Near-infrared reflective film and near-infrared reflector provided with same

A near-infrared, reflective film technology, used in instruments, building components, layered products, etc., can solve problems such as fracture, insufficient flexibility, and poor production efficiency, and achieve high visible light transmittance, excellent flexibility, and manufacturing. Cost-effective effect

Active Publication Date: 2013-03-27
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the method of forming a film using an ultraviolet curable resin, since the formed film is too hard, the flexibility is insufficient. In addition, in the method of forming a film using a sol, since the formed film is formed only by the aggregation of metal oxide particles And sticking, therefore, the film is brittle, it is difficult to handle and transport in the film forming stage, and the production efficiency becomes poor
Furthermore, the current situation is that when used as an interlayer film for laminated glass, cracks occur during curvature processing of the glass, and desired performance cannot be obtained sufficiently.

Method used

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  • Near-infrared reflective film and near-infrared reflector provided with same
  • Near-infrared reflective film and near-infrared reflector provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] "Fabrication of near-infrared reflective film"

[0108] [Preparation of sample 1]

[0109] (Formation of High Refractive Index Layer 1)

[0110] Disperse 100 parts of zirconia sol (Nanoyouth ZR30-AR manufactured by Nissan Chemical) as a metal oxide in a solution obtained by dissolving 5 parts of guar gum and 5 parts of polyvinyl alcohol (PVA203 manufactured by Kuraray) in 100 parts of water , to prepare high refractive index layer coating solution 1.

[0111] Next, using the high-refractive-index layer coating solution 1, the high-refractive-index layer 1 was coated on a polyethylene terephthalate film with a thickness of 50 μm using a wire bar under the condition that the dry film thickness was 135 nm. Drying is performed to form the high refractive index layer 1 .

[0112] (Formation of Low Refractive Index Layer 1)

[0113] 100 parts of colloidal silica (Snowtex OS manufactured by Nissan Chemical) as a metal oxide is dispersed in a solution of 12 parts of polyvinyl...

Embodiment 2

[0201] [Production of near-infrared reflector 1]

[0202] The near-infrared reflector 1 was produced using the near-infrared reflective film of sample 8 produced in Example 1. The near-infrared reflective film of sample 8 was bonded to a transparent acrylic resin plate with a thickness of 5 mm and 20 cm×20 cm with an acrylic adhesive to produce a near-infrared reflector 1 .

[0203] [Production of near-infrared reflector 2]

[0204] The near-infrared reflector 2 was produced using the near-infrared reflective film of sample 8 described in Example 1. Two sheets of plate glass with a thickness of 2 mm and 20 cm x 20 cm were prepared, and a laminate in which polyvinyl butyral with a thickness of 0.5 mm was arranged on both sides of the near-infrared reflective film of Sample 8 was sandwiched between the two sheets of glass and Pressurization and heat treatment were performed to manufacture the near-infrared reflector 2 as laminated glass.

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Abstract

The present invention provides a near-infrared reflective film and a near-infrared reflector provided with the same, which provide excellent manufacturing cost performance, can be used over large areas, exhibit excellent flexibility, and have high visible light transmittance. The near-infrared reflector is characterized in that, in an infrared film in which high refractive index layers and low refractive index layers are alternately laminated on a support body, the refractive index difference between adjacent high refractive index layers and low refractive index layers is at least 0.3, and at least one of the high refractive index layers and low refractive index layers contains a metal oxide and a polysaccharide thickener.

Description

technical field [0001] The present invention relates to a low-cost near-infrared reflective film that can be enlarged in area and has excellent optical characteristics and film physical properties, and a near-infrared reflective body provided with the near-infrared reflective film. Background technique [0002] In recent years, with increasing interest in energy saving, from the viewpoint of reducing the load on air-conditioning equipment, there is a demand for near-infrared reflective films that block the transmission of heat rays from sunlight by installing them on window glass of buildings and vehicles. improve. [0003] Conventionally, as a near-infrared reflective film, a method of producing a laminated film in which high-refractive-index layers and low-refractive-index layers are alternately laminated by dry film-forming methods such as vapor deposition and sputtering has been proposed. However, the dry film forming method has the following problems: the production co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/26B32B7/02B32B27/18G02B5/08G02B5/28
CPCB32B27/18B32B27/30B32B27/306B32B7/02B32B2605/006G02B5/0841G02B5/26B32B2419/00G02B5/282G02B5/287
Inventor 铃木伸一荒井健夫
Owner KONICA MINOLTA INC
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