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Method for preparing reflective film with light diffusion effect on surface

A technology of reflective film and light diffusion, applied in the field of reflective film, can solve the problems of high processing technology requirements of thin film, non-decreasing yield of thin film, uneven tension of thin film, etc., to achieve excellent light reflection performance and meet mechanical strength. requirements, the effect of reducing manufacturing costs

Active Publication Date: 2013-01-02
JIANGSU YUXING FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the total thickness of the polyester film is controlled below 0.25mm, during the coating process, it is necessary to better control the tension and coating force of the polyester film during operation, otherwise it is easy to cause the film to be damaged during the coating process. Due to the uneven tension, on the one hand, the film yield will not drop, on the other hand, it will also cause uneven coating and affect the reflection effect
Furthermore, this processing method has higher requirements on the processing technology of the film sheet, and will increase the manufacturing cost due to the increase of the process flow.

Method used

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  • Method for preparing reflective film with light diffusion effect on surface
  • Method for preparing reflective film with light diffusion effect on surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Send the polyester chips into the feeding bin, and send them into the fluidized bed after removing metal foreign matter through the metal detector. The temperature of the fluidized bed is controlled at 180°C, and the polyester chips are fluidized;

[0027] (2), the polyester chip after fluidization treatment is sent in drying tower, and drying tower temperature is controlled at 170 ℃, and polyester chip is dried for 6 hours;

[0028] (3) Send the dried polyester chips to the extruder to melt at a temperature of 270° C., and the melt is sent to the T-shaped die through a melt pipe, a coarse filter, a metering pump and a fine filter;

[0029] (4), the melt is extruded from the T-shaped die to form a thick sheet, and the temperature of the T-shaped die when extruding the thick sheet is controlled at 285 ° C, and the thick sheet is cooled and cast with a casting roll and cold air at a temperature of 20 ° C. sheet, the speed of casting roll is controlled at 9.9m / min;

...

Embodiment 2

[0033] (1) Send the polyester chips into the feeding bin, and send them into the fluidized bed after removing metal foreign matter through the metal detector. The temperature of the fluidized bed is controlled at 178°C, and the polyester chips are fluidized;

[0034] (2), the fluidized polyester chip is sent in the drying tower, and the temperature of the drying tower is controlled at 165 ℃, and the polyester chip is dried for 4.5 hours;

[0035] (3) Send the dried polyester chips to the extruder to melt at a temperature of 280°C, and the melt is sent to the T-shaped die through a melt pipe, a coarse filter, a metering pump and a fine filter;

[0036] (4), the melt is extruded from the T-shaped die to form a thick sheet, and the temperature of the T-shaped die when extruding the thick sheet is controlled at 293 ° C, and the thick sheet is cooled and cast with a casting roller and cold air at a temperature of 18 ° C. sheet, the speed of casting roll is controlled at 9.5m / min; ...

Embodiment 3

[0040] (1) Send the polyester chips into the feeding bin, and send them into the fluidized bed after removing metal foreign matter through the metal detector. The temperature of the fluidized bed is controlled at 182°C, and the polyester chips are fluidized;

[0041] (2), the polyester chips after the fluidization treatment are sent in the drying tower, the temperature of the drying tower is controlled at 160 ℃, and the polyester chips are dried for 5 hours;

[0042] (3) Send the dried polyester chips to the extruder to melt at a temperature of 285° C., and the melt is sent to the T-shaped die through a melt pipe, a coarse filter, a metering pump and a fine filter;

[0043] (4), the melt is extruded from the T-shaped die to form a thick sheet, and the temperature of the T-shaped die when extruding the thick sheet is controlled at 290 ° C, and the thick sheet is cooled and cast with a casting roller and cold air at a temperature of 15 ° C. sheet, the speed of casting roll is co...

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Abstract

The invention relates to a method for preparing reflective film with light diffusion effect on surface. The method includes sending polyester chip subjected to fluidization treatment to drying tower for drying, sending the polyester chip to T-shaped die head via a fuse pipe, a rough filter, a metering pump and a fine filter to extrude slab, subjecting the prepared slab to longitudinal stretching to form polyester film, uniformly coating adhesive containing light diffusion agent on both surfaces of the polyester film, performing lateral stretching, then performing thermoforming, drying and curing the coating layer, wind-cooling, and rolling to obtain the reflective film. The invention can reduce manufacture cost, and the prepared reflective film has better mechanical strength and higher reflectivity.

Description

technical field [0001] The invention relates to a method for preparing a reflective film with a light diffusion effect on the surface, and belongs to the technical field of reflective films in liquid crystal display backlight modules. Background technique [0002] In recent years, reflective films have been widely used in the fields of liquid crystal display reflectors, projection screens, planar light source components, and lighting reflectors. For example, in liquid crystal display reflectors, in order to provide as much light as possible to the liquid crystal display to improve the performance of the backlight, a reflective film with high reflectivity is required in view of the requirements for larger screen size of the device and higher display performance. . [0003] As a reflective film, the material is generally polyethylene terephthalate (polyethylene terephthalate, PET) or polycarbonate (polycarbonate, PC), by adding inorganic filler particles or incompatible polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01B29C47/00B29C55/02B05D3/02
Inventor 刘勤学顾洪林周涵俊秦志凤刘文虎
Owner JIANGSU YUXING FILM TECH
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