JP5740607B2 - Durability test method for optical products - Google Patents
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本発明は、眼鏡レンズ等の光学製品についてその耐久性を試験する方法、ないしその方法を実行可能な装置に関する。 The present invention relates to a method for testing durability of an optical product such as a spectacle lens, and an apparatus capable of executing the method.
光学製品の一例である眼鏡プラスチックレンズについて、傷付き難さを評価する方法として、下記特許文献１に記載のものが知られている。この方法では、レンズに擦傷物を押付ける方向に荷重をかけた状態でこれらを相対運動させ、その後のレンズの表面状態によってレンズの耐擦傷性能を評価する。 As a method for evaluating the scratch resistance of a spectacle plastic lens which is an example of an optical product, the one described in Patent Document 1 below is known. In this method, the lens is relatively moved in a state where a load is applied in the direction in which the scratch is pressed against the lens, and the scratch resistance performance of the lens is evaluated according to the surface condition of the lens thereafter.
近時、眼鏡プラスチックレンズに対し、様々な機能を付与するため、各種のコーティングを付与することが行われている。例えば、傷を付き難くするハードコートや耐衝撃性コート、あるいは光の反射を抑えて透過率を高める反射防止膜、水や油を弾き水ヤケや汚れを防止する撥水・撥油コート等のコーティングが施される。 Recently, various coatings have been applied to spectacle plastic lenses in order to provide various functions. For example, hard coats and impact-resistant coatings that make scratches difficult to wear, anti-reflection coatings that suppress light reflection and increase transmittance, water- and oil-repellent coatings that repel water and oil and prevent water burns and dirt Coating is applied.
このようなレンズが長期間実際に使用されると、傷の他にコーティングの剥離が生じることがあるが、上述の評価方法では、傷付き難さに関する評価しか行うことができない。又、昨今の撥水・撥油コート、あるいはハードコートや反射防止膜の改良による傷付き難さの向上により、上記の評価方法では、ある程度までの荷重では傷が入り難くなっていると共に、所定の荷重を超えると急に大きな傷が付くようになっており、耐擦傷性能の評価もし難くなってしまっている。 When such a lens is actually used for a long period of time, the coating may be peeled in addition to the scratch, but the above-described evaluation method can only evaluate the difficulty of scratching. In addition, due to the improvement in scratch resistance due to recent improvements in water and oil repellent coatings, hard coats and antireflection coatings, the above evaluation method makes it difficult for scratches to enter under a certain load. Exceeding the load, suddenly large scratches are attached, making it difficult to evaluate scratch resistance.
そこで、請求項１に記載の発明は、コーティングされた光学製品であっても、実際の使用に即した状態で、耐擦傷性能を含む耐久性について適切且つ簡易に評価をすることが可能となる試験方法を提供することを目的としたものである。 Therefore, the invention described in claim 1 makes it possible to appropriately and easily evaluate the durability including the scratch resistance in a state in accordance with the actual use even for the coated optical product. The purpose is to provide a test method .
上記目的を達成するために、請求項１に記載の発明は、光学製品の耐久性試験方法にあって、光学製品に擦傷部を所定の荷重がかかる状態で押し付け、光学製品と擦傷部を相対運動させる耐擦傷性試験工程と、当該耐擦傷性試験工程後の前記光学製品を、所定時間人工汗に浸漬させる人工汗試験工程と、前記人工汗試験工程後の前記光学製品を、水・紫外線の内の少なくとも１つが室内環境に比べて多い環境下に特定時間定置する耐候促進試験工程を有しており、前記耐擦傷性試験工程、前記人工汗試験工程、及び前記耐候促進試験工程は、それぞれ１回のみ行われることを特徴とするものである。 In order to achieve the above object, the invention described in claim 1 is an optical product durability test method, wherein the optical product is pressed against the scratched portion in a state where a predetermined load is applied, and the optical product and the scratched portion are relative to each other. Scratch resistance test step for moving, artificial sweat test step for immersing the optical product after the scratch resistance test step in artificial sweat for a predetermined time, and optical product after the artificial sweat test step for water / ultraviolet light At least one of but are have a weather accelerated test step to position a specific time in an environment larger than the indoor environment, the abrasion resistance test step, the artificial sweat test process, and the weathering accelerated test process, It performed only once respectively characterized in Rukoto.
請求項２に記載の発明は、上記目的に加えて、更に適切な評価が可能となる手間のかからない試験を行う目的を達成するため、上記発明にあって、前記人工汗試験工程における所定時間が２４時間以上であり、且つ、前記耐候促進試験工程における特定時間が２４時間以上であることを特徴とするものである。 In order to achieve the purpose of performing the labor-saving test that enables more appropriate evaluation in addition to the above object, the invention described in claim 2 is the above invention, wherein the predetermined time in the artificial sweat test step is It is 24 hours or more, and the specific time in the weathering acceleration test step is 24 hours or more.
本発明によれば、光学製品に擦傷部を所定の荷重がかかる状態で押し付け、光学製品と擦傷部を相対運動させる耐擦傷性試験をした後、当該耐擦傷性試験工程後の前記光学製品を、所定時間人工汗に浸漬させる人工汗試験をし、更に当該人工汗試験工程後の前記光学製品を、水・紫外線の内の少なくとも１つが室内環境に比べて多い環境下に特定時間定置する耐候促進試験工程を、それぞれ１回のみ行う。従って、実際の使用に即した状態における耐久性の適切な評価を可能とする、手間の少ない試験を提供することができる。 According to the present invention, after the scratch part is pressed against the optical product in a state where a predetermined load is applied and the optical product and the scratch part are relatively moved, the optical product after the scratch resistance test step is performed. A weather resistance test in which the artificial sweat test is immersed in artificial sweat for a predetermined time, and the optical product after the artificial sweat test process is placed in an environment where at least one of water and ultraviolet rays is larger than the indoor environment for a specific time. Each accelerated test step is performed only once . Therefore, it is possible to provide a test with less labor that enables appropriate evaluation of durability in a state in accordance with actual use.
以下、本発明に係る実施の形態につき説明する。なお、本発明の形態は、以下のものに限定されない。 Hereinafter, embodiments according to the present invention will be described. In addition, the form of this invention is not limited to the following.
本発明においては、光学製品に対し、順に、耐擦傷性試験工程、人工汗試験工程を施し、好適には、更に耐候促進試験工程を施す。光学製品として、好適にはコーティング付きのものが対象となり、例えばコーティング付き光学レンズが対象となる。 In the present invention, the optical product is sequentially subjected to a scratch resistance test step and an artificial sweat test step, and more preferably a weather resistance acceleration test step. The optical product is preferably a coated one, for example, a coated optical lens.
耐擦傷性試験工程は、擦傷部を光学製品（におけるコーティング付与部）に所定の荷重がかかる状態で押し付け、擦傷部と光学製品を相対運動させて行う。擦傷部の例として、スチールウール等の損傷体それ自体、あるいは損傷体を台に固定したものを挙げることができる。又、相対運動は、好適には、固定した光学製品に対する擦傷部の（所定回数に亘る）往復運動であるが、光学製品を往復運動させるものでも良いし、双方を往復運動させるものでも良いし、光学製品表面の鉛直線を軸とする回転運動でも良いし、一方を往復運動させ他方を回転運動させるものでも良い。又、相対運動の速度は、適宜設定され、好適には統一される。耐擦傷性試験工程により、光学製品（におけるコーティング）に傷が付く。 The scratch resistance test step is performed by pressing the scratched part against the optical product (coating application part) in a state where a predetermined load is applied, and moving the scratched part and the optical product relative to each other. Examples of the scratched part include a damaged body such as steel wool itself, or a damaged body fixed to a table. The relative motion is preferably the reciprocating motion (for a predetermined number of times) of the scratched part with respect to the fixed optical product, but the optical product may be reciprocated or both may be reciprocated. Rotational motion about the vertical line on the surface of the optical product may be used, or one may be reciprocated and the other rotationally moved. The speed of relative motion is set as appropriate and preferably unified. Due to the scratch resistance test process, the optical product (the coating) is scratched.
人工汗試験工程は、耐擦傷性試験工程後の光学製品を人工汗に浸漬させて行う。人工汗は、汗を模した液体で、好適にはアルカリ人工汗であり、更に好適には「ＪＩＳ Ｌ−０８４８ Ｂ」に基づき調製された人工汗である。浸漬期間は、所定の期間とすることができ、試験結果の顕在化と試験に要する時間との兼ね合いから、好適には１〜３日間、更に好適には１日間とされるが、１２時間や４日間、１週間等の他の期間とされても良い。人工汗試験工程により、光学製品（におけるコーティング）の傷を含む表面に人工汗が作用する。 In the artificial sweat test step, the optical product after the scratch resistance test step is immersed in artificial sweat. The artificial sweat is a liquid simulating sweat, preferably alkaline artificial sweat, and more preferably artificial sweat prepared based on “JIS L-0848 B”. The immersion period can be a predetermined period, and is preferably 1 to 3 days, more preferably 1 day from the balance between the actualization of the test results and the time required for the test. Other periods such as four days or one week may be used. The artificial sweat test process causes the artificial sweat to act on the surface containing the scratches on the optical product (in the coating).
耐候促進試験工程は、人工汗試験工程後の光学製品を所定の環境下に定置して行う。所定の環境は、水・熱・紫外線の内の少なくとも１つに対する耐性を確認するために設定され、好適には、室内環境に比べ高湿度・高温であり又多量の紫外線が照射される環境（常温より高温・快適な湿度より高湿・平均的な量より多量の紫外線）とされる。このような環境は、好適には耐候促進試験機としてのサンシャインウェザーメーターにて形成され、光学製品をサンシャインウェザーメーターに投入することで当該環境下に晒される。 The weather resistance acceleration test step is performed by placing the optical product after the artificial sweat test step in a predetermined environment. The predetermined environment is set in order to confirm the resistance to at least one of water, heat, and ultraviolet rays, and is preferably an environment that is higher in humidity and temperature than the indoor environment and is irradiated with a large amount of ultraviolet rays ( Higher than normal temperature, higher humidity than comfortable humidity, more UV light than average amount). Such an environment is preferably formed by a sunshine weather meter as a weather resistance acceleration tester, and is exposed to the environment by introducing an optical product into the sunshine weather meter.
≪実施例１〜４≫
本発明における光学製品の一例としての眼鏡用プラスチックレンズ（計４種類）に対し、耐擦傷性試験工程の後、人工汗試験工程を施した。
<< Examples 1 to 4 >>
An artificial sweat test step was performed after a scratch resistance test step on plastic glasses for spectacles (a total of four types) as an example of an optical product in the present invention.
レンズは、何れもフラットレンズ基材の表面にコーティングを施した直径７．５ｃｍ（センチメートル）のものであり、実施例１，２において基材の屈折率は１．７であり、実施例３，４において基材の屈折率は１．７６である。又、実施例１，３においてコーティングは東海光学株式会社製スーパーパワーシールドコートであり、実施例２，４においてコーティングは同社製マックスシールドコートである。 Each of the lenses has a diameter of 7.5 cm (centimeter) obtained by coating the surface of a flat lens substrate. In Examples 1 and 2, the refractive index of the substrate is 1.7. , 4, the refractive index of the base material is 1.76. In Examples 1 and 3, the coating is a super power shield coat manufactured by Tokai Optical Co., Ltd., and in Examples 2 and 4, the coating is a Max shield coat manufactured by the same company.
又、耐擦傷性試験工程は、次の要領で行った。即ち、長さ５ｃｍ・幅１ｃｍの大きさとしたスチールウール（日本スチールウール株式会社製ボンスターＮｏ．０００）を擦傷部とし、耐擦傷性試験機のアームの先端部に固定する。耐擦傷性試験機は、アームと、その基端側を受け入れて、基端側を駆動することで少なくとも先端側を揺動させる本体と、当該アームの先端部に荷重をかけるための荷重付加部を有する。荷重付加部は、ここでは当該アームの先端部上側に設けられた重り載置部、及び５００ｇ（グラム）の重りであり、重り載置部に重りを載せることで、５００ｇの荷重がアームの先端部に固定された擦傷部にかかる。そして、擦傷部を、１秒間に１往復（片道４．５ｃｍ）の速度において、各レンズのコーティング付きの表面上でレンズ中央を通る状態で５０往復させ、各レンズの表面に擦り付けることで、当該表面に擦傷を付ける。 The scratch resistance test process was performed as follows. That is, steel wool (Bonstar No. 000 manufactured by Nippon Steel Wool Co., Ltd.) having a length of 5 cm and a width of 1 cm is used as a scratched portion and fixed to the tip of the arm of the scratch resistance tester. The scratch resistance tester includes an arm, a main body that receives the base end side of the arm and drives the base end side to swing at least the tip end side, and a load applying unit for applying a load to the tip end portion of the arm. Have Here, the load applying portion is a weight placing portion provided above the tip end portion of the arm and a weight of 500 g (gram), and by placing the weight on the weight placing portion, a load of 500 g is applied to the tip end of the arm. It is applied to the scratched part fixed to the part. Then, the scratch part is reciprocated 50 times in a state of passing through the center of the lens on the coated surface of each lens at a speed of one reciprocation (one-way 4.5 cm) per second, and rubbed against the surface of each lens. Scratch the surface.
更に、人工汗試験工程は、次の要領で行った。即ち、塩化ナトリウム１０ｇ、リン酸水素ナトリウム１２水和水２．５ｇ、及び炭酸アンモニウム４．０ｇに１リットルの純水を加えてできる水溶液をアルカリ人工汗とし、具体的には前三者をビーカー（槽）に量り入れ、更に後者を入れて攪拌する。そして、耐擦傷試験工程を経た各レンズをアルカリ人工汗に浸漬し、１日間あるいは３日間室温（２５℃）で静置する。なお、擦傷部付きの耐擦傷性試験機と人工汗槽（と前者から後者へレンズを渡す移送装置）により、レンズの耐久性試験装置を構成することができる。 Furthermore, the artificial sweat test process was performed as follows. That is, an aqueous solution obtained by adding 1 liter of pure water to 10 g of sodium chloride, 2.5 g of sodium hydrogenphosphate 12-hydrated water, and 4.0 g of ammonium carbonate was used as alkaline artificial sweat. Weigh in (tank) and add the latter and stir. Then, each lens that has undergone the scratch resistance test step is immersed in alkaline artificial sweat and allowed to stand at room temperature (25 ° C.) for 1 day or 3 days. In addition, the durability test apparatus of a lens can be comprised with the abrasion-resistance test machine with an abrasion part and an artificial sweat tank (and the transfer apparatus which passes a lens from the former to the latter).
［表１］に、実施例１〜４に係る各試験工程の結果を示す。 [Table 1] shows the results of the test steps according to Examples 1 to 4.
［表１］中の「外観」は、蛍光灯を透過させた状態で目視により確認した、レンズ表面における傷の本数あるいは擦傷の状態を示す。又、「Ｈａｚｅ」は、レンズ表面の擦傷の濁り度合を調べるためにヘイズメーターにより測定したヘイズ値を示すものであり、ヘイズ値が高いほど濁りが強い。「１」〜「３」に分かれているが、測定点の違いによるものであり、「２」がレンズ表面の擦傷の中央（レンズ中央）を測定点としたものであり、「１」が「２」より５ｍｍ（ミリメートル）離れた点を測定点としたものであり、「３」が「１」と逆側において「２」より５ｍｍ（ミリメートル）離れた点を測定点としたものである。又、「平均」は、「１」〜「３」のヘイズ値の平均値を示し、「ΔＨａｚｅ」は、初期状態における「平均」からの増分値を示す。 “Appearance” in [Table 1] indicates the number of scratches on the lens surface or the state of scratches visually confirmed in a state where the fluorescent lamp is transmitted. “Haze” indicates a haze value measured by a haze meter in order to examine the degree of turbidity of the scratches on the lens surface. The higher the haze value, the stronger the turbidity. Although it is divided into “1” to “3”, it is due to the difference in measurement point, “2” is the center of the scratch on the lens surface (center of the lens), and “1” is “ The point 5 mm (millimeters) away from “2” is the measurement point, and “3” is the point opposite to “1” and 5 mm (millimeters) away from “2”. “Average” indicates an average value of haze values “1” to “3”, and “ΔHaze” indicates an increment value from “average” in the initial state.
［表１］によれば、実施例１〜４の各レンズとも、耐擦傷性試験工程のみでは殆ど傷が見受けられず、ヘイズ値も初期と殆ど変わらないが、更に人工汗試験工程を経ると、実施例１，３において擦傷が目視できるほど白濁化してヘイズ値も顕著に増加する一方、実施例２，４において擦傷が目視できずヘイズ値も比較的に増分が小さい状態となっている。 According to [Table 1], in each of the lenses of Examples 1 to 4, scars are hardly seen only in the scratch resistance test process, and the haze value is hardly changed from the initial stage. In Examples 1 and 3, the haze value increases remarkably as the scratches are visible, while the haze value increases remarkably in Examples 2 and 4, while the haze value is relatively small.
従って、耐擦傷性試験では差が見受けられない状態であっても、更に人工汗試験工程を加えることで差を顕著化することができ、光学製品としての眼鏡プラスチックレンズの耐久性、殊にレンズのコーティングの耐久性につき、実施例１，３より実施例２，４の方が優れるというように評価することが可能となる。 Therefore, even if the difference is not found in the scratch resistance test, the difference can be made remarkable by adding an artificial sweat test process, and the durability of the spectacle plastic lens as an optical product, in particular, the lens It is possible to evaluate that the durability of the coating of Example 2 is superior to that of Examples 1 and 3.
このように差が顕在化することについて、次のように考えることができる。即ち、実使用において、光学製品の表面に傷が付き、その傷から水分や汗が浸入して時間が経過することにより劣化する。特に、光学製品の表面にコーティングが施されている場合には、傷によりコーティングが物理的に損傷し、そこから水分や汗が浸入して、コーティングや光学製品の基材、あるいはこれらの間が浸食される。そして、耐擦傷性試験工程後に人工汗試験工程を行うことにより、このような浸食が再現され、浸食に弱いものは擦傷の白濁化により顕在化して、適切な評価を下すことが可能となる。 The fact that the difference becomes obvious can be considered as follows. That is, in actual use, the surface of the optical product is scratched, and moisture and sweat permeate from the scratch and deteriorate with time. In particular, when a coating is applied to the surface of an optical product, the coating is physically damaged due to scratches, and moisture and sweat permeate from the coating. Eroded. Then, by performing the artificial sweat test step after the scratch resistance test step, such erosion is reproduced, and those that are vulnerable to erosion become obvious due to the clouding of the scratch and can be appropriately evaluated.
≪実施例５〜９≫
実施例１〜４でコーティングの耐久性が比較的に弱いものとされた、同一種類の眼鏡用プラスチックレンズ（実施例５〜９）に対し、順に、耐擦傷性試験工程、人工汗試験工程、耐候促進試験工程を施した。
<< Examples 5 to 9 >>
For the same type of plastic lens for eyeglasses (Examples 5 to 9), in which the durability of the coating was relatively weak in Examples 1 to 4, the scratch resistance test process, the artificial sweat test process, A weathering accelerated test process was performed.
耐擦傷性試験工程及び人工汗試験工程は、次に示す人工汗浸漬時間を除き、実施例１〜４と同様に行った。即ち、実施例５に対しては人工汗試験工程において１時間人工汗に浸漬し、実施例６に対しては３時間浸漬し、実施例７に対しては６時間浸漬し、実施例８に対しては１２時間浸漬し、実施例９に対しては２４時間浸漬した。 The scratch resistance test step and the artificial sweat test step were performed in the same manner as in Examples 1 to 4 except for the following artificial sweat immersion time. That is, Example 5 was immersed in artificial sweat for 1 hour in the artificial sweat test step, immersed in Example 6 for 3 hours, immersed in Example 7 for 6 hours, It was immersed for 12 hours, and for Example 9, it was immersed for 24 hours.
又、耐候促進試験工程において、人工汗浸漬後の各レンズをサンシャインウェザーメーター（スガ試験機株式会社製Ｓ８０Ｂ）に投入した。サンシャインウェザーメーターにおける設定は、ここでは温度６０℃・湿度５０％ＲＨとした。なお、擦傷部付きの耐擦傷性試験機、人工汗槽、及び耐候促進試験機としてのサンシャインウェザーメーター（ないし各種装置間においてレンズを渡す移送装置）により、レンズの耐久性試験装置を構成することができる。 Further, in the weather resistance acceleration test process, each lens after artificial sweat immersion was put into a sunshine weather meter (S80B, manufactured by Suga Test Instruments Co., Ltd.). Here, the setting for the sunshine weather meter was a temperature of 60 ° C. and a humidity of 50% RH. In addition, a lens durability test apparatus is composed of a scratch resistance tester with a scratched part, an artificial sweat tank, and a sunshine weather meter (or a transfer device for passing a lens between various devices) as a weather resistance acceleration tester. Can do.
［表２］に、実施例５〜９に係る各試験工程の結果を示す。 [Table 2] shows the results of the test steps according to Examples 5 to 9.
［表２］中の「傷の本数」は、蛍光灯を透過させた状態で目視により確認した、レンズ表面における傷の本数である。又、「外観」は、「◎」が傷なしを示し、「○」が非常に薄い傷ありを示し、「△」が薄い傷ありを示し、「×」が傷ありを示し、「××」が白い筋状傷ありを示す。これは、「人工汗浸漬」（人工汗試験工程）や「耐候試験」（耐候促進試験工程）においても同様である。 The “number of scratches” in [Table 2] is the number of scratches on the lens surface, which was visually confirmed in a state where it was transmitted through a fluorescent lamp. “Appearance” indicates “no scratch”, “◯” indicates very thin scratch, “Δ” indicates thin scratch, “×” indicates scratch, “XX” "Indicates white streaks. The same applies to “artificial sweat immersion” (artificial sweat test process) and “weather resistance test” (weather resistance accelerated test process).
実施例５のように、人工汗に１時間浸漬させた程度では、２４時間もの長期間に亘り耐候試験を行っても傷が見受けられなかった。しかし、更に長時間耐候試験を行えば、傷が顕著化する。実施例６のように人工汗に３時間浸漬させた場合、耐候試験２４時間後に薄い傷が見られる状態となった。実施例７のように６時間浸漬させた場合、耐候試験６時間後に薄い傷が見られる状態となった。実施例８のように１２時間浸漬させた場合、人工汗試験の段階で薄い傷を見ることができ、耐候試験実施後は傷がはっきりと見えた。実施例９のように２４時間浸漬させた場合、人工汗試験の段階で傷をはっきり見ることができ、耐候試験を２４時間実施すると白い筋状傷を視認することができ、耐久性の差の評価を白さやその範囲等でより一層付け易い状態となった。 As in Example 5, as long as it was immersed in artificial sweat for 1 hour, no flaws were observed even when the weather resistance test was conducted for a long period of 24 hours. However, if the weathering test is performed for a longer time, the scratches become prominent. When immersed in artificial sweat for 3 hours as in Example 6, thin scratches were observed after 24 hours of the weather resistance test. When immersed for 6 hours as in Example 7, a thin scratch was observed after 6 hours of the weathering test. When immersed for 12 hours as in Example 8, thin scratches could be seen at the stage of the artificial sweat test, and the scratches were clearly visible after the weathering test. When immersed for 24 hours as in Example 9, scratches can be clearly seen at the stage of the artificial sweat test, and when the weather resistance test is performed for 24 hours, white streaks can be visually recognized. The evaluation became easier to attach due to whiteness and its range.
以上によれば、耐擦傷性試験工程、人工汗試験工程、耐候促進試験工程をこの順で施すことにより、眼鏡プラスチックレンズの評価を適切に行うことができ、評価のし易さの度合から、好適には、人工汗試験工程を１２時間以上行うか、人工汗試験工程を６時間以上行い且つ耐候促進試験工程を６時間以上行うか、人工汗試験工程を３時間以上行い且つ耐候促進試験工程を２４時間以上行い、更に好適には人工汗試験工程を２４時間以上行い、更に好適には人工汗試験工程を２４時間以上行い且つ耐候促進試験工程を２４時間以上行う。 According to the above, by performing the scratch resistance test process, the artificial sweat test process, and the weather resistance acceleration test process in this order, it is possible to appropriately evaluate the spectacle plastic lens, from the degree of ease of evaluation, Preferably, the artificial sweat test process is performed for 12 hours or more, the artificial sweat test process is performed for 6 hours or more and the weather resistance promotion test process is performed for 6 hours or more, or the artificial sweat test process is performed for 3 hours or more and the weather resistance promotion test process is performed. 24 hours or more, more preferably the artificial sweat test step is performed for 24 hours or more, more preferably the artificial sweat test step is performed for 24 hours or more, and the weather resistance promotion test step is performed for 24 hours or more.
このように、耐候促進試験工程を最後に加えることにより、耐久性の差が顕在化し評価が容易となることについて、次のように考えることができる。即ち、傷が付加され、あるいは傷から水分や塩分等が浸入した状態で、熱や紫外線が作用すると、実際の使用時と同様、光学製品の傷からの劣化が促進される。特に、コーティングへの傷から水分等がコーティングと基材の間等へ入り込んだ状態で熱等が所定時間以上作用すると、コーティングの劣化の要因となり、コーティングの耐久性に影響が出る。耐久性に優れる光学製品では、もともと傷が付き難く、あるいは傷から水分等が入る余地が少なく、又は水分等が入っても熱等の作用に耐えることができ、耐久性に劣る光学製品では、その逆となる。 Thus, it can be considered as follows that the difference in durability becomes obvious and the evaluation becomes easy by adding the weather resistance acceleration test step last. In other words, when heat or ultraviolet rays act in a state where scratches are added or moisture or salt has entered from the scratches, degradation of the optical product from scratches is promoted as in actual use. In particular, if heat or the like acts for a predetermined time or more while moisture or the like has entered the coating and the base material from scratches on the coating, the coating deteriorates and the durability of the coating is affected. In optical products with excellent durability, scratches are not easily scratched, or there is little room for moisture etc. to enter from scratches, or even if moisture etc. enters, it can withstand the action of heat, etc. The reverse is true.
≪比較例１〜２≫
実施例５〜９と同様のレンズないし各工程につき、順序を耐擦傷性試験工程、耐候促進試験工程、人工汗試験工程としたものを、比較例１〜２として実施した。比較例１では、耐候促進試験工程を２４時間とし、比較例２では、耐候促進試験工程を６０時間とした。
<< Comparative Examples 1-2 >>
The same lenses or examples as in Examples 5 to 9 were used as Comparative Examples 1 and 2 in the order of the scratch resistance test process, the weather resistance acceleration test process, and the artificial sweat test process. In Comparative Example 1, the weather resistance promotion test process was 24 hours, and in Comparative Example 2, the weather resistance promotion test process was 60 hours.
［表３］に、比較例１〜２に係る各試験工程の結果を示す。 Table 3 shows the results of the test steps according to Comparative Examples 1 and 2.
比較例１では、耐候試験を２４時間行っても傷は見られず、人工汗試験の２４時間経過後にようやく非常に薄い傷のみ認める結果となった。又、比較例２では、６０時間という長時間の耐候試験をもってようやく薄い傷が認められ、その後人工汗に２４時間漬けてもはっきりとした傷は見られなかった。 In Comparative Example 1, no flaws were observed even when the weather resistance test was conducted for 24 hours, and only very thin flaws were finally recognized after 24 hours of the artificial sweat test. Further, in Comparative Example 2, a thin scratch was finally observed after a long-term weather resistance test of 60 hours, and no obvious scratch was observed even after being immersed in artificial sweat for 24 hours.
比較例１では、非常に薄い傷が見られるのみであるため、適切な評価をし難い。又、比較例２では、評価可能であるとしても、６０時間以上を要し、手間がかかる。 In Comparative Example 1, since only a very thin scratch is seen, it is difficult to make an appropriate evaluation. Moreover, even if it can evaluate in the comparative example 2, 60 hours or more are required and it takes time and effort.
≪比較例３〜４≫
実施例５〜９と同様のレンズないし各工程につき、順序を人工汗試験工程、耐擦傷性試験工程、耐候促進試験工程としたものを、比較例３〜４として実施した。比較例３では、人工汗試験工程を２４時間とし、比較例４では、人工汗試験工程を７２時間とした。
<< Comparative Examples 3-4 >>
The same lens or each process as in Examples 5 to 9 was performed as Comparative Examples 3 to 4 in the order of the artificial sweat test process, the scratch resistance test process, and the weather resistance acceleration test process. In Comparative Example 3, the artificial sweat test process was 24 hours, and in Comparative Example 4, the artificial sweat test process was 72 hours.
［表４］に、比較例３〜４に係る各試験工程の結果を示す。 In [Table 4], the result of each test process which concerns on Comparative Examples 3-4 is shown.
比較例３では、耐擦傷性試験を行っても傷は見られず、耐候試験の２４時間経過後でも非常に薄い傷しか見受けられない。又、比較例４では、７２時間という長時間の人工汗試験をもって、耐候試験１２時間以上で傷を認めることができる。 In Comparative Example 3, no scratches were observed even when the scratch resistance test was performed, and only very thin scratches were observed even after 24 hours of the weather resistance test. Further, in Comparative Example 4, scratches can be recognized in a weather resistance test of 12 hours or longer with a long-time artificial sweat test of 72 hours.
比較例３では、非常に薄い傷が見られるのみであるため、適切な評価をし難い。又、比較例４では、評価可能であるとしても、７２時間以上を要し、手間がかかる。 In Comparative Example 3, since only a very thin scratch is seen, it is difficult to make an appropriate evaluation. Further, in Comparative Example 4, even if evaluation is possible, it takes 72 hours or more and takes time and effort.
≪比較例５≫
実施例５〜９と同様のレンズないし各工程につき、順序を耐候促進試験工程、耐擦傷性試験工程、人工汗試験工程としたものを、比較例５として実施した。比較例５では、耐候促進試験工程を２４時間とし、人工汗試験工程を２４時間とした。
<< Comparative Example 5 >>
The same lens or each process as in Examples 5 to 9 was carried out as Comparative Example 5 in which the order was changed to a weather resistance acceleration test process, a scratch resistance test process, and an artificial sweat test process. In Comparative Example 5, the weather resistance promotion test process was 24 hours, and the artificial sweat test process was 24 hours.
［表５］に、比較例５に係る各試験工程の結果を示す。 Table 5 shows the results of each test process according to Comparative Example 5.
比較例５では、最後の人工汗試験（２４時間経過後）において非常に薄い傷を見ることができるものの、比較的に評価し辛い。 In Comparative Example 5, although a very thin wound can be seen in the final artificial sweat test (after 24 hours), it is relatively difficult to evaluate.
≪小括≫
比較例１〜５のような各種の順序ではなく、実施例１〜４のように耐擦傷性試験工程の後に人工汗試験工程を行い、あるいは実施例５〜９のように更に耐候促進試験工程を行うことにより、所要時間が少なく、耐久性について優劣のはっきりした状態で適切な評価が可能となる。又、各工程に係る時間を上述したような適切なものとすると、更に短時間で確実に評価を下すことが可能となる。
≪Summary≫
Instead of various orders as in Comparative Examples 1 to 5, an artificial sweat test process is performed after the scratch resistance test process as in Examples 1 to 4, or a weather resistance acceleration test process as in Examples 5 to 9 By performing the above, it is possible to perform appropriate evaluation in a state where the required time is short and the durability is clearly determined. In addition, if the time for each process is appropriate as described above, the evaluation can be reliably performed in a shorter time.
Claims (2)
当該耐擦傷性試験工程後の前記光学製品を、所定時間人工汗に浸漬させる人工汗試験工程と、
前記人工汗試験工程後の前記光学製品を、水・紫外線の内の少なくとも１つが室内環境に比べて多い環境下に特定時間定置する耐候促進試験工程を有しており、
前記耐擦傷性試験工程、前記人工汗試験工程、及び前記耐候促進試験工程は、それぞれ１回のみ行われる
ことを特徴とする光学製品の耐久性試験方法。 A scratch resistance test process in which the scratched portion is pressed against the optical product in a state where a predetermined load is applied, and the optical product and the scratched portion are moved relative to each other.
An artificial sweat test step in which the optical product after the scratch resistance test step is immersed in artificial sweat for a predetermined time; and
Wherein the optical product after artificial sweat test step, at least one of the water-UV but which have a weather accelerated test step to position a specific time in an environment larger than the indoor environment,
The abrasion resistance test step, the artificial sweat test process, and the weathering accelerated test process, the durability test method for optical products wherein Rukoto performed only once.
前記耐候促進試験工程における特定時間が２４時間以上である
ことを特徴とする請求項１に記載の光学製品の耐久性試験方法。 A predetermined time in the artificial sweat test step is 24 hours or more, and
2. The method for testing durability of an optical product according to claim 1, wherein the specific time in the weathering accelerated test step is 24 hours or more.
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