201022016 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種可成型之雙軸延伸聚酯薄膜及 其製造方法，尤指一種在熱成型製程後具有優良成型性質 之雙軸延伸聚酯薄膜及其製造方法。 【先前技術】 聚酯薄膜（Polyester Film)係為一種優良的塑膠薄 膜，在應用上可作為電腦周邊材料，如鍵盤、面板保護膜、 面板背光膜組之電子絕緣材料等用途，並適合用於電腦磁 帶等磁性基材；另一方面聚酯薄膜更可應用於食品包裝、 鍍金屬薄膜、電氣絕緣材、文具或其他多種民生及工業用 途。 〆、 般而言， 取_溥膜具有非常優秀的材料特性，例 如丄其伸張力強及耐衝擊力優異、具有高熔點，可應用於 較高的溫度範圍，故聚酯薄膜可適用於保護材料或基板材 料的範疇。再者，聚酯薄膜的透明度高、富光澤，2其表 面光滑而可大量應用於標籤、貼合或印刷等用途：聚㈣ 膜更有良好耐_性，可用為絕緣材料，如電線被覆、曰絕 緣膠帶、馬達或電容料元件；尤其㈣薄溶 於有機溶劑，具有非常好的耐酸及耐油特性。 、/ 在1953年，雙軸向拉伸聚酯薄膜的工業 =發且成功的應用在各種領域。雙向拉伸聚：： 皿ial oriented p〇lyester film，_τ)具有優良 6 201022016 的物理和化學特性，在電子、電器、磁記錄、包裝、製版 印刷和感光材料等方面均具有相當廣泛的用途。 雙軸向拉伸聚酯薄膜目前成為各種高性能應用的主 要包裝材料，更高階的產品也已廣泛的應用於平面顯示器 (PFD)如於背光模組的增亮光學膜基材、偏光板用的光學 級保護膜與離形膜、觸控面板的IT0基材等等；然而習知 的雙軸延伸聚酯薄膜由於其應用上皆要求極佳的尺寸安 定性；通常在150°C熱處理30分鐘後熱收縮率要小於1%， ❹ ΙΤ0基材更要求小於0. 3%，因此在延伸製程上通常會將聚 酯薄膜延伸至極限後再作高於200°C的熱處理，使其雙軸 延伸聚酯薄膜的熱收縮性降至最小，但如此雙軸延伸製程 後的聚酯薄膜其再延伸性極差所以成型性不佳，且其具有 遇熱會產生回復（rev i ve)的缺點。由於目前聚酯薄膜用 於模内裝飾其製程必須先進行油墨印刷後90°C烘烤至少 5〜8道製程；為了使原先設計圖案保持完整性，其雙軸延 伸聚酯薄膜在機械轴方向（MD)與橫轴方向（TD)的熱收 ® 縮率的差異性不能太大，但目前所生產的聚酯薄膜熱收縮 性差異太大造成最終成型態樣有相當明顯的尺寸變異 - 量，故導致成型製程的品質無法提升。 緣是，本發明人有感上述缺失之可改善，提出一種設 計合理且有效改善上述缺失之本發明。 【發明内容】 本發明之主要目的，在於提供一種可成型之雙轴延伸 7 201022016 膜及其製造方法’以使該雙軸延伸聚酯薄膜具 土、、型性且提升成型製程之品質及穩定度。、、父 達成上述之目的’本發明係提供—種可成型之雔 軸伸聚酉旨薄膜之製造方法，包括以下步驟：步赞又 未延伸之聚合物薄膜，·步驟二：將該未料 軸延仲薄臈，·步:二=伸：ί:預定倍率’形成單 ❿ 魯 在橫向延伸成雙軸延伸薄膜，·且 、_方向形成-弓形的溫度分布，藉此生成弓 伸薄料h5%;步驟四：將該雙轴延 ’、仃一…、處理步驟，而得到MD與TD在9(TrR f全 的熱收縮率差小於3肩，且再延伸性大於 成= 之雙軸延伸聚酯薄膜。 饴之了成型 本發明具有以下有益的效果：本發明提出 藉此紅外線加熱器分布於橫幅寬;向，· ^ °°° ―;形的溫度分佈使得抑f!l橫向延伸 :==ibrngregi°n)，進而㈣^ 勺1·生，特別疋本發明為用於模具成型的加工製程； =在^前㈣上所設計0_，此印刷至少為5〜8道製 it 去的㈣在多道烘烤後仍能保持圖案的 d在由延伸聚酿薄膜的熱縮均—性格外嚴 羞即在機械軸方向⑽與橫軸方向（TD)必須 近的熱縮性，以大幅提升整體品質穩定性。、 為使能更進-步瞭解本發明之特徵及技術内容，請參 8 201022016 供灸發明之詳細說明與附圖’然而所附圖式僅提 “考與㈣用，並非絲對本發明加以限制者。 【實施方式】 >考第圖，本發明係提供一種可成型之錐—a# _膜的製造方法，該製造方法所 相具有相當優良的成型性，同時μ" _ ❹ 質十分的均勻，亦,…寻錢§曰溥膜的熱性 p省聚知溥犋在熱成型時的尺寸異向性 ，的小，故非常適合於熱成型等製程。上述之製造方法 包括如下步驟： 方去 入札t驟一：提供一未延伸之聚合物薄膜。-般而言，〒 合物薄膜可為經由縮聚反應所得到的原料顆粒，再終由^ :二融將擠出及鎿片等步驟加以製成。然而可根據心 =用^^同的單體及共聚成分進行聚合反應以製造聚 二原枓，例如將聚氧化乙烯對二笨 (P〇iyethyieneterephthalate)與一 原料，而上述的共聚成分輸== :一甲馱或已一酸，酯類’如萘基甲基酯；醇類，如二乙 烯乙=醇、聚乙烯乙二醇等；又如苯二甲酸二甲醋（謝） 或對本一甲酸（ΡΤΑ)和i，3， 得的聚合物，但上述組成僅為說明之 廿非田而 發明。換句話說，本發明所提出的製造方法可適= =合物薄膜’並將其製成具有高成型性的雙軸延伸 201022016 步驟二：將該未延伸之聚合物薄膜在機械 (machine direction，MD)縱延伸第一預定倍率，、向 薄膜。在此步驟中係將上述之聚合薄膜:: 機械軸方向（MD)的延伸，亦即為平行於薄膜 ^仃 延伸，其中該第一預定倍率係介於2.5至4. 〇倍之間°。的 步驟二：將步驟二之單軸延伸薄膜在橫軸方 (加娜⑽directi()n，TD)橫延伸第二預定倍率，二 蠱成雙轴延伸薄膜。此步驟中即是將已形成的單軸延腔 在橫軸方向上進行拉伸，亦即為垂直於薄膜行進方向的延 伸其中上述之第二預定倍率係介於3· 〇至5. 〇倍之間， 且延伸區末端設-紅外線加熱器，以在橫幅寬方向形成— 弓形的溫度分布狀態，使該_之幅寬中與兩末端區 的’皿度差於5至50。。；即兩末端區之溫度高於中心區之、w 度為5至5〇。(： ’藉此可以抑制並控制在橫軸方向進行拉ς 時所產生的弓形區（bowing regi〇n)，以使所生產的雙軸 ❿延伸聚酯薄膜具有相當優良的均一物性；而在步驟二及步 驟三完成之後，即可形成雙軸向延伸的聚酯薄膜。 〆 接著步驟四：將該雙軸延伸聚酯薄膜進行一熱處理步 驟。此熱處理步驟係提供高溫18〇至24(rc ;熱處理時^ 3至、1〇，，讓上述的雙軸延伸聚酯薄膜產生結晶化的結 構’消除薄膜的内應力以減小薄膜的熱收縮率進而提高其 尺寸安定性。 正然而，在步驟二之後（即將聚合物薄膜在MD方向上 延伸之後），或步驟四之後（即將聚合物薄膜進行雙向軸 10 201022016 延伸之後）更進—步台 秦s應），該步=；；括入—/命佈步驟（㈣‘咖⑽ 佈於該薄膜上，藉由M3延t機氧化物的水溶液塗料塗 :伸此塗層經橫向㈣後厚度小於lUra。此一步驟 = ί雙轴延伸聚醋薄膜的塗佈液的接著性，例 伸聚醋薄膜的加工性^月匕之塗怖液，進而提高雙軸延 而在上述的製程步驟之後，本發明可以得到一種具有 同又成型特性的雙軸延伸聚酯薄膜，其特徵在於·· 卜該雙軸延伸聚酯薄膜在兩個方向±的熱縮性相當 接近’使得該雙軸延伸聚醋薄膜在經過熱成型步驟， 溫两壓的射出成型後’在兩個方向上的尺寸不會產生太大 的變異’換句話說’當該雙轴延伸聚醋薄膜在射出成型 後，在機械軸方向與橫軸方向具有相當接近的尺寸；此 外，該雙軸延伸聚醋薄膜具有1>7倍以上的再延伸性如 此即可大幅提高該雙軸延伸聚酯薄膜的可成型性質。該雙 轴延伸聚酯薄膜在全幅寬方向的折射率差於〇 〇 1至〇 1 之間，如此可減少後續塗佈硬度層所產生的干涉彩色紋·，201022016 IX. Description of the Invention: [Technical Field] The present invention relates to a moldable biaxially stretched polyester film and a method for producing the same, and more particularly to a biaxially stretched polymer having excellent molding properties after a thermoforming process Ester film and its method of manufacture. [Prior Art] Polyester Film is an excellent plastic film that can be used as a computer peripheral material such as a keyboard, a panel protective film, an electronic insulating material for a panel backlight film group, and the like. Magnetic substrates such as computer tapes; on the other hand, polyester films can be used in food packaging, metallized films, electrical insulation materials, stationery or other various domestic and industrial applications. 〆 In general, 溥 film has excellent material properties, such as excellent tensile strength and impact resistance, high melting point, and can be applied to a higher temperature range, so polyester film can be used for protection. The category of material or substrate material. Furthermore, the polyester film has high transparency and luster, and its surface is smooth and can be used in a large number of applications such as labeling, lamination or printing: the poly(iv) film is more resistant to styrene and can be used as an insulating material such as a wire covering.曰Insulating tape, motor or capacitor material; especially (4) thin and soluble in organic solvents, with very good acid and oil resistance. / In 1953, the industry of biaxially stretched polyester film was successfully applied in various fields. Biaxially oriented poly:: ial oriented p〇lyester film, _τ) has excellent physical and chemical properties of 201022016, and has a wide range of applications in electronics, electrical appliances, magnetic recording, packaging, plate-making and photosensitive materials. Biaxially stretched polyester film is currently the main packaging material for various high performance applications. Higher order products have also been widely used in flat panel displays (PFD), such as brightening optical film substrates for backlight modules, and polarizing plates. Optical grade protective film and release film, IT0 substrate of touch panel, etc.; however, the conventional biaxially stretched polyester film requires excellent dimensional stability due to its application; usually heat treatment at 150 ° C 30 After the minute, the heat shrinkage rate is less than 1%, and the ❹ ΙΤ0 substrate is required to be less than 0.3%. Therefore, in the extension process, the polyester film is usually extended to the limit and then heat treated at a temperature higher than 200 ° C to make it double. The heat shrinkability of the axially stretched polyester film is minimized, but the polyester film after the biaxially stretched process is extremely poor in re-expansion, so the moldability is poor, and it has a heat recovery (rev i ve). Disadvantages. Since the polyester film is currently used for in-mold decoration, the process must be followed by ink printing at 90 ° C for at least 5 to 8 processes; in order to maintain the integrity of the original design pattern, the biaxially stretched polyester film is in the mechanical axis direction. The difference between the (MD) and the horizontal axis direction (TD) is not too large, but the difference in heat shrinkage of the polyester film currently produced is too large, resulting in considerable dimensional variation in the final molded form - The quantity, so the quality of the molding process cannot be improved. The reason is that the inventors have felt that the above-mentioned deficiency can be improved, and proposes a present invention which is rational in design and effective in improving the above-mentioned deficiency. SUMMARY OF THE INVENTION The main object of the present invention is to provide a moldable biaxial extension 7 201022016 film and a manufacturing method thereof to make the biaxially stretched polyester film have soil, shape and improve the quality and stability of the molding process. degree. The present invention achieves the above-mentioned purpose. The present invention provides a method for manufacturing a moldable yoke-stretching film, comprising the following steps: a stepped and unstretched polymer film, and a second step: Axial 仲 臈 臈, · Step: two = stretch: ί: predetermined magnification 'formed single ❿ Lu extended in the transverse direction into a biaxially stretched film, and _ direction formed - bow temperature distribution, thereby generating a bow and thin material H5%; Step 4: The biaxial extension, the first step, and the processing step, and the MD and TD are obtained at 9 (the TrR f total heat shrinkage difference is less than 3 shoulders, and the re-expansion is greater than the two axes of the formation = The polyester film is stretched. The invention has the following beneficial effects: the invention proposes that the infrared heater is distributed over the width of the banner; the temperature distribution of the shape of the shape is such that the f!l lateral extension :==ibrngregi°n), and then (4)^spoon 1·sheng, especially the invention is a processing process for mold forming; = 0_ is designed on the front (4), this printing is at least 5~8 channels. (d) the ability to maintain the pattern d after multiple baking, in the heat shrinkage uniformity of the stretched film Yan outer shame ⑽ i.e. machine direction of the horizontal axis direction (TD) to be near the heat-shrinkable, to substantially improve the overall quality stability. In order to enable further understanding of the features and technical contents of the present invention, please refer to the detailed description and the accompanying drawings of the moxibustion invention of 201022016. However, the drawings only refer to the "test and (4) use, and do not limit the invention. [Embodiment] The present invention provides a method for producing a moldable cone-a# film, which has a relatively excellent formability and a uniform μ" , also, ... find money § heat of the film 省 聚 聚 know the size anisotropy during thermoforming, is very small, it is very suitable for thermoforming and other processes. The above manufacturing method includes the following steps: Step 1: Provide an unstretched polymer film. In general, the film of the compound can be the raw material particles obtained through the polycondensation reaction, and then the steps of extrusion and bucking are carried out by means of: However, the polymerization can be carried out according to the core = using the same monomer and copolymerization component to produce a polydiazine, for example, polyethylene oxide to P〇iyethyieneterephthalate and a raw material, and the above copolymerization component Loss == : One armor Or already acid, esters such as naphthyl methyl ester; alcohols, such as diethylene glycol = alcohol, polyethylene glycol, etc.; or such as dimethyl phthalate (Xie) or the same formic acid (ΡΤΑ) And i, 3, the obtained polymer, but the above composition is invented only for the description of the field. In other words, the manufacturing method proposed by the present invention can be used to form a film with high molding. Biaxial extension 201022016 Step 2: The unstretched polymer film is longitudinally extended at a first predetermined rate in a machine direction (MD) to a film. In this step, the above polymer film is: Mechanical axis The extension of the direction (MD), that is, extending parallel to the film, wherein the first predetermined magnification is between 2.5 and 4. 〇 times. Step 2: uniaxially stretching the film in step two The axial side (Gana (10) directi () n, TD) extends horizontally at a second predetermined magnification, and the second is a biaxially stretched film. In this step, the formed uniaxial extension cavity is stretched in the horizontal axis direction. That is, an extension perpendicular to the traveling direction of the film, wherein the second predetermined ratio is 3· 〇 to 5. 〇 times, and the end of the extension zone is set with an infrared heater to form a bow-shaped temperature distribution in the width direction of the banner, so that the width of the _ width and the difference between the two end regions The temperature between the two end regions is higher than the central region, and the w degree is 5 to 5 〇. (: 'This can suppress and control the arcuate region generated when pulling in the horizontal axis direction ( Bowing regi〇n), so that the produced biaxially-twisted stretched polyester film has a fairly good uniform physical property; and after the completion of the second step and the third step, a biaxially stretched polyester film can be formed. Four: The biaxially stretched polyester film is subjected to a heat treatment step. This heat treatment step provides a high temperature of 18 〇 to 24 (rc; ^3 to 1, 热处理 during heat treatment, allowing the above-mentioned biaxially stretched polyester film to crystallize the structure' to eliminate the internal stress of the film to reduce the heat shrinkage of the film. The rate further increases its dimensional stability. However, after step two (i.e., after the polymer film is extended in the MD direction), or after step four (i.e., after the polymer film is extended by the bidirectional axis 10 201022016), the step is further advanced. Qin s should), the step =;; enclose - / life cloth step ((4) 'Cai (10) cloth on the film, coated with an aqueous solution of M3 extension machine oxide: stretch the thickness of the coating after the transverse (four) Less than lUra. This step = ί the adhesion of the coating liquid of the biaxially stretched polyester film, for example, the processing property of the polyester film, and the coating of the liquid, thereby increasing the biaxial elongation after the above-mentioned process steps According to the present invention, a biaxially stretched polyester film having the same molding characteristics can be obtained, characterized in that the biaxially stretched polyester film has a heat shrinkage in two directions which is relatively close to 'the biaxially stretched poly Vinegar film is hot The forming step, after two-pressure injection molding, does not cause too much variation in the two directions. In other words, when the biaxially stretched polyester film is injection molded, it is in the mechanical axis direction and the horizontal axis. The direction has a relatively close size; in addition, the biaxially stretched polyester film has a re-expansion of more than 7 times, so that the formability of the biaxially stretched polyester film can be greatly improved. The refractive index difference in the full width direction is between 〇〇1 and 〇1, which can reduce the interference color pattern generated by the subsequent coating hardness layer.
且經由進一步之量測後，該聚酯薄臈之薄膜厚度方向之折 射率（Nz )大於1. 50 ;雙軸配向度因子（biaxiai orientation factor)介於0.07與〇.15之間，其配向度 因子定義如方程式1所示： X 方程式1 : 配向度因子（BOFMNX+Ny)/Nz，其中NZ為薄膜厚度 11 201022016 機械軸方向及橫軸方向的 方向之折射率，Νχ與Ny分別為 折射率。 ^亥雙轴延伸聚醋薄膜之弓形區（_加邮⑷ 小於等於1.5%。其中弓形區係以方程式2所計算·· 方程式2 : 弓形區（bowing region) =(b/w)x 1〇〇%， 士主irw為橫軸方向（TD)寬度，β為最大凹陷深度。 °月參第—圖’在該薄膜進行橫軸方向（TD)的延伸時， 會產生-個弓形區（b〇wing regi〇n)，該弓形區（b〇wing ❿ ^ 山 )可由上述的方程式2計算所得，而本製程延伸區 末端設-紅外線加熱器分布於橫幅寬方向形成—弓形的 :皿度77布狀態其幅寬中心區與兩末端區的溫度差於5至5〇 °C ^即兩末端區高於中心區5㈤。c，藉此可以抑制並控制 在橫^方向進行拉伸時所產生的弓形區（bowing region) 的冲π值小於等於15% ’並使該雙軸延伸聚g旨薄膜在通 過橫軸方向的延伸後可以保持與橫軸方向平行的區域，藉 此也使該雙軸延伸聚g旨薄膜具有相當均句的熱性質及酉曰己 向陡（orientation degree )。 、 本發明所製造可成型之雙軸延伸聚酯薄膜的特徵的 檢測方法如下： 熱收縮率：雙軸延伸聚醋膜片裁成MD 200mm*TD 25〇_ 大小，以2D對位儀量測在其尺寸後放置卯^的烘箱，6 小，後取出在量測其尺寸，其中熱收縮率係以方程式3所 計算： 12 201022016 方程式3 : ㈣，烤前尺寸-烘烤後尺寸㈣前尺寸） ^ i6〇〇c(m 伸倍率。4、100仏（膜片熱成型的速率）之最大延 折射率.利用菱鏡搞合儀量測肋與刊折射率。 Φ 成型性.熱成型機以IR加熱板加 …秒進行5至10_高度的模具,成型。至35°C下 替將利f上述之製程以不同的參數製作雙軸延伸 聚酉曰溥膜，並量測該些薄膜的特性。 第一實驗組（EX. 1) 係使用IV = 〇. 62 g/L <聚對苯二τ酸乙二酯 (polyethylene terephthalate，pET)樹脂材料，日 ❹ 上述材料以⑽。C進行五分鐘的乾燥步驟。接著進行 製程，以28(TC進行1100# m的材料壓出，之後以“I， 速度20 m/s的冷卻氣體將壓出樹脂以rc/s的速度進行 冷卻。接著是雙向的延伸步驟：首先係為機械軸方:（肋丁 的縱延伸，其在啊的條件下進行延伸率3. Q倍的機械轴 方向延伸，之後為橫轴方向（TD)的橫延伸，而在橫轴方 向延伸之前先進行95.t下預熱步驟，接下來進行延伸率 3. 5倍的橫軸方向延伸。延伸區紅外線加熱器所產生的弓 形溫度幅寬中心區與兩末端區的溫度差為1{rc ;接著進行 20(TC、六秒鐘的熱處理步驟。 丁 13 201022016 第二實驗組（EX. 2) 第二實驗組係重複第一實驗組之參數及步驟流程，而 第一貫驗組與第—實驗組不同之處在於延伸區紅外線加 熱器所產生的弓形的溫度幅寬中心區與兩末端區的溫度 差為2(TC。 第三實驗組（EX.3) 第三實驗I且係重複第一實驗組之參數及步驟流程，而 第二實驗組與第一實驗組不同之處在於延伸區紅外線加 熱器所產生的弓形的溫度幅寬中心區與兩末端區的溫度 差為5t：。 第四實驗組（EX.4) ❹ 第四驗組係重複第—實驗組之參數及步驟流程，而 第四實驗組與第—實驗組不同之處在於本 用:延伸區紅外線加熱器所產生的溫度差。換句話3 四只驗組係為一對照組，其製程條件係 第 聚醋薄膜的製造流程。 …，之雙轴延伸 弟五貫驗組5) 第五只驗組係重複第一實驗組之表 第五實驗組與第一實驗組步驟流程，而 〇之處在於該機械軸方向 14 201022016 ==倍率改變為3.3倍，而橫轴方向⑽的 杈延伸倍率改變為3. 5倍。 第六實驗組（Εχ· 6) 第係重複第一實驗組之參數及步驟流程，而 的ί延伸;^ 實驗組不同之處在於雜軸方向（TD) 的杈延伸倍率改變為3.0倍。 膜：：二示上述六個實驗組的流程參數及最终薄 油墨印刷製程若完成印刷後其圖案 為佳，相反地印刷後 千面的公差大於1%者則評比為，，差，，。再 未:現破構特徵加以分類’例如在射出成型後並 之間者，成型性角I半徑在〇. 5至1公釐(腿) 子比為佳丨相反地，在 出現破膜現象且成型直角半成1後 成型性則評比為”差，，從===):上者’ 驗組及第五至第六實驗組採用本:方至^二實 到的雙軸延伸聚醋薄膜之成型表現 發明所提出之雙轴延伸聚㈣腺丄的:皿度）為佳’故本 高雙軸延伸聚醋薄膜的成型性，其中幅提 所提出之製造方法之較佳實施態樣= 者’從表—的薄膜特性進行討論，該雙軸延伸㈣薄膜2 15 201022016 全幅兔方向的MD與TD折射率差小於〇. 〇5,而該聚醋薄膜 在90 C、六小時之條件下的熱收縮率小於，且弓形區 經方程式1計鼻之後的值最佳小於等於（$ ) 1. 5 %。且 經由進一步之量測後，該聚酯薄膜之薄膜厚度方向之折射 率（Nz)大於1.50,雙軸配向度因子（biaxial orientation factor)介於 0.07 與 0.15 之間。 表一 EX.1 EX.2 EX.3 EX.4 EX.5 EX.6 延伸溫 Μ ( τ λ 90 90 90 90 90 90And after further measurement, the refractive index (Nz) of the film thickness direction of the polyester sheet is greater than 1.50; the biaxi orientation factor is between 0.07 and 〇.15, and the alignment thereof The degree factor is defined as shown in Equation 1: X Equation 1: The directionality factor (BOFMNX+Ny)/Nz, where NZ is the refractive index of the film thickness 11 201022016 in the direction of the machine axis and the direction of the horizontal axis, and Νχ and Ny are respectively refracted rate. The bow of the biaxially stretched polyester film (_ plus (4) is less than or equal to 1.5%. The arcuate area is calculated by Equation 2. · Equation 2: bowing region = (b/w) x 1〇 〇%, the lord irw is the horizontal axis direction (TD) width, and β is the maximum dent depth. ° 月 第 — 图 在 在 在 在 在 在 在 在 在 在 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该〇wing regi〇n), the arcuate region (b〇wing ❿ ^ mountain) can be calculated by Equation 2 above, and the end of the process extension zone is set - the infrared heater is distributed in the width direction of the banner - bow: the degree 77 In the cloth state, the temperature difference between the central portion and the two end regions of the width is 5 to 5 〇 ° C ^ that is, the two end regions are higher than the central portion 5 (f) c, thereby suppressing and controlling the occurrence of stretching in the transverse direction The puncturing value of the bowing region is less than or equal to 15%', and the biaxially extending film can maintain a region parallel to the horizontal axis direction after extending through the horizontal axis direction, thereby also making the double The axial extension of the film has a fairly uniform thermal property and a degree of orientation. The detection method of the characteristics of the moldable biaxially stretched polyester film produced by the invention is as follows: Heat shrinkage rate: biaxially stretched polyester film is cut into MD 200mm*TD 25〇_ size, with 2D alignment meter Measure the size of the oven after the size, 6 small, and then take out the size of the measurement, wherein the heat shrinkage rate is calculated according to Equation 3: 12 201022016 Equation 3: (4), the size before baking - the size after baking (4) Pre-size) ^ i6〇〇c (m draw ratio. 4, 100 仏 (rate of film thermoforming) maximum elongation index. Measure the rib and index of refraction using Mirror Φ. Formability. Heat The molding machine is molded with an IR heating plate for 5 seconds to a height of 5 to 10 mm, and is molded at a temperature of 35 ° C to produce a biaxially stretched polyfluorene film with different parameters. Characteristics of some films. The first experimental group (EX. 1) used IV = 〇. 62 g / L <polyethylene terephthalate (pET) resin material, the same material (10) C. The drying step is carried out for five minutes. Then the process is carried out, and the material is extruded at 28 (TC for 1100# m, After that, the cooling gas of 20 m/s is used to cool the resin at a speed of rc/s. Then there is a two-way extension step: firstly, it is a mechanical axis: (the longitudinal extension of the rib, it is in The elongation of the mechanical axis is extended by 3. Q times, followed by the lateral extension of the horizontal axis direction (TD), and the preheating step of 95.t is performed before extending in the horizontal axis direction, followed by the elongation. 3. 5 times the horizontal axis extends. The temperature difference between the central portion of the arcuate temperature and the end region of the extended area infrared heater is 1{rc; then 20 (TC, six-second heat treatment step. Ding 13 201022016 second experimental group (EX. 2 The second experimental group repeats the parameters of the first experimental group and the procedure of the steps, and the difference between the first experimental group and the first experimental group is the central temperature and the end of the arcuate temperature width generated by the extended area infrared heater. The temperature difference of the zone is 2 (TC. The third experimental group (EX.3) The third experiment I and repeats the parameters and the procedure flow of the first experimental group, while the second experimental group differs from the first experimental group in the extension The temperature difference between the central portion of the arcuate temperature range and the two end regions generated by the infrared heater is 5t: The fourth experimental group (EX.4) ❹ The fourth test group is the repeating parameter of the experimental group and the procedure The difference between the fourth experimental group and the first experimental group is that the temperature difference generated by the infrared heater in the extension zone is used. In other words, the four test groups are a control group, and the process conditions are the first vinegar. Film manufacturing process. ..., double The fifth test group is the fifth test group. The fifth experimental group and the first experimental group are repeated. The mechanical axis direction is 14 201022016 == the magnification is changed to 3.3. The 杈 extension ratio of the horizontal axis direction (10) is changed to 3.5 times. The sixth experimental group (Εχ·6) repeats the parameters of the first experimental group and the step flow, and the ί extension; The 杈 extension ratio in the direction of the miscellaneous axis (TD) is changed to 3.0 times. Membrane:: two shows the process parameters of the above six experimental groups and the final thin ink printing process, if the printing is completed, the pattern is better, and the opposite is printed after the thousand If the tolerance of the surface is greater than 1%, the evaluation is,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The leg ratio is the opposite of the best. In the case of film rupture and the forming angle is half, the formability is evaluated as "poor, from ===): the upper one's test group and the fifth to sixth experimental groups The use of this: square to ^ two real two-axis extended polyester film formation performance presented by the invention Biaxially extending poly(tetra) adenine: the degree of goodness is the good formability of the high biaxially stretched polyester film, and the preferred embodiment of the manufacturing method proposed by the strip = the film from the watch The characteristics are discussed, the biaxially stretched (four) film 2 15 201022016 MD and TD refractive index difference in the whole rabbit direction is less than 〇. 〇5, and the heat shrinkage rate of the polyester film under 90 C, six hours is less than The value of the arcuate region after the nose is calculated by Equation 1 is preferably less than or equal to ($) 1.5%, and after further measurement, the refractive index (Nz) of the film thickness direction of the polyester film is greater than 1.50, biaxial alignment The biaxial orientation factor is between 0.07 and 0.15. Table I EX.1 EX.2 EX.3 EX.4 EX.5 EX.6 Extended temperature Μ ( τ λ 90 90 90 90 90 90
MD 延伸倍 率 預熱溫 度（t ) 3.0 3.0 3.0 3.0 3.3 3.0 95 95 95 95 95 95 製程參數MD extension ratio Preheating temperature (t) 3.0 3.0 3.0 3.0 3.3 3.0 95 95 95 95 95 95 Process parameters
TD 預熱時 間（sec) 30 30 30 30 30 30 延伸溫 度（ΐ ) 100 100 100 100 100 100 延伸倍 率 幅中心與兩 端溫度差 (°C ) 1.5 10 3.5 3.5 3.5 3.5 3.0 20 10 10 16 201022016 薄膜特性TD warm-up time (sec) 30 30 30 30 30 30 Extension temperature (ΐ) 100 100 100 100 100 100 Extension ratio center-to-end temperature difference (°C) 1.5 10 3.5 3.5 3.5 3.5 3.0 20 10 10 16 201022016 Film characteristic
熱處理溫度 (°c ) 厚度（β m) 弓形區（°/〇)BOF△ N 熱縮性 (%)Heat treatment temperature (°c) Thickness (β m) Bow zone (°/〇) BOF△ N Heat shrinkage (%)
MDMD
TD 再延伸倍 率 成型性 印刷品質 200 200 200 200 200 200 188 188 188 188 175 225 +0.5 + 1.2 0.8 •3.0 .0.5 +0.1 0.0085 0.015 0.5 0.48 1.9 佳 佳 0.0098 ----- 0.048 0.51 0.45 1.9 佳 好 0.0099 0.035 0.012 -0.011 0.02 0.53 0.46 1.9 佳 好 0.052 0.014 0.01 0.72 0.45 1.9 佳 差 0.62 0.48 1.75 般 佳 0.5 0.52 2.1 佳 佳 而表二則為將第一實驗組（Εχ. ，醋薄膜與市售的商品進行成g質的比較表一= 產為未延伸之PET薄膜，其厚度為2 (Shink〇ng公司所生產）；第二比較產品（ ^延伸之PET薄膜（TGyGb。公司所生產，㈣：A侧 第二比較產品（(：卿.3)為雙軸延伸之PET薄膜（T〇y〇bo 公司所生產’型號：删3)。同樣的，從表二中可以得知 本發明所提出之製造方法可以有效改善傳狀雙轴延伸 聚酉旨缚膜的成型特性，其係利用全幅寬方向的MD與TD折 射，差於0. 01至〇· J之間及弓形區（b⑽恤regi〇n)小 於等於1.5%的特性，藉此可提高聚醋薄膜的可成型性及 17 201022016 提升成型製程的整體穩定度。藉由第一實驗組（EX. 1)所 製成的雙軸延伸聚酯薄膜與第二比較產品（Comp. 2)及第 二比較產品（Comp. 3)的熱縮性比值之比較可以得知，第 一實驗組（EX.1)之熱縮性比值最小，故就雙軸延伸聚酯 薄膜而言’第一實驗組（EX.1)之成品具有最佳的成型性 及成型製程之品質穩定度；另外，本發明提出的製造方法 - 所製成的薄膜同樣具有一定的耐熱性及抗化學性，使該雙 軸延伸聚酯薄膜具有較佳的應用特性。 ❹ 表二 EX.1 Comp. 1 Comp.2 Comp.3 厚度（// m) 188 250 188 188 △ N 0.015 0.002 0.05 0.05 B( )F 0.0957 0.004 0.1718 0.0852 熱縮性 MD 0.48 >8 0.2 0.5 簿 (%) TD 0.5 >8 0.18 0.2 /寸 膜 再延伸倍率 1.9 5. 0 1.2 2.0 特 性 成型性 佳 佳 差 佳 成型製程穩定度 佳 佳 差 差 财熱性 佳 差 佳 佳 抗化學性 佳 差 佳 佳 印刷品質 佳 差 佳 差 —---- 印刷後的干涉斑 不明顯 ---———_ 無 明顯 明顯 18 201022016 练上所述，本發明具有下列諸項優點： 繞加埶t發明所提出之製造方法在延伸區末端設一紅外 態，使該镇贈 寬方向’以形成-弓形的溫度分布狀 。。·即二、之幅寬中心區與兩末端區的溫度差於5至50TD re-expansion ratio molding print quality 200 200 200 200 200 200 188 188 188 188 175 225 +0.5 + 1.2 0.8 •3.0 .0.5 +0.1 0.0085 0.015 0.5 0.48 1.9 Jia Jia 0.0098 ----- 0.048 0.51 0.45 1.9 Good 0.0099 0.035 0.012 -0.011 0.02 0.53 0.46 1.9 Good 0.052 0.014 0.01 0.72 0.45 1.9 Good difference 0.62 0.48 1.75 Excellent 0.5 0.52 2.1 Jia Jia and Table 2 is the first experimental group (Εχ., vinegar film and commercially available products) Comparison of the quality of the g-quality table 1 = PET film produced as unstretched, its thickness is 2 (produced by Shink〇ng Co., Ltd.); second comparative product (^ extended PET film (TGyGb. Company produced, (4): A The second comparative product ((: Qing.3) is a biaxially stretched PET film (Model: deleted by T〇y〇bo Co., Ltd.). Similarly, the present invention can be found from Table 2. The manufacturing method can effectively improve the molding characteristics of the biaxially-oriented polycondensation film, which utilizes MD and TD refraction in the full width direction, and is inferior to 0.01 to 〇·J and the bow area (b(10) shirt regi〇 n) a characteristic of 1.5% or less, thereby increasing the thickness of the vinegar Formability and 17 201022016 Improve the overall stability of the molding process. The biaxially stretched polyester film made by the first experimental group (EX. 1) is compared with the second comparative product (Comp. 2) and the second The comparison of the heat shrinkage ratio of the product (Comp. 3) shows that the heat shrinkage ratio of the first experimental group (EX.1) is the smallest, so the first experimental group (EX) for the biaxially stretched polyester film .1) The finished product has the best formability and quality stability of the molding process; in addition, the manufacturing method proposed by the present invention - the film produced also has certain heat resistance and chemical resistance, so that the biaxially stretched poly Ester film has better application characteristics. ❹ Table II EX.1 Comp. 1 Comp.2 Comp.3 Thickness (// m) 188 250 188 188 △ N 0.015 0.002 0.05 0.05 B( )F 0.0957 0.004 0.1718 0.0852 Heat shrinkage Sex MD 0.48 >8 0.2 0.5 Book (%) TD 0.5 >8 0.18 0.2 / inch film re-expansion ratio 1.9 5. 0 1.2 2.0 Characteristic formability Jiajia poor good molding process stability good Jiacha poor calorie Jiajia's chemical resistance is good, Jiajia print quality is good Excellent difference ----- The interference spot after printing is not obvious-----_ No obvious obvious 18 201022016 As described above, the present invention has the following advantages: The manufacturing method proposed by the invention of the winding An infrared state is set at the end of the extension zone, so that the town gives a wide direction 'to form a bow-shaped temperature distribution. . ·The second is the width of the central area and the temperature difference between the two end regions is 5 to 50
在产轴方如高於中心區5至5代，藉此可以抑制並控制 行拉伸時所產生的弓形區（W '%，另一方面，本製程所製作的雙軸延 小：3;W酯薄_ 9〇。。、六小時之條件下的熱收縮率 向的MD°盘丁與㈣收縮率差小於1%;另一方面全幅寬方 膜的成型& D折射率差G. G1至Μ之間，其即可大幅提高薄 '、H更可以提升整體的成型品質。 明之真述僅為本發明讀佳實施例，非意欲#限本發 為之H 圍，故舉凡制本發明朗書及献内容所 合予陳明。·化’均同理皆包含於本發明之權利保護範圍内， 【圖式簡單說明】 ^圖係本發明之可成型之雙軸延伸聚酿薄膜之流程圖。 第二圖係本發明之薄膜生成弓形區之示意圓。 【主要元件符號說明】 ^ 橫軸方向寬度 B 最大凹陷深度 19In the production axis, such as 5 to 5 generations higher than the central area, thereby suppressing and controlling the arcuate region generated when the stretching is performed (W '%, on the other hand, the biaxial extension produced by the process is small: 3; W ester thin _ 9 〇, the heat shrinkage rate under the condition of six hours to the MD ° disk and (four) shrinkage difference is less than 1%; on the other hand, the full width of the square film forming & D refractive index difference G. Between G1 and Μ, it can greatly improve the thinness, and H can improve the overall molding quality. The mere description of the present invention is only a good example of the present invention, and it is not intended to limit the present invention to H. The invention and the contents are combined with Chen Ming. All of them are included in the scope of protection of the present invention. [Simplified description of the drawings] ^The present invention is a moldable biaxially stretched film. The second figure is a schematic circle of the arcuate generating region of the film of the present invention. [Description of main component symbols] ^ Horizontal axis direction width B Maximum concave depth 19