KR20200063089A - Functional building material including low-emissivity coat for windows - Google Patents

Abstract

Provided is a functional building material for windows, comprising: a transparent substrate; and a low-radiation coating which is formed on one surface of the transparent substrate. The low-radiation coating includes a first dielectric layer, a second dielectric layer, a third dielectric layer, a first low-radiation protection layer, a low-radiation layer, a second low-radiation protection layer, a fourth dielectric layer, a fifth dielectric layer, and a sixth dielectric layer, which are successively laminated from the transparent substrate. An auxiliary low-radiation protection layer is included in at least one of the portion between the first low-radiation protection layer and the low-radiation layer and the portion between the low-radiation layer and the second low-radiation protection layer. The auxiliary low-radiation protection layer, the first low-radiation protection layer, and the second low-radiation protection layer include metal or alloy selected from a group made of Ni, Ti, Nb, Cr, Al, Zn, Mo, and combinations of the same. The refractive index of the first dielectric layer and the refractive index of the third dielectric layer are lower than the refractive index of the second dielectric layer, respectively. The refractive index of the fourth dielectric layer and the refractive index of the sixth dielectric layer are lower than the refractive index of the fifth dielectric layer, respectively. The functional building material for windows improves insulation performance, wear resistance, and storage performance and realizes a high visible ray transmittance.

Description

Functional building materials for windows and doors{FUNCTIONAL BUILDING MATERIAL INCLUDING LOW-EMISSIVITY COAT FOR WINDOWS}

The present invention relates to a functional building material for windows and doors.

Low-emissivity glass (Low-Emissivity glass) refers to a glass in which a low-emission layer containing a metal having a high reflectivity in the infrared region such as silver (Ag) is deposited as a thin film. The low-emission glass is a functional material that reflects radiation in the infrared region to block solar radiation outdoors in the summer and to preserve indoor heating radiation in the winter, thereby saving energy in buildings.

In general, silver (Ag) used as a low-emission layer is oxidized when exposed to air, and a dielectric layer is deposited as an anti-oxidation film on the top and bottom of the low-emission layer. The dielectric layer also serves to increase the visible light transmittance.

An object of the present invention is to provide a functional building material for windows and doors with improved insulation performance, abrasion resistance, storage performance, and realization of high visible light transmittance.

It is also an object of the present invention to provide a functional building material for windows and doors with little change in optical performance before and after the tempering treatment.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

In one embodiment of the present invention, a transparent substrate and a low-emission coating formed on one surface of the transparent substrate, the low-emission coating, sequentially stacked from the transparent substrate: a first dielectric layer, a second dielectric layer, a third A dielectric layer, a first low-emission protective layer, a low-emission layer, a second low-emission protective layer, a fourth dielectric layer, a fifth dielectric layer, and a sixth dielectric layer, including between the first low-emission protective layer and the low-emission layer At least one of the between the radiation layer and the second low-emission protective layer includes an auxiliary low-emission protective layer, wherein the auxiliary low-emission protective layer, the first low-emission protective layer and the second low-emission protective layer include Ni, Ti, And a metal or alloy selected from the group consisting of Nb, Cr, Al, Zn, Mo, and combinations thereof, wherein the refractive index of the first dielectric layer and the refractive index of the third dielectric layer are lower than the refractive index of the second dielectric layer, respectively. The refractive index of the fourth dielectric layer and the refractive index of the sixth dielectric layer each provide a functional building material for windows that is lower than the refractive index of the fifth dielectric layer.

The functional building material for windows and doors according to the present invention has improved thermal insulation performance, abrasion resistance, and storage performance, realizes high visible light transmittance, and changes in optical performance before and after strengthening treatment are small.

In addition to the above-described effects, the concrete effects of the present invention will be described together while describing the specific matters for carrying out the invention.

1 schematically shows a cross-section of a functional building material for windows and doors according to an embodiment of the present invention.
Figure 2 schematically shows a cross-section of a functional building material for windows and doors according to an embodiment of the present invention.
Figure 3 schematically shows a cross-section of a functional building material for windows and doors according to an embodiment of the present invention.

The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, and accordingly, a person skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. In the description of the present invention, when it is determined that detailed descriptions of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, detailed descriptions will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

In the following, the arrangement of any component in the "upper (or lower)" or "upper (or lower)" of the component means that the arbitrary component is disposed in contact with the upper surface (or lower surface) of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Also, when a component is described as being "connected", "coupled" or "connected" to another component, the components may be directly connected to or connected to each other, but other components may be "interposed" between each component. It should be understood that "or, each component may be "connected", "coupled" or "connected" through other components.

Hereinafter, a functional building material for windows and doors according to some embodiments of the present invention will be described.

In one embodiment of the present invention, there is provided a functional building material for windows and doors comprising a transparent substrate and a low-emission coating formed on one surface of the transparent substrate.

1 is a cross-sectional view showing a functional building material 100 for windows and doors according to an embodiment of the present invention.

The low-emission coating 11 is sequentially stacked from the transparent substrate 10: a first dielectric layer 15a, a second dielectric layer 15b, a third dielectric layer 15c, and a first low-emission protective layer 14a ), the low-emission layer 12, the second low-emission protective layer 14b, the fourth dielectric layer 15d, the fifth dielectric layer 15e, and the sixth dielectric layer 15f.

Between the first low-emission protective layer 14a and the low-emission layer 12; And between the low emission layer 12 and the second low emission protection layer 14b; The auxiliary low-emission protective layers 13a and 13b are included in at least one of them.

In one embodiment, the auxiliary low-emission protective layer 13a may be included between the first low-emission protective layer 14a and the low-emission layer 12.

In one embodiment, the auxiliary low-emission protective layer 13b may be included between the low-emission layer 12 and the second low-emission protective layer 14b.

In one embodiment, between the first low-emission protective layer 14a and the low-emission layer 12 includes an auxiliary low-emission protective layer 13a (a first auxiliary low-emission protective layer), and the low-emission layer 12 ) And the second low-emission protective layer 14b may include an auxiliary low-emission protective layer 13b (a second auxiliary low-emission protective layer).

Hereinafter, the auxiliary low-emission protective layers 13a and 13b include an auxiliary low-emission protective layer 13a between the first low-emission protective layer 14a and the low-emission layer 12; And an auxiliary low-emission protective layer 13b between the low-emission layer 12 and the second low-emission protective layer 14b; It means at least one of them.

The auxiliary low-emission protective layers (13a, 13b), the first low-emission protective layer (14a) and the second low-emission protective layer (14b) are Ni, Ti, Nb, Cr, Al, Zn, Mo, and combinations thereof. Metals or alloys selected from the group consisting of.

The refractive index of the first dielectric layer 15a and the refractive index of the third dielectric layer 15c are lower than the refractive index of the second dielectric layer 15b, respectively, and the refractive index of the fourth dielectric layer 15d and the sixth dielectric layer 15f The refractive indexes of each are lower than the refractive indexes of the fifth dielectric layer 15e.

The low-emission coating 11 may be formed as shown in FIG. 1 in a multi-layer thin film structure based on the low-emission layer 12 that selectively reflects far infrared rays among solar radiation, and lower the emissivity to reduce the low-emission coating (11) To the low emissivity, that is, low (e-low emissivity) gives excellent thermal insulation performance by the effect.

The low-emission coating (11) is formed in the structure as described above, for example, when applied as a coating film of a window glass, by reflecting the solar radiation of the outdoors in the summer and preserving the radiant heat of the indoor heat in winter, the movement of heat between indoor and outdoor It is a functional material that minimizes and brings energy savings to buildings.

'Emissivity' refers to the rate at which an object absorbs, transmits, and reflects energy having an arbitrary specific wavelength. That is, in this specification, the emissivity refers to the degree of absorption of infrared energy in the infrared wavelength region, specifically, when a far infrared ray corresponding to a wavelength region of about 5 μm to about 50 μm exhibiting strong thermal action is applied, it is applied. It means the ratio of infrared energy absorbed to infrared energy.

According to Kirchhoff's law, the infrared energy absorbed by an object is the same as the infrared energy emitted by the object again, so the absorption and emissivity of the object are the same.

In addition, since the infrared energy that is not absorbed is reflected from the surface of the object, the higher the reflectance for the infrared energy of the object, the lower the emissivity. Expressed numerically, there is a relationship of (emissivity = 1-infrared reflectance).

Such emissivity can be measured by various methods commonly known in the art, and can be measured by equipment such as a Fourier transform infrared spectroscopy (FT-IR) according to the KSL2514 standard.

Absorption rate, that is, emissivity for far-infrared rays exhibiting such strong thermal action of any object, for example, low-emission glass, may represent a very important meaning in measuring insulation performance.

The low-emission coating 11 is applied to the transparent substrate 10 as a coating film, and maintains a predetermined transmission characteristic in the visible light region to realize excellent light-resistance, while lowering the emissivity in the infrared region to provide an excellent thermal insulation effect. It is possible to realize functional building materials for energy-saving windows that can be done. These functional building materials for windows and doors are also called'Roy Glass'.

The low-emission layer 12 is a layer formed of an electrically conductive material that can have a low emissivity, for example, a metal, that is, has a low sheet resistance and thus has a low emissivity. For example, the low-emissivity layer 12 may have an emissivity of about 0.01 to about 0.3, specifically about 0.01 to about 0.2, more specifically about 0.01 to about 0.1, and more specifically About 0.01 to about 0.08.

The low-emissivity layer 12 of the emissivity range can simultaneously implement excellent light and heat insulation effects by appropriately controlling visible light transmittance and infrared emissivity. The low-emissivity layer 12 having the above emissivity may have, for example, a sheet resistance of a material composed of a thin film of about 0.78 mm 2 /sq to about 6.42 mm 2 /sq, but is not limited thereto.

The low-emission layer 12 performs a function of selectively transmitting and reflecting solar radiation, and specifically, has a low emissivity due to high reflectance of radiation in the infrared region. The low-emission layer 12 may include at least one selected from the group comprising Ag, Au, Cu, Al, Pt, ion-doped metal oxides, and combinations thereof, and is not limited thereto, and has low-emission performance. Metals known to be embodied can be used without limitation. The ion-doped metal oxide includes, for example, indium tin oxide (ITO), fluorine-doped tin oxide (FTO), Al-doped zinc oxide (AZO), gallium zinc oxide (GZO), and the like. In one embodiment, the low-emission layer 12 may be a layer formed of silver (Ag), and as a result, the low-emission coating 11 may realize high electrical conductivity, low absorption in the visible light region, durability, and the like. have.

The thickness of the low-emission layer 12 may be, for example, about 5 nm to about 25 nm. The low-emission layer 12 having a thickness in the above range is suitable for simultaneously realizing a low infrared emissivity and a high visible light transmittance.

Low-emission glass, such as a glass on which the low-emission coating 11 including the low-emission layer 12 is formed, is in contact with a caustic such as oxygen, chloride, sulfide, sulfur dioxide, etc. in the atmosphere in a high temperature and high humidity environment. Corrosion occurs in 12), and the coating film of the low-emission coating 11 is liable to be damaged. In addition, such a low-emission glass is liable to frequently damage the coating film of the low-emission coating 11 by scratches during transportation or handling.

In addition to the low-emissivity layer 12, the low-emission coating 11 is provided with low-emission protective layers 14a, 14b, auxiliary low-emission protective layers 13a, 13b, and dielectric layers 15a, 15b, 15c, 15d, 15e, 15f. ) Is formed in a multi-layer structure, thereby effectively protecting the low-emissivity layer 12, and solving these shortcomings.

The auxiliary low-emission protective layer (13a, 13b), the first low-emission protective layer (14a) and the second low-emission protective layer (14b) is made of a metal (or alloy) having excellent light absorption performance to control sunlight And, by adjusting the material, thickness, etc., it is possible to adjust the color implemented by the low-emission coating (11).

In one embodiment, the auxiliary low-emission protective layer (13a, 13b), the first low-emission protective layer (14a) and the second low-emission protective layer (14b) has an extinction coefficient (extinction coefficient) in the visible region 1.5 to about 3.5. The extinction coefficient is a value derived from an optical constant, which is an intrinsic property of the material of the material, and the optical constant is expressed by n-ik as a formula. In this case, the real part n is the refractive index, and the imaginary part k is called the extinction coefficient (also called absorption coefficient, extinction coefficient, extinction coefficient, etc.). The extinction coefficient is a function of the wavelength (λ), and in the case of metal, the extinction coefficient is generally greater than zero. The extinction coefficient, k is the absorption coefficient, α and α=(4πk)/λ, and the absorption coefficient, α is the relationship of I=I0exp(-αd) when the thickness of the medium through which light passes is d. Due to absorption of light by the medium, the intensity (I) of light passing through is reduced compared to the intensity (I0) of incident light.

The auxiliary low-emission protection layers 13a, 13b, the first low-emission protection layer 14a, and the second low-emission protection layer 14b are made of metal having the extinction coefficient of the visible light region in the above range. By absorbing a certain portion, the low-emissivity coating 11 has a predetermined color.

The low-emission coating 11 has a structure in which two-layer protective layers of the low-emission protective layers 14a and 14b and the auxiliary low-emission protective layers 13a and 13b are formed on both sides of the low-emission layer 12, respectively. As a result, it is possible to ensure the insulation performance, abrasion resistance, storage performance, and high visible light transmittance of the functional building material 100 for windows and doors. As shown in FIG. 1, the low-emission protective layers 14a, 14b and the auxiliary low-emission protective layers 13a, 13b may be formed by continuously contacting.

In addition, the functional building material 100 for windows and doors formed of such a structure has a low change in optical performance, such as transmittance and color, even if it is strengthened by heat treatment. In the case of an existing strengthened product, the optical performance of the low-emission coating before the strengthening treatment should be designed in consideration of changes in advance, since the optical performance changes after the strengthening treatment. Since the product released without the strengthening treatment does not need to take into account any change in the strengthening treatment, there is a inconvenience in that it has to be manufactured separately from the product designed in consideration of the change in optical performance during the strengthening treatment. Since the functional building material 100 for windows and doors does not have a large change in optical performance during reinforcement treatment, it is possible to manufacture a product that is released without reinforcement treatment and a product designed in consideration of the change in optical performance during reinforcement treatment without distinction. There is an advantage.

In one embodiment, the first low-emission protective layer (14a) and the second low-emission protective layer (14b) is a metal or alloy selected from the group consisting of Ni, Cr, Ni and Cr alloys and combinations thereof It may include, but is not limited to. Combinations of the metals exemplified above refer to the alloy form. Specifically, the first low-emission protective layer 14a and the second low-emission protective layer 14b may include alloys of 40 to 90 wt% Ni and 10 to 60 wt% Cr, respectively.

In one embodiment, the auxiliary low-emission protective layer (13a, 13b) may include a metal or alloy selected from the group consisting of Ni, Ti, Nb, Cr, Al, Zn, Mo and combinations thereof.

In one embodiment, the auxiliary low-emission protective layer (13a, 13b) may include an alloy of Ni, Ti and Nb. Specifically, the auxiliary low-emission protective layers 13a and 13b may include 10 to 50 wt% Ni and 40 to 85 wt% Ti and 5 to 40 wt% Nb alloy, respectively. Through the application of the alloy, it is possible to improve the optical performance and thermal insulation performance, and it is possible to play a role of reducing transmittance and color change before and after strengthening.

The first low-emissive protective layer 14a and the second low-emissive protective layer 14b may each have a thickness of about 0.5 nm to about 2 nm, but are not limited thereto, and may be appropriately changed according to the application. The low-emission coating (11) protects the low-emission layer (12) by forming the low-emission protective layers (14a, 14b) in the thickness range, respectively, and performs a role of lowering thermal performance, durability, and changes in optical performance before and after strengthening While it is suitable for adjusting to have a predetermined transmittance and reflectance.

The auxiliary low-emission protective layer (13a, 13b) may be a thickness of about 0.5nm to about 2nm, but is not limited thereto, and may be appropriately changed according to the application. The low-emission coating 11 protects the low-emission layer 12 by forming the auxiliary low-emission protective layers 13a and 13b in the thickness range, respectively, and serves to lower thermal insulation performance, durability, and changes in optical performance before and after reinforcement. It is suitable for adjusting to have a predetermined transmittance and reflectance while performing.

In one embodiment, the thickness of the first low-emission protective layer 14a and the second low-emission protective layer 14b may be about 0.5 nm to about 4 nm, respectively.

In one embodiment, the thickness of the auxiliary low-emission protective layer (13a, 13b) may be from about 0.5 nm to about 4 nm.

The low-emissivity coating 11 protects the low-emission layer 12 more effectively by setting the thickness ratio between the low-emission protection layer and the auxiliary low-emission protection layer as described above, thereby lowering thermal insulation performance, durability, and changes in optical performance before and after strengthening. While performing a role, it is easy to adjust to have a predetermined transmittance and reflectance.

Refractive indices of the first dielectric layer 15a, the third dielectric layer 15c, the fourth dielectric layer 15d, and the sixth dielectric layer 15f may be about 2.2 or less, and specifically, about 1.8 to about 2.2.

In one embodiment, the first dielectric layer 15a, the third dielectric layer 15c, the fourth dielectric layer 15d and the sixth dielectric layer 15f are each a metal of Si, Al, Zn or Sn, at least of the metal From the group consisting of a composite metal containing two types, an oxide of the metal, a nitride of the metal, an oxynitride of the metal, an oxide of the composite metal, a nitride of the composite metal, an oxynitride of the composite metal, and combinations thereof It may include a selected one.

In one embodiment, the first dielectric layer 15a, the third dielectric layer 15c, the fourth dielectric layer 15d and the sixth dielectric layer 15f may each include silicon aluminum nitride.

The silicon aluminum nitride can well implement a refractive index of about 2.2 or less, and at the same time, can exhibit excellent durability.

The first dielectric layer 15a, the third dielectric layer 15c, the fourth dielectric layer 15d and the sixth dielectric layer 15f have, for example, a weight ratio of Si:Al of about 85-95 parts by weight: 5~ It can be produced as a silicon nitride aluminum layer by depositing using a sputtering device in a nitrogen atmosphere using a target of 15 parts by weight. At this time, the refractive index may be adjusted according to the nitrogen content ratio, and specifically, the smaller the nitrogen content, the lower the refractive index, and the higher the content, the higher the refractive index. Specifically, by controlling the nitrogen content, a layer of silicon aluminum nitride having a refractive index of about 1.8 to about 2.2 can be prepared.

The functional building material 100 for windows and doors can exhibit excellent durability because it includes at least four or more layers including silicon aluminum nitride.

Refractive indices of the second dielectric layer 15b and the fifth dielectric layer 15e are about 2.3 or more, respectively, and may be about 2.3 to about 2.5.

In another embodiment, the second dielectric layer 15b and the fifth dielectric layer 15e may each include one oxide, oxynitride, or both selected from the group consisting of Ti, Zr, Nb, Ta, and combinations thereof. have. The combination of Ti, Zr, Nb, and Ta means an alloy of two or more metals.

Specifically, the second dielectric layer 15b and the fifth dielectric layer 15e may each include one oxide selected from the group consisting of titanium, zirconium, tantalum, and combinations thereof. Specifically, each of the second dielectric layer 15b and the fifth dielectric layer 15e includes TiOx; ZrOx; TaOx; Or one oxide selected from the group consisting of at least two or more alloys of Ti, Zr, and Ta; and may include about 1.5≤x≤2.0, specifically, about 1.6≤x≤1.9.

The materials exemplified above may well implement a refractive index of about 2.3 or more, and at the same time, exhibit excellent durability.

Since the metal used as the low-emission layer 12 is generally well oxidized, the first dielectric layer 15a to the sixth dielectric layer 15f can act as an antioxidant film for the low-emission layer 12, In addition, the first dielectric layer 15a to the sixth dielectric layer 15f also serve to increase the visible light transmittance. In addition, the first dielectric layer 15a to the sixth dielectric layer 15f improve the optical performance of the low-emissivity coating 11.

The optical performance may be variously implemented by adjusting each thickness of the first dielectric layer 15a to the sixth dielectric layer 15f. Specifically, the thickness of each layer of each of the dielectric layers may be about 5 nm to about 30 nm, respectively, and the sum of the total thicknesses of the first dielectric layer 15a to the sixth dielectric layer 15f is about 30 nm to about It may be 120nm.

In the low-emission coating 11, the first dielectric layer 15a to the third dielectric layer 15c and the fourth dielectric layer 15d to the sixth dielectric layer 15f are structures in which a low refractive layer, a high refractive layer, and a low refractive layer are repeated. To form. By forming a structure in which the low-refractive layer and the high-refractive layer repeatedly cross, the optical performance required for low-emission glass such as transmittance, reflectance, and color index is greatly improved.

The low-emissivity coating 11 has a low-refractive-layer, a high-refractive-layer and a low-refractive-layer structure of a multi-layered dielectric layer structure in which the low-refractive-layer is repeated on both sides of the low-emission layer 12, as described above. A two-layer protective layer (i.e., a low-emissive protective layer and an auxiliary low-emissive protective layer) is formed together with a structure formed on both sides, effectively improving the thermal insulation performance, abrasion resistance, and storage performance of the functional building material 100 for windows and doors. And, it is possible to ensure a high visible light transmittance, and the change in optical performance before and after the strengthening process is not large.

In the functional building material 100 for windows and doors, the low-emission coating 11 may further include an uppermost protective layer 16 on the sixth dielectric layer 15f.

2 is a cross-sectional view showing a functional building material 200 for windows and doors according to another embodiment of the present invention. In the above-described functional building material 200 for windows and doors, an uppermost protective layer 16 is laminated on the sixth dielectric layer 15f in the above-described structure.

The uppermost protective layer 16 is a layer exposed to the outermost layer, and may include a zirconium-based compound.

Specifically, the uppermost protective layer 16 includes at least one selected from the group consisting of metal oxides, metal nitrides, metal oxynitrides, and combinations thereof, or in the at least one, bismuth (Bi), boron (B) , Aluminum (Al), silicon (Si), magnesium (Mg), antimony (Sb), beryllium (Be), and at least one element selected from the group consisting of a doped material. The metal may be Si, Zr, Ti, Nb, Sn, Zn, Al, Bi, Ni, Cr, etc., but is not limited thereto.

The uppermost protective layer 16 may implement excellent optical performance together with the first dielectric layer 15a to the sixth dielectric layer 15f.

The low-emission coating 11 is a layer corresponding to the first dielectric layer 15a, the second dielectric layer 15b, and the fifth dielectric layer 15e, and has a refractive index of about 2.3 or more, specifically about 2.3 to about 2.5 Phosphorus additional high refractive layer; and layers corresponding to the third dielectric layer 15c, the fourth dielectric layer 15d and the sixth dielectric layer 15f, wherein the refractive index is about 2.2 or less, specifically about 1.8 to about 2.2 The low refractive layer may be further included as a pair.

The additional high-refractive layer and the additional low-refractive layer are paired so that the additional high-refractive layer and the additional low-refractive layer are sequentially on top of the third dielectric layer 15c and/or on the sixth dielectric layer 15f. A pair may be further layered and included.

In addition, the additional high-refractive layer and the additional low-refractive layer are paired so that the additional high-refractive layer and the additional low-refractive layer are on top of the third dielectric layer 15c and/or on the top of the sixth dielectric layer 15f. In order, two pairs may be further stacked and included.

That is, the additional high-refractive layer and the additional low-refractive layer are between the third dielectric layer 15c and the first low-emission protective layer 13a, on top of the sixth dielectric layer 15f, or the sixth dielectric layer 15f ) May be located between the upper and upper protective layers 16.

As the pair of additional high-refractive layers and additional low-refractive layers are repeatedly stacked, optical performance such as transmittance is improved, but there is a fear of increasing the unit price, so it can be adjusted according to the application.

3 shows a functional building material 300 for windows and doors further comprising the additional high refractive layer and the additional low refractive layer.

In FIG. 3, the functional building material 300 for windows and doors is a pair of the additional high refractive layer 17a and the additional low refractive layer 18a, and the additional high refractive layer 17b and the additional low refractive layer 18b Includes another pair of.

The low-emissivity coating 11 may further include an additional layer other than the above-described structure in order to realize a predetermined optical performance.

The transparent substrate 10 may be a transparent substrate having a high visible light transmittance, for example, a glass or a transparent plastic substrate having a visible light transmittance of about 80% to about 100%. The transparent substrate 10, for example, the glass used for construction may be used without limitation, for example, may be a thickness of about 2mm to about 12mm, may vary depending on the purpose and function of use, and It is not limited.

In order to manufacture the functional building material for windows and doors, first, a transparent substrate 10 is prepared, and then each layer of the low-emission coating 11 may be sequentially formed. Each layer of the low-emission coating 11 can be formed according to a known method in a manner suitable for realizing the desired physical properties.

The functional building material for windows and doors of the present invention can be strengthened through heat treatment for a low-emission coating of a multi-layer structure coated on a transparent glass substrate. The functional building material for windows and doors of the present invention can be mixed with functional building materials for windows and doors before and after reinforcing because the color difference between before and after reinforcing is hardly felt by the naked eye because there is no color difference before and after reinforcing by heat treatment. Compared to the case where color difference appears and mixing is not possible, it has better productivity and distribution.

Specifically, the ΔE* _ab value before and after strengthening by heat treatment of the functional building material for windows and doors of the present invention is 3 or less, preferably 1 to 3. When the ΔE* _ab value is 3 or less, the color difference cannot be recognized with the naked eye, and thus there is an advantage in that products can be mixed before and after reinforcement.

[Delta]E* _ab representing the color difference between before and after reinforcing by heat treatment of the functional building material for windows and doors of the present invention can be obtained by the following equation 1.

[Equation 1]

ΔE* _ab = [(L ₁ *-L ₂ *) ² + (a ₁ *-a ₂ *) ² + (b ₁ *-b ₂ *) ² ] ^1/2

The L ₁ *, a ₁ *, and b ₁ * are L*a*b* values before strengthening, and the L ₂ *, a ₂ *, b ₂ * are L*a*b* values after strengthening.

Hereinafter, examples and comparative examples of the present invention will be described. The following examples are only examples of the present invention, and the present invention is not limited to the examples below.

(Example)

Example 1

<Before strengthening>

Using a magnetron sputtering evaporator, a low-emission coating having a multilayer structure coated on a transparent glass substrate was prepared as follows.

On the 5 mm thick transparent glass substrate, silicon nitride, a first dielectric layer, was deposited under an argon/nitrogen atmosphere, and then titanium oxide, a second dielectric layer, was formed under an argon/oxygen atmosphere. A third dielectric layer, silicon aluminum nitride, was formed under an argon/nitrogen atmosphere, and an aluminum zinc oxide layer and a nickel-chromium layer under 100% argon atmosphere were formed under an argon/oxygen atmosphere to form a first low-emission protective layer with a thickness of 0.5 nm. . In addition, a nickel-titanium niobium alloy layer was formed under 100% argon atmosphere to form an auxiliary low-emission protective layer (first auxiliary low-emission protective layer) to a thickness of 1 nm.

Next, a low-emission layer was formed by depositing a silver layer, and a nickel-titanium niobium alloy layer was formed on the upper surface of the low-emission layer under 100% argon atmosphere to form an auxiliary low-emission protective layer (second auxiliary low-emission protective layer) at 1 nm. Formed to a thickness.

Next, a nickel-chromium layer was formed under 100% argon atmosphere, and an aluminum zinc oxide layer was formed under argon/oxygen atmosphere to form a second low-emission protective layer with a thickness of 0.5 nm. Thereafter, a fourth dielectric layer, silicon aluminum nitride, was deposited under an argon/nitrogen atmosphere, and then a fifth dielectric layer, titanium oxide, was formed under an argon/oxygen atmosphere. Under the argon/nitrogen atmosphere, a sixth dielectric layer, silicon aluminum nitride, was formed.

<Strengthening treatment>

For the low-emission coating of the multi-layer structure coated on the transparent glass substrate prepared above, the Loida layer thin film was placed in the Box Furnace and subjected to heat treatment at 700° C. for about 5 minutes, followed by slow cooling to proceed with the strengthening process of the Roy glass.

Example 2

<Before strengthening>

Using a magnetron sputtering evaporator, a low-emission coating having a multilayer structure coated on a transparent glass substrate was prepared as follows.

On the 5 mm thick transparent glass substrate, a first dielectric layer, silicon aluminum aluminum, was deposited under an argon/nitrogen atmosphere, and then a second dielectric layer, titanium oxide, was formed under an argon/oxygen atmosphere. A third dielectric layer, silicon aluminum nitride, was formed under an argon/nitrogen atmosphere, and an aluminum zinc oxide layer and a nickel-chromium layer under 100% argon atmosphere were formed under an argon/oxygen atmosphere to form a first low-emission protective layer with a thickness of 0.5 nm. . In addition, a nickel-titanium-niobium alloy layer was formed under a 100% argon atmosphere to form an auxiliary low-emission protective layer to a thickness of 1 nm.

Next, a low emission layer was formed by depositing a silver layer, and a nickel chromium layer was formed on the upper surface of the low emission layer under 100% argon atmosphere, and a zinc oxide layer was formed under an argon/oxygen atmosphere to form a second low emission protection layer. Was formed to a thickness of 0.5 nm. Thereafter, a fourth dielectric layer, silicon aluminum nitride, was deposited under an argon/nitrogen atmosphere, and then a fifth dielectric layer, titanium oxide, was formed under an argon/oxygen atmosphere. Under the argon/nitrogen atmosphere, a sixth dielectric layer, silicon aluminum nitride, was formed.

<Strengthening treatment>

For the low-emission coating of the multi-layer structure coated on the transparent glass substrate prepared above, the Loida layer thin film was placed in the Box Furnace and subjected to heat treatment at 700° C. for about 5 minutes, followed by slow cooling to proceed with the strengthening process of the Roy glass.

Example 3

<Before strengthening>

Using a magnetron sputtering evaporator, a low-emission coating having a multilayer structure coated on a transparent glass substrate was prepared as follows.

On the 5 mm thick transparent glass substrate, a first dielectric layer, silicon aluminum aluminum, was deposited under an argon/nitrogen atmosphere, and then a second dielectric layer, titanium oxide, was formed under an argon/oxygen atmosphere. A third dielectric layer, silicon aluminum nitride, was formed under an argon/nitrogen atmosphere, and an aluminum zinc oxide layer and a nickel-chromium layer under 100% argon atmosphere were formed under an argon/oxygen atmosphere to form a first low-emission protective layer with a thickness of 0.5 nm. .

Next, a low-emission layer was formed by depositing a silver layer, and a nickel-titanium-niobium alloy layer was formed on the upper surface of the low-emission layer under an atmosphere of 100% argon to form an auxiliary low-emission protective layer with a thickness of 1 nm.

Next, a nickel chromium layer was formed under 100% argon atmosphere, and an aluminum zinc oxide layer was formed under argon/oxygen atmosphere to form a second low emission protective layer to a thickness of 0.5 nm. Thereafter, a fourth dielectric layer, silicon aluminum nitride, was deposited under an argon/nitrogen atmosphere, and then a fifth dielectric layer, titanium oxide, was formed under an argon/oxygen atmosphere. Under the argon/nitrogen atmosphere, a sixth dielectric layer, silicon aluminum nitride, was formed.

<Strengthening treatment>

For the low-emission coating of the multi-layer structure coated on the transparent glass substrate prepared above, the Loida layer thin film was placed in the Box Furnace and subjected to heat treatment at 700° C. for about 5 minutes, followed by slow cooling to proceed with the strengthening process of the Roy glass.

Comparative Example 1

Using a magnetron sputtering evaporator, a low-emission coating having a multilayer structure coated on a transparent glass substrate was prepared as follows.

A first dielectric layer, silicon aluminum aluminum, was deposited on a 5 mm thick transparent glass substrate under an argon/nitrogen atmosphere. Thereafter, an aluminum zinc oxide layer under an argon/oxygen atmosphere and a nickel-chromium layer under an argon 100% atmosphere were formed to form a first low-emission protective layer.

Next, a low-emission layer was formed by depositing a silver layer, and a nickel-chromium layer was formed on the upper surface of the low-emission layer under 100% argon atmosphere to form a second low-emission protective layer. Next, an aluminum oxide zinc layer was formed under an argon/oxygen atmosphere, and then a second dielectric layer, silicon aluminum aluminum, was formed under an argon/nitrogen atmosphere.

evaluation

Experimental Example 1

Performance analysis was performed for the functional building materials for windows and doors manufactured in Examples 1 to 3 and Comparative Example 1 by the following items.

<Refractive index measurement>

In Examples 1 to 3 and Comparative Example 1, the first dielectric layer, the third dielectric layer, the fourth dielectric layer, and the sixth dielectric layer were each formed by depositing using a sputtering equipment in a nitrogen atmosphere using a predetermined metal target, At this time, by properly adjusting the nitrogen content ratio, each layer was prepared to have a refractive index in a predetermined range. In addition, in Examples 1 to 3 and Comparative Example 1, the second dielectric layer and the fifth dielectric layer were formed by depositing by using sputtering equipment in an oxygen atmosphere using a predetermined metal target, respectively, at this time, an appropriate oxygen content ratio It was prepared so that each layer has a refractive index in a predetermined range.

Refractive index side for each layer prepared by measuring the optical spectrum with a width of 1nm section in the range of 250 to 2500nm using a UV-Vis-NIR spectrum measuring device (Shimadzu, Solidspec-3700), W. Theiss Hard-and Soft ware The refractive index was calculated through the Code (manufacturer: mthesis) program.

Refractive indices measured for Examples 1 to 3 and Comparative Example 1 are as follows.

division Example 1 Example 2 Example 3 Comparative Example 1 First dielectric layer 1.97 1.96 1.98 2.12 Second dielectric layer 2.38 2.37 2.35 - Third dielectric layer 2.05 2.03 2.08 2.15 4th dielectric layer 2.05 2.04 2.06 - 5th dielectric layer 2.36 2.38 2.37 - 6th dielectric layer 2.18 2.20 2.18 -

<Calculation of transmittance>

After measuring the optical spectrum using a UV-Vis-NIR spectrum measuring device (Shimadzu, Solidspec-3700) with a width of 1 nm in the range of 250 to 2500 nm, the resultant value was measured based on KS L 2514 standards, and the visible light transmittance was measured. Did.

<Emissivity>

FT-IR (Frontier, Perkin Elmer), a far-infrared spectral measurement device, was used to measure the far-infrared reflectance spectrum of one side coated with a low-emission coating of a functional building material for windows and doors. After calculating the average reflectance, the emissivity was evaluated by the formula of 100%-(far infrared average reflectance).

<Color Index>

L*, a*, and b* values based on CIE1931 were measured using a color difference meter (KONICA MINOLTA SENSING, InC., CM-700d). At this time, the light source was applied to D65 of KS standard.

The results evaluated as described above are as follows.

division Transmittance (%) Emissivity (%) Color index Transmission Coated surface reflection on the low-emission coating side Reflection of the substrate surface on the transparent substrate side a* b* a* b* a* b* Example 1 Before strengthening 74.6 6.0 -3.2 2.6 8.4 -16.5 0.4 -10.4 After strengthening 76.2 4.8 -3.8 1.5 10 -14 1.8 -8.9 Example 2 Before strengthening 75.3 5.8 -3.5 1.9 7.6 -15.6 0.2 -10.1 After strengthening 76.9 4.5 -3.7 1.7 9.5 -13.8 0.9 -8.8 Example 3 Before strengthening 75.1 5.8 -3.3 1.8 8.0 -15.7 -0.1 -9.9 After strengthening 76.8 4.6 -3.6 1.5 9.5 -13.9 0.7 -7.9 Comparative Example 1 Before strengthening 66.5 9.7 -2.4 -1.6 5.2 -9.4 -2.4 -8.3 After strengthening 75.0 8.5 -2.9 -1.1 3.4 -10.7 -1.2 -9..1

Example 1 improved the transmittance and emissivity according to before and after the strengthening treatment, and the change in optical performance is small compared to Comparative Example 1.

Experimental Example 2: Evaluation of wear resistance

For the functional building material for windows and doors manufactured according to Example 1 and Comparative Example 1, a wear resistance test was conducted using a washing machine (MANNA, MGR-460), and accordingly, scratches were applied to the surfaces of the low-emission coatings with the naked eye. The time of occurrence was measured.

Experimental Example 3: Evaluation of moisture resistance-50 ℃, 90% RH (humidity)

The functional building materials for windows and doors manufactured according to Example 1 and Comparative Example 1 were left under conditions of 50° C. and 90% RH (humidity) in a constant temperature and humidity chamber (LS Industrial Systems, EBS-35B), and the time point at which corrosion points occurred was evaluated. Did. It was confirmed whether a corrosion point occurred in the functional building material for windows and doors manufactured according to Example 1 and Comparative Example 1 using an optical microscope (X50).

Experimental Example 4: Evaluation of moisture resistance-85 ℃, 85% RH (humidity)

The functional building materials for windows and doors manufactured according to Example 1 and Comparative Example 1 were left under the conditions of -85°C and 85% RH (humidity) in a constant temperature and humidity chamber (LS Industrial Systems, EBS-35B), and the point at which corrosion points occurred. Was evaluated. It was confirmed whether a corrosion point occurred in the functional building material for windows and doors manufactured according to Example 1 and Comparative Example 1 using an optical microscope (X50).

The results of Experimental Example 2-3 are shown in Table 3 below.

division Abrasion resistance: Washer
(When scratch occurs) Storage performance: humidity chamber, 50℃, 90% RH (humidity)
(When the corrosion point occurred) Storage performance: humidity chamber, 85℃, 85% RH (humidity)
(When the corrosion point occurred) Example 1 10 minutes 10 days 10 days Example 2 10 minutes 10 days 10 days Example 3 10 minutes 10 days 10 days Comparative Example 1 10 minutes 10 days 10 days

From the results of Table 3, it can be seen that Examples 1 to 3 can implement a level of wear resistance and moisture resistance similar to those of Comparative Example 1.

Summarizing the results of Tables 2 and 3, it can be seen that Examples 1 to 3 can improve optical performance while not compromising wear resistance, and at the same time, can implement excellent optical performance and wear resistance and moisture resistance. There is.

As described above, the present invention has been described with reference to the exemplified drawings, but the present invention is not limited by the examples and drawings disclosed in the present specification, and can be varied by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, although the operation and effect according to the configuration of the present invention has not been explicitly described while explaining the embodiment of the present invention, it is natural that the effect predictable by the configuration should also be recognized.

10: transparent substrate
11: Low emission coating
12: low emission layer
13a, 13b: auxiliary low-emission protective layer
14a, 14b: low-emission protective layer
15a, 15b, 15c, 15d, 15e, 15f: dielectric layer
16: Top protective layer
17a, 17b: additional high refractive layer
18a, 18b: additional low refractive layer
100, 200, 300: functional building materials for windows and doors

Claims (10)

A transparent substrate and a low-emission coating formed on one surface of the transparent substrate,
The low-emission coating, sequentially stacked from the transparent substrate: a first dielectric layer, a second dielectric layer, a third dielectric layer, a first low-emission protective layer, a low-emission layer, a second low-emission protective layer, a fourth dielectric layer, a first A fifth dielectric layer and a sixth dielectric layer,
And an auxiliary low-emission protective layer between at least one of the first low-emission protective layer and the low-emission layer and between the low-emission layer and the second low-emission protective layer,
The auxiliary low-emission protective layer, the first low-emission protective layer and the second low-emission protective layer include a metal or alloy selected from the group consisting of Ni, Ti, Nb, Cr, Al, Zn, Mo, and combinations thereof,
The refractive index of the first dielectric layer and the refractive index of the third dielectric layer are respectively lower than the refractive index of the second dielectric layer,
The refractive index of the fourth dielectric layer and the refractive index of the sixth dielectric layer are respectively lower than the refractive index of the fifth dielectric layer.
Functional building materials for windows and doors. According to claim 1,
The first low-emission protective layer and the second low-emission protective layer each include a metal or alloy selected from the group consisting of Ni, Cr, an alloy of Ni and Cr, and combinations thereof, and the auxiliary low-emission protective layer Containing alloys of silver Ni, Ti and Nb
Functional building materials for windows and doors. According to claim 2,
The first low-emission protective layer and the second low-emission protective layer each include an alloy of 40 to 90 wt% Ni and 10 to 60 wt% Cr.
Functional building materials for windows and doors. According to claim 2,
The auxiliary low-emission protective layer comprises an alloy of 10 to 50 wt% Ni, 40 to 85 wt% Ti and 5 to 40 wt% Nb
Functional building materials for windows and doors. According to claim 2,
The thickness of the first low-emission protective layer and the second low-emission protective layer is 0.5 nm to 4 nm, respectively.
The thickness of the auxiliary low-emission protective layer is 0.5 nm to 4 nm
Functional building materials for windows and doors. According to claim 1,
Refractive indices of the first dielectric layer, the third dielectric layer, the fourth dielectric layer, and the sixth dielectric layer are 2.2 or less, respectively.
Refractive indices of the second dielectric layer and the fifth dielectric layer are 2.3 or more, respectively.
Functional building materials for windows and doors. According to claim 1,
Each of the first dielectric layer, the third dielectric layer, the fourth dielectric layer, and the sixth dielectric layer is a metal of Si, Al, Zn, or Sn, a composite metal including at least two kinds of the metal, an oxide of the metal, and a nitride of the metal, It includes one selected from the group consisting of the oxidizing nitride of the metal, the oxide of the composite metal, the nitride of the composite metal, the oxide of the composite metal, and combinations thereof
Functional building materials for windows and doors. According to claim 1,
The second dielectric layer and the fifth dielectric layer each include one oxide, oxynitride, or both selected from the group consisting of Ti, Zr, Nb, Ta, and combinations thereof.
Functional building materials for windows and doors. According to claim 1,
An additional high refractive layer and an additional low refractive layer are sequentially stacked on the third dielectric layer, the sixth dielectric layer, or both, to further include,
The additional low refractive layer has a refractive index of 2.2 or less
The additional high refractive layer has a refractive index of 2.3 or more
Functional building materials for windows and doors. The ΔE* _ab value by Equation 1 below before and after tempering by heat treatment is 3 or less.
Functional building materials for windows and doors.
[Equation 1]
ΔE* _ab = [(L ₁ *-L ₂ *) ² + (a ₁ *-a ₂ *) ² + (b ₁ *-b ₂ *) ² ] ^1/2
The L ₁ *, a ₁ *, and b ₁ * are L*a*b* values before strengthening, and the L ₂ *, a ₂ *, b ₂ * are L*a*b* values after strengthening.

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