Melt extrusion device of polarizing film for OLED panel and extrusion method thereof

Abstract

The invention discloses a melt extrusion device of a polarizing film for an OLED panel and an extrusion method thereof, and the melt extrusion device comprises: a cabinet, which is internally provided with a material mixing barrel; a preheating funnel is integrally arranged at the lower end of the mixing barrel; a composite stirring frame is rotatably arranged in the case; a plurality of M-shaped stirring rods acting on the mixing barrel are arranged at the upper end of the composite stirring frame; a Chinese character shi-shaped stirring rod acting on the preheating funnel is integrally arranged at the lower end of the composite stirring frame; the feeding end of the discharging pipe is in butt joint with an opening in the lower end of the preheating funnel; four screw rods are rotationally arranged in an inner cavity of the discharging pipe in a central symmetry manner in an up-down and left-right manner; the four screw rods are matched and screwed with each other for linkage screwing, and the thread depths are gradually reduced from front to back; electric heating rods are embedded in the upper and lower screw rods; three sharp-angled grooves are formed in the left screw rod at intervals; exhaust holes corresponding to the three sharp corner grooves are formed in the right screw rod at intervals; and three leakage holes corresponding to the three exhaust holes are formed in the outer wall of the discharging pipe.

Description

technical field [0001] The invention relates to the field of polarizing film preparation, in particular to a melt extrusion device and an extrusion method for a polarizing film for an OLED panel. Background technique [0002] Since the color OLED is a self-illuminating light source, the underlying aluminum plate will have an obvious reflection image after being irradiated by an external light source on the panel. Therefore, a polarizing film (plate) is required to filter the incident light source to separate the light components so that part of it passes through, while The other part achieves the shielding effect through absorption, reflection and scattering. However, the traditional polarizing film has a low transmittance, which makes the OLED brightness low, and the polarization degree is high, resulting in poor contrast. The patent case No. Zhao 59-159109 in the communiqué also discloses that the transmittance of the polarizing film is 30%. Therefore, a polarizing film wi...

AI Technical Summary

Problems solved by technology

[0002] Since the color OLED is a self-illuminating light source, the underlying aluminum plate will have an obvious reflection image after being irradiated by an external light source on the panel. Therefore, a polarizing film (plate) is required to filter the incident light source to separate the light components so that part of it passes through, while The other part achieves the shielding effect through absorption, reflection and scattering. However, the traditional polarizing film has a low transmittance, which makes the OLED brightness low, and the polarization degree is high, resulting in poor contrast. The patent case No. Zhao 59-159109 in the communiqué also discloses that the transmittance of the polarizing film is 30%. Therefore, a polarizing film with a lower transmittance will cause insufficient brightness of the OLED. In order to increase its brightness, the power of the OLED must be increased. It can increase the brightness of the light source, but this method will relatively shorten the service life. As shown in Figure 9, it is a schematic diagram of the relationship between OLED brightness and life. If the brightness is controlled at 0.6 (600 lumens cd / m2), the brightness will not affect its economy. However, if the luminance is increased to more than 1 (1000 lumens cd / m2), the luminance will decay with time, and its economic life is only up to 2500 hours

[0003] During the preparation process of current polarizers, PMMA resin, PC resin, glass fiber, PVC resin, toughening agent, dispersant and leveling agent are usually mixed in a high-speed mixer for a period of time, and after the mixture is obtained, it is sent into In the melt extruder, it is extruded to the external calendering device to be awakened and rolled into sheets; in this process, it is inconvenient to use equipment in multiple processes for material mixing and melting of the mixture, so we need to design a It is a melting extrusion device for polarizing film that can realize material mixing and melting extrusion in an integrated manner, and exhaust air in time during the hot melting process to improve the quality of the finished product

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