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Aliphatic polyester resin reflection film and reflector plate

A polyester and aliphatic technology, applied in the field of reflective film, can solve the problems of inability to ensure the strength, the film is easy to break, and the productivity is reduced, and achieves the effect of excellent balance and high light reflectivity

Inactive Publication Date: 2007-10-17
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since a film made of polypropylene to which 60% by mass or more of an inorganic filler is added cannot secure sufficient strength, the film is easily broken during stretching, which easily leads to a decrease in productivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0104] Examples are shown below, and the present invention will be described more specifically, but the present invention is not limited to these, and various applications are possible without departing from the technical idea of ​​the present invention. In addition, the measured value and evaluation shown in an Example were performed as follows. Here, the pulling (conveying) direction of the film is represented as MD, and the vertical direction thereof is represented as TD.

[0105] (measurement and evaluation method)

[0106] (1) Refractive index

[0107] The refractive index of resin is measured based on A method of JISK-7142.

[0108] (2) Vanadium content in titanium oxide (ppm)

[0109] Titanium oxide was decomposed with hydrofluoric acid in a microwave sample decomposing device, and the obtained solution was quantitatively analyzed using an ICP emission spectroscopic analyzer.

[0110] (3) Average particle size

[0111] Use the powder specific surface measuring devi...

Embodiment 1

[0153] (Preparation of resin composition)

[0154] Particles of lactic acid polymer (NW4032D: manufactured by カ一ギルダウポリマ Co., Ltd., D body content 1.5%) with a weight average molecular weight of 200,000 and titanium oxide (タイペク PF-711: Ishihara Industry ( Co., Ltd.) were mixed at a ratio of 50% by mass / 50% by mass to form a mixture. Based on 100 parts by mass of this mixture, 3 parts by mass of a hydrolysis inhibitor (bis(dipropylphenyl)carbodiimide) was added and mixed, and pelletized using a twin-screw extruder to produce a so-called master compound . The main compound and the lactic acid polymer were mixed at a ratio of 40% by mass / 60% by mass to prepare a resin composition. Then, the resin composition was supplied to an extruder heated to 220°C.

[0155] (film production)

[0156] The molten resin composition is extruded from an extruder into a sheet using a T-die, cooled and solidified to form a film. The obtained film was stretched 2.5 times in MD and 2.8 times in TD...

Embodiment 2

[0158] As shown in Table 1, in Example 1, in addition to using titanium oxide (タイペク R-630: manufactured by Ishihara Sangyo Co., Ltd.) with an average particle diameter of 0.24 μm instead of titanium oxide with an average particle diameter of 0.25 μm ( A reflective film having a thickness of 250 μm was obtained in the same manner as in Example 1 except for Tape PF-711: manufactured by Ishihara Sangyo Co., Ltd. About the obtained reflective film, the same measurement and evaluation as Example 1 were performed. The results are shown in Table 2. In addition, the yellowness (YI value) of the base resin and the yellowness (YI value) of the reflective film are the values ​​shown in Table 1.

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PUM

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Abstract

Disclosed is a reflective film having excellent light-reflecting properties which do not deteriorate over time during use. Specifically disclosed is an aliphatic polyester resin reflective film which is made of a resin composition containing an aliphatic polyester resin and a pulverized filler. The yellow color degree (YI value) of this reflective film is less than 3.6. The pulverized filler is preferably composed of at least one substance selected from the group consisting of calcium carbonates, barium sulfates, titanium oxides and zinc oxides.

Description

technical field [0001] The present invention relates to an aliphatic polyester-based resin reflective film and a reflective plate having the reflective film. In particular, it relates to a reflective film used for liquid crystal display devices, lighting equipment, reflective plates for illuminating billboards, and the like. Background technique [0002] In recent years, reflective films have been used in the fields of reflectors for liquid crystal display devices, projection screens for projection, components of planar light sources, reflectors for lighting equipment, and reflectors for illuminating billboards. For example, in the reflector of a liquid crystal display, in order to supply as much light as possible to the liquid crystal to improve the performance of the backlight unit in view of the requirement for a larger screen of the device and higher display performance, Reflective film that requires high reflective performance. [0003] In addition, as a display device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08C08K3/30C08J9/00C08K9/02C08K3/22C08L67/00C08K3/26G02F1/1335
Inventor 西田未来渡边孝之比留间隆胜原一成高木润
Owner MITSUBISHI CHEM CORP
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