JPS63277537A - Glass for automobile - Google Patents

Abstract

PURPOSE:To obtain glass for automobiles, having low air cooling load because of low solar radiation heat transmission, high light transmittance, excellent material discriminating properties owing to high main wavelength and low irritation purity, containing a coloring component consisting of an iron oxide, cobalt oxide and Se in specific weight ratio. CONSTITUTION:Raw materials are blended in such a way that glass containing a coloring component consisting of 0.1-0.2wt.% calculated as Fe2O3 of an iron oxide, 0.001-0.003wt.% calculated as CoO of cobalt oxide and 0.0001-0.0008wt.% Se. Then raw materials are blended in such a way that glass having >=70% light transmittance calculated as 5m/m plate thickness of optical characteristic value by transmission of A light source, <=72% solar radiation heat transmission, <=1% irritation purity and >=570nm main wave length. Then the blended raw materials are heated, melted, made into glass and molded into a laminar shape to give the aimed glass for automobiles.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to nine-shoulder glasses.

[Prior Art] Japanese Patent Publication No. 58-13504 discloses a bronze-colored glass for vehicles that has excellent heat ray absorption performance and light transmittance.

This glass has Fe2O30.2~0.5 as a coloring component.
%, Goo 20ppm or less, Se 5-25ppa+
Contains. In addition, its optical properties include a light transmittance of 70% or more, an excitation purity of 2 to 6%, and a dominant wavelength of 570 to 50%.
It has 801 layers.

However, such glasses have a high irritant purity;
There has been a problem in that drivers are unable to sufficiently distinguish objects with colors in the short wavelength range, such as blue. Furthermore, since the stimulus purity is high, there is a problem in that the color tone of the body that harmonizes with it is limited to a specific one.

On the other hand, in Japanese Patent Publication No. 52-49010.

Coloring components: Fe2O30.1-0.5%, Co00
．． 003-0.02%, Sa 0.0005-0.00
Contains 1%, Ni00~0.002, light transmittance 57~63% in terms of 5mm thickness, solar radiation 8 transmittance 57~6
3%, excitation purity of less than 1.5%.

However, such glasses have a high content of Coo;
Since the light transmittance is low, there is a problem in that the ability to identify objects is not sufficient.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned problems that the conventional glass had, and has optical properties that have excellent heat ray absorption performance and can sufficiently distinguish objects of color tones in the entire wavelength range. Our goal is to provide vehicle glass that harmonizes with any color of vehicle body.

[Means for Solving the Problems] The present invention is based on iron oxide expressed as F11203 expressed in weight % of 0.1 to 0.
Cobalt oxide converted to 2KCoo o, ooi ~ 0.
003 Se O,0001~0.0
Contains a coloring component consisting of $0.008, and the optical characteristic value due to transmission of light source A is converted into a plate thickness of 5 s/m.

The present invention provides a vehicle glass having a light transmittance of 70% or more, a solar radiation heat transmittance of 72% or less, an excitation purity of 1% or less, and a dominant wavelength of 570 na+ or more.

Among the coloring components in the present invention, iron oxide is a component that improves infrared rays, that is, solar radiation heat absorption characteristics. If the content of iron oxide is less than 0.1%, the solar radiant heat absorption properties will be insufficient and the load on indoor cooling will increase, which is undesirable.
If it exceeds 0.1%, it becomes greenish and the distinguishability of objects in the long wavelength range decreases, which is undesirable, and more preferably 0.1%.
It is in the range of 1 to 0.18%. In addition, iron oxide is usually 20
~30% is FeO contained in the glass.

Cobalt oxide is a component that has a nearly complementary color relationship with Se, and S
It acts to prevent the increase in stimulus purity caused by e. Therefore, if the content of cobalt oxide is less than 0.001, the stimulus purity becomes large in the long wavelength region, which is not preferable (,0,003
If it exceeds 0.0%, the stimulus purity increases in the short wavelength region and the light transmittance decreases, resulting in a decrease in object identifiability, which is undesirable.More preferably, it is in the range of 0.002 to 0.003%.

If the Se content is less than 0.0001%, the stimulus purity in the short wavelength range will increase, which is undesirable. If it exceeds 0.0008%, the stimulus purity will decrease in the long wavelength range, and the light transmittance will decrease, making the object It is not preferable because the distinguishability of the content decreases, and more preferably it is in the range of 0.0004 to 0.0008%.

On the other hand, as for the optical properties, the values measured using transmitted light from light source A are converted into a plate thickness of 5 cm/plate.

Light transmittance 70% or more Solar radiation heat transmittance 72% or less Stimulus purity: 1% or less Main wavelength: 5701 or more layers.

If this light transmittance is less than 70, it is undesirable because the distinguishability of objects through the glass decreases.The higher the light transmittance, the more distinguishable objects are, but the solar radiation heat transmittance increases and the cooling load increases. Therefore, a range of 70 to 78% is preferable.

If the solar radiation 8 transmittance exceeds 72%, the cooling load will increase, which is undesirable.On the other hand, if the solar radiation heat transmittance is too small, the light transmittance will become small and the distinguishability of objects will decrease, so it is not desirable. It is preferably in the range of 87 to 72%. If the stimulus purity exceeds 1%, it is undesirable as it reduces the distinguishability of objects and limits the color tone of the harmonious body.On the other hand, if the stimulus purity becomes too small, the solar radiation heat transmittance increases and the cooling load increases. Therefore, it is not preferable, and it is preferably in the range of 0.1-1%,
Particularly preferably, it is 0.2 to 0.8%.

If the dominant wavelength is less than 570 nm, the light transmittance will decrease and the object identification will deteriorate, which is not preferable.

On the other hand, if the dominant wavelength becomes too long, the distinguishability of objects in the short wavelength region decreases, so the preferred dominant wavelength is 570~1
The range is 350 nm, and the range of 582 to 810 nm is particularly desirable.

When applying the glass of the present invention to vehicles, examples include a single sheet, a so-called laminated glass in which multiple glass sheets are bonded together via an interlayer film such as polyvinyl butyral, and a glass sheet in which a urethane resin layer is provided on one side of the glass sheet. used in the form of

As this inner laminated glass, glass according to the present invention may be used on both sides, or ordinary transparent glass may be used on one side, and the plate thickness is 5.5 mm when used as a single plate.
A type of laminated glass with a urethane resin layer on one side is preferable in terms of light transmittance.
It is preferable to select the thickness of the glass so that the light transmittance is 70% or more.

The main component of the glass in the present invention is not particularly limited, and a wide range of components can be used. Among them, Na2O-5i02
-CaO type materials are particularly preferred because float molding is easy.

Examples Each raw material was prepared by a conventional method, heated to 1450 to 1550°C, melted, and vitrified.Then, this molten glass was molded into a plate glass by a float method. This glass has a weight percentage of S+0272.5%.

A 12031, 5%, Ca08%, Mg04%
, Generation 2 consisting of 5030.2%, R2013.8%
per minute, as coloring components Fe2O30.14%, Co
00.0024% and Se 0.0007%.

The optical properties of the molded glass were measured using transmitted light from a light source, and the results were as follows for a plate thickness of 5 Mars.

Light transmittance: 72.6% Solar radiation heat transmittance: 70.2% Excitation purity: 0.6% Dominant wavelength: 584 ns In addition, the spectral transmittance of this glass (plate thickness: 3.f3 m/m) is shown in Figure 1. As shown, the glass according to the present invention has a low solar radiation heat transmittance, a high light transmittance, and a low stimulation purity.

[Effects of the Invention] According to the present invention, since the solar radiation heat transmittance is low, the cooling load is reduced, and because the light transmittance is high and the dominant wavelength is 570 nm or more, object identification is excellent. Moreover, since the irritation purity is low, it harmonizes with any body color tone and does not limit the color tone of the body, making it an excellent glass for vehicles.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the spectral transmittance of the glass according to the present invention.

Claims (2)

[Claims] (1) Iron oxide 0.1-0.2%C converted to Fe_2O_3 in weight%
Cobalt oxide converted to oO 0.001-0.003
Contains a coloring component consisting of %Se 0.0001 to 0.0008%, and the optical property value by transmission of light source A is converted to a plate thickness of 5 m/m, and the light transmittance is 70% or more and the solar radiation heat transmittance is 72% or less. Vehicle glass with a purity of 1% or less and a dominant wavelength of 570 nm or more. (2) The glass according to claim 1, wherein the dominant wavelength is 582 nm or more.