JP4802698B2 - Manufacturing method of luminescent products - Google Patents

Description

The present invention relates to a manufacturing method of light-emitting products.

  Conventionally, a guidance display board using a fluorescent lamp or the like is used to display emergency exits such as subway stations and department stores.

  Such a guidance display board exhibits a guidance display function by illuminating a fluorescent lamp from the back with respect to character information so that the light of the fluorescent lamp transmits the character information.

As a document disclosing related conventional examples, there is Patent Document 1.
Japanese Patent No. 3295229

  However, there is a possibility that power will be cut off in an emergency such as a disaster, fire or terrorism. In that case, the fluorescent lamp is not turned on, and the emergency exit display, the evacuation direction display, and the like cannot be notified to the general public (passers, evacuees, victims).

  Therefore, it is conceivable to manufacture a guide display board using a phosphorescent material capable of storing light.

  In general, products using phosphorescent materials have low luminous intensity and poor visibility when the amount of phosphorescent material is small, so it is necessary to manufacture with a large amount of phosphorescent material. Is done.

  However, if the blending ratio is increased in order to increase the amount of phosphorescent material, the molecular bond of the transparent resin material that becomes the base material of the product becomes weak, resulting in a brittle product (brittle material) and a (product) shape. It will be difficult to maintain.

  Moreover, since the phosphorescent material is expensive, as the amount of the phosphorescent material is increased, the price of the product is increased.

  This invention is made | formed in view of the above situations, and it aims at making luminous luminance high, suppressing the usage-amount of a phosphorescent material.

In order to achieve the above object, the present invention provides:
A first step of forming a layer of granular phosphorescent material;
A thermoplastic transparent resin material melted by heating is poured into one surface side of the layer of the phosphorescent material formed by the first step, and mixed with the granular phosphorescent material, whereby the phosphorescent material layer as other surface denser concentration of the phosphorescent material, so that the concentration of the phosphorescent material as one side decreases, the concentration of the phosphorescent material is configured such that different in the thickness direction with respect to the transparent resin material A second step of obtaining a sheet-form blended gradient layer;
It is characterized by including.

  In this way, a region (layer) in which the concentration of the phosphorescent material is high and a region (layer) in which the concentration of the phosphorescent material is high are formed by providing the compounding gradient of the phosphorescent material in the thickness direction of the sheet-like compounded inclined layer (luminescent product). be able to. The light emission luminance in the region where the concentration of the phosphorescent material is high is higher than that in the conventional case where the phosphorescent material is not mixed. That is, according to the manufacturing method as described above, it is possible to increase the light emission luminance while suppressing the amount of the phosphorescent material used.

Further, the first step and the second step are performed on the sheet-like transparent resin layer formed into a sheet shape (after forming the phosphorescent material layer, a thermoplastic transparent resin material melted by heating is poured into the sheet-like transparent resin layer. )
The blended gradient layer may be laminated on the sheet-like transparent resin layer.

  Thereby, a compounding gradient layer can be protected with a sheet-like transparent resin layer. Therefore, the wear resistance and durability of the luminescent product can be improved.

Further, the first step and the second step are performed again on the blended gradient layer obtained in the second step (a thermoplastic transparent resin material melted by heating after forming a layer of phosphorescent material) By pouring in)
The blended gradient layer may be formed by stacking multiple layers.

Thereby, since the area | region where the density | concentration of a phosphorescent material is deep can be provided inside a product further (separately), the luminescent performance of a luminescent product can be maintained highly. (For example, even if a region where the concentration of the phosphorescent material is high in the luminescent product is worn away due to wear, the region where the concentration of the phosphorescent material inside the product is high exhibits the luminous performance.)
In addition, the said process is good to be performed by the continuous sheet molding method.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to make luminous brightness high, suppressing the usage-amount of a phosphorescent material.

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the invention is applied and various conditions. It is not intended to limit the scope to the following embodiments.

  FIG. 1 is a schematic cross-sectional view showing a phosphorescent display guide plate 1 as a luminescent product according to Example 1 of the present invention.

  As shown in FIG. 1, the phosphorescent display guide plate 1 of the present embodiment includes a phosphorescent body (mixed gradient layer) 2 and a character display layer (marking layer) 5.

  FIG. 2 is a schematic cross-sectional view showing the phosphor main body 2. FIG. 3 is a diagram illustrating the blending amounts of the transparent resin material component and the phosphorescent material component in the thickness d direction of the phosphorescent body 2. In addition, in order to give a softness | flexibility and material strength as a transparent resin material of a present Example, the hardly yellowing transparent polyurethane material (henceforth transparent urethane material) is used.

  As shown in FIG. 3, the phosphor main body 2 of the present embodiment is configured with an inclination distribution in the blending (mixing) ratio of the transparent urethane material component and the phosphorescent material component in the thickness d direction.

  That is, in the phosphor main body 2, as shown in FIG. 2, a phosphorescent material rich layer 3 containing a large amount of phosphorescent material is provided on the surface 6 side, and on the opposite surface 7 side opposite to the surface 6. Is provided with a transparent urethane rich layer 4 containing less phosphorescent material and more transparent urethane material.

  By providing the phosphorescent material rich layer 3 as described above, the phosphorescent function can be enhanced, and by providing the transparent urethane rich layer 4, the strength of the material (transparent urethane material) can be maintained.

  The character display layer 5 is for displaying “emergency exit”, “evacuation exit”, “fire extinguisher”, etc. as shown in FIG. Characters are displayed by light emission from the body 2.

  Hereinafter, the manufacturing method of the phosphorescent display guide plate 1 of a present Example is demonstrated concretely.

  FIG. 4 is a schematic view showing the manufacturing apparatus 10 for the phosphorescent display guide plate 1. 5A and 5B are schematic views showing an embodiment of the AA cross section of FIG.

  A manufacturing apparatus 10 shown in FIG. 4 is an apparatus that manufactures the phosphorescent display guide plate 1 by a continuous sheet molding method.

  The granular phosphorescent material 11 is accommodated in the phosphorescent material accommodating portion 12 and is dispersed on the steel belt 13 from the phosphorescent material accommodating portion 12. The steel belt 13 is stretched by rollers 17 and 18, and when the roller 17 rotates in the direction of arrow B shown in FIG. 4, the steel belt 13 rotates in the direction of arrow C shown in FIG.

  The phosphorescent material 11 dispersed on the steel belt 13 is scraped off by the scraper 14, and is transported downstream in a thin layer on the steel belt 13 (first step). Here, FIGS. 5A and 5B show an example of a method for forming a thin layer of the phosphorescent material 11 on the steel belt 13.

  FIG. 5A shows a case where a recess (depression) 13 a is provided on the steel belt 13. As shown in the figure, by bringing the scraper 14 into contact with the steel belt 13, the thickness (height) and amount of the phosphorescent material 11 can be regulated in the space between the recess 13a and the scraper 14, so A thin layer of material 11 can be formed on the steel belt 13.

  FIG. 5B shows a case where the scraper 14 is provided with a recess (depression) 14a. As shown in the figure, by bringing the scraper 14 into contact with the steel belt 13, the thickness (height) and amount of the phosphorescent material 11 can be regulated in the space between the steel belt 13 and the recess 14a. A thin layer of phosphorescent material 11 can be formed on the steel belt 13.

  By applying such a method, a uniform thin layer of the phosphorescent material 11 having a predetermined thickness (height) is formed on the steel belt 13 without causing the phosphorescent material 11 to spill from the steel belt 13. It can form more reliably on the top.

  The transparent urethane material 15 is accommodated in the urethane heating unit 16, and is discharged (poured) onto the steel belt 13 from the urethane heating unit 16 while being heated and melted in the urethane heating unit 16.

  Here, the position where the transparent urethane material 15 is discharged from the urethane heating unit 16 onto the steel belt 13 is provided on the downstream side of the position where the phosphorescent material 11 on the steel belt 13 is scraped off by the scraper 14.

  That is, the transparent urethane material 15 is melted and discharged onto the steel belt 13 on which a thin layer of the phosphorescent material 11 is formed, so that the transparent urethane material 15 and the phosphorescent material 11 in the vicinity of the steel belt 13 are mixed. It will be. Thereby, in the transparent urethane material 15 poured on the steel belt 13, the concentration of the phosphorescent material 11 is high in the vicinity of the steel belt 13, and the concentration of the phosphorescent material 11 decreases as the distance from the steel belt 13 increases (compounding) A graded layer is obtained; second step).

  Further, a steel belt 20 stretched by rollers 21, 22, 23, and 24 is pressed against the steel belt 13 at a downstream side of a position where the transparent urethane material 15 is discharged from the urethane heating unit 16 onto the steel belt 13. It is provided to do. Here, the steel belt 20 rotates in the E direction when the roller 21 rotates in the D direction shown in FIG.

  The steel belt 13 and the steel belt 20 located on the outer periphery of the roller 17 are in a pressure contact state by the roller 17 being disposed between the rollers 21 and 22 and provided so that the roller 17 bites into the steel belt 20. .

  The mixture 19 in which the transparent urethane material 15 and the phosphorescent material 11 are mixed is transported between the steel belt 13 and the steel belt 20, and thereby has a predetermined thickness (about 1 to 10 mm) on the steel belt 13. Molded.

  And the mixture 19 shape | molded by the predetermined thickness on the steel belt 13 is isolate | separated from the steel belt 13 by the isolation | separation part 25, and the continuous sheet-like mixture 19 is formed.

  Thereafter, the continuous sheet-like mixture 19 is separated (divided and cut) into a predetermined width, whereby the phosphor main body 2 is obtained.

  The continuous sheet-like mixture 19 is formed by curved surface molding, that is, formed between the steel belt 13 located on the outer periphery of the roller 17 and the steel belt 20, so that it becomes substantially curved surface. Is concerned.

  In this case, after molding the continuous sheet-like mixture 19 or after the phosphorescent body 2 is obtained by separating the continuous sheet-like mixture 19 into a predetermined width, It is good to provide the process to do. The process of making it planar is not particularly limited. Since the thickness of the continuous sheet-like mixture 19 (or phosphorescent body 2) is about 1 to 10 mm, it is easy to make the mixture 19 (or phosphorescent body 2) planar even after molding. is there.

  FIG. 6 is a schematic view showing the phosphorescent display guide plate 1 constituted by the phosphorescent body 2 and the character display layer 5.

  In this embodiment, as shown in FIG. 6, the character display layer 5 is bonded to the surface 6 (light emitting surface) side of the phosphor main body 2 formed as described above by using an adhesive. The phosphorescent display guide plate 1 is formed.

  As described above, since the phosphorescent display guide plate 1 according to the present embodiment uses a light emission phenomenon (has a light emission function), it is possible to perform light emission display even when power supply is interrupted at night or in disasters. . In particular, it is very effective as an emergency exit guidance guide plate in the event of a disaster, fire, terrorism, etc., by sticking it on the floor of a subway station platform, office building, department store or the like.

  When the phosphorescent display guide plate 1 is provided on the floor surface, the phosphorescent light is vertically received, so that the light is stored more efficiently. In addition, a person (refugee) scoops the floor surface at the time of evacuation such as a disaster. Since evacuation is performed while hitting, it is more effective than a general wall-mounted emergency exit guide light.

  Here, in the case of the conventional phosphorescent product, the phosphorescent material was uniformly dispersed inside. Furthermore, since the phosphorescent material is expensive, there is a tendency to reduce the amount of phosphorescent material used in order to suppress the cost increase of the product. Therefore, the desired light emission luminance could not be obtained.

  According to the present embodiment, the phosphorescent material that has been uniformly dispersed inside is collected on the surface side, and the composition ratio is provided with a gradient distribution. It becomes possible to provide a product with high emission luminance.

  Thereby, it becomes possible to apply suitably also in disaster prevention products etc.

  FIG. 7: is a schematic sectional drawing which shows the luminous body main body (blending gradient layer) 51 which comprises the luminous storage display guide plate 50 as a luminescent product which concerns on Example 2 of this invention. In addition, the same code | symbol is attached | subjected about the component similar to Example 1 mentioned above, and the description is abbreviate | omitted.

  As shown in FIG. 7, the phosphor main body 51 of the present embodiment includes two layers, a first layer 52 as a protective layer and a second layer 53.

  The 1st layer 52 is a transparent urethane layer as a sheet-like transparent resin layer comprised by a transparent resin material (transparent urethane material).

  The second layer 53 is configured with an inclination distribution in the blending (mixing) ratio of the transparent urethane material and the phosphorescent material in the thickness d direction like the phosphorescent body 2 described in the first embodiment.

  That is, in the second layer 53, as shown in FIG. 7, the phosphorescent material rich layer 54 in which a large amount of the phosphorescent material is blended is provided on the surface 56 side, and the transparent layer in which the phosphorescent material is blended and the resin material is blended in a large amount The urethane rich layer 55 is provided on the opposite surface 57 side opposite to the surface 56.

  By providing the phosphorescent material rich layer 54 in this manner, the phosphorescent function can be enhanced, and by providing the transparent urethane rich layer 55, the strength of the material (transparent urethane material) can be maintained.

  In the present embodiment, the phosphor main body 51 is configured by providing the first layer 52 on the surface 56 side of the second layer 53.

  Since the surface 56 side of the second layer 53 has a small amount of resin material, it cannot exhibit resin characteristics (such as wear resistance), and the first layer 52 is provided on the surface 56 side of the second layer 53. If not, there is a concern that the phosphorescent material may be removed due to the surface 56 of the second layer 53 being stepped on by a pedestrian or the like.

  In the phosphorescent display guide plate 50 according to the present embodiment, since the first layer 52 is provided on the surface 56 side of the second layer 53, it is possible to further improve the wear resistance. That is, even if a pedestrian steps on the phosphorescent material, it does not come off.

  Hereinafter, a method for manufacturing the phosphorescent display guide plate 50 will be specifically described.

  FIG. 8 is a schematic view showing a manufacturing apparatus 60 for the phosphorescent display guide plate 50. FIG. 9 is a schematic view showing an embodiment of the FF cross section of FIG.

  In the manufacturing apparatus 10 described in the first embodiment, a continuous sheet-like mixture 19 is formed on the steel belt 13 by spreading the phosphorescent material 11 on the steel belt 13.

  On the other hand, in the manufacturing apparatus 60 of the present embodiment, a sheet-like (film-like) transparent urethane layer (transparent resin layer; for example, PU (polyurethane) film) 61 is pre-molded, and the transparent urethane layer 61 is Thus, the phosphorescent material 11 and the transparent urethane material 15 are mixed.

  The manufacturing apparatus 60 shown in FIG. 8 is configured by replacing the steel belt 13 portion of the manufacturing apparatus 10 shown in FIG. 3 with a transparent urethane layer 61.

And as demonstrated in Example 1, after the phosphorescent material 11 was spread | dispersed on the transparent urethane layer 61 and the transparent urethane material 15 was poured in, the transparent urethane layer 61 located in the outer periphery of the roller 17, and a steel belt 20, a mixed layer (corresponding to the second layer 53) in which the transparent urethane material 15 and the phosphorescent material 11 are mixed is welded to the transparent urethane layer 61 (corresponding to the first layer 52). Will be.

Thereby, the continuous sheet-like mixture 62 is obtained. Thereafter, the continuous sheet-like mixture 62 is separated (divided, cut) into a predetermined width,
The luminous body main body 51 which has the 1st layer 52 and the 2nd layer 53 by which the luminous material rich layer 54 was shape | molded by the 1st layer 52 side is obtained.

  In this embodiment, as shown in FIG. 9, by applying the same scraper 14 shown in FIG. 5 (b) described in Embodiment 1, a thin layer of phosphorescent material 11 on the transparent urethane layer 61 is applied. Is formed.

  FIG. 10 is a schematic view showing a phosphorescent display guide plate 50 constituted by the phosphorescent body 51 and the character display layer 5.

  In this embodiment, as shown in FIG. 10, the phosphorescent display guide plate 50 is obtained by bonding the character display layer 5 to the first layer 52 of the phosphorescent body 51 formed as described above with an adhesive. .

  In this embodiment, in addition to the effects of the first embodiment described above, an effect of further improving the wear resistance of the phosphorescent display guide plate can be obtained.

  In this embodiment, the transparent urethane layer 61 is preformed and the phosphorescent material 11 and the transparent urethane material 15 are mixed on the transparent urethane layer 61. However, the transparent urethane layer 61 is used instead. The continuous sheet-like mixture 19 formed by the manufacturing apparatus 10 of Example 1 may be applied.

  In this case, by mixing the phosphorescent material 11 and the transparent urethane material 15 as described above on the continuous sheet-like mixture 19, the phosphorescent body in which the phosphorescent body 2 shown in FIG. Obtainable. In addition to the phosphorescent material rich layer 3 on the front side, the phosphorescent display guide plate obtained by bonding the character display layer 5 to this is another phosphorescent material on the inner side (inside, opposite side) of the phosphorescent display guide plate. The rich layer 3 is provided.

  For this reason, for example, even if the surface-side phosphorescent material rich layer 3 is worn away due to wear, another inner phosphorescent material-rich layer 3 can exhibit the light emitting function. That is, in addition to the effect of the first embodiment described above, the luminous performance of the phosphorescent display guide plate can be maintained high.

  In addition, the luminous body by which the luminous body main body 2 overlapped in multiple layers can be obtained by repeating said process. Here, when the phosphorescent body 2 is stacked in multiple layers, it is preferable that the respective compounding slopes are matched (for example, the phosphorescent material rich layer 3 is positioned on the surface side in each phosphorescent body 2). However, it is not limited to this.

  Further, the phosphorescent material 11 and the transparent urethane material 15 are mixed on the luminous body main body 51 shown in FIG. 7 described in the present embodiment, that is, on the transparent urethane rich layer 55 in the luminous body main body 51. May be.

Thereby, a protective layer can be further provided on the phosphorescent body in which the phosphorescent body 2 described above overlaps in multiple layers. That is, in addition to the effects of the first embodiment described above, the luminous performance of the phosphorescent display guide plate can be maintained high, and the wear resistance of the phosphorescent display guide plate can be further improved.

  In Examples 1 and 2 described above, when the transparent urethane material 15 is poured into the thin layer of the phosphorescent material 11, if the amount of the phosphorescent material 11 is too large, the transparent urethane material 15 does not enter the thin layer of the phosphorescent material 11. (The transparent urethane material 15 does not enter the gap between the adjacent phosphorescent materials 11), and there is a concern that the phosphorescent material 11 may be removed by the transparent urethane material 15. In such a case, it becomes difficult to manage the amount of the phosphorescent material 11 at the time of manufacture.

  Therefore, in Example 3 of the present invention, in the longitudinal direction (conveying direction) of the member 70 (corresponding to the steel belt 13 of Example 1 and corresponding to the transparent urethane layer 61 of Example 2) to which the phosphorescent material 11 is dispersed. Streaks (square grooves, V grooves, etc.) are inserted, and the phosphorescent material 11 is dispersed between the streaks.

  FIG. 11 is a diagram illustrating a member 70 (corresponding to the steel belt 13 of the first embodiment and corresponding to the transparent urethane layer 61 of the second embodiment) on which the phosphorescent material 11 is sprayed from the phosphorescent material housing portion 12 in the present embodiment. is there. FIG. 11A shows a case where a square groove is provided in the longitudinal direction of the member 70, and FIG. 11B shows a case where a V groove is provided. In addition, the same code | symbol is attached | subjected about the component similar to Example 1, 2 mentioned above, and the description is abbreviate | omitted.

  The phosphorescent material 11 sprayed from the phosphorescent material accommodating portion 12 is accommodated in a concave portion (phosphorescent material accommodating portion) 71 formed by placing a streak in the member 70 as shown in FIGS. 11 (a) and 11 (b). Is done. Even if the transparent urethane material 15 is poured in this state, the transparent urethane material 15 comes into contact with the convex portions 72 between the concave portions 71 before being filled into the concave portions 71. Therefore, the transparent urethane material 15 does not discharge (extrude) the phosphorescent material 11 in the recess 71 out of the recess 71 and the recess 71 is not filled with the transparent urethane material 15. That is, the phosphorescent material 11 can remain in the recess 71, and the transparent urethane material 15 can enter the layer of the phosphorescent material 11 (the transparent urethane material 15 enters the gap between the adjacent phosphorescent materials 11).

  Further, even if the amount of the phosphorescent material 11 is too large, the phosphorescent material 11 will not be removed by the transparent urethane material 15, and the transparent urethane material 15 may enter the layer of the phosphorescent material 11. it can.

  As described above, according to the present embodiment, the phosphorescent material 11 can be better mixed with the transparent urethane material 15, so that the amount of the phosphorescent material 11 can be easily managed at the time of manufacture.

FIG. 1 is a schematic sectional view showing a luminescent product according to Example 1 of the present invention. FIG. 2 is a schematic cross-sectional view showing the phosphor body of the first embodiment of the present invention. FIG. 3 is a diagram showing the blending amounts of the transparent urethane material component and the phosphorescent material component in the thickness d direction of the phosphorescent body main body of Example 1 of the present invention. FIG. 4 is a schematic view showing an apparatus for manufacturing a luminescent product according to Example 1 of the present invention. 5A and 5B are schematic views showing an embodiment of the AA cross section of FIG. FIG. 6 is a schematic view showing a luminescent product including the phosphor main body and the character display layer of Example 1 of the present invention. FIG. 7 is a schematic cross-sectional view showing a luminous body main body constituting a luminescent product according to Example 2 of the present invention. FIG. 8 is a schematic view showing an apparatus for manufacturing a luminescent product according to Example 2 of the present invention. FIG. 9 is a schematic view showing an embodiment of the FF cross section of FIG. FIG. 10 is a schematic view showing a luminescent product constituted by the phosphor main body and the character display layer of Example 2 of the present invention. FIG. 11 is a diagram illustrating members to which the phosphorescent material is dispersed from the phosphorescent material accommodation unit in the third embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,50 Phosphorescent display guide plate 2,51 Luminous substance main body 3 Luminescent material rich layer 4 Transparent urethane rich layer 5 Character display layer 6 Surface 7 Opposite surface 10,60 Production apparatus 11 Luminous material 12 Luminous material accommodation part 13,20 13a Concave 14 Scraper 14a Concave 15 Transparent urethane material 16 Urethane heating part 17, 18, 21, 22, 23, 24 Roller 19 Mixture 25 Separating part 52 First layer 53 Second layer 54 Phosphorescent material rich layer 55 Transparent urethane rich layer 56 Surface 57 Opposite surface 61 Transparent urethane layer 62 Mixture 70 Member 71 Concave portion 72 Convex portion

Claims (3)

A first step of forming a layer of granular phosphorescent material;
A thermoplastic transparent resin material melted by heating is poured into one surface side of the layer of the phosphorescent material formed by the first step, and mixed with the granular phosphorescent material, whereby the phosphorescent material layer as other surface denser concentration of the phosphorescent material, so that the concentration of the phosphorescent material as one side decreases, the concentration of the phosphorescent material is configured such that different in the thickness direction with respect to the transparent resin material A second step of obtaining a sheet-form blended gradient layer;
The manufacturing method of the luminescent product characterized by including. By performing the first step and the second step on the sheet-like transparent resin layer formed in a sheet shape,
Method for producing a luminescent product according to claim 1, wherein the sheet-like transparent resin layer, characterized by laminating the formulation gradient layer. By performing the first step and the second step again on the blended gradient layer obtained in the second step,
Method for producing a luminescent product according to claim 1 or 2, characterized in that forming overlapping the formulation gradient layer in the multilayer.

Images