TWI716369B - 含有聚酯樹脂之功能性薄片及使用其之透鏡 - Google Patents

含有聚酯樹脂之功能性薄片及使用其之透鏡 Download PDF

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TWI716369B
TWI716369B TW104140159A TW104140159A TWI716369B TW I716369 B TWI716369 B TW I716369B TW 104140159 A TW104140159 A TW 104140159A TW 104140159 A TW104140159 A TW 104140159A TW I716369 B TWI716369 B TW I716369B
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Taiwan
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resin
lens
layer
aromatic polycarbonate
mass
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TW104140159A
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English (en)
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TW201631029A (zh
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中村恭介
後藤拓也
鶴谷浩
光畑和久
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日商三菱瓦斯化學股份有限公司
日商Ｍｇｃ菲爾須特股份有限公司
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Abstract

依據本發明，藉由功能性薄片而可提供上述著色透鏡，該功能性薄片之特徵係以保護層夾住偏光薄膜層、調光層或該等之組合的功能層者，前述保護層之至少單面具有由樹脂(C)而成之層，該樹脂(C)為1,4-環己烷二甲醇與1,4-環己烷二羧酸聚縮合而得的聚酯樹脂(A)與芳香族聚碳酸酯(B)，相對於(A)與(B)之合計100質量份，調配有(A)10~100質量份，調配有(B)0~90質量份的樹脂(C)。

Description

含有聚酯樹脂之功能性薄片及使用其之透鏡
本發明係有關具有偏光性或調光性之功能性薄片，更有關將該功能性薄片彎曲加工成曲面形狀之彎曲眼鏡(eye wear)或者於該彎曲加工後於一面上使透鏡用透明樹脂射出成形之射出眼鏡，尤其是關於經染色處理之著色眼鏡。
芳香族聚碳酸酯薄片由於透明性、耐衝擊性、耐熱性優異且為輕量，故以使用於以液晶顯示器為主、建物之窗或汽車之天窗、海上運動、冬季運動、釣魚等所用之太陽眼鏡或護目鏡。
然而，芳香族聚碳酸酯薄片由於光彈性常數大，故於實施彎曲加工成如太陽眼鏡或護目鏡之球面或非球面之面形狀時，具有容易因延遲(retardation)而產生著色干涉條紋，該著色干涉條紋損及外觀，而引起眼睛疲勞等之問題。
諄對實施彎曲加工時產生之延遲，對保護層中使用之芳香族聚碳酸酯薄片預先施以延伸處理預先產生 大的延遲，而使著色干涉條紋看不見之芳香族聚碳酸酯偏光薄片(以下記載為延伸聚碳酸酯偏光薄片)為已知(專利文獻1)，已使用於偏光透鏡中外觀或眼睛疲勞亦優異之製品中。
另一方面，基於對前述之延伸聚碳酸酯偏光薄片實施彎曲加工而形成之偏光透鏡進一步提高耐衝擊性、或者形成具有焦點折射力之矯正用透鏡之目的，已知有將彎曲加工成球面或非球面之面形狀之延伸聚碳酸酯偏光薄片插入模具內並射出芳香族聚碳酸酯而成形之偏光透鏡(專利文獻2、3)。
又，已提案一種偏光透鏡，其係使用由含有1,4-環己烷二甲醇與二羧酸成分之聚酯樹脂與芳香族聚碳酸酯所成之聚合物合金作為不損及芳香族聚碳酸酯樹脂之優異耐熱性或耐衝擊性，而與以插入模製射出成形射出之芳香族聚碳酸酯樹脂強固地熔融一體化之透明樹脂材料(專利文獻4)。
於如此形成之透鏡表面，適當形成硬化膜、抗反射塗層等，其次藉由透鏡研磨、打孔、螺絲固定等而固定於框架上作成太陽眼鏡或護目鏡。
不過，於要求流行性之以眼鏡透鏡用途等為代表之透明性樹脂之成形體之用途中，當然須具有光學特性(例如透明性、高折射率等)、耐衝擊性等之特性以外，亦強烈要求可藉由簡便之染色方法容易地染色。例如以使透鏡之上部透過率較低、下部透過率較高之於著色濃度具 有灰階進行染色時，亦賦予看向遠方或空中時之防眩性高，眼前之視界明亮之作業性良好的機能性。
然而，以雙酚A型聚碳酸酯為代表之芳香族聚碳酸酯類，藉一般染色方法(例如利用分散染料之染色等)時，具有染色性極差之問題點，為了進行染色，有必要經過藉由可染色之硬化膜材於透鏡上設置膜層並使該膜層染色等之繁雜步驟。此種使用可染色性硬化膜之方法，有硬化膜之耐擦傷性不充分進而成本增大之問題。
基於解決此等問題之目的，已提案有使用將由雙酚A而成之芳香族聚碳酸酯與脂環式二羥基化合物衍生之聚碳酸酯樹脂摻合而成之聚合物合金，而提高染色性之方法(專利文獻5)。
另一方面，認知芳香族聚碳酸酯表面易於損傷，作為其對策必須設置硬化膜層，但對染色之透鏡施以硬化膜時，於以酸-鹼或醇類之洗淨步驟以及硬化膜液塗佈步驟中會有染料脫色之問題。專利文獻5中，關於脫色及硬化膜並無記載。專利文獻4中揭示使用含有1,4-環己烷二甲醇之PC合金之偏光眼鏡透鏡，雖記載根據用途可於其表面適當實施硬化膜、防霧塗層、抗反射塗層等之各種習知表面處理，及用於著色之染色處理，但關於副硬化膜之染色透鏡並無具體記載。
[先前技術文獻] [專利文獻]
[專利文獻1]日本特開平03-39903號公報
[專利文獻2]日本特開平08-52817號公報
[專利文獻3]日本特開平08-313701號公報
[專利文獻4]日本特開2010-39357號公報
[專利文獻5]日本特開2011-132422號公報
本發明之課題在於提供染色性良好、亦可防止脫色之功能性薄片。且課題在於藉由使用該功能性薄片且藉由附有硬化膜而提供耐擦傷性高的著色眼鏡(eye wear)。
本發明人發現藉由使用利用特定材料之功能性薄片不僅可使透鏡之染色性良好，而且亦可防止脫色，故對透鏡染色並於其上附加一般硬化膜而可提供耐擦傷性亦高之著色透鏡，因而完成本發明。
亦即，本發明係如下。
<1>一種功能性薄片，其係於保護層I與保護層II之間，具有偏光薄膜、調光層或此等之組合之功能層的功能性薄片，其中前述保護層之中至少單面具有由下述樹脂(C)而成之層，該樹脂(C)為1,4-環己烷二甲醇與1,4-環己烷二羧酸聚縮合而得的聚酯樹脂(A)與芳香族聚碳酸酯 (B)，相對於(A)與(B)之合計100質量份，調配有(A)10~100質量份，調配有(B)0~90質量份的樹脂(C)。
<2>如上述<1>之功能性薄片，其中具有由樹脂(C)而成之層的保護層為由樹脂(C)而成之層與由芳香族聚碳酸酯樹脂而成之層係藉由共擠出成形法被層合一體化者，且由樹脂(C)而成之層為表面層。
<3>一種透鏡，其係如上述<1>或<2>之功能性薄片被彎曲加工成球面或非球面。
<4>一種透鏡，其係如上述<1>或<2>之功能性薄片為將由樹脂(C)而成之層被彎曲加工成凸面表面後，插入模具內，於凹面側使透明樹脂一體射出成形而得。
<5>一種著色透鏡，其係對如上述<3>或<4>之透鏡進行被染色處理而得。
<6>如上述<3>~<5>中任一項之透鏡，其中前述透鏡具有硬化膜。
<7>一種眼鏡(eye wear)，其係使用如上述<3>~<6>中任一項之透鏡。
藉由本發明，不僅可使透鏡之染色性良好，而且亦可防止脫色，故對透鏡染色並於其上附加一般硬化膜而可提供耐擦傷性亦高之著色透鏡。
以下，詳細說明本發明。
本發明所用之聚酯樹脂(A)可使用例如1,4-環己烷二甲醇與1,4-環己烷二羧酸進行酯化或酯交換反應而聚縮合所得的聚酯樹脂，作為可以市售品獲得之聚酯樹脂，例示有三菱化學製之聚酯系熱可塑性彈性體「PRIMALLOY CP300」。更好為由1,4-環己烷二甲醇與1,4-環己烷二羧酸所成之聚(1,4-環己烷二甲醇-1,4-環己烷二羧酸酯)樹脂，作為可以市售品獲得之聚酯樹脂，例示有三菱化學製之聚酯系熱可塑性彈性體「PRIMALLOY CP200」或「PRIMALLOY CP201」。
本發明所用之芳香族聚碳酸酯樹脂(B)係芳香族二羥基化合物或其與少量之聚羥基化合物與碳醯氯或碳酸之二酯反應而作成之可具有分支之熱可塑性聚碳酸酯聚合物。本發明所使用之芳香族二羥基化合物係以下述一般式(a)或一般式(b)表示之化合物。
Figure 104140159-A0202-12-0006-1
上述一般式(a)中，
Figure 104140159-A0202-12-0007-2
此處，一般式(a)或一般式(b)中，R1與R2為氫原子或碳數1~10之烷基或鹵素，R1與R2可相同亦可不同。且m及n為表示取代基數之0~4之整數。
關於一般式(a)中之X，R3與R4為氫原子或碳數1~10之烷基或苯基，R3與R4亦可結合形成環。
以上述一般式(a)或一般式(b)表之芳香族二羥基化合物可使用例如雙(4-羥基苯基)甲烷、1,1-雙(4-羥基苯基)乙烷、2,2-雙(4-羥基苯基)丙烷、2,2-雙(4-羥基苯基)丁烷、2,2-雙(4-羥基苯基)辛烷、雙(4-羥基苯基)苯基甲烷、2,2-雙(4-羥基-3-甲基苯基)丙烷、1,1-雙(4-羥基-3-第三丁基苯基)丙烷、2,2-雙(4-羥基-3-溴苯基)丙烷、1,1-雙(4-羥基苯基)環戊烷、1,1-雙(4-羥基苯基)環己烷、4,4’-二羥基二苯醚、4,4’-二羥基-3,3’-二甲基苯醚、4,4’-二羥基苯基硫醚、4,4’-二羥基-3,3’-二甲基二苯硫醚、4,4’-二羥基二苯基硫醚、4,4’-二羥基-3,3’-二甲基二苯基硫醚、4,4’-二羥基二苯基碸、4,4’-二羥基二苯基碸、4,4’-二羥基-3,3’-二甲基二苯基碸等。該等中，基於強度、耐熱性、耐久性或彎曲加工性之觀點，特佳為2,2’-雙(4-羥基苯基)丙烷(雙酚A：BPA)。且，以一般式(a)表示之芳香族二羥基化合物亦可併用2種以上。此等芳香族聚碳酸酯樹脂(B)之玻璃轉移點為135~155℃左右。
本發明之芳香族聚碳酸酯樹脂(B)中，亦可添加其他成分，作為其他成分並未特別限制，可根據目的適當選擇，舉例為例如抗氧化劑、脫模劑、紫外線吸收劑、流動性改質劑、結晶核劑、強化劑、染料、抗靜電劑、抗菌劑等。該等可單獨使用1種亦可併用2種以上。
進而，關於芳香族聚碳酸酯樹脂(B)之分子量，基於薄片本身之成形而言，黏度平均分子量較好為12,000~40,000，基於薄片強度、耐熱性、耐久性或彎曲加工性之方面，特佳為20,000~35,000者。
本發明中之由樹脂(C)所成之層係聚酯樹脂(A)與芳香族聚碳酸酯(B)，相對於(A)與(B)之合計100質量份，調配有(A)10~100質量份，調配有(B)0~90質量份而成。基於由樹脂(C)所成之層之染色性、染色後之耐脫色性之方面而言，較好調配有(A)20~50質量份，調配有(B)50~80質量份，更好調配有(A)20~40質量份，調配有(B)60~80質量份。基於功能性薄片之耐熱性之觀點，芳香族聚碳酸酯樹脂(B)之調配量較好為50質量份以上。
本發明之由樹脂(C)所成之層之調配方法可藉由將個別製造之聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)之各固體混合，藉由混練機混練而製造，且亦可於熔融狀態之聚酯樹脂(A)中添加固體之芳香族聚碳酸酯樹脂(B)，或者於熔融狀態之芳香族聚碳酸酯樹脂(B)中添加固體之聚酯樹脂(A)並藉由混練機混練而製造。或者，使熔融狀態之聚酯樹脂(A)與熔融狀態之芳香族聚碳酸酯樹脂(B)混合 並藉由混練機混練而製造。
混練可以連續式進行亦可以批式進行。作為混練機，可使用擠出機、葉片混練機(labo plastomill)或捏合機等，但若連續進行混練則較好使用擠出機，若以批式進行混練則較好使用葉片混練機或捏合機。又，使用藉由熔融聚縮合法製造之聚碳酸酯樹脂時，基於避免混練時之酯交換反應之見解，宜於觸媒失活後進行混練。
又，本發明之由樹脂(C)所成之層之又一調配方法，亦有使聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)溶解於溶劑中，注入鑄模後，蒸發溶劑之方法。作為溶劑係使用例如二氯甲烷、氯仿、甲酚等。使用該方法時，由於可同時溶解添加添加劑故為便利。
本發明之由樹脂(C)所成之層中，在不損及其物性之範圍內可根據目的添加各種習知之添加劑。例如可較好地實施添加熱安定化劑、水解安定劑、抗氧化劑、顏料、染料、強化劑、填充劑、紫外線吸收劑、滑劑、脫模劑、結晶核劑、可塑劑、流動性改良劑、抗靜電劑、抗菌劑等。
該等添加劑可在進行摻合混練前，事先添加於聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)之任一者或兩者中，亦可於摻合混練時同時添加混練，亦可摻合後混練。
本發明之由樹脂(C)所成之層可於顆粒化後，藉由射出成形、壓縮成形、擠出成形等製造。成形方法可使用以往習知之方法。
本發明具有由調配有聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)之樹脂(C)所成之層作為至少單面之保護層。前述保護層通常厚度為50μm~1.5mm，較好為100μm~800μm。且本發明之保護層可以單層使用由樹脂(C)所成之層，更好為前述由樹脂(C)而成之層與由芳香族聚碳酸酯樹脂而成之層被層合一體化之多層薄片或薄膜。層合方法並未特別限定，但共擠出法由於可密著性良好地層合故較期望。使用由芳香族聚碳酸酯樹脂而成之層與由樹脂(C)而成之層經層合一體化之多層薄片或薄膜，可獲得耐熱性、耐衝擊性提高之保護層。該情況下，較好以由樹脂(C)而成之層位於功能性薄面之表面側，由芳香族聚碳酸酯樹脂而成之層位於功能層側之方式，對於功能層配置保護層。
芳香族聚碳酸酯之光彈性常數大，基於應力或配向所致之雙折射而易於發生著色干涉條紋。因此，本發明之具有由樹脂(C)而成之層之薄片或薄膜，較好藉由預先具有較大之延遲值，而看不到著色干涉條紋，至少延遲值為2,000nm以上，20,000nm以下，較好為3,000nm以上，尤其考慮加工步驟之降低時，較好設為4,000nm以上。延遲值越高越看不到著色干涉條紋，但由於延遲值表示配向度或殘留應力之大小，故有延遲值高意指表面形狀之精度低之缺點。該著色干涉條紋可透過偏光薄膜而先被人眼看見。因此，作為高延遲之薄片之效果係因為使用於偏光薄膜之光入射側亦即用於人眼之相反側。
本發明之偏光薄膜層(或偏光性之功能層)較好使用以二色性之有機染料染色聚乙烯醇系樹脂之薄膜並延伸而製造者。該聚乙烯醇類例示有聚乙烯醇(PVA)；PVA之乙酸酯構造殘留微量者及PVA衍生物或類似物的聚乙烯甲縮醛、聚乙烯乙縮醛、乙烯-乙酸乙烯酯共聚物皂化物等，特佳為PVA。將該薄膜於一方向延伸，同時含浸或吸附二色性有機染料，並適當固定、乾燥作成偏光之薄膜。
作為PVA薄膜，重量平均分子量為50,000~350,000，較好為150,000~300,000。原料薄膜厚度通常為100~300μm左右，PVA偏光薄膜通常為10~50μm。
PVA薄膜之延伸倍率為2~8倍，雖係根據目的適當選擇，但基於延伸後之強度之觀點較好為3~5倍。
本發明之調光(光致變色)層例如(1)可使用預先製造之調光性之薄膜，且(2)亦可使用調配調光性有機化合物之調光性之接著劑層。前述(1)之情況，係於樹脂薄膜中均一分散調光性有機化合物者，可藉由澆鑄法、熔融擠出法、進而熱擴散法等習知方法製造。
本發明之功能性薄片沖壓成各個透鏡用形狀等而加工後，以使由樹脂(C)所成之層成為凸面表面之方式施以彎曲加工。作為射出透鏡使用時，彎曲加工後插入模具內，於凹面側使透明樹脂一體射出成形可製作透鏡。作為該透明樹脂，舉例為芳香族聚碳酸酯、非晶性聚烯烴(脂環式聚烯烴)、聚丙烯酸酯、聚烯烴、乙醯基纖維素、 聚苯乙烯、聚酯、透明聚醯胺、及芳香族聚碳酸酯與脂環式聚酯之組成物，或該等之混合物等。於要求耐衝擊性、耐熱性之太陽眼鏡或護目鏡中，較好為芳香族聚碳酸酯。其中更好為雙酚A型聚碳酸酯。
可對於本發明之功能性薄片及使用該功能性薄片之透鏡施以染色處理。染色方法可使用習知之各種染色方法。亦即，代表性之染色方法舉例為例如於水性介質中或有機溶劑中，或者該等之混合介質中，使用染料(例如分散染料等)、顏料等而染色之方法等。其中，更好為於水性介質中以分散染料染色之方法。作為染料、顏料並未特別限制，可適當地使用纖維、樹脂等之染色中使用之習知各種染料、顏料。
其次，可施以硬化膜處理。樹脂表面與玻璃比較已知較易損傷，於太陽眼鏡或護目鏡中，為了提高耐擦傷性，強烈要求於其表面層合硬化膜層。關於硬化膜之材質或加工條件，由於本發明之功能性薄片具有優異染色性，故不受硬化膜層可否染色之限制，可自對於耐擦傷性、外觀、功能性薄片，或者對於接著經塗覆之鏡面塗覆或抗反射塗覆等之無機層之密著性優異者中適當選擇。可藉浸漬法、噴霧法、輥塗法、旋轉塗佈法等習知方法作為塗佈方法，將硬化膜液塗佈於基材上並乾燥，根據需要進行加熱而形成被膜層。硬化膜液可藉由將硬化膜組成物溶解或分散於溶劑中，進而根據需要以稀釋溶劑稀釋而製作。稀釋溶劑可舉例為醇類、溶纖素類、酮類、酯類、醚 類等。
且通常於塗佈前進行前處理。前處理舉例為藉由表面之酸-鹼之脫脂處理、超音波洗淨等。藉由該等前處理而去除對硬化膜層之密著性有影響之污漬。再者，藉醇等進行前處理液之去除，塗佈硬化膜液，形成硬化膜層。
其次，藉由透鏡研磨、打孔、螺絲等而固定於框架上作成眼鏡(太陽眼鏡或護目鏡等)。
[實施例]
以下說明本發明之實施例，但本發明絕不限定於以下之實施例。
(實施例1)
<保護層薄片之製作>
將聚酯樹脂(A)(三菱化學製，商品名：PRIMALLOY CP201)，使用具有軸徑30mm之單軸擠出機、連結於擠出機之給料管、與連結於給料管之T模嘴之擠出裝置(PLAENGI製，PSV-30)，成形保護層薄片。於軸徑30mm之單軸擠出機連續導入聚酯樹脂(A)，以汽缸溫度250℃之條件擠出。以與其連結之溫度250℃之T模嘴擠出成薄片狀，以鏡面修飾輥邊轉印鏡面邊冷卻，獲得聚酯樹脂(A)之薄片。此時輥之設定溫度為100℃。
<偏光薄膜之製作>
將聚乙烯醇(KURARAY股份有限公司製，商品名：VF-PS#7500)於35℃水中膨潤270秒，邊延伸2倍。
接著，以含有Kaya Las Supra Blue BWL、Sumilight Red 4B、Sumilight Supra Orange 2GL及10g/L無水硫酸鈉之35℃水溶液中染色邊延伸3倍。
該染色薄膜於含有乙酸鎳2.3g/L及硼酸4.4g/L之水溶液中於35℃浸漬120秒，並延伸4倍。將該薄膜保持緊張狀態之狀態於室溫進行3分鐘乾燥後，於110℃加熱處理3分鐘，獲得透過率35%、偏光度99%之偏光薄膜。
<功能性薄片之製作>
對於聚胺基甲酸酯預聚物50重量份，使用硬化劑5重量份、作為溶劑之乙酸乙酯60重量份，調製接著劑組成物。該接著劑組成物使用棒塗佈器#24塗佈於前述偏光薄膜上，於70℃乾燥10分鐘後，以層合機將前述保護層薄片與上述偏光薄膜上之接著劑組成物貼合。所得之層合薄片之偏光薄膜側以與上述同樣之方法塗佈接著劑組成物，同樣貼合另一片保護層薄片，獲得功能性薄片。硬化後之接著劑塗膜厚度為9~11μm。且保護層薄片之厚度分別為0.3mm。
<彎曲加工>
所得功能性薄片以真空抽吸，使用具備矽橡膠薄片被 覆之凹球面彎曲模(曲率半徑66.81mm，基礎杯7.932)，於設定於表面溫度145℃之母模之矽橡膠薄片上載置切割片，開始真空吸引，其次以矽橡膠薄片被覆之公模加壓進行球面彎曲加工。又，此處所稱之基礎杯為透鏡前面之曲率530除以毫米單位之曲率半徑之值。
<射出成形透鏡化>
使以彎曲加工之功能性薄片之凸面側接觸射出成形模具之方式插入，於凹面側使芳香族聚碳酸酯樹脂(三菱工程塑膠公司製，商品名：UPILON CLS3400)射出成形而透鏡化。射出成形條件分別設定為樹脂溫度300℃、模具溫度80℃、保壓60MPa。
<透鏡染色>
將作為分散染料之BPI Braun#31100(Brain Power Inc.,製)88ml添加於純水1L中，保溫於93℃獲得茶色之染色液。前述偏光透鏡於93℃浸漬獲得著色透鏡。以分光光度計(島津製作所製；商品名「UV-2700」)測定前述著色透鏡之分光透過率，評價染色前後之透過率差(染色後之染色量)。此處，透過率係以JIS Z-8701規定之使用C光源之2度視野中之視感透過率。
<醇脫色>
上述製作之著色透鏡於甲醇中浸漬30分鐘，評價染 色前與脫色後之透過率差(脫色後之染色量)。進而，評價浸漬前後之脫色率。此處所稱之脫色率係使用數式[(染色後之染色量-脫色後之染色量)/(染色後之染色量)×100]計算之值。透過率測定係使用著色性評價中所用之試驗機，以同樣方法測定。
<硬化膜>
對上述著色透鏡以浸漬塗佈器施以硬化塗覆處理，獲得附硬化膜之著色透鏡。
染色前後之透過率及染色量、以及脫色後之透過率、染色量及脫色率之值示於以下表1。
(實施例2)
實施例1中，對於聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)(三菱工程塑膠公司製，商品名：UPILON E-2000(以下同))之合計100質量份，調配40質量份之聚酯樹脂(A)，調配60質量份之芳香族聚碳酸酯樹脂(B)，製作保護層薄片以外，與實施例1同樣製作著色透鏡，進行同樣評價。評價結果示於表1。
(實施例3)
實施例1中，對於聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)之合計100質量份，調配30質量份之聚酯樹脂(A)，調配70質量份之芳香族聚碳酸酯樹脂(B)，製作保 護層薄片以外，與實施例1同樣製作著色透鏡，進行同樣評價。評價結果示於表1。
(實施例4)
實施例1中，對於聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)之合計100質量份，調配20質量份之聚酯樹脂(A)，調配80質量份之芳香族聚碳酸酯樹脂(B)，製作保護層薄片以外，與實施例1同樣製作著色透鏡，進行同樣評價。評價結果示於表1。
(實施例5)
實施例1中，對於聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)之合計100質量份，調配10質量份之聚酯樹脂(A)，調配90質量份之芳香族聚碳酸酯樹脂(B)，製作保護層薄片以外，與實施例1同樣製作著色透鏡，進行同樣評價。評價結果示於表1。
(實施例6)
實施例1中，使用藉由共擠出法製造之由聚酯樹脂(A)與芳香族聚碳酸酯樹脂所成之層合體作為保護層薄片，並使用將芳香族聚碳酸酯樹脂層與塗佈於偏光薄膜上之接著劑組成物貼合之方式層合而成之功能性薄片以外，與實施例1同樣製作著色透鏡，進行同樣評價。評價結果示於表1。
(實施例7)
實施例5中，除了保護層薄片厚度設為0.7mm，未射出成形透鏡化以外，與實施例5同樣製作著色透鏡，進行同樣評價。評價結果示於表1。
(比較例1)
實施例1中，除使用芳香族聚碳酸酯樹脂(B)代替聚酯樹脂(A)，製作保護層薄片以外，與實施例1同樣製作著色透鏡，進行同樣評價。評價結果示於表1。
Figure 104140159-A0202-12-0018-3
如表1所示，實施例1中，染色後之透過率比染色前之透過率低30%以上，為較佳結果。進而，脫色率亦接近3%，為較佳結果。再者，藉由硬化膜處理而耐擦傷性亦良好。本發明中，染色後之透過率較好比染色前之透過率低5%以上，更好15%以上，特佳為25%以上。又本發明中，脫色率較好為30%以下，更好為10%以下，特佳為5%以下。另一方面，比較例1中，染色後之透過 率僅比染色前之透過率低3.7%，脫色率亦為76%而極高。

Claims (6)

  1. 一種透鏡，其係於保護層I與保護層II之間，具有偏光薄膜層、調光層或此等之組合之功能層的功能性薄片被彎曲加工成球面或非球面而成的透鏡，其中前述保護層之中至少單面的保護層為具有由下述樹脂(C)而成之層者，該樹脂(C)為1,4-環己烷二甲醇與1,4-環己烷二羧酸聚縮合而得的聚酯樹脂(A)與芳香族聚碳酸酯樹脂(B)，相對於(A)與(B)之合計100質量份，調配有(A)10~100質量份，調配有(B)0~90質量份的樹脂(C)。
  2. 如申請專利範圍第1項之透鏡，其中具有由樹脂(C)而成之層的保護層為由樹脂(C)而成之層與由芳香族聚碳酸酯樹脂而成之層被層合一體化者，且由樹脂(C)而成之層為表面層。
  3. 如申請專利範圍第1或2項之透鏡，其中功能性薄片為由樹脂(C)而成之層被彎曲加工成凸面表面而成，於凹面側，透明樹脂被一體射出成形而成。
  4. 一種著色透鏡，其係如申請專利範圍第1或2項之透鏡為被染色處理而成。
  5. 如申請專利範圍第1或2項之透鏡，其中前述透鏡具有硬化膜(Hard coat)。
  6. 一種眼鏡(eye wear)，其係使用如申請專利範圍第1~5項中任一項之透鏡。
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