Reflective material

A technology of reflective materials and resin layers, applied in the field of reflective materials, can solve the problems of film deterioration, reduced light reflectivity of reflective films, uneven brightness, etc., and achieve the effect of ensuring bending resistance and heat resistance, and excellent light diffusivity.

Active Publication Date: 2015-03-04
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when an aromatic polyester resin is used as a material for the reflector, since the aromatic ring contained in the molecular chain of the aromatic polyester resin absorbs ultraviolet rays, there is a problem that the reflector is used in a liquid crystal display device or the like. Under the action of ultraviolet rays emitted by the light source, the film deteriorates and turns yellow, thereby reducing the light reflectivity of the reflective film
[0009] In addition, since the above-mentioned reflective sheet has a relatively smooth surface and strong specular reflectivity, when it is incorporated into a liquid crystal display and the light source is turned on, there may be a problem of uneven brightness of the screen (so-called uneven brightness).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0215] (Preparation of resin composition A for resin layer (A))

[0216] Polypropylene resin (manufactured by Nippon Polypropylene Co., Ltd., trade name "NOVATEC PP FY6HA", density (JIS K7112): 0.9 g / cm 3 , MFR (230°C, 21.18N, JIS K-7210): 2.4g / 10min) particles and titanium oxide (manufactured by KRONOS, trade name "KRONOS2230", density 4.2g / cm 3 , rutile titanium oxide, Al, Si surface treatment, TiO 2 Content 96.0%, manufacturing method: chlorine method) mixed in the mass ratio of 50:50, and pelletized using the twin-screw extruder after heating at 270 degreeC, and the resin composition A was produced.

[0217] (Preparation of resin composition B for resin layer (B))

[0218] Amorphous cycloolefin resin A (manufactured by Japan Zeon Co., Ltd., trade name "ZEONOR1430R", density (ASTMD792): 1.01g / cm 3 , glass transition temperature Tg (JIS K7121): 133°C, SP value: 7.4), amorphous cycloolefin resin B (manufactured by Zeon Co., Ltd., trade name "ZEONOR1060R", density (ASTMD792...

Embodiment 2

[0225] In the preparation of the resin composition B of Example 1, particles of an amorphous cycloolefin resin A (manufactured by Nippon Zeon Co., Ltd., trade name "ZEONOR1430R", SP value: 7.4) and polypropylene resin (Nippon Poly Propylene Co., Ltd., trade name "NOVATEC PPEA9", SP value: 8.0) particles were mixed at a mass ratio of 75:25, and in the production of the reflective material of Example 1, the obtained laminated sheet was heated at temperature 138° C. was carried out in the MD for 2-fold roll stretching, and further at 138° C. in the TD for 3-fold tenter stretching, thereby carrying out biaxial stretching. Except for the above two points, the same operation as in Example 1 was obtained. A reflective material (sample) having a thickness of 228 μm (resin layer (A): 190 μm, resin layer (B): 19 μm, lamination ratio A:B=5:1) was prepared. The same evaluation as in Example 1 was performed about the obtained reflective material.

Embodiment 3

[0227] (Preparation of resin composition A for resin layer (A))

[0228] Polypropylene resin (manufactured by Nippon Polypropylene Co., Ltd., trade name "NOVATEC PP FY6HA", density (JIS K7112): 0.9 g / cm 3 , MFR (230°C, 21.18N, JIS K-7210): 2.4g / 10min, SP value: 8.0) particles and titanium oxide (manufactured by KRONOS, trade name "KRONOS2230", density 4.2g / cm 3 , rutile titanium oxide, Al, Si surface treatment, TiO 2 Content 96.0%, manufacturing method: chlorine method) mixed in the mass ratio of 50:50, and pelletized using the twin-screw extruder after heating at 270 degreeC, and the resin composition A was produced.

[0229] (Preparation of resin composition B for resin layer (B))

[0230] Amorphous cyclic olefin resin C (manufactured by Japan Zeon Co., Ltd., trade name "ZEONOR RCY50", a hydrogenated product of a ring-opened polymer of cyclic olefins, density (ISO1183): 1.01 g / cm 3 , MFR (230°C, 21.18N, JIS K7210: 1.2g / 10min, glass transition temperature Tg (JIS K7121): 1...

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Abstract

Disclosed is a novel reflective material which exhibits excellent reflection properties and particularly excellent light diffusing properties. The disclosed reflective material is provided with a resin layer (B) that contains at least two kinds of thermoplastic resin having different solubility parameters (SP values) on at least one surface of a resin layer (A) having internal voids. The reflective material is characterised in that, due to the combination of the thermoplastic resins having different solubility parameters (SP values), the arithmetic mean roughness (Sa) of the three-dimensional surface roughness of the resin layer (B) is at least 0.5µm.

Description

technical field [0001] The present invention relates to a reflective material that can be suitably used as a component of a liquid crystal display, a lighting fixture, or a lighting billboard. Background technique [0002] Reflective materials are used in various fields such as liquid crystal displays, lighting fixtures, and illuminated signboards. Recently, in the field of liquid crystal displays, the size of the device and the improvement of the display performance have been developed, at least it is required to supply more light to the liquid crystal to improve the performance of the backlight unit, and the reflective material is also required to have more excellent light reflection. Sexuality (also called just "reflectiveness"). [0003] As a reflector, for example, a reflective film for a liquid crystal display using a white polyester film mainly made of an aromatic polyester resin is known (see Patent Document 1). [0004] However, when an aromatic polyester resin is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/20B32B27/00B32B27/32F21V7/22G02B5/08G02F1/1335G09F13/16G09F19/12
CPCG02F1/133605G02F1/133606G02B5/0284G02B5/0221B32B3/26B32B27/08B32B27/20F21V7/22
Inventor 堤健智野泽大希河野正彦高木润
Owner MITSUBISHI CHEM CORP
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