Infrared reflecting plate and infrared reflective bonded glass sheet

A technology of light reflection layer and infrared light, which is applied in windshield, glass/slag layered products, optics, etc., can solve the problems of film surface temperature rise and heat insulation performance reduction, and achieve improved reflection characteristics and excellent reflection characteristics Effect

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

When infrared absorbing pigment is used, although the solar transmittance can be reduced, there are problems of a rise in film surface temperature due to solar absorption and a decrease in thermal insulation performance due to the re-release of the heat.

Method used

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  • Infrared reflecting plate and infrared reflective bonded glass sheet
  • Infrared reflecting plate and infrared reflective bonded glass sheet
  • Infrared reflecting plate and infrared reflective bonded glass sheet

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0104] 3. Preparation method of infrared light reflector

[0105] 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:

[0106] (1) A curable liquid crystal composition is applied on the surface of a substrate or the like to form a state of a cholesteric liquid crystal phase,

[0107] (2) The above-mentioned 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.

[0108] By repeating the steps (1) and (2) twice on one side of the substrate, and then repeating twice on the other side of the substrate; or repeating twice on both sides of the substrate at the same time, it is possible to produce issued with figure 1 The infrared light reflecting plate having the same configuration as shown is shown. In additi...

Embodiment

[0131] Examples and comparative examples are given below to more specifically describe the characteristics of the present invention. Materials, usage amounts, ratios, processing contents, processing procedures, and the like shown in the following examples can be appropriately changed within a range not departing from the gist of the present invention. Therefore, the scope of the present invention should not be limitedly interpreted by the specific examples shown below.

[0132] Coating solutions (A), (B), (C), (D), (E) and (F) having compositions shown in the following table were prepared respectively.

[0133] 【Table 1】

[0134] Composition of Coating Solution (A)

[0135] Material (type)

Material name (maker)

Prescription amount

rod-shaped liquid crystal compound

RM-257(Merck)

10.000 parts by mass

chiral reagent

LC-756(BASF)

0.293 parts by mass

polymerization initiator

Irg-819 (Ciba Specialty Chemicals)

0.419 pa...

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Abstract

Disclosed is an infrared reflecting plate exhibiting an improved selective reflection characteristic. The infrared reflecting plate comprises a substrate having Re (1000) the variation of which is 20 nm or more, at least two light reflecting layers (X1, X2) provided on one surface of the substrate and containing a fixed cholesteric liquid crystal phase, and at least two light reflecting layers (Y1, Y2) provided on the other surface of the substrate and containing a fixed cholesteric liquid crystal phase. The reflective center wavelength of the light reflecting layers (X1, X2) is Lambda X1 (nm), the light reflecting layers reflect circularly polarized light beams the directions of the polarization of which are opposite to each other and which are equal to each other, the reflection center wavelength of the light reflecting layers (Y1, Y2) is Lambda Y1 (nm), the light reflecting layers (Y1, Y2) reflect circularly polarized light beams the directions of the polarization of which are opposite to each other and which are equal to each other, Lambda X1 and Lambda Y1 are not equal to each other, the respective refractive index anisotropies Delta nX1, and Delta nX2 of the light reflecting layer (X1) (lower layer) and the light reflecting layer (X2) (upper layer) satisfy Delta nX2<Delta nX1, and the respective refractive index anisotropies Delta nY1, Delta nY2 of the light reflecting layer (Y1) (lower layer) and the light reflecting layer (Y2); (upper layer) satisfy Delta nY2 < Delta nY1.

Description

technical field [0001] The present invention relates to an infrared light reflective plate having a plurality of light reflective layers immobilized with cholesteric liquid crystal phases and mainly used for heat insulation of windows of buildings and vehicles. In addition, the present invention also relates to an infrared light reflective laminated glass using the above infrared light reflective plate. 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 prevent the transmission of solar rays in either the visible region or the infrared region of the sunlight spectrum. [0003] Widely used as eco-friendly glass (ecoglass) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/26B32B7/02E06B5/00G02B5/30B60J1/00
CPCG02B5/3016G02B5/208B32B17/10036B32B17/10B32B17/10458B32B17/10761B32B17/10678B32B17/10005B32B2367/00
Inventor 冲和宏市桥光芳
Owner FUJIFILM CORP
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