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Infrared shielding film, method for producing infrared shielding film, and infrared shield

A technology of infrared shielding and manufacturing method, applied in optical components, instruments, optics, etc., can solve problems such as difficulty in large-scale cost, reduced visible light transmittance of infrared shielding, and many layers.

Inactive Publication Date: 2014-02-19
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technology, since the difference in refractive index between polymers is small, 20 to 40 layers need to be stacked, and there are difficulties in terms of cost and large area due to the large number of layers.
In addition, since polymers with different glass transition temperatures are laminated, there is a problem that the internal structure is deformed due to repeated temperature differences during long-term use, and the infrared shielding property and visible light transmittance are likely to decrease.

Method used

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  • Infrared shielding film, method for producing infrared shielding film, and infrared shield
  • Infrared shielding film, method for producing infrared shielding film, and infrared shield

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0225]

[0226] The method for preparing the coating liquid for the high refractive index layer and the coating liquid for the low refractive index layer is not particularly limited, and examples thereof include adding temperature-responsive polymers, cellulose compounds, polyvinyl acetal resins, and metal oxides. Particles and other additives are added as needed, and the method of stirring and mixing. At this time, the order of adding the temperature-responsive polymer, cellulose compound or polyvinyl acetal resin, metal oxide particles, and other additives added as needed is not particularly limited, and each component may be sequentially added and mixed while stirring. Mixing can be done by adding all at once while stirring. If necessary, a solvent may be further used to obtain an appropriate viscosity.

[0227]

[0228] The viscosity of the high-refractive index layer coating solution and the low-refractive index layer coating solution at 25°C when performing simultan...

Embodiment I-1

[0249] "The Production of Infrared Shielding Film"

[0250] [Production of sample 1-1]

[0251] (Preparation of Coating Liquid for High Refractive Index Layer)

[0252] The following additives (1) to (4) were sequentially added and mixed to prepare a coating liquid for a high refractive index layer. In addition, poly-N-n-propyl acrylamide of PNIPAM (weight average molecular weight 19,000-26,000) manufactured by Sigma Aldrich Japan Co., Ltd. was used as poly-N-n-propyl acrylamide.

[0253] (1) 30 g of 30 mass % zirconia particle sol (volume average particle diameter 10 nm)

[0254] (2) 200 g of 5.0 mass % poly-N-n-propylacrylamide aqueous solution (lower limit critical solution temperature 21° C.)

[0255] (3) Pure water 150g

[0256] (4) 0.45 g of 5.0 mass % surfactant aqueous solutions (Nissan cation 2-DB-500E, quaternary ammonium salt cationic surfactant, manufactured by NOF Corporation).

[0257] (Preparation of Low Refractive Index Layer Coating Liquid)

[0258] The fo...

Embodiment I-2

[0358] [Production of near-infrared reflectors 1-1 to 1-15]

[0359] Near-infrared reflectors 1-1 to 1-15 were produced using the infrared shielding films of samples 1-1 to 1-15 produced in Example I-1. The infrared shielding films of samples 1-1 to 1-15 were respectively bonded to transparent acrylic resin plates with a thickness of 5 mm and 20 cm×20 cm with acrylic adhesives to produce near infrared reflectors 1-1 to 1-15.

[0360] [Evaluation]

[0361] With respect to the near-infrared reflectors 1-1 to 1-15 of the present invention prepared above, although the size of the near-infrared reflectors is large, they can be easily used. In addition, by using the infrared shielding film of the present invention, it can be confirmed that excellent near-infrared reflectivity.

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Abstract

The purpose of the present invention is to provide an infrared shielding film, method for producing same, and infrared shield provided with the infrared shielding film, whereby it is possible to maintain stable infrared shielding performance, visible light transmittance, flexibility, and transparency over time. This infrared shielding film having at least one unit constituted of a high-refractive-index layer and a low-refractive-index layer comprising metal oxide particles atop a substrate is achieved when (i) the high-refractive-index layer and / or the low-refractive-index layer comprises a temperature-responsive polymer as a binder component or (ii) the high-refractive-index layer comprises either a cellulose compound or polyvinyl acetal resin as a binder component, and the low-refractive-index layer comprises a binder component different from that of the high-refractive-index layer.

Description

technical field [0001] The invention relates to an infrared shielding film, a manufacturing method of the infrared shielding film and an infrared shielding body. Background technique [0002] In recent years, interest in energy-saving measures has increased, and from the viewpoint of reducing the load on air conditioners, there has been an increasing demand for infrared shielding films installed on window glass of buildings or vehicles to block the transmission of solar heat rays. [0003] As a method of forming an infrared shielding film, it has mainly been proposed to form a laminated film having a structure in which high-refractive-index layers and low-refractive-index layers are alternately laminated using dry film-forming methods such as vapor deposition and sputtering. However, the dry film-forming method has problems in that a vacuum device and the like for film-forming are relatively large, the production cost is high, and it is difficult to enlarge the area, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/26G02B5/28
CPCG02B5/208G02B5/282G02B5/206G02B5/287
Inventor 高向保彦
Owner KONICA MINOLTA INC
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