JP6168291B2 - Optical member, lighting device, and method of manufacturing optical member - Google Patents

Description

  The present invention relates to an optical member, and more particularly to an optical member used in a lighting device.

  A technique is known in which a coating film that improves optical performance or a coating film having a wavelength control function is formed on an optical member used in an illumination device, and a function is added to the optical member.

  As an example of the optical member used in the illumination device, a globe for a ceiling light can be given. The globe for ceiling light is made by heating a thermoplastic resin plate with a thickness of several millimeters to 160 ° C or higher and softening it by sending compressed air along the mold (molding machine) of the globe. It is formed by making it.

JP 2010-202714 A JP 2010-222177 A JP 2004-137261 A JP 2004-143145 A

  When molding a glove in which a coating film as described above is formed on a thermoplastic resin plate, the surface on which the coating film of the thermoplastic resin plate is formed may stick to the molding machine when the thermoplastic resin plate is softened. is there. In such a case, when removing the molded glove from the molding machine, it is a problem that scratches and foreign matter adhere to the coating film of the glove.

  Then, an object of this invention is to provide the optical member with which a crack and a foreign material do not adhere easily to a coating film at the time of shaping | molding.

  The optical member which concerns on 1 aspect of this invention consists of a base material with which the coating film was formed on the surface, and the said coating film contains the some particle | grains which protruded in the external air rather than the surface of the said coating film.

  Further, for example, the base material may be a thermoplastic resin, and may be molded by being heated, and the plurality of particles may have heat resistance equal to or higher than a predetermined temperature.

  For example, the plurality of particles may have heat resistance of 160 ° C. or higher.

  Further, for example, the coating film may include 5 to 50 parts by mass of the plurality of particles with respect to 100 parts by mass of the solid content of the resin component of the coating film.

  Further, for example, the coating film may include 10 to 40 parts by mass of the plurality of particles with respect to 100 parts by mass of the solid content of the resin component of the coating film.

  For example, the average particle diameter of the plurality of particles may be larger than the film thickness of the coating film.

  Moreover, for example, the average particle diameter of the plurality of particles is smaller than the film thickness of the coating film, and the coating film has 10 to 50 parts by mass with respect to 100 parts by mass of the solid content of the resin component of the coating film. Of said particles may be included.

  For example, each of the plurality of particles may have a surface free energy smaller than that of the coating film.

  For example, each of the plurality of particles may have a specific gravity smaller than that of the coating film.

  Further, for example, each of the plurality of particles has a non-spherical shape, each of the plurality of particles has a specific gravity bias in the particle, and at least a part of the particles has a specific gravity higher than that of the coating film. May be small.

  For example, the plurality of particles may not be dissolved or reacted with the coating film.

  For example, the base material and the coating film may have translucency.

  In addition, for example, the optical member may be used in a lighting device and transmit light from a light source included in the lighting device.

  An illumination device according to one embodiment of the present invention includes any one of the optical members described above and a light source.

  The manufacturing method of the optical member which concerns on 1 aspect of this invention applies the coating material containing a some particle | grain to at least one main surface of a plate-shaped base material, The said several particle | grains on said at least one main surface An optical member is generated by forming a coating film in which at least a part of the film protrudes to the outside air side from the surface and thermoforming the base material on which the coating film is formed.

  ADVANTAGE OF THE INVENTION According to this invention, when removing from a molding machine, the optical member which a damage | wound and a foreign material cannot adhere easily to a coating film is implement | achieved.

FIG. 1 is a schematic diagram for explaining a method of molding an optical member. FIG. 2 is a schematic cross-sectional view for explaining a method for molding an optical member. FIG. 3 is an external perspective view of the lighting apparatus according to Embodiment 1. FIG. FIG. 4 is a schematic cross-sectional view for explaining the configuration of the globe according to the first embodiment. FIG. 5 is a table showing the relationship between globe examples and the amount of particles added. FIG. 6 is a schematic cross-sectional view illustrating a configuration of a glove according to each example. FIG. 7 is a flowchart of a method for manufacturing a glove. FIG. 8 is a schematic cross-sectional view showing a configuration of a globe using non-spherical particles.

(Knowledge that became the basis of the present invention)
As described in the background art, when the optical member is molded, there is a problem that the coating film of the optical member sticks to the molding machine, and scratches and foreign matters adhere to the coating film.

  FIG. 1 is a schematic diagram for explaining a method of molding an optical member. FIG. 2 is a schematic cross-sectional view for explaining a method for molding an optical member.

  As shown in FIG. 1, in the molding machine 200a, the thermoplastic resin plate 50 on which the coating film 140 is formed is arranged so that the coating film 140 and the molding machine 200a are in direct contact with each other.

  Here, in a state where the molding machine 200b is superimposed on the molding machine 200a, the thermoplastic resin plate 50 is heated to about 160 ° C. and softened. Then, by sending compressed air from the molding machine 200a side into the molding machine 200a and the molding machine 200b, the thermoplastic resin plate 50 is molded into a shape along a mold determined by the molding machine 200a and the molding machine 200b.

  Finally, the optical member 30 is obtained by removing the molded thermoplastic resin plate 50 from the molding machine 200a and the molding machine 200b.

  Here, as shown in FIG. 2, the optical member 30 after molding (or the thermoplastic resin plate 50 before molding) has the coating film 140 in contact with the molding machine 200a. Therefore, when removing the optical member 30 from the molding machine 200a, the problem is that scratches and foreign matter adhere to the coating film 140 of the optical member 30.

  Here, Patent Document 1 discloses a technique for improving the moldability and releasability of the thermoplastic resin plate 50 by adding a material called an antistatic agent or a release agent to the thermoplastic resin plate 50. ing.

  However, in the case as shown in FIG. 2, since the coating film is in contact with the molding machine 200a, the effects of the antistatic agent and the release agent contained in the thermoplastic resin plate 50 cannot be obtained.

  Further, as a technique for improving the releasability, a release agent coating (Patent Document 2), an additive for improving the releasability (Patent Documents 3 and 4), and the like are known. However, these techniques cannot prevent contact between the coating film 140 and the molding machine 200a, and cannot prevent the coating film 140 from being damaged or adhered to foreign matter.

  Accordingly, the inventors of the present application have found a configuration in which scratches on the coating film are prevented by reducing the physical contact area between the coating film 140 and the molding machine 200a and improving the releasability of the optical member 30.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. Each figure is a schematic diagram and is not necessarily illustrated exactly.

  It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, components, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

(Embodiment 1)
First, the lighting apparatus according to Embodiment 1 will be described.

  FIG. 3 is an external perspective view of the lighting apparatus according to Embodiment 1. FIG.

  As shown in FIG. 3, the lighting device 100 (lighting fixture) includes a fixture main body 110, a light emitting module 120 (light source), and a globe 130 (optical member).

  The illumination device 100 is a circular ceiling light.

  The instrument main body 110 has a function of supplying power to the light emitting module 120 to turn off and turn on the light emitting module 120. The instrument body 110 is attached to the ceiling. A glove 130 is attached to the instrument body 110.

  The light emitting module 120 is a COB (Cnip On Board) type light emitting module in which a plurality of LEDs (Light Emitting Diodes) as light emitting elements are mounted on an annular substrate.

  The light emitting module 120 is not limited to such a mode. The light emitting module 120 includes, for example, a SMD (Surface Mount Device) including a resin container having a recess, an LED chip mounted in the recess, and a sealing member (phosphor-containing resin) sealed in the recess. ) Type light emitting module may be used. The light emitting module 120 may be a light emitting element using a semiconductor light emitting element such as a semiconductor laser, or another solid light emitting element such as an EL element such as an organic EL (Electro Luminescence) or an inorganic EL. Further, instead of the light emitting module 120, an illumination light source such as an annular LED lamp or a fluorescent lamp may be used.

  The globe 130 is an optical member that is used in the lighting device 100 and transmits light from the light emitting module 120 (light source) included in the lighting device 100, and also functions as a cover that covers the light emitting module 120. The globe 130 is made of a light-transmitting material in order to extract the light emitted from the light emitting module 120 to the outside of the lamp. Note that the light-transmitting material includes not only a transparent material but also a material that transmits light, although the shape on the other side cannot be clearly recognized through the material.

  The globe 130 is formed by the method described with reference to FIG. In the glove 130 molded by the method of FIG. 1, a coating film is formed on the inner surface of the globe 130, but depending on the structure of the molding machine 200a and the molding machine 200b, the coating film is formed on the outer surface of the globe 130. May be formed. Moreover, the coating film 140 may be formed on both the inner surface and the outer surface of the globe 130.

  Globe 130 according to Embodiment 1 is characterized in that the coating film contains particles. FIG. 4 is a schematic cross-sectional view for explaining the configuration of the globe 130.

  As shown in FIG. 4, the globe 130 includes a base material 150 having a coating film formed on the surface thereof, and the coating film 140 includes a plurality of particles 160 that protrude to the outside of the surface of the coating film 140. It is. A part of at least some of the plurality of particles 160 protrudes to the outside air side (the side opposite to the contact surface of the coating film 140 with the substrate 150) from the surface of the coating film 140.

  As a result, the physical contact area between the coating film 140 and the molding machine 200a is reduced, so that when the optical member 30 is removed from the molding machine 200a, there is a risk that scratches or foreign substances adhere to the coating film 140 of the optical member 30. Can be reduced.

  Hereinafter, specific examples of members constituting the globe 130 will be described in detail.

[Base material]
The base material 150 is not particularly limited as long as it is a thermoplastic resin. The base material 150 is, for example, an acrylic resin (PMMA), polycarbonate, polypropylene, PET (Polyethylene terephthalate) resin, fluororesin, polyvinyl chloride, or the like. Moreover, the base material 150 has translucency.

[Coating]
The coating film 140 is a thermoplastic resin and is not particularly limited as long as it is in close contact with the substrate 150. The coating film 140 is, for example, an acrylic resin or a nitrocellulose resin. Moreover, the coating film 140 has translucency.

[particle]
The particles 160 are not particularly limited regardless of whether they are organic or inorganic materials. The particles 160 are, for example, particles of silicone, PMMA, MMA (Methyl Methacrylate), styrene, benzoguanamine, divinylbenzene, or the like as long as they are organic particles. The particles 160 are particles of silica, alumina, zirconia, magnesia, titania or the like if they are inorganic particles.

  It is desirable that the particles 160 have heat resistance equal to or higher than a predetermined temperature and do not melt or deform at the predetermined temperature when the base material 150 is thermoformed. More specifically, the particles 160 desirably have heat resistance of 160 ° C. or higher (the temperature at which the particles 160 start to melt or deform is 160 ° C. or higher). As described above, when the base material 150 is molded, the base material 150 is heated, but the upper limit of the temperature during heating is generally slightly over 160 ° C. (160 ° C. to 180 ° C.). Therefore, when the particle 160 has a heat resistance of 160 ° C. or higher, the shape of the particle 160 is not deformed when the globe 130 is formed, and the damage preventing effect by the particle 160 can be reliably obtained.

  The particles 160 are preferably those that do not dissolve or react with the coating film 140. However, a part of the particles 160 may be dissolved or reacted in the coating film 140 as long as the particles 160 protrude to the outside of the surface of the coating film 140. Here, “dissolution or reaction” means that the coating film 140 (paint) is chemically dissolved or reacts, and that the particles 160 are necessarily dissolved or reacted by heat. is not.

  Next, a more preferable example of the size, properties, and addition amount of the particles 160 in the globe 130 will be described.

  FIG. 5 is a table showing a relationship between an example of the globe 130 and the amount of particles added.

  FIG. 5 shows the state of the coating film 140 when the particle 160 is removed from the molding machine 200a for each of the four examples (Examples 1 to 4) of the size and properties of the particle 160 for each addition amount of the particle 160. Yes. Here, the state of the coating film 140 is specifically set in the molding machine 200a so that the surface on which the coating film 140 is formed contacts the molding machine 200a, and then the substrate 150 is heated. Then, it is the state of the coating film when it is molded into the glove 130 and the glove 130 is further removed. Further, the state of the coating film 140 means the presence or absence of scratches or deposits on the coating film 140.

  Hereinafter, each of the four embodiments will be described in detail with reference to FIG. 5 and FIG.

[Example 1]
First, Example 1 will be described. FIG. 6A is a schematic cross-sectional view illustrating the configuration of the globe 130a according to the first embodiment.

  In Example 1, the base material 150 is a PMMA plate having a thickness of 1.4 mm.

  In Example 1, the coating film 140 is formed by spraying a base material 150 by spraying a paint in which a naphthalene-based benzoxazoyl derivative having a function of absorbing light having a wavelength in the near ultraviolet region and a plurality of particles 160a are added to an acrylic resin. It is formed by applying to. 30 parts by mass of the naphthalene-based benzoxazoyl derivative is added to 100 parts by mass of the solid content of the resin component of the coating film 140.

  The film thickness of the coating film 140 (thickness of the coating film 140) is 8 μm. The plurality of particles 160a are silicone fine particles having an average particle diameter of 11 μm. That is, the average particle diameter of the plurality of particles 160 a is about 1.4 times the film thickness of the coating film 140.

  As described above, in Example 1, the average particle diameter of the particles 160 a is larger than the film thickness of the coating film 140. Therefore, as shown in FIG. 6A, a part of the particles 160 a protrudes to the outside air side from the surface of the coating film 140. Since the contact area between the coating film 140 and the molding machine 200a is reduced by the protrusion of the particles 160a toward the outside air, the effect of reducing scratches and deposits on the coating film 140 can be obtained.

  The preferred amount of particles added in Example 1 is shown in the column “Example 1” in FIG. When the addition amount of the particles 160a is changed with respect to 100 parts by mass of the solid content of the resin component of the coating film 140, when the addition amount of the particles 160a is 5 to 50 parts by mass, the scratches on the coating film 140 are visually observed. There is little to the extent that it is difficult to confirm, and the effect of preventing scratches is high. In particular, when the addition amount of the particles 160a is 10 to 40 parts by mass, the coating film 140 is hardly scratched, and the scratch prevention effect is further enhanced.

[Example 2]
Next, Example 2 will be described. FIG. 6B is a schematic cross-sectional view illustrating the configuration of the globe 130b according to the second embodiment.

  In Example 2, the base material 150 is a PMMA plate having a thickness of 1.4 mm.

  In Example 2, the coating film 140 is formed by spraying a base material 150 by spraying a paint in which a naphthalene-based benzoxazoyl derivative having a function of absorbing light having a wavelength in the near ultraviolet region and a plurality of particles 160b are added to an acrylic resin. It is formed by applying to. 30 parts by mass of the naphthalene-based benzoxazoyl derivative is added to 100 parts by mass of the solid content of the resin component of the coating film 140.

  The film thickness of the coating film 140 is 8 μm. The plurality of particles 160b are silicone fine particles having an average particle size of 4.3 μm. That is, the average particle diameter of the plurality of particles 160 b is about 50% of the film thickness of the coating film 140.

  As described above, in Example 2, the average particle diameter of the particles 160 b is smaller than the film thickness of the coating film 140. However, as shown in FIG. 6B, when the paint is applied to the substrate 150, the particles 160b overlap each other, and at least some of the particles 160b among the plurality of particles 160b It naturally protrudes to the outside air side from the surface of the coating film 140. Since the contact area between the coating film 140 and the molding machine 200a is reduced by the protrusion of the particles 160b toward the outside air, the effect of reducing scratches and deposits on the coating film 140 can be obtained.

  Suitable addition amount of the particles in Example 2 is shown in the column of “Example 2” in FIG. When the addition amount of the particles 160b is changed with respect to 100 parts by mass of the solid content of the resin component of the coating film 140, when the addition amount of the particles 160b is 10 to 50 parts by mass, the scratches on the coating film 140 are visually observed. There is little to the extent that it is difficult to confirm, and the effect of preventing scratches is high. In particular, when the addition amount of the particles 160b is 20 to 40 parts by mass, the coating film 140 is hardly scratched, and the scratch prevention effect is even higher.

[Example 3]
Next, Example 3 will be described. FIG. 6C is a schematic cross-sectional view illustrating the configuration of the globe 130 c according to the third embodiment.

  In Example 3, the base material 150 is a PMMA plate having a thickness of 1.4 mm.

  In Example 3, the coating film 140 is formed by spraying a base material 150 by spraying a paint in which a naphthalene-based benzoxazoyl derivative having a function of absorbing light having a wavelength in the near ultraviolet region and a plurality of particles 160c are added to an acrylic resin. It is formed by applying to. 30 parts by mass of the naphthalene-based benzoxazoyl derivative is added to 100 parts by mass of the solid content of the resin component of the coating film 140.

  The film thickness of the coating film 140 is 8 μm. The plurality of particles 160c are hydrophobic silica particles having an average particle diameter of 8 μm.

As described above, in Example 3, the film thickness of the coating film 140 and the particle size of the particles 160c are the same, but the particles 160c are hydrophobic. In other words, the particle 160 c has a surface free energy (energy per unit area: mJ / m ² ) smaller than that of the coating film 140.

  Therefore, as shown in FIG. 6C, when the paint is applied to the base material 150, the particles 160 c protrude from the surface of the coating film 140 to the outside air side. Since the contact area between the coating film 140 and the molding machine 200a is reduced by the protrusion of the particles 160c toward the outside air, an effect of reducing scratches and deposits on the coating film 140 can be obtained.

  The preferred amount of added particles in Example 3 is shown in the column “Example 3” in FIG. When the addition amount of the particles 160c is changed with respect to 100 parts by mass of the solid content of the resin component of the coating film 140, when the addition amount of the particles 160c is 5 to 50 parts by mass, the scratches on the coating film 140 are visually observed. There is little to the extent that it is difficult to confirm, and the effect of preventing scratches is high. In particular, when the addition amount of the particles 160c is 10 to 40 parts by mass, the coating film 140 is hardly scratched, and the scratch prevention effect is even higher.

[Example 4]
Next, Example 4 will be described. FIG. 6D is a schematic cross-sectional view illustrating a configuration of a globe 130d according to the fourth embodiment.

  In Example 4, the base material 150 is a PMMA plate having a thickness of 1.4 mm.

  In Example 4, the coating film 140 is formed by spraying a base material 150 by spraying a paint in which a naphthalene-based benzoxazoyl derivative having a function of absorbing light having a wavelength in the near ultraviolet region and a plurality of particles 160d are added to an acrylic resin. It is formed by applying to. 30 parts by mass of the naphthalene-based benzoxazoyl derivative is added to 100 parts by mass of the solid content of the resin component of the coating film 140.

  The film thickness of the coating film 140 is 8 μm. The plurality of particles 160c are true spherical fine particles of crosslinked polybutyl methacrylate having an average particle diameter of 8 μm.

  As described above, in Example 4, the film thickness of the coating film 140 and the particle size of the particles 160d are the same, but the particle 160c has a specific gravity smaller than the resin component of the coating film 140 (the specific gravity is light). .

  Therefore, as shown in FIG. 6D, when the coating material is applied to the base material 150, the particles 160 d protrude from the surface of the coating film 140 to the outside air side. Since the contact area between the coating film 140 and the molding machine 200a is reduced by the protrusion of the particles 160d toward the outside air, the effect of reducing scratches and deposits on the coating film 140 can be obtained.

  The preferred amount of added particles in Example 4 is shown in the column “Example 4” in FIG. When the addition amount of the particles 160d is changed with respect to 100 parts by mass of the solid content of the resin component of the coating film 140, when the addition amount of the particles 160d is 5 to 50 parts by mass, the scratches on the coating film 140 are visually observed. There is little to the extent that it is difficult to confirm, and the effect of preventing scratches is high. In particular, when the addition amount of the particles 160d is 10 to 40 parts by mass, the coating film 140 is hardly scratched, and the scratch prevention effect is even higher.

  Heretofore, more preferable examples of the size, nature, and addition amount of the particles 160 in the globe 130 have been described. Next, a method for manufacturing the globe 130 will be described.

  FIG. 7 is a flowchart of a method for manufacturing the globe 130.

  First, by applying a paint containing a plurality of particles 160 to at least one main surface of the plate-like substrate 150, the coating film 140 in which at least a part of the plurality of particles 160 protrudes to the outside of the surface is formed. Form (S101).

  At this time, in general, the base material 150 is arranged so that one main surface faces upward in the direction of gravity, and a paint containing a plurality of particles 160 is applied to the one main surface of the base material 150 by spraying. To do.

  Here, if the paint is applied thinner than the average particle diameter of the particles 160, at least a part of the plurality of particles 160 can be protruded from the surface to the outside as shown in FIG. Further, even when the paint is applied thicker than the average particle diameter of the particles 160, at least a part of the plurality of particles 160 is overlapped as shown in FIG. Can be protruded to the outside side of the surface.

  Further, when the specific gravity of the particle 160 is smaller than the specific gravity of the coating film 140 or when the surface free energy of the particle 160 is smaller than that of the coating film 140, the particle 160 floats up in the direction of gravity. For this reason, as shown in (c) and (d) of FIG. 6, at least a part of the plurality of particles 160 can protrude from the surface to the outside air side.

  Then, the base material 150 on which the paint is completely dried and the coating film 140 is formed is heat-molded by the molding machines 200a and 200b to generate an optical member (S102).

  Specifically, for example, as shown in FIG. 1, the base material 150 is disposed on the molding machine 200a so that the coating film 140 and the molding machine 200a are in direct contact with each other. Then, in a state where the molding machine 200b is superimposed on the molding machine 200a, the base material 150 is heated to about 160 ° C. and softened. Then, by sending compressed air into the molding machine 200a and the molding machine 200b from the molding machine 200a side, the thermoplastic resin plate 50 is molded into a shape along the mold determined by the molding machine 200a and the molding machine 200b. 130 is generated.

  Finally, the globe 130 is removed from the molding machine 200a and the molding machine 200b. At this time, since the contact area between the molding machine 200a and the coating film 140 is reduced by the particles 160, when removing the glove 130 generated from the molding machine 200a, scratches and foreign matter are less likely to adhere to the coating film 140, and the appearance The occurrence of defects is suppressed.

  The molding machines 200a and 200b are compressed air injection molding machines, but the molding machine may be other molding machines such as a hot press type molding machine.

  Heretofore, the globe 130 (the globes 130a to 130d) and the manufacturing method thereof according to the first embodiment, and the lighting device 100 including the globe 130 (the globes 130a to 130d) have been described.

  Since globe 160 according to Embodiment 1 has particles 160 protruding from the surface of coating film 140 toward the outside air, the contact area between molding machine 200a and coating film 140 is small, and the coating film is removed when removed from molding machine 200a. Scratches and foreign objects are difficult to adhere to. That is, according to the globe 130, the high-quality lighting device 100 is realized.

  In Embodiment 1, the particle 160 has been described as being spherical, but the shape of the particle 160 is not limited to being spherical. Even if the shape of the particle 160 is other shapes, the scratch preventing effect can be obtained as long as the particle 160 protrudes from the surface of the coating film to the outside air side.

  FIG. 8 is a schematic cross-sectional view showing a configuration of a globe using non-spherical particles.

  In the globe 130e shown in FIG. 8, the particle 160e is an ellipsoid (rugby ball shape). Further, the particle 160e has a specific gravity on one end side larger than that on the other end side in the direction of the maximum particle size. And the specific gravity of the other end side of the particle 160e is smaller than the specific gravity of the coating film 140. That is, the particle 160 e has a specific gravity bias in the particle 160 e in the direction of the maximum particle diameter, and at least a part of the particle 160 e has a specific gravity smaller than that of the coating film 140.

  Therefore, as shown in FIG. 8, each of the particles 160 e has one end side located in the coating film 140 and the other end side protruding from the surface of the coating film 140 to the outside air side. Such a protrusion of the particles 160e can also provide a scratch preventing effect.

  Moreover, in Embodiment 1, although the coating film 140 was mainly demonstrated as what has a function which absorbs the light of the wavelength of a near ultraviolet region, the function of the coating film 140 is limited to such a function. For example, an insect repellent function or the like may be used.

  In the first embodiment, the globe 130 has been described as an example of the optical member. However, the present invention can be applied to other optical members such as a filter as long as it is an optical member on which a coating film is formed. The optical member means a member that transmits light (a member through which light passes).

  Moreover, although Embodiment 1 demonstrated as the illuminating device 100 was a ceiling light, the form of an illuminating device is not specifically limited. The lighting device may be, for example, a base light, a down light, a spot light, a desk stand, or the like.

  In addition, this invention is not limited to these embodiment or its modification. Unless it deviates from the gist of the present invention, various modifications conceived by those skilled in the art are applied to the present embodiment or the modification thereof, or a form constructed by combining different embodiments or components in the modification. It is included within the scope of the present invention.

DESCRIPTION OF SYMBOLS 30 Optical member 50 Thermoplastic resin board 100 Illuminating device 110 Instrument main body 120 Light emitting module 130, 130a-130e Globe (optical member)
140 coating film 150 base material 160, 160a to 160e particles

Claims (15)

By applying a coating material containing a plurality of particles to at least one main surface of a plate-like light-transmitting substrate, at least a part of the plurality of particles on the at least one main surface is outside air than the surface. Forming a protruding film on the side,
The base material on which the coating film is formed is arranged so that the coating film contacts a molding machine,
The manufacturing method of the optical member which produces | generates an optical member by heat-molding the said base material in which the said coating film was formed in the shape along the said molding machine. The base material is a thermoplastic resin and is molded by being heated,
The method for manufacturing an optical member according to claim 1, wherein the plurality of particles have heat resistance equal to or higher than a predetermined temperature. The method for producing an optical member according to claim 2, wherein the plurality of particles have heat resistance of 160 ° C. or higher. The optical film according to any one of claims 1 to 3, wherein the coating film includes 5 to 50 parts by mass of the plurality of particles with respect to 100 parts by mass of the solid content of the resin component of the coating film. Production method. The optical film according to any one of claims 1 to 3, wherein the coating film includes 10 to 40 parts by mass of the plurality of particles with respect to 100 parts by mass of the solid content of the resin component of the coating film. Production method. The method for producing an optical member according to claim 1, wherein an average particle diameter of the plurality of particles is larger than a film thickness of the coating film. The average particle size of the plurality of particles is smaller than the film thickness of the coating film,
The method for producing an optical member according to claim 1, wherein the coating film includes 10 to 50 parts by mass of the particles with respect to 100 parts by mass of a solid content of the resin component of the coating film. . The method for producing an optical member according to claim 1, wherein each of the plurality of particles has a surface free energy smaller than that of the coating film. The method for producing an optical member according to claim 1, wherein each of the plurality of particles has a specific gravity smaller than that of the coating film. Each of the plurality of particles has a non-spherical shape,
The optical particles according to any one of claims 1 to 8, wherein each of the plurality of particles has a specific gravity bias in the particles, and at least a part of the particles has a specific gravity smaller than that of the coating film. Production method. The method for producing an optical member according to claim 1, wherein the plurality of particles do not dissolve or react with the coating film. Before Kinurimaku the method for producing an optical member according to any one of claims 1 to 11 having a light-transmitting property. The method for manufacturing an optical member according to any one of claims 1 to 12, wherein the optical member is a glove that constitutes an outline of the lighting device , and transmits light from a light source included in the lighting device. It consists of a base material with a coating film formed on the surface,
The coating film includes a plurality of particles protruding to the outside air side from the surface of the coating film,
Each of the plurality of particles has a non-spherical shape,
Each of the plurality of particles has a specific gravity bias in the particles, and at least a part of the particles has a specific gravity smaller than that of the coating film. The optical member according to claim 14,
A lighting device comprising a light source.

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