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Laminated film

A technology of laminated film and absorbing layer, applied in the field of laminated film, can solve the problem that the laminated film is difficult to shield the infrared region and the like

Inactive Publication Date: 2020-02-21
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in an infrared (heat ray) shielding film obtained by forming such a heat ray reflective film on a film, it may be difficult to sufficiently shield the infrared region by only the laminated film in consideration of productivity and optical characteristics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0096] As a preparation method of the coating liquid for infrared absorbing layers, there is no particular limitation as long as a specific pH of the film surface can be obtained. The coating liquid for an infrared absorbing layer can be prepared, for example, by adding other additives such as an infrared absorbing agent, a resin, and a surfactant to be used as necessary to a solvent, followed by stirring and mixing. In the case of using an ultraviolet curable resin, a photopolymerization initiator is further added. At this time, the order of addition of each component is not particularly limited either, and each component may be sequentially added and mixed while stirring, or may be added and mixed at one time while stirring.

[0097] For pH adjustment, as long as an optional acidic or basic pH adjuster is used, for example, in the case of an aqueous solvent, an alkali such as sodium carbonate or sodium hydroxide can be added to the coating liquid for an infrared absorbing la...

Embodiment

[0203] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. In addition, in an Example, although the expression of "part" or "%" is used sometimes, unless otherwise specified, it means "part by mass" or "% by mass".

[0204] "Making of laminated film"

[0205]

[0206] (Preparation of Coating Solution 1 for Infrared Absorbing Layer)

[0207] The following materials were mixed and stirred at room temperature for 30 minutes to prepare a coating liquid 1 for an infrared absorbing layer.

[0208] Acrit 8UA-301 (urethane-modified acrylic polymer: manufactured by Taisei Fine Chemical Co., Ltd.) 633 parts by mass

[0209] YMF-02A (compound tungsten oxide containing cesium (Cs 0.33 WO 3 ), solid content 28.7% by mass, particle concentration 18.5% by mass, average particle diameter 15nm, refractive index 1.66: manufactured by Sumitomo Metal Mining Co., Ltd.) 294 parts by mass

[0210] Adek...

Embodiment 2

[0226] (Preparation of Coating Liquid 2 for Infrared Absorbing Layer)

[0227] 6.4 parts by mass of 1SX-1065 of coating solution 1 for infrared absorbing layer was changed to 2.8 parts by mass of Chelest MZ-8 (organic solvent-soluble chelating agent, pH 7.6: manufactured by Chelest Co., Ltd.) Also, the coating solution 2 for an infrared absorbing layer was prepared in the same procedure.

[0228] (Preparation of laminated film 2)

[0229] The laminated film 2 was produced in the same manner as the laminated film 1 except that the coating liquid 2 for an infrared absorbing layer was used instead of the coating liquid 1 for an infrared absorbing layer.

[0230] The film surface pH of the infrared absorbing layer of the multilayer film 2 was measured in the same manner as above, and the film surface pH was 7.5.

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Abstract

The present invention provides a laminated film having a layer containing an infrared absorber that suppresses the generation of cracks and discoloration even in a high-humidity environment exposed to sunlight and is excellent in sulfuration resistance. The present invention is a laminated film having a substrate and an infrared absorbing layer, the infrared absorbing layer containing an infrared absorbing agent, a resin, and an antioxidant, and disposed on one surface of the substrate, wherein the The film surface pH of the surface of the infrared absorbing layer opposite to the substrate is 6.5 or higher.

Description

technical field [0001] The present invention relates to a laminated film. Background technique [0002] In general, it has been theoretically proved that a laminated film obtained by adjusting the optical film thicknesses of the high-refractive-index layers and the low-refractive-index layers and alternately laminating them selectively reflects light of a specific wavelength and transmits light of a specific wavelength. A laminated film that selectively reflects visible light and near-infrared rays is used. Such a laminated film is used as a reflective film for heat ray shielding such as windows for buildings and parts for vehicles. [0003] However, in an infrared (heat ray) shielding film obtained by forming such a heat ray reflective film on the film, when productivity and optical properties are considered, it may be difficult to sufficiently shield the infrared region only by a laminated film. In view of such a problem, the transmitted light can be corrected by providi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/22B32B27/18C08J7/04G02B5/28C08J7/043C08J7/046
CPCB32B27/18G02B5/22G02B5/28C08J7/046C08J7/043
Inventor 小沼太朗久光聪史小畑裕昭川浪明土
Owner KONICA MINOLTA INC
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