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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 laminated film is difficult to shield the infrared region

Active Publication Date: 2017-08-01
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
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Effect test

preparation example Construction

[0096] The method for preparing the coating liquid for an infrared absorbing layer is not particularly limited as long as a specific film surface pH 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 optionally a surfactant 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 adding each component is not particularly limited, and each component may be added and mixed sequentially while stirring, or may be added and mixed at once while stirring.

[0097] As far as pH adjustment is concerned, as long as any acidic or alkaline pH adjusting agent is used, for example, in the case of an aqueous solvent, it is possible to add a base such as sodium carbonate or sodium hydroxide to the coating liquid for the infrared absorbing layer. And / or ac...

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

[Problem] To provide a laminated film having a layer that contains an infrared absorbent, wherein cracking and discoloration under highly humid environments subjected to the sun's rays are minimized, and having excellent resistance to sulfurization. [Solution] The present invention pertains to a laminated film comprising a substrate, and an infrared light absorbing layer that is disposed on one surface of the substrate and contains an infrared light absorbing agent, a resin and a sulfurization prevention agent; and having a film surface pH on the front surface on the opposite side of the infrared light absorbing layer to the substrate of at least 6.5.

Description

technical field [0001] The present invention relates to a laminated film. Background technique [0002] In general, it has been proved theoretically that a laminated film obtained by adjusting the optical film thicknesses of high-refractive-index layers and low-refractive-index layers and alternately stacking them selectively reflects light of a specific wavelength as a transmissive material. Visible rays and laminated films that selectively reflect near-infrared rays are used. Such a laminated film is used as a reflective film for heat ray shielding for windows of buildings and parts for vehicles. [0003] However, in an infrared (heat ray) shielding film obtained by forming such a heat ray reflecting 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. To solve such a problem, by providing a layer mixed with an infrared absorbing agent having infrared absorb...

Claims

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Application Information

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Patent Type & Authority Applications(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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