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Aliphatic polyester-based resin reflective film and reflective plate

A polyester and aliphatic technology, used in optics, instruments, nonlinear optics, etc., can solve problems such as insufficient shape retention, and achieve the effect of high light reflectivity

Inactive Publication Date: 2007-06-27
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the reflective film is required to retain the shape when it is bent, but the conventional reflective film has a disadvantage of insufficient shape retainability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] Particles of a lactic acid-based polymer with a weight average molecular weight of 200,000 (NW4032D: manufactured by Kayugaruta Polima Co., Ltd., with a D body content of 1.5%) and titanium oxide with an average particle diameter of 0.25 μm (Tokyo PF-740: Ishihara Sangyo Co., Ltd.) Co., Ltd.) were mixed at a ratio of 50% by mass / 50% by mass to form a mixture. With respect to 100 parts by mass of this mixture, 3 parts by mass of a hydrolysis inhibitor (bis(dipropylphenyl)carbodiimide) was added and mixed, and then pelletized using a biaxial extruder to prepare a so-called main compound . The main compound and the lactic acid-based polymer were mixed at a ratio of 40% by mass / 60% by mass to prepare a resin composition.

[0118] Then, the obtained resin composition was extruded from a T-die at 220° C. using a uniaxial extruder, and cooled and solidified to form a film. The obtained film was stretched 2.5 times in MD and 2.8 times in TD at a temperature of 65° C., and the...

Embodiment 2

[0121] In Example 1, titanium oxide with an average particle size of 0.28 μm (Tokyo CR-95: manufactured by Ishihara Sangyo Co., Ltd.) was used instead of titanium oxide with an average particle size of 0.25 μm (Tokyo PF-740 : Except Ishihara Sangyo Co., Ltd. product), it carried out similarly to Example 1, and produced the reflective film of thickness 188 micrometers. The same measurement and evaluation as in Example 1 were performed on the obtained reflective film. The results are shown in Tables 1 and 2.

Embodiment 3

[0123] In Example 1, a titanium oxide having an average particle size of 0.21 μm (Tokyo PF728: manufactured by Ishihara Sangyo Co., Ltd.) was used in place of the titanium oxide having an average particle size of 0.25 μm (Tokyo PF-740: Ishihara). Except for Sangyo Co., Ltd. product), it carried out similarly to Example 1, and produced the reflective film of thickness 188 micrometers. The same measurement and evaluation as in Example 1 were performed on the obtained reflective film. The results are shown in Tables 1 and 2.

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Abstract

The invention provides a reflecting film which comprises an aliphatic polyester resin, has excellent light reflection characteristics, and does not yellow with time during use. The reflecting film of an aliphatic polyester resin is a reflecting film formed from a resin composition obtained by compounding an aliphatic polyester resin with a finely particulate filler consisting mainly of titanium oxide, wherein the titanium oxide has a niobium content of 500 ppm or lower. The surface of the titanium oxide preferably has been coated with at least one inert inorganic oxide selected among silica, alumina, and zirconia.

Description

technical field [0001] The present invention relates to an aliphatic polyester-based resin reflective film, in particular, to a reflective film used for a liquid crystal display device, an illumination device, a reflective plate such as an illuminated signboard, and the like. Moreover, it is related with the reflection plate used for a liquid crystal display device, a lighting apparatus, an illuminated signboard, etc. which are formed by covering the metal plate, the resin plate, etc. with the said reflection film. Background technique [0002] In recent years, reflective films have been used in the fields of reflective plates for liquid crystal display devices, parts for projection screens or planar light sources, reflective plates for lighting equipment, and reflective plates for illuminating billboards. For example, in a reflector of a liquid crystal display, in order to increase the performance of the backlight unit by supplying as much light as possible to the liquid cr...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08K9/02C08L67/00G02F1/1335C08L101/16C08L67/04
Inventor 渡边孝之西田未来胜原一成比留间隆高木润
Owner MITSUBISHI CHEM CORP
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