JP2006330677A - Method of cutting spectacle lens and spectacle lens - Google Patents
Method of cutting spectacle lens and spectacle lens Download PDFInfo
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- JP2006330677A JP2006330677A JP2006020550A JP2006020550A JP2006330677A JP 2006330677 A JP2006330677 A JP 2006330677A JP 2006020550 A JP2006020550 A JP 2006020550A JP 2006020550 A JP2006020550 A JP 2006020550A JP 2006330677 A JP2006330677 A JP 2006330677A
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- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 2
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- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
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- 230000001174 ascending effect Effects 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- SYFOAKAXGNMQAX-UHFFFAOYSA-N bis(prop-2-enyl) carbonate;2-(2-hydroxyethoxy)ethanol Chemical compound OCCOCCO.C=CCOC(=O)OCC=C SYFOAKAXGNMQAX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
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- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
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- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/146—Accessories, e.g. lens mounting devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Eyeglasses (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
本発明は、眼鏡レンズの切削方法及び眼鏡レンズに関し、特に眼鏡レンズを加工する際に軸ずれを起こすことが無い眼鏡レンズの切削方法及び眼鏡レンズに関する。 TECHNICAL FIELD The present invention relates to a spectacle lens cutting method and spectacle lens, and more particularly to a spectacle lens cutting method and spectacle lens that do not cause axial misalignment when the spectacle lens is processed.
眼鏡レンズは、円形の厚版レンズを眼鏡枠の形状に合わせるように玉型に切削加工して使用される。一方、眼鏡レンズの表面には傷防止のためのハードコート膜や反射防止膜の他に最表層に水ヤケ防止のための撥水性膜が施されている。近年、撥水性を備えた滑り性の良い水ヤケ防止膜が多く用いられるようになっている。レンズを玉型加工する際に、前述したような撥水性が良好なレンズ表面に、従来法によるエチレン−ビニルアセテートコポリマーなどからなるレンズ加工用両面テープを用いて加工を行った場合、レンズ表面の滑りが良いために、レンズ表面とサクションカップ又はレンズ加工用両面テープの間で滑りが起こり、軸ずれが生じやすい。このため滑り性の良好な表面を持つレンズに対しては、一般的に、ポリエステルなどのフイルムで作製される粘着テープをレンズ片面または両面に貼り、その上からサクションカップ又はレンズ加工用両面テープを貼着することで軸ずれを防止している(特許文献1参照)。 The spectacle lens is used by cutting a circular thick plate lens into a target lens shape so as to match the shape of the spectacle frame. On the other hand, on the surface of the spectacle lens, in addition to a hard coat film and an antireflection film for preventing scratches, a water-repellent film for preventing water scum is provided on the outermost layer. In recent years, water-repellent anti-sparkling films having water repellency have been often used. When processing the lens into a lens shape, if the lens surface with good water repellency as described above is processed using a double-sided tape for lens processing made of a conventional method such as ethylene-vinyl acetate copolymer, Due to the good slippage, slippage occurs between the lens surface and the suction cup or the double-sided tape for lens processing, and an axial deviation is likely to occur. For this reason, for lenses having a surface with good slipperiness, an adhesive tape made of a film such as polyester is generally applied to one or both sides of the lens, and then a suction cup or a double-sided tape for lens processing is applied to the lens. Axial misalignment is prevented by sticking (see Patent Document 1).
しかしながら、特許文献1に記載の方法では、レンズの曲率半径が小さい形状の表面に粘着テープを貼った場合は粘着テープにしわが入ったり、レンズ表面と粘着テープの間に空気が入ったりすることで、玉型加工時に粘着テープの付着力低下を引き起こし、加工軸ずれを生じる場合がある。また粘着テープの大きさが加工玉型より大きいと、加工時にレンズと研削ツールの隙間にテープが挟まり、加工精度を低下させ、加工機の冷却水の排水口にテープ加工片が詰まるなどの問題が生じるため、一般的には粘着テープの大きさは切削されたレンズ形状より小さくなっている。このためレンズ表面と粘着テープの接触面積が小さくなり、レンズ度数が高いレンズなどのように加工時の負荷抵抗が大きい場合は、軸ずれを引き起こす場合がある。
また、特許文献1に開示されている粘着テープを使用した方法では、前もってレンズ度数の測定、光学中心及び乱視軸のマーキングを行い、その後に粘着テープを貼付する工程となるため、取り扱い時にキズを生じる機会が多くなる。
さらに、撥水性の良好なレンズの表面は水系やアルコール系の液体の濡れ性が悪く、レンズ表面で塗膜溶液が弾かれ、均一な透明膜を塗布することが難しいという問題があった。
また、特許文献2には、軸ずれ防止手段として、レンズの表面に塗布することにより、レンズ表面に密着固定される被膜を形成するための被膜形成剤と、所定強度を有する支持体と前記被膜上に貼着可能な粘着剤を少なくとも有する粘着テープから構成されるキットを用いることが開示され、前記被膜形成剤は合成樹脂と溶剤を含有し、合成樹脂として酢酸ビニルが、溶剤としてメタノールが好ましいと開示されている。
しかしながら、特許文献2記載のように、合成樹脂として酢酸ビニルを、溶剤としてメタノールを用いて被膜を形成した場合、皮膜に凹凸が生じて均一な膜が形成できず、皮膜形成後、レンズメータによる度数測定が困難という課題を有していた。
このような状況下において、撥水性を備え、滑り性の高いレンズの加工時に軸ずれを抑え、作業効率の良い切削加工方法が望まれていた。
Moreover, in the method using the adhesive tape disclosed in Patent Document 1, the lens power is measured in advance, the optical center and the astigmatism axis are marked, and then the adhesive tape is applied, so that scratches may occur during handling. More opportunities arise.
Furthermore, the lens surface with good water repellency has poor wettability with water-based and alcohol-based liquids, and the coating solution is repelled on the lens surface, which makes it difficult to apply a uniform transparent film.
In addition, Patent Document 2 discloses a film forming agent for forming a film that is tightly fixed to the lens surface by being applied to the surface of the lens as an axis deviation preventing means, a support having a predetermined strength, and the film. Disclosed is a kit composed of an adhesive tape having at least an adhesive that can be attached thereon, wherein the film-forming agent contains a synthetic resin and a solvent, vinyl acetate as the synthetic resin, and methanol as the solvent. It is disclosed.
However, as described in Patent Document 2, when a film is formed using vinyl acetate as a synthetic resin and methanol as a solvent, unevenness is generated in the film, and a uniform film cannot be formed. There was a problem that frequency measurement was difficult.
Under such circumstances, there has been a demand for a cutting method with high work efficiency that suppresses axial misalignment when processing a lens having water repellency and high slipperiness.
本発明は前記の課題を解決するためなされたもので、撥水性を有するレンズを眼鏡枠に入れるための玉型加工等の切削加工を行う際に、軸ずれを引き起こすことがなく、作業効率の良い眼鏡レンズの切削方法及び眼鏡レンズを提供することを目的とするものである。 The present invention has been made in order to solve the above-described problems. When performing a cutting process such as a lens shape process for putting a lens having water repellency into a spectacle frame, it does not cause an axis shift, and the work efficiency is improved. It is an object of the present invention to provide a good spectacle lens cutting method and spectacle lens.
本発明者等は、前記目的を達成するために鋭意研究を重ねた結果、撥水性薄膜を施したレンズ表面に、塩素化ポリプロピレン又は塩素化ポリエチレンからなる樹脂製被膜を形成することにより、軸ずれを引き起こすことがなく眼鏡レンズが切削でき、前記樹脂製被膜は透明性を有するために、玉型加工等の切削加工を行う際に、被膜が形成された状態で度数測定、マーキングが行えるため、傷付きも防止されることを見いだし、本発明を完成するに至ったものである。 As a result of intensive research to achieve the above object, the present inventors have formed a resin film made of chlorinated polypropylene or chlorinated polyethylene on the surface of the lens to which the water-repellent thin film has been applied. Spectacle lenses can be cut without causing, since the resin film has transparency, when performing cutting processing such as target processing, frequency measurement and marking can be performed with the film formed, It has been found that scratching can be prevented and the present invention has been completed.
すなわち、本発明は、撥水性薄膜を施したレンズ表面に、塩素化ポリプロピレン又は塩素化ポリエチレンからなる樹脂製被膜を形成する工程と、該樹脂製被膜上にレンズ加工用両面テープを貼着する工程と、前記レンズを切削加工する工程とを有する眼鏡レンズの切削方法、並びに、撥水性薄膜を施したレンズ表面に、塩素化ポリプロピレン又は塩素化ポリエチレンからなる樹脂製被膜を形成してなる眼鏡レンズを提供するものである。 That is, the present invention includes a step of forming a resin film made of chlorinated polypropylene or chlorinated polyethylene on a lens surface provided with a water-repellent thin film, and a step of attaching a double-sided tape for lens processing on the resin film. And a method of cutting a spectacle lens having a step of cutting the lens, and a spectacle lens formed by forming a resin film made of chlorinated polypropylene or chlorinated polyethylene on a lens surface provided with a water-repellent thin film. It is to provide.
本発明の眼鏡レンズの切削方法によれば、撥水性を有する眼鏡レンズを切削加工する際に、軸ずれを引き起こすことがなく正確な加工ができる。 According to the spectacle lens cutting method of the present invention, when cutting spectacle lenses having water repellency, accurate processing can be performed without causing an axis shift.
本発明の眼鏡レンズの切削方法は、撥水性薄膜を施したレンズ表面に、塩素化ポリプロピレン又は塩素化ポリエチレンからなる樹脂製被膜を形成する工程と、該樹脂製被膜上にレンズ加工用両面テープを貼着する工程と、前記レンズを切削加工する工程とを有する。
また、本発明の眼鏡レンズは、撥水性薄膜を施したレンズ表面に、塩素化ポリプロピレン又は塩素化ポリエチレンからなる樹脂製被膜を形成してなるものである。
本発明に用いられるレンズとしては、特に限定されず、ガラスレンズ、プラスチックレンズのいずれにも適用でき、硬化膜や反射防止膜等が施されていてもよい。この硬化膜の材料としては、特に限定されず、公知の有機ケイ素化合物及び金属酸化物コロイド粒子よりなるコーティング組成物を使用することができる。前記反射防止膜の材質及び形成方法は特には限定されず、従来より知られている無機酸化物よりなる単層、多層膜を使用することができる。
また、レンズ表面に施される撥水性薄膜の種類及び形成方法は、特に限定されず、例えば、特開2005-3817号公報に記載されているような含フッ素シラン化合物等の撥水処理剤を用いて、真空蒸着等の公知の方法で形成すればよい。また、前記樹脂製被膜が撥水性薄膜から、より容易に剥がれやすくするため、撥水性薄膜は、撥水性に加え良好な撥油性を兼ね備えた材質からなることが好ましい。
The spectacle lens cutting method of the present invention comprises a step of forming a resin film made of chlorinated polypropylene or chlorinated polyethylene on a lens surface provided with a water-repellent thin film, and a lens processing double-sided tape on the resin film. A step of attaching, and a step of cutting the lens.
Further, the spectacle lens of the present invention is formed by forming a resin film made of chlorinated polypropylene or chlorinated polyethylene on the surface of a lens to which a water-repellent thin film has been applied.
The lens used in the present invention is not particularly limited, and can be applied to either a glass lens or a plastic lens, and may be provided with a cured film, an antireflection film, or the like. The material for the cured film is not particularly limited, and a coating composition comprising a known organosilicon compound and metal oxide colloidal particles can be used. The material and formation method of the antireflection film are not particularly limited, and single-layer and multi-layer films made of inorganic oxides conventionally known can be used.
Further, the type and formation method of the water-repellent thin film applied to the lens surface are not particularly limited. For example, a water-repellent treatment agent such as a fluorine-containing silane compound as described in JP-A-2005-3817 is used. And may be formed by a known method such as vacuum deposition. In order to make the resin coating more easily peeled off from the water-repellent thin film, the water-repellent thin film is preferably made of a material having good oil repellency in addition to water repellency.
前記塩素化ポリプロピレンからなる樹脂製被膜は、塩素化ポリプロピレンと溶媒とを含有した塩素化ポリプロピレン溶液からなる被膜形成剤を用いて形成されると好ましく、前記塩素化ポリエチレンからなる樹脂製被膜は、塩素化ポリエチレンと溶媒とを含有した塩素化ポリエチレン溶液からなる被膜形成剤を用いて形成されると好ましい。
以下、塩素化ポリプロピレン溶液と塩素化ポリエチレン溶液を総称して被膜形成剤ということがある。
The resin film made of chlorinated polypropylene is preferably formed using a film forming agent made of a chlorinated polypropylene solution containing chlorinated polypropylene and a solvent, and the resin film made of chlorinated polyethylene is chlorine. Preferably, it is formed using a film forming agent comprising a chlorinated polyethylene solution containing a chlorinated polyethylene and a solvent.
Hereinafter, the chlorinated polypropylene solution and the chlorinated polyethylene solution may be collectively referred to as a film forming agent.
本発明で用いる被膜形成剤は、レンズ表面に樹脂製被膜を形成するための溶液であり、被膜形成剤における塩素化ポリプロピレン及び塩素化ポリエチレン(溶質)の濃度は、それぞれについて被膜形成剤全量を基準にして、通常5〜40質量%、好ましくは15〜25質量%である。また、塩素化ポリプロピレン、塩素化ポリエチレンの重量平均分子量は、通常4〜10万、好ましくは6〜8万である。また、被膜形成剤の固形分濃度は、通常5〜40質量%、好ましくは15〜25質量%である。
前記塩素化ポリエチレンとはポリエチレンに塩素を付加させたもの、塩素化ポリプロピレンとはポリプロピレンに塩素を付加させたものである。
前記塩素化ポリプロピレン、塩素化ポリエチレンに対する溶媒としては、特に限定されないが、例えば、芳香族炭化水素、塩素化炭化水素、エステル類、ケトン類及び脂環式炭化水素を有する脂肪族炭化水素化合物から選ばれる一種以上を用いれば好ましい。
前記芳香族炭化水素の例としては、トルエン、キシレン等が挙げられ、前記塩素化炭化水素の例としては、塩化メチル、塩化メチレン、クロロホルム、トリクロロエチレン、テトラクロロエチレン等が挙げられ、前記エステル類の例としては、酢酸エステル類、プロピオン酸エステル類等が挙げられ、前記ケトン類の例としては、メチルエチルケトン、メチルイソブチルケトン、ジイソブチルケトン、アセトン等が挙げられ、前記脂環式炭化水素を含有する脂肪族炭化水素の例としては、シクロヘキサン、メチルシクロヘキサン、エチルシクロヘキサン等が挙げられる。
The film forming agent used in the present invention is a solution for forming a resin film on the lens surface, and the concentrations of chlorinated polypropylene and chlorinated polyethylene (solute) in the film forming agent are based on the total amount of the film forming agent for each. Thus, it is usually 5 to 40% by mass, preferably 15 to 25% by mass. Moreover, the weight average molecular weights of chlorinated polypropylene and chlorinated polyethylene are usually 40,000 to 100,000, preferably 60,000 to 80,000. Moreover, the solid content concentration of the film forming agent is usually 5 to 40% by mass, preferably 15 to 25% by mass.
The chlorinated polyethylene is obtained by adding chlorine to polyethylene, and the chlorinated polypropylene is obtained by adding chlorine to polypropylene.
Solvents for the chlorinated polypropylene and chlorinated polyethylene are not particularly limited, but are selected from, for example, aromatic hydrocarbons, chlorinated hydrocarbons, esters, ketones, and aliphatic hydrocarbon compounds having alicyclic hydrocarbons. It is preferable to use one or more of the above.
Examples of the aromatic hydrocarbon include toluene, xylene and the like, and examples of the chlorinated hydrocarbon include methyl chloride, methylene chloride, chloroform, trichloroethylene, tetrachloroethylene and the like, and examples of the esters Examples include acetic acid esters and propionic acid esters, and examples of the ketones include methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, and acetone, and aliphatic carbons containing the alicyclic hydrocarbons. Examples of hydrogen include cyclohexane, methylcyclohexane, ethylcyclohexane and the like.
また、本発明で用いる被膜形成剤は、必要に応じ、界面活性剤を添加しても良く、シリコーン系界面活性剤及び/又はフッ素系界面活性剤が好ましい。界面活性剤を添加することにより、形成被膜に凹凸がなく、より均一な膜となり、度数測定がより容易になる。
前記界面活性剤の添加量としては、被膜形成剤全量を基準にして、通常0.01〜5質量%、好ましくは0.1〜1質量%である。
前記シリコーン系界面活性剤としては、下記一般式(1)〜(4)の様な例が挙げられ、重合度及び変性率を変えることにより、低粘度液状から高粘度ペースト状、又は固体状のシリコーンにすることができ、また有機基Xにより任意の親水性を付与することができる。
Further, the film forming agent used in the present invention may be added with a surfactant as necessary, and a silicone surfactant and / or a fluorine surfactant is preferable. By adding the surfactant, the formed film has no unevenness and becomes a more uniform film, and the frequency measurement becomes easier.
The addition amount of the surfactant is usually 0.01 to 5% by mass, preferably 0.1 to 1% by mass, based on the total amount of the film forming agent.
Examples of the silicone-based surfactant include the following general formulas (1) to (4). By changing the polymerization degree and the modification rate, the low-viscosity liquid to the high-viscosity paste or solid Silicone can be used, and any hydrophilicity can be imparted by the organic group X.
前記各一般式(1)〜(4)において、mは1以上の整数、nは1以上の整数である。
有機基Xとしては、下記ポリエーテル系、ポリグリセリン系、ピロリドン系、ベタイン系、硫酸塩、リン酸塩及び4級アミン塩等が挙げられる。
ポリエーテル系:−C3H6O(C2H4O)a(C3H6O)bR[aは1以上の整数、bは1以上の整数、Rは有機基である。]
ポリグリセリン系:−C3H6O(CH2CH(OH)CH2O)cH[cは1以上の整数。]
ピロリドン系:
硫酸塩:−C3H6O(C2H4O)aSO3Na[aは1以上の整数。]
リン酸塩:−C3H6O(C2H4O)aPO3Na[aは1以上の整数。]
4級アミン塩:−C3H6N+(CH3)3・Cl-
In each of the general formulas (1) to (4), m is an integer of 1 or more, and n is an integer of 1 or more.
Examples of the organic group X include the following polyethers, polyglycerols, pyrrolidones, betaines, sulfates, phosphates, and quaternary amine salts.
Polyether type: —C 3 H 6 O (C 2 H 4 O) a (C 3 H 6 O) b R [a is an integer of 1 or more, b is an integer of 1 or more, and R is an organic group. ]
Polyglycerin type: —C 3 H 6 O (CH 2 CH (OH) CH 2 O) c H [c is an integer of 1 or more. ]
Pyrrolidone series:
Sulfate: —C 3 H 6 O (C 2 H 4 O) a SO 3 Na [a is an integer of 1 or more. ]
Phosphate: -C 3 H 6 O (C 2 H 4 O) a PO 3 Na [a is an integer of 1 or more. ]
Quaternary amine salt: —C 3 H 6 N + (CH 3 ) 3 · Cl −
また、前記フッ素系界面活性剤としては、例えば、アニオン系 ノニオン系 カチオン系 両性イオン系等が挙げられる。 Examples of the fluorine-based surfactant include an anionic nonionic cationic cationic amphoteric ion.
以上のような被膜形成剤を用いて、撥水性薄膜を施したレンズ表面に、樹脂製被膜を形成するが、樹脂製被膜の形成方法としては、例えば、スピンコーティング法や浸漬塗布法を用いることができ、浸漬塗布法で形成することが好ましい。具体的には浸漬塗布法により、通常、上昇速度50mm/min〜1000mm/min、好ましくは150mm/min〜600mm/minで、レンズの切削加工もしくは玉型加工に用いる軸部材によりレンズが固定される部分よりも広い面積に塗布するが、取り扱いキズを減らすという観点からはレンズ全面に塗布することが好ましい。塗布後、溶媒が揮発するとレンズ表面に密着固定された樹脂製被膜が形成される。
なお、従来、透明性を有する被膜を得るためには、被膜の膜厚ムラをなくし、膜中への気泡を排除する必要があったが、本発明では塩素化ポリプロピレン又は塩素化ポリエチレンを上記のような高揮発性の溶媒に溶解させた溶液を用いることで、例えば、浸漬後の引き上げ時にレンズ表面に形成された被膜からの溶媒の揮発が早いため、塗布溶液の粘度が高くなり、撥水膜による弾きは抑えられる。このため溶液の粘度も必要以上に高くする必要がなく、均一で透明な膜を得ることが可能となる。
A resin film is formed on the surface of the lens subjected to the water-repellent thin film using the film forming agent as described above. As a method for forming the resin film, for example, a spin coating method or a dip coating method is used. It is preferable to form by a dip coating method. Specifically, by a dip coating method, the lens is usually fixed at a rising speed of 50 mm / min to 1000 mm / min, preferably 150 mm / min to 600 mm / min, by a shaft member used for lens cutting or lens processing. Although it is applied to an area larger than the portion, it is preferably applied to the entire lens surface from the viewpoint of reducing handling scratches. After application, when the solvent is volatilized, a resin film is formed that is tightly fixed to the lens surface.
Conventionally, in order to obtain a film having transparency, it has been necessary to eliminate film thickness unevenness and eliminate bubbles in the film. In the present invention, chlorinated polypropylene or chlorinated polyethylene is used as described above. By using a solution dissolved in such a highly volatile solvent, for example, the solvent is quickly volatilized from the film formed on the lens surface at the time of pulling up after immersion. Playing with the membrane is suppressed. For this reason, it is not necessary to increase the viscosity of the solution more than necessary, and a uniform and transparent film can be obtained.
本発明においては、前記樹脂製被膜が形成された後、該樹脂製被膜上にレンズ加工用両面テープを貼着し、レンズの切削加工を行う。
レンズ加工用両面テープとしては、特に限定されず公知のものを用いればよく、例えば、商品名:リープテープ(住友3M(株)製)、商品名:ブロッキングパット(株式会社サイモン製)等が知られている。
また、レンズを切削する加工機械としては、特に限定されず公知の機械を用いればよく、眼鏡小売店等で使用されている機械や、加工業者が使用している機械を使用することができる。
切削加工後の眼鏡レンズにおいて、樹脂製被膜が不要の場合には、樹脂製被膜の端を指でつまむなどして容易にはがすことができる。
In the present invention, after the resin coating is formed, a lens processing double-sided tape is stuck on the resin coating, and the lens is cut.
The double-sided tape for lens processing is not particularly limited and may be a known one. For example, trade name: Reap tape (manufactured by Sumitomo 3M Co., Ltd.), trade name: blocking pad (manufactured by Simon Co., Ltd.), etc. are known. It has been.
In addition, the processing machine for cutting the lens is not particularly limited, and a known machine may be used, and a machine used in a spectacle retailer or a machine used by a processor can be used.
In the case of a spectacle lens after cutting, if the resin coating is not required, it can be easily removed by pinching the end of the resin coating with a finger.
以下、本発明を実施例を用いてより具体的に説明するが、本発明はこれらの実施例に限定されるものではない。
実施例1
(1)反射防止膜付プラスチックレンズの作製
プラスチックレンズとして、ジエチレングリコールビスアリルカーボネート重合体系レンズ(HOYA(株)製Hi−Lux(商品名)、屈折率1.499、度数0.00)を用い、このプラスチックレンズ基材上に、特開昭63−10640号公報に開示されている硬化膜を施した。具体的には、SiO2濃度40%のコロイダルシリカ(スノーテックス−40、水分散シリカ、日産化学(株)製)240質量部に、0.5N塩酸2.0質量部、酢酸20質量部を加えた溶液を、35℃にして攪拌しながら、γ−グリシドキシプロピルトリメトキシシラン(3官能有機ケイ素化合物)95質量部を滴下し、室温にて8時間攪拌し、室温にて16時間放置した。この加水分解溶液に、メチルセロソルブ80質量部、イソプロピルアルコール120質量部、ブチルアルコール40質量部、アルミニウムアセチルアセトン16質量部、シリコーン系界面活性剤(NUCシルウェットY−7006(商品名)、日本ウニカ(株)製)0.2質量部、紫外線吸収剤(チヌビンP(商品名)、チバガイギー製)0.1質量部を加えて、8時間攪拌後、室温にて24時間熟成させコーティング組成物を得た。該組成物を、引き上げ速度15cm/minで浸漬法により塗布、室温にて15分放置後、120℃で2時間加熱硬化して硬化膜を施した。
次に、前記硬化膜上に真空蒸着法(真空度2.67×10-3Pa(2×10-5Torr) )により、二酸化ケイ素からなる下地層(屈折率1.46、膜厚0.5λ(λは550nm))を形成し、該下地層の上に、プラスチックレンズに酸素イオンビームを照射するイオンビームアシスト法で得られる二酸化チタンからなる層(膜厚0.06λ)、真空蒸着法で得られる二酸化ケイ素からなる層(膜厚0.12λ)、さらにイオンビームアシスト法で得られる二酸化チタンからなる層(膜厚0.06λ)よりなる3層等価膜である第1層(屈折率1.70、膜厚0.24λ)を形成した。この第1層の上に、イオンビームアシスト法により二酸化チタンからなる第2層(屈折率2.40、膜厚0.5λ)を形成し、該第2層の上に、真空蒸着法(真空度2.67×10-3Pa(2×10-5Torr) )により二酸化ケイ素からなる第3層(屈折率1.46、膜厚0.25λ)を形成して、反射防止膜付きプラスチックレンズを得た。このレンズは直径75mmの円形で、視感反射率は0.4%であった。
EXAMPLES Hereinafter, although this invention is demonstrated more concretely using an Example, this invention is not limited to these Examples.
Example 1
(1) Production of plastic lens with antireflection film As a plastic lens, a diethylene glycol bisallyl carbonate polymer lens (Hi-Lux (trade name) manufactured by HOYA Co., Ltd., refractive index 1.499, power 0.00) is used. A cured film disclosed in Japanese Patent Application Laid-Open No. 63-10640 was applied on this plastic lens substrate. Specifically, 240 parts by mass of colloidal silica having a SiO 2 concentration of 40% (Snowtex-40, water-dispersed silica, manufactured by Nissan Chemical Co., Ltd.) is added with 2.0 parts by mass of 0.5N hydrochloric acid and 20 parts by mass of acetic acid. While stirring the added solution at 35 ° C., 95 parts by mass of γ-glycidoxypropyltrimethoxysilane (trifunctional organosilicon compound) was added dropwise, stirred at room temperature for 8 hours, and allowed to stand at room temperature for 16 hours. did. To this hydrolyzed solution, 80 parts by mass of methyl cellosolve, 120 parts by mass of isopropyl alcohol, 40 parts by mass of butyl alcohol, 16 parts by mass of aluminum acetylacetone, silicone surfactant (NUC Silwet Y-7006 (trade name), Nippon Unica ( Co., Ltd.) 0.2 parts by mass, UV absorber (Tinubin P (trade name), Ciba Geigy) 0.1 part by mass was added, stirred for 8 hours, and then aged at room temperature for 24 hours to obtain a coating composition. It was. The composition was applied by a dipping method at a lifting speed of 15 cm / min, allowed to stand at room temperature for 15 minutes, and then cured by heating at 120 ° C. for 2 hours to give a cured film.
Next, an underlying layer (refractive index: 1.46, film thickness: 0.16) made of silicon dioxide is formed on the cured film by a vacuum deposition method (vacuum degree: 2.67 × 10 −3 Pa (2 × 10 −5 Torr)). 5λ (λ is 550 nm)), and a layer made of titanium dioxide (thickness 0.06λ) obtained by an ion beam assist method for irradiating a plastic lens with an oxygen ion beam on the underlying layer, a vacuum deposition method The first layer (refractive index) which is a three-layer equivalent film composed of a layer made of silicon dioxide (thickness 0.12λ) obtained in step 1 and a layer made of titanium dioxide (thickness 0.06λ) obtained by the ion beam assist method. 1.70, film thickness 0.24λ). A second layer made of titanium dioxide (refractive index 2.40, film thickness 0.5λ) is formed on the first layer by an ion beam assist method, and a vacuum deposition method (vacuum) is formed on the second layer. A third layer (refractive index: 1.46, film thickness: 0.25λ) made of silicon dioxide is formed at a degree of 2.67 × 10 −3 Pa (2 × 10 −5 Torr)) to provide a plastic lens with an antireflection film Got. This lens was circular with a diameter of 75 mm, and the luminous reflectance was 0.4%.
(2)撥水性薄膜の形成
前記(1)で得られたプラスチックレンズの凹凸両面に、撥水処理剤として下記化合物(A)及び溶媒としてメタキシレンヘキサフロライド(C6H4(CF3)2)を用いて、下記のようにしてフッ素防汚コーティングが施されたレンズを作製した。
(CH3O)3SiCH2CH2CH2OCH2CF2(OC2F4)p(OCF2)qOCF2CH2OCH2CH2CH2Si(OCH3)3 ・・・(A)
(式中、p=22、q=22、繰り返し単位(OC2F4)及び(OCF2)の配列はランダムであり、化合物(A)は3次元構造の硬化物である。)
化合物(A)を0.30mlしみ込ませたステンレス製焼結フィルター(細孔径80〜100μm、直径18mmφ、厚さ3mm)を真空蒸着装置内にセットし、以下(I)、(II)の条件で電子銃を用いて該焼結フィルター全体を加熱して、前記反射防止膜付プラスチックレンズに撥水性薄膜を形成した。このレンズの度数は−7.00D、視感反射率は0.4%であった。
(I)真空度:3.1×10-4 〜8.0×10-4Pa(2.3×10-6〜6.0×10-6Torr)
(II)電子銃の条件
加速電圧:6kV、印加電流:15mA、照射面積:3.5×3.5cm2、蒸着時間:30秒
(2) Formation of water-repellent thin film On the concavo-convex surfaces of the plastic lens obtained in (1) above, the following compound (A) as a water-repellent treatment agent and metaxylene hexafluoride (C 6 H 4 (CF 3 ) as a solvent Using 2 ), a lens with a fluorine antifouling coating was prepared as follows.
(CH 3 O) 3 SiCH 2 CH 2 CH 2 OCH 2 CF 2 (OC 2 F 4 ) p (OCF 2 ) q OCF 2 CH 2 OCH 2 CH 2 CH 2 Si (OCH 3 ) 3 (A)
(In the formula, p = 22, q = 22, the arrangement of the repeating units (OC 2 F 4 ) and (OCF 2 ) is random, and the compound (A) is a cured product having a three-dimensional structure.)
A stainless sintered filter (pore diameter 80-100 μm, diameter 18 mmφ, thickness 3 mm) impregnated with 0.30 ml of compound (A) was set in a vacuum deposition apparatus, and under the conditions (I) and (II) below. The entire sintered filter was heated using an electron gun to form a water repellent thin film on the plastic lens with the antireflection film. The power of this lens was −7.00 D, and the luminous reflectance was 0.4%.
(I) Degree of vacuum: 3.1 × 10 −4 to 8.0 × 10 −4 Pa (2.3 × 10 −6 to 6.0 × 10 −6 Torr)
(II) Electron gun conditions Acceleration voltage: 6 kV, applied current: 15 mA, irradiation area: 3.5 × 3.5 cm 2 , deposition time: 30 seconds
(3)樹脂製被膜の形成
被膜形成剤として、固形分濃度20質量%となるように、溶質として重量平均分子量6〜8万の塩素化ポリプロピレン、溶媒としてトルエン及びシクロヘキサンを含有する被膜形成剤(商品名:スーパークロン 日本製紙ケミカル(株)製)を使用して(2)で得られたプラスチックレンズを、常温で浸漬塗布法により下降速度を300mm/min、上昇速度を300mm/minとして被膜形成剤を全面に塗布し、15分間常温乾燥させてプラスチックレンズに樹脂製被膜を形成した。
(4)プラスチックレンズの評価
上記(1)〜(3)の操作を繰り返し、プラスチックレンズのサンプルを10枚作製し下記(i)及び(ii)の評価を行った。
(i)度数変化の測定
樹脂製被膜形成前と形成後のプラスチックレンズのサンプルについてレンズメーターにて度数の測定を行った結果を表1に示す。
(ii)軸ずれの測定
レンズの光学中心を通るよう、横方向(X軸)及び縦方向(Y軸)に2本の線を直交するように設ける。レンズの光学中心にレンズ加工用両面テープ(商品名:リープテープ(住友3M(株)製)の基準点が来るように、前記テープを貼り付ける。その後、HOYA(株)製の玉摺り加工機(商品名:AE−3000)を用いてレンズの玉型加工を行い、レンズ加工前と加工後のレンズ加工用両面テープの基準点間の直線間距離及び角度を測定し、それぞれ中心ずれ距離(A(mm))、軸ずれ角(θ(°))とした(図1参照)。図1において、点線が加工前の直行座標、実線が加工後の直行座標を示す。得られた結果を表2に示す。
なお、表2中、中心ずれ距離Aが0.5mm以上を×、0.5mm未満を○として記載した。
(3) Formation of resin-made film As a film-forming agent, a film-forming agent containing chlorinated polypropylene having a weight average molecular weight of 60 to 80,000 as a solute and toluene and cyclohexane as a solvent so as to have a solid content concentration of 20% by mass ( (Product name: Super Clone, manufactured by Nippon Paper Chemicals Co., Ltd.) The plastic lens obtained in (2) is formed at a normal temperature by a dip coating method with a descending speed of 300 mm / min and an ascending speed of 300 mm / min. The agent was applied to the entire surface and dried at room temperature for 15 minutes to form a resin film on the plastic lens.
(4) Evaluation of plastic lens The above operations (1) to (3) were repeated to produce 10 plastic lens samples, and the following evaluations (i) and (ii) were performed.
(I) Measurement of power change Table 1 shows the results of power measurement with a lens meter for plastic lens samples before and after the formation of the resin film.
(Ii) Measurement of axial deviation Two lines are provided so as to be orthogonal to the horizontal direction (X axis) and the vertical direction (Y axis) so as to pass through the optical center of the lens. Affix the tape so that the reference point of the double-sided tape for lens processing (trade name: Leap Tape (manufactured by Sumitomo 3M Co., Ltd.) comes to the optical center of the lens. (Product name: AE-3000) is used to process the lens, and the distance between the straight lines and the angle between the reference points of the lens processing double-sided tape before and after lens processing are measured. A (mm)) and an axis deviation angle (θ (°)) (see Fig. 1), where the dotted line indicates the orthogonal coordinates before processing and the solid line indicates the orthogonal coordinates after processing. It shows in Table 2.
In Table 2, the center deviation distance A is described as x when the distance is 0.5 mm or more, and ◯ when less than 0.5 mm.
比較例1
実施例1において、樹脂製被膜の代わりに眼鏡用レンズの両面にポリエステル製フィルム(商品名:AT−22 ビッグテクノス(株)製)を貼り付け、その上の凸面に両面加工用テープ(リープテープ(住友3M(株)製))を貼り付けた以外は同様にして、プラスチックレンズのサンプルを10枚作製し(4)の(i)及び(ii)の評価を行った。それらの結果を表1及び2に示す。
ただし、比較例1においては、(4)の(i)の測定は、樹脂製被膜形成前と形成後のプラスチックレンズのサンプルの代わりに、ポリエステル製フィルムの貼り付け前と貼り付け後のサンプルについてレンズメーターにて度数の測定を行った。
Comparative Example 1
In Example 1, instead of a resin coating, a polyester film (trade name: manufactured by AT-22 Big Technos Co., Ltd.) is pasted on both sides of a spectacle lens, and a double-sided processing tape (leap tape) is formed on the convex surface thereon. 10 plastic lens samples were prepared in the same manner except that (Sumitomo 3M Co., Ltd.)) was attached, and (i) and (ii) of (4) were evaluated. The results are shown in Tables 1 and 2.
However, in Comparative Example 1, the measurement of (4) (i) was performed on samples before and after the polyester film was attached, instead of the plastic lens samples before and after the resin film formation. The frequency was measured with a lens meter.
比較例2
実施例1において、樹脂製被膜を形成せず、眼鏡用レンズの凸面に両面加工用テープ(リープテープ(住友3M(株)製))のみを貼り付けた以外は同様にして、プラスチックレンズのサンプルを10枚作製し(4)の(ii)の評価を行った結果を表2に示す。
Comparative Example 2
In Example 1, a plastic lens sample was formed in the same manner except that the resin coating was not formed and only the double-sided processing tape (leaving tape (manufactured by Sumitomo 3M)) was applied to the convex surface of the spectacle lens. Table 2 shows the results of the evaluation of (4) and (ii).
表1の結果より、実施例1のプラスチックレンズでは樹脂製被膜形成の前後で度数表示差が大きくずれるものは無かった。これに対し、比較例1のプラスチックレンズではポリエステル製フィルムの貼り付け前後で度数表示差が大きく、度数の誤表示となるものがあるため、フィルムやテープ貼り付け後に正確な度数測定を行うことはできない。なお、通常は、フィルムやテープを張る位置を決めるためにレンズメーターを使用するため、何の印も無い状態で正確な位置にフィルムやテープを張ることは不可能である。
以上の結果より、実施例1のように樹脂製被膜を形成することにより、正確な度数測定が行えることが確認された。
From the results of Table 1, in the plastic lens of Example 1, there was no significant difference in the frequency display before and after the resin coating was formed. On the other hand, the plastic lens of Comparative Example 1 has a large frequency display difference before and after the polyester film is pasted, resulting in erroneous display of the power. Can not. Normally, since a lens meter is used to determine the position where the film or tape is stretched, it is impossible to stretch the film or tape at an accurate position without any mark.
From the above results, it was confirmed that an accurate frequency measurement can be performed by forming a resin film as in Example 1.
表2の結果より、実施例1のプラスチックレンズでは、10枚すべてについて中心ずれ及び軸ずれが発生しなかった。一方、比較例1では中心ずれはないが、軸ずれが起きたものがあった。比較例2では、全てのレンズで中心ずれ、軸ずれがおきた。また、実施例1のプラスチックレンズは玉型加工後の撥水性が劣化することなく維持されていた。
また、玉型加工終了後、実施例1のプラスチックレンズの樹脂製被膜の端を指でつまんで剥がすと、加工後のレンズはレンズ表面に汚れの無いきれいな状態となり、その後も洗浄を必要としないため、取り扱い傷を減らすことが可能となった。
From the results shown in Table 2, in the plastic lens of Example 1, the center deviation and the axis deviation did not occur for all 10 lenses. On the other hand, in Comparative Example 1, there was no center shift, but there was a shaft misalignment. In Comparative Example 2, the center deviation and the axis deviation occurred in all the lenses. In addition, the plastic lens of Example 1 was maintained without deterioration of water repellency after processing the target lens shape.
Further, after the lens processing is completed, if the end of the resin coating of the plastic lens of Example 1 is pinched with a finger and removed, the processed lens becomes clean with no dirt on the lens surface, and does not require cleaning thereafter. Therefore, handling scratches can be reduced.
実施例2
実施例1において、被膜形成剤に、シリコーン系界面活性剤(Y−7006(商品名)、(東レ・ダウコーニング社製))を0.1質量%添加した以外は全て同様にしてプラスチックレンズに樹脂製被膜を形成し、実施例1の(4)と同様にプラスチックレンズを評価したところ実施例1と同様の結果が得られた。
比較例3
実施例1において、実施例1で用いた被膜形成剤の代わりに、合成樹脂として変性酢酸ビニル樹脂を25〜35質量%、溶剤としてメタノールを65〜75質量%含有する被膜形成剤(Three Bond 1401(商品名)、(株)スリーボンド製)を用いた以外は同様にしてプラスチックレンズに樹脂製被膜を形成したところ、レンズ表面に凹凸ができてしまい、実施例1の(4)の(1)と同様にプラスチックレンズの度数測定を行なった結果、レンズメータにおける度数表示値が誤数値となった。
Example 2
In Example 1, the same applies to the plastic lens except that 0.1% by mass of a silicone surfactant (Y-7006 (trade name), manufactured by Toray Dow Corning) was added to the film forming agent. When a resin film was formed and the plastic lens was evaluated in the same manner as in Example 4 (4), the same result as in Example 1 was obtained.
Comparative Example 3
In Example 1, instead of the film forming agent used in Example 1, a film forming agent (Three Bond 1401) containing 25 to 35% by mass of a modified vinyl acetate resin as a synthetic resin and 65 to 75% by mass of methanol as a solvent. When a resin film was formed on a plastic lens in the same manner except that (trade name), manufactured by ThreeBond Co., Ltd. was used, irregularities were formed on the lens surface, and (1) in Example 4 (4) As a result of measuring the power of the plastic lens in the same manner as described above, the power display value in the lens meter was an incorrect value.
本発明の眼鏡レンズの切削方法によれば、撥水性を有する眼鏡レンズを玉型加工等の切削加工する際に、軸ずれを引き起こすことがなく正確な加工ができる。このため、実用的な眼鏡レンズの切削方法として有用である。 According to the spectacle lens cutting method of the present invention, when a spectacle lens having water repellency is cut, such as a lens shape, accurate processing can be performed without causing an axis shift. Therefore, it is useful as a practical eyeglass lens cutting method.
Claims (10)
The spectacle lens according to claim 8 or 9, wherein the lens has an antireflection film.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008152085A (en) * | 2006-12-19 | 2008-07-03 | Hoya Corp | Method for manufacturing spectacle lens, film deposition apparatus for spectacle lens, and spectacle lens |
WO2008114781A1 (en) * | 2007-03-16 | 2008-09-25 | Hoya Corporation | Method for edging lens of glasses |
JP2013050652A (en) * | 2011-08-31 | 2013-03-14 | Nikon-Essilor Co Ltd | Lens for eyeglasses |
KR20170013863A (en) | 2014-05-30 | 2017-02-07 | 도카이 옵티컬 컴퍼니 리미티드 | Displacement prevention coating agent |
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JP2013254161A (en) * | 2012-06-08 | 2013-12-19 | Nikon-Essilor Co Ltd | Spectacle lens and method of processing the same |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008152085A (en) * | 2006-12-19 | 2008-07-03 | Hoya Corp | Method for manufacturing spectacle lens, film deposition apparatus for spectacle lens, and spectacle lens |
WO2008114781A1 (en) * | 2007-03-16 | 2008-09-25 | Hoya Corporation | Method for edging lens of glasses |
JPWO2008114781A1 (en) * | 2007-03-16 | 2010-07-08 | Hoya株式会社 | Edge-grinding method for eyeglass lenses |
US8216024B2 (en) | 2007-03-16 | 2012-07-10 | Hoya Corporation | Spectacle lens edging method |
JP4988823B2 (en) * | 2007-03-16 | 2012-08-01 | Hoya株式会社 | Edge-grinding method for eyeglass lenses |
JP2013050652A (en) * | 2011-08-31 | 2013-03-14 | Nikon-Essilor Co Ltd | Lens for eyeglasses |
KR20170013863A (en) | 2014-05-30 | 2017-02-07 | 도카이 옵티컬 컴퍼니 리미티드 | Displacement prevention coating agent |
CN106573356A (en) * | 2014-05-30 | 2017-04-19 | 东海光学株式会社 | Deviation-preventing coating material |
US9963612B2 (en) | 2014-05-30 | 2018-05-08 | Tokai Optical Co., Ltd. | Displacement prevention coating agent |
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