JP2000067629A - Lighting cover - Google Patents
Lighting coverInfo
- Publication number
- JP2000067629A JP2000067629A JP10253316A JP25331698A JP2000067629A JP 2000067629 A JP2000067629 A JP 2000067629A JP 10253316 A JP10253316 A JP 10253316A JP 25331698 A JP25331698 A JP 25331698A JP 2000067629 A JP2000067629 A JP 2000067629A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- lighting cover
- thickness
- ultraviolet absorber
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、特定の波長以下の
光をカットすることにより、防虫効果を付与した樹脂製
照明カバーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin lighting cover provided with an insect repellent effect by cutting light of a specific wavelength or less.
【０００２】[0002]
【従来の技術】昆虫類、蛾類などは、夜間照明灯、信号
灯等の各種の光に引き寄せられやすく、屋外では特に顕
著であるが、室内に入ってくる昆虫類、蛾類などは非常
に煩わしく、かつ非衛生的である。昆虫類、蛾類の誘引
効果をなくす方法として、照明カバーが特定の波長の光
をカットする方法、昆虫類の忌避物質を含有させる方法
などが知られている。2. Description of the Related Art Insects and moths are easily attracted to various lights such as night lights and signal lights, and are particularly remarkable outdoors. Bothersome and unsanitary. As a method for eliminating the attracting effect of insects and moths, a method of cutting off light of a specific wavelength by a lighting cover, a method of containing an insect repellent, and the like are known.
【０００３】前者の例としては、特公昭６２−４１５４
１号公報には、３７０ｎｍ以下の光の透過率を下げたフ
ィルムを照明カバーに用いる例、特開平８−３１５７７
８号公報には４００ｎｍ以下の短波長を吸収する蛍光灯
管被覆材料、特開平９−４７２１５号公報には特定微粉
砕顔料を混入し、短波長から可視光の範囲の透過率をコ
ントロールする例などが知られている。さらには、短波
長の光の吸収剤を含むコーティング液を、照明カバーに
塗布する方法も公知である。照明カバーではないが、特
開昭５４−９７２７３号公報の様に、３７０ｎｍ以下の
光の透過を阻止した農業用被覆材なども、昆虫類の誘引
効果を下げる方法の例として知られている。An example of the former is disclosed in Japanese Patent Publication No. Sho 62-4154.
JP-A-8-31577 discloses an example in which a film having a reduced transmittance of light of 370 nm or less is used for an illumination cover.
No. 8 discloses a fluorescent lamp tube coating material absorbing short wavelengths of 400 nm or less, and JP-A-9-47215 discloses an example in which a specific finely pulverized pigment is mixed to control the transmittance in the range from short wavelength to visible light. Etc. are known. Furthermore, a method of applying a coating solution containing a short wavelength light absorber to a lighting cover is also known. Agricultural covering materials that are not illumination covers but block transmission of light of 370 nm or less, such as JP-A-54-97273, are also known as examples of a method for reducing the effect of attracting insects.
【０００４】また、後者の例としては、特開昭６２−４
８７６４号公報の様に、昆虫阻害用のワサビやニンニク
などの臭気物資を含有させる方法が知られている。[0004] An example of the latter is disclosed in Japanese Patent Application Laid-Open No. 62-4 / 1987.
As disclosed in Japanese Patent No. 8764, a method for containing odorous substances such as wasabi and garlic for inhibiting insects is known.
【０００５】昆虫類の可視領域は、ヒトの可視領域が４
００〜７００ｎｍであるのに対し、凡そ２５０〜６００
ｎｍの範囲であり、特に３００〜４００ｎｍの短波長領
域における感度が高いことは公知である。従って上記の
先行技術の様に、短波長領域の光の透過率を下げること
は、昆虫類の誘引効果を下げる目的に対して非常に有効
である。[0005] The visible range of insects is four human.
About 250 to 600 nm,
It is known that the sensitivity is high in the short wavelength range of 300 to 400 nm. Therefore, lowering the transmittance of light in the short wavelength region as in the above-described prior art is very effective for the purpose of reducing the effect of attracting insects.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前記特
公昭６２−４１５４１号公報にはフィルム材料として、
ポリカーボネートやポリエステル系など樹脂のフィルム
を用いる例が開示されているが、この方法では防虫効果
を出すためには、紫外線吸収剤などの低波長吸収剤を、
数パーセントオーダーの高濃度に添加する必要があり、
このように高濃度の紫外線吸収剤を含有した樹脂組成物
からのフィルムの製造は困難になる。また、フィルム単
体による照明カバーの使用は困難なので、基材である照
明カバーに接着材などで張り合せなければならない。However, the above-mentioned Japanese Patent Publication No. Sho 62-41541 discloses a film material.
Although an example using a resin film such as polycarbonate or polyester is disclosed, in order to obtain an insect repellent effect in this method, a low wavelength absorber such as an ultraviolet absorber,
It needs to be added to a high concentration of several percent order,
Thus, it becomes difficult to produce a film from a resin composition containing a high concentration of an ultraviolet absorber. In addition, since it is difficult to use a lighting cover made of a single film, it is necessary to bond the lighting cover as a base material with an adhesive or the like.
【０００７】コーティング液による場合も、フィルムに
添加する場合と同様に、紫外線吸収剤など低波長吸収剤
を、数パーセントオーダーの高濃度に添加混合する必要
があり、また、塗膜を厚くせざるを得ない。さらに、照
明カバーを作り上げた後に塗布するというように、一工
程増やさざるを得ない。[0007] In the case of using a coating solution, it is necessary to add and mix a low-wavelength absorber such as an ultraviolet absorber to a high concentration of a few percent, as in the case of adding to a film, and it is necessary to thicken the coating film. Not get. In addition, it is inevitable to increase the number of steps by one, such as applying the light after the lighting cover is formed.
【０００８】上記特開平９−４７２１５号公報に開示さ
れている特定の顔料の微粉砕品を混合するという方法で
は、可視光領域の光透過率にも影響が出てくるため、樹
脂が着色されてしまう。室内で使用される照明カバーは
白色、乳白色が大半であり、透過光および反射光に特定
の色が付くことは実用上問題である。In the method disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-47215, in which a finely pulverized product of a specific pigment is mixed, the light transmittance in the visible light region is affected, so that the resin is colored. Would. Most of the lighting covers used indoors are white and milky white, and it is a practical problem that a specific color is imparted to the transmitted light and the reflected light.
【０００９】また、ワサビ、ニンニク、ニラ、レモンな
どの臭気物質を添加することは、一時的には効果がある
と思われるが、臭気物質は、長期的には拡散してしまう
ため、実用には供さない。[0009] The addition of odorous substances such as wasabi, garlic, chive, lemon and the like seems to be effective temporarily, but the odorous substances are diffused in the long term, so that they are not practical. Do not offer.
【００１０】以上のように、従来よりある照明カバー用
材料では、紫外線吸収剤が含まれているものの樹脂材料
の黄変または強度等の劣化を防ぐために添加されている
程度であり、照明カバーから透過する光に誘引された昆
虫類が照明カバー中に入り込み、ショートの原因となっ
たり、昆虫類の死骸が照明カバー中に溜まり清潔上また
は衛生上および外観上好ましくない。As described above, the conventional lighting cover material contains an ultraviolet absorber, but is added to prevent the resin material from yellowing or deteriorating the strength and the like. Insects attracted by the transmitted light enter the lighting cover and cause a short circuit, and dead insects accumulate in the lighting cover, which is not preferable for cleanliness, hygiene and appearance.
【００１１】一般に、樹脂板から製造される照明カバー
は、樹脂板の真空成形、圧空成形またはプレス成形等に
より成形延伸されるため、成形延伸後の照明カバーの板
厚分布は偏肉化が避けられない。成形により延伸された
部分は、元板厚より肉厚が薄くなるため、紫外線吸収の
効果が延伸で板厚が薄くなった分、効果が低減してしま
う。これを防ぐ目的で、元板中の紫外線吸収剤濃度を増
加させると黄色味が強くなってしまうという問題点があ
る。In general, a lighting cover manufactured from a resin plate is formed and stretched by vacuum forming, pressure forming, press forming or the like of the resin plate. I can't. Since the portion stretched by molding is thinner than the original plate thickness, the effect of ultraviolet absorption is reduced by the extent that the plate thickness is reduced by stretching. If the concentration of the ultraviolet absorbent in the base plate is increased for the purpose of preventing this, there is a problem that the yellow tint becomes strong.
【００１２】したがって本発明の目的は、昆虫類を誘引
しない樹脂製照明カバーを提供することにある。さら
に、樹脂板から成形される照明カバーが成形によって板
厚が薄くなっても昆虫類の誘引効果が発生せず、しかも
紫外線吸収剤による樹脂の着色のない樹脂製の照明カバ
ーを提供することにある。Accordingly, an object of the present invention is to provide a resin lighting cover that does not attract insects. Furthermore, even if a lighting cover formed from a resin plate is reduced in thickness by molding, an insect attracting effect does not occur, and a resin lighting cover without coloring of the resin by an ultraviolet absorber is provided. is there.
【００１３】[0013]
【課題を解決するための手段】本発明は、前述の問題点
に鑑み、照明カバーへの昆虫類の誘引効果を下げるため
に短波長域の光を吸収する紫外線吸収剤の種類および添
加量について検討したところ、樹脂中に存在させる紫外
線吸収剤の量を樹脂に黄色味を発生させない範囲内の添
加量とし、さらに、乳白色の樹脂板を照明カバーとする
ことによって、防虫照明カバーの製造加工工程の増加
や、照明カバーの着色、成形延伸による板厚の薄肉化に
よる紫外線吸収効果の低減等の問題点を解決できること
を見出したものである。SUMMARY OF THE INVENTION In view of the foregoing problems, the present invention relates to the type and amount of an ultraviolet absorber that absorbs light in a short wavelength range in order to reduce the effect of attracting insects to a lighting cover. After examination, the amount of the ultraviolet absorber to be present in the resin was determined to be an addition amount within a range that does not cause yellowing of the resin, and further, by using a milky white resin plate as the lighting cover, the process of manufacturing the insect-proof lighting cover was performed. It has been found that problems such as an increase in the thickness of the lighting cover, coloring of the lighting cover, and a reduction in the ultraviolet absorption effect due to a reduction in the thickness of the plate due to forming and stretching can be solved.
【００１４】本発明は、照明カバーの厚み方向における
波長３７０ｎｍ以下の光の透過率が１％以下である樹脂
製照明カバーにある。The present invention resides in a resin illumination cover having a transmittance of 1% or less for light having a wavelength of 370 nm or less in the thickness direction of the illumination cover.
【００１５】さらに本発明は、上記発明において、樹脂
製照明カバーを構成する樹脂材料が吸収波長３４０〜３
８０ｎｍの範囲の紫外線吸収剤を含有する発明、その含
有量が樹脂材料よりなる樹脂板を照明カバーに成形する
際に該樹脂板の元板厚の１／３〜１／５厚みになっても
上記光の透過率を維持すると共に、かつ、樹脂材料に黄
帯色を与えない樹脂製の照明カバーにある。Further, according to the present invention, in the above-mentioned invention, the resin material constituting the resin-made illumination cover has an absorption wavelength of 340-3.
Invention containing an ultraviolet absorber in the range of 80 nm, even when the content thereof becomes 1/3 to 1/5 of the original thickness of the resin plate when the resin plate made of a resin material is formed into a lighting cover. A lighting cover made of resin that maintains the light transmittance and does not impart yellowish color to the resin material.
【００１６】また本発明は、照明カバーの厚み方向にお
ける可視光線透過率が３０〜６０％の範囲の乳白色アク
リル樹脂を用いた樹脂製照明カバーにある。The present invention also resides in a resin lighting cover using a milky white acrylic resin having a visible light transmittance in the thickness direction of the lighting cover in the range of 30 to 60%.
【００１７】[0017]
【発明の実施の形態】本発明は、照明カバーの厚み方向
における波長３７０ｎｍ以下の光の透過率が１％以下で
ある樹脂製の照明カバーである。ここで波長３７０ｎｍ
以下の光の透過率が１％を超える場合は、本発明の目的
とする優れた防虫効果が期待できない。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a resin-made lighting cover having a transmittance of 1% or less for light having a wavelength of 370 nm or less in a thickness direction of the lighting cover. Here, the wavelength is 370 nm
When the following light transmittance exceeds 1%, the excellent insect repellent effect aimed at by the present invention cannot be expected.
【００１８】本発明において、波長３７０ｎｍ以下の光
の透過率が１％以上の樹脂製照明カバーは特定の波長域
の光をカットする紫外線吸収剤を添加することによって
得られる。特定波長域の光をカットする紫外線吸収剤と
しては、紫外線吸収能力と紫外線吸収剤添加による樹脂
の黄帯色の程度および防虫効果を付与させるに必要な添
加量より決められ、その添加量は樹脂材料の厚み、紫外
線吸収剤添加による黄帯色の程度、紫外線吸収剤の紫外
線吸収能力により決められる。In the present invention, a resin illumination cover having a transmittance of 1% or more for light having a wavelength of 370 nm or less can be obtained by adding an ultraviolet absorber for cutting light in a specific wavelength range. The ultraviolet absorber that cuts light in a specific wavelength range is determined by the ultraviolet absorption ability, the degree of yellowish color of the resin due to the addition of the ultraviolet absorber, and the amount required to impart insect repellency, and the amount of the resin added is It is determined by the thickness of the material, the degree of yellowish color due to the addition of the ultraviolet absorber, and the ultraviolet absorption capacity of the ultraviolet absorber.
【００１９】本発明における樹脂製照明カバーを構成す
る樹脂材料に添加する紫外線吸収剤は、波長３４０〜３
８０ｎｍの範囲に吸収波長ピークのあるものが好まし
い。ここで、吸収波長ピークが波長３４０ｎｍ未満の紫
外線吸収剤では、元板厚の１／３〜１／５厚みに成形延
伸された場合、波長３７０ｎｍ以下の光の透過率を１％
以下とするのが困難となり、優れた防虫効果が得られな
いか、あるいは紫外線吸収剤の添加量が多量に必要とな
りコスト高が懸念される。The ultraviolet absorber to be added to the resin material constituting the resin lighting cover according to the present invention has a wavelength of 340-3.
Those having an absorption wavelength peak in the range of 80 nm are preferred. Here, in the case of an ultraviolet absorbent having an absorption wavelength peak of less than 340 nm, the transmittance of light having a wavelength of 370 nm or less can be reduced by 1% when molded and stretched to 1/3 to 1/5 of the original plate thickness.
It is difficult to achieve the following, and an excellent insect repellent effect cannot be obtained, or a large amount of an ultraviolet absorber needs to be added, which may increase the cost.
【００２０】また、吸収波長ピークが波長３８０ｎｍを
超える紫外線吸収剤では、防虫効果を得るために必要な
添加量では、樹脂に黄帯色を生じ、乳白色あるいは白色
を好む照明カバーへの使用は好ましくない。Further, in the case of an ultraviolet absorber having an absorption wavelength peak exceeding 380 nm, it is preferable to use it for a lighting cover which gives a yellowish color to the resin and has a milky or white color if the amount of addition is necessary to obtain the insect repellent effect. Absent.
【００２１】３４０〜３８０ｎｍに吸収波長ピークを持
つ紫外線吸収剤の種類としては、ベンゾトリアゾール
系、ベンゾフェノン系などが挙げられる。これらの化合
物としては、２，２′−ジヒドロキシ−４−メトキシベ
ンゾフェノンあるいは、２，２′−ジヒドロキシ−４，
４′−ジメトキシベンゾフェノン、２，２′，４，４′
−テトラヒドロキシ−ベンゾフェノン、２−（２′−ヒ
ドロキシ−３′−ｔ−ブチル−５′−メチルフェニル）
−５−クロロベンゾトリアゾール、２−（２′−ヒドロ
キシ−３′，５′−ジ−ｔ−ブチルフェニル）−５−ク
ロロベンゾトリアゾール、２−（２′−ヒドロキシ−
４′−オクトキシフェニル）ベンゾトリアゾールが好ま
しく、これらは単体あるいは２種以上の混合物として樹
脂に添加される。Examples of the type of the ultraviolet absorber having an absorption wavelength peak at 340 to 380 nm include a benzotriazole type and a benzophenone type. These compounds include 2,2'-dihydroxy-4-methoxybenzophenone or 2,2'-dihydroxy-4,
4'-dimethoxybenzophenone, 2,2 ', 4,4'
-Tetrahydroxy-benzophenone, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl)
-5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-t-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-
4'-Octoxyphenyl) benzotriazole is preferred, and these are added to the resin alone or as a mixture of two or more.
【００２２】樹脂板より照明カバーを製造するに当っ
て、通常、その成形方法は真空成形法、圧空成形法、プ
レス成形法等により製造されるため、照明カバーの肉厚
は成形時延伸により偏肉化しやすく、最も延伸される個
所（成形時に樹脂板が成形型に最も遅く当たる個所）、
つまり、最も板厚が薄くなる個所は、元の板厚の１／３
〜１／５の厚みとなる。そのため充分な紫外線吸収効果
を得るためには、肉厚が薄くなるにしたがって紫外線吸
収剤の添加量を増加させる必要がある。In manufacturing a lighting cover from a resin plate, usually, the forming method is a vacuum forming method, a pressure forming method, a press forming method, or the like. It is easy to flesh and the most stretched point (where the resin plate hits the mold at the latest time during molding),
In other words, the place where the plate thickness becomes the thinnest is 1/3 of the original plate thickness.
厚 み of thickness. Therefore, in order to obtain a sufficient ultraviolet absorbing effect, it is necessary to increase the amount of the ultraviolet absorber added as the thickness becomes thinner.
【００２３】たとえば、元板厚２ｍｍの樹脂板では、延
伸率の高い場合で０．４ｍｍ（元板厚の１／５）、延伸
率の低い場合で０．７ｍｍ（元板厚の１／３）程度とな
るため、添加される紫外線吸収剤の濃度も１／５〜１／
３となる。すなわち、紫外線吸収剤の濃度がこのように
低下すると紫外線吸収効果および防虫効果の低減となる
ので、紫外線吸収剤の添加量を増加する必要がある。し
かしながら、紫外線吸収剤の添加量を増加させると吸収
波長域が長波長域にシフトするため、樹脂に黄色味が目
立つようになる。このような観点から波長３４０〜３８
０ｎｍの範囲に吸収波長ピークを有する紫外線吸収剤の
樹脂に対する添加量Ａ（重量％）は、下記式（１）で表
される範囲が好ましい。For example, in the case of a resin plate having an original plate thickness of 2 mm, 0.4 mm (５ of the original plate thickness) when the stretching ratio is high, and 0.7 mm (１ ／ of the original plate thickness) when the stretching ratio is low. ), The concentration of the added ultraviolet absorber is also 1/5 to 1 /
It becomes 3. That is, if the concentration of the ultraviolet absorber is decreased in this manner, the ultraviolet absorption effect and the insect repellent effect are reduced, so that it is necessary to increase the amount of the ultraviolet absorber added. However, when the amount of the ultraviolet absorber added is increased, the absorption wavelength range shifts to a longer wavelength range, and the resin becomes yellowish. From such a viewpoint, the wavelengths 340 to 38
The addition amount A (% by weight) of the ultraviolet absorber having an absorption wavelength peak in the range of 0 nm to the resin is preferably in the range represented by the following formula (1).
【００２４】[0024]
【数３】 (Equation 3)
【００２５】上記式（１）において、Ｙは成形延伸後の
板厚（ｍｍ）を示し、その範囲は、元板厚をＸ（ｍｍ）
とすると下記式（２）で示される範囲で表される。In the above formula (1), Y represents the thickness (mm) of the sheet after forming and stretching.
Then, it is expressed in the range represented by the following equation (2).
【数４】 (Equation 4)
【００２６】上記式（１）において紫外線吸収剤の樹脂
に対する添加量Ａ（重量％）が０．０８／Ｙより少い
と、成形延伸において板厚が元板厚の１／３〜１／５と
薄くなり、波長３７０ｎｍ以下の光の透過率が１％以下
を維持することが困難となるため本発明の目的である優
れた防虫効果が得られない。また、添加量Ａ（重量％）
が０．８／Ｙを超えると可視光線域の吸収が多くなり、
樹脂材料が黄色味を帯び易くなり、乳白色および白色を
好むカバー用途においては好ましくない。In the above formula (1), when the addition amount A (% by weight) of the ultraviolet absorber to the resin is less than 0.08 / Y, the sheet thickness in the forming and stretching is 1/3 to 1/5 of the original sheet thickness. As a result, it becomes difficult to maintain the transmittance of light having a wavelength of 370 nm or less at 1% or less, so that the excellent insect repellent effect, which is the object of the present invention, cannot be obtained. In addition, addition amount A (% by weight)
Exceeds 0.8 / Y, absorption in the visible light region increases,
The resin material tends to take on a yellow tint, which is not preferable in cover applications that prefer milky white and white.
【００２７】樹脂中の紫外線吸収剤の添加量Ａ（重量
％）が０．８／Ｙ付近においては、黄色味がわずかに確
認される場合があるため、ブルーイング剤、蛍光増白剤
を単独あるいは併用して添加することにより、黄色味を
抑制することができる。ブルーイング剤としては、青色
染料が用いられる。When the addition amount A (% by weight) of the ultraviolet absorber in the resin is around 0.8 / Y, a slight yellow tint may be observed, so that the bluing agent and the fluorescent whitening agent are used alone. Alternatively, by adding in combination, the yellow tint can be suppressed. A blue dye is used as a bluing agent.
【００２８】青色染料としては、ダイヤレジンＫ、ダイ
ヤレジンブルーＮ、ダイヤレジンブルーＧ（以上三菱化
学（株）製）、アマプラストブルーＯＲ（アメリカン・
アニリン社製）、マイクロリスブルーＧＳＴ、マイクロ
リスブルー４ＧＴ（チバガイギイ社製）等が挙げられ、
その添加量は、樹脂１００重量部に対し５×１０-6〜５
×１０-4重量部、好ましくは１×１０-5〜２×１０-4重
量部である。Examples of blue dyes include Diamond Resin K, Diamond Resin Blue N, Diamond Resin Blue G (all manufactured by Mitsubishi Chemical Corporation), and Amaplast Blue OR (American
Aniline), Microlith Blue GST, Microlith Blue 4GT (Cibagaigii) and the like,
The addition amount is 5 × 10 −6 to 5 parts per 100 parts by weight of the resin.
× 10 -4 parts by weight, preferably 1 × 10 -5 to 2 × 10 -4 parts by weight.
【００２９】また、蛍光増白剤としては、ハッコール
（昭和化学（株）製、商品名）、ユビテックス（チバガ
イギイ社製、商品名）、ホスタルクス（ＢＡＳＦ社製、
商品名）、イルミナール（昭和化工（株）製、商品名）
等が挙げられ、その添加量は樹脂１００重量部に対し、
５×１０-5〜０．１重量部、好ましくは５×１０-4〜
０．０５重量部である。Examples of the fluorescent whitening agent include Hakkor (trade name, manufactured by Showa Kagaku Co., Ltd.), Ubitex (trade name, manufactured by Ciba Gaigii Co., Ltd.), and Hostalx (trade name, manufactured by BASF Corp.)
(Product name), Illuminar (product name, manufactured by Showa Kako Co., Ltd.)
And the like, the amount of which is added to 100 parts by weight of the resin,
5 × 10 −5 to 0.1 part by weight, preferably 5 × 10 −4 to
0.05 parts by weight.
【００３０】また樹脂材料には、耐光性を向上させるた
めに耐光安定剤としてヒンダートアミン等を添加するこ
ともできる。ヒンダートアミン系安定剤としては、サノ
ールＬＳ７７０、サノールＬＳ７６５（三共（株）製、
商品名）、アデカスタブＬＡ−７７、アデカスタブＬＡ
−５７（旭電化（株）製、商品名）等が挙げられ、添加
量としては樹脂１００重量部に対し０．０１〜１．０重
量部、好ましくは０．０５〜０．５重量部である。Further, a hindered amine or the like can be added to the resin material as a light-resistant stabilizer in order to improve the light resistance. Examples of the hindered amine-based stabilizer include Sanol LS770 and Sanol LS765 (manufactured by Sankyo Co., Ltd.)
ADK STAB LA-77, ADK STAB LA
-57 (trade name, manufactured by Asahi Denka Co., Ltd.) and the like. The amount of addition is 0.01 to 1.0 part by weight, preferably 0.05 to 0.5 part by weight, per 100 parts by weight of the resin. is there.
【００３１】本発明において用いられる樹脂材料は、ア
クリル樹脂、ポリカーボネート樹脂、塩化ビニル樹脂、
ポリスチレン樹脂、ポリエステル樹脂などが挙げられる
が、これらの共重合体でも構わない。中でも透明性、耐
光性の良好なアクリル樹脂がもっとも好ましい。アクリ
ル樹脂としては、メチルメタクリレート単独あるいはこ
れとメチルアクリレート、ブチルアクリレート、エチル
ヘキシルアクリレート等のアクリレート類との共重合物
であってもよい。The resin material used in the present invention is an acrylic resin, a polycarbonate resin, a vinyl chloride resin,
Polystyrene resin, polyester resin and the like can be mentioned, but these copolymers may be used. Among them, an acrylic resin having good transparency and light resistance is most preferable. The acrylic resin may be methyl methacrylate alone or a copolymer thereof with acrylates such as methyl acrylate, butyl acrylate, and ethylhexyl acrylate.
【００３２】一般に照明カバーは、光源の光を拡散させ
るために白色顔料が添加されており、その白色顔料を添
加した乳白色樹脂からなる照明カバーの可視光線透過率
は３０〜６０％であることが好ましい。In general, a white pigment is added to a lighting cover to diffuse light from a light source, and the visible light transmittance of a lighting cover made of a milky white resin to which the white pigment is added may be 30 to 60%. preferable.
【００３３】乳白色樹脂とするために樹脂材料に添加さ
れる白色顔料としては、酸化チタン、酸化バリウム、タ
ルク、硫酸バリウム、水酸化アルミニウム、シリカ、マ
イカ、炭酸カルシウム、硫酸カルシウム、クレーなどの
無機系顔料およびポリマービーズなどの有機系顔料が挙
げられる。これらの中では硫酸バリウム、炭酸カルシウ
ム、酸化チタンが好ましい。これら白色顔料は、単独あ
るいは２種以上組み合わせて使用してもよい。また、白
色顔料の添加量は、樹脂１００重量部に対し、０．００
１〜５．０重量部であり、好ましくは０．０１〜２．０
重量部である。Examples of white pigments to be added to the resin material to make milky white resin include inorganic oxides such as titanium oxide, barium oxide, talc, barium sulfate, aluminum hydroxide, silica, mica, calcium carbonate, calcium sulfate, clay and the like. Organic pigments such as pigments and polymer beads are included. Of these, barium sulfate, calcium carbonate, and titanium oxide are preferred. These white pigments may be used alone or in combination of two or more. The amount of the white pigment added was 0.00 parts by weight based on 100 parts by weight of the resin.
1 to 5.0 parts by weight, preferably 0.01 to 2.0 parts by weight.
Parts by weight.
【００３４】本発明において使用する樹脂材料からなる
樹脂板、たとえば、アクリル樹脂板は、ガラスキャスト
製法、連続キャスト製法、押出し製法等のシート賦形方
法により得ることができる。また、樹脂板から樹脂製照
明カバーへの成形方法は、真空成形、圧空成形、プレス
成形等が挙げられる。The resin plate made of the resin material used in the present invention, for example, an acrylic resin plate, can be obtained by a sheet forming method such as a glass casting method, a continuous casting method, and an extrusion method. In addition, as a method of forming a resin lighting cover from a resin plate, vacuum forming, pressure forming, press forming, and the like can be given.
【００３５】[0035]
【実施例】以下、実施例、参考例、比較例を掲げて本発
明をさらに具体的に説明する。 ［参考例１］および［実施例１〜８］メタクリル酸メチ
ル７５重量％とメタクリル酸メチル重合体２５重量％か
らなるモノマー混合物（アクリルシラップ）１００重量
部に対し、重合開始剤として、α，α′−アゾビス−
（２，４）−ジメチルバレロニトリル０．０４重量部、
紫外線吸収剤としてチヌビン３２７（チバガイギイ社
製、２−（２′−ヒドロキシ−３′，５′−ジ−ｔ−ブ
チルフェニル）−５−クロロベンゾトリアゾールの商品
名）およびユービナール３０５０（ＢＡＳＦ社製、２，
２′，４，４′−テトラヒドロキシ−ベンゾフェノンの
商品名）ならびに白色顔料として酸化チタン、硫酸バリ
ウムを表１に記した配合割合で添加混合し、撹拌溶解し
た。The present invention will now be described more specifically with reference to examples, reference examples and comparative examples. [Reference Example 1] and [Examples 1 to 8] With respect to 100 parts by weight of a monomer mixture (acrylic syrup) composed of 75% by weight of methyl methacrylate and 25% by weight of a methyl methacrylate polymer, α, α were used as polymerization initiators. '-Azobis-
(2,4) -dimethylvaleronitrile 0.04 parts by weight,
Tinuvin 327 (trade name of 2- (2'-hydroxy-3 ', 5'-di-t-butylphenyl) -5-chlorobenzotriazole) and Eubinal 3050 (trade name, manufactured by BASF, Inc.) 2,
2 ′, 4,4′-Tetrahydroxy-benzophenone (trade name) and titanium oxide and barium sulfate as white pigments were added and mixed in the mixing ratio shown in Table 1 and dissolved by stirring.
【００３６】予め厚みが２ｍｍ（実施例１〜５）または
３ｍｍ（実施例６〜８）となるよう設定された塩化ビニ
ル樹脂製ガスケットと、３００×３００ｍｍ角の強化硝
子板により構成された鋳型内に、上記アクリルシラップ
を流し込み、６５℃の温水中に１時間浸漬した。次いで
１２０℃の空気浴中に２時間置いて重合反応を完了さ
せ、鋳型から乳白色のアクリル樹脂板を取り出した。A mold made of a gasket made of vinyl chloride resin and having a thickness of 2 mm (Examples 1 to 5) or 3 mm (Examples 6 to 8) and a reinforced glass plate of 300 × 300 mm square. The above acrylic syrup was poured into the container and immersed in hot water at 65 ° C. for 1 hour. Then, the mixture was placed in an air bath at 120 ° C. for 2 hours to complete the polymerization reaction, and the milky white acrylic resin plate was removed from the mold.
【００３７】得られた板厚２ｍｍまたは３ｍｍの樹脂板
を、１６０℃の加熱炉内で１５分間加熱して、照明カバ
ー用の型を用いて真空成形にて直径９００ｍｍの樹脂製
照明カバーを得た。この照明カバーの延伸部分の板厚を
測定し、最も薄く延伸された部分の分光スペクトルを分
光光度計で測定し、透過率が１％以下である最大波長を
求めた。紫外線吸収剤を添加しない点を除いて実施例１
と同様にして成形した参考例１を基準として、各処方に
おける最も薄く延伸された部分の黄変度ΔＹＩを色差計
を用いて測定した。それらの結果を表１に組成とともに
示した。なお、実施例４および実施例８においては最も
薄く延伸された部分の厚みが１／５になる形状の型、実
施例６においては最も薄く延伸された部分の厚みが１／
３になる形状の型を用いて、樹脂製照明カバーを得た。The obtained resin plate having a thickness of 2 mm or 3 mm is heated in a heating furnace at 160 ° C. for 15 minutes, and a resin illumination cover having a diameter of 900 mm is obtained by vacuum forming using a mold for the illumination cover. Was. The plate thickness of the stretched portion of the lighting cover was measured, and the spectral spectrum of the thinnest stretched portion was measured with a spectrophotometer to determine the maximum wavelength at which the transmittance was 1% or less. Example 1 except that no UV absorber was added
Using the color difference meter, the yellowing degree ΔYI of the thinnest stretched portion in each formulation was measured with reference to Reference Example 1 molded in the same manner as described above. The results are shown in Table 1 together with the composition. In Examples 4 and 8, the thickness of the thinnest stretched portion was reduced to 1/5, and in Example 6, the thickness of the thinnest stretched portion was reduced to 1/5.
A resin lighting cover was obtained using a mold having a shape of 3.
【００３８】[0038]
【表１】 [Table 1]
【００３９】［実施例９］アクリル樹脂成形材料として
アクリペットＶＨ＃０００（三菱レイヨン（株）製、登
録商標）１００重量部に対し、白色顔料硫酸バリウム
１．０重量部および酸化チタン０．０１重量部、青色染
料ダイヤレジンブルーＧ（三菱化学（株）製）０．００
０２重量部および紫外線吸収剤「チヌビン３２７」を
１．０重量部加えて、２３０℃で混練りしてペレット化
した後、２３０℃で押出し成形して板厚２ｍｍの乳白色
アクリル樹脂板を得た。得られた樹脂板を実施例１と同
様にして直径９００ｍｍの照明カバー形状に成形して樹
脂製照明カバーを得た。成形品の板厚は最も薄い箇所が
０．５ｍｍで透過率が１％以下である最大波長は３９７
ｎｍであった。Example 9 1.0 part by weight of a white pigment barium sulfate and 0.01 part by weight of titanium oxide per 100 parts by weight of Acrypet VH # 000 (registered trademark, manufactured by Mitsubishi Rayon Co., Ltd.) as an acrylic resin molding material Parts by weight, blue dye diamond resin blue G (manufactured by Mitsubishi Chemical Corporation) 0.00
After adding 02 parts by weight and 1.0 part by weight of an ultraviolet absorber “Tinuvin 327”, kneading at 230 ° C., pelletizing, and extruding at 230 ° C., a milky white acrylic resin plate having a thickness of 2 mm was obtained. . The obtained resin plate was formed into a lighting cover shape having a diameter of 900 mm in the same manner as in Example 1 to obtain a resin lighting cover. The thickness of the molded product is 0.5 mm at the thinnest point and the maximum wavelength at which the transmittance is 1% or less is 397.
nm.
【００４０】［比較例１］実施例９において紫外線吸収
剤「チヌビン３２７」を用いないほかは実施例９と同様
にして乳白色アクリル樹脂板を得、同様に成形して一般
用照明カバーを得た。成形品の板厚は最も薄い箇所が
０．５ｍｍで、透過率が１％以下である最大波長は２７
４ｎｍであった。Comparative Example 1 A milky white acrylic resin plate was obtained in the same manner as in Example 9 except that the ultraviolet absorber "Tinuvin 327" was not used. . The thickness of the molded product is 0.5 mm at the thinnest point, and the maximum wavelength at which the transmittance is 1% or less is 27 mm.
4 nm.
【００４１】［使用例］実施例１〜９で得た照明カバー
と比較例１で得た一般用照明カバーの内部にそれぞれ蛍
光灯（２０Ｗ×２本）をセットし夜間（夏季午後７時）
の屋外（気温２７℃、天候晴）にて点灯し１時間放置し
て昆虫類の誘引効果を調査したところ、実施例１〜９で
得た照明カバー側には昆虫類の飛来が少なく、防虫効果
が認められた。[Usage Example] Fluorescent lamps (20 W × 2) were set inside the lighting covers obtained in Examples 1 to 9 and the general lighting cover obtained in Comparative Example 1 at night (at 7:00 pm in summer).
When the light was turned on outdoors (at a temperature of 27 ° C. and the weather was fine) and left for 1 hour to investigate the attracting effect of insects, the lighting cover side obtained in Examples 1 to 9 showed few insects flying, The effect was recognized.
【００４２】[0042]
【発明の効果】本発明の照明カバーは、黄帯色が少な
く、また、成形延伸によって板厚が薄肉化しても防虫効
果が低減しないという優れた効果を奏する。また、この
照明カバーは低価格で製造可能である。The lighting cover of the present invention has an excellent effect that the yellowish color is small and the insect repellent effect is not reduced even if the thickness of the sheet is reduced by forming and stretching. Also, this lighting cover can be manufactured at a low price.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 北 耕太郎 東京都港区港南一丁目６番41号 三菱レイ ヨン株式会社内 Ｆターム(参考） 4J002 BC041 BD051 BG061 CF001 CG011 DE137 DE147 DE237 DG047 DG057 DJ017 DJ037 DJ057 EE036 EU176 FD056 FD097 GP00 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kotaro Kita 1-6-1, Konan, Minato-ku, Tokyo F-term in Mitsubishi Rayon Co., Ltd. (reference) 4J002 BC041 BD051 BG061 CF001 CG011 DE137 DE147 DE237 DG047 DG057 DJ017 DJ037 DJ057 EE036 EU176 FD056 FD097 GP00
Claims (8)
０ｎｍ以下の光の透過率が１％以下である樹脂製照明カ
バー。1. A wavelength 37 in a thickness direction of an illumination cover.
A resin illumination cover having a transmittance of light of 0 nm or less of 1% or less.
範囲にある紫外線吸収剤が含有されていることを特徴と
する請求項１に記載の樹脂製照明カバー。2. The resin illumination cover according to claim 1, further comprising an ultraviolet absorber having an absorption wavelength peak in a range of 340 to 380 nm.
されてなり、元の樹脂板厚みに対して１／３〜１／５の
厚みに成形延伸された部分を照明カバーの少なくとも一
部に有することを特徴とする請求項１または請求項２に
記載の樹脂製照明カバー。3. A lighting cover made of resin is formed and stretched from a resin plate, and a portion formed and stretched to a thickness of 1/3 to 1/5 of an original thickness of the resin plate is formed on at least a part of the lighting cover. The resin lighting cover according to claim 1, wherein the resin lighting cover has the resin lighting cover.
ら成形延伸されてなり、樹脂板を構成する樹脂に対する
紫外線吸収剤の含有量Ａ（重量％）が式（１）および式
（２）を満たすことを特徴とする請求項３に記載の樹脂
製照明カバー。 【数１】 【数２】 4. A resin sheet containing an ultraviolet absorber is molded and stretched, and the content A (% by weight) of the ultraviolet absorber with respect to the resin constituting the resin plate is determined by the formulas (1) and (2). The resin lighting cover according to claim 3, wherein the following conditions are satisfied. (Equation 1) (Equation 2)
シ−４−メトキシベンゾフェノン、２，２′−ジヒドロ
キシ−４，４′−ジメトキシベンゾフェノン、２，
２′，４，４′−テトラヒドロキシ−ベンゾフェノン、
２−（２′−ヒドロキシ−３′−ｔｅｒｔ−ブチル−
５′−メチルフェニル）−５−クロロベンゾトリアゾー
ル、２−（２′−ヒドロキシ−３′，５′−ジ−ｔｅｒ
ｔ−ブチルフェニル）−５−クロロベンゾトリアゾー
ル、２−（２′−ヒドロキシ−４′−オクトキシフェニ
ル）ベンゾトリアゾールからなる群より選ばれる少くと
も１種を用いることを特徴とする請求項２または請求項
４に記載の樹脂製照明カバー。5. An ultraviolet absorbent comprising 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone,
2 ', 4,4'-tetrahydroxy-benzophenone,
2- (2'-hydroxy-3'-tert-butyl-
5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-ter
3. The method according to claim 2, wherein at least one selected from the group consisting of t-butylphenyl) -5-chlorobenzotriazole and 2- (2'-hydroxy-4'-octoxyphenyl) benzotriazole is used. The resin lighting cover according to claim 4.
を特徴とする請求項１〜５の何れかに記載の樹脂製照明
カバー。6. The resin lighting cover according to claim 1, wherein the resin is a milky white acrylic resin.
透過率が３０〜６０％の範囲である請求項６に記載の樹
脂製照明カバー。7. The resin lighting cover according to claim 6, wherein the visible light transmittance in the thickness direction of the lighting cover is in a range of 30 to 60%.
硫酸バリウム、炭酸カルシウム、酸化チタンを単独また
は２種以上の混合物として樹脂に対して０．００１〜
５．０重量％の範囲で含有してなる請求項６または請求
項７に記載の樹脂製照明カバー。8. A milky white acrylic resin containing barium sulfate, calcium carbonate, and titanium oxide as milky white pigments alone or as a mixture of two or more thereof in an amount of 0.001 to 0.001.
The resin lighting cover according to claim 6 or 7, wherein the resin lighting cover is contained in a range of 5.0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10253316A JP2000067629A (en) | 1998-08-25 | 1998-08-25 | Lighting cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10253316A JP2000067629A (en) | 1998-08-25 | 1998-08-25 | Lighting cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000067629A true JP2000067629A (en) | 2000-03-03 |
Family
ID=17249615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10253316A Pending JP2000067629A (en) | 1998-08-25 | 1998-08-25 | Lighting cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000067629A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082116A (en) * | 2001-09-14 | 2003-03-19 | Mitsubishi Kagaku Sanshi Corp | Crosslinked olefin resin pipe and its production method |
| JP2005146278A (en) * | 2003-11-13 | 2005-06-09 | Eastman Chem Co | Ultraviolet-blocking composition for protection of package or container content |
| JP2007109436A (en) * | 2005-10-11 | 2007-04-26 | Maruzen Electric Co Ltd | Luminaire |
| JP2007294204A (en) * | 2006-04-24 | 2007-11-08 | Matsushita Electric Works Ltd | Light filter for lighting fixture and lighting fixture using it |
| WO2008102822A1 (en) | 2007-02-20 | 2008-08-28 | Fujifilm Corporation | Polymer material containing ultraviolet absorbent |
| WO2008123504A1 (en) | 2007-03-30 | 2008-10-16 | Fujifilm Corporation | Ultraviolet ray absorber composition |
| JP2008311235A (en) * | 2008-07-24 | 2008-12-25 | Sharp Corp | Illuminating device and display device equipped with above, as well as manufacturing method of illuminating device |
| WO2009022736A1 (en) | 2007-08-16 | 2009-02-19 | Fujifilm Corporation | Heterocyclic compound, ultraviolet ray absorbent, and composition comprising the ultraviolet ray absorbent |
| JP2009118860A (en) * | 2003-02-13 | 2009-06-04 | Panasonic Electric Works Co Ltd | Insect preventing system |
| WO2009123142A1 (en) | 2008-03-31 | 2009-10-08 | 富士フイルム株式会社 | Ultraviolet absorbent compositions |
| WO2009123141A1 (en) | 2008-03-31 | 2009-10-08 | 富士フイルム株式会社 | Ultraviolet absorbent compositions |
| WO2009136624A1 (en) | 2008-05-09 | 2009-11-12 | 富士フイルム株式会社 | Ultraviolet absorbent composition |
-
1998
- 1998-08-25 JP JP10253316A patent/JP2000067629A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082116A (en) * | 2001-09-14 | 2003-03-19 | Mitsubishi Kagaku Sanshi Corp | Crosslinked olefin resin pipe and its production method |
| JP2009118860A (en) * | 2003-02-13 | 2009-06-04 | Panasonic Electric Works Co Ltd | Insect preventing system |
| JP2005146278A (en) * | 2003-11-13 | 2005-06-09 | Eastman Chem Co | Ultraviolet-blocking composition for protection of package or container content |
| JP2007109436A (en) * | 2005-10-11 | 2007-04-26 | Maruzen Electric Co Ltd | Luminaire |
| JP2007294204A (en) * | 2006-04-24 | 2007-11-08 | Matsushita Electric Works Ltd | Light filter for lighting fixture and lighting fixture using it |
| WO2008102822A1 (en) | 2007-02-20 | 2008-08-28 | Fujifilm Corporation | Polymer material containing ultraviolet absorbent |
| WO2008123504A1 (en) | 2007-03-30 | 2008-10-16 | Fujifilm Corporation | Ultraviolet ray absorber composition |
| WO2009022736A1 (en) | 2007-08-16 | 2009-02-19 | Fujifilm Corporation | Heterocyclic compound, ultraviolet ray absorbent, and composition comprising the ultraviolet ray absorbent |
| WO2009123142A1 (en) | 2008-03-31 | 2009-10-08 | 富士フイルム株式会社 | Ultraviolet absorbent compositions |
| WO2009123141A1 (en) | 2008-03-31 | 2009-10-08 | 富士フイルム株式会社 | Ultraviolet absorbent compositions |
| WO2009136624A1 (en) | 2008-05-09 | 2009-11-12 | 富士フイルム株式会社 | Ultraviolet absorbent composition |
| JP2008311235A (en) * | 2008-07-24 | 2008-12-25 | Sharp Corp | Illuminating device and display device equipped with above, as well as manufacturing method of illuminating device |
| JP4604115B2 (en) * | 2008-07-24 | 2010-12-22 | シャープ株式会社 | LIGHTING DEVICE, DISPLAY DEVICE HAVING THE SAME, AND LIGHTING DEVICE MANUFACTURING METHOD |
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