201219467 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種延長抗靜電膜之抗靜電 能力的方法，特別是指一種延長適用於電子包裝材 料的抗靜電膜之透明抗靜電能力的方法，及運 用此方法所製成的透明抗靜電膜。 【先前技術】 目前最廣泛用於形成抗靜電層的材料為PED〇T:PSS溶 液，其是透過在聚（3,4-伸乙基二氧嗔吩）[p〇iy(3,4· ethylenedioxythiophene)，也就是上述的PEDOT]中加入聚 (苯乙烯續酸酯）[poly(styrenesulfonate)，也就是上述的pss] 而製得。然而’在實際使用由PED0T:PSS溶液所製得的抗 靜電層時，卻發現因為PED0T容易受到環境中紫外光、氧 氣及熱等因子的影響而發生降解情形，導致PEDOT的抗靜 電效能減弱，更讓抗靜電層的使用週期縮短。為了解決上 述問題，目前主要是利用增加抗靜電層厚度的手法來減緩 抗靜電效能的衰退速度，但此方法會使成本增加，更致使 產品競爭力下降。 US 7,087,351揭示一種電控顯示器，其包括至少一基 材、至少一設置於該基材上的電控影像層（electrically modulated imaging layer)、至少一導電層及至少一抗靜電 層。該抗靜電層可使用PED0T:PSS(商品名『Baytron』）， 而該導電層可分為主導電層及第二導電層，該第二導電層 含有氧化銦錫（indium-tin-composite oxide，ITO)、氧化鋅或 201219467 氧化鈽等氧化物。該等導電層僅提供導電之功能，與抗靜 電層間並無交互關係’亦不對抗靜電層之使用壽命提供任 何之貢獻。此類顯示器生產後即封裝，故抗靜電層即被封 裝於封裝忒内。於此狀況下，抗靜電層係與外界完全隔 絕，而不受前述環境因子的影響，故不致產生抗靜電效能 衰減之問題。 US 6,921，576揭示一種用於形成一具有較佳硬度、抗磨 損性之抗靜電膜的抗靜電塗佈組成物。該抗靜電塗佈組成 物包含（A)多數個具有側鏈之無機氧化物粒子；（B)一抗靜電 劑，含有至少一選自於下列所構成之群組：含四級銨鹽之 π刀子、含四級敍鹽之石夕烧偶合劑及矽烧偶合劑的水解縮 合物，以及（C)具有至少三個（甲基）丙烯醯基之多官能（甲基） 丙烯酸酯。此專利主要運用特殊經改質的無機氧化物粒子 來提昇抗靜電膜的硬度及抗磨損性，更利用特定抗靜電 劑，才可讓抗靜電膜的抗靜電性質提昇。由上述内容可 知，此專利的組成物除了需運用特定材料，還需額外花費 時間製備特定經改質的無機粒子及抗靜電劑，且後續將此 專利的組成物塗佈於一塑膠基材時，所塗佈的厚度範圍需 控制在1〜50 μιη，就整體製程及後續應用而言，步驟過於 繁複且無法節省製造成本。此外，該專利所揭示之技術並 未述及任何可延長抗靜電塗佈組成物使用之可能。 由上述可知，現有針對抗靜電膜的研發，大多致力於 乂昇抗靜電膜的抗靜電性、硬度或抗磨損性等性質，而未 就如何延長抗靜電膜的抗靜電能力進行探討。特別是就用 201219467 於電子包裝材料的抗靜電膜，因為電子元件容易受到靜電 影響而影響使用效能或甚而損壞，所以電子包裝材料除了 需具備透明度及良好機械性f之外，更期望可長時間維持 抗靜電能力。因此’如何能夠使抗靜電膜保有透明度且長 時間維持抗靜電能力’仍有待研發製程簡單又可降低生產 原料成本的方法，以提昇產品之應用領域及競爭性。 【發明内容】 為了解決習知的電子包裝材料之抗靜電能力不能夠長 時間維持的問題’同時兼顧包裝材料的透明性及製造成 本’本案發明人在多方試驗後，研發出—種有效的改善方 案，其係藉由於製備抗靜電層的過程中，於f知的抗靜電 塗佈液中混人特定比例的改質劑，即可使所製成的抗靜電 膜保有透明性，且能長時間維持合乎需求的表面阻抗，也 就是能長時間維持抗靜電能力。 因此，本發明之一目的，即在提供一種延長透明抗靜 電膜之抗靜電能力的方法。本發明方法不需增加抗靜電層 的厚度’只需運用簡單製程及低成本，就能有效延長抗靜 電膜的抗靜電能力。 於是，本發明的延長透明抗靜電膜之抗靜電能力的方 法，該透明抗靜電膜具有一基材及一抗靜電層，該方法是 使忒抗靜電層透過在該基材上塗佈一層含一抗靜電組成物 及一溶劑之塗佈液，之後去除該塗佈液中之溶劑而形成。 該抗靜電組成物包括-導電冑分子組份及多數個氣化飾粒 子。以該抗靜電組成物的總重為1 00 wt%計，該等氧化飾粒 201219467 子的含量範圍為wt%，且該等氧化鈽粒子之粒徑範圍 為10〜190nme該抗靜電層具有介於1〇5〜1〇9〇之表面阻 抗，厚度為0.18〜0.5陣，且該抗靜電膜具有不高於2%之 霧度。 本發明之另一目的在於提供一種透明抗靜電膜。 $本發明透明抗靜電膜具有不高於2%之霧度，及一介於 10〜10 Ω之表面阻抗，且包含一基材及—設置於該基材上 之抗靜電層。該抗靜電層的厚度為〇 18〜〇 5 _，且是由 一抗靜電組成物所構成，該抗靜電組成物包括一導電高分 子組份及多數個粒徑介於1〇〜19〇 nm的氧化鈽粒子。以該 抗靜電組成物的總重為100 wt%計，該等氧化鈽粒子的含量 範圍為1〜1 〇 wt%。 經本案發明人多次實驗後獲致，僅需藉由在習知導電 同刀子塗佈液中混入氧化鈽粒子，並藉由控制氧化鈽粒子 之用量與粒徑，即可透過氧化鈽粒子於導電高分子塗佈液 中之作用，使得抗靜電膜得以在抗靜電層厚度低於丨pm及 低製造成本之情況下，讓所製得的抗靜電膜即便在受到紫 外光及氧氣等環境影響下，仍可使抗靜電膜在維持既有的 透明度下，將使用壽命有效地延長2倍以上。而當後續運 用至靜電防護電子包裝材料時，由於本發明透明抗靜電膜 可提供較長時間的抗靜電能力，因而可延長本發明透明抗 靜電膜的使用壽命，以避免電子元件受到靜電影響。 【實施方式】 本發明之延長透明抗靜電膜之抗靜電能力的方法是使 201219467 該透明抗靜電膜之抗靜電層透過在該基材上塗佈一層含一 抗靜電組成物及一溶劑之塗佈液，之後去除該塗佈液中之 溶劑而形成。該抗靜電組成物包括一導電高分子組份及多 數個氧化鈽粒子。以該抗靜電組成物的總重為1〇〇 Wt%計， 該等氧化鈽粒子的含量範圍為1〜10 wt%，且該等氧化鈽粒 子之粒徑範圍為1〇〜190 nm。該抗靜電層具有介於1〇5〜 ι〇9ω之表面阻抗，且該抗靜電層的厚度為〇 18〜〇 5 ^爪。 該透明抗靜電膜具有不高於2%之霧度。201219467 VI. Description of the Invention: [Technical Field] The present invention relates to a method for extending the antistatic ability of an antistatic film, and more particularly to a transparent antistatic property of an antistatic film suitable for use in an electronic packaging material. The method and the transparent antistatic film produced by the method. [Prior Art] The most widely used material for forming an antistatic layer is PED〇T:PSS solution, which is transmitted through poly(3,4-extended ethylene dioxin) [p〇iy (3,4·). Ethylenedioxythiophene), which is obtained by adding poly(styrenesulfonate), which is pss as described above, to PEDOT. However, when the antistatic layer made of PED0T:PSS solution was actually used, it was found that PEDOT was easily degraded by the influence of ultraviolet light, oxygen and heat in the environment, resulting in weakened antistatic performance of PEDOT. It also shortens the life cycle of the antistatic layer. In order to solve the above problems, the current method of increasing the thickness of the antistatic layer is mainly used to slow down the decay rate of the antistatic performance, but this method will increase the cost and further reduce the competitiveness of the product. US 7,087,351 discloses an electronically controlled display comprising at least one substrate, at least one electrically modulated imaging layer disposed on the substrate, at least one electrically conductive layer, and at least one antistatic layer. The antistatic layer may use PEDOT:PSS (trade name "Baytron"), and the conductive layer may be divided into a main conductive layer and a second conductive layer, and the second conductive layer contains indium-tin-composite oxide (indium-tin-composite oxide, ITO), zinc oxide or oxides such as 201219467 cerium oxide. The conductive layers provide only electrical conductivity and do not interact with the antistatic layer and do not contribute to the lifetime of the electrostatic layer. Such displays are packaged after production, so the antistatic layer is encapsulated in the package. In this case, the antistatic layer is completely isolated from the outside world and is not affected by the aforementioned environmental factors, so that the problem of attenuation of the antistatic property is not caused. US 6,921,576 discloses an antistatic coating composition for forming an antistatic film having better hardness and abrasion resistance. The antistatic coating composition comprises (A) a plurality of inorganic oxide particles having side chains; (B) an antistatic agent containing at least one selected from the group consisting of π-containing ammonium salts A knives, a hydrolysis condensate comprising a quaternary salt of a four-stage salt and a hydrazine coupling agent, and (C) a polyfunctional (meth) acrylate having at least three (meth) acrylonitrile groups. This patent mainly uses special modified inorganic oxide particles to improve the hardness and wear resistance of the antistatic film, and the specific antistatic agent can be used to improve the antistatic property of the antistatic film. It can be seen from the above that the composition of this patent requires additional time to prepare specific modified inorganic particles and antistatic agents in addition to the specific materials, and the subsequent application of the composition of the patent to a plastic substrate. The thickness range to be applied needs to be controlled at 1 to 50 μm. For the overall process and subsequent applications, the steps are too complicated and cannot save manufacturing costs. Moreover, the technique disclosed in this patent does not address any possibility of extending the use of the antistatic coating composition. From the above, it has been known that the development of antistatic films has been focused on the antistatic properties, hardness, and abrasion resistance of antistatic films, and has not been discussed on how to extend the antistatic ability of antistatic films. In particular, 201219467 is used as an antistatic film for electronic packaging materials. Because electronic components are susceptible to static electricity and affect the performance or even damage, electronic packaging materials are expected to be long-term in addition to transparency and good mechanical properties. Maintain antistatic ability. Therefore, 'how to make the antistatic film transparent and maintain antistatic ability for a long time' has yet to be developed, and the method of reducing the cost of producing raw materials can be improved to enhance the application field and competitiveness of the product. SUMMARY OF THE INVENTION In order to solve the problem that the antistatic ability of the conventional electronic packaging material cannot be maintained for a long time 'at the same time, the transparency and the manufacturing cost of the packaging material are taken into consideration'. The inventor of the present invention developed an effective improvement after the multi-party test. In the process of preparing an antistatic layer, a specific proportion of the modifier is mixed in the antistatic coating liquid, so that the prepared antistatic film can maintain transparency and can be long. The time is maintained to meet the required surface impedance, that is, to maintain antistatic ability for a long time. Accordingly, it is an object of the present invention to provide a method of extending the antistatic ability of a transparent antistatic film. The method of the present invention does not need to increase the thickness of the antistatic layer. The antistatic property of the antistatic film can be effectively extended by using a simple process and low cost. Therefore, in the method for extending the antistatic ability of the transparent antistatic film of the present invention, the transparent antistatic film has a substrate and an antistatic layer, and the method comprises: applying a layer of the antistatic layer to the substrate An antistatic composition and a solvent coating solution are formed by removing the solvent in the coating liquid. The antistatic composition comprises a -conducting oxime molecule component and a plurality of gasification granules. The content of the oxidized granules 201219467 is in the range of wt%, and the cerium oxide particles have a particle size ranging from 10 to 190 nm, and the antistatic layer has a median weight of the antistatic composition of 100% by weight. The surface impedance at a thickness of 1〇5 to 1〇9〇 is 0.18 to 0.5 Å, and the antistatic film has a haze of not more than 2%. Another object of the present invention is to provide a transparent antistatic film. The transparent antistatic film of the present invention has a haze of not more than 2%, and a surface resistance of 10 to 10 Ω, and comprises a substrate and an antistatic layer disposed on the substrate. The antistatic layer has a thickness of 〇18~〇5 _ and is composed of an antistatic composition comprising a conductive polymer component and a plurality of particle diameters ranging from 1 〇 to 19 〇 nm. Oxide particles. The content of the cerium oxide particles is in the range of 1 to 1 〇 wt% based on 100% by weight of the total weight of the antistatic composition. After many experiments by the inventor of the present invention, it is only necessary to mix the cerium oxide particles in the conventional conductive and knife coating liquid, and to control the cerium oxide particles to conduct electricity by controlling the amount and particle diameter of the cerium oxide particles. The role of the polymer coating liquid enables the antistatic film to be made into an antistatic film even under the influence of ultraviolet light and oxygen, etc., in the case where the thickness of the antistatic layer is lower than 丨pm and the manufacturing cost is low. It can still effectively extend the service life of the antistatic film by more than 2 times while maintaining the existing transparency. When the transparent antistatic film of the present invention is provided for a longer period of antistatic property, the service life of the transparent antistatic film of the present invention can be prolonged to avoid the influence of static electricity on the electronic component. [Embodiment] The method for extending the antistatic property of the transparent antistatic film of the present invention is to pass the antistatic layer of the transparent antistatic film of 201219467 through coating a coating containing an antistatic composition and a solvent on the substrate. The cloth liquid is formed by removing the solvent in the coating liquid. The antistatic composition comprises a conductive polymer component and a plurality of cerium oxide particles. The cerium oxide particles are contained in an amount ranging from 1 to 10% by weight based on the total weight of the antistatic composition of 1 〇〇 Wt%, and the cerium oxide particles have a particle diameter ranging from 1 Å to 190 nm. The antistatic layer has a surface resistance of between 1 〇 5 〜 ι 〇 9 ω, and the thickness of the antistatic layer is 〇 18 〇 5 ^ claws. The transparent antistatic film has a haze of not more than 2%.
較佳地’該抗靜電層的厚度為0.2〜0.3 μηι。 該等氧化鈽粒子的含量範圍為wt%，較佳地為3 〜8 wt%，更佳地為3 5〜7 wt%。當該等氧化㈣子的含量 少於1 wt%時，無法有效延長抗靜電能力至6〇天以上，以 致改善效果有限；反之’當該等氧化鈽粒子的含量多於1〇 wt%時，會增加不必要的製造成本支出。 該等氧化鈽粒子之粒徑範圍$ 1G〜19()咖，較佳地為 2〇〜5〇⑽。當該等氧化鈽粒子之粒徑小於1〇⑽時，容易 產生團聚現象且無法均勾分散㈣題；#該等氧化筛粒子 之粒控大於190 nm時1使抗靜電狀透日讀下降。於本 發明之實施例中’該等氧化飾粒子之粒徑為⑽。 該導電高分子組份可依據欲形成之抗靜電層的性質選 用適合的習知導電高分子的種類，於本發 限制。較佳地，兮遂φ古y '…、特別的 制較佳地㈣電高分子組份包含聚嗟 如但不限於聚（3,4_伸乙基二氧n塞吩）。為賦予抗 好的導電性’-般較適宜之導電高分子之數量平均分子量 201219467 範圍較佳為5,000〜50,000。 該塗佈液之溶劑可選用與氧化鈽粒子及導電高分子組 份相容之溶劑，於本發明中並無特別的限制。較佳地該 溶劑是選自於水、甲醇、乙醇、異丙醇或此等之一組合。 於本發明之實施例中，用於與導電高分子組份混合並形成 一導電高分子溶液之溶劑為異丙醇，以及氧化鈽粒子是與 水混合並形成一氧化飾水溶液。 較佳地’該塗佈液更包含一分散劑及一黏結劑 。該分散劑包含但不限於聚苯乙烯磺酸酯 ⑽购代⑽祕遞’帛稱⑽卜該黏結劑包含但不限於 聚氧醋（Polyurethane，PU)黏結劑。 .本發明之塗佈液的製備可運用—般混合方法進行，例 如：分別利用溶劑，將塗佈液中所含之抗靜電組成物的導 電尚分子組份及氧㈣粒子調配成溶液態，如導電高分子 :液及氧化飾水溶液，再將上述兩溶液進行混合便可製 得塗佈液。 發明之方法_ ’該塗佈液的塗佈方式可選用任柯 支術進行你J如手塗、滾輪塗佈、喷灑塗 =等塗佈方式。去除塗佈液之溶劑的方法亦可採用一 身又乾燥或固化方法進行。 f月透明抗靜電膜具有不高於2%之霧度及一介於 之二？之表面阻抗，且包含一基材及-設置於該基材上 ^靜電層。該抗靜電層是由„抗靜電組成物所構成，該 抗靜電層的厚度為G.18〜G.5_，較佳為〇2〜〇3_。 201219467 在本發明之透明抗靜電膜中，該抗靜電層的態樣及各 種變化是如上所述，在此不多加贅述。 該基材於本發明中並無特別限制，可運用任何現有的 基材’例如聚對苯二甲酸乙二酯（pET)、聚乙烯（PE)、聚氯 乙烯（PVC)、聚丙烯（PP)、聚碳酸酯（PC)、聚苯乙烯（PS) 等。 本發明透明抗靜電膜主要是用作為後續可用於靜電防 護電子包裝材料。 # 本發明將就以下實施例來作進一步說明，但應瞭解的 是’該實施例僅為例示說明之用，而不應被解釋為本發明 實施之限制。 <實施例1及2> 配製抗靜雷涂佈谛 取一導電高分子溶液（購自於H.C. Starck，型號：PVA) 與一氧化鈽水溶液（型號：BYK-3810，粒徑20 μιη)。該導 電高分子溶液含有0.5 wt%的PEDOT:PSS、5 wt%的聚氧g旨 • 黏結劑、94.5 wt%的異丙醇水溶液。該氧化鈽水溶液含有 40 wt%的氧化鈽粒子及60 wt%的水。於40°C以下將上述 兩溶液均勻混合，以配製成一抗靜電塗佈液。實施例1及 2之抗靜電塗佈液的成分比例詳述於表一。 製備抗靜雷雎 將該抗靜電塗佈液塗佈於一 PET基材上，再以熱風乾 燥的方式移除塗佈液中的溶劑（水及異丙醇）。烘乾溫度為65 〜70°C之間，時間為15〜30秒，以於該基材上形成一由— 201219467 抗靜電組成物[含有PEDOT:PSS(導電高分子組份）及氧化鈽 粒子]所構成的抗靜電層，進而分別製得一抗靜電膜。最 後’分別對實施例1及2之抗靜電層的厚度進行量測，以 及對構成抗靜電層之抗靜電組成物所含的導電高分子組份 及氧化鈽粒子的含量進行計算，並記錄於表一。 性晳測Μ 1. 表面阻抗：利用表面阻抗測試儀器[為表面電阻儀 (Wolfgang Warmbier;SRM-110)，量測標準方法為 ASTM-D257] ’對實施例1及2的抗靜電膜的抗靜電層 進行測試’所得結果如下表一所示。用於電子包裝材 料之表面阻抗值建議在1〇5〜1〇9Ω。 2· 霧度：利用霧度計[Hazy meter，型號為NDH 2000，購 自曰本NIPPON DENSHOKU公司，量測標準方法為 ASTM-D1003] ’對實施例1及2的抗靜電膜的抗靜電 層進行測試，所得結果如下表一所示。目前業界可接 受之霧度值為< 5%。 3.使用哥命.將所製得之實施例1及2的抗靜電膜置於 一般大氣環境下’使之曝露於一般大氣環境下，利用 表面電阻儀定期量測抗靜電層的表面阻抗，並紀錄抗 靜電層之表面阻抗衣退至l〇1GD的天數，此一天數即為 該抗靜電膜之使用壽命。所得結果如下表一所示。使 用奇命天數越長為越佳。 <比較例1〜6> 比較例1〜6的製備過程、製備條件及測試過程與前述 10 201219467 之貫施例2相同’不同之處在於：於比較例丨〜〗中，將氧 化鈽粒子改為其他紫外光吸收劑，其中，比較例1選用氧 化鋅（裂號.BYK-3820，粒徑為20 nm)，比較例2選用碳 黑’比較例3選用有機化合物（購自於永光公司，商品名： Eversorb80);在比較例4及5中，未使用氧化鈽粒子且抗 靜電塗佈液是由上述之導電高分子溶液所組成；比較例6 的抗靜電層厚度小於0· 1 8 μιη。比較例1〜6之組成、厚度及 測試結果詳述於表一。 表一 構成該抗靜電層之抗靜電組成物的 成分 抗靜電 層厚度 (μιη) 抗靜 電層 表面 阻抗 (Ω) 抗靜 電膜 霧度 (%) 使用 壽命 (天） PEDOT:PSS 的 含量(wt%)a 氧化鈽或紫外光吸 收劑/含量(wt%)a 實施例1 96.47 氧化鈽/3.53 0.20 106 1.1 >60 實施例2 93.16 氧化鈽/6.84 0.21 106 1,1 >60 比較例1 93.16 氧化鋅/6.84 0.20 106 3.8 >60 比較例2 93.16 碳黑/6.84 0.21 106 5 4 45 比較例3」 93.16 有機化合物/6.84 0.21 1010 1.4 0 比較例4 100 益 0.20 106 11 35 比較例5 100 益 0.80 105 7 5 >60 比較例6 90 氧化鈽/10 0.16 106 1.2 47 a.含量是以抗靜電組成物的總重為1 〇〇 wt。/❶計算。 由表-的結果可知’在不添加紫外光吸收劑的情況 下’比較例4之抗靜電層厚度為〇.2〇㈣，貝抗靜電能力僅 11 201219467 能維持35天。在比較例5中’雖然在未添加紫外光吸收劑 下抗靜電此力可維持60天以上，但塗佈厚度需高達請 _，將使得成本大幅增加，而且霧度亦>2%，並不符合電 子包裝之需求。 比較例3所添加之有機化合物會讓該導電高分子溶液 的抗靜電性大幅下降。比較例i、2之表面阻抗皆在 1〇5〜109Ω範圍内且抗靜電能力可維持6G天以上，但所製成 的抗靜電膜的透明度不佳。由上述比較例卜3的結果可 知，並非所有紫外光吸收劑皆可讓抗靜電膜具備透明性且 可長時間維持抗靜電能力。 比較例6的抗靜電層厚度為〇丨6 μπι，即使加入1 之氧化飾粒子，使用壽命低於60 A，證明抗靜電層的厚度 也會影響抗靜電膜的使用壽命。 實施例1及2之抗靜電膜均具有介於1〇5〜1〇9Ω之表面 阻抗，1.1%的霧度，外觀呈透明，且使用壽命可持續6〇天 以上，證明本發明之延長透明抗靜電膜之抗靜電能力的方 法，確實可以製得延長抗靜電能力且兼具透明度的抗靜電 膜。 絲上所述，本發明之延長透明抗靜電膜之抗靜電能力 的方法’藉由選用氧化鈽粒子並控制其用量（1〜10 wt%)與 粒經（10〜190 nm)，並適當控制抗靜電層的厚度（〇 18〜〇 5 μιη) ’讓所製得的透明抗靜電膜在接觸氧氣及紫外光的環境 下’可維持其表面阻抗達60天以上，因此能有效地延長抗 靜電膜的抗靜電能力。 12 201219467Preferably, the antistatic layer has a thickness of 0.2 to 0.3 μm. The content of the cerium oxide particles is in the range of wt%, preferably 3 to 8 wt%, more preferably 3 5 to 7 wt%. When the content of the oxidized (tetra) is less than 1 wt%, the antistatic ability cannot be effectively extended to more than 6 days, so that the improvement effect is limited; otherwise, when the content of the cerium oxide particles is more than 1% by weight, Will increase unnecessary manufacturing costs. The cerium oxide particles have a particle size ranging from $1 G to 19 () coffee, preferably from 2 Å to 5 Å (10). When the particle size of the cerium oxide particles is less than 1 〇 (10), agglomeration is likely to occur and it is impossible to uniformly disperse (4); # When the granules of the oxidized sieve particles are larger than 190 nm, the antistatic form is reduced. In the examples of the present invention, the particle diameter of the oxidized particles is (10). The conductive polymer component can be selected according to the nature of the conventional antistatic layer to be formed, and is limited in the present invention. Preferably, 兮遂φ古y'..., particularly preferably, the (iv) electropolymer component comprises poly(, but not limited to, poly(3,4_ethylidene oxide). The number average molecular weight of the conductive polymer which is preferably suitable for imparting good electrical conductivity is preferably 5,000 to 50,000 in the range of 201219467. The solvent of the coating liquid may be selected from solvents compatible with the cerium oxide particles and the conductive polymer component, and is not particularly limited in the present invention. Preferably the solvent is selected from the group consisting of water, methanol, ethanol, isopropanol or a combination of these. In the embodiment of the present invention, the solvent for mixing with the conductive polymer component and forming a conductive polymer solution is isopropyl alcohol, and the cerium oxide particles are mixed with water to form an aqueous oxidizing solution. Preferably, the coating liquid further comprises a dispersing agent and a binder. The dispersant includes, but is not limited to, polystyrene sulfonate (10). (10) Secret nickname (10) The binder includes, but is not limited to, a polyurethane (PU) binder. The preparation of the coating liquid of the present invention can be carried out by a general mixing method, for example, by using a solvent, the conductive molecular component and the oxygen (tetra) particle of the antistatic composition contained in the coating liquid are formulated into a solution state. For example, a conductive polymer: a liquid and an aqueous oxide solution, and then mixing the above two solutions to obtain a coating liquid. The method of the invention _ ' The coating method of the coating liquid can be carried out by using a technique such as hand coating, roller coating, spray coating or the like. The method of removing the solvent of the coating liquid can also be carried out by a dry or solid method. The f-month transparent antistatic film has a haze of no more than 2% and a difference between the two? The surface impedance comprises a substrate and is disposed on the substrate. The antistatic layer is composed of „antistatic composition, and the antistatic layer has a thickness of G.18~G.5_, preferably 〇2~〇3_. 201219467 In the transparent antistatic film of the invention, the The aspect and various changes of the antistatic layer are as described above and will not be further described herein. The substrate is not particularly limited in the present invention, and any existing substrate such as polyethylene terephthalate can be used. pET), polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), polycarbonate (PC), polystyrene (PS), etc. The transparent antistatic film of the present invention is mainly used as a follow-up The present invention will be further described with reference to the following embodiments, but it should be understood that the embodiment is for illustrative purposes only and should not be construed as limiting the implementation of the invention. Examples 1 and 2> A static conductive coating solution (purchased from HC Starck, model: PVA) and an aqueous solution of cerium oxide (Model: BYK-3810, particle size 20 μιη) were prepared. The molecular solution contains 0.5 wt% PEDOT:PSS, 5 wt% polyoxygen g. a binder, 94.5 wt% aqueous solution of isopropyl alcohol. The cerium oxide aqueous solution contains 40 wt% of cerium oxide particles and 60 wt% of water. The above two solutions are uniformly mixed at 40 ° C or lower to prepare an antistatic agent. The coating liquid. The composition ratios of the antistatic coating liquids of Examples 1 and 2 are detailed in Table 1. Preparation of antistatic static sputum The antistatic coating liquid was applied onto a PET substrate and dried by hot air. The solvent (water and isopropyl alcohol) in the coating solution is removed. The drying temperature is between 65 and 70 ° C for 15 to 30 seconds to form an antistatic composition on the substrate. An antistatic layer composed of PEDOT:PSS (conductive polymer component) and cerium oxide particles was prepared, and an antistatic film was separately prepared. Finally, the thicknesses of the antistatic layers of Examples 1 and 2 were respectively performed. The measurement, and the content of the conductive polymer component and the cerium oxide particles contained in the antistatic composition constituting the antistatic layer were calculated and recorded in Table 1. Sex Measurement Μ 1. Surface Impedance: Using Surface Impedance Test Instrument [for surface resistance meter (Wolfgang Warmbier; SRM-110), measurement standard The method is ASTM-D257] 'Testing the antistatic layer of the antistatic film of Examples 1 and 2'. The results obtained are shown in Table 1. The surface resistance value for the electronic packaging material is recommended to be 1〇5~1〇9Ω. 2· Haze: Using a haze meter [Hazy meter, model NDH 2000, purchased from Nippon NIPPON DENSHOKU, measuring standard method is ASTM-D1003] 'Antistatic film antistatic for Examples 1 and 2 The layers were tested and the results are shown in Table 1 below. The currently acceptable haze value in the industry is < 5%. 3. Using the life of the anti-static film of the examples 1 and 2 prepared in the general atmosphere to expose it to the general atmosphere, the surface resistance of the antistatic layer is periodically measured by a surface resistance meter. And record the number of days when the surface impedance of the antistatic layer is retracted to l〇1GD, which is the service life of the antistatic film. The results obtained are shown in Table 1 below. The longer you use the odd number of days, the better. <Comparative Examples 1 to 6> The preparation processes, preparation conditions, and test procedures of Comparative Examples 1 to 6 were the same as those of the above-mentioned 10, 201219467, Example 2, except that in the comparative example, the cerium oxide particles were used. It was changed to other ultraviolet light absorbers. Among them, Comparative Example 1 used zinc oxide (split number. BYK-3820, particle size was 20 nm), and Comparative Example 2 used carbon black. Comparative Example 3 used organic compounds (purchased from Yongguang Company). , trade name: Eversorb 80); in Comparative Examples 4 and 5, cerium oxide particles were not used and the antistatic coating liquid was composed of the above-mentioned conductive polymer solution; the antistatic layer thickness of Comparative Example 6 was less than 0·1 8 Ιιη. The compositions, thicknesses and test results of Comparative Examples 1 to 6 are detailed in Table 1. Table 1 Composition of the antistatic composition of the antistatic layer. Antistatic layer thickness (μιη) Antistatic layer surface resistance (Ω) Antistatic film haze (%) Service life (days) PEDOT: PSS content (wt% a) Cerium oxide or ultraviolet light absorber/content (wt%) a Example 1 96.47 Yttrium oxide/3.53 0.20 106 1.1 > 60 Example 2 93.16 Yttrium oxide/6.84 0.21 106 1,1 > 60 Comparative Example 1 93.16 Zinc Oxide/6.84 0.20 106 3.8 > 60 Comparative Example 2 93.16 Carbon Black/6.84 0.21 106 5 4 45 Comparative Example 3" 93.16 Organic Compound / 6.84 0.21 1010 1.4 0 Comparative Example 4 100 Benefit 0.20 106 11 35 Comparative Example 5 100 Benefit 0.80 105 7 5 > 60 Comparative Example 6 90 yttrium oxide/10 0.16 106 1.2 47 a. The content is 1 〇〇wt based on the total weight of the antistatic composition. /❶ calculation. From the results of Table-, it can be seen that 'without the addition of the ultraviolet light absorber', the antistatic layer thickness of Comparative Example 4 is 〇.2〇(4), and the antistatic ability of the shell is only 11 201219467 can be maintained for 35 days. In Comparative Example 5, although the antistatic force can be maintained for more than 60 days without the addition of the ultraviolet light absorber, the coating thickness needs to be as high as possible, which will result in a substantial increase in cost and a haze of > 2%. Does not meet the needs of electronic packaging. The organic compound added in Comparative Example 3 greatly deteriorates the antistatic property of the conductive polymer solution. The surface impedances of Comparative Examples i and 2 were all in the range of 1 〇 5 to 109 Ω and the antistatic ability was maintained for more than 6 G days, but the transparency of the resulting antistatic film was not good. From the results of the above Comparative Example 3, it is understood that not all of the ultraviolet light absorbers can provide the antistatic film with transparency and can maintain the antistatic ability for a long period of time. The antistatic layer of Comparative Example 6 had a thickness of 〇丨6 μm, and even if the oxidized particles of 1 were added, the service life was less than 60 A, which proved that the thickness of the antistatic layer affected the service life of the antistatic film. The antistatic films of Examples 1 and 2 each have a surface impedance of 1〇5~1〇9Ω, a haze of 1.1%, a transparent appearance, and a service life of more than 6 days, which proves that the invention is extended and transparent. The antistatic ability of the antistatic film can indeed produce an antistatic film which has an antistatic property and a transparency. As described above, the method for extending the antistatic property of the transparent antistatic film of the present invention is controlled by using cerium oxide particles and controlling the amount thereof (1 to 10 wt%) and the granules (10 to 190 nm). The thickness of the antistatic layer (〇18~〇5 μιη) 'Let the prepared transparent antistatic film maintain its surface resistance for more than 60 days in the environment of contact with oxygen and ultraviolet light, thus effectively prolonging the antistatic The antistatic ability of the film. 12 201219467
惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 無 13 201219467 【主要元件符號說明】The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are all It is still within the scope of the invention patent. [Simple description of the diagram] None 13 201219467 [Description of main component symbols]