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Near infrared ray reflective substrate and near infrared ray reflective laminated glass employing that substrate, near infrared ray reflective double layer glass

A near-infrared, reflective substrate technology, applied in windshields, transportation and packaging, instruments, etc., can solve problems such as difficult to use conductive films

Inactive Publication Date: 2008-10-15
CENT GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a conductive film is used, radio waves of a wide frequency band such as television, broadcasting, ETC, wireless LAN, and cellular phone are not propagated, and at present, communication systems by means of various radio waves are constructed, since it is impossible to utilize Communication systems by means of radio waves, so it is difficult to use said conductive film for windows of buildings and vehicles

Method used

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  • Near infrared ray reflective substrate and near infrared ray reflective laminated glass employing that substrate, near infrared ray reflective double layer glass
  • Near infrared ray reflective substrate and near infrared ray reflective laminated glass employing that substrate, near infrared ray reflective double layer glass
  • Near infrared ray reflective substrate and near infrared ray reflective laminated glass employing that substrate, near infrared ray reflective double layer glass

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0066] The near-infrared reflection substrate 20 shown in FIG. 1 was formed. As the transparent substrate 1 , a sheet glass 3 (see FIG. 2 ) of transparent soda-lime glass produced by a float process having a size of 1000 mm×1000 mm and a thickness of 2 mm was used.

[0067] The plate glass was washed and dried and placed in a sputtering film forming apparatus. Five layers of dielectric films were deposited on the surface to form the near-infrared reflection film 2 .

[0068] By film formation in this order from the glass surface TiO2 film (thickness: 105nm), SiO2 film (thickness: 175nm), TiO2 film (thickness: 105nm), SiO2 film (thickness: 175nm) and TiO2 film (thickness: 105 nm) to form a dielectric film constituting the near-infrared reflection film 2 . The resistance of the dielectric film stack was measured and it was almost infinite.

[0069] The visible light transmittance defined by JISR3106-1998 of the near-infrared reflective substrate was 83%. When examining the refle...

example 2

[0070] Using the near-infrared reflective substrate 20 formed in Example 1, the near-infrared reflective laminated glass shown in FIG. 2 was produced.

[0071] The near-infrared reflection film 4 is positioned on one side of the interlayer film 5. As the interlayer film 5, a PVB film having a thickness of 0.76 mm was used.

[0072] As the sheet glass 6, the same sheet glass as the sheet glass 3 used in Example 1 was used.

The near-infrared reflective substrate 20 (that is, the lamination of plate glass 3 and near-infrared reflective film 4 among Fig. 2 ), interlayer film 5 and plate glass 6 laminated together made in example 1, then Pressing / heating treatment was performed to produce a near-infrared reflective laminated glass 30 in which the near-infrared reflective substrate 20 produced in Example 1 and the sheet glass 6 were bonded together through the interlayer film 5 .

[0074] The visible light transmittance defined by JIS R3106-1998 of the near-infrared reflective lamina...

example 3

[0076] A near-infrared reflective substrate 20 shown in FIG. 1 was formed in the same manner as in Example 1 except that the near-infrared reflective film 2 was formed by a seven-layer dielectric film.

By pressing Nb2O5 film (thickness: 115nm), SiO2 film (thickness: 175nm), Nb2O5 film (thickness: 115nm), SiO2 film (thickness: 175nm), Nb2O5 film (thickness: 175nm) on the glass surface of sheet glass 1, Nb2O5 film (thickness: : 115nm), a SiO2 film (thickness: 175nm) and a Nb2O5 film (thickness: 115nm) of seven layers of dielectric film deposited in this order constitute the near-infrared reflective film 2 .

[0078] By measuring the resistance of the 7-layer dielectric film, it was confirmed that it was almost infinite, and there was no problem in propagation of electromagnetic waves, similar to Example 1.

[0079] The visible light transmittance defined by JISR3106-1998 of the near-infrared reflective substrate was 81%. When examining the reflective properties of the surface of ...

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Abstract

A near infrared ray reflective substrate having a near infrared ray reflective film formed on a transparent substrate by alternately laminating a dielectric film of low refractive index and a dielectric film of high refractive index. The substrate is characterized in that the transparent substrate is a plate glass or a polymer resin sheet exhibiting visible light transmissivity of 70% or above regulated by JIS R3106-1998 and having a maximal value of reflection exceeding 50% in the wavelength region of 900-1400 nm.

Description

Near-infrared reflective substrate, near-infrared reflective laminated glass and near-infrared reflective double-layer glass using the substrate technical field [0001] The present invention relates to a heat ray reflective substrate for reducing the temperature rise on the transmission side of a vehicle or building window caused by solar thermal radiation, and for reducing the temperature increase caused by direct solar thermal radiation on a display. temperature increases and involves laminated and double glazing using such heat ray reflective substrates. Background technique [0002] There are many constructions that limit the increase in internal temperature by reducing the heat radiation energy of sunlight that shines inside through the window glass, by limiting the power consumed by driving refrigeration equipment, and by maintaining high visible light transmittance of the window glass. A proposal for a comfortable interior. [0003] Proposed by Patent Publication 1, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/28B32B17/10B60J1/00C03C27/12
Inventor 高松敦米仓正明大本英雄中村功
Owner CENT GLASS CO LTD
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