JP6489616B2 - Light diffuser for LED lighting cover and use thereof - Google Patents
Light diffuser for LED lighting cover and use thereof Download PDFInfo
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Description
本発明は、ＬＥＤ（発光ダイオード）光源を備えるＬＥＤ照明（例えば、ＬＥＤ電球（電球型ＬＥＤ照明）、直管型ＬＥＤ照明、ＬＥＤデスクスタンド（ＬＥＤデスクスタンドライト）、ＬＥＤシーリングライト等）を囲むＬＥＤ照明カバーに使用され、ＬＥＤ光源からの光を拡散させるＬＥＤ照明カバー用光拡散体及びその用途（ＬＥＤ照明装置）に関するものである。 The present invention relates to LED surrounding LED lighting (for example, LED bulb (bulb-type LED lighting), straight tube LED lighting, LED desk stand (LED desk stand light), LED ceiling light, etc.) provided with an LED (light emitting diode) light source. The present invention relates to a light diffuser for an LED illumination cover that is used for an illumination cover and diffuses light from an LED light source, and an application thereof (LED illumination device).
近年、照明分野では、電力料金の高騰により、省電力化など効率化が求められており、急速にＬＥＤ光源を使用した照明装置（ＬＥＤ照明装置）が普及している。 In recent years, in the lighting field, efficiency such as power saving has been demanded due to soaring power charges, and lighting devices (LED lighting devices) using LED light sources are rapidly spreading.
ＬＥＤ光源は指向性が強いため、ＬＥＤ光源を備えるＬＥＤ照明には、眩しさの低減などの目的で、ＬＥＤ光源を囲むＬＥＤ照明カバーとして、ＬＥＤ光源からの光を拡散させる光拡散機能を有する半透明のＬＥＤ照明カバー用光拡散体が用いられている。 Since the LED light source has strong directivity, the LED illumination including the LED light source has a light diffusion function for diffusing light from the LED light source as an LED illumination cover surrounding the LED light source for the purpose of reducing glare or the like. A transparent light diffuser for LED lighting cover is used.
従来、ＬＥＤ照明カバー用光拡散体としては、アクリル系樹脂やポリカーボネート系樹脂等の透明な熱可塑性樹脂に対して、炭酸カルシウム粒子、硫酸バリウム粒子等の透明無機粒子、又は架橋アクリル系樹脂粒子、架橋アクリル−スチレン共重合体粒子、ポリスチレン系粒子等の透明樹脂粒子が配合されたＬＥＤ照明カバー用光拡散体が知られている（例えば、特許文献１）。 Conventionally, as a light diffuser for LED lighting cover, transparent inorganic particles such as calcium carbonate particles and barium sulfate particles, or crosslinked acrylic resin particles, for transparent thermoplastic resins such as acrylic resins and polycarbonate resins, There is known a light diffuser for LED lighting covers in which transparent resin particles such as crosslinked acrylic-styrene copolymer particles and polystyrene-based particles are blended (for example, Patent Document 1).
昆虫は、一般に３００〜５００ｎｍの範囲の波長領域の光を出射する光源に向かって進む走光性という習性を有するため、昆虫が、その波長領域の光を出射するＬＥＤ照明装置に誘引されることがある。屋内、特に食品工場内においては、ＬＥＤ照明装置に誘引された昆虫は、非衛生的である。近年、照明装置に誘引される昆虫を低減するために、昆虫を誘引しにくい低誘虫性を有する照明装置（低誘虫照明装置）が求められるようになっている。また、感光性材料を扱う半導体素子工場に使用される工場照明装置には、感光性材料が感光しやすい５００ｎｍ以下の波長の光の出射を抑制することが要求される。 Insects generally have the habit of traveling light toward a light source that emits light in a wavelength region in the range of 300 to 500 nm. Therefore, insects may be attracted to LED lighting devices that emit light in that wavelength region. is there. Indoors, especially in food factories, insects attracted by LED lighting devices are unsanitary. In recent years, in order to reduce insects attracted by lighting devices, there is a need for lighting devices (low insect lighting devices) having a low insect attracting property that are difficult to attract insects. In addition, factory lighting devices used in semiconductor element factories that handle photosensitive materials are required to suppress the emission of light with a wavelength of 500 nm or less, at which photosensitive materials are easily exposed.
本願発明は、上記の課題に鑑みなされたものであり、その目的は、出射光に含まれる３００〜５００ｎｍの波長領域の光を低減することができ、屋外の果樹園、花木畑、菜園、食品工場等で使用される低誘虫照明装置や、半導体素子工場、特に感光性材料を扱う半導体素子工場内で使用される工場照明装置として好適なＬＥＤ照明装置、及びそのＬＥＤ照明装置の照明カバーとして用いられるＬＥＤ照明カバー用光拡散体を提供することにある。 This invention is made | formed in view of said subject, The objective can reduce the light of the wavelength range of 300-500 nm contained in emitted light, an outdoor orchard, flower garden, vegetable garden, foodstuff LED lighting device suitable as a low worm lighting device used in factories, semiconductor device factories, especially factory lighting devices used in semiconductor element factories handling photosensitive materials, and used as a lighting cover for the LED lighting device An object of the present invention is to provide a light diffuser for an LED lighting cover.
本発明のＬＥＤ照明カバー用光拡散体は、前記の課題を解決するために、基材樹脂と、光拡散剤と、３００〜５００ｎｍの波長領域の光の少なくとも一部をカットする色素とを含むことを特徴としている。 In order to solve the above-described problems, the light diffusing body for an LED lighting cover according to the present invention includes a base resin, a light diffusing agent, and a pigment that cuts at least part of light in a wavelength region of 300 to 500 nm. It is characterized by that.
本発明のＬＥＤ照明カバー用光拡散体は、３００〜５００ｎｍの波長領域の光の少なくとも一部をカットする色素を含んでいるので、ＬＥＤ照明装置に使用したときに、ＬＥＤ照明装置からの出射光に含まれる３００〜５００ｎｍの波長領域の光を低減することができる。したがって、本発明のＬＥＤ照明カバー用光拡散体は、屋外の果樹園、花木畑、菜園、食品工場等で使用される低誘虫照明装置や、半導体素子工場、特に感光性材料を扱う半導体素子工場内で使用される工場照明装置（ＬＥＤ照明装置）のＬＥＤ照明カバーに用いられるＬＥＤ照明カバー用光拡散体として好適である。 The light diffusing body for LED lighting cover of the present invention contains a pigment that cuts at least part of light in the wavelength region of 300 to 500 nm. Therefore, when used in an LED lighting device, the emitted light from the LED lighting device. It is possible to reduce the light in the wavelength region of 300 to 500 nm contained in. Therefore, the light diffuser for LED lighting cover of the present invention is a low worm lighting device used in outdoor orchards, flower gardens, vegetable gardens, food factories, etc., semiconductor element factories, particularly semiconductor element factories that handle photosensitive materials It is suitable as a light diffusing body for an LED lighting cover used for an LED lighting cover of a factory lighting device (LED lighting device) used in the interior.
また、本発明のＬＥＤ照明カバー用光拡散体は、光拡散剤を含むので、ＬＥＤ光源からの光を拡散させることができ、その結果として、ＬＥＤ照明装置に使用したときに、ＬＥＤ光源（例えばＬＥＤチップ）の粒感を低減又は消失させると共に眩しさを低減させたＬＥＤ照明装置を実現することができる。 Moreover, since the light diffusing body for LED lighting cover of this invention contains a light diffusing agent, it can diffuse the light from an LED light source, As a result, when used for an LED lighting device, an LED light source (for example, It is possible to realize an LED lighting device that reduces or eliminates the graininess of the LED chip) and reduces glare.
本発明のＬＥＤ照明装置は、前記の課題を解決するために、前記の本発明のＬＥＤ照明カバー用光拡散体を備えることを特徴としている。 In order to solve the above-described problems, an LED lighting device of the present invention includes the above-described light diffuser for an LED lighting cover of the present invention.
本発明のＬＥＤ照明装置は、前記の本発明のＬＥＤ照明カバー用光拡散体を備えるので、出射光に含まれる３００〜５００ｎｍの波長領域の光を低減することができる。したがって、本発明のＬＥＤ照明装置は、屋外の果樹園、花木畑、菜園、食品工場等で使用される低誘虫照明装置や、半導体素子工場、特に感光性材料を扱う半導体素子工場内で使用される工場照明装置として好適である。 Since the LED illumination device of the present invention includes the light diffuser for an LED illumination cover of the present invention, light in a wavelength region of 300 to 500 nm included in the emitted light can be reduced. Therefore, the LED lighting device of the present invention is used in low worm lighting devices used in outdoor orchards, flower gardens, vegetable gardens, food factories, etc., and semiconductor element factories, particularly semiconductor element factories that handle photosensitive materials. It is suitable as a factory lighting device.
また、本発明のＬＥＤ照明装置は、前記の本発明のＬＥＤ照明カバー用光拡散体を備えるので、ＬＥＤ光源（例えばＬＥＤチップ）の粒感を低減又は消失させると共に眩しさを低減させることができる。 Moreover, since the LED illumination device of the present invention includes the light diffuser for an LED illumination cover of the present invention, it is possible to reduce or eliminate the graininess of the LED light source (for example, LED chip) and reduce glare. .
本発明によれば、出射光に含まれる３００〜５００ｎｍの波長領域の光を低減することができ、屋外の果樹園、花木畑、菜園、食品工場等で使用される低誘虫照明装置や、半導体素子工場、特に感光性材料を扱う半導体素子工場内で使用される工場照明装置として好適なＬＥＤ照明装置、及びそのＬＥＤ照明装置の照明カバーとして用いられるＬＥＤ照明カバー用光拡散体を提供できる。 According to the present invention, it is possible to reduce light in a wavelength region of 300 to 500 nm contained in emitted light, and a low worm lighting device or semiconductor used in outdoor orchards, flower gardens, vegetable gardens, food factories, etc. It is possible to provide an LED lighting device suitable as a factory lighting device used in a device factory, particularly a semiconductor device factory handling a photosensitive material, and a light diffuser for an LED lighting cover used as a lighting cover of the LED lighting device.
以下、本発明について詳細に説明する。 Hereinafter, the present invention will be described in detail.
〔ＬＥＤ照明カバー用光拡散体〕
本発明のＬＥＤ照明カバー用光拡散体は、基材樹脂と、光拡散剤と、３００〜５００ｎｍの波長領域の光の少なくとも一部をカットする色素とを含むものである。
[Light diffuser for LED lighting cover]
The light diffusing body for LED lighting cover of this invention contains base-material resin, a light-diffusion agent, and the pigment | dye which cuts at least one part of the light of a 300-500 nm wavelength range.
本発明のＬＥＤ照明カバー用光拡散体は、厚さ１ｍｍの板状体に成形されたときに、波長３００〜５００ｎｍの平均光透過率が５％以下であり、かつ波長６００〜８００ｎｍの平均光透過率が２０％以上７０％以下であることが好ましい。厚さ１ｍｍの板状体に成形されたときに、波長３００〜５００ｎｍの平均光透過率が５％以下であることで、３００〜５００ｎｍの波長領域の光をより効果的に低減することができる。厚さ１ｍｍの板状体に成形されたときに、波長６００〜８００ｎｍの平均光透過率が２０％以上であることで、前記ＬＥＤ照明カバー用光拡散体の光透過性を良好にすることができる。厚さ１ｍｍの板状体に成形されたときに、波長６００〜８００ｎｍの平均光透過率が７０％以下であることで、ＬＥＤチップが目立ちにくくなる。また、本発明のＬＥＤ照明カバー用光拡散体は、３００〜８００ｎｍの波長領域における光透過率のピークの波長が６００〜８００ｎｍの範囲内であることが好ましい。 When the light diffusing body for LED lighting cover of the present invention is formed into a plate having a thickness of 1 mm, the average light transmittance at a wavelength of 300 to 500 nm is 5% or less and the average light at a wavelength of 600 to 800 nm is used. The transmittance is preferably 20% or more and 70% or less. When it is formed into a plate having a thickness of 1 mm, the average light transmittance at a wavelength of 300 to 500 nm is 5% or less, so that light in the wavelength region of 300 to 500 nm can be more effectively reduced. . When formed into a plate having a thickness of 1 mm, the light transmittance of the light diffuser for LED lighting cover can be improved by having an average light transmittance of a wavelength of 600 to 800 nm of 20% or more. it can. When formed into a 1 mm-thick plate-like body, the LED chip is less noticeable because the average light transmittance at a wavelength of 600 to 800 nm is 70% or less. Moreover, it is preferable that the light diffuser for LED lighting covers of this invention has the peak wavelength of the light transmittance in the wavelength range of 300-800 nm in the range of 600-800 nm.
本発明のＬＥＤ照明カバー用光拡散体は、前記ＬＥＤ照明カバー用光拡散体に対してその法線方向から光を当てたときに、光透過率が直進光透過率の５０％になる透過角として定義される分散度が４０°以上であることが好ましい。これにより、前記ＬＥＤ照明カバー用光拡散体の光拡散性をより高めることができる。 The light diffuser for LED lighting cover of the present invention has a transmission angle at which the light transmittance is 50% of the straight light transmittance when light is applied to the light diffuser for LED lighting cover from the normal direction. The degree of dispersion defined as is preferably 40 ° or more. Thereby, the light diffusibility of the said light diffuser for LED illumination covers can be improved more.
前記ＬＥＤ照明カバー用光拡散体は、本発明の効果を発現する条件であれば、その形状及び厚みに特に制限はないが、０．５〜３ｍｍの範囲内の厚みを有する光拡散板（板状のＬＥＤ照明カバー用光拡散体）であることが好ましい。ＬＥＤ照明装置の軽量化が望まれていることから、前記光拡散板の厚み（板厚）は０．７〜２ｍｍの範囲内であることがより好ましい。 The light diffuser for the LED lighting cover is not particularly limited in shape and thickness as long as the effect of the present invention is exhibited, but a light diffusion plate (plate) having a thickness in the range of 0.5 to 3 mm. It is preferable that it is a light diffuser for LED lighting covers. Since it is desired to reduce the weight of the LED lighting device, the thickness (plate thickness) of the light diffusing plate is more preferably within a range of 0.7 to 2 mm.
前記ＬＥＤ照明カバー用光拡散体の大きさ及び形状は、特に制限されず、例えば、ＬＥＤ電球、直管型ＬＥＤ照明、ＬＥＤデスクスタンド、ＬＥＤシーリングライト等のＬＥＤ照明装置の発光部（ＬＥＤ照明カバー以外の部分）の大きさ及び形状に合わせればよい。 The size and shape of the light diffuser for the LED lighting cover are not particularly limited. For example, a light emitting unit (LED lighting cover) of an LED lighting device such as an LED bulb, a straight tube type LED lighting, an LED desk stand, or an LED ceiling light. The size and shape of the other portion may be adjusted.
前記ＬＥＤ照明カバー用光拡散体は、蛍光管型ＬＥＤ照明装置に使用される円筒形状又は部分円筒形状のＬＥＤ照明カバー用光拡散体であってもよく、電球形状のＬＥＤ照明カバー用光拡散体であってもよい。 The light diffusing body for LED lighting cover may be a light diffusing body for LED lighting cover having a cylindrical shape or a partial cylindrical shape used in a fluorescent tube type LED lighting device, and a light diffusing body for LED lighting cover having a bulb shape. It may be.
なお、電球形状のＬＥＤ照明カバー用光拡散体とは、シェードと組み合わせて使用される半球形状のＬＥＤ照明カバー用光拡散体、裸電球として用いられる洋梨形状のＬＥＤ照明カバー用光拡散体、シャンデリア電球として用いられる蝋燭の炎の形に類似した形状のＬＥＤ照明カバー用光拡散体、又はこれらに類似の形状のＬＥＤ照明カバー用光拡散体である。 In addition, the light diffuser for the LED lighting cover in the shape of a light bulb is a light diffuser for a hemispherical LED lighting cover used in combination with a shade, a light diffuser for a pear-shaped LED lighting cover used as a bare light bulb, a chandelier A light diffuser for an LED lighting cover having a shape similar to the shape of a candle flame used as a light bulb, or a light diffuser for an LED lighting cover having a shape similar to these.
また、円筒形状又は部分円筒形状のＬＥＤ照明カバー用光拡散体とは、円柱形状のＬＥＤ照明装置をＬＥＤ照明装置本体と共に構成する円筒形状のＬＥＤ照明カバー用光拡散体、円柱形状のＬＥＤ照明装置を半円筒形状のＬＥＤ照明装置本体と共に構成する半円筒形状のＬＥＤ照明カバー用光拡散体などである。 Moreover, the light diffuser for LED illumination covers having a cylindrical shape or a partial cylindrical shape is a light diffuser for a cylindrical LED illumination cover that forms a columnar LED illumination device together with the LED illumination device body, and a columnar LED illumination device Is a semi-cylindrical LED illuminating light diffuser for the LED lighting device main body.
〔色素〕
前記色素は、３００〜５００ｎｍの波長領域の光の少なくとも一部をカットする特性を有するものであるものであればよいが、紫外可視吸収スペクトル（波長３００〜８００ｎｍの紫外可視吸収スペクトル）の最大吸収波長を３８０〜５００ｎｍの範囲内に有する色素を含んでいることが好ましい。これにより、３００〜５００ｎｍの波長領域の光をより効果的に低減することができる。
[Dye]
Although the said pigment | dye should just have a characteristic which cuts at least one part of the light of the wavelength range of 300-500 nm, the maximum absorption of an ultraviolet visible absorption spectrum (UV-visible absorption spectrum of wavelength 300-800 nm) is sufficient. It preferably contains a dye having a wavelength in the range of 380 to 500 nm. Thereby, the light of the wavelength range of 300-500 nm can be reduced more effectively.
前記色素の紫外可視吸収スペクトルは、以下の測定方法を用いて測定できる。前記色素が可溶な溶媒１００重量部に対して前記色素を０．００１重量部添加して、前記色素を前記溶媒に溶解させ、色素の溶液を得る。得られた色素の溶液について、分光光度計（商品名「日立分光光度計Ｕ−３９００」、株式会社日立ハイテクノロジーズ）にて波長３００〜８００ｎｍの紫外可視吸収スペクトルの測定を行う。なお、前記色素の溶液の測定を行う前に、色素の溶解に用いた溶媒について前記分光光度計にて波長３００〜８００ｎｍの紫外可視吸収スペクトルの測定を行うことによりベースラインを構築する。 The ultraviolet-visible absorption spectrum of the dye can be measured using the following measurement method. 0.001 part by weight of the dye is added to 100 parts by weight of the solvent in which the dye is soluble, and the dye is dissolved in the solvent to obtain a dye solution. About the obtained pigment | dye solution, the ultraviolet visible absorption spectrum of wavelength 300-800 nm is measured with a spectrophotometer (brand name "Hitachi spectrophotometer U-3900", Hitachi High-Technologies Corporation). Before measuring the solution of the dye, a baseline is constructed by measuring an ultraviolet-visible absorption spectrum having a wavelength of 300 to 800 nm with the spectrophotometer for the solvent used for dissolving the dye.
前記色素としては、例えば、Ｃ．Ｉ．ソルベントイエロー９３、「ＯＩＬ ＹＥＬＬＯＷ １８６」、Ｃ．Ｉ．ソルベントイエロー１６、Ｃ．Ｉ．ソルベントイエロー３３、Ｃ．Ｉ．ソルベントイエロー７９、Ｃ．Ｉ．ソルベントイエロー８２（例えば、オリヱント化学工業株式会社製の「ＶＡＬＩＦＡＳＴ（登録商標） ＹＥＬＬＯＷ ４１２０」）等の黄色色素；Ｃ．Ｉ．ソルベントオレンジ６０、Ｃ．Ｉ．ソルベントオレンジ８０、Ｃ．Ｉ．ソルベントオレンジ４５（例えば、オリヱント化学工業株式会社製の「ＶＡＬＩＦＡＳＴ（登録商標） ＹＥＬＬＯＷ ３１０８」）、Ｃ．Ｉ．ソルベントオレンジ６２、Ｃ．Ｉ．ソルベントオレンジ５４（例えば、オリヱント化学工業株式会社製の「ＶＡＬＩＦＡＳＴ（登録商標） ＯＲＡＮＧＥ ３２１０」）、Ｃ．Ｉ．ソルベントイエロー１５１（例えば、オリヱント化学工業株式会社製の「ＶＡＬＩＦＡＳＴ（登録商標） ＹＥＬＬＯＷ ３１７０」）、Ｃ．Ｉ．アシッドイエロー４２（例えば、オリヱント化学工業株式会社製の「ＶＡＬＩＦＡＳＴ（登録商標） ＹＥＬＬＯＷ １１０１」）、Ｃ．Ｉ．ピグメントイエロー７４（例えば、山陽色素株式会社製の「Ｆａｓｔ Ｙｅｌｌｏｗ ７４１６」）等のオレンジ色色素；「ＮＡＺ２４」（商品名）（山田化学工業株式会社製）、「ＤＡＡ５１」（商品名）（山田化学工業株式会社製）等が挙げられる。前記顔料としては、例えば、有機顔料としては、ベンジジン エロー（Ｐｉｇｍｅｎｔ Ｙｅｌｌｏｗ １４）等のアゾ顔料、多環顔料等が挙げられる。これら色素は、１種を用いてもよく２種以上を併用してもよい。 Examples of the dye include C.I. I. Solvent Yellow 93, “OIL YELLOW 186”, C.I. I. Solvent Yellow 16, C.I. I. Solvent Yellow 33, C.I. I. Solvent Yellow 79, C.I. I. A yellow pigment such as Solvent Yellow 82 (for example, “VALIFAST (registered trademark) YELLOW 4120” manufactured by Orient Chemical Co., Ltd.); I. Solvent Orange 60, C.I. I. Solvent Orange 80, C.I. I. Solvent Orange 45 (for example, “VALIFAST (registered trademark) YELLOW 3108” manufactured by Orient Chemical Co., Ltd.), C.I. I. Solvent Orange 62, C.I. I. Solvent Orange 54 (for example, “VALIFAST (registered trademark) ORANGE 3210” manufactured by Orient Chemical Co., Ltd.), C.I. I. Solvent Yellow 151 (for example, “VALIFAST (registered trademark) YELLOW 3170” manufactured by Orient Chemical Co., Ltd.), C.I. I. Acid Yellow 42 (for example, “VALIFAST (registered trademark) YELLOW 1101” manufactured by Orient Chemical Industry Co., Ltd.), C.I. I. Orange dyes such as CI Pigment Yellow 74 (for example, “Fast Yellow 7416” manufactured by Sanyo Dye Co., Ltd.); Kogyo Co., Ltd.). Examples of the pigment include azo pigments such as Benzidine Yellow 14 and polycyclic pigments as organic pigments. These dyes may be used alone or in combination of two or more.
前記色素の量は、前記基材樹脂１００重量部に対して０．０１〜２重量部の範囲内であることが好ましい。前記色素の量が前記基材樹脂１００重量部に対して０．０１重量部未満であると、前記ＬＥＤ照明カバー用光拡散体による３００〜５００ｎｍの波長領域の光の低減効果が不十分となるおそれがある。前記色素の量が前記基材樹脂１００重量部に対して２重量部を超えると、前記ＬＥＤ照明カバー用光拡散体の黄色の濃度が高くなりすぎて、前記ＬＥＤ照明カバー用光拡散体の光透過性を十分なレベルに維持できなくなるおそれがある。 The amount of the dye is preferably in the range of 0.01 to 2 parts by weight with respect to 100 parts by weight of the base resin. If the amount of the dye is less than 0.01 parts by weight with respect to 100 parts by weight of the base resin, the effect of reducing light in the wavelength region of 300 to 500 nm by the light diffuser for LED lighting cover becomes insufficient. There is a fear. If the amount of the dye exceeds 2 parts by weight with respect to 100 parts by weight of the base resin, the yellow density of the light diffuser for LED lighting cover becomes too high, and the light of the light diffuser for LED lighting cover becomes light. There is a risk that the permeability cannot be maintained at a sufficient level.
〔光拡散剤〕
前記光拡散剤としては、透明粒子が好適である。前記透明粒子は、光透過性を有する粒子であればよい。前記透明粒子は、均一な屈折率を有する粒子（例えば、単一の材質からなる粒子や、同一の屈折率を有するコア及びシェルからなるコア・シェル型粒子）であってもよいし、屈折率が異なる複数の部分から構成される粒子（例えば、異なる屈折率を有するコア及びシェルからなるコア・シェル型粒子）であってもよい。
(Light diffusing agent)
As the light diffusing agent, transparent particles are suitable. The transparent particles may be particles having light transparency. The transparent particle may be a particle having a uniform refractive index (for example, a particle made of a single material or a core-shell type particle made of a core and a shell having the same refractive index). May be a particle composed of a plurality of different parts (for example, a core-shell type particle composed of a core and a shell having different refractive indexes).
前記透明粒子の体積平均粒子径は、０．３〜１０μｍの範囲内であることが好ましく、０．５〜５μｍの範囲内であることがより好ましい。前記透明粒子の体積平均粒子径を０．３μｍ以上とすることで、前記ＬＥＤ照明カバー用光拡散体の光拡散性をより高めることができる。また、前記透明粒子の体積平均粒子径を１０μｍ以下にすることで、前記ＬＥＤ照明カバー用光拡散体の光透過性を良好にすることができる。 The volume average particle diameter of the transparent particles is preferably in the range of 0.3 to 10 μm, and more preferably in the range of 0.5 to 5 μm. By setting the volume average particle diameter of the transparent particles to 0.3 μm or more, the light diffusibility of the light diffuser for LED lighting cover can be further enhanced. Moreover, the light transmittance of the said light diffusing body for LED lighting covers can be made favorable by the volume average particle diameter of the said transparent particle being 10 micrometers or less.
また、前記透明粒子の粒子径の変動係数は、３０％以下であることが好ましい。前記透明粒子の粒子径の変動係数が３０％を超えると、ＬＥＤ照明カバー用光拡散体に良好な光拡散性を発現させるための粒子径の範囲内に収まる透明粒子の数が少なくなり、良好な光拡散性のＬＥＤ照明カバー用光拡散体を得にくくなる。 The coefficient of variation in the particle diameter of the transparent particles is preferably 30% or less. When the variation coefficient of the particle diameter of the transparent particles exceeds 30%, the number of transparent particles that fall within the particle diameter range for causing the light diffusing body for LED lighting cover to exhibit good light diffusibility is reduced, which is good It becomes difficult to obtain a light diffusing body for an LED lighting cover that is light diffusing.
前記光拡散剤の材質（透明粒子を構成する物質）としては、例えば、架橋（メタ）アクリル系樹脂、架橋スチレン系樹脂、ポリウレタン系樹脂、ポリエステル系樹脂、シリコーン系樹脂、フッ素系樹脂、これらの共重合体等の合成樹脂；シリカ、炭酸カルシウム、硫酸バリウム等の無機物等が挙げられる。これらの材質のうち、合成樹脂が好適であり、架橋（メタ）アクリル系樹脂、架橋スチレン系樹脂、及びこれらの共重合体（架橋（メタ）アクリル−スチレン共重合体）、並びにシリコーン系樹脂がさらに好適であり、シリコーン系樹脂が最も好適である。すなわち、前記光拡散剤は、シリコーン系樹脂粒子を含むことが好ましい。前記光拡散剤がシリコーン系樹脂粒子を含む場合、前記光拡散剤が（メタ）アクリル−スチレン共重合体粒子をさらに含むことが好ましい。これにより、特に前記基材樹脂がポリカーボネート系樹脂である場合に、前記基材樹脂との屈折率差が少ない（メタ）アクリル−スチレン共重合体粒子を光拡散剤として併用することで、適度な光拡散性をＬＥＤ照明カバー用光拡散体に付与してＬＥＤチップによる粒光感を消し、かつ、光拡散剤の添加によるＬＥＤ照明カバー用光拡散体の光透過率の低下を抑制できる。これら透明粒子は、１種のみを用いてもよく２種以上を組み合わせて用いてもよい。なお、本明細書において、「（メタ）アクリル」はメタクリル又はアクリルを意味するものとする。また、「（メタ）アクリル−スチレン共重合体」とは、単官能（メタ）アクリル系単量体と単官能スチレン系単量体とを含む単量体混合物の重合体を意味するものとする。 Examples of the material of the light diffusing agent (substance constituting the transparent particles) include a crosslinked (meth) acrylic resin, a crosslinked styrene resin, a polyurethane resin, a polyester resin, a silicone resin, a fluorine resin, and the like. Synthetic resins such as copolymers; inorganic substances such as silica, calcium carbonate, and barium sulfate. Of these materials, synthetic resins are preferable, and crosslinked (meth) acrylic resins, crosslinked styrene resins, copolymers thereof (crosslinked (meth) acrylic-styrene copolymers), and silicone resins are preferred. Further, a silicone resin is most preferable. That is, the light diffusing agent preferably contains silicone resin particles. When the light diffusing agent includes silicone-based resin particles, it is preferable that the light diffusing agent further includes (meth) acryl-styrene copolymer particles. Thereby, particularly when the base resin is a polycarbonate resin, the (meth) acryl-styrene copolymer particles having a small difference in refractive index from the base resin are used in combination as a light diffusing agent. The light diffusibility is imparted to the light diffuser for LED lighting cover to eliminate the graininess caused by the LED chip, and the decrease in the light transmittance of the light diffuser for LED lighting cover due to the addition of the light diffusing agent can be suppressed. These transparent particles may be used alone or in combination of two or more. In the present specification, “(meth) acryl” means methacryl or acryl. Further, “(meth) acryl-styrene copolymer” means a polymer of a monomer mixture containing a monofunctional (meth) acrylic monomer and a monofunctional styrene monomer. .
前記光拡散剤が、架橋（メタ）アクリル系樹脂、架橋スチレン系樹脂、これらの共重合体等のような、架橋性単量体（２つ以上のエチレン性不飽和を有する化合物）を含むビニル系単量体（少なくとも１つのエチレン性不飽和を有する化合物）の重合体からなる場合、前記重合体は、架橋性単量体に由来する構造単位を、１〜５０重量％含むことが好ましく、５〜３０重量％含むことがより好ましい。前記の範囲である場合、光拡散剤中に高いレベルで３次元的な網目構造を構築することができ、その結果、光拡散性により優れたＬＥＤ照明カバー用光拡散体を実現できる。 The vinyl in which the light diffusing agent contains a crosslinkable monomer (compound having two or more ethylenic unsaturations) such as a cross-linked (meth) acrylic resin, a cross-linked styrene resin, and a copolymer thereof. When composed of a polymer of a system monomer (a compound having at least one ethylenic unsaturation), the polymer preferably contains 1 to 50% by weight of a structural unit derived from a crosslinkable monomer, It is more preferable to contain 5 to 30% by weight. When it is in the above range, a three-dimensional network structure can be constructed at a high level in the light diffusing agent, and as a result, a light diffusing body for an LED lighting cover that is superior in light diffusibility can be realized.
前記架橋性単量体としては、例えば、メタクリル酸アリル、エチレングリコールジ（メタ）アクリレート、ジエチレングリコールジ（メタ）アクリレート、トリエチレングリコールジ（メタ）アクリレート、ノナエチレングリコールジ（メタ）アクリレート、テトラデカエチレングリコールジ（メタ）アクリレート、デカエチレングリコールジ（メタ）アクリレート、ペンタデカエチレングリコールジ（メタ）アクリレート、１，３−ブチレングリコールジ（メタ）アクリレート、１，４−ブタンジオールジ（メタ）アクリレート、１，６−ヘキサンジオールジ（メタ）アクリレート、グリセリンジ（メタ）アクリレート、トリメチロールプロパントリ（メタ）アクリレート、ペンタエリスリトールテトラ（メタ）アクリレート、フタル酸ジエチレングリコールジ（メタ）アクリレート、カプロラクトン変性ジペンタエリスルトールヘキサ（メタ）アクリレート、カプロラクトン変性ヒドロキシピバリン酸エステルネオペンチルグリコールジアクリレート、ポリエステルアクリレート、ウレタンアクリレート等の（メタ）アクリル酸エステル系多官能単量体；ジビニルベンゼン、ジビニルナフタレンおよびこれらの誘導体である芳香族ビニル系多官能単量体が挙げられる。これら架橋性単量体は２種以上を組み合わせて用いることもできる。なお、本明細書において、「（メタ）アクリレート」はメタクリレート又はアクリレートを意味するものとする。 Examples of the crosslinkable monomer include allyl methacrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, nonaethylene glycol di (meth) acrylate, and tetradeca. Ethylene glycol di (meth) acrylate, decaethylene glycol di (meth) acrylate, pentadecaethylene glycol di (meth) acrylate, 1,3-butylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate 1,6-hexanediol di (meth) acrylate, glycerin di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, diphthalic acid (Meth) acrylic acid ester-based polyfunctional monomers such as tylene glycol di (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate, caprolactone-modified hydroxypivalate ester neopentyl glycol diacrylate, polyester acrylate, urethane acrylate Dimer benzene, divinyl naphthalene, and aromatic vinyl polyfunctional monomers which are derivatives thereof. These crosslinkable monomers can also be used in combination of two or more. In the present specification, “(meth) acrylate” means methacrylate or acrylate.
前記架橋（メタ）アクリル系樹脂は、単官能（メタ）アクリル系単量体を含んでいる。上記単官能（メタ）アクリル系単量体としては、１つのアクリロイルオキシ基又はメタクリロイルオキシ基を有する化合物であれば特に限定されるものではなく、例えば、アクリル酸、アクリル酸メチル、アクリル酸エチル、アクリル酸ｎ−ブチル、アクリル酸イソブチル、アクリル酸ドデシル、アクリル酸ステアリル、アクリル酸２−エチルヘキシル、アクリル酸テトラヒドロフルフリル、メタクリル酸、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸ｎ−プロピル、メタクリル酸ｎ−ブチル、メタクリル酸イソブチル、メタクリル酸ｎ−オクチル、メタクリル酸ドデシル、メタクリル酸２−エチルヘキシル、メタクリル酸ステアリル等が挙げられる。これら単官能（メタ）アクリル系単量体は、１種を単独で用いてもよく、２種以上を混合して用いてもよい。 The crosslinked (meth) acrylic resin contains a monofunctional (meth) acrylic monomer. The monofunctional (meth) acrylic monomer is not particularly limited as long as it is a compound having one acryloyloxy group or methacryloyloxy group. For example, acrylic acid, methyl acrylate, ethyl acrylate, N-butyl acrylate, isobutyl acrylate, dodecyl acrylate, stearyl acrylate, 2-ethylhexyl acrylate, tetrahydrofurfuryl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n methacrylate -Butyl, isobutyl methacrylate, n-octyl methacrylate, dodecyl methacrylate, 2-ethylhexyl methacrylate, stearyl methacrylate and the like. These monofunctional (meth) acrylic monomers may be used alone or in a combination of two or more.
前記スチレン系樹脂は、単官能スチレン系単量体を含んでいる。上記単官能スチレン系単量体としては、１つのエチレン性不飽和基を有するスチレン類であれば特に限定されるものではなく、例えば、スチレン、ｏ−メチルスチレン、ｍ−メチルスチレン、ｐ−メチルスチレン、α−メチルスチレン等が挙げられる。これら単官能スチレン系単量体は、１種を単独で用いてもよく、２種以上を混合して用いてもよい。なお、架橋（メタ）アクリル系樹脂及び架橋スチレン系樹脂の共重合体は、上記単官能（メタ）アクリル系単量体及び上記単官能スチレン系単量体を含んでいる。 The styrenic resin contains a monofunctional styrenic monomer. The monofunctional styrene-based monomer is not particularly limited as long as it is a styrene having one ethylenically unsaturated group. For example, styrene, o-methylstyrene, m-methylstyrene, p-methyl Examples thereof include styrene and α-methylstyrene. These monofunctional styrenic monomers may be used alone or in combination of two or more. The copolymer of the cross-linked (meth) acrylic resin and the cross-linked styrene resin contains the monofunctional (meth) acrylic monomer and the monofunctional styrene monomer.
前記光拡散剤の屈折率は、前記基材樹脂の屈折率と異なっていればよいが、前記基材樹脂の屈折率との屈折率差が０．０１〜０．２の範囲内であることが好ましく、前記基材樹脂の屈折率との屈折率差が０．０２〜０．１の範囲内であることがより好ましい。 The refractive index of the light diffusing agent may be different from the refractive index of the base resin, but the refractive index difference from the refractive index of the base resin is within a range of 0.01 to 0.2. Is preferable, and the difference in refractive index from the refractive index of the base resin is more preferably in the range of 0.02 to 0.1.
前記透明粒子の形状は、特に限定されるものではないが、球状であることが好ましい。 The shape of the transparent particles is not particularly limited, but is preferably spherical.
前記光拡散剤は、ＬＥＤ照明カバー用光拡散体全体にわたって均一に基材樹脂中に分散させてもよく、基材樹脂の入光面側及び／又は出光面側に光拡散剤の層として設けてもよい。 The light diffusing agent may be uniformly dispersed in the base resin throughout the light diffuser for the LED lighting cover, and is provided as a layer of the light diffusing agent on the light incident surface side and / or the light emitting surface side of the base resin. May be.
前記ＬＥＤ照明カバー用光拡散体における光拡散剤の含有量は、本発明の効果を発現する条件であれば特に限定されないが、０．５〜５．０重量％の範囲内であることが好ましい。光拡散剤の添加量を０．５重量％以上にすることで、前記ＬＥＤ照明カバー用光拡散体の光拡散性をより高めることができる。また、光拡散剤の含有量を５．０重量％以下にすることで、前記ＬＥＤ照明カバー用光拡散体の光透過性を良好にすることができる。 The content of the light diffusing agent in the light diffusing body for LED lighting cover is not particularly limited as long as the effect of the present invention is exhibited, but is preferably in the range of 0.5 to 5.0% by weight. . By making the addition amount of the light diffusing agent 0.5% by weight or more, the light diffusibility of the light diffuser for LED lighting cover can be further enhanced. Moreover, the light transmittance of the said light diffusing body for LED illumination covers can be made favorable by content of a light-diffusion agent being 5.0 weight% or less.
〔基材樹脂〕
前記基材樹脂は、照明を実現できる程度の光透過性を有するものであれば特に限定されるものではないが、例えば、ポリカーボネート系樹脂；アセチルセルロース、ニトロセルロース、アセチルブチルセルロース、エチルセルロース、メチルセルロース等のセルロース誘導体；酢酸ビニルの単独重合体又は共重合体、塩化ビニルの単独重合体又は共重合体、塩化ビニリデンの単独重合体又は共重合体；ポリビニルホルマール、ポリビニルブチラール等のアセタール系樹脂；アクリル樹脂（ポリアクリル酸エステル）及びその共重合樹脂、メタクリル樹脂（ポリメタクリル酸エステル）及びその共重合樹脂等の（メタ）アクリル系樹脂；ポリスチレン樹脂；ポリアミド樹脂；ポリエチレンテレフタラート樹脂（以下「ＰＥＴ樹脂」と略記する）等の線状ポリエステル樹脂等が挙げられる。これらの樹脂の中では、透明性、耐熱性、衝撃強度の観点から、ポリカーボネート系樹脂、（メタ）アクリル樹脂、ＰＥＴ樹脂が好ましく、それらの中でも、耐熱性及び耐衝撃性に優れるポリカーボネート系樹脂が特に好ましい。
[Base resin]
The base resin is not particularly limited as long as it has a light transmittance that can realize illumination. For example, polycarbonate resin; acetylcellulose, nitrocellulose, acetylbutylcellulose, ethylcellulose, methylcellulose, etc. Cellulose derivatives; vinyl acetate homopolymers or copolymers, vinyl chloride homopolymers or copolymers, vinylidene chloride homopolymers or copolymers; acetal resins such as polyvinyl formal, polyvinyl butyral; acrylic resins (Polyacrylic acid ester) and its copolymer resin, (meth) acrylic resin such as methacrylic resin (polymethacrylic acid ester) and its copolymer resin; polystyrene resin; polyamide resin; polyethylene terephthalate resin (hereinafter “PET resin”) Abbreviated) It includes linear polyester resins of. Among these resins, polycarbonate resins, (meth) acrylic resins, and PET resins are preferable from the viewpoints of transparency, heat resistance, and impact strength. Among them, polycarbonate resins that are excellent in heat resistance and impact resistance are preferable. Particularly preferred.
本発明のＬＥＤ照明カバー用光拡散体の成形方法は、特に限定されないが、Ｔダイ押出成形によるシート成形、異形押出成形による円筒形状又は部分円筒形状への成形、射出成形やインジェクションブロー成形による電球形状への成形、シート状に成形した後で真空成形や圧空成形により円盤形状に成形する方法などが挙げられる。 The method of forming the light diffusing body for LED lighting cover of the present invention is not particularly limited, but a light bulb by sheet molding by T-die extrusion molding, cylindrical or partial cylindrical molding by profile extrusion molding, injection molding or injection blow molding. Examples thereof include a method of forming into a disk shape after forming into a shape or forming into a sheet by vacuum forming or pressure forming.
〔ＬＥＤ照明装置〕
本発明のＬＥＤ照明装置は、前記の本発明のＬＥＤ照明カバー用光拡散体を備えている。本発明のＬＥＤ照明装置は、５００ｎｍより波長が長い領域に分光放射照度のピークを有することが好ましい。これにより、波長の短い３６０ｎｍ〜５００ｎｍの分光放射照度の積算値を低減でき、波長の短い光に寄り易い虫（例えば蛾）の誘引をさらに低減することができる。
[LED lighting device]
The LED illumination device of the present invention includes the light diffuser for an LED illumination cover of the present invention. The LED illumination device of the present invention preferably has a peak of spectral irradiance in a region having a wavelength longer than 500 nm. Thereby, the integrated value of spectral irradiance with a short wavelength of 360 nm to 500 nm can be reduced, and the attraction of insects (for example, moths) that tend to approach light with a short wavelength can be further reduced.
本発明のＬＥＤ照明装置は、電源を入れ発光させ分光放射照度を測定したときに、波長３６０ｎｍ〜７８０ｎｍの分光放射照度の積算値をＡ、波長３６０ｎｍ〜５００ｎｍの分光放射照度の積算値をＢとすると、Ｂ／Ａの値が、１／１０以下であることが好ましく、１／１５以下であることがより好ましく、１／１７であることがさらに好ましく、１／１００以下であることが最も好ましい。このように波長の短い３６０ｎｍ〜５００ｎｍの分光放射照度の積算値を十分に小さくすることで、波長の短い光に寄り易い虫（例えば蛾）の誘引をさらに低減することができる。本発明のＬＥＤ照明装置は、５００ｎｍより波長が長い領域に分光放射照度のピークを有し、かつ、Ｂ／Ａの値が上記範囲内であることが特に好ましい。 When the LED illumination device of the present invention is turned on to emit light and measure the spectral irradiance, the integrated value of the spectral irradiance of wavelengths 360 nm to 780 nm is A, and the integrated value of the spectral irradiance of wavelengths 360 nm to 500 nm is B. Then, the value of B / A is preferably 1/10 or less, more preferably 1/15 or less, further preferably 1/17, and most preferably 1/100 or less. . Thus, by sufficiently reducing the integrated value of spectral irradiance of 360 nm to 500 nm having a short wavelength, it is possible to further reduce the attraction of insects (for example, moths) that tend to approach light having a short wavelength. It is particularly preferable that the LED illumination device of the present invention has a peak of spectral irradiance in a region having a wavelength longer than 500 nm, and the value of B / A is within the above range.
本発明のＬＥＤ照明装置は、色温度が４０００Ｋ以下であるＬＥＤチップを備えることが好ましく、色温度が３５００〜４０００ＫであるＬＥＤチップを備えることがより好ましい。これにより、ＬＥＤ照明装置を発光させたときの波長３６０ｎｍ〜５００ｎｍの分光放射照度の積算値をさらに低減でき、波長の短い光に寄り易い虫（例えば蛾）の誘引をさらに低減することができる。 The LED lighting device of the present invention preferably includes an LED chip having a color temperature of 4000K or less, and more preferably includes an LED chip having a color temperature of 3500 to 4000K. Thereby, the integrated value of the spectral irradiance with a wavelength of 360 nm to 500 nm when the LED illumination device is caused to emit light can be further reduced, and the attraction of insects (for example, moths) that tend to approach light with a short wavelength can be further reduced.
〔害虫防除用のＬＥＤ照明装置及びそのＬＥＤ照明カバーに用いられるＬＥＤ照明カバー用光拡散体〕
本発明のＬＥＤ照明カバー用光拡散体及びＬＥＤ照明装置は、蛾等の害虫の誘引を防止する効果を有するので、害虫防除用ＬＥＤ照明装置のＬＥＤ照明カバーに用いられるＬＥＤ照明カバー用光拡散体及び害虫防除用のＬＥＤ照明装置としても好適である。
[LED illuminator for pest control and light diffuser for LED illumination cover used for LED illumination cover]
The light diffuser for LED lighting cover and the LED lighting device of the present invention have the effect of preventing the attraction of pests such as moths, so the light diffuser for LED lighting cover used for the LED lighting cover of the LED lighting device for pest control It is also suitable as an LED lighting device for pest control.
害虫防除用のＬＥＤ照明装置及びそのＬＥＤ照明カバーに用いられるＬＥＤ照明カバー用光拡散体は、例えば、屋外の果樹園（例えば、リンゴ、カキ、ナシ、モモ、イチゴ、メロン、ブドウ等の果樹の果樹園）、花木畑（例えば、トルコギキョウ、バラ、カーネーション等の花木類の花木畑）、菜園（例えば、トマト、なす、ピーマン、キャベツ、レタス、ねぎ、おおば、さつまいも等の野菜の菜園）、茶畑、スイートコーン畑、芝生等で使用できる。本発明のＬＥＤ照明カバー用光拡散体及びＬＥＤ照明装置を屋外の果樹園、花木畑、菜園等で使用することで、害虫防除のための農薬散布の回数を低減でき、低農薬栽培が可能となる。本発明のＬＥＤ照明カバー用光拡散体及びＬＥＤ照明装置は、波長３００ｎｍ〜５００ｎｍの光を好む害虫、例えばヤガ類（吸ガ類（アケビコノハ、アカエグリバなど）、ハスモンヨトウ、オオタバコガ、シロイチモジヨトウ、ベニキノメイガ、コクロヒメハマキ、チャノホソガ、チャノコカクモンハマキ、チャハマキ、アワノメイガ、スジキリヨトウなど）やカメムシ類などの行動（飛来、果実の吸汁、産卵、交尾など）を抑制することによって、害虫の侵入や繁殖を抑制することができる。 The LED illuminating device for controlling pests and the LED diffusing light diffuser used for the LED lighting cover include, for example, outdoor orchards (for example, fruit trees such as apples, oysters, pears, peaches, strawberries, melons, and grapes). Orchards), flower gardens (eg, flower gardens of eustoma, roses, carnations, etc.), vegetable gardens (eg, vegetable gardens such as tomatoes, eggplants, peppers, cabbage, lettuce, green onions, aunts, sweet potatoes), Can be used in tea fields, sweet corn fields, lawns, etc. By using the light diffuser for LED lighting cover and the LED lighting device of the present invention in outdoor orchards, flower gardens, vegetable gardens, etc., the number of times of pesticide spraying for pest control can be reduced, and low pesticide cultivation is possible Become. The light diffuser for an LED lighting cover and the LED lighting device of the present invention are pests that prefer light with a wavelength of 300 nm to 500 nm, such as moths (sucking moths (Akebiko noha, Akaegeriba etc.), Lotus moth, Tobacco moth, Shirochimo moth, Benikinomeiga, Kokurohimehamaki, Invasion and breeding of pests can be suppressed by suppressing the behavior (flying, fruit sucking, egg-laying, mating, etc.) such as chanohosoga, chanokokumon-hamakaki, chahamaki, awanomeiga, sujikiriyoto, and stink bugs.
以下、実施例、参考例及び比較例により本発明を説明するが、本発明はこれに限定されるものではない。まず、以下の実施例、参考例及び比較例における、透明粒子の体積平均粒子径及び粒子径の変動係数の測定方法、ＬＥＤ照明カバー用光拡散体の光透過率及び分散度（Ｄ５０）の測定方法、並びにＬＥＤ照明装置の分光放射照度の測定方法を説明する。 EXAMPLES Hereinafter, although an Example , a reference example, and a comparative example demonstrate this invention, this invention is not limited to this. First, in the following examples , reference examples, and comparative examples, the volume average particle diameter of the transparent particles and the measurement method of the coefficient of variation of the particle diameter, the light transmittance and the dispersity (D50) of the light diffuser for LED lighting cover are measured. The method and the method for measuring the spectral irradiance of the LED illumination device will be described.
〔透明粒子の体積平均粒子径及び粒子径の変動係数の測定方法〕
光拡散剤として使用した透明粒子の体積平均粒子径及び粒子径の変動係数の測定は、以下のようにしてコールター法により行った。
[Method for measuring volume average particle diameter and coefficient of variation of particle diameter of transparent particles]
The volume average particle diameter and the coefficient of variation of the particle diameter of the transparent particles used as the light diffusing agent were measured by the Coulter method as follows.
透明粒子の体積平均粒子径は、コールターＭｕｌｔｉｓｉｚｅｒTM ３（ベックマン・コールター株式会社製測定装置）により測定する。測定は、ベックマン・コールター株式会社発行のＭｕｌｔｉｓｉｚｅｒTM ３ユーザーズマニュアルに従って校正されたアパチャーを用いて実施するものとする。 The volume average particle diameter of the transparent particles is measured by Coulter Multisizer ™ 3 (measurement device manufactured by Beckman Coulter, Inc.). Measurement shall be performed using an aperture calibrated according to the Multisizer ™ 3 User's Manual issued by Beckman Coulter, Inc.
なお、測定に用いるアパチャーは、測定する透明粒子の大きさによって、適宜選択する。Ｃｕｒｒｅｎｔ（アパチャー電流）及びＧａｉｎ（ゲイン）は、選択したアパチャーのサイズによって、適宜設定する。例えば、５０μｍのサイズを有するアパチャーを選択した場合、Ｃｕｒｒｅｎｔ（アパチャー電流）は−８００、Ｇａｉｎ（ゲイン）は４と設定する。 The aperture used for the measurement is appropriately selected depending on the size of the transparent particle to be measured. Current (aperture current) and Gain (gain) are appropriately set according to the size of the selected aperture. For example, when an aperture having a size of 50 μm is selected, the current (aperture current) is set to −800 and the gain (gain) is set to 4.
測定用試料としては、透明粒子０．１ｇを０．１重量％ノニオン性界面活性剤水溶液１０ｍ１中にタッチミキサー（ヤマト科学株式会社製、「ＴＯＵＣＨＭＩＸＥＲ ＭＴ−３１」）及び超音波洗浄器（株式会社ヴェルヴォクリーア製、「ＵＬＴＲＡＳＯＮＩＣＣＬＥＡＮＥＲ ＶＳ−１５０」）を用いて分散させ、分散液としたものを使用する。測定中はビーカー内を気泡が入らない程度に緩く攪拌しておき、透明粒子を１０万個測定した時点で測定を終了する。透明粒子の体積平均粒子径は、１０万個の粒子の体積基準の粒度分布における算術平均である。 As a sample for measurement, 0.1 g of transparent particles was added to 10 ml of a 0.1% by weight nonionic surfactant aqueous solution with a touch mixer (manufactured by Yamato Kagaku Co., Ltd., “TOUCHMIXER MT-31”) and an ultrasonic washer (Inc. Dispersed using “ULTRASONICCLEANER VS-150” (manufactured by VervoCrea) and used as a dispersion. During the measurement, the beaker is gently stirred to the extent that bubbles do not enter, and the measurement is terminated when 100,000 transparent particles are measured. The volume average particle diameter of the transparent particles is an arithmetic average in a volume-based particle size distribution of 100,000 particles.
透明粒子の粒子径の変動係数（ＣＶ値）を、以下の数式によって算出する。
透明粒子の粒子径の変動係数＝（透明粒子の体積基準の粒度分布の標準偏差
÷透明粒子の体積平均粒子径）×１００
The coefficient of variation (CV value) of the particle diameter of the transparent particles is calculated by the following formula.
Coefficient of variation of particle diameter of transparent particles = (standard deviation of volume-based particle size distribution of transparent particles
÷ Volume average particle diameter of transparent particles) × 100
〔ＬＥＤ照明カバー用光拡散体の光透過率の測定方法〕
まず、平板状のＬＥＤ照明カバー用光拡散体を５０ｍｍ×２５ｍｍの平面サイズに切り出して、測定試料とした。次いで、測定試料を、気温２０℃、相対湿度６５％に設定した恒温恒湿室に１時間以上静置することによって状態調整した後、測定試料の分光光度測定を行う。
[Measurement method of light transmittance of light diffuser for LED lighting cover]
First, a plate-like light diffuser for an LED lighting cover was cut into a plane size of 50 mm × 25 mm to obtain a measurement sample. Next, the measurement sample is conditioned by allowing it to stand in a constant temperature and humidity chamber set at an air temperature of 20 ° C. and a relative humidity of 65% for 1 hour or longer, and then the spectrophotometric measurement of the measurement sample is performed.
気温２０℃、相対湿度６５％に設定した恒温恒湿室内で、積分球を装着した紫外可視光分光光度計（ＵＶ−ＶＩＳＩＢＬＥ ＳＰＥＣＴＲＯＰＨＯＴＯＭＥＴＥＲ）（株式会社島津製作所製、型番「ＵＶ−２４５０」）に前記測定試料をセットして３００ｎｍ〜８００ｎｍの分光透過率を測定する。具体的には、まず、前記紫外可視光分光光度計に対して、前記紫外可視光分光光度計に付属のフィルムホルダをセットする。次に、前記紫外可視光分光光度計により波長３００ｎｍ〜８００ｎｍの分光透過率を測定し、５００ｎｍの透過光強度が１００％となるように前記紫外可視光分光光度計を補正する。次に、前記フィルムホルダに前記測定試料をセットし、波長３００ｎｍ〜８００ｎｍの分光透過率を測定する。 In a constant temperature and humidity chamber set to an air temperature of 20 ° C. and a relative humidity of 65%, the ultraviolet-visible spectrophotometer equipped with an integrating sphere (UV-VISIBLE SPECTROTOPOMETER) (manufactured by Shimadzu Corporation, model number “UV-2450”) A measurement sample is set and a spectral transmittance of 300 nm to 800 nm is measured. Specifically, first, a film holder attached to the ultraviolet visible light spectrophotometer is set on the ultraviolet visible light spectrophotometer. Next, the spectral transmittance at a wavelength of 300 nm to 800 nm is measured by the ultraviolet visible light spectrophotometer, and the ultraviolet visible light spectrophotometer is corrected so that the transmitted light intensity at 500 nm becomes 100%. Next, the measurement sample is set in the film holder, and the spectral transmittance at a wavelength of 300 nm to 800 nm is measured.
また、波長３００〜５００ｎｍの１ｎｍステップの各波長で測定した光透過率の数値の全てを合計し、波長３００〜５００ｎｍのステップ数（合計した数値の個数に相当）で割ることにより、波長３００〜５００ｎｍの平均光透過率を算出した。同様に、波長６００〜８００ｎｍの１ｎｍステップの各波長で測定した光透過率の数値の全てを合計し、波長６００〜８００ｎｍのステップ数（合計した数値の個数に相当）で割ることにより、波長６００〜８００ｎｍの平均光透過率を算出した。また、波長３００〜８００ｎｍの１ｎｍステップの各波長で測定した光透過率が最大値となるときの波長を、３００〜８００ｎｍの波長領域における光透過率のピークの波長とした。 Further, by summing all the numerical values of the light transmittance measured at each wavelength of 1 nm steps of wavelengths 300 to 500 nm, and dividing by the number of steps of wavelengths 300 to 500 nm (corresponding to the total number of numerical values), The average light transmittance at 500 nm was calculated. Similarly, by summing all the numerical values of the light transmittance measured at each wavelength of 1 nm steps of wavelengths 600 to 800 nm and dividing by the number of steps of wavelengths 600 to 800 nm (corresponding to the total number of values), the wavelength 600 An average light transmittance of ˜800 nm was calculated. In addition, the wavelength at which the light transmittance measured at each wavelength in the 1 nm step of the wavelength of 300 to 800 nm becomes the maximum value is the peak wavelength of the light transmittance in the wavelength region of 300 to 800 nm.
測定条件及び紫外可視光分光光度計のパラメーター（装置パラメーター）は、以下の通りとする。 The measurement conditions and parameters (instrument parameters) of the UV-visible spectrophotometer are as follows.
（測定条件）
・測定波長範囲：３００ｎｍ〜８００ｎｍ
・スキャンスピード：中速
・サンプリングピッチ：１ｎｍ
・測定モード：シングル
（装置パラメーター）
・測光値：透過
・スリット巾：２．０ｍｍ
・光源切替波長：３６０ｎｍ
・Ｓ／Ｒ切替：標準
(Measurement condition)
Measurement wavelength range: 300 nm to 800 nm
・ Scanning speed: Medium speed ・ Sampling pitch: 1 nm
・ Measurement mode: Single (Device parameter)
-Photometric value: Transmission-Slit width: 2.0 mm
・ Light source switching wavelength: 360 nm
・ S / R switching: Standard
〔ＬＥＤ照明カバー用光拡散体の分散度（Ｄ５０）の測定方法〕
ＬＥＤ照明カバー用光拡散体表面に対してその法線方向から光を当てたときに、光透過率が直進光透過率の５０％になる透過角として定義されるＬＥＤ照明カバー用光拡散体の分散度（Ｄ５０）は、自動変角光度計（株式会社村上色彩技術研究所製「ゴニオフォトメータＧＰ−２００」）を用いて以下の手順で求める。
[Measurement method of dispersion degree (D50) of light diffuser for LED lighting cover]
The light diffuser for LED lighting cover is defined as the transmission angle at which the light transmittance is 50% of the straight light transmittance when light is applied to the surface of the light diffuser for LED lighting cover from the normal direction. The dispersity (D50) is obtained by the following procedure using an automatic goniophotometer (“Goniophotometer GP-200” manufactured by Murakami Color Research Laboratory Co., Ltd.).
自動変角光度計の光源からの直進光を、光源から７５ｃｍの距離に設置した平板状のＬＥＤ照明カバー用光拡散体に対してＬＥＤ照明カバー用光拡散体表面の法線方向から当てる。ＬＥＤ照明カバー用光拡散体を透過した光の強度を可動式受光器にて受光角度を変化させながら測定する。測定された強度を透過率に換算し、ＬＥＤ照明カバー用光拡散体表面の法線方向に対する受光方向の角度（透過角）に対応させて透過率をグラフにプロットする。このグラフから、光透過率がＬＥＤ照明カバー用光拡散体表面の法線方向の光の透過率（直進光透過率；透過角が０度のときの光透過率）の５０％になるところの角度（透過角）を求める。この角度（透過角）を分散度（Ｄ５０）と称する。この分散度（Ｄ５０）の単位は「°（度）」である。また、分散度（Ｄ５０）は、大きいほど光拡散性に優れていることを意味する。 The straight light from the light source of the automatic goniophotometer is applied from the normal direction of the surface of the light diffuser for the LED illumination cover to the flat light diffuser for the LED illumination cover installed at a distance of 75 cm from the light source. The intensity of light transmitted through the light diffuser for the LED lighting cover is measured with a movable light receiver while changing the light receiving angle. The measured intensity is converted into a transmittance, and the transmittance is plotted on a graph corresponding to the angle (transmission angle) of the light receiving direction with respect to the normal direction of the surface of the light diffuser for the LED lighting cover. From this graph, the light transmittance is 50% of the light transmittance in the normal direction of the light diffuser surface for the LED lighting cover (straight light transmittance; light transmittance when the transmission angle is 0 degree). Find the angle (transmission angle). This angle (transmission angle) is referred to as the degree of dispersion (D50). The unit of the degree of dispersion (D50) is “° (degree)”. Moreover, it means that it is excellent in light diffusibility, so that dispersion degree (D50) is large.
図３は、ＬＥＤ照明カバー用光拡散体の透過光強度を、自動変角光度計を用いて測定した例である。縦軸は透過光強度の相対値で、この値が５０％時のグラフのプロット点から垂線を引き、横軸との交点を求める。この横軸の値は角度（°）であり、分散度（Ｄ５０）と呼ぶ。この図３に示す測定結果では、分散度（Ｄ５０）は５７．３°となる。なお、分散度（Ｄ５０）は、横軸の原点０°の左右２つの値（透過光強度が５０％のときの角度の値）の絶対値の相加平均とする。 FIG. 3 is an example in which the transmitted light intensity of the light diffuser for LED lighting cover is measured using an automatic variable angle photometer. The vertical axis represents the relative value of the transmitted light intensity, and a perpendicular is drawn from the plotted point of the graph when this value is 50% to obtain the intersection with the horizontal axis. The value on the horizontal axis is the angle (°), and is called the degree of dispersion (D50). In the measurement result shown in FIG. 3, the degree of dispersion (D50) is 57.3 °. The dispersity (D50) is the arithmetic average of the absolute values of the two left and right values (angle value when the transmitted light intensity is 50%) at the origin of 0 ° on the horizontal axis.
〔ＬＥＤ照明装置の分光放射照度及びその積算値の測定方法〕
ＬＥＤ照明装置の分光放射照度は、以下のようにして測定した。気温２５度に設定した暗室内にＬＥＤ照明装置を設置し、ＬＥＤ照明装置の電源を入れ、２０分間発光させた後、ＬＥＤ照明装置の発光部直下１ｍの位置で、分光放射照度計（型番「ＣＬ−５００Ａ」、コニカミノルタ株式会社製）を用いて、以下の測定条件で分光放射照度、波長３６０〜７８０ｎｍの分光放射強度の積算値、及び波長３６０〜５００ｎｍの分光放射強度の積算値を測定した。
（分光放射照度及び波長３６０〜７８０ｎｍの分光放射強度の積算値の測定条件）
測定波長範囲：３６０ｎｍ〜７８０ｎｍ
サンプリングピッチ：１ｎｍ
（波長３６０〜５００ｎｍの分光放射強度の積算値の測定条件）
測定波長範囲：３６０ｎｍ〜５００ｎｍ
サンプリングピッチ：１ｎｍ
[Measuring method of spectral irradiance of LED lighting device and its integrated value]
The spectral irradiance of the LED illumination device was measured as follows. After installing the LED lighting device in the dark room set at 25 degrees Celsius, turning on the LED lighting device and letting it emit light for 20 minutes, the spectroradiometer (model number “ CL-500A "(manufactured by Konica Minolta Co., Ltd.) was used to measure the spectral irradiance, the integrated value of the spectral radiant intensity at a wavelength of 360 to 780 nm, and the integrated value of the spectral radiant intensity at a wavelength of 360 to 500 nm under the following measurement conditions. did.
(Measurement conditions for the integrated value of spectral irradiance and spectral radiant intensity at a wavelength of 360 to 780 nm)
Measurement wavelength range: 360 nm to 780 nm
Sampling pitch: 1 nm
(Measurement conditions for the integrated value of spectral radiation intensity at wavelengths of 360 to 500 nm)
Measurement wavelength range: 360 nm to 500 nm
Sampling pitch: 1 nm
〔ＬＥＤチップの色温度の測定方法〕
分光放射照度計（型番「ＣＬ−５００Ａ」、コニカミノルタ株式会社製）を用いて、ＪＩＳ Ｚ ８７２４-1997規定の分光測色方法により光源の分光分布を測定して光源色の三刺激値Ｘ，Ｙ，Ｚ又は色度座標ｘ，ｙを求め、ＪＩＳ Ｚ ８７２５-1997規定の計算式により光源色の三刺激値Ｘ，Ｙ，Ｚ又は色度座標ｘ，ｙから色温度（相関色温度）を求めた。
[Measurement method of LED chip color temperature]
Spectral irradiance meter (model number "CL-500A", Konica Minolta Co., Ltd.) using, JIS Z 8724 -1997 provisions spectrophotometer by measuring the spectral distribution of the light source of the light source color by the color method tristimulus values X, Y, Z or the chromaticity coordinates x, seeking y, JIS Z 8725 -1997 provisions calculated tristimulus value of the light source color by equation X, Y, Z or the chromaticity coordinates x, color from y temperature (correlated color temperature) Asked.
〔参考例１〕
光拡散剤としての透明粒子の１種であるシリコーン系樹脂粒子（アイカ工業株式会社製、商品名「ガンツパール（登録商標）ＳＩ−０２０」、体積平均粒子径２．１μｍ、粒子径の変動係数２６．６％）０．８重量部と、色素としての後述する混合物全体に対して２００重量ｐｐｍのＣ．Ｉ．ソルベントイエロー９３及び後述する混合物全体に対して５００重量ｐｐｍのＣ．Ｉ．ソルベントオレンジ６０と、基材樹脂としてのポリカーボネート系樹脂（三菱エンジニアリングプラスチック社、商品名「ユーピロン（登録商標）Ｓ２０００ＵＲ」）１００重量部とをそれぞれ計量し、ヘンシェルミキサーで１５分間混合して、混合物を得た。この混合物を単軸型押出し機（株式会社星プラスチック製、型番「Ｒ５０」）を用いて温度２５０〜２８０℃、吐出量１０〜２５ｋｇ／ｈの条件で押出し、水冷後にペレタイザーでカットしてＬＥＤ照明カバー用光拡散体を得た。
[ Reference Example 1 ]
Silicone resin particles (trade name “Gantz Pearl (registered trademark) SI-020” manufactured by Aika Kogyo Co., Ltd., volume average particle size 2.1 μm, coefficient of variation in particle size), which is one type of transparent particles as a light diffusing agent 26.6%) 0.8 parts by weight, and 200 ppm by weight of C.I. I. 500 ppm by weight of C.I. based on Solvent Yellow 93 and the entire mixture described below. I. Solvent Orange 60 and 100 parts by weight of polycarbonate resin (Mitsubishi Engineering Plastics, trade name “Iupilon (registered trademark) S2000UR”) as a base resin are weighed and mixed for 15 minutes with a Henschel mixer. Obtained. This mixture was extruded using a single screw extruder (made by Hoshi Plastic Co., Ltd., model number “R50”) under conditions of a temperature of 250 to 280 ° C. and a discharge rate of 10 to 25 kg / h. A light diffuser for the cover was obtained.
次いで、得られたペレット状のＬＥＤ照明カバー用光拡散体を、射出成形機（日精樹脂工業株式会社製、型番「ＦＮＸ１４０」）を用いて、温度３００℃の条件で射出成形することにより、光拡散剤の含有量が０．８重量％で、厚み１ｍｍ、平面サイズ５０ｍｍ×５０ｍｍの平板（プレート）状のＬＥＤ照明カバー用光拡散体（板状体）を製造した。 Next, the pellet-like light diffuser for LED lighting cover thus obtained was injection-molded at a temperature of 300 ° C. using an injection molding machine (manufactured by Nissei Plastic Industry Co., Ltd., model number “FNX140”). A light diffusing body (plate-shaped body) for a LED lighting cover having a diffusing agent content of 0.8% by weight and a thickness of 1 mm and a planar size of 50 mm × 50 mm was manufactured.
得られた平板状のＬＥＤ照明カバー用光拡散体について、波長３００ｎｍ〜８００ｎｍの分光透過率を測定した結果を図１に示す。得られた平板状のＬＥＤ照明カバー用光拡散体は、波長３００〜５００ｎｍの平均光透過率が０．７０％であり、波長６００〜８００ｎｍの平均光透過率が５６．８％であり、３００〜８００ｎｍの波長領域における光透過率のピークの波長が７８９ｎｍであった。また、得られた平板状のＬＥＤ照明カバー用光拡散体は、分散度（Ｄ５０）が４６．８°であった。 The result of having measured the spectral transmittance of wavelength 300nm-800nm about the obtained flat light diffusing material for LED lighting covers is shown in FIG. The obtained flat light diffuser for LED lighting cover has an average light transmittance of 0.70% at a wavelength of 300 to 500 nm, an average light transmittance of 56.8% at a wavelength of 600 to 800 nm, and 300 The peak wavelength of light transmittance in the wavelength region of ˜800 nm was 789 nm. Moreover, the obtained flat light diffuser for LED lighting cover had a dispersity (D50) of 46.8 °.
上記のペレット状のＬＥＤ照明カバー用光拡散体を用いて、図２に示す円筒形状のＬＥＤ照明カバー用光拡散体（厚み１ｍｍ）を押出成形法により作製した。市販の４０Ｗ型直管型ＬＥＤ照明装置（株式会社エレバム製、型番「ＦＷＫ４０ＮＳＭＳＰ５−７２Ｖ」、ＬＥＤチップの色温度が、カタログ値で５０００Ｋであり、前記測定方法による実測値で５１００Ｋであるもの）の本体（カバーを除いた部分）に前記円筒形状のＬＥＤ照明カバー用光拡散体を取り付けて、ＬＥＤ照明装置を作製した。 A cylindrical LED light cover light diffuser (thickness: 1 mm) shown in FIG. 2 was prepared by extrusion molding using the above pellet-shaped light diffuser for LED light cover. Commercially available 40W type straight tube type LED lighting device (manufactured by Elebum, model number “FWK40NSMSP5-72V”, LED chip color temperature is 5000K in the catalog value and 5100K in the actual measurement value by the measurement method) The cylindrical light diffuser for LED lighting cover was attached to the main body (portion excluding the cover) to produce an LED lighting device.
本参考例のＬＥＤ照明装置は、目視確認の結果、ＬＥＤチップの粒感がなく均一に発光していた。 As a result of visual confirmation, the LED illumination device of this reference example emitted light uniformly without the graininess of the LED chip.
また、本参考例のＬＥＤ照明カバー用光拡散体は、波長３００〜５００ｎｍの平均光透過率が５％以下であるため、屋外の果樹園、花木畑、菜園、食品工場等で使用される低誘虫照明装置や、半導体素子工場、特に感光性材料を扱う半導体素子工場内で使用される工場照明装置に用いられるＬＥＤ照明カバー用光拡散体として好適である。 Further, the light diffuser for LED lighting cover of this reference example has an average light transmittance of 5% or less at a wavelength of 300 to 500 nm, so that it is a low light used in outdoor orchards, flower gardens, vegetable gardens, food factories, etc. It is suitable as a light diffuser for an LED lighting cover used in an insect illuminating device or a factory lighting device used in a semiconductor device factory, particularly a semiconductor device factory handling photosensitive materials.
〔実施例２〕
光拡散剤として、シリコーン系樹脂粒子（「ガンツパール（登録商標）ＳＩ−０２０」）０．８重量部に代えて、シリコーン系樹脂粒子（「ガンツパール（登録商標）ＳＩ−０２０」）０．６５重量部、及び透明粒子である架橋（メタ）アクリル−スチレン共重合体粒子（メタクリル酸メチル４０重量％とスチレン５０重量％とジビニルベンゼン１０重量％とからなる単量体混合物の重合体、体積平均粒子径５．２μｍ、粒子径の変動係数３５．６％、屈折率１．５５５）０．５重量部を使用したこと以外は、参考例１と同様にしてＬＥＤ照明カバー用光拡散体（板状体）を製造した。
[Example 2]
As a light diffusing agent, instead of 0.8 parts by weight of silicone resin particles (“Gantzpearl (registered trademark) SI-020”), silicone resin particles (“Gantzpearl (registered trademark) SI-020”) 0. 65 parts by weight, and crosslinked (meth) acryl-styrene copolymer particles (a polymer of a monomer mixture composed of 40% by weight of methyl methacrylate, 50% by weight of styrene and 10% by weight of divinylbenzene, volume) A light diffusing material for an LED lighting cover (in the same manner as in Reference Example 1) except that 0.5 part by weight of an average particle size of 5.2 μm, a particle size variation coefficient of 35.6%, and a refractive index of 1.555) was used. Plate-like body) was produced.
得られた平板状のＬＥＤ照明カバー用光拡散体は、波長３００〜５００ｎｍの平均透過率が０．７８％、波長６００〜８００ｎｍの平均透過率が６１．２％、分散度（Ｄ５０）が４１．２°であった。また、本実施例で得られたＬＥＤ照明カバー用光拡散体を用いたこと以外は、参考例１と同様にしてＬＥＤ照明装置を作製し、目視したところ、ＬＥＤチップの粒感は無く、十分な明るさを有していた。 The obtained flat light diffuser for LED lighting cover has an average transmittance of 0.78% at a wavelength of 300 to 500 nm, 61.2% of an average transmittance at a wavelength of 600 to 800 nm, and a dispersity (D50) of 41. It was 2 °. Further, except that the light diffuser for LED lighting cover obtained in this example was used, an LED lighting device was prepared and visually observed in the same manner as in Reference Example 1. It had a good brightness.
〔実施例３〕
架橋（メタ）アクリル−スチレン共重合体粒子の量を０．５重量部から１．０重量部に変更したこと以外は実施例２と同様にして、ＬＥＤ照明カバー用光拡散体（板状体）を製造した。
Example 3
A light diffusing body for LED lighting cover (plate-like body) in the same manner as in Example 2 except that the amount of the crosslinked (meth) acryl-styrene copolymer particles was changed from 0.5 part by weight to 1.0 part by weight. ) Was manufactured.
得られた平板状のＬＥＤ照明カバー用光拡散体は、波長３００〜５００ｎｍの平均透過率が０．７５％、波長６００〜８００ｎｍの平均透過率が６０．３％、分散度（Ｄ５０）が４２．５°であった。また、本実施例で得られたＬＥＤ照明カバー用光拡散体を用いたこと以外は、参考例１と同様にしてＬＥＤ照明装置を作製し、目視したところ、ＬＥＤチップの粒感は無く、十分な明るさを有していた。 The obtained flat light diffuser for LED lighting cover has an average transmittance of 0.75% at a wavelength of 300 to 500 nm, an average transmittance of 60.3% at a wavelength of 600 to 800 nm, and a dispersity (D50) of 42. It was 5 °. Further, except that the light diffuser for LED lighting cover obtained in this example was used, an LED lighting device was prepared and visually observed in the same manner as in Reference Example 1. It had a good brightness.
〔参考例４〕
光拡散剤としてのシリコーン系樹脂粒子（「ガンツパール（登録商標）ＳＩ−０２０」）の量を０．８重量部から０．４重量部に変更したこと以外は、参考例１と同様にしてＬＥＤ照明カバー用光拡散体（板状体）を製造した。
[ Reference Example 4 ]
Except having changed the quantity of the silicone type resin particle ("Gantzpearl (trademark) SI-020") as a light-diffusion agent from 0.8 weight part to 0.4 weight part, it carried out similarly to the reference example 1, and. A light diffuser (plate-like body) for LED lighting cover was produced.
得られた平板状のＬＥＤ照明カバー用光拡散体は、波長３００〜５００ｎｍの平均透過率が０．８５％、波長６００〜８００ｎｍの平均透過率が７８．１％、分散度（Ｄ５０）が１６．３°であった。また、本参考例で得られたＬＥＤ照明カバー用光拡散体を用いたこと以外は、参考例１と同様にしてＬＥＤ照明装置を作製し、目視したところ、ＬＥＤチップの粒感がぼんやりと確認され、実施例２、３及び参考例１と比較して光拡散性が低かった。 The obtained flat light diffuser for LED lighting cover has an average transmittance of 0.85% at a wavelength of 300 to 500 nm, 78.1% of an average transmittance at a wavelength of 600 to 800 nm, and a dispersity (D50) of 16. It was 3 °. In addition, an LED lighting device was produced in the same manner as in Reference Example 1 except that the light diffusing body for LED lighting cover obtained in this Reference Example was used, and when visually observed, the graininess of the LED chip was confirmed to be dull. As compared with Examples 2 and 3 and Reference Example 1 , the light diffusibility was low.
〔参考例５〕
光拡散剤としてのシリコーン系樹脂粒子（「ガンツパール（登録商標）ＳＩ−０２０」）の量を０．８重量部から０．５重量部に変更したこと以外は、参考例１と同様にしてＬＥＤ照明カバー用光拡散体（板状体）を製造した。
[ Reference Example 5 ]
Except having changed the quantity of the silicone type resin particle ("Gantzpearl (trademark) SI-020") as a light-diffusion agent from 0.8 weight part to 0.5 weight part, it carried out similarly to the reference example 1, and. A light diffuser (plate-like body) for LED lighting cover was produced.
得られた平板状のＬＥＤ照明カバー用光拡散体は、波長３００〜５００ｎｍの平均透過率が０．８２％、波長６００〜８００ｎｍの平均透過率が７２．３％、分散度（Ｄ５０）が３６．１°であった。また、本参考例で得られたＬＥＤ照明カバー用光拡散体を用いたこと以外は、参考例１と同様にしてＬＥＤ照明装置を作製し、目視したところ、ＬＥＤチップの粒感がぼんやりと確認され、実施例２、３及び参考例１と比較して光拡散性が低かった。 The obtained flat light diffuser for LED lighting cover has an average transmittance of 0.82% at a wavelength of 300 to 500 nm, 72.3% of an average transmittance at a wavelength of 600 to 800 nm, and a dispersity (D50) of 36. It was 1 °. In addition, an LED lighting device was produced in the same manner as in Reference Example 1 except that the light diffusing body for LED lighting cover obtained in this Reference Example was used, and when visually observed, the graininess of the LED chip was confirmed to be dull. As compared with Examples 2 and 3 and Reference Example 1 , the light diffusibility was low.
〔比較例１〕
色素を使用しないこと以外は参考例１と同様にして、平板状のＬＥＤ照明カバー用光拡散体及びＬＥＤ照明装置を作製した。
[Comparative Example 1]
Except not using a pigment | dye, it carried out similarly to the reference example 1, and produced the light diffuser for LED lighting covers and LED lighting apparatus of the flat form.
得られた平板状のＬＥＤ照明カバー用光拡散体は、分散度（Ｄ５０）が４０°以上であり、光拡散性を実質的に有するものの、波長３００〜５００ｎｍの平均光透過率が５％を超えるため、低誘虫効果を持たなかった。 Although the obtained flat light diffuser for LED lighting cover has a dispersity (D50) of 40 ° or more and substantially has light diffusibility, the average light transmittance at a wavelength of 300 to 500 nm is 5%. Therefore, it did not have a low insecticidal effect.
〔比較例２〕
光拡散剤を使用しないこと以外は参考例１と同様にして、平板状のＬＥＤ照明カバー用光拡散体及びＬＥＤ照明装置を作製した。
[Comparative Example 2]
Except not using a light-diffusion agent, it carried out similarly to the reference example 1, and produced the light diffuser for LED lighting covers and LED lighting apparatus.
得られた平板状のＬＥＤ照明カバー用光拡散体は、波長３００〜５００ｎｍの平均光透過率が５％以下であり、低誘虫効果を有するものの、分散度（Ｄ５０）が２°以下であり、光拡散性を実質的に有さず、ＬＥＤ照明装置の点光源（ＬＥＤチップ）が視認された。 The obtained flat light diffuser for LED lighting cover has an average light transmittance of 5% or less at a wavelength of 300 to 500 nm and has a low pesticidal effect, but the dispersity (D50) is 2 ° or less, A point light source (LED chip) of the LED illumination device was visually recognized without substantially diffusing light.
〔低誘虫性の評価〕
実施例２・３、参考例１・４・５、及び比較例１・２のＬＥＤ照明装置、並びに比較対象としての市販の蛍光灯（直管形、昼光色、東芝ライテック株式会社製、型番「ＦＬ４０Ｓ・Ｄ」）のそれぞれについて、ＬＥＤ照明装置又は蛍光灯の後方に粘着シートを設置し、屋外で夜間（２夜）ＬＥＤ照明装置又は蛍光灯を灯火させた後、粘着シートに付着した虫を目視で観察した。実施例２のＬＥＤ照明装置、比較例１のＬＥＤ照明装置、及び市販の蛍光灯を用いた場合における２夜灯火後の粘着シートへの捕虫状況をそれぞれ図４、図５、及び図６に示す。
[Evaluation of low susceptibility]
LED lighting devices of Examples 2 and 3, Reference Examples 1 and 4 and Comparative Examples 1 and 2 , and commercially available fluorescent lamps for comparison (straight tube type, daylight color, manufactured by Toshiba Lighting & Technology Corporation, model number “FL40S”・ For each of “D”), an adhesive sheet is installed behind the LED lighting device or fluorescent lamp, and after lighting the LED lighting apparatus or fluorescent lamp outdoors at night (two nights), the insects attached to the adhesive sheet are visually observed. Observed at. FIG. 4, FIG. 5, and FIG. 6 show the state of insect trapping on the pressure-sensitive adhesive sheet after two night lamps when the LED lighting device of Example 2, the LED lighting device of Comparative Example 1, and a commercially available fluorescent lamp are used. .
図４及び図５から分かるように、実施例２のＬＥＤ照明装置を用いた場合には、比較例１のＬＥＤ照明装置を用いた場合と比べて捕虫数が少なく、特に蛾の捕虫がほとんど見られなかった。また、図４及び図６から分かるように、実施例２のＬＥＤ照明装置を用いた場合には、市販の蛍光灯を用いた場合と比べて、捕虫数が顕著に少なかった。 As can be seen from FIGS. 4 and 5, when the LED lighting device of Example 2 is used, the number of insects caught is smaller than when the LED lighting device of Comparative Example 1 is used. I couldn't. Moreover, as can be seen from FIGS. 4 and 6, when the LED illumination device of Example 2 was used, the number of insects caught was significantly smaller than when a commercially available fluorescent lamp was used.
実施例２・３、参考例１・４・５、及び比較例１・２の評価結果を表１にまとめて示す。 Table 1 summarizes the evaluation results of Examples 2 and 3, Reference Examples 1 and 4 and 5, and Comparative Examples 1 and 2.
表１に示す光拡散性の評価基準は、以下の通りである。
◎：ＬＥＤチップによる粒光感が確認されない。
△：ＬＥＤチップによる粒光感がぼんやりと確認される。
×：ＬＥＤチップの粒光感がはっきりと確認される。
The evaluation criteria of light diffusivity shown in Table 1 are as follows.
(Double-circle): The graininess by LED chip is not confirmed.
(Triangle | delta): The graininess feeling by a LED chip is confirmed obscurely.
X: The feeling of graininess of the LED chip is clearly confirmed.
表１に示す低誘虫性の評価基準は、以下の通りである。
◎：昼光色蛍光灯と比べ捕虫数が少なく、かつ蛾の捕虫がほとんどない。
△：昼光色蛍光灯と比べて捕虫数が少ないが、蛾が捕虫される。
×：昼光色蛍光灯での捕虫数と同等、蛾の捕中もある。
The evaluation criteria of the low susceptibility shown in Table 1 are as follows.
A: The number of insects is small compared to daylight fluorescent lamps, and there is almost no insect trapping.
Δ: The number of insects is small compared to daylight fluorescent lamps, but moths are caught.
X: Equivalent to the number of insects captured by daylight fluorescent lamps, and trapping moths.
表１に示す総合評価の評価基準は、以下の通りである。
◎：光拡散性及び低誘虫性の両方が◎である。
○：光拡散性が△、かつ低誘虫性が◎である。
△：光拡散性が◎又は△、かつ低誘虫性が△である。
×：光拡散性及び低誘虫性の少なくとも一方が×である。
The evaluation criteria for comprehensive evaluation shown in Table 1 are as follows.
A: Both the light diffusibility and the low susceptibility are A.
○: Light diffusibility is Δ and low susceptibility is ◎.
Δ: Light diffusivity is ◎ or Δ, and low susceptibility is Δ.
X: At least one of light diffusibility and low susceptibility is x.
表１に示す参考例１の評価結果と実施例２及び３の評価結果との比較から、本発明のＬＥＤ照明カバー用光拡散体において、光拡散剤としてシリコーン系樹脂粒子と（メタ）アクリル−スチレン共重合体粒子とを併用することで、光拡散剤としてシリコーン系樹脂粒子のみを使用した場合と比較して、分散度４０°以上の優れた光拡散性を維持しながら光透過率を向上させることができることが分かる。 From the comparison between the evaluation results of Reference Example 1 and the evaluation results of Examples 2 and 3 shown in Table 1, in the light diffuser for LED lighting cover of the present invention, silicone resin particles and (meth) acrylic- Combined with styrene copolymer particles, light transmittance is improved while maintaining excellent light diffusivity with a degree of dispersion of 40 ° or more compared to using only silicone resin particles as a light diffusing agent. You can see that
また、表１に示す実施例２、３及び参考例１の評価結果と、参考例４及び５の評価結果との比較から、本発明のＬＥＤ照明カバー用光拡散体において、波長６００〜８００ｎｍの平均光透過率を２０％以上７０％以下とすることで、波長６００〜８００ｎｍの平均光透過率が７０％超である場合と比較して光拡散性を向上させることができることが分かる。 Moreover, from the comparison between the evaluation results of Examples 2 and 3 and Reference Example 1 shown in Table 1 and the evaluation results of Reference Examples 4 and 5 , in the light diffuser for LED lighting cover of the present invention, the wavelength of 600 to 800 nm. It can be seen that by setting the average light transmittance to 20% or more and 70% or less, the light diffusibility can be improved as compared with the case where the average light transmittance at a wavelength of 600 to 800 nm is more than 70%.
〔分光放射照度の測定〕
参考例１及び比較例１のＬＥＤ照明装置について、波長３６０〜７８０ｎｍの分光放射照度を測定した。測定結果を図７に示す。図７より、参考例１のＬＥＤ照明装置では、比較例１のＬＥＤ照明装置と比較して、波長３６０〜５００ｎｍの放射照度を大きく低減できることが分かる。
[Measurement of spectral irradiance]
About the LED lighting apparatus of the reference example 1 and the comparative example 1, the spectral irradiance with a wavelength of 360-780 nm was measured. The measurement results are shown in FIG. From FIG. 7, it can be seen that the LED illumination device of Reference Example 1 can greatly reduce the irradiance with a wavelength of 360 to 500 nm as compared with the LED illumination device of Comparative Example 1.
〔実施例６〕
実施例２で使用した、ＬＥＤチップの色温度がカタログ値で５０００Ｋである市販の直管型ＬＥＤ照明装置の本体に代えて、ＬＥＤチップの色温度が、カタログ値で４０００Ｋであり、前記測定方法による実測値で３９４１Ｋである市販の直管型ＬＥＤ照明装置の本体を用いたこと以外は、実施例２と同様にしてＬＥＤ照明装置を作製した。
Example 6
The color temperature of the LED chip used in Example 2 is 4000 K as a catalog value instead of the main body of a commercially available straight tube LED lighting device whose catalog value is 5000 K as a catalog value. An LED lighting device was fabricated in the same manner as in Example 2 except that a main body of a commercially available straight tube type LED lighting device having an actual measurement value of 3941K was used.
〔実施例７〕
実施例２で使用した、ＬＥＤチップの色温度がカタログ値で５０００Ｋである市販の直管型ＬＥＤ照明装置の本体に代えて、ＬＥＤチップの色温度がカタログ値で３５００Ｋであり、前記測定方法による実測値で３４８６Ｋである市販の直管型ＬＥＤ照明装置の本体を用いたこと以外は、実施例２と同様にしてＬＥＤ照明装置を作製した。
Example 7
The color temperature of the LED chip used in Example 2 is 3500K in the catalog value instead of the main body of the commercially available straight tube type LED lighting device in which the color temperature of the LED chip is 5000K in the catalog value. An LED lighting device was manufactured in the same manner as in Example 2 except that the main body of a commercially available straight tube type LED lighting device having an actual measurement value of 3486K was used.
〔比較例３〕
比較例１で使用した、ＬＥＤチップの色温度がカタログ値で５０００Ｋである市販の直管型ＬＥＤ照明装置の本体に代えて、実施例６で使用した、ＬＥＤチップの色温度がカタログ値で４０００Ｋである市販の直管型ＬＥＤ照明装置の本体を用いたこと以外は、比較例１と同様にしてＬＥＤ照明装置を作製した。
[Comparative Example 3]
The color temperature of the LED chip used in Example 6 was 4000 K in the catalog value instead of the main body of the commercially available straight tube type LED lighting device used in Comparative Example 1 whose color temperature was 5000 K in the catalog value. An LED lighting device was produced in the same manner as Comparative Example 1 except that the main body of a commercially available straight tube type LED lighting device was used.
〔比較例４〕
比較例１で使用した、ＬＥＤチップの色温度がカタログ値で５０００Ｋである市販の直管型ＬＥＤ照明装置の本体に代えて、実施例７で使用した、ＬＥＤチップの色温度がカタログ値で３５００Ｋである市販の直管型ＬＥＤ照明装置の本体を用いたこと以外は、比較例１と同様にしてＬＥＤ照明装置を作製した。
[Comparative Example 4]
The color temperature of the LED chip used in Example 7 is 3500K in the catalog value instead of the main body of the commercially available straight tube type LED lighting device in which the color temperature of the LED chip used in Comparative Example 1 is 5000K in the catalog value. An LED lighting device was produced in the same manner as Comparative Example 1 except that the main body of a commercially available straight tube type LED lighting device was used.
〔分光放射照度の測定〕
実施例２・６・７及び比較例１・３・４のＬＥＤ照明装置について、波長３６０〜７８０ｎｍの分光放射照度、波長３６０〜７８０ｎｍの分光放射強度の積算値（Ａ）、及び波長３６０〜５００ｎｍの分光放射強度の積算値（Ｂ）を測定し、Ｂ／Ａの値を算出した。測定結果を図８〜１０及び表２に示す。図８〜１０より、実施例２・６・７のＬＥＤ照明装置では、比較例１・３・４のＬＥＤ照明装置と比較して、波長３６０〜５００ｎｍの放射照度を大きく低減できることが分かる。
[Measurement of spectral irradiance]
For the LED lighting devices of Examples 2, 6, and 7 and Comparative Examples 1, 3, and 4, the spectral irradiance at a wavelength of 360 to 780 nm, the integrated value (A) of the spectral radiation intensity at a wavelength of 360 to 780 nm, and the wavelength of 360 to 500 nm The integrated value (B) of the spectral radiant intensity was measured, and the value of B / A was calculated. The measurement results are shown in FIGS. 8 to 10, it can be seen that the LED illumination devices of Examples 2, 6, and 7 can greatly reduce the irradiance at wavelengths of 360 to 500 nm as compared with the LED illumination devices of Comparative Examples 1, 3, and 4.
図８〜１０及び表２より、実施例２・６・７のＬＥＤ照明装置は、５００ｎｍより波長が長い領域に分光放射照度のピークを有し、かつ波長３６０〜５００ｎｍの分光放射強度の積算値が、波長３６０ｎｍ〜７８０ｎｍの分光放射強度の積算値に対し１／１０以下（かつ１／１００以下）であるのに対し、比較例１・３・４のＬＥＤ照明装置は、５００ｎｍより波長が短い領域に分光放射照度のピークを有し、かつ波長３６０〜５００ｎｍの分光放射強度の積算値が、波長３６０ｎｍ〜７８０ｎｍの分光放射強度の積算値に対し１／１０超であることが分かる。実施例２のＬＥＤ照明装置は、波長の短い３６０ｎｍ〜５００ｎｍの分光放射照度の積算値が十分に小さいために、波長の短い光に寄り易い虫（特に蛾）の誘引を低減することができたのに対し、比較例１のＬＥＤ照明装置は、波長の短い３６０ｎｍ〜５００ｎｍの分光放射照度の積算値が大きいために、波長の短い光に寄り易い虫（特に蛾）の誘引を低減することができなかったものと考えられる。 8 to 10 and Table 2, the LED illumination devices of Examples 2, 6 and 7 have a peak of spectral irradiance in a region where the wavelength is longer than 500 nm, and an integrated value of spectral radiant intensity at a wavelength of 360 to 500 nm. However, it is 1/10 or less (and 1/100 or less) of the integrated value of the spectral radiant intensity at wavelengths of 360 nm to 780 nm, whereas the LED illumination devices of Comparative Examples 1, 3, and 4 have a wavelength shorter than 500 nm. It can be seen that the spectral irradiance has a peak in the region, and the integrated value of the spectral radiant intensity at a wavelength of 360 to 500 nm is more than 1/10 of the integrated value of the spectral radiant intensity at a wavelength of 360 nm to 780 nm. Since the integrated value of the spectral irradiance of 360 nm to 500 nm with a short wavelength is sufficiently small, the LED lighting device of Example 2 was able to reduce the attraction of insects (especially moths) that tend to approach light with a short wavelength. On the other hand, since the LED illumination device of Comparative Example 1 has a large integrated value of spectral irradiance of 360 nm to 500 nm with a short wavelength, it can reduce the attraction of insects (especially moths) that tend to approach light with a short wavelength. It is thought that it was not possible.
図８・９及び表２より、ＬＥＤチップの色温度を４０００Ｋ以下とすることで、波長の短い３６０ｎｍ〜５００ｎｍの分光放射照度の積算値をより小さくすることができ、特に波長４５０ｎｍのピークを小さくすることができることが分かる。したがって、ＬＥＤチップの色温度を４０００Ｋ以下とすることで、波長の短い光に寄り易い虫（例えば蛾）の誘引をさらに低減することができると考えられる。 From FIGS. 8 and 9 and Table 2, by setting the color temperature of the LED chip to 4000 K or less, the integrated value of the spectral irradiance of 360 nm to 500 nm with a short wavelength can be made smaller, especially the peak at the wavelength of 450 nm is made smaller. You can see that you can. Therefore, it is considered that the attraction of insects (for example, moths) that tend to approach light with a short wavelength can be further reduced by setting the color temperature of the LED chip to 4000 K or less.
Claims (10)
前記光拡散剤がシリコーン系樹脂粒子と（メタ）アクリル−スチレン共重合体粒子とを含み、
前記ＬＥＤ照明カバー用光拡散体が厚さ１ｍｍの板状体に成形されたときに、波長３００〜５００ｎｍの平均光透過率が５％以下であり、波長６００〜８００ｎｍの平均光透過率が２０％以上７０％以下であることを特徴とするＬＥＤ照明カバー用光拡散体。 A light diffusing body for an LED lighting cover comprising a base resin, a light diffusing agent, and a pigment that cuts at least part of light in a wavelength region of 300 to 500 nm,
The light diffusing agent includes silicone resin particles and (meth) acryl-styrene copolymer particles,
When the LED illuminating cover light diffuser is molded into a plate having a thickness of 1 mm, the average light transmittance at a wavelength of 300 to 500 nm is 5% or less and the average light transmittance at a wavelength of 600 to 800 nm is 20%. A light diffusing body for an LED lighting cover, wherein the light diffusing body is at least 70% and at most 70% .
前記基材樹脂が、ポリカーボネート系樹脂であることを特徴とするＬＥＤ照明カバー用光拡散体。 The light diffuser for LED lighting cover according to claim 1 ,
The light diffuser for an LED lighting cover, wherein the base resin is a polycarbonate resin.
前記ＬＥＤ照明カバー用光拡散体が厚さ１ｍｍの板状体に成形されたときに、分散度が４０°以上であることを特徴とするＬＥＤ照明カバー用光拡散体。The LED light cover light diffuser, wherein the LED light cover light diffuser has a degree of dispersion of 40 ° or more when formed into a 1 mm thick plate-like body.
半導体素子工場内のＬＥＤ照明装置のＬＥＤ照明カバーに用いられることを特徴とするＬＥＤ照明カバー用光拡散体。 The light diffusing body for an LED lighting cover according to any one of claims 1 to 3 ,
A light diffuser for an LED lighting cover, which is used for an LED lighting cover of an LED lighting device in a semiconductor element factory.
低誘虫ＬＥＤ照明装置のＬＥＤ照明カバーに用いられることを特徴とするＬＥＤ照明カバー用光拡散体。 The light diffusing body for an LED lighting cover according to any one of claims 1 to 3 ,
A light diffusing body for an LED lighting cover, which is used for an LED lighting cover of a low-attraction LED lighting device.
害虫防除用ＬＥＤ照明装置のＬＥＤ照明カバーに用いられることを特徴とするＬＥＤ照明カバー用光拡散体。 The light diffusing body for an LED lighting cover according to any one of claims 1 to 3 ,
A light diffuser for an LED lighting cover, which is used for an LED lighting cover of an LED lighting device for controlling pests.
波長３６０〜５００ｎｍの分光放射強度の積算値が、波長３６０ｎｍ〜７８０ｎｍの分光放射強度の積算値に対し１／１０以下であることを特徴とするＬＥＤ照明装置。 The LED lighting device according to claim 7 ,
An LED illumination device, wherein an integrated value of spectral radiation intensity at a wavelength of 360 to 500 nm is 1/10 or less of an integrated value of spectral radiation intensity at a wavelength of 360 nm to 780 nm.
色温度が４０００Ｋ以下であるＬＥＤチップを備えることを特徴とするＬＥＤ照明装置。 The LED lighting device according to claim 7 or 8 ,
An LED lighting device comprising an LED chip having a color temperature of 4000K or less.
害虫防除用であることを特徴とするＬＥＤ照明装置。 The LED lighting device according to any one of claims 7 to 9 ,
An LED lighting device for controlling pests.
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