Polyester film and organic light emitting display device using same
A technology of polyester film and polyester resin, applied in the field of organic light-emitting display devices, which can solve the problems of high light loss, inapplicability to organic light-emitting display devices, low color performance, etc., and achieve the effect of excellent durability
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Embodiment 1
[0084] In a stainless steel autoclave equipped with a stirrer, thermometer and partial reflux cooler, mix terephthalic acid (TPA) as the dicarboxylic acid component and ethylene glycol as the diol component in a molar ratio of 1.7:1.0 (EG), and then carry out the transesterification reaction while distilling off the generated methanol. Thereafter, a polycondensation reaction was carried out at 280° C. under a reduced pressure of 26.6 Pa (0.2 Torr) to obtain a polyester resin.
[0085] The above resin was melt-extruded in an extruder at 280° C. and guided to a t-die (T-Die) to form an unstretched sheet, and then the above sheet was stretched at an angle of 1.0 to 1.5 in the MD direction using a stretching device. The extension ratio performs the initial extension.
[0086] Manufacturing contains 10 grams of binder resin (polyester type Goo Chemical Company's Z690), dichroic dye (Sigma Aldrich's Chlorazol black (Chlorazol black)) 5 grams, curing agent (Nippon Catalyst Company's...
Embodiment 2 to 6 and comparative example 1 to 3
[0089] The procedure of Example 1 above was repeated, but the composition and content of the coating were changed as shown in Table 1 below to prepare a polyester film.
[0090] On the other hand, in Comparative Example 1, a composition in which only a dye was mixed into water without a binder was used as the coating liquid, and in this case, the adhesion between the coating liquid and the polyester resin layer The property is low, so no coating is formed on the polyester resin layer.
[0091] In addition, in Comparative Examples 2 and 3, a common dye (FASTOGEN, DIC Corporation) was used without using a dichroic dye.
[0092] 【Table 1】
[0093]
[0094]
[0095] Evaluation Example 1: Light transmittance
[0096] The light transmittance was measured using a UV-spectrometer (Shimadzu Corporation, UV-2450).
[0097] Evaluation Example 2: Haze
[0098] Haze was measured using a haze meter NDH-5000W from Nippon Denshoku Kogyo Co., Ltd.
[0099] Evaluation Example 3: Degr...
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