JP6512572B2 - Blue light cutting method of light transmitting plastic member - Google Patents
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- JP6512572B2 JP6512572B2 JP2014069307A JP2014069307A JP6512572B2 JP 6512572 B2 JP6512572 B2 JP 6512572B2 JP 2014069307 A JP2014069307 A JP 2014069307A JP 2014069307 A JP2014069307 A JP 2014069307A JP 6512572 B2 JP6512572 B2 JP 6512572B2
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- 239000004033 plastic Substances 0.000 title claims description 96
- 238000000034 method Methods 0.000 title claims description 36
- 238000005520 cutting process Methods 0.000 title claims description 31
- 231100000987 absorbed dose Toxicity 0.000 claims description 85
- 230000005865 ionizing radiation Effects 0.000 claims description 42
- 230000005855 radiation Effects 0.000 claims description 18
- 230000001678 irradiating effect Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 9
- 229920005668 polycarbonate resin Polymers 0.000 claims description 9
- 239000004431 polycarbonate resin Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 8
- 229920006122 polyamide resin Polymers 0.000 claims description 8
- 238000002834 transmittance Methods 0.000 description 28
- 238000004040 coloring Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 8
- 230000003595 spectral effect Effects 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000004043 dyeing Methods 0.000 description 6
- 229920001778 nylon Polymers 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000011342 resin composition Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- -1 polyhexamethylene sebacamide Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical compound [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 125000005395 methacrylic acid group Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Eyeglasses (AREA)
- Optical Filters (AREA)
Description
本発明は、例えばメガネ用のカラーレンズあるいは表示装置用の光透過性表示板などの光透過性プラスチック部材に係り、特に波長が４００ｎｍ〜５００ｎｍの青色光を所望のカット率でカットする光透過性プラスチック部材の青色光カット方法に関するものである。 The present invention relates to a light-transmissive plastic member such as a color lens for glasses or a light-transmissive display plate for a display device, and in particular, a light-transmissive member for cutting blue light having a wavelength of 400 nm to 500 nm at a desired cut rate. The present invention relates to a method of cutting blue light of a plastic member.
プラスチック光学製品の一つである視力補正メガネ用レンズおよびサングラス用レンズを例に説明する。 A lens for vision correction glasses, which is one of plastic optical products, and a lens for sunglasses will be described as an example.
チラツキの原因となる青色光を効果的にカットして、眩しさを軽減し、それによりコントラストが強調されて、物が明るく見え、また目の保護ができること、さらにはファッション性を高めるために、従来よりカラーレンズが使用されている。 In order to effectively cut off the blue light that causes flicker, to reduce glare, thereby enhancing the contrast, to make things look bright, to be able to protect the eyes, and to enhance the fashion, Color lenses are conventionally used.
レンズに着色する方法としては、染料を含有した染色浴液中にレンズを所定時間浸漬することにより、レンズに染料を浸透させて着色する方法がある（特表２００５−５０８４５９号公報：特許文献１参照）。 As a method of coloring a lens, there is a method of permeating a dye into a lens and coloring it by immersing the lens in a dyeing bath solution containing a dye for a predetermined time (Japanese Patent Application Publication No. 2005-508459: Patent Document 1) reference).
しかし、この方法では、レンズ内に染料が分散された状態で存在するために、レンズへ入ってきた光がこの染料によって拡散して光の透過率を低下させ、レンズを通して物を見たときに、全体として肉眼で見たときよりも暗く感じる現象が発生していた。
また、この着色方法は、染色浴液を利用していることから、染色浴液中への染料の分散ムラ、レンズを染色浴液に浸漬したときの染料の浸透ムラが発生する等の品質上の問題が発生することがあった。そのため、左眼用と右眼用のレンズを対にしての同時着色する方法をとらざるを得なかった（着色ムラの防止）。
さらに、染色浴液に使用する染料が混在した液の排水処理、また染色工程中の温度制御等に利用するエネルギーのロス等の問題があった。
However, in this method, since the dye is present in the lens in a dispersed state, the light entering the lens is diffused by the dye to lower the light transmittance, and when looking through the lens As a whole, there was a phenomenon that felt darker than when viewed with the naked eye.
In addition, since this coloring method utilizes the dyeing bath solution, the dispersion of the dye in the dyeing bath solution, the penetration unevenness of the dye when the lens is immersed in the dyeing bath solution, and so on Problems could occur. Therefore, a method of simultaneously coloring lenses for the left eye and for the right eye in pairs had to be adopted (prevention of uneven coloring).
Furthermore, there are problems such as waste water treatment of the solution in which the dye used in the dyeing bath is mixed, and loss of energy used for temperature control in the dyeing process.
さらにまた、別の方法として、太陽光のような紫外線を含む光が照射される屋外ではレンズが速やかに着色してサングラスとして機能し、そのような光の照射がない屋内においては退色して透明な通常のメガネとして機能するメガネ、いわゆるフォトクロミック性を持ったプラスチックレンズの製造に関し、光重合開始剤を使用する方法がある（特表２００５−５０８４５９号公報：特許文献２参照）。 Furthermore, as another method, the lens is rapidly colored to function as sunglasses when exposed to light containing ultraviolet light such as sunlight, and it is discolored and transparent indoors when there is no such light irradiation. There is a method of using a photopolymerization initiator with respect to the manufacture of a so-called photochromic plastic lens having so-called photo glasses, which functions as ordinary glasses (see Japanese Patent Application Publication No. 2005-508459: Patent Document 2).
しかし、この方法は、フォトクロミックス性を持ったレンズであることから、常時、一定に着色したレンズが得られない、かつ、所定の着色を施すことが困難であった。また、フォトクロミックス性を重視するために、レンズを透過する光の透過率についての考慮がなされていない。 However, since this method is a photochromic lens, it is not always possible to obtain a regularly colored lens and it is difficult to apply a predetermined color. Also, in order to emphasize photochromism, no consideration is given to the transmittance of light transmitted through the lens.
一方、レンズの材料となる熱硬化性樹脂、熱可塑性樹脂等の合成樹脂は、製造過程あるいはその利用する過程で、電離性放射線を照射されると色付くことが知られている（特開２０１０−０５９２９５号公報：特許文献３参照）。しかし、この放射線照射は、樹脂に積極的に着色を施して利用するためのものではなく、発色することを邪魔な存在として取扱い、着色を防止する工夫がなされている。 On the other hand, it is known that synthetic resins such as thermosetting resins and thermoplastic resins, which are materials of lenses, become colored when they are irradiated with ionizing radiation in the manufacturing process or the process of using them (Japanese Patent Laid-Open No. 2010- No. 059295: See Patent Document 3). However, this radiation irradiation is not intended for positively coloring and utilizing the resin, and the device is designed to handle the color development as an obstacle to prevent coloring.
また、基材の表面に形成したコーティング（発色剤を含む樹脂組成物）を放射線に曝露することにより発色させる着色方法が知られている（特表２００７−５３２７０７号公報：特許文献４参照）。 Moreover, the coloring method which makes it color by exposing the coating (resin composition containing a color-developing agent) formed on the surface of a base material to radiation is known (refer to patent documents 2007-532707 gazette: patent document 4).
しかし、この着色方法は、発色させる樹脂組成物を基材の表面にコーティングすることが必要であり、基材そのものを着色することができない。 However, in this coloring method, it is necessary to coat the surface of the substrate with the resin composition to be colored, and the substrate itself can not be colored.
本出願人は先に、簡単な処理工程管理で所定の色に斑なく均一に着色し、かつ、光透過率の高いプラスチック光学部材を実現し、更には、着色処理にまつわる廃水処理、エネルギー消費等の問題点を無くすことを目的として、プラスチック光学部材に電離性放射線を照射することにより、その光学部材の着色を行う方法において、前記プラスチック光学部材に照射する電離性放射線の吸収線量は、その光学部材に着色する色によって予め定められた吸収線量を選択して照射するプラスチック光学部材の着色方法を提案した（特開２０１２−１２３２３６号公報：特許文献５参照）。 The present applicant has previously realized a plastic optical member having a uniform color without spotting in a predetermined color by simple process control and high light transmittance, and further, waste water treatment related to coloring treatment, energy consumption, etc. In the method for coloring an optical member by irradiating the plastic optical member with ionizing radiation for the purpose of eliminating the problems of the present invention, the absorbed dose of the ionizing radiation to be irradiated to the plastic optical member is the optical The coloring method of the plastic optical member which selects and irradiates the absorption dose predetermined according to the color colored to a member and was irradiated was proposed (refer Unexamined-Japanese-Patent No. 2012-123236: patent document 5).
前記特許文献５には、下記のような主旨が記載されている。 Patent Document 5 describes the following main points.
すなわち、レンズへの着色は、特にファッション性を帯びたものが多くなることから、レンズの色に対する顧客の要望も千差万別である。この顧客の要望に応えるため、まず、レンズの色見本を作成する。この最終製品としての色見本には、その色をレンズに着色するための電離性放射線の照射条件を対応させてデータベース化している。 That is, since coloring of lenses is particularly fashionable, many customers have different requests for lens colors. In order to meet the needs of this customer, first create a color sample of the lens. In this color sample as the final product, a database of ionizing radiation irradiation conditions for coloring the color to the lens is made corresponding.
このレンズの色見本に沿って、顧客の要望によって着色するレンズの色を選択してもらう。 Along with the lens color book, have the lens color selected according to the customer's request.
そして、顧客が選択した色から、前記データベースに基づき、照射に必要な吸収線量を特定する。この吸収線量に従ってレンズへの電離性放射線照射を行い、所定の色安定化期間（例えば１００日程度）放置後に所望の色に着色した完成品のレンズとなる。 And the absorbed dose required for irradiation is specified from the color selected by the customer based on the above-mentioned database. According to the absorbed dose, the lens is irradiated with ionizing radiation, and after leaving for a predetermined color stabilization period (for example, about 100 days), it becomes a finished lens colored in a desired color.
この特許文献５には、レンズに電離性放射線を照射することにより、４８０ｎｍ以下の光を吸収する例が示されているが、これは電離性放射線の照射条件と青色光のカット率（波長４００ｎｍ〜５００ｎｍ）との関係を体系的にまとめたものではない。
すなわち、光透過性プラスチック部材の用途（例えば、光透過性プラスチック部材をメガネ用のカラーレンズ、パソコンやスマートフォンやタブレット端末などの表示装置用の光透過性表示板、あるいは光源としてＬＥＤを使用した機器の光透過板など）によって、青色光のカット率幅が異なる場合の電離性放射線の照射条件については、開示されているものではない。
本発明の目的は、光透過性プラスチック部材の材質別に、青色光のカット率幅と、電離性放射線の照射条件との関係を体系的にまとめて、所望する青色光カット率が確実に得られる光透過性プラスチック部材の青色光カット方法およびそれによって得られた光透過性プラスチック部材を提供することにある。
Although this patent document 5 shows an example of absorbing light of 480 nm or less by irradiating the lens with ionizing radiation, the irradiation condition of the ionizing radiation and the cut rate of blue light (wavelength 400 nm) are shown. ) And the relationship with ~ 500 nm) are not systematically summarized.
That is, applications of the light-transmitting plastic member (for example, a light-transmitting plastic member used as a color lens for glasses, a light-transmitting display board for display devices such as personal computers, smartphones and tablet terminals, or devices using LEDs as light sources The irradiation conditions of the ionizing radiation in the case where the cut ratio width of the blue light is different depending on the light transmission plate and the like are not disclosed.
It is an object of the present invention to systematically obtain the desired blue light cut rate by systematically putting together the relationship between the cut rate width of blue light and the irradiation condition of ionizing radiation according to the material of the light transmitting plastic member A blue light cutting method of a light transmitting plastic member and a light transmitting plastic member obtained thereby.
前記目的を達成するため本発明の第１の手段は、
光透過性プラスチック部材に対して電離性放射線を照射することにより、当該光透過性プラスチック部材を通過する光のうち、波長が４００ｎｍ〜５００ｎｍの青色光を所望のカット率でカットする光透過性プラスチック部材の青色光カット方法において、
前記光透過性プラスチック部材がポリアミド系樹脂の場合は、前記電離性放射線の照射線量（Ｘ）と前記青色光のカット率（Ｙ）の関係から求めた、下記の式（I−１）で示されるＸ−Ｙ関係曲線と、下記の式（II−１）で示されるＸ−Ｙ関係曲線で囲まれた領域の中から、前記所望のカット率（Ｙ）に適合する前記電離性放射線の照射線量（Ｘ）を選択して、その電離性放射線の照射線量（Ｘ）を前記光透過性プラスチック部材に照射し、
Ｙ＝２９．９８４Ｘ０．２５１１・・・・（I−１）
Ｙ＝１９．３５２Ｘ０．２５８３・・・・（II−１）
前記光透過性プラスチック部材がポリカーボネート系樹脂の場合は、前記電離性放射線の照射線量（Ｘ）と前記青色光のカット率（Ｙ）の関係から求めた、下記の式（I−２）で示されるＸ−Ｙ関係曲線と、下記の式（II−２）で示されるＸ−Ｙ関係曲線で囲まれた領域の中から、前記所望のカット率（Ｙ）に適合する前記電離性放射線の照射線量（Ｘ）を選択して、その電離性放射線の照射線量（Ｘ）を前記光透過性プラスチック部材に照射し、
Ｙ＝３０．４８４Ｘ０．１１３７・・・・（I−２）
Ｙ＝１９．１６９Ｘ０．１２７８・・・・（II−２）
前記光透過性プラスチック部材がポリアクリル系樹脂の場合は、前記電離性放射線の照射線量（Ｘ）と前記青色光のカット率（Ｙ）の関係から求めた、下記の式（I−３）で示されるＸ−Ｙ関係曲線と、下記の式（II−３）で示されるＸ−Ｙ関係曲線で囲まれた領域の中から、前記所望のカット率（Ｙ）に適合する前記電離性放射線の照射線量（Ｘ）を選択して、その電離性放射線の照射線量（Ｘ）を前記光透過性プラスチック部材に照射することを特徴とするものである。
Ｙ＝８．０７９４Ｘ０．３６１９・・・・（I−３）
Ｙ＝５．８２５９Ｘ０．３３・・・・・（II−３）
本発明の第２の手段は前記第１の手段において、
前記光透過性プラスチック部材がポリアミド系樹脂からなり、
(１)．前記青色光の所望のカット率の範囲が２０％〜３５％の場合は、前記光透過性プラスチック部材に対して吸収線量を１ｋＧｙ、
(２)．前記青色光の所望のカット率の範囲が２５％〜４２％の場合は、前記光透過性プラスチック部材に対して吸収線量を５ｋＧｙ〜１０ｋＧｙ、
(３)．前記青色光の所望のカット率の範囲が３５％〜６０％の場合は、前記光透過性プラスチック部材に対して吸収線量を１５ｋＧｙ、
(４)．前記青色光の所望のカット率の範囲が４８％〜７５％の場合は、前記光透過性プラスチック部材に対して吸収線量を２０ｋＧｙ〜２５ｋＧｙ、
とし、
前記光透過性プラスチック部材がポリカーボネート系樹脂からなり、
(１)．前記青色光の所望のカット率の範囲が２０％〜３２％の場合は、前記光透過性プラスチック部材に対して吸収線量を１ｋＧｙ、
(２)．前記青色光の所望のカット率の範囲が２３％〜３６％の場合は、前記光透過性プラスチック部材に対して吸収線量を５ｋＧｙ、
(３)．前記青色光の所望のカット率の範囲が２５％〜４０％の場合は、前記光透過性プラスチック部材に対して吸収線量を１０ｋＧｙ〜２０ｋＧｙ、
(４)．前記青色光の所望のカット率の範囲が３２％〜５０％の場合は、前記光透過性プラスチック部材に対して吸収線量を２５ｋＧｙ、
とし、
前記光透過性プラスチック部材がポリアクリル系樹脂からなり、
(１)．前記青色光の所望のカット率の範囲が５％〜１３％の場合は、前記光透過性プラスチック部材に対して吸収線量を１ｋＧｙ〜５ｋＧｙ、
(２)．前記青色光の所望のカット率の範囲が１０％〜２３％の場合は、前記光透過性プラスチック部材に対して吸収線量を１０ｋＧｙ〜１５ｋＧｙ、
(３)．前記青色光の所望のカット率の範囲が１５％〜３０％の場合は、前記光透過性プラスチック部材に対して吸収線量を２０ｋＧｙ〜２５ｋＧｙ、
とすることを特徴とするものである。
本発明の第３の手段は前記第１または第２の手段において、
前記光透過性プラスチック部材の表面に機能性膜を形成した後、その機能性膜の上から光透過性プラスチック部材に対して電離性放射線を照射することを特徴とするものである。
本発明の第４の手段は前記第１または第２の手段において、
前記光透過性プラスチック部材が他の部材と一体になっている状態で、前記光透過性プラスチック部材に対して電離性放射線を照射することを特徴とするものである。
本発明の第５の手段は光透過性プラスチック部材であって、前記第１ないし第４のいずれかの青色光カット方法で処理されたことを特徴とするものである。
本発明の第６の手段は前記第５の手段において、光透過性プラスチック部材が、メガネ用レンズ、表示装置用の光透過性表示板、光源としてＬＥＤを使用した機器の光透過性部材、カメラ用レンズ、光学系フィルターであることを特徴とするものである。
In order to achieve the above object, the first means of the present invention is
A light transmitting plastic which cuts blue light having a wavelength of 400 nm to 500 nm at a desired cutting rate among light passing through the light transmitting plastic member by irradiating the light transmitting plastic member with ionizing radiation In the blue light cutting method of the member,
When the light transmitting plastic member is a polyamide-based resin, it is represented by the following formula (I-1) obtained from the relationship between the irradiation dose (X) of the ionizing radiation and the cut rate (Y) of the blue light Radiation of the ionizing radiation that conforms to the desired cut rate (Y) from the region surrounded by the X-Y relationship curve and the X-Y relationship curve represented by the following equation (II-1) The dose (X) is selected, and the radiation dose (X) of the ionizing radiation is applied to the light transmitting plastic member,
Y = 29.984X 0.2511 ... (I-1)
Y = 19.352 × 0.2583・ ・ ・ (II-1)
When the light transmitting plastic member is a polycarbonate resin, it is represented by the following formula (I-2) obtained from the relationship between the irradiation dose (X) of the ionizing radiation and the cut rate (Y) of the blue light Radiation of the ionizing radiation that conforms to the desired cut rate (Y) from the region surrounded by the X-Y relationship curve and the X-Y relationship curve represented by the following formula (II-2) The dose (X) is selected, and the radiation dose (X) of the ionizing radiation is applied to the light transmitting plastic member,
Y = 30.484 X 0.1137 ... (I-2)
Y = 19.169 X 0.1278 .. (II-2)
When the light transmitting plastic member is a polyacrylic resin, the following formula (I-3) is obtained from the relationship between the irradiation dose (X) of the ionizing radiation and the cut rate (Y) of the blue light. Among the region surrounded by the XY relationship curve shown and the X-Y relationship curve shown by the following equation (II-3), the ionizing radiation of the ionizing radiation that meets the desired cut rate (Y) The radiation dose (X) is selected, and the radiation dose (X) of the ionizing radiation is applied to the light transmitting plastic member.
Y = 8.0794 X 0.3619 · · · (I-3)
Y = 5.8259 X 0.33 .... (II-3)
According to a second means of the present invention, in the first means,
The light transmitting plastic member is made of polyamide resin,
(1). When the range of the desired cut rate of the blue light is 20% to 35%, the absorbed dose to the light transmitting plastic member is 1 kGy,
(2). When the desired cut rate range of the blue light is 25% to 42%, the absorbed dose to the light transmitting plastic member is 5 kGy to 10 kGy,
(3). When the range of the desired cut rate of the blue light is 35% to 60%, the absorbed dose to the light transmitting plastic member is 15 kGy,
(4). When the range of the desired cut rate of the blue light is 48% to 75%, the absorbed dose to the light transmitting plastic member is 20 kGy to 25 kGy,
age,
The light transmitting plastic member is made of polycarbonate resin,
(1). When the range of the desired cut rate of the blue light is 20% to 32%, the absorbed dose is 1 kGy to the light transmitting plastic member,
(2). When the desired cut rate range of the blue light is 23% to 36%, the absorbed dose to the light transmitting plastic member is 5 kGy,
(3). When the range of the desired cutting rate of the blue light is 25% to 40%, the absorbed dose to the light transmitting plastic member is 10 kGy to 20 kGy,
(4). When the range of the desired cut rate of the blue light is 32% to 50%, the absorbed dose to the light transmitting plastic member is 25 kGy,
age,
The light transmitting plastic member is made of polyacrylic resin,
(1). When the range of the desired cutting rate of the blue light is 5% to 13%, the absorbed dose to the light transmitting plastic member is 1 kGy to 5 kGy,
(2). When the range of the desired cut rate of the blue light is 10% to 23%, the absorbed dose to the light transmitting plastic member is 10 kGy to 15 kGy,
(3). When the range of the desired cut rate of the blue light is 15% to 30%, the absorbed dose to the light transmitting plastic member is 20 kGy to 25 kGy,
It is characterized by being.
According to a third means of the present invention, in the first or second means,
After forming a functional film on the surface of the light transmitting plastic member, ionizing radiation is irradiated onto the light transmitting plastic member from above the functional film.
A fourth means of the present invention is the above first or second means,
The light transmitting plastic member is irradiated with ionizing radiation in a state where the light transmitting plastic member is integrated with the other members.
A fifth means of the present invention is a light transmitting plastic member, characterized in that it is treated by any one of the first to fourth blue light cutting methods.
According to a sixth means of the present invention, in the fifth means, the light-transmitting plastic member is a lens for glasses, a light-transmitting display plate for a display device, a light-transmitting member of an apparatus using an LED as a light source, a camera And an optical system filter.
本発明は前述のような構成になっており、光透過性プラスチック部材の材質別に、青色光のカット率幅と、電離性放射線の照射条件との関係を体系的にまとめて、所望する青色光カット率が確実に得られる光透過性プラスチック部材の青色光カット方法を提供することができる。 The present invention is configured as described above, and the relationship between the cut ratio width of blue light and the irradiation condition of ionizing radiation is systematically summarized according to the material of the light transmitting plastic member, and the desired blue light is obtained. It is possible to provide a blue light cutting method of a light transmitting plastic member in which the cutting rate can be reliably obtained.
本発明では光透過性プラスチック部材の材質として、ポリアミド系樹脂、ポリカーボネート系樹脂、ポリアクリル系樹脂の３種類に特定して、その材質に合った青色光のカット率幅と電離性放射線の照射条件との関係を求めた。 In the present invention, the material of the light transmitting plastic member is specified as three types of polyamide resin, polycarbonate resin, and polyacrylic resin, and the cut rate width of blue light and the irradiation condition of the ionizing radiation suitable for the material Asked for a relationship with
ポリアミド系樹脂としては、例えばポリカプラミド(６−ナイロン：商標登録)、ポリヘキサメチレンアジポアミド(６，６−ナイロン：商標登録)、ポリヘキサメチレンセバカミド(６，１０−ナイロン：商標登録)、ポリ−ω−アミノペブタン酸(７−ナイロン：商標登録)、ポリ−ω−アミノノナン酸(９−ナイロン：商標登録)、ポリウンデカンアミド(１１−ナイロン：商標登録)などがある。ポリアミド系樹脂は、耐衝撃性に優れている。 Polyamide-based resins include, for example, polycoupler (6-nylon: trademark registered), polyhexamethylene adipamide (6,6-nylon: trademark registered), polyhexamethylene sebacamide (6, 10-nylon: trademark registered) And poly-ω-aminopebutanoic acid (7-nylon: trademark), poly-ω-aminononanoic acid (9-nylon: trademark), and polyundecaneamide (11-nylon: trademark). The polyamide resin is excellent in impact resistance.
ポリカーボネート系樹脂は、主鎖中に炭酸エステル結合（−Ｏ−ＣＯ−Ｏ−）を有する熱可塑性ポリマーであり、耐衝撃性に優れ、吸湿性が小さい。
ポリアクリル系樹脂としては、アクリル酸およびそのエステル、アクリルアミド、アクロニトリル、メタクリル酸およびそのエステルなどの重合体および共重合体などがあり、光透過率が大きく透明性が優れている。
本発明の光透過性プラスチック部材は、紫外線吸収剤、赤外線吸収剤、光安定化剤、内部離型剤、酸化防止剤、染料、顔料、耐電防止剤、偏光剤（偏光膜）等の公知の各種添加剤を加えて、混合または重合させることにより特定の効果を付与しても良い。
A polycarbonate-based resin is a thermoplastic polymer having a carbonate bond (-O-CO-O-) in its main chain, is excellent in impact resistance, and has low hygroscopicity.
Examples of polyacrylic resins include polymers and copolymers of acrylic acid and esters thereof, acrylamides, acronitriles, methacrylic acids and esters thereof, and the like, and have high light transmittance and excellent transparency.
The light transmitting plastic member of the present invention is a known ultraviolet absorber, infrared absorber, light stabilizer, internal release agent, antioxidant, dye, pigment, antistatic agent, polarizer (polarizing film), etc. Various additives may be added to impart a specific effect by mixing or polymerization.
照射する放射線は、ガンマ線、電子線のいずれでも良く、本実施例ではコバルト６０によるガンマ線を使用し、光透過性プラスチック部材への放射線の照射は大気中でかつ室温において行った。照射した吸収線量は、１，５，１０，１５，２０，２５ｋＧｙの６段階で行った。 The radiation to be applied may be either gamma rays or electron beams. In this example, gamma rays of cobalt 60 were used, and the radiation of the light transmitting plastic member was conducted in the air at room temperature. The absorbed dose irradiated was performed in six steps of 1, 5, 10, 15, 20, 25 kGy.
図１は、ポリアミド樹脂を使用して成型したレンズへの吸収線量と光透過率との関係を示す分光透過率特性図である。なお、分光スペクトル測定のための光源はタングステンランプ／Ｄ２ランプ、分光スペクトル測定器はＵ３５００（株式会社 日立製作所製）を使用した。後述する他の分光スペクトル測定でも同じものを使用した。
図１中の曲線Ａは吸収線量が１ｋＧｙ、曲線Ｂは吸収線量が５ｋＧｙ、曲線Ｃは吸収線量が１０ｋＧｙ、曲線Ｄは吸収線量が１５ｋＧｙ、曲線Ｅは吸収線量が２０ｋＧｙ、曲線Ｆは吸収線量が２５ｋＧｙの場合の特性曲線である。
吸収線量１ｋＧｙの場合の照射時間は１時間、線量率は１ｋＧｙ／ｈ、
吸収線量５ｋＧｙの場合の照射時間は０．５時間、線量率は１０ｋＧｙ／ｈ、
吸収線量１０ｋＧｙの場合の照射時間は１時間、線量率は１０ｋＧｙ／ｈ、
吸収線量１５ｋＧｙの場合の照射時間は１．５時間、線量率は１０ｋＧｙ／ｈ、
吸収線量２０ｋＧｙの場合の照射時間は２時間、線量率は１０ｋＧｙ／ｈ、
吸収線量２５ｋＧｙの場合の照射時間は２．５時間、線量率は１０ｋＧｙ／ｈ、
である。線量と照射時間と線量率の条件は、図３ならびに図５に示す他の合成樹脂からなるレンズにおいても同様である。
FIG. 1 is a spectral transmittance characteristic diagram showing the relationship between the absorbed dose to a lens molded using a polyamide resin and the light transmittance. A tungsten lamp / D2 lamp was used as a light source for measuring the spectral spectrum, and a U3500 (manufactured by Hitachi, Ltd.) was used as a spectral measuring instrument. The same thing was used also in other spectroscopy measurement mentioned later.
The curve A in Fig. 1 has an absorbed dose of 1 kGy, the curve B has an absorbed dose of 5 kGy, the curve C has an absorbed dose of 10 kGy, the curve D has an absorbed dose of 15 kGy, the curve E has an absorbed dose of 20 kGy, and the curve F has an absorbed dose It is a characteristic curve in the case of 25 kGy.
The irradiation time for an absorbed dose of 1 kGy is 1 hour, and the dose rate is 1 kGy / h,
The irradiation time for an absorbed dose of 5 kGy is 0.5 hours, and the dose rate is 10 kGy / h,
When the absorbed dose is 10 kGy, the irradiation time is 1 hour, and the dose rate is 10 kGy / h,
The irradiation time for an absorbed dose of 15 kGy is 1.5 hours, and the dose rate is 10 kGy / h,
The irradiation time for an absorbed dose of 20 kGy is 2 hours, and the dose rate is 10 kGy / h,
The irradiation time for an absorbed dose of 25 kGy is 2.5 hours, and the dose rate is 10 kGy / h,
It is. The conditions of the dose, the irradiation time and the dose rate are the same as in the lenses made of other synthetic resins shown in FIG. 3 and FIG.
この図から明らかなように、特に波長４００ｎｍ〜５００ｎｍの範囲（青色光）において、曲線Ａ、曲線Ｂ、曲線Ｃのように吸収線量が比較的少ない場合には、放射線照射後の光透過率の落ち込みは少ない。これに対して曲線Ｅや曲線Ｆのように吸収線量が多い場合には、放射線照射後の光透過率の落ち込みが大きい。曲線Ｄは、曲線Ｃと曲線Ｅの中間的な特性を示している。
この図１の光透過率特性値を基にして、レンズへの吸収線量と波長４００ｎｍ〜５００ｎｍの範囲のブルーカット率(青色光カット率)との関係を図２に示す。
本発明で使用しているブルーカット率は、波長４００ｎｍの光透過率を０％（基準）とし、波長４０１ｎｍの光透過率を測定しその光透過率が例えば１０％、波長４０２ｎｍの光透過率が例えば２０％、波長４０３ｎｍの光透過率が例えば３０％、波長４０４ｎｍの光透過率が例えば４０％、波長４０５ｎｍの光透過率が例えば５０％であった場合、波長４０１ｎｍから波長４０５ｎｍまでの測定光透過率の平均値（この例では、（１０＋２０＋３０＋４０＋５０）／５＝３０％）を求める。そして、１００（％）からその平均値（この例では、３０％）除した値（この例では、１００−３０＝７０％）が波長４０１ｎｍ〜４０５ｎｍの範囲のブルーカット率と定義した。
図２に示すブルーカット率は、波長４０１ｎｍから波長１ｎｍ刻みで波長５００ｎｍまでの光透過率を測定して、波長４００ｎｍ〜５００ｎｍの範囲のブルーカット率の平均値を示している。本実施例では波長１ｎｍ刻みで波長５００ｎｍまでの光透過率を測定したが、波長数ｎｍ刻みで波長５００ｎｍまでの光透過率を測定することもできる。
As is clear from this figure, especially in the wavelength range of 400 nm to 500 nm (blue light), when the absorbed dose is relatively small as in Curve A, Curve B, and Curve C, the light transmittance after radiation irradiation is There is little decline. On the other hand, when the absorbed dose is large as in the curve E and the curve F, the drop in light transmittance after irradiation is large. Curve D shows an intermediate characteristic between curves C and E.
Based on the light transmittance characteristic value of FIG. 1, the relationship between the absorbed dose to the lens and the blue cut rate (blue light cut rate) in the wavelength range of 400 nm to 500 nm is shown in FIG.
The blue cut rate used in the present invention is 0% (reference) for the light transmittance at a wavelength of 400 nm, and the light transmittance at a wavelength of 401 nm is measured, and the light transmittance is 10%, for example. For example, when the light transmittance of a wavelength of 403 nm is 30%, the light transmittance of a wavelength of 404 nm is 40%, and the light transmittance of a wavelength of 405 nm is 50%, for example, measurement from a wavelength of 401 nm to a wavelength of 405 nm The average value of light transmittance (in this example, (10 + 20 + 30 + 40 + 50) / 5 = 30%) is determined. Then, a value (100-30 = 70% in this example) obtained by dividing the average value (30% in this example) from 100 (%) was defined as the blue cut rate in the wavelength range of 401 nm to 405 nm.
The blue cut rate shown in FIG. 2 indicates the average value of the blue cut rate in the wavelength range of 400 nm to 500 nm by measuring the light transmittance from the wavelength of 401 nm to the wavelength of 500 nm in steps of 1 nm. In the present embodiment, the light transmittance up to the wavelength 500 nm is measured in 1 nm wavelength steps, but it is also possible to measure the light transmittance up to the wavelength 500 nm in a few nm wavelength steps.
この分光スペクトル測定は、同じ樹脂組成物のレンズに対して同じ放射線照射条件で多数個行い、それらのブルーカット率のバラツキの状態を示している。図中の◆点はブルーカット率の上限値を、▲点は下限値を、■点は平均値をそれぞれ示している。 In this spectrum measurement, a large number of lenses of the same resin composition are subjected to the same radiation irradiation condition, and the state of the variation of the blue cut rate is shown. In the figure, the point ◆ indicates the upper limit value of the blue cut rate, the point ▲ indicates the lower limit value, and the point ■ indicates the average value.
またこの図２は、レンズに対して吸収線量を１，５，１０，１５，２０，２５ｋＧｙ照射したときのブルーカット率の変化を示す特性図であって、同図の複数の◆点どうしを結んだ曲線（Ｉ−１）はＹ＝２９．９８４Ｘ０．２５１１で表わされ、▲点どうしを結んだ曲線（II−１）はＹ＝１９．３５２Ｘ０．２５８３で表わされ、■点どうしを結んだ曲線（III−１）はＹ＝２４．６７４Ｘ０．２５１４で表わされる。ただし、式中のＸは吸収線量（ｋＧｙ）、Ｙはブルーカット率（％）である。 Also, FIG. 2 is a characteristic diagram showing changes in blue cut rate when the absorbed dose is irradiated to the lens at 1, 5, 10, 15, 20, 25 kGy, and a plurality of ♦ points in FIG. The connected curve (I-1) is represented by Y = 29.984 X 0.2511 , the curve (II-1) connecting points ▲ is represented by Y = 19.352 × 0.2583 , and ■ point A curve (III-1) connecting the two is represented by Y = 24.674 × 0.2514 . However, X in a formula is absorbed dose (kGy), Y is a blue cut rate (%).
この図２により、レンズへの吸収線量と、その放射線照射によって得られるブルーカット率幅との関係が明確になり、前記曲線（Ｉ−１）と曲線（II−１）で囲まれる領域（斜線領域）内で、希望するブルーカット率の範囲に応じてレンズに対する吸収線量を選択、設定するようになっている。 From FIG. 2, the relationship between the absorbed dose to the lens and the blue cut width obtained by the radiation irradiation becomes clear, and the area (hatched line) surrounded by the curve (I-1) and the curve (II-1) Within the region, the absorbed dose to the lens is selected and set in accordance with the desired range of the blue cut rate.
具体的にはポリアミド樹脂製のレンズの場合は図２に示されているように、
(１)．ブルーカット率の範囲が２０％〜３５％で、平均ブルーカット率が２８％前後のレンズが得たい場合は、レンズに対して吸収線量を１ｋＧｙ、
(２)．ブルーカット率の範囲が２５％〜４２％で、平均ブルーカット率が３４％前後のレンズが得たい場合は、レンズに対して吸収線量を５ｋＧｙ〜１０ｋＧｙ、
(３)．ブルーカット率の範囲が３５％〜６０％で、平均ブルーカット率が４８％前後のレンズが得たい場合は、レンズに対して吸収線量を１５ｋＧｙ、
(４)．ブルーカット率の範囲が４８％〜７５％で、平均ブルーカット率が６０％前後のレンズが得たい場合は、レンズに対して吸収線量を２０ｋＧｙ〜２５ｋＧｙ、
にすればよいことが分かる。
Specifically, in the case of a lens made of a polyamide resin, as shown in FIG.
(1). If you want a lens with a blue-cut rate range of 20% to 35% and an average blue-cut rate of around 28%, the absorbed dose to the lens is 1 kGy,
(2). If it is desired to obtain a lens with a blue cut rate range of 25% to 42% and an average blue cut rate of around 34%, the absorbed dose to the lens is 5 kGy to 10 kGy,
(3). If you want a lens with a blue cut rate range of 35% to 60% and an average blue cut rate of around 48%, the absorbed dose to the lens is 15 kGy,
(4). If it is desired to obtain a lens with a blue cut rate range of 48% to 75% and an average blue cut rate of around 60%, the absorbed dose to the lens is 20 kGy to 25 kGy,
I know that I should do it.
図３は、ポリカーボネート樹脂を使用して成型したレンズへの吸収線量と光透過率との関係を示す分光透過率特性図である。
図３中の曲線Ａは吸収線量が１ｋＧｙ、曲線Ｂは吸収線量が５ｋＧｙ、曲線Ｃは吸収線量が１０ｋＧｙ、曲線Ｅは吸収線量が２０ｋＧｙ、曲線Ｆは吸収線量が２５ｋＧｙの場合の特性曲線である。なお、吸収線量が１５ｋＧｙの場合の特性曲線は、吸収線量が１０ｋＧｙの場合の特性曲線Ｃと殆ど重なり図面が煩雑になるため、図示を省略した。この図から明らかなように、特に波長４００ｎｍ〜５００ｎｍの範囲（青色光）において、吸収線量を徐々に増すことにより、放射線照射後の光透過率が段階的に落ちている。
この図３の光透過率特性値を基にして、レンズへの吸収線量と波長４００ｎｍ〜５００ｎｍの範囲のブルーカット率(青色光カット率)との関係を図４に示す。
FIG. 3 is a spectral transmittance characteristic diagram showing the relationship between the absorbed dose to a lens molded using a polycarbonate resin and the light transmittance.
The curve A in FIG. 3 is the characteristic curve for the absorbed dose of 1 kGy, the curve B for the absorbed dose of 5 kGy, the curve C for the absorbed dose of 10 kGy, the curve E for the absorbed dose of 20 kGy and the curve F for the absorbed dose of 25 kGy . The characteristic curve in the case where the absorbed dose is 15 kGy overlaps with the characteristic curve C in the case where the absorbed dose is 10 kGy, so the illustration is omitted because the drawing becomes complicated. As is clear from this figure, the light transmittance after radiation irradiation drops stepwise by increasing the absorbed dose gradually, particularly in the wavelength range of 400 nm to 500 nm (blue light).
Based on the light transmittance characteristic value of FIG. 3, the relationship between the absorbed dose to the lens and the blue cut rate (blue light cut rate) in the wavelength range of 400 nm to 500 nm is shown in FIG.
この分光スペクトル測定は、同じ樹脂組成物のレンズに対して同じ放射線照射条件で多数個行い、それらのブルーカット率のバラツキの状態を示している。図中の◆点はブルーカット率の上限値を、▲点は下限値を、■点は平均値をそれぞれ示している。 In this spectrum measurement, a large number of lenses of the same resin composition are subjected to the same radiation irradiation condition, and the state of the variation of the blue cut rate is shown. In the figure, the point ◆ indicates the upper limit value of the blue cut rate, the point ▲ indicates the lower limit value, and the point ■ indicates the average value.
またこの図４は、レンズに対して吸収線量を１，５，１０，１５，２０，２５ｋＧｙ照射したときのブルーカット率の変化を示す特性図であって、同図の複数の◆点どうしを結んだ曲線（Ｉ−２）はＹ＝３０．４８４Ｘ０．１１３７で表わされ、▲点どうしを結んだ曲線（II−２）はＹ＝１９．１６９Ｘ０．１２７８で表わされ、■点どうしを結んだ曲線（III−２）はＹ＝２４．４５６Ｘ０．１２４３で表わされる。ただし、式中のＸは吸収線量（ｋＧｙ）、Ｙはブルーカット率（％）である。 Further, FIG. 4 is a characteristic diagram showing a change in blue cut rate when the absorbed dose is irradiated to the lens at 1, 5, 10, 15, 20, 25 kGy, and a plurality of ♦ points in FIG. The curve (I-2) connected is represented by Y = 30.484 × 0.1137 , and the curve (II-2) obtained by connecting ▲ points is represented by Y = 19.169 × 0.1278 , and ■ point A curve (III-2) connecting the two is represented by Y = 24.456 × 0.1243 . However, X in a formula is absorbed dose (kGy), Y is a blue cut rate (%).
この図４により、ポリカーボネート樹脂製レンズへの吸収線量と、その放射線照射によって得られるブルーカット率幅との関係が明確になり、前記曲線（Ｉ−２）と曲線（II−２）で囲まれる領域（斜線領域）内で、希望するブルーカット率の範囲に応じてレンズに対する吸収線量を選択、設定するようになっている。 From FIG. 4, the relationship between the absorbed dose to the polycarbonate resin lens and the blue cut width obtained by the irradiation becomes clear, and is surrounded by the curve (I-2) and the curve (II-2). In the area (hatched area), the absorbed dose to the lens is selected and set in accordance with the desired range of the blue cut rate.
具体的にはポリカーボネート樹脂製レンズでは図４に示されているように、
(１)．ブルーカット率の範囲が２０％〜３２％で、平均ブルーカット率が２６％前後のレンズが得たい場合は、レンズに対して吸収線量を１ｋＧｙ、
(２)．ブルーカット率の範囲が２３％〜３６％で、平均ブルーカット率が２８％前後のレンズが得たい場合は、レンズに対して吸収線量を５ｋＧｙ、
(３)．ブルーカット率の範囲が２５％〜４０％で、平均ブルーカット率が３３％前後のレンズが得たい場合は、レンズに対して吸収線量を１０ｋＧｙ〜２０ｋＧｙ、
(４)．ブルーカット率の範囲が３２％〜５０％で、平均ブルーカット率が４０％前後のレンズが得たい場合は、レンズに対して吸収線量を２５ｋＧｙ、
にすればよいことが分かる。
Specifically, as shown in FIG. 4 for a polycarbonate resin lens,
(1). If you want to get a lens with a blue cut rate range of 20% to 32% and an average blue cut rate of around 26%, the absorbed dose to the lens is 1 kGy,
(2). If you want to obtain a lens with a blue cut rate range of 23% to 36% and an average blue cut rate of around 28%, the absorbed dose to the lens is 5 kGy,
(3). If you want to obtain a lens with a blue cut rate range of 25% to 40% and an average blue cut rate of around 33%, the absorbed dose to the lens is 10 kGy to 20 kGy,
(4). If you want a lens with a blue cut rate range of 32% to 50% and an average blue cut rate of around 40%, the absorbed dose to the lens is 25 kGy,
I know that I should do it.
図５は、ポリアクリル樹脂を使用して成型したレンズへの吸収線量と光透過率との関係を示す分光透過率特性図である。
図５中の曲線Ａは吸収線量が１ｋＧｙ、曲線Ｂは吸収線量が５ｋＧｙ、曲線Ｃは吸収線量が１０ｋＧｙ、曲線Ｄは吸収線量が１５ｋＧｙ、曲線Ｅは吸収線量が２０ｋＧｙ、曲線Ｆは吸収線量が２５ｋＧｙの場合の特性曲線である。この図から明らかなように、特に波長４００ｎｍ〜５００ｎｍの範囲（青色光）において、吸収線量を徐々に増すことにより、放射線照射後の光透過率が段階的に落ちている。
この図５の光透過率特性値を基にして、レンズへの吸収線量と波長４００ｎｍ〜５００ｎｍの範囲のブルーカット率(青色光カット率)との関係を図６に示す。
FIG. 5 is a spectral transmittance characteristic diagram showing the relationship between the absorbed dose to a lens molded using a polyacrylic resin and the light transmittance.
The curve A in Fig. 5 has an absorbed dose of 1 kGy, the curve B has an absorbed dose of 5 kGy, the curve C has an absorbed dose of 10 kGy, the curve D has an absorbed dose of 15 kGy, the curve E has an absorbed dose of 20 kGy, and the curve F has an absorbed dose It is a characteristic curve in the case of 25 kGy. As is clear from this figure, the light transmittance after radiation irradiation drops stepwise by increasing the absorbed dose gradually, particularly in the wavelength range of 400 nm to 500 nm (blue light).
Based on the light transmittance characteristic value of FIG. 5, the relationship between the absorbed dose to the lens and the blue cut rate (blue light cut rate) in the wavelength range of 400 nm to 500 nm is shown in FIG.
この分光スペクトル測定は、同じ樹脂組成物のレンズに対して同じ放射線照射条件で多数個行い、それらのブルーカット率のバラツキの状態を示している。図中の◆点はブルーカット率の上限値を、▲点は下限値を、■点は平均値をそれぞれ示している。 In this spectrum measurement, a large number of lenses of the same resin composition are subjected to the same radiation irradiation condition, and the state of the variation of the blue cut rate is shown. In the figure, the point ◆ indicates the upper limit value of the blue cut rate, the point ▲ indicates the lower limit value, and the point ■ indicates the average value.
またこの図６は、レンズに対して吸収線量を１，５，１０，１５，２０，２５ｋＧｙ照射したときのブルーカット率の変化を示す特性図であって、同図の複数の◆点どうしを結んだ曲線（Ｉ−３）はＹ＝８．０７９４Ｘ０．３６１９で表わされ、▲点どうしを結んだ曲線（II−３）はＹ＝５．８２５９Ｘ０．３３で表わされ、■点どうしを結んだ曲線（III−３）はＹ＝６．６４９８Ｘ０．３６６９で表わされる。ただし、式中のＸは吸収線量（ｋＧｙ）、Ｙはブルーカット率（％）である。 Further, FIG. 6 is a characteristic diagram showing a change in blue cut rate when the absorbed dose is irradiated to the lens at 1, 5, 10, 15, 20, 25 kGy, and a plurality of ♦ points in FIG. The curve (I-3) connected is represented by Y = 8.0794 × 0.3619 , and the curve (II-3) connected ▲ points is represented by Y = 5.8259 × 0.33 , and ■ point The curve connecting (III-3) is represented by Y = 6.6498 × 0.3669 . However, X in a formula is absorbed dose (kGy), Y is a blue cut rate (%).
この図６により、ポリアクリル樹脂製レンズへの吸収線量と、その放射線照射によって得られるブルーカット率幅との関係が明確になり、前記曲線（Ｉ−３）と曲線（II−３）で囲まれる領域（斜線領域）内で、希望するブルーカット率の範囲に応じてレンズに対する吸収線量を選択、設定するようになっている。 From FIG. 6, the relationship between the absorbed dose to the polyacrylic resin lens and the blue cut width obtained by the irradiation becomes clear, and is surrounded by the curve (I-3) and the curve (II-3). The absorbed dose to the lens is selected and set in accordance with the desired range of the blue cut rate within the area (hatched area).
具体的にはポリアクリル樹脂製レンズでは図６に示されているように、
(１)．ブルーカット率の範囲が５％〜１３％で、平均ブルーカット率が９％前後のレンズが得たい場合は、レンズに対して吸収線量を１ｋＧｙ〜５ｋＧｙ、
(２)．ブルーカット率の範囲が１０％〜２３％で、平均ブルーカット率が１６％前後のレンズが得たい場合は、レンズに対して吸収線量を１０ｋＧｙ〜１５ｋＧｙ、
(３)．ブルーカット率の範囲が１５％〜３０％で、平均ブルーカット率が２２％前後のレンズが得たい場合は、レンズに対して吸収線量を２０ｋＧｙ〜２５ｋＧｙ、
にすればよいことが分かる。
前記実施例ではメガネ用レンズの場合について説明したが、その他例えばパソコンやスマートフォンやタブレット端末などの表示装置用の光透過性表示板、あるいは光源としてＬＥＤを使用した機器の光透過部材、カメラ用レンズ、光学系フィルターなど各種分野において、ブルーカット率幅が異なる場合の電離性放射線の照射条件を特定する場合にも適用可能である。
また、電離性放射線は物質透過性が非常に高いことから、光透過性プラスチック部材を複数枚（複数個）重ねて、電離性放射線を同時に照射することも可能である。
Specifically, as shown in FIG. 6 for a polyacrylic resin lens,
(1). If it is desired to obtain a lens with a blue cut rate range of 5% to 13% and an average blue cut rate of around 9%, the absorbed dose to the lens is 1 kGy to 5 kGy,
(2). If you want to obtain a lens with a blue cut rate range of 10% to 23% and an average blue cut rate of around 16%, the absorbed dose to the lens is 10 kGy to 15 kGy,
(3). If it is desired to obtain a lens with a blue cut rate range of 15% to 30% and an average blue cut rate of around 22%, the absorbed dose to the lens is 20 kGy to 25 kGy,
I know that I should do it.
Although the case of the lens for glasses has been described in the above-mentioned embodiment, other than the above, for example, a light transmissive display plate for display devices such as personal computers, smartphones and tablet terminals, or a light transmitting member of equipment using LED as a light source, lens for camera In various fields, such as an optical system filter, it is applicable also when specifying irradiation conditions of ionizing radiation in case blue cut rate width differs.
In addition, since ionizing radiation has a very high material permeability, it is possible to stack a plurality of light transmitting plastic members and simultaneously irradiate the ionizing radiation.
本発明は、光透過性プラスチック部材に電離性放射線を直接照射することもできるし、さらにまた、電離性放射線は物質透過性が非常に高いことから、光透過性プラスチック部材の表面に、例えばハードコート膜、反射防止膜、反射膜、汚れや水やけを防止する付着防止膜、偏光膜、平滑膜などの機能性膜を形成した後、その機能性膜の上から光透過性プラスチック部材に対して電離性放射線を照射することもできる。 According to the present invention, the light transmitting plastic member can be directly irradiated with ionizing radiation, and furthermore, since the ionizing radiation has a very high material permeability, the surface of the light transmitting plastic member is, for example, hard. After forming a functional film such as a coating film, an antireflective film, a reflective film, an adhesion preventing film for preventing dirt and water, a polarizing film, a smooth film, etc., the light transmitting plastic member is from above the functional film Can also be irradiated with ionizing radiation.
さらにまた、レンズをメガネフレームに一体に組み込んだ状態、パソコンやタブレット端末などのように光透過性の表示板を表示装置に組み込んだ状態、あるいは照明カバーのように光源としてＬＥＤを使用した機器本体に組み込んだ状態などのように、光透過性プラスチック部材が他の部材と一体になっている状態で、その光透過性プラスチック部材に対して電離性放射線を照射することもできる。 Furthermore, a state in which the lens is integrally incorporated in the eyeglass frame, a state in which a light transmissive display plate is incorporated in the display device such as a personal computer or tablet terminal, or an apparatus body using an LED as a light source like a lighting cover The light transmitting plastic member can be irradiated with ionizing radiation in a state where the light transmitting plastic member is integrated with other members, as in the state of being incorporated in the above.
Claims (9)
前記電離性放射線の照射線量（Ｘ）と前記青色光のカット率（Ｙ）の関係から求めた、下記の式（I−１）で示されるＸ−Ｙ関係曲線と、下記の式（II−１）で示されるＸ−Ｙ関係曲線で囲まれた領域の中から、前記所望のカット率（Ｙ）に適合する前記電離性放射線の照射線量（Ｘ）を選択して、その電離性放射線の照射線量（Ｘ）を前記光透過性プラスチック部材に照射することを特徴とする光透過性プラスチック部材の青色光カット方法。
Ｙ＝２９．９８４Ｘ０．２５１１・・・・（I−１）
Ｙ＝１９．３５２Ｘ０．２５８３・・・・（II−１） By irradiating the light transmitting plastic member made of a polyamide resin with ionizing radiation, blue light having a wavelength of 400 nm to 500 nm of the light passing through the light transmitting plastic member is cut at a desired cutting rate In the method of cutting blue light of a light transmitting plastic member,
An XY relationship curve represented by the following equation (I-1), which is obtained from the relationship between the irradiation dose (X) of the ionizing radiation and the cut rate (Y) of the blue light, and the following equation (II) From the region enclosed by the XY relationship curve shown in 1), select the irradiation dose (X) of the ionizing radiation that matches the desired cut rate (Y), and A blue light cutting method for a light transmitting plastic member, comprising irradiating the light transmitting plastic member with an irradiation dose (X).
Y = 29.984X 0.2511 ... (I-1)
Y = 19.352 × 0.2583・ ・ ・ (II-1)
前記電離性放射線の照射線量（Ｘ）と前記青色光のカット率（Ｙ）の関係から求めた、下記の式（I−２）で示されるＸ−Ｙ関係曲線と、下記の式（II−２）で示されるＸ−Ｙ関係曲線で囲まれた領域の中から、前記所望のカット率（Ｙ）に適合する前記電離性放射線の照射線量（Ｘ）を選択して、その電離性放射線の照射線量（Ｘ）を前記光透過性プラスチック部材に照射することを特徴とする光透過性プラスチック部材の青色光カット方法。
Ｙ＝３０．４８４Ｘ０．１１３７・・・・（I−２）
Ｙ＝１９．１６９Ｘ０．１２７８・・・・（II−２） By irradiating the light transmitting plastic member made of polycarbonate resin with ionizing radiation, blue light having a wavelength of 400 nm to 500 nm of the light passing through the light transmitting plastic member is cut at a desired cutting rate In the method of cutting blue light of a light transmitting plastic member,
An XY relationship curve represented by the following equation (I-2), which is obtained from the relationship between the irradiation dose (X) of the ionizing radiation and the cut rate (Y) of the blue light, and the following equation (II) From the region enclosed by the XY relationship curve shown in 2), select the radiation dose (X) of the ionizing radiation that matches the desired cut rate (Y), and A blue light cutting method for a light transmitting plastic member, comprising irradiating the light transmitting plastic member with an irradiation dose (X).
Y = 30.484 X 0.1137 ... (I-2)
Y = 19.169 X 0.1278 .. (II-2)
前記電離性放射線の照射線量（Ｘ）と前記青色光のカット率（Ｙ）の関係から求めた、下記の式（I−３）で示されるＸ−Ｙ関係曲線と、下記の式（II−３）で示されるＸ−Ｙ関係曲線で囲まれた領域の中から、前記所望のカット率（Ｙ）に適合する前記電離性放射線の照射線量（Ｘ）を選択して、その電離性放射線の照射線量（Ｘ）を前記光透過性プラスチック部材に照射することを特徴とする光透過性プラスチック部材の青色光カット方法。
Ｙ＝８．０７９４Ｘ０．３６１９・・・・（I−３）
Ｙ＝５．８２５９Ｘ０．３３・・・・・（II−３） By irradiating the light transmitting plastic member made of polyacrylic resin with ionizing radiation, the blue light having a wavelength of 400 nm to 500 nm of the light passing through the light transmitting plastic member is desired to be cut. In a blue light cutting method of a light transmitting plastic member to be cut,
An XY relationship curve represented by the following equation (I-3), which is obtained from the relationship between the irradiation dose (X) of the ionizing radiation and the cut rate (Y) of the blue light, and the following equation (II) From the region enclosed by the XY relationship curve shown in 3), select the irradiation dose (X) of the ionizing radiation that matches the desired cut rate (Y) A blue light cutting method for a light transmitting plastic member, comprising irradiating the light transmitting plastic member with an irradiation dose (X).
Y = 8.0794 X 0.3619 · · · (I-3)
Y = 5.8259 X 0.33 .... (II-3)
（１）．前記青色光の所望のカット率の範囲が２０％〜３５％の場合は、前記光透過性プラスチック部材に対して吸収線量を１ｋＧｙ、
（２）．前記青色光の所望のカット率の範囲が２５％〜４２％の場合は、前記光透過性プラスチック部材に対して吸収線量を５ｋＧｙ〜１０ｋＧｙ、
（３）．前記青色光の所望のカット率の範囲が３５％〜６０％の場合は、前記光透過性プラスチック部材に対して吸収線量を１５ｋＧｙ、
（４）．前記青色光の所望のカット率の範囲が４８％〜７５％の場合は、前記光透過性プラスチック部材に対して吸収線量を２０ｋＧｙ〜２５ｋＧｙ、
とすることを特徴とする光透過性プラスチック部材の青色光カット方法。 In the blue light cutting method of the light transmitting plastic member according to claim 1,
(1). When the range of the desired cut rate of the blue light is 20% to 35%, the absorbed dose to the light transmitting plastic member is 1 kGy,
(2). When the desired cut rate range of the blue light is 25% to 42%, the absorbed dose to the light transmitting plastic member is 5 kGy to 10 kGy,
(3). When the range of the desired cut rate of the blue light is 35% to 60%, the absorbed dose to the light transmitting plastic member is 15 kGy,
(4). When the range of the desired cut rate of the blue light is 48% to 75%, the absorbed dose to the light transmitting plastic member is 20 kGy to 25 kGy,
A blue light cutting method of a light transmitting plastic member characterized in that
（１）．前記青色光の所望のカット率の範囲が２０％〜３２％の場合は、前記光透過性プラスチック部材に対して吸収線量を１ｋＧｙ、
（２）．前記青色光の所望のカット率の範囲が２３％〜３６％の場合は、前記光透過性プラスチック部材に対して吸収線量を５ｋＧｙ、
（３）．前記青色光の所望のカット率の範囲が２５％〜４０％の場合は、前記光透過性プラスチック部材に対して吸収線量を１０ｋＧｙ〜２０ｋＧｙ、
（４）．前記青色光の所望のカット率の範囲が３２％〜５０％の場合は、前記光透過性プラスチック部材に対して吸収線量を２５ｋＧｙ、
とすることを特徴とする光透過性プラスチック部材の青色光カット方法。 In the blue light cutting method of the light transmitting plastic member according to claim 2,
(1). When the range of the desired cut rate of the blue light is 20% to 32%, the absorbed dose is 1 kGy to the light transmitting plastic member,
(2). When the desired cut rate range of the blue light is 23% to 36%, the absorbed dose to the light transmitting plastic member is 5 kGy,
(3). When the range of the desired cutting rate of the blue light is 25% to 40%, the absorbed dose to the light transmitting plastic member is 10 kGy to 20 kGy,
(4). When the range of the desired cut rate of the blue light is 32% to 50%, the absorbed dose to the light transmitting plastic member is 25 kGy,
A blue light cutting method of a light transmitting plastic member characterized in that
（１）．前記青色光の所望のカット率の範囲が５％〜１３％の場合は、前記光透過性プラスチック部材に対して吸収線量を１ｋＧｙ〜５ｋＧｙ、
（２）．前記青色光の所望のカット率の範囲が１０％〜２３％の場合は、前記光透過性プラスチック部材に対して吸収線量を１０ｋＧｙ〜１５ｋＧｙ、
（３）．前記青色光の所望のカット率の範囲が１５％〜３０％の場合は、前記光透過性プラスチック部材に対して吸収線量を２０ｋＧｙ〜２５ｋＧｙ、
とすることを特徴とする光透過性プラスチック部材の青色光カット方法。 In the blue light cutting method of the light transmitting plastic member according to claim 3,
(1). When the range of the desired cutting rate of the blue light is 5% to 13%, the absorbed dose to the light transmitting plastic member is 1 kGy to 5 kGy,
(2). When the range of the desired cut rate of the blue light is 10% to 23%, the absorbed dose to the light transmitting plastic member is 10 kGy to 15 kGy,
(3). When the range of the desired cut rate of the blue light is 15% to 30%, the absorbed dose to the light transmitting plastic member is 20 kGy to 25 kGy,
A blue light cutting method of a light transmitting plastic member characterized in that
前記光透過性プラスチック部材の表面に機能性膜を形成した後、その機能性膜の上から光透過性プラスチック部材に対して電離性放射線を照射することを特徴とする光透過性プラスチック部材の青色光カット方法。 In the blue light cutting method of the light transmitting plastic member according to any one of claims 1 to 6,
After forming a functional film on the surface of the light transmitting plastic member, ionizing radiation is irradiated onto the light transmitting plastic member from above the functional film, and the blue color of the light transmitting plastic member is characterized. How to cut light.
前記光透過性プラスチック部材が他の部材と一体になっている状態で、前記光透過性プラスチック部材に対して電離性放射線を照射することを特徴とする光透過性プラスチック部材の青色光カット方法。 In the blue light cutting method of the light transmitting plastic member according to any one of claims 1 to 6,
A method of cutting blue light of a light transmitting plastic member, comprising irradiating the light transmitting plastic member with ionizing radiation in a state where the light transmitting plastic member is integrated with another member.
The light transmitting plastic member according to any one of claims 1 to 8 is a lens for glasses, a light transmitting display plate for a display device, a light transmitting member of an apparatus using an LED as a light source, a lens for a camera And a method of cutting blue light from a light transmitting plastic member, which is an optical system filter.
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