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A kind of preparation method of microporous optical reflective film

An optical reflection and microporous technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low reflectivity of reflective film, uneven foaming, and low foaming efficiency, so as to reduce manufacturing costs and benefit The effect of recycling, high reflection effect

Active Publication Date: 2022-05-03
浙江永盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the existing optical reflective films on the market are made of various additives. On the one hand, due to the high cost of additives, the cost performance of the product is not advantageous. On the other hand, due to uneven foaming and low foaming efficiency, the prepared The reflection rate of the reflective film is not high; in addition, due to the use of various additives in the product, the recycling of materials is limited

Method used

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  • A kind of preparation method of microporous optical reflective film
  • A kind of preparation method of microporous optical reflective film

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preparation example Construction

[0023] A preparation method of a microporous optical reflective film, in which micropores are uniformly distributed in the reflective film, and a PET type polymer reflective film is taken as an example, the preparation method comprises:

[0024] The production of PET substrates can be single-layer, double-layer or three-layer according to needs: a common method is to dry and pretreat PET slices first, then melt them by extrusion, and cast them into films. The gas-type twin-screw extruder does not need a drying device. Regarding solvents, the types of solvents that can be used include DMF (N,N-dimethylformamide), xylene, phenol, tetrachloroethane, acetone, butanone , ethanol, etc., the solvent can be used alone, or can be used after compounding as needed. In this embodiment, PET reflective film is taken as an example, and phenol+tetrachloroethane can be used as a mixed solvent. In order to make the base film and solvent quickly Compatibility occurs, the base film and the mixed ...

Embodiment 1

[0030] Taking the high molecular polymer as PET as an example, the preparation method of the microporous optical reflective film includes the following steps:

[0031] Preparation of PET base material: first dry and pretreat PET slices, the drying temperature is 150 degrees for 4 hours, and then melted by extrusion, the extrusion temperature is set at 275 degrees, the melt is transported to the hanger type die head, and from the die The slit mouth of the head flows out, and is pressed by the electrostatic adsorption system on the quenching roller to form a film. Phenol: tetrachloroethane = 7: 3 is used as the mixed solvent. In order to make the base film and the solvent quickly compatible, the above-mentioned The base film and the mixed solvent are preheated, and the preheating temperature is 75 degrees;

[0032] In order to make the stretching go smoothly, and further promote the compatibility between the solvent and the base film, the above-mentioned coated film is sent to a...

Embodiment 2

[0037] Taking the high molecular polymer as PP as an example, the preparation method of the microporous optical reflective film includes the following steps:

[0038] Preparation of PP base material: first send PP chips into the extruder for extrusion and melting, the extrusion temperature is set at 200 degrees, the melt is transported to the hanger-type die, and flows out from the slit of the die, and is electrostatically charged. The adsorption system presses the chill roll to form a film. Chloroform was chosen as the solvent. In order to make the base film and the solvent compatible quickly, the above base film and the mixed solvent can be preheated, and the preheating temperature is 50 degrees;

[0039] In order to make the stretching go smoothly, and further promote the compatibility between the solvent and the base film, the above-mentioned coated film is sent to an oven for heating, and the heating temperature is 100 degrees;

[0040] The heated film is first stretche...

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Abstract

The invention discloses a preparation method of a microporous optical reflective film. The preparation method comprises the following steps: providing a base film and a solvent, coating the solvent on the surface of the base film; heating the coated film, The solvent can quickly penetrate into the base film; the heated film is stretched to make the base film generate micropores under the action of the solvent and tensile stress; the above-mentioned microporous film is heat-set, and the formation of the crystal phase is microscopic. The pores are solidified to improve the thermal shrinkage characteristics of the film; the finished product is made by cooling the film, and the polymer is used to form pores under the action of the solvent and tensile stress, thereby forming an optical thinning layer inside the film, forming a total reflection interface, achieving extreme High reflection effect, and at the same time, because the finished product of this solution does not contain any other additives except the additives of the polymer itself, the manufacturing cost is reduced, and it is beneficial to the recycling in the later stage.

Description

technical field [0001] The invention relates to a preparation method of a reflective film, more specifically, to a preparation method of a microporous optical reflective film, which belongs to the field of thin film chemical fibers. Background technique [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, which cannot emit light by itself. The display function must be achieved with the help of the backlight source. The performance of the backlight source directly affects the image quality of the LCD, especially the brightness of the backlight source, which directly affects the brightness of the LCD. [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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/08G02F1/13357
CPCG02B5/08G02F1/133605
Inventor 樊华伟徐永明吴先民陈晓琦李锋寿叶军陈国刚
Owner 浙江永盛科技有限公司