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Infrared light reflector, infrared light reflecting laminated glass, and laminated glass and laminate having cholesteric liquid crystal layers

A light reflective layer, cholesteric technology, applied in glass/slag layered products, windshield, optics, etc., to achieve high heat insulation, improve selective reflection characteristics, and improve light resistance

Active Publication Date: 2012-11-28
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the light resistance test of laminated glass with a cholesteric liquid crystal layer inside, bubbles were generated, and improvement is required for practical use.

Method used

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  • Infrared light reflector, infrared light reflecting laminated glass, and laminated glass and laminate having cholesteric liquid crystal layers
  • Infrared light reflector, infrared light reflecting laminated glass, and laminated glass and laminate having cholesteric liquid crystal layers
  • Infrared light reflector, infrared light reflecting laminated glass, and laminated glass and laminate having cholesteric liquid crystal layers

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preparation example Construction

[0122] 3. Preparation method of infrared light reflector

[0123] The infrared light reflecting plate of the present invention is preferably produced by a coating method. An example of the production method is a production method including at least the following steps:

[0124] (1) Coating a curable liquid crystal composition on the surface of a substrate or the like to form a state of a cholesteric liquid crystal phase,

[0125] (2) The curable liquid crystal composition is irradiated with ultraviolet rays to cause a curing reaction to fix the cholesteric liquid crystal phase to form a light reflection layer.

[0126] By repeating the steps (1) and (2) four times on one side of the substrate, it is possible to fabricate figure 1 The infrared light reflecting plate having the same configuration as shown is shown. In addition, by repeating 4 times on one side of the substrate, and repeating (1) and (2) 2 times on the other side of the substrate before, after, or at the same ...

Embodiment 11

[0197] As a substrate, a polyethylene terephthalate film (hereinafter referred to as "PET film") having a thickness of 188 μm was prepared. This PET film is Fujifilm's trade name "FPA14-188", and has the base layer which consists of a polyurethane resin and an acrylic resin on both surfaces.

[0198] The coating liquid (A) used in the above examples was coated on one surface of the substrate, dried and cured to form a cholesteric liquid crystal layer.

[0199] Then, the coating liquid 1 for easily bonding layers of the following composition was prepared. This coating solution was bar-coated on the surface of the cholesteric liquid crystal layer to a dry film thickness of 2 μm, and dried at a temperature of 150° C. for 7 minutes to form an easily bonding layer. Thus, the laminated body 11 which has an easily bonding layer is produced.

[0200] ・Coating liquid for easy bonding layer 1

[0201] 100 parts by mass of methoxypropyl acetate (PGMEA)

[0202] Polyvinyl butyral resi...

Embodiment 12

[0206] Coating solution 2 for an easily bonding layer having the following composition was prepared.

[0207] ・Coating liquid for easy bonding layer 2

[0208] 100 parts by mass of methoxypropyl acetate (PGMEA)

[0209] Ultraviolet absorbent (Tinuvin326, manufactured by Ciba Japan Co., Ltd.) 2.5 parts by mass

[0210] 2.5 parts by mass of HALS (Tinuvin152, manufactured by Ciba Japan Co., Ltd.)

[0211] Polyvinyl butyral resin

[0212] (B1776 Taiwan Changchun Co., Ltd.) 10 parts by mass

[0213] Except having replaced the coating liquid 1 used in Example 11 with the coating liquid 2 prepared above to form an easily bonding layer, it carried out similarly to Example 11, and produced the laminated body 12 which has an easily bonding layer. Furthermore, except replacing the laminated body 11 with the laminated body 12, it carried out similarly, and produced the laminated glass.

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Abstract

Provided is an infrared light reflector exhibiting improved selective reflection properties. The infrared light reflector is provided with a substrate and at least four light reflecting layers (X1, X2, X3, X4), which is obtained by immobilizing a cholesteric liquid crystal phase, on at least one surface of the substrate in the order from X1 to X4. The light reflecting layers (X1, X2) both have a reflection center wavelength of [lambda]1 (nm) and reflect circularly-polarized light having inverse propagation directions, and the light reflecting layers (X3, X4) both have a reflection center wavelength of [lambda]2 (nm) and reflect circularly-polarized light having inverse propagation directions; and [lambda]2 is greater than [lambda]1.

Description

technical field [0001] The present invention relates to an infrared light reflecting plate having a plurality of light reflecting layers fixed with a cholesteric liquid crystal phase, that is, an infrared light reflecting plate mainly used for heat insulation of windows of buildings and vehicles, and an infrared light reflecting plate utilizing the infrared light. Infrared reflective laminated glass for reflective panels. Moreover, this invention relates to the laminated body which has a cholesteric liquid crystal layer, and the laminated glass using this laminated body. Background technique [0002] In recent years, due to the high interest in the environment and energy, the demand for energy-saving industrial products has increased. As one of them, heat insulation of glass windows in houses and automobiles, that is, reduction of heat load caused by sunlight is being sought. Effect glass and film. In order to reduce the heat load generated by sunlight, it is necessary to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/26B32B7/02B60J1/00E06B5/00G02B5/30
CPCG02B5/3016G02B5/208B32B17/10036B32B17/10G02B1/04B32B17/10788G02B5/0841B32B17/10458B32B17/10761G02B5/0866Y10T428/2848C08L101/12B32B17/10005B32B2367/00
Inventor 冲和宏市桥光芳山田仁
Owner FUJIFILM CORP
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