JP6296390B2 - Functional resin molding and lighting cover - Google Patents

Description

  The present invention relates to a functional resin molded product and a lighting cover. Specifically, the present invention relates to a functional resin molded product having light diffusibility, antistatic properties and water repellency, and an illumination cover formed using the functional resin molded product.

  A light transmitting / diffusing member for a lighting fixture, such as a lighting cover, covers the front side of the lighting fixture in the lighting fixture and diffuses light from the light source over the entire surface of the lighting cover. Thereby, light transmission is averaged, and unevenness of brightness and darkness is prevented from being formed on the light transmitting surface of the illumination cover. At the same time, the lighting cover is used to conceal the image of the light source and enhance the quality of the fixture.

  Conventionally, when an amount of pigment necessary for imparting sufficient diffusibility to a lighting cover is added, the light transmittance is greatly reduced, and it is inevitable that the brightness is sacrificed. That is, the light transmittance and the diffusivity are contradictory and have a trade-off relationship.

  In recent years, LED (Light Emitting Diode) lighting fixtures have attracted attention from the viewpoint of energy saving. However, since the LED light source has strong directivity, further diffusibility is required. On the other hand, LED lighting aims at energy saving. Therefore, the efficiency of LED lighting cannot be significantly reduced by the lighting cover, and higher light transmittance and light diffusibility than the conventional fluorescent lamp cover material are required.

  Here, the cover used for the lighting apparatus can be obtained by stretching and molding a resin sheet in which a resin is previously formed into a sheet shape. In a resin molded product obtained by such stretching, it is known to impart antistatic properties in order to reduce adhesion of dust and foreign matter. As a method for imparting antistatic properties, for example, a method of adding a special surfactant into a resin material is known (see, for example, Patent Documents 1 and 2). As a method for imparting antistatic properties, a method of adding an ionic material such as a quaternary ammonium salt into a resin material is also known (for example, see Patent Document 3).

  Furthermore, regarding contamination resistance to resin molded products, to reduce not only electrostatic dirt such as dust, but also hydrophobic dirt such as hydrophilic dirt and oils, in addition to antistatic properties, A technique for imparting water repellency to a resin material has been studied (see, for example, Patent Document 4). However, the antistatic function often depends on the humidity environment, and it is difficult to obtain a stable function. Therefore, when an ionic material such as a surfactant or a quaternary ammonium salt is added to the water repellent resin, the water repellency may be lowered.

  Thus, as a method for imparting antistatic properties without causing a decrease in low surface energy properties such as water repellency, a method of conjugating conductive fine particles to a resin has been considered. However, even if an attempt is made to apply a conductive material to a molded product obtained by stretching and molding the resin composition, the conductive path is cut at the time of stretching, and thus antistatic properties cannot be maintained. Furthermore, since most of the conductive particles are colored, it is necessary to suppress coloring of the molded product by adding them.

  On the other hand, in many of optical members having two functions of light diffusibility and antistatic property, (1) a method of applying an antistatic layer on a light diffusing substrate is employed (see, for example, Patent Document 5). . Or (2) the method of providing a light-diffusion layer and an antistatic layer, ie, two layers, on the translucent base material is taken (for example, refer patent document 6).

JP 2008-231240 A JP 2008-201036 A JP 2009-51983 A JP 2009-155499 A Japanese Patent Laid-Open No. 11-39910 JP 2007-225972 A

  However, in the method (1), although antistatic properties can be imparted, it is difficult to achieve both the light transmissive property and the light diffusibility of the light diffusing substrate, so that high instrument efficiency is achieved while concealing the light source. Is difficult. Further, in the method (2), since two functional layers are provided on the substrate, it is not industrially practical in terms of process and cost.

  The present invention has been made in view of such problems of the prior art. An object of the present invention is to provide a functional resin molded article and a lighting cover that are excellent in light diffusibility, antistatic properties and water repellency.

In order to solve the above problems, a functional resin molded article according to the first aspect of the present invention includes a transparent resin base material and a surface functional layer provided on the surface of the transparent resin base material. The surface functional layer contains the following components (A) to (D).
(A): Acrylic resin (B): Acrylic resin having a solid content of 5 to 100 parts by mass and a water-repellent group (C): (A ) Component and (B) light diffusing particles (D): (A) which are 25 to 80 parts by mass and the average particle size is 0.8 to 10 μm with respect to 100 parts by mass of the total solid content. 20 to 50 parts by mass of acicular conductive particles with respect to 100 parts by mass of the total solid content of the component and component (B)

The functional resin molded product according to the second aspect of the present invention includes a transparent resin base material and a surface functional layer provided on the surface of the transparent resin base material. The surface functional layer contains the following components (A) to (E).
(A): Acrylic resin (B): Acrylic resin having a solid content of 5 to 100 parts by mass and a water-repellent group (C): (A ) Component and (B) light diffusing particles (D): (A) which are 25 to 80 parts by mass and the average particle size is 0.8 to 10 μm with respect to 100 parts by mass of the total solid content. 5 to 20 parts by mass of the acicular conductive particles (E): 100 parts by mass of the total of the components (A) and (B) with respect to 100 parts by mass of the total solids of the component and the component (B) And 20 to 50 parts by mass of metal oxide particles having light diffusibility and conductivity

  In the functional resin molded product of the present invention, a surface functional layer having a specific composition is provided on a transparent resin substrate. Therefore, even if the surface functional layer is a single layer, excellent light diffusibility, antistatic properties and water repellency can be obtained.

It is the schematic which shows an example of the lighting fixture which concerns on embodiment of this invention.

  Hereinafter, the functional resin molded product and the illumination cover according to the embodiment of the present invention will be described in detail. In addition, the dimension ratio of drawing is exaggerated on account of description, and may differ from an actual ratio.

[Functional resin moldings]
The functional resin molded product according to the present embodiment includes a transparent resin base material and a surface functional layer provided on the surface of the transparent resin base material. Specifically, the functional resin molded product is provided with a surface functional layer on one surface of a transparent resin base material, and is stretch-molded according to a predetermined shape.

  As will be described later, since the surface functional layer is composed of a thermoplastic resin, if the transparent resin base material is thermoplastic, the surface functional layer can also be stretched and molded. The functional resin molded product is used with the side opposite to the surface functional layer facing the light source.

  The transparent resin base material is not particularly limited as long as it is a thermoplastic resin that has transparency and can be stretch-molded. As a transparent resin base material, what was formed by at least 1 type chosen from the group which consists of an acrylic resin (acrylic ester or methacrylic ester polymer), a polycarbonate resin, and a styrene resin, for example can be used. Among them, acrylic resin and polycarbonate resin have high light transmittance. Therefore, it is preferable that the transparent resin base material is formed with at least one of an acrylic resin and a polycarbonate resin.

  Although the thickness of a transparent resin base material is not specifically limited, For example, it is preferable that it is 0.1 mm-3 mm. In consideration of moldability and strength, the thickness of the transparent resin substrate is more preferably 1 mm to 2 mm. In addition, what was obtained by sheet molding methods, such as a glass cast manufacturing method, a continuous cast manufacturing method, an extrusion manufacturing method, can be used for a transparent resin base material.

  The functional resin molded product of this embodiment provides antistatic properties and water repellency by providing a surface functional layer on the surface of the transparent resin substrate. Such a surface functional layer includes an acrylic resin as the component (A), an acrylic resin having a water repellent group as the component (B), a light diffusion particle as the component (C), and a component (D). Of acicular conductive particles. In this specification, “acrylic resin as component (A)” is also referred to as “acrylic resin (A)”, and “acrylic resin having a water repellent group as component (B)” is referred to as “water repellent group”. Also referred to as “acrylic resin (B)”. “Light diffusing particles as component (C)” is also referred to as “light diffusing particles (C)”, and “acicular conductive particles as component (D)” is also referred to as “acicular conductive particles (D)”. Say. Further, “metal oxide particles as component (E)” described later is also referred to as “metal oxide particles (E)”.

  The component (A) is a main component of the surface functional layer and is not particularly limited as long as it is an acrylic resin. Moreover, it is preferable that the acrylic resin of (A) component does not have a water-repellent group in a molecule | numerator unlike the (B) component mentioned later.

  The acrylic resin is a resin obtained by polymerizing a (meth) acrylate monomer. The acrylic resin may be a copolymer of a (meth) acrylate monomer and a monomer having a carbon-carbon double bond. Examples of the monomer having a carbon-carbon double bond include at least one selected from the group consisting of a styrene monomer, an olefin monomer, and a vinyl monomer. “(Meth) acrylate” means acrylate or methacrylate.

  Examples of (meth) acrylate monomers include methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isobornyl (meth) acrylate, glycidyl (meth) acrylate, benzyl (meth) acrylate, stearyl (meth) acrylate, and lauryl. There may be mentioned at least one selected from the group consisting of (meth) acrylate and 2-hydroxy-3-phenoxypropyl (meth) acrylate. Examples of the styrenic monomer include styrene. Examples of the olefin monomer include ethylene and propylene. Examples of the vinyl monomer include vinyl chloride and vinylidene chloride. One of these monomer components may be used alone, or two or more thereof may be mixed and used.

  The surface functional layer in the present embodiment includes an acrylic resin (B) having a water repellent group. The water repellent group is a functional group having a particularly low surface free energy, and examples thereof include a fluoroalkyl group, a fluoroalkylene group, and an alkyl group as shown in Table 1.

Note that each of the above structural formulas is an example having 1 carbon, CF ₃ -is a perfluoromethyl group, -CF ₂ -is a perfluoromethylene group, and CH ₃ -is a methyl group. is there.

  When the molecular chain having such a chemical structure is present in the surface functional layer, it becomes possible to exhibit high water repellency, low adhesion, and easy removal. The water repellent group is preferably included as a side chain of the acrylic resin, and thereby the water repellency can be further improved.

  Moreover, it is also preferable to have a dimethylsiloxane group shown in Chemical Formula 1 as the water repellent group. Also when it has a dimethylsiloxane group, surface free energy can be reduced. In Chemical Formula 1, n is preferably an integer of 1 or more. The upper limit of n is not particularly limited, but is practically preferably 160. When n is 160 or less, film properties such as hardness are good.

  As described above, the water repellent group in the component (B) is preferably at least one of a dimethylsiloxane group and a fluoroalkyl group. The water repellent group preferably has at least one of a dimethylsiloxane group and a fluoroalkyl group in the molecular skeleton of the resin. Furthermore, from the viewpoint of enhancing water repellency, the fluoroalkyl group is preferably a perfluoroalkyl group (an alkyl group in which all hydrogen atoms are substituted with fluorine atoms).

  The acrylic resin (B) having a water repellent group preferably has a solid content of 5 to 100 parts by mass with respect to 100 parts by mass of the solid content of the acrylic resin as the component (A). When the solid content of the acrylic resin (B) is less than 5 parts by mass, the water repellency becomes insufficient. That is, when stretch molding is performed according to the shape of the lighting fixture, the water repellency of the surface functional layer after stretching becomes insufficient. When the solid content of the acrylic resin (B) exceeds 100 parts by mass, the paintability is deteriorated, and there is a possibility that the surface functional layer is not sufficiently leveled (smooth). Further, by setting the solid content of the acrylic resin (B) within this range, a uniform coating film can be obtained, and the water contact angle can be set to 90 ° to 120 °.

  In addition, not only water repellency but also oil repellency is improved by reducing the surface free energy of the surface functional layer. In consideration of maintaining water repellency for a long time, the acrylic resin (B) having a water-repellent group is 25 to 100 parts by mass with respect to 100 parts by mass of the solid content of the acrylic resin of the component (A). More preferably.

  The surface functional layer in the present embodiment includes a component (C) that is a light diffusing particle. By this light diffusion particle, the light transmission of the functional resin molded product can be averaged, and the occurrence of uneven brightness on the light transmitting surface can be suppressed.

  The light diffusing particles (C) preferably have an average particle size of 0.8 μm to 10 μm. When the average particle diameter of the light diffusing particles (C) is within this range, the light transmittance and light diffusibility of the surface functional layer can be improved. Moreover, when the process etc. which apply | coat a surface functional layer are considered, it is preferable that the film thickness of a surface functional layer is about 5 micrometers-15 micrometers. Therefore, the average particle diameter of the light diffusing particles (C) is more preferably 1 μm to 3 μm.

  The shape of the light diffusion particle (C) is not particularly limited, but is preferably spherical. That is, the aspect ratio of the light diffusing particles (C) is preferably in the range of 1.0 to 1.1. When the light diffusing particles (C) are spherical, the light diffusibility of the light diffusing particles (C) inside the surface functional layer can be further improved. In the present specification, the aspect ratio refers to an index representing the shape of a particle defined by (maximum major axis / width orthogonal to the maximum major axis) in the microscopic image of the particle. The average particle diameter and aspect ratio of the light diffusing particles (C) can be measured by observing the surface functional layer with a scanning electron microscope (SEM).

  In consideration of the balance between light transmittance and light diffusibility, the light diffusing particles of component (C) preferably have a refractive index difference of 0.05 to 0.2 with respect to component (A). When the difference in refractive index is 0.05 or more, the light diffusibility can be improved. Further, when the difference in refractive index is 0.2 or less, it is possible to maintain light transmittance while enhancing light diffusibility.

  The light diffusing particles are not particularly limited as long as they can impart light diffusibility to the surface functional layer. Examples of the light diffusing particles include at least one selected from the group consisting of benzoguanamine resin particles, styrene particles, silicone particles, melamine resin particles, polytetrafluoroethylene (PTFE) particles, and inorganic particles. Examples of the inorganic fine particles include at least one selected from the group consisting of barium sulfate, calcium carbonate, crystalline silica, amorphous silica, glass flakes, glass fibers, and glass beads.

  In order to use the functional resin molded product according to the present embodiment as a lighting cover, it is preferable that the light diffusibility can be imparted without impairing visible light transmittance. From such a viewpoint, as the light diffusing particles (C), benzoguanamine resin particles are particularly preferable. Examples of the benzoguanamine resin particles include benzoguanamine (2,4-diamino-6-phenyl-1,3,5-triazine), a condensate of benzoguanamine and formaldehyde, a condensate of benzoguanamine, melamine and formaldehyde. it can.

  Content of light-diffusion particle | grains (C) is 25-80 mass parts with respect to 100 mass parts of total solids of (A) component and (B) component. When the content of the light diffusing particles (C) is less than 25 parts by mass, the light diffusibility is not sufficiently developed, and unevenness in brightness and darkness may occur on the light transmitting surface. On the other hand, when content of light-diffusion particle | grains (C) exceeds 80 mass parts, there exists a possibility that light transmittance may fall and an instrument efficiency may deteriorate. In addition, from a viewpoint of improving both light diffusibility and light transmittance, the content of the light diffusing particles (C) is 30 to 60 with respect to 100 parts by mass of the total solid content of the component (A) and the component (B). More preferably, it is part by mass.

  The surface functional layer in the present embodiment includes acicular conductive particles (D). The acicular conductive particles (D) are substances for imparting conductivity to the surface functional layer formed as a resin layer. And since it becomes easy to discharge because electroconductivity is provided by the acicular electroconductive particle (D), it becomes possible to suppress that a surface functional layer is tinged with static electricity. Therefore, antistatic property improves by mix | blending needle-like electroconductive particle (D), and contamination of the surface of a surface functional layer can be prevented effectively.

  Here, when spherical particles are used as the conductive particles, the conductive path may be cut and charged when the surface functional layer is molded while being stretched. However, by making the conductive particles acicular, it is possible to prevent the conductive path from being cut even when the surface functional layer is stretched, and to improve the antistatic property. In other words, if needle-like conductive particles are used, the surface resistance is lowered with an addition amount smaller than that of spherical particles, and a conductive path is more easily ensured than when spherical in stretching. In other words, in the case of a needle shape, the possibility that the particles cross and contact each other in the major axis direction is higher than that in the long axis direction. Becomes higher.

  As described above, the shape of the conductive particles is preferably needle-like. Therefore, the average value of the aspect ratio of the conductive particles as the component (D) is preferably 10 or more, more preferably 15 or more, and particularly preferably 20 or more. By providing such an aspect ratio, it becomes possible to promote discharge of the surface functional layer. The upper limit of the average aspect ratio of the conductive particles is not particularly limited, but may be 100, for example.

  The lengths of the major axis and the minor axis of the acicular conductive particles (D) are not particularly limited. The acicular conductive particles (D) can have a major axis of 1 μm to 5 μm and a minor axis of 10 nm to 50 nm. Due to the lengths of the major axis and the minor axis, it is easy to form a conductive path inside the surface functional layer by contacting each other. In addition, the length of the major axis and minor axis of the acicular conductive particles (D) and the aspect ratio can also be measured by observing the surface functional layer with a scanning electron microscope (SEM).

  As the acicular conductive particles (D), it is preferable to use metal oxide particles. That is, the acicular conductive particles (D) are preferably acicular conductive metal oxides. Further, from the viewpoint of improving the conductivity, it is preferable to use, for example, a metal oxide doped with a non-oxidized metal (non-oxidized metal) as the acicular conductive particles (D). The metal oxide doped with the non-oxide metal is, for example, selected from the group consisting of antimony-doped tin oxide (antimony-doped tin dioxide), aluminum-doped zinc oxide, gallium-doped zinc oxide, indium tin oxide, and antimony-doped titanium oxide. At least one kind. Among these, conductive metal oxides generally having a high aspect ratio are preferable, and antimony-doped tin oxide and antimony-doped titanium oxide correspond thereto. Particularly preferred is antimony-doped tin oxide.

  The content of the acicular conductive particles (D) is 20 to 50 parts by mass with respect to 100 parts by mass of the total solid content of the component (A) and the component (B) when the component (E) described later is not included. is there. When the content of the acicular conductive particles (D) is less than 20 parts by mass, the antistatic property is not sufficiently exhibited, and the contaminants adhere to the surface of the resin molded product. On the other hand, when the content of the needle-like conductive particles (D) exceeds 50 parts by mass, the surface functional layer is colored and not only does not maintain the quality as a lighting cover, but also the light transmittance is reduced due to the coloring. Will be invited.

When the needle-like conductive particles (D) are blended in the above range, the surface resistivity on the surface functional layer side in the functional resin molded product according to the present embodiment can be 10 ⁷ to 10 ¹³ Ω / sq. Become. That is, the surface resistivity depends on the type and amount of the acicular conductive particles (D), but the surface resistivity can be set to a suitable range by setting the blending amount in the above range. . The surface resistivity can be measured based on Japanese Industrial Standard JIS K6911 (Thermosetting plastic general test method).

  Here, even if the acicular antimony-doped tin oxide as the acicular conductive particles (D) is set in the above range, the acicular antimony-doped tin oxide exhibiting a dark blue color is in the range of 33 to 50 parts by mass. As a result, the functional resin molded product may be slightly colored. That is, the appearance quality as a lighting cover can be kept in the range of 20 to 50 parts by mass, but the color difference can be identified as compared with the case of no addition.

  In other words, the more the antistatic function is improved, the farther the color of the resin molded product is from white, and the closer it is to white, the lower the added amount of component (D), and the lower the antistatic function of the resin molded product will be To do. The present inventor has made various studies in order to avoid such a trade-off and achieve both excellent light transmittance and light diffusibility. As a result, it has both anti-diffusion and electrical conductivity, blends less colored metal oxide particles (component (E)), and reduces the amount of antimony-doped tin oxide that exhibits a dark blue color. While improving, it became possible to suppress coloring of the resin molded product. Moreover, it has become possible to achieve both excellent light transmittance and light diffusibility.

  The metal oxide particles (E) preferably have an average particle diameter of 0.5 μm to 8 μm. When the average particle diameter of the metal oxide particles (E) is within this range, the light diffusibility of the surface functional layer can be improved. In addition, the shape of the metal oxide particles (E) is not particularly limited, but for example, a spherical shape, a scale shape, or a fiber shape is preferable. However, in order to achieve both light diffusibility and conductivity, the shape of the metal oxide particles (E) is particularly preferably scaly. When the metal oxide particles (E) are scaly, the conductive performance can be improved while further improving the light diffusibility of the metal oxide particles (E) inside the surface functional layer.

  In the scale-like metal oxide particles (E), the aspect ratio (the maximum diameter / thickness of the main surface), which is the ratio between the thickness of the metal oxide particles (E) and the maximum diameter of the main surface, is 10 to 100. It is preferable that When the aspect ratio is 10 or more, it is easy to secure a conductive path. Further, when the aspect ratio is 100 or less, it is possible to suppress a decrease in light transmittance while securing a conductive path. In addition, the average particle diameter and aspect ratio of a metal oxide particle (E) can also be measured by observing a surface functional layer with a scanning electron microscope (SEM).

  The component (E) as the metal oxide particles having both light diffusibility and conductivity is preferably at least one of gallium-doped zinc oxide and aluminum-doped zinc oxide. Since such a metal oxide has whiteness compared to the component (D) while having conductivity, it is possible to further suppress coloring of the surface functional layer.

  It is preferable that the addition amount of a metal oxide particle (E) is 20-50 mass parts with respect to 100 mass parts of total solids of (A) component and (B) component. In this case, the addition amount of acicular electroconductive particle (D) can be reduced to 5-20 mass parts with respect to 100 mass parts of total solid content of (A) component and (B) component. Therefore, coloring of the functional resin molded product can be largely suppressed while exhibiting antistatic properties. When the addition amount of the metal oxide particles (E) is less than 20 parts by mass, it is difficult to reduce the addition amount of the acicular conductive particles (D). Moreover, when the addition amount of the metal oxide particles (E) exceeds 50 parts by mass, it is necessary to lower the abundance ratio of the light diffusing particles (C) giving excellent light transmittance and light diffusibility, There is a risk of adversely affecting light transmission and light diffusibility.

  When the acicular conductive particles (D) and the metal oxide particles (E) coexist, the contact between the acicular conductive particles (D) and the metal oxide even when the functional resin molded product is stretched and molded. A conductive path is ensured by contact between the particles (E). Furthermore, a conductive path is secured also by contact between the acicular conductive particles (D) and the metal oxide particles (E). Therefore, an excellent antistatic function can be imparted while maintaining the white color of the surface functional layer.

  In addition, even if it is going to express antistatic property only by a metal oxide particle (E) without using an acicular conductive particle (D), since a metal oxide particle (E) is not acicular, before and after extending | stretching The conductive path cannot be secured, and the antistatic property is lowered. Therefore, by combining the needle-like conductive particles (D) and the metal oxide particles (E), coloring is suppressed, and further, a decrease in light transmittance is suppressed, and an antistatic property is exhibited. be able to.

  The surface functional layer is coated on a transparent resin substrate with a resin composition including at least an acrylic resin (A), an acrylic resin (B) having a water repellent group, a light diffusion particle (C), and acicular conductive particles (D). It is formed by doing. Further, the surface functional layer includes at least an acrylic resin (A), an acrylic resin (B) having a water repellent group, a light diffusion particle (C), an acicular conductive particle (D), and a metal oxide particle (E). It is formed by applying a resin composition to a transparent resin substrate.

  Here, a dispersant such as a surfactant may be blended in the resin composition as necessary. If a dispersing agent is mix | blended, it will become possible to suppress aggregation of a light-diffusion particle | grain (C), acicular electroconductive particle (D), and a metal oxide particle (E), and to make it a uniform state. Furthermore, a solvent, a surface conditioner, etc. may be mix | blended with the resin composition. If a solvent is blended, the resin composition can be adjusted to a viscosity that allows easy coating, and if a surface conditioner is blended, the leveling property can be improved.

  For example, water or an organic solvent is preferably used as the solvent for adjusting the viscosity. The organic solvent is not particularly limited, but it is preferable to appropriately select an organic solvent that volatilizes easily at the time of coating film formation and does not cause curing inhibition at the time of coating film formation. Examples of the organic solvent include aromatic hydrocarbons (such as toluene and xylene), alcohols (such as methanol, ethanol, and isopropyl alcohol), and ketones (such as acetone, methyl ethyl ketone, and methyl isobutyl ketone). Furthermore, aliphatic hydrocarbons (such as hexane and heptane), ethers (such as tetrahydrofuran), and amide solvents (such as N, N-dimethylformamide (DMF) and dimethylacetamide (DMAc)) may be mentioned. Of these, aromatic hydrocarbons and alcohols are preferred. These organic solvents may be used individually by 1 type, and may be used in combination of 2 or more type.

  The method for applying the surface functional layer is not particularly limited, but a spray coating method, a dip coating method, a flow coating method, a spin coating method, a roll coating method, a brush coating method, a sponge coating method or the like is preferably used. can do.

  Thus, the base material on which the surface functional layer is laminated becomes a resin sheet which is a precursor of the functional resin molded product. That is, the resin sheet serves as a precursor sheet for a molded product.

  A functional resin molded product is obtained by stretching and molding this resin sheet. That is, at least a part of the resin sheet is stretched and molded. As a molding method, an appropriate method can be used. For example, the resin sheet can be formed into a predetermined shape by a thermoforming method such as vacuum forming, pressure forming, vacuum pressure forming, press forming or the like.

  The draw ratio at the time of molding is preferably 1.2 to 2 times in the biaxial direction perpendicular to the plane of the resin sheet. If the draw ratio is in this range, moldability can be maintained, and cracks and the like are less likely to occur in the surface functional layer.

  In addition, although the film thickness (application | coating film thickness) of the surface functional layer in the resin sheet state before extending | stretching molding is not specifically limited, It is preferable that it is the range of 5 micrometers-50 micrometers. When the film thickness of the surface functional layer is 5 μm or more, the film thickness after stretching is sufficient and water repellency can be maintained. On the other hand, when the film thickness of the surface functional layer is 50 μm or less, the coating film can be stretched following the base material during molding.

The functional resin molded product of this embodiment includes a transparent resin base material and a surface functional layer provided on the surface of the transparent resin base material. And the said surface functional layer contains the following (A) thru | or (D) component.
(A): Acrylic resin (B): Acrylic resin having a solid content of 5 to 100 parts by mass and a water-repellent group (C): (A ) Component and (B) light diffusing particles (D): (A) which are 25 to 80 parts by mass and the average particle size is 0.8 to 10 μm with respect to 100 parts by mass of the total solid content. 20 to 50 parts by mass of acicular conductive particles with respect to 100 parts by mass of the total solid content of the component and component (B)

  Since the functional resin molded product of the present embodiment includes the surface functional layer having the above composition, even if the surface functional layer is a single layer, excellent light transmittance, light diffusibility, antistatic property and water repellency can be obtained. Is possible. Moreover, since the resin base material in which a surface functional layer is formed is transparent, inhibiting light transmittance is suppressed.

Moreover, the other functional resin molded product of this embodiment is provided with the transparent resin base material and the surface functional layer provided in the surface of the transparent resin base material. And the said surface functional layer contains the following (A) thru | or (E) component.
(A): Acrylic resin (B): Acrylic resin having a solid content of 5 to 100 parts by mass and a water-repellent group (C): (A ) Component and (B) light diffusing particles (D): (A) which are 25 to 80 parts by mass and the average particle size is 0.8 to 10 μm with respect to 100 parts by mass of the total solid content. 5 to 20 parts by mass of the acicular conductive particles (E): 100 parts by mass of the total of the components (A) and (B) with respect to 100 parts by mass of the total solids of the component and the component (B) And 20 to 50 parts by mass of metal oxide particles having light diffusibility and conductivity

  Since the functional resin molded product of the present embodiment includes the surface functional layer having the above composition, even if the surface functional layer is a single layer, excellent light transmittance, light diffusibility, antistatic property and water repellency can be obtained. Is possible. Furthermore, since metal oxide particles are used in place of the acicular conductive particles, it is possible to further suppress the coloring of the surface functional layer by the acicular conductive particles and obtain a white functional resin molded product. is there.

  In the functional resin molded product of the present embodiment, in addition to excellent light transmission and light diffusibility, antistatic properties and water repellency are exhibited only by adding a single functional layer to the transparent resin substrate. Such antistatic properties and water repellency are exhibited even when a resin base material having a surface functional layer is stretch-molded. Therefore, such a functional resin molded product has a very high industrial value.

The functional resin molded product of this embodiment preferably has a surface resistivity of 10 ⁷ to 10 ¹³ Ω / sq on the surface functional layer side. When the surface resistivity is within this range, charging of the surface functional layer is suppressed, so that it is possible to reduce adhesion of electrostatic dirt such as dust.

  In the functional resin molded product of the present embodiment, the contact angle of water is preferably 90 ° to 120 ° on the surface functional layer side. Since the water contact angle is within this range, it has high water repellency, so that it is possible to reduce hydrophilic dirt and hydrophobic dirt such as oils.

[Lighting cover]
Although it does not specifically limit as a use of a functional resin molded product, It can be manufactured by extending | stretching the above-mentioned resin sheet, and can be applied to the use which requires water repellency and electroconductivity. For example, a semiconductor tray or a lighting cover can be used. In particular, the above-mentioned functional resin molded product uses an acrylic resin for the surface functional layer and is excellent in light resistance, and thus is suitable as a lighting cover.

  For example, the lighting cover is preferably mounted so as to cover the lamp. At this time, the light emitting unit may be entirely covered or attached, or a part of the light emitting unit may be covered. In order to make the shape covering the lamp, it is preferable to mold by pressing and stretching from the surface of the resin sheet on the base material side (the side opposite to the surface functional layer). When molded in this manner, the surface functional layer is disposed on the outer surface of the molded product.

  Moreover, it is preferable that the illumination cover is a type of cover that is milky white and is accompanied by diffusion of light, thereby softening the light from the lamp and softening the lamp image. Therefore, the lighting cover preferably has a total light transmittance of 30% or more, and more preferably has a total light transmittance of 40% or more. If the total light transmittance is 30% or more, the light from the lamp can be moderated moderately without being too dark. Moreover, it is more preferable that the light cover has a total light transmittance of 70% or less. If the total light transmittance is 70% or less, sufficient brightness can be obtained while light from the lamp can be moderated.

  Such a lighting cover can be used for various lighting fixtures. For example, it can be suitably used for a ceiling light, a pendant type light, a sink lamp, a bathroom lamp, a chandelier, a stand, a bracket, a cover of a lantern, and the like. Also for garage lights, eaves lights, gatepost lights, porch lights, garden lights, entrance lights, footlights, stair lights, guide lights, security lights, downlights, base lights, electric signs, sign lights, etc. It can be used suitably. Furthermore, it can be suitably used for a cover for a vehicular lamp such as an automobile or a motorcycle. In particular, it can be suitably used for a ceiling light or the like having a structure in which a cover is sandwiched between instrument bodies. Since the above-mentioned functional resin molded product has moderate strength and flexibility, it can be fitted into a portion sandwiched by flexibility while improving impact resistance by strength.

  FIG. 1 shows an example of a lighting fixture 10 in which the lighting cover 1 is used. The luminaire 10 is a circular ceiling light that is installed on the ceiling 4 of a house. The lighting fixture 10 includes a lamp 2 serving as a light emitter, a fixture main body 3 that holds the lamp 2 and is attached to a ceiling 4, and a lighting cover 1 formed of a functional resin molded product.

  The lighting cover 1 has a substantially C-shaped cross section and covers the lamp 2 and is attached to the fixture body 3 from below. In the illumination cover 1, a surface functional layer is disposed on the outer surface opposite to the lamp 2. At the upper end portion of the illumination cover 1, an engagement portion 11 for hooking on the instrument body 3 is provided. In the illustrated form, the engaging portion 11 is formed to protrude inward. The engaging portion 11 may be provided over the entire circumference of the lighting cover 1 or may be provided in part.

  The fixture body 3 is provided with an engaged portion 31 that engages with the engaging portion 11 of the illumination cover 1. In the illustrated form, the engaged portion 31 is formed to protrude outward. In addition, the instrument body 3 is provided with a support portion 32 that protrudes downward from a position outside the instrument body 3 relative to the engaged portion 31. The support portion 32 supports the illumination cover 1 from the outside so that the illumination cover 1 is not displaced or rattled. The engaged portion 31 and the support portion 32 may be provided over the entire circumference of the instrument body 3 or may be provided in part.

  Thus, the illumination cover 1 includes the above-described functional resin molded product. And since the outer surface is a surface functional layer, the lighting cover 1 has low surface energy properties such as water repellency and antistatic properties, and has high antifouling properties. Moreover, when the surface functional layer is formed of an acrylic resin, light resistance is improved, and suitable light transmittance is obtained.

Hereinafter, the present embodiment will be described in more detail with reference to examples , reference examples, and comparative examples, but the present embodiment is not limited to these examples.

[ Reference Example 1]
The acrylic resin (B) having a dimethylsiloxane group as a water-repellent group was added so that the solid content was 50 parts by mass with respect to 100 parts by mass of the solid content of the acrylic resin (A). In addition, acrylic resin (A) uses A-190 by DIC Corporation, and the solid content is 50 mass%. Moreover, Toagosei Co., Ltd. GS-101 is used for the acrylic resin (B) which has a dimethylsiloxane group, and the solid content is 45 mass%.

  Furthermore, it diluted with methyl ethyl ketone so that the whole non-volatile content might be 15%, and it stirred at 1000 rpm for 10 minutes with the disper (stirrer), and obtained the resin solution.

  Next, 60 parts by mass of spherical benzoguanamine-based resin particles are added as component (C) to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as the solid content as component (D). To 35 parts by mass. As the spherical benzoguanamine resin particles, “Eposter (registered trademark) MS” (benzoguanamine / formaldehyde condensate) manufactured by Nippon Shokubai Co., Ltd. was used. The spherical benzoguanamine-based resin particles have a refractive index of 1.66 and an average particle diameter of 2 μm. Further, FSS-10M manufactured by Ishihara Sangyo Co., Ltd. was used as the methyl ethyl ketone dispersion of acicular antimony-doped tin oxide. The dispersion has a solid content of 30% by mass. The acicular antimony-doped tin oxide has a major axis of 0.2 μm to 2 μm and a minor axis of 0.01 μm to 0.02 μm.

  Then, spherical benzoguanamine-based resin particles and acicular antimony-doped tin oxide methyl ethyl ketone dispersion were added to the resin solution, and then stirred at 2000 rpm for 20 minutes with a disper to obtain a paint.

  This paint was applied to the surface of the transparent acrylic resin plate so that the dry film thickness was 10 μm, and then dried. As a result, a resin sheet having a surface functional layer formed on the surface of the substrate was obtained. The acrylic resin plate was an extrusion-molded plate having a thickness of 2 mm, and Sumipex (registered trademark) E000 manufactured by Sumitomo Chemical Co., Ltd. was used. The total light transmittance of the acrylic resin plate is 92.5%.

  The obtained resin sheet was cut into a size of 650 mm × 650 mm, and molded into a glove shape of a ceiling light as shown in FIG. 1 using a vacuum molding machine to obtain a molded product of this example. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[ Reference Example 2]
The acrylic resin (B) having a perfluoroalkyl group as a water repellent group was added to 100 parts by mass of the solid content of the acrylic resin (A) so that the solid content was 50 parts by mass. In addition, acrylic resin (A) uses S-701 by DIC Corporation, and the solid content is 40 mass%. Moreover, the acrylic resin (B) which has a perfluoroalkyl group uses FS-6130 by Fluoro Technology, Inc., and the solid content is 10 mass%.

  Furthermore, the resin solution was obtained by diluting with distilled water so that the whole non-volatile content might be 15%, and stirring by 1000 rpm with a disper (stirrer) for 10 minutes.

Next, 60 parts by mass of spherical benzoguanamine-based resin particles are added as component (C) to 100 parts by mass of the solid content of the resin solution, and an aqueous dispersion of acicular antimony-doped tin oxide is added as the component (D). To 35 parts by mass. The same spherical benzoguanamine resin particles as those in Reference Example 1 were used. Moreover, Ishihara Sangyo Co., Ltd. FS-10D was used for the aqueous dispersion of acicular antimony dope tin oxide. The dispersion has a solid content of 20% by mass. The acicular antimony-doped tin oxide has a major axis of 0.2 μm to 2 μm and a minor axis of 0.01 μm to 0.02 μm.

  Then, spherical benzoguanamine-based resin particles and acicular antimony-doped tin oxide methyl ethyl ketone dispersion were added to the resin solution, and then stirred at 2000 rpm for 20 minutes with a disper to obtain a paint.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Example 3]
The acrylic resin (B) having a dimethylsiloxane group as a water-repellent group was added so that the solid content was 50 parts by mass with respect to 100 parts by mass of the solid content of the acrylic resin (A). In addition, acrylic resin (A) uses WAL-578 by DIC Corporation, and the solid content is 50 mass%. Moreover, Toagosei Co., Ltd. GS-101 is used for the acrylic resin (B) which has a dimethylsiloxane group, and the solid content is 45 mass%.

  Furthermore, it diluted with methyl ethyl ketone so that the whole non-volatile content might be 15%, and it stirred at 1000 rpm for 10 minutes with the disper (stirrer), and obtained the resin solution.

Next, 45 parts by mass of spherical benzoguanamine-based resin particles as component (C) are added to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as the solid content as component (D). So as to be 15 parts by mass. Furthermore, 35 parts by mass of aluminum-doped zinc oxide was added as the component (E) to 100 parts by mass of the solid content of the resin solution. In addition, the same thing as the reference example 1 was used for the spherical ethyl benzoguanamine type-resin particle and the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide. Moreover, the aluminum dope zinc oxide uses Pazet CK by Hakusui Tech Co., Ltd., and the solid content is 100 mass%.

  Then, after adding spherical benzoguanamine-based resin particles, acicular antimony-doped tin oxide methylethylketone dispersion and aluminum-doped zinc oxide to the resin solution, the mixture was stirred at 2000 rpm for 20 minutes with a disper to obtain a paint.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Example 4]
The acrylic resin (B) having a dimethylsiloxane group as a water-repellent group was added so that the solid content was 50 parts by mass with respect to 100 parts by mass of the solid content of the acrylic resin (A). The acrylic resin (A) and the acrylic resin (B) having a dimethylsiloxane group were the same as those in Reference Example 1.

  Furthermore, it diluted with methyl ethyl ketone so that the whole non-volatile content might be 15%, and it stirred at 1000 rpm for 10 minutes with the disper (stirrer), and obtained the resin solution.

Next, 45 parts by mass of spherical styrene resin particles are added as component (C) to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as solid component as component (D). It added so that it might become 15 mass parts. Furthermore, 35 parts by mass of gallium-doped zinc oxide was added as the component (E) to 100 parts by mass of the solid content of the resin solution. As the spherical styrene resin particles, SX-350H manufactured by Soken Chemical Co., Ltd. is used, the refractive index is 1.59, and the average particle diameter is 3.5 μm. Moreover, the same thing as the reference example 1 was used for the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide. Furthermore, as the gallium-doped zinc oxide, Pazet GK-40 manufactured by Hakusui Tech Co., Ltd. is used, and the solid content is 100 mass%.

  Then, after adding spherical benzoguanamine-based resin particles, acicular antimony-doped tin oxide methylethylketone dispersion and gallium-doped zinc oxide to the resin solution, the mixture was stirred at 2000 rpm for 20 minutes with a disper to obtain a paint.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[ Reference Example 5]
Reference examples except that acrylic resin (A), acrylic resin having dimethylsiloxane group (B), spherical benzoguanamine resin particles (C), and acicular antimony-doped tin oxide (D) were changed to the values shown in Table 2. In the same manner as in Example 1, a molded product of this example was obtained.

[ Reference Example 6]
The acrylic resin (B) having a dimethylsiloxane group as a water repellent group was added to 100 parts by mass of the solid content of the acrylic resin (A) so that the solid content was 100 parts by mass. The acrylic resin (A) and the acrylic resin (B) having a dimethylsiloxane group were the same as those in Reference Example 1.

  Furthermore, it diluted with methyl ethyl ketone so that the whole non-volatile content might be 15%, and it stirred at 1000 rpm for 10 minutes with the disper (stirrer), and obtained the resin solution.

Next, 80 parts by mass of spherical silicone resin particles are added as component (C) to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as solid component as component (D). It added so that it might become 50 mass parts. The spherical silicone resin particles use Tospearl (registered trademark) 120 manufactured by Momentive Performance Materials, the refractive index is 1.42, and the average particle diameter is 2 μm. Moreover, the same thing as the reference example 1 was used for the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide.

  And after adding spherical silicone resin particle | grains and the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide to a resin solution, the coating material was obtained by stirring at 2000 rpm for 20 minutes with a disper.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Example 7]
The acrylic resin (A), acrylic resin (B) having a dimethylsiloxane group, spherical benzoguanamine-based resin particles (C), acicular antimony-doped tin oxide (D), and aluminum-doped zinc oxide were changed to the values shown in Table 2. Except this, the procedure was the same as in Example 3. Thereby, the molded product of this example was obtained.

[Example 8]
The acrylic resin (B) having a dimethylsiloxane group as a water repellent group was added to 100 parts by mass of the solid content of the acrylic resin (A) so that the solid content was 100 parts by mass. In addition, the same thing as Example 3 was used for the acrylic resin (A) and the acrylic resin (B) which has a dimethylsiloxane group.

  Furthermore, it diluted with methyl ethyl ketone so that the whole non-volatile content might be 15%, and it stirred at 1000 rpm for 10 minutes with the disper (stirrer), and obtained the resin solution.

Next, 60 parts by mass of spherical silicone resin particles as a component (C) are added to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as a solid component as a component (D). It added so that it might become 20 mass parts. Furthermore, 50 mass parts of aluminum dope zinc oxide was added as (E) component with respect to 100 mass parts of solid content of a resin solution. The same spherical silicone resin particles as in Reference Example 6 were used. Moreover, the same thing as the reference example 1 was used for the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide. Further, the same aluminum-doped zinc oxide as in Example 3 was used.

  And after adding spherical silicone resin particle | grains, the acicular antimony dope tin oxide methyl ethyl ketone dispersion, and aluminum dope zinc oxide to the resin solution, it stirred at 2000 rpm for 20 minutes with the disper, and the coating material was obtained.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Example 9]
The acrylic resin (B) having a dimethylsiloxane group as a water-repellent group was added so that the solid content was 50 parts by mass with respect to 100 parts by mass of the solid content of the acrylic resin (A). In addition, the same thing as Example 3 was used for the acrylic resin (A) and the acrylic resin (B) which has a dimethylsiloxane group.

  Furthermore, it diluted with methyl ethyl ketone so that the whole non-volatile content might be 15%, and it stirred at 1000 rpm for 10 minutes with the disper (stirrer), and obtained the resin solution.

Next, 45 parts by mass of spherical benzoguanamine-based resin particles as component (C) are added to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as the solid content as component (D). So as to be 10 parts by mass. Furthermore, 20 mass parts of scaly aluminum dope zinc oxide was added as (E) component with respect to 100 mass parts of solid content of a resin solution. In addition, the same thing as the reference example 1 was used for the spherical ethyl benzoguanamine type-resin particle and the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide. Moreover, scale-like aluminum dope zinc oxide uses Paket CK-K by Hakusui Tech Co., Ltd., and the solid content is 100 mass%.

  Then, after adding spherical benzoguanamine-based resin particles, acicular antimony-doped tin oxide methylethylketone dispersion, and scaly aluminum-doped zinc oxide to the resin solution, stirring was performed at 2000 rpm for 20 minutes with a disper to obtain a paint. .

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Comparative Example 1]
Reference example except that acrylic resin (A), acrylic resin having dimethylsiloxane group (B), spherical benzoguanamine resin particles (C), and acicular antimony-doped tin oxide (D) were changed to the values shown in Table 3. In the same manner as in Example 1, a molded product of this example was obtained.

[Comparative Example 2]
Reference example except that acrylic resin (A), acrylic resin having dimethylsiloxane group (B), spherical benzoguanamine resin particles (C), and acicular antimony-doped tin oxide (D) were changed to the values shown in Table 3. In the same manner as in Example 1, a molded product of this example was obtained.

[Comparative Example 3]
The acrylic resin (B) having a perfluoroalkyl group as a water repellent group was added to 100 parts by mass of the solid content of the acrylic resin (A) so that the solid content was 150 parts by mass. In addition, the same thing as the reference example 2 was used for the acrylic resin (A) and the acrylic resin (B) which has a perfluoroalkyl group.

  Furthermore, the resin solution was obtained by stirring for 10 minutes at 1000 rpm with a disper (stirrer).

Next, 60 parts by mass of spherical silicone resin particles as a component (C) are added to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as a solid component as a component (D). It added so that it might become 35 mass parts. The spherical silicone resin particles and the acicular antimony-doped tin oxide methyl ethyl ketone dispersion were the same as in Reference Example 6.

  And after adding spherical silicone resin particle | grains and the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide to a resin solution, the coating material was obtained by stirring at 2000 rpm for 20 minutes with a disper.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Comparative Example 4]
The acrylic resin (B) having a perfluoroalkyl group as a water repellent group was added to 100 parts by mass of the solid content of the acrylic resin (A) so that the solid content was 50 parts by mass. In addition, the same thing as the reference example 2 was used for the acrylic resin (A) and the acrylic resin (B) which has a perfluoroalkyl group.

  Furthermore, the resin solution was obtained by diluting with distilled water so that the whole non-volatile content might be 15%, and stirring by 1000 rpm with a disper (stirrer) for 10 minutes.

Next, 60 parts by mass of spherical benzoguanamine-based resin particles are added as component (C) to 100 parts by mass of the solid content of the resin solution, and an aqueous dispersion of spherical antimony-doped tin oxide is added as solids as component (D). It added so that it might become 35 mass parts. The same spherical benzoguanamine resin particles as those in Reference Example 1 were used. Moreover, Ishihara Sangyo Co., Ltd. FN-100D was used for the aqueous dispersion of spherical antimony-doped tin oxide. The dispersion has a solid content of 30% by mass. The aqueous dispersion of spherical antimony-doped tin oxide has a particle size of 0.01 μm to 0.1 μm.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Comparative Example 5]
The acrylic resin (B) having a dimethylsiloxane group as a water-repellent group was added so that the solid content was 50 parts by mass with respect to 100 parts by mass of the solid content of the acrylic resin (A). The acrylic resin (A) and the acrylic resin (B) having a dimethylsiloxane group were the same as those in Reference Example 1.

  Furthermore, it diluted with methyl ethyl ketone so that the whole non-volatile content might be 15%, and it stirred at 1000 rpm for 10 minutes with the disper (stirrer), and obtained the resin solution.

Next, 60 parts by mass of aluminum oxide particles as a component (C) is added to 100 parts by mass of the solid content of the resin solution, and a methyl ethyl ketone dispersion of acicular antimony-doped tin oxide is added as a component (D) to 35 It added so that it might become a mass part. The aluminum oxide particles are manufactured by Nippon Light Metal Co., Ltd., the refractive index is 1.76, and the average particle diameter is 12 μm. Moreover, the same thing as the reference example 1 was used for the methyl ethyl ketone dispersion liquid of acicular antimony dope tin oxide.

  Then, after adding aluminum oxide particles and a dispersion of acicular antimony-doped tin oxide in methyl ethyl ketone to the resin solution, the resultant was stirred with a disper at 2000 rpm for 20 minutes to obtain a paint.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Comparative Example 6]
The acrylic resin (B) having a perfluoroalkyl group as a water repellent group was added to 100 parts by mass of the solid content of the acrylic resin (A) so that the solid content was 50 parts by mass. In addition, the same thing as the reference example 2 was used for the acrylic resin (A) and the acrylic resin (B) which has a perfluoroalkyl group.

  Furthermore, the resin solution was obtained by diluting with distilled water so that the whole non-volatile content might be 15%, and stirring by 1000 rpm with a disper (stirrer) for 10 minutes.

Next, an aqueous dispersion of spherical acrylic resin particles is added as component (C) to 60 parts by mass with respect to 100 parts by mass of the solid content of the resin solution, and needle-like as component (D). An aqueous dispersion of antimony-doped tin oxide was added to a solid content of 35 parts by mass. The aqueous dispersion of spherical acrylic resin particles uses F-167 manufactured by Toyobo Co., Ltd., its solid content is 27 parts by mass, and its average particle size is 0.3 μm. The aqueous dispersion of acicular antimony-doped tin oxide was the same as in Reference Example 2.

  And after adding spherical acrylic resin particle and the methyl ethyl ketone dispersion of acicular antimony dope tin oxide to the resin solution, it stirred at 2000 rpm for 20 minutes with the disper, and the coating material was obtained.

As in Reference Example 1, this paint was applied to the surface of the transparent acrylic resin plate and then dried to obtain a resin sheet. Furthermore, the molded product of this example was obtained by molding in the same manner as in Reference Example 1. In addition, the draw ratio at the time of shape | molding from a resin sheet to a glove | globe shape was 1.5 times x 1.5 times on the average in the biaxial direction orthogonal to a plane.

[Comparative Example 7]
Values shown in Table 3 for acrylic resin (A), acrylic resin (B) having a dimethylsiloxane group, spherical benzoguanamine-based resin particles (C), acicular antimony-doped tin oxide (D), and aluminum-doped zinc oxide (E) Changed to Other than that was carried out similarly to Example 7, and obtained the molded article of this example.

[Comparative Example 8]
Values shown in Table 3 for acrylic resin (A), acrylic resin (B) having a dimethylsiloxane group, spherical benzoguanamine-based resin particles (C), acicular antimony-doped tin oxide (D), and aluminum-doped zinc oxide (E) Changed to Other than that was carried out similarly to Example 7, and obtained the molded article of this example.

[Comparative Example 9]
(D) The molded article of this example was obtained in the same manner as in Example 3 except that the acicular antimony-doped tin oxide as a component was not added.

  Tables 2 and 3 show the materials and addition amounts of the components (A) to (E) in each example.

[Evaluation]
For the molded products (lighting covers) obtained in Reference Examples 1, 2, 5 and 6, Examples 3, 4 and 7 to 9, and Comparative Examples 1 to 9, the following items were evaluated.

[Light transmission evaluation]
Using a haze meter (NDH 2000 manufactured by Nippon Denshoku Industries Co., Ltd.), the total light transmittance of the molded product of each example was measured. If the total light transmittance is 60% or more, and there is light uniformity and there is no lamp image, it can be said that both excellent instrument efficiency and light uniformity can be achieved.
Therefore, the following criteria were used.
・ Criteria 65% or more: ◎
60-65%: ○
Less than 60%: ×

[Evaluation of light diffusion]
Using the fixture body of LED ceiling light HH-LC626A manufactured by Panasonic Corporation, the ability to erase the lamp image of each molded product (lighting cover) was confirmed by visual observation.
-Criteria A: The light source shape cannot be confirmed, and the light is uniform.
○: Although the shape of the light source cannot be confirmed, the portion immediately below the light source is bright and the central portion at a distance from the light source is dark.
X: The light source shape can be confirmed.

[Water contact angle evaluation]
The contact angle when water was dropped on the surface of each molded product was measured with a contact angle meter (DM500) manufactured by Kyowa Interface Science Co., Ltd.
・ Criteria 90 ° or more: ○
Less than 90 °: ×

[Evaluation of antistatic properties]
It was measured at an applied voltage of 100 V using a surface resistance measuring instrument (Hiresta (registered trademark) UP MCP-HT450 type) manufactured by Mitsubishi Chemical Analytech Co., Ltd. This surface resistance value is a value based on JIS K6911-1995. Since the measurement range of the apparatus is from the 4th power to the 14th power, those exceeding the 14th power are described as “OR” which means an overrange.
・ Criteria smaller than 1 × 10 ¹⁴ Ω / sq: ○
1 × 10 ¹⁴ Ω / sq or more: ×

[Appearance color evaluation]
Judgment as to whether or not the appearance color of the molded product of each example has a quality as a lighting cover was evaluated by a Δb value based on the lighting cover attached to the LED ceiling light HH-LC626A manufactured by Panasonic Corporation. The reason why the b value is evaluated is that when the (D) component and the (E) component are blended, these powders exhibit a dark blue color, so that the difference in the b value is larger than the difference in the L value and the a value. This is because it was proved by experiments.

  Here, the L value, the a value, and the b value are values indicating the color tone represented by the Lab color system, the L value indicates lightness, the a value is + for red, and-for green. The b value indicates a tendency of yellowish with + and a tendency of blue with-. For example, if (b value of the molded product) − (b value of the attached lighting cover) = − 2.5, it means that the molded product has a stronger bluish tint than the attached cover.

If Δb is closer to zero than −3, there is no problem in the appearance as a lighting cover, so the following determination criteria were used.
・ Criteria 0 ≧ Δb> −2: ◎
-2 ≧ Δb> -3: ○
Δb ≦ −3: ×

[Evaluation of coating uniformity]
The uniformity of the coating film (surface functional layer) was visually evaluated. A uniform material was designated as A, and non-uniform material was designated as X.

[result]
The evaluation results for each example are shown in Table 4.

As shown in Table 4, Reference Examples 1, 2, 5 and 6 comprising the components (A) to (D) and Examples 3, 4 and 7 to 9 comprising the components (A) to (E) Good results were shown in the evaluation. On the other hand, in Comparative Example 1, the total light transmittance and appearance color were insufficient because the addition amount of antimony-doped tin oxide, which is the cause of coloring and transmittance reduction, exceeded the upper limit. In Comparative Example 2, since the addition amount of the component (B), the component (C) and the component (D) was below the lower limit, the light diffusibility, water repellency and antistatic property were insufficient. In Comparative Example 3, since the amount of the component (B) exceeds the upper limit, the leveling property of the paint is poor and the paint is difficult to handle. Therefore, uniform application to the substrate is difficult and the film uniformity is insufficient. there were.

  In Comparative Example 4, since the conductive particles of component (D) were spherical rather than needle-shaped, a conductive path could not be secured after stretching, and the antistatic property was insufficient. In Comparative Example 5, since the average particle diameter of the component (C) exceeds 10 μm and the refractive index difference from the component (A) is higher than 0.2, the total light transmittance is insufficient. In Comparative Example 6, the average particle size of the component (C) was less than 0.8 μm, and the difference in refractive index from the component (A) was less than 0.05, so that the light diffusibility was insufficient.

  In Comparative Example 7, since the addition amount of the component (E) exceeded the upper limit, the light transmittance was adversely affected. As a result, the total light transmittance was insufficient. In Comparative Example 8, since the amount of component (E) added was below the lower limit, the antistatic property was insufficient. In Comparative Example 9, the component (D) was not used, and the component (E) alone was intended to exhibit antistatic properties. However, the conductive path after stretching could not be secured, and the antistatic properties were insufficient. .

  As described above, the contents of the present embodiment have been described according to the examples. However, the present embodiment is not limited to these descriptions, and it is obvious to those skilled in the art that various modifications and improvements are possible. is there.

  1 Lighting cover

Claims (9)

A transparent resin substrate;
A surface functional layer provided on the surface of the transparent resin substrate,
The surface functional layer is a functional resin molded product containing the following components (A) to (E).
(A): Acrylic resin (B): The dimethylsiloxane group and the fluoroalkyl group represented by Formula 1 having a solid content of 5 to 100 parts by mass with respect to the solid content of 100 parts by mass of the component (A) And acrylic resin having at least one water repellent group selected from the group consisting of fluoroalkylene groups (C): 25 to 80 with respect to 100 parts by mass of the total solid content of the components (A) and (B) Light diffusing particles (D) having an average particle diameter of 0.8 to 10 μm and 5 parts by mass to 100 parts by mass of the total solid content of the components (A) and (B). Mass parts of acicular conductive particles (E): 20 to 50 parts by mass with respect to 100 parts by mass of the total solid content of the components (A) and (B), and light diffusibility and conductivity Spherical or scaly metal oxide particles having

(N represents an integer of 1 or more) The component (C), component (A) and (B) functional resin molded article according the solid content 100 parts by weight of the sum of components to claim 1 which is 30 to 60 parts by weight. The component (C) of the light diffusing particles, wherein (A) the refractive index difference between the component functional resin molded article according a to claim 1 or 2, 0.05 to 0.2. The functional resin molded product according to any one of claims 1 to 3 , wherein the component (C) is spherical benzoguanamine-based resin particles. The component (D), needle-like functional resin molded article according to any one of claims 1 to 4 which is a conductive metal oxide. The functional resin molded product according to claim 5 , wherein the component (D) is antimony-doped tin oxide. The functional resin molded product according to claim 1 , wherein the component (E) is at least one of gallium-doped zinc oxide and aluminum-doped zinc oxide. In the surface functional layer side, a surface resistivity of ¹⁰ 7 ^{~10 13 Ω} / sq, functional resin according to any one of claims 1 to 7 contact angle of water is 90 ° to 120 ° Molded product. An illumination cover provided with the functional resin molded product according to any one of claims 1 to 8 .

Images