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Heat-ray shielding material

A technology of heat ray shielding and light, applied in thin material processing, biochemical instruments, biochemical equipment and methods, etc., can solve problems such as increased haze and impossible control of silver particles

Inactive Publication Date: 2013-02-13
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it is impossible to control the position of the silver particles in the silver layer
This creates the problem that the haze increases and it reflects visible light near the infrared region, making it problematic to be a specular surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0188]

[0189] -Synthesis of Flat Metal Particles-

[0190] A 0.5 g / L polystyrenesulfonic acid aqueous solution (2.5 mL) was added to a 2.5 mM sodium citrate aqueous solution (50 mL), followed by heating to 35°C. Next, 10 mM sodium borohydride solution (3 mL) was added to the resulting solution. Next, 0.5 mM silver nitrate aqueous solution (50 mL) was added thereto at 20 mL / min with stirring. This solution was stirred for 30 min to prepare a seed particle solution.

[0191] Next, ion-exchanged water (87.1 mL) was added to a 2.5 mM sodium citrate aqueous solution (132.7 mL), followed by heating to 35°C. Subsequently, a 10 mM ascorbic acid aqueous solution (2 mL) was added to the resulting solution, followed by adding thereto 42.4 mL of the seed particle solution prepared above. Further, 0.5 mM silver nitrate aqueous solution (79.6 mL) was added thereto at 10 mL / min with stirring. Next, the solution obtained above was stirred for 30 min, and then 0.35M aqueous potassium h...

Embodiment 2 to 29 and comparative example 1 to 6

[0198]

[0199] Except changing the amount of 1M NaOH and water, and the number of rotations and the rotation time of the centrifuge (product of KOKUSAN Co., Ltd., H-200N, ANGLE ROTOR BN) to those shown in Tables 1-1 and 1-2 Except that, the flat metal particles and heat ray shielding materials of Examples 2 to 29 and Comparative Examples 1 to 6 were prepared in the same manner as in Example 1.

Embodiment 30 to 47

[0201]

[0202] In addition to changing the amount of 2.5mM sodium citrate aqueous solution from 132.7mL to 255.2mL, changing the amount of ion-exchanged water from 87.1mL to 127.6mL, changing 72mL of 0.17M NaOH aqueous solution to 72mL of 0.08M NaOH aqueous solution, and changing The amount of 1M NaOH and water, and the number of revolutions and the rotation time of the centrifuge (the product of KOKUSAN Co., Ltd., H-200N, ANGLE ROTOR BN) are changed to those shown in Table 1-2, with embodiment 1 Flat metal particles and heat ray shielding materials of Examples 30 to 47 were prepared in the same manner as in Examples 30 to 47.

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Abstract

Disclosed is a heat-ray shielding material having excellent infrared reflectivity for near infrared rays for example and having excellent transparency for visible light. A heat-ray shielding material is formed comprising a substrate and a metal particle-containing layer, which contains at least one type of metal particle, on the substrate, wherein the metal particles comprise at least 60 numeric percent of flat plate-shaped metal particles having a substantially hexagonal shape or a substantially discoid shape, and the variation coefficient of the distribution of the distance between the centres of adjacent flat plate-shaped metal particles is at most 20%. Furthermore, the area ratio [(B / A)100], which is the ratio of the total value (B) of the area of the flat plate-shaped metal particles with respect to the area (A) of the substrate when the heat-ray shielding material is viewed from above, is preferably at least 20%.

Description

technical field [0001] The present invention relates to a heat ray shielding material that is excellent in reflectance for infrared rays such as near infrared rays and excellent in transmittance for visible light. Background technique [0002] In recent years, heat ray shielding materials for windows of buildings and automobiles have been developed as one of energy-saving measures for reducing carbon dioxide emissions. From the perspective of heat ray shielding performance (solar radiation heat gain coefficient), heat ray reflective materials that no longer radiate heat can reradiate absorbed light to the room (about 1 / 3 of the absorbed solar radiant energy) A heat absorbing material is more desirable, and various techniques have been proposed. [0003] For example, Ag metal thin films are commonly used as heat ray reflective materials due to their high reflectivity. [0004] However, Ag metal thin films reflect not only visible light and heat rays but also radio waves, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/26C03C17/28B22F1/068B22F1/16
CPCC03C2217/465G02B5/208C03C2217/479G09F9/00B32B17/00C03C17/007C03C2217/42B32B5/16H01B5/00G02B5/206C12N15/00B22F1/00C12M1/34B22F7/04B22F9/24B32B2311/08Y10T428/25B22F1/068B22F1/16
Inventor 白田真也谷武晴清都尚治
Owner FUJIFILM CORP
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