-1: Kneading treatment at 10,000 rpm for 20 minutes using Nippon Seiki Seisakusho, and 8 parts by weight of a curing agent (Coronate HL: Nippon Polyurethane Co., Ltd.) is added and stirred sufficiently to produce green ink I. did.

Ink II 20 parts by weight of PS curing agent (manufactured by Teikoku Ink Manufacturing Co., Ltd.) and C-002 solvent (Teikoku Ink Manufacture (100 parts by weight) White ink 2 was prepared by adding 20 parts by weight of each of the above and stirring thoroughly.

Ink III 5 parts by weight of a phthalocyanine-based green pigment (Heliogen Green K8730: BASF) in the ink was replaced with titanium dioxide (CR).
-90: Ishihara Sangyo Co., Ltd.) Ink 1 except for 20 parts by weight
A white ink 3 was prepared in the same manner as the green ink.

Ink lV 20 parts by weight of PS curing agent (manufactured by Teikoku Ink Manufacturing Co., Ltd.) and 100 parts by weight of C-002 solvent (Teikoku Ink Manufacturing Co., Ltd.) per 100 parts by weight of two-component reaction ink (Sericol PS791: manufactured by Teikoku Ink Manufacturing Co., Ltd.) 20 parts by weight) and sufficiently stirred.

Ink V A white ink was prepared in the same manner as Ink 3, except that 3 parts by weight of a hardening agent coronate EH was used instead of 8 parts by weight of a hardening agent coronate H added in the preparation of Ink 3.

Glass I A commercially available soda ash glass having a thickness of 2 mm was cut into a size of 135 mm × 375 mm to prepare a glass I.

Glass II A commercially available milky glass plate having a thickness of 2 mm was cut into a size of 135 mm × 375 mm to produce Glass II.

Evaluation of each of the above-mentioned invention products The following evaluations (a) to (c) were performed for the invention products 1 to 10 and the comparison products 1 to 4, and the results are shown in Table 1 below.

According to the results shown in Table 1 below, it was found that the products 1 to 10 of the present invention were superior to the comparative products 1 to 4 in each evaluation.

(A) Recognition evaluation of display contents after heating After the emergency exit display panel was heated at 200 ° C for 30 minutes, the appearance of the emergency exit display panel was visually inspected, and the heat resistance of the emergency exit display panel was evaluated according to the following criteria. went.

：: No noticeable change, and the display contents can be clearly recognized. △: Discoloration or deformation, but barely recognizable display contents ×: Discoloration or deformation, noticeable display contents cannot be recognized (b) Heating, cooling After peeling evaluation Emergency exit display board was heated at 200 ° C for 30 minutes and then allowed to cool,
Place this emergency exit sign board on a horizontal surface from a height of 1m.
After visually inspecting the state of the emergency exit display panel when a 5 g iron ball was dropped on the center of the emergency exit display panel, the emergency exit display panel was evaluated according to the following criteria.

：: The display panel was not broken, or even if it was broken, the integrity of the laminate was not impaired, the display panel was not scattered at all, and the display contents were not impaired at all. ×: The laminate was peeled or scattered. The integrity of the
(C) After the WOM test was performed for 1000 hours, the same test as above was performed and evaluated.

[Effect of the Invention] The display device using the emergency exit display panel of the present invention does not discolor or break the display contents even when the temperature in the building rises in an emergency such as a fire, and The display content does not change over time due to the ultraviolet light of the illumination lamp or the like, and the initial display function can be stably and reliably maintained.

[Brief description of the drawings]

FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, FIG. 9 are cross-sectional views of each embodiment of the emergency exit display panel of the present invention. 10, FIG. 10 is a plan view showing an example of a pattern forming a display layer, and FIGS. 11 and 12 show other patterns displayed in each embodiment of the emergency exit display panel of the present invention. It is a front view. 1; glass plate 2; heat-resistant plastic sheet 3; display layer, 4; adhesive layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G09F 13 / 04,19 / 22 C03C 17/32

Claims (10)

(57) [Claims] The heat-resistant plastic sheet is bonded to the glass plate, and the display layer is formed of at least one of the glass plate and the heat-resistant plastic sheet. A display panel suitable for an emergency exit or the like, wherein the display panel is formed on one of the front surface and the rear surface. 2. The display panel according to claim 1, wherein at least one of the glass plate and the heat-resistant plastic sheet is translucent. 3. The display panel according to claim 1, wherein said heat-resistant plastic sheet is a thermoplastic resin which does not discolor or melt at 200 ° C. or higher for 30 minutes. 4. The display panel according to claim 1, wherein the heat-resistant plastic sheet is made of a fluororesin. 5. The display panel suitable for an emergency exit or the like according to claim 1, wherein the heat-resistant plastic sheet is joined by an adhesive. 6. The display panel according to claim 4, wherein the adhesive has a softening temperature of 200 ° C. or higher. 7. An emergency exit according to claim 1, wherein at least one of said glass plate and said heat-resistant plastic sheet contains an ultraviolet absorber. Display board. 8. The display panel according to claim 1, wherein the display panel is provided with a layer containing an ultraviolet absorbent. 9. A display suitable for emergency exits, etc., comprising the display panel according to any one of claims 1 to 8 and a light source for irradiating the display panel. Board. 10. The display panel according to claim 9, wherein a layer absorbing ultraviolet light is located closer to the light source than the display layer.
Display board suitable for the described emergency exit.