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Method for preparing optical reflective film

A technology of optical reflection and longitudinal stretching, which is applied in optics, optical components, coatings, etc., can solve the problem that the reflectivity of the reflective film needs to be improved, and achieve the effect of lossless light reflection, high efficiency and light reflection

Active Publication Date: 2011-06-15
NINGBO DXC NEW MATERIAL TECH
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  • Abstract
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Problems solved by technology

[0005] How to improve the optical performance of the reflective film, increase the reflectivity, reduce light loss, so that the light emitted from the light source can be utilized to the greatest extent is an important issue to be solved in the field of liquid crystal display. The reflectivity of the film needs to be improved

Method used

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Embodiment Construction

[0019] The present invention will be further described in detail below in combination with specific embodiments.

[0020] A preparation method of an optical reflection film, in which spherical microbubbles are evenly distributed in the optical reflection film, the preparation method comprises the following steps:

[0021] A. Use PET as the masterbatch, mix chain extender, organic foaming agent, and nano-scale granular inorganic filler into the masterbatch, and mix evenly. Masterbatch: chain extender: organic foaming agent: nano-scale granular The mass ratio of the inorganic filler is 2:1:2:1; the chain extender is phthalic anhydride, the organic foaming agent is azodicarbonamide, and the nano-scale granular inorganic filler is nano-silica .

[0022] B. adding the compound in step A to a twin-screw extruder for blending and granulation to obtain masterbatch;

[0023] C. Dry the masterbatch prepared in step B. After drying, pour the masterbatch into a single-screw extruder or ...

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Abstract

The invention discloses a method for preparing an optical reflective film. Spherical microbubbles are uniformly distributed in the optical reflective film. The preparation method comprises the following steps of: A, blending a chain extender, an organic foaming agent and a nanometer granular inorganic filler into polyethylene terephthalate (PET) serving as a master batch, and mixing uniformly; B, performing blending granulation on a mixture obtained in step A to obtain masterbatches; C, melting and plasticizing the masterbatches, and then performing tape casting to obtain a cast piece; and D, longitudinally stretching the glassy cast piece prepared in step C by adopting a longitudinal stretching machine in a heating state, and then performing transverse stretching by adopting a widening machine in a heating state, wherein the longitudinal stretching ratio is between 3 and 4, and the transverse stretching ratio and the longitudinal stretching ratio are consistent. The microbubbles are uniformly distributed in the prepared optical film, each microbubble can be used as a reflective unit, and reflective units which are distributed in high density form total reflection on rays to achieve the aims of high efficiency and ray reflection without loss.

Description

(1) Technical field [0001] The invention relates to a preparation method of an optical reflection film. (2) Background technology [0002] Liquid crystal display (LCD) is the most common display technology today, and it will also be the mainstream display technology in the next 20-30 years. Liquid crystal is a substance between solid and liquid. It cannot emit light by itself. It must use a backlight to achieve the display function. The quality of the backlight source will directly affect the image quality of the LCD, especially the brightness of the backlight source, which will directly affect the brightness of the LCD surface. [0003] The liquid crystal backlight system is mainly composed of a light source, a light guide plate, and various optical films. It has the characteristics of high brightness, long life, and uniform light emission. At present, there are mainly three types of backlight sources: EL, CCFL, and LED. According to the location of the light source, they...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08J9/10C08K3/36C08K3/30C08K3/26B29C55/14B29C41/52G02B1/04
Inventor 罗培栋
Owner NINGBO DXC NEW MATERIAL TECH
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