JP2012088361A - Sign plate and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sign plate being installed at locations of relatively poor illumination such as plants, warehouses, and underground passages, retaining a phosphorescent sign function providing favorable visibility at night for a long period, having fire retardancy, and dispensing with special manufacturing facilities, thereby being inexpensively manufactured; and to provide a method for manufacturing the same.SOLUTION: This sign plate includes: a white reflection layer provided on one surface of a base plate; a phosphorescent layer having a phosphorescent agent in thermosetting resin provided on the white reflection layer side; a design provided on the surface side of the other side of the white reflection layer of the phosphorescent layer; and a transparent layer covering the phosphorescent layer surface including the design. A part of the thermosetting resin constituting the phosphorescent layer is interposed between the white reflection layer and the phosphorescent layer as an adhesive layer.

Description

  The present invention relates to a sign board used for signs for evacuation guidance, indoor and outdoor guidance, and more particularly to a sign board useful as a sign for a road spot without an outdoor light source and a method for manufacturing the same.

Conventionally, phosphorescent guidance signs have the following merits compared to conventional internally illuminated guidance signs and have come to be used actively.
1. Maintenance free. The internally illuminated guide sign requires lamp replacement (about 1-2 years for fluorescent lamps) and battery replacement (about 2-3 years).
2. No electrical wiring is required during installation.
3. It is an energy-saving product that matches a low-carbon society.

As this kind of phosphorescent-type inductive label, disclosed in Patent Documents 1 and 2, etc., after irradiation with 50 L × 20 minutes with a regular light source fluorescent lamp D65, 130 mcd / square meter or more after 20 minutes, and 40 mcd / square after 60 minutes. It was not possible to obtain a brightness of more than square meters.
Satisfying this brightness is estimated to be able to greatly expand the installation because it can be installed in places with relatively dark lighting such as factories, warehouses, underground passages, etc., but there is no product that can satisfy this brightness at present.

It is considered necessary to satisfy the following conditions as conditions for phosphorescent signs that can satisfy this kind of luminance.
1. Aluminium-based phosphorescent material with a large particle size (100 μm or more) and a phosphorescent material kneading amount of 1,000 g / square meter or more.
2. The phosphorescent layer should be made of a transparent resin as a base material and transmit light sufficiently (total light transmittance of 90% or more).
In addition, a luminous layer shall be thickness within 10 mm, and the content rate of a luminous material shall be 30-80WT%. (In the case of the present invention, if the specific gravity of the phosphorescent material is 3.6 and the specific gravity of the base material is 1.1, the specific gravity of the luminous layer is 1.50 to 1.90.)
3. The white reflective layer functions properly. When the white reflective layer does not function, the luminance is reduced by 20 to 30%.
4). Also, by increasing the adhesive strength between the layers, moisture does not permeate between the layers, and the phosphorescent sign function with good nighttime visibility for a long period of time should be maintained.
5. A sign board that exhibits a phosphorescent sign function with good nighttime visibility over a long period of time can be manufactured at low cost without the need for special manufacturing equipment.

  Furthermore, the phosphorescent guide sign used indoors must be compliant with JIS Z 9107 “Safety Sign Board” for indoor use, and is required to have a flame retardance of 26 or more in terms of oxygen index.

Japanese Patent No. 4130939 JP 2006-293168 A

  The present invention has been made in view of the circumstances as described above, and can be installed in a place where lighting is relatively dark such as a factory, a warehouse, an underground passage, etc., and a phosphorescent sign function having good nighttime visibility over a long period of time. It aims at providing the sign board which can be manufactured at low cost, and its manufacturing method, since it has a flame retardance and does not require special manufacturing equipment.

In order to achieve the above object, in the sign plate according to the present invention, the phosphorescent agent is present in the white reflective layer provided on one surface of the substrate and the thermosetting resin provided on the white reflective layer side. In a sign board comprising a phosphorescent layer, a design present on the surface of the phosphorescent layer opposite to the white reflective layer, and a transparent layer covering the phosphorescent layer surface including the design,
A part of the thermosetting resin constituting the luminous layer is interposed as an adhesive layer between the white reflective layer and the luminous layer.

In the manufacturing method of the sign board according to the present invention to achieve the above object, a step of placing a transparent layer with the design on the hot platen,
Placing a mold on the transparent layer;
Pouring a thermosetting resin material kneaded with a phosphorescent agent into the mold; and
After the phosphorescent agent settles and separates into a phosphorescent layer and an adhesive layer, a substrate having a white reflective layer formed on one surface is arranged such that the white reflective layer is disposed on the phosphorescent layer side. A step of placing on top;
Removing the mold after the thermosetting resin material is cured;
And a finishing step of cutting unnecessary portions after taking out the product from the hot platen.

The present invention has the following effects.
According to the sign board of the invention of claim 1, it can be installed in a place where the lighting is relatively dark such as a factory, a warehouse, an underground passage, etc., while maintaining a phosphorescent sign function with good nighttime visibility over a long period of time. It has flame resistance.
According to the sign plate of the invention described in claim 2, since the total light transmittance by the adhesive layer is high, it can be used even in a place where the illumination is relatively dark.

According to the sign plate of the invention described in claim 3, since the heat can be efficiently dispersed by the metal plate having good thermal conductivity, the flame retardancy can be enhanced.
According to the sign plate of the invention of claim 4, sufficient luminance can be exhibited even in a place where the illumination is relatively dark.

According to the sign plate of the invention of claim 5, the flame retardancy of the entire sign plate can be further increased, and water does not permeate between the light storage layer and the transparent layer. Can be stably maintained for a long time.
According to the sign plate of the invention of claim 6, since water does not permeate between the phosphorescent layer and the design, the function of the phosphorescent layer can be stably maintained for a long time.

According to the manufacturing method of the sign plate of the invention described in claim 7, since no special manufacturing equipment is required, it can be manufactured at low cost.
According to the manufacturing method of the sign plate of the invention described in claim 8, since the thickness of the adhesive layer can be easily controlled, the total light transmittance by the adhesive layer is high, and it can be used even in a place where the illumination is relatively dark. A sign board can be manufactured at low cost.

Sectional drawing of the sign board which concerns on this invention. Sectional drawing which shows the state which inject | poured material into the metal mold | die arrange | positioned on the transparent film arrange | positioned on a heating board. Sectional drawing which shows the state which the material of FIG. 2 isolate | separated into the luminous layer and the thermosetting resin layer which is an adhesive bond layer. Sectional drawing which shows the state by which the board | substrate which provided the white reflection layer was arrange | positioned on the adhesive bond layer. Sectional drawing of the state which removed the metal mold | die of FIG. Sectional drawing which removed the heat disc of FIG.

Hereinafter, the best mode for carrying out the present invention will be described.
First, the form of this invention is demonstrated based on FIG.
The marker plate according to the present invention includes a white reflective layer 2 provided on one surface 11 of the substrate 1, a phosphorescent layer 3 in which a phosphorescent agent is present in a thermosetting resin provided on the white reflective layer 2 side, The phosphor 4 is composed of a design 4 existing on the surface of the phosphorescent layer 3 opposite to the white reflective layer 2 and a transparent layer 5 covering the surface of the phosphorescent layer 3 including the design 4.

The substrate 1 is a metal plate having a good thermal conductivity, and is an aluminum plate, a stainless plate, a coated steel plate or the like having a thickness Y of 0.5 to 4.0 mm, preferably 1.0 to 3.0 mm.
The white reflective layer 2 is obtained by coating one surface of the substrate 1 with a white paint in which a polyester resin or the like is mixed with titanium oxide in an amount of 20 to 60 μm.

Further, a part of the thermosetting resin constituting the luminous layer 3 is interposed as an adhesive layer 6 between the white reflective layer 2 and the luminous layer 3.
As this thermosetting resin, a polyurethane resin, an epoxy resin, a polyester resin, an acrylic resin or the like can be used, and a polyurethane resin is preferable.
The urethane material used in the present embodiment is a cast urethane material, and a main material having a reactive group (—NCO) called a prepolymer and a curing agent (amine system) react to become polyurethane. . Among these, a transparent non-yellowing thermosetting urethane material is particularly preferable.

The adhesive layer 6 is a transparent non-yellowing thermosetting urethane material that hardly contains a phosphorescent agent, and has a thickness t of 0.1 to 1.0 mm, preferably 0.2 to 0.4 mm.
Thus, the total light transmittance in the adhesive layer 6 is high, and the adhesive layer 6 can be used even in a place where the illumination is relatively dark.

  The phosphorescent layer 3 can use strontium oxide, aluminum oxide, rare earth oxide or the like in the thermosetting resin material, but is preferably an aluminate-based phosphorescent agent having a particle size of 100 μm or more. 30 to 80% by weight, resulting in a kneaded form of 1,000 to 5,000 g / square meter, preferably 1,500 to 3,000 g / square meter, and a thickness X of 1 to 10 mm, preferably 1. It is adjusted to 5-3.0 mm.

And the specific gravity of the luminous layer 3 (phosphorescent agent + transparent non-yellowing thermosetting urethane material) is adjusted to 1.50 to 1.90, preferably 1.60 to 1.80.
The aluminate-based phosphorescent agent is an alkaline earth-aluminate phosphorescent phosphor or the like having a particle size of 100 to 1000 μm, preferably 90% or more of the particle size is in the range of 150 to 450 μm. It is preferable to do.

  As a result, it can be installed in a relatively dark place such as a factory, a warehouse, an underground passage, etc., and a phosphorescent sign function with good nighttime visibility can be maintained for a long time.

Moreover, the transparent layer 5 is a flame retardant film material, and an easy adhesion process such as a plasma process is performed on a surface in contact with the phosphorescent layer 3.
As a result, the adhesion between the phosphorescent layer 3 and the transparent layer 5 is improved, so that water does not enter between the phosphorescent layer 3 and the transparent layer 5, and the function of the phosphorescent layer 3 is stabilized for a long period of time. The design can be easily printed on the transparent layer 5.
Moreover, as a flame-retardant film material, film materials such as PET (polyethylene terephthalate), cellulose, and polycarbonate are appropriately selected and used, and PET (polyethylene terephthalate) is particularly preferable.

The thickness of the flame retardant film material is preferably 150 to 200 μm, and it is preferable to use a PET film material that does not contain an ultraviolet absorber to further increase the flame retardancy.
By this, the flame retardance of the whole sign board can be further enhanced.
Moreover, the surface which contacted the luminous layer 3 which gave the design 4 is given the binder process.
As a result, the adhesiveness between the phosphorescent layer 3 and the design 4 is improved, and water does not permeate between the phosphorescent layer 3 and the design 4, so that the function of the phosphorescent layer 3 can be stabilized for a long time. Can be maintained.

  By using a sign board having the above-described constituent elements, afterglow for 20 minutes after irradiating the regular light source fluorescent lamp D65 50Lx for 20 minutes, 130 mcd / square meter, and after 60 minutes, the persistence intensity of 40 mcd / square meter or more Can be expected.

Next, the manufacturing method of the present invention will be described with reference to FIGS.
As shown in FIG. 2, a design 4 is applied to one surface of a PET (polyethylene terephthalate) film subjected to an easy adhesion treatment on a heating plate 9 heated to 80 to 130 ° C., and this design 4 is applied to the surface. The transparent layer 5 is disposed with the facing up.
Next, a mold 7 is placed on the transparent layer 5.
And in this mold 7, 100 parts of transparent non-yellowing thermosetting urethane prepolymer, 10 parts of amine-based curing agent, 150 parts of luminous agent having a particle size of 150 to 450 μm, A thermosetting resin material 31 mixed with 0.02 part of the reaction accelerator is poured.

Next, as shown in FIG. 3, after pouring the thermosetting resin material 31, in 1 to 2 minutes, the phosphorescent agent settles, and the phosphorescent layer 3 composed of the phosphorescent agent and the transparent non-yellowing thermosetting urethane material And the adhesive layer 6 made of a transparent non-yellowing thermosetting urethane material containing almost no phosphorescent agent.
At this stage, a part of the adhesive layer 6 is removed, and the thickness t of the adhesive layer 6 is adjusted to 0.1 to 1.0 mm, preferably 0.2 to 0.4 mm.

  Next, as shown in FIG. 4, an aluminum substrate 1 having a white reflective layer 2 formed on one surface 11 is disposed on the adhesive layer 6 so that the white reflective layer 2 is disposed on the phosphorescent layer 3 side. To do.

  Next, as shown in FIG. 5, after 30 to 40 minutes have elapsed, the thermosetting resin material 31 that is a transparent non-yellowing thermosetting urethane material is cured, and then the mold 7 is removed.

  Next, as shown in FIG. 6, after removing the product from the hot platen 9, it is subjected to a heat treatment at 80 ° C. for 12 hours and then finished by cutting unnecessary portions as shown in FIG. Can be a product.

  The above-described invention can be used for a gaze guidance mark, a guide plate, a signboard, and the like.

DESCRIPTION OF SYMBOLS 1 Substrate 2 White reflective layer 3 Luminous storage layer 4 Design 5 Transparent layer 6 Adhesive layer 7 Mold 9 Hot plate 11 One surface

Claims (8)

A white reflective layer (2) provided on one surface (11) of the substrate (1), and a luminous layer (3) in which a luminous agent is present in the thermosetting resin provided on the white reflective layer (2) side; A transparent layer (5) covering the surface of the phosphorescent layer (3) including the design (4) present on the surface opposite to the white reflective layer (2) of the phosphorescent layer (3) and the design (4) )
A part of the thermosetting resin constituting the phosphorescent layer (3) is interposed as an adhesive layer (6) between the white reflective layer (2) and the phosphorescent layer (3). Sign board to do.   The adhesive layer (6) is almost free of the phosphorescent agent and has a thickness (t) of 0.1 to 1.0 mm, and the phosphorescent layer (3) is 30 to 80 weights of the phosphorescent agent. %, And the thickness (X) is 1 to 10 mm.   The said board | substrate (1) is a metal plate with favorable heat conductivity, Comprising: Thickness (Y) is 1.0-3.0 mm, The sign board of Claim 1 or 2 characterized by the above-mentioned.   The phosphorescent layer (3) is an aluminate phosphorescent agent and has a particle size of 100 µm or more and is kneaded at 1000 to 5,000 g / square meter. The sign board according to claim 1.   The said transparent layer (5) is a flame-retardant film material, Comprising: The surface which contacts the said luminous layer (3) is given to an easily bonding process, The any one of Claims 1-4 characterized by the above-mentioned. The sign board of description.   The surface of the transparent layer (5) on which the design (4) is applied, which is in contact with the phosphorescent layer (3), is subjected to a binder treatment, according to any one of claims 1 to 4. Sign board. Placing the transparent layer (5) on the hot platen (9) with the surface subjected to the design (4) facing up;
Placing a mold (7) on the transparent layer (5);
Pouring a thermosetting resin material (31) kneaded with a phosphorescent agent into the mold (7);
After the phosphorescent agent settles and separates into the phosphorescent layer (3) and the adhesive layer (6), a substrate (1) having a white reflective layer (2) formed on one surface (11) is used as the white reflective layer. A step of disposing on the adhesive layer (6) such that (2) is disposed on the phosphorescent layer (3) side;
Removing the mold (7) after the thermosetting resin material (31) is cured;
A marking plate manufacturing method comprising: a finishing step of cutting an unnecessary portion after taking out a product from the hot platen (9).   After separating into the phosphorescent layer (3) and the adhesive layer (6), after adjusting the thickness (t) of the adhesive layer (6) to 0.1 to 1.0 mm, the substrate (1) is The method for producing a sign board according to claim 7, wherein the signboard is arranged on the adhesive layer (6).

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