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High-reflectivity reflecting film and manufacturing method thereof

A technology of high reflectivity and reflective film, which is applied in the field of reflective film, can solve the problems that the reflective film is easy to scratch, the porosity should not be too large, and cannot be further improved, so as to improve convenience, avoid uneven brightness, and increase the interlayer Effects of Interface Differences and Refractive Index Differences

Active Publication Date: 2013-04-17
WUHAN KINGBULL ECONOMIC DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, as the porosity of the reflective film increases, that is, the micropore or bubble content of the film increases, the reflective film becomes softer, which makes the reflective film easy to scratch and wrinkle during use and processing, so the porosity should not be too large
In this way, the improvement of reflectivity by using the difference in refractive index between the matrix resin of the film and the micropores or bubbles will be limited, resulting in the reflectivity of the reflective film manufactured by this method can only be increased to a certain extent, and then cannot be improved.

Method used

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  • High-reflectivity reflecting film and manufacturing method thereof
  • High-reflectivity reflecting film and manufacturing method thereof
  • High-reflectivity reflecting film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Pre-crystallize and dry polyester A layer raw materials and polyester B layer raw materials at a temperature of about 180°C, mix them uniformly and transport them to the extruder; among them, the A layer raw materials are 100 parts of polyester and 2wt% TiO 2 (average particle diameter 3 μ m) and auxiliary agents such as antioxidant, heat stabilizer, light stabilizer; B layer raw material is 100 parts of polyester and 12wt% BaSO 4 (average particle size is 0.7μm, surface treated with polyethylene glycol), 8wt% polymethacrylic acid particles (average particle size 1.2μm), 10wt% polymethylpentene, 0.01wt% 2,4-dihydroxydi Benzophenone and 0.01wt% 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, and auxiliary agents such as antioxidant and heat stabilizer, also contain 0.5wt% ethylene-methyl Sodium acrylate copolymer, 2.0 wt% polyethylene glycol and 3.5 wt% sodium benzoate.

[0055] In the above-mentioned extruder, the raw material is melted and extruded at a temperature of abo...

Embodiment 2

[0060] Except that the content of the ethylene-sodium methacrylate copolymer added in the B layer is changed to 0.7wt%, the content of polyethylene glycol is changed to 2.3wt%, and the content of sodium benzoate is changed to 3.0wt%. Conditions to make a reflective film.

Embodiment 3

[0062] Except that the content of the ethylene-sodium methacrylate copolymer added in the B layer is changed to 1.0wt%, the content of polyethylene glycol is changed to 4.0wt%, and the content of sodium benzoate is changed to 1.0wt%. Conditions to make a reflective film.

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Abstract

The invention discloses a high-reflectivity reflecting film and a manufacturing method thereof. The high-reflectivity reflecting film comprises a polyester B layer internally containing pore space, at least one polyester A layer is arranged on the working surface of the polyester B layer, the reflectivity of the reflecting film at 560mm wavelength position is not less than 98 percent, and the average diameter difference of the surface sphaerocrystal of the polyester A layer and the sphaerocrystal of the polyester B layer is no less than 4.0mum. In the invention, during the machining process, the polyester A layer is respectively induced to fast generate thick sphaerocrystal for two times sequentially, and the polyester B layer adopts polyester as main materials and is added with core forming agent to form fine sphaerocrystal, so that the average diameter difference of the surface sphaerocrystal of the polyester A layer and the sphaerocrystal of the polyester B layer is no less than 4.0mum, thus increasing the interlayer interface difference and reflectivity difference, enlarging light reflecting interface, improving the reflectivity of the reflecting film, and being beneficial to scattered reflection forming of the thick sphaerocrystal on the surface of the polyester A layer.

Description

technical field [0001] The invention relates to a reflective film of a backlight source used in a liquid crystal display and the like, in particular to a reflective film with high reflectivity and a manufacturing method thereof. Background technique [0002] Currently, liquid crystal displays are widely used in mobile phones, GPS navigators, computers, televisions, etc. as display devices. The liquid crystal display itself does not emit light, and needs to provide illumination light through a backlight source. The backlight needs to be equipped with a reflective film to reduce the light loss caused by light leakage from the side and the back, thereby improving the brightness of the display. At the same time, the reflected light generated by the reflective film is required to be very uniform, so as to provide a bright and uniform high-quality picture. The reflective film usually used is to add white inorganic particles or organic particles to achieve the purpose of reflectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/18
Inventor 陈厚忠
Owner WUHAN KINGBULL ECONOMIC DEV
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