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Heat conducting reflection film and backlight module set

A reflective film and reflective layer technology, applied in the field of reflective film, can solve problems such as wrinkles and reflective film bending, achieve uniform heating, reduce production costs, and ensure film formation

Inactive Publication Date: 2015-10-07
HEFEI LUCKY SCI & TECH IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention is used to overcome the defects existing in the existing reflective film to provide a heat-conducting reflective film, which should have the ability to effectively solve the deformation problems of the reflective film caused by uneven heating such as bending and wrinkling when the film body is heated

Method used

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  • Heat conducting reflection film and backlight module set
  • Heat conducting reflection film and backlight module set
  • Heat conducting reflection film and backlight module set

Examples

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preparation example Construction

[0029] For the preparation method of the above heat-conducting reflective film, according to the weight percentage, add diffusion particles: 1% to 10% by weight, PET: 90% by weight to 99% by weight; add reflective particles to the No. B extruder Particles: 20% by weight to 70% by weight, incompatible resin: 3% by weight to 15% by weight, PET: 15% by weight to 77% by weight; adding heat-conducting particles to No. C extruder: 1% by weight to 5% by weight %, PET: 50% by weight to 99% by weight. Through the die head of A / B / C structure, the method of three-layer co-extrusion is used to extrude a thick sheet from the die head, and the sheet is cast, biaxially stretched, heat-set and rolled to obtain a film with both heat conduction and diffusion functions. Thermal reflective film.

[0030] Such as figure 2 As shown, the heat-conducting reflective film of the present invention is used in the backlight module, which can reduce the amount of diffusion film, and play a positive role...

Embodiment 1

[0033]Add 1kg of titanium dioxide and 9kg PET as raw materials for the diffusion layer to layer A of the A / B / C three-layer extruder, add 0.8kg polyolefin resin, 6kg barium sulfate, and 13.2kg PET for the reflective layer to layer B, and add 0.1kg of aluminum oxide with a particle size of 0.01μm, 9.9kg of PET. The above-mentioned three components A, B, and C are simultaneously fed into a twin-screw extruder and melted at 290°C. Adjust the extrusion volume of the three extruders, pass the above three molten materials through a co-extrusion die, and cast the melt onto a rotating cooling roll to form an amorphous A / B / C three-layer structure Cast slabs. After the cast slab is preheated, the longitudinal stretching ratio is sequentially stretched at a ratio of 3.3, and the lateral stretching ratio is carried out at a ratio of 3.5. Heat setting, and finally after cooling, winding and other processes, a heat-conducting reflective film is obtained. The total thickness of the heat-con...

Embodiment 2

[0035] Add 1kg of titanium dioxide and 9kg PET as raw materials for the diffusion layer to layer A of the A / B / C three-layer extruder, add 1.2kg polyolefin resin, 6kg barium sulfate, and 12.8kg PET for the reflective layer to layer B, and add 0.5kg of aluminum nitride with a particle size of 0.1μm, 9.5kg of PET. The above-mentioned three components A, B, and C are simultaneously fed into a twin-screw extruder and melted at 290°C. Adjust the extrusion volume of the three extruders, pass the above three molten materials through a co-extrusion die, and cast the melt onto a rotating cooling roll to form an amorphous A / B / C three-layer structure Cast slabs. After the cast slab is preheated, the longitudinal stretching ratio is sequentially stretched at a ratio of 3.3, and the lateral stretching ratio is carried out at a ratio of 3.5. Heat setting, and finally after cooling, winding and other processes, a heat-conducting reflective film is obtained. The total thickness of the heat-c...

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Abstract

The invention relates to a heat conducting reflection film. The heat conducting reflection film includes a reflection layer and a diffusion layer; one surface of the reflection layer is provided with a heat conducting layer; the heat conducting reflection film is formed through multi-layer co-extrusion; the heat conducting layer contains heat conducting particles; and the weight percentage of the heat conducting particles in the heat conducting layer ranges from 1% to 50%. An A / B / C-layer co-extrusion method is adopted; a thick sheet is extruded out from a mould head; the thick sheet is subjected to casting, biaxial stretching, heat setting and coiling; and the heat conducting reflection film can be obtained. The heat conducting reflection film of the invention has excellent heat conductivity, so that deformation phenomena of the reflection film such as bending and wrinkling due to uneven heating can be avoided; the heat conducting reflection film also has a diffusion property; and therefore, production and use cost can be reduced. The heat conducting reflection film is suitable for the liquid crystal display industry.

Description

technical field [0001] The invention relates to a reflective film which can be used for a backlight source module used for image display, a light reflector and a reflective film for lighting appliances. It also relates to a backlight source module containing the heat-conducting reflective film. Background technique [0002] With the rapid development of the national economy, a large number of electronic products are being widely used in various industries, and liquid crystal display (LCD) is one of the most important products. Because LCD has many advantages such as low energy consumption, low radiation, soft picture, and light volume, LCD has become the most common display technology today. [0003] The LCD is a non-luminous display device, and the display function must be achieved by means of a backlight source. The performance of the backlight will directly affect the image quality of the LCD. The main components of the backlight include: light source, light guide plate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08G02B1/115F21V7/22G02F1/13357
Inventor 程龙宝高青周通霍新莉
Owner HEFEI LUCKY SCI & TECH IND
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