JP2022513155A - Insulated glass unit with low CTE central plate glass - Google Patents

Abstract

The heat insulating glass unit includes a first flat glass, a second flat glass, a third flat glass between the first flat glass and the second flat glass, and the first flat glass and the third flat glass. It includes a first closed gap space between them and a second closed gap space between the second plate glass and the third plate glass. The third flat glass comprises a first glass sheet having a coefficient of thermal expansion (CTE) of less than about 70 × 10-7 / ° C over a temperature range of 0 to about 300 ° C.

Description

Cross-reference of related applications

This disclosure is based on US Provisional Patent Applications 62 / 773,287, 62 / 773, 378, and 62 / 773,382, all filed November 30, 2018, under Section 119 of the US Patent Act. The contents of each of the above provisional patent applications are incorporated by reference in their entirety.

The present disclosure generally relates to an insulating glass unit (IGU) composed of two or more glazings, wherein the two or more glazings have a low coefficient of thermal expansion (CTE), eg, less than about 70 × ^10-7 / ° C. , At least one flat glass, or at least one flat glass sheet component. The low CTE central plate glass can realize a relatively thin central plate glass having a thickness of less than 0.9 mm, for example. The present disclosure also relates generally to an insulating glass unit (IGU) comprising a laminated central glass sheet composed of two low CTE glass sheets. The present disclosure generally also relates to methods of making IGUs as described above, including those having one or more thin central glazings, wherein at least one central glazing has a low emissivity (on its surface). "Low-E") Includes coating.

Insulated glass units (IGUs) are useful as components in a wide range of applications, including building components, automotive components, display components, and consumer electronics components. The IGU can be used as a window made of a plurality of flat glass in a building or an automobile in order to provide a heat insulating property from an external environmental temperature. The IGU typically comprises two or more glass plates with peripheral edges sealed with a seal. The flat glass is separated, and the space between the flat glasses is filled with an inert gas such as argon or krypton or a mixture of inert gases after sealing. Thereby, the heat insulating performance or the thermal performance of the IGU can be improved. However, the maximum benefit of the sealed insulating gas layer is typically by applying one or more low emissivity (“Low-E”) coatings on one or more surfaces of the glazing. Achieved. The Low-E coating serves to reduce the transfer of thermal energy between the glass plates by radiating and absorbing the radiation.

In addition to thermal and thermal insulation performance, the IGU typically meets other design constraints, including, for example, weight, thickness, light transmission, mechanical strength, and / or manufacturing cost.

Triple glazing IGUs (eg, three glazings with two air cavities) exhibit improved thermal and thermal insulation performance compared to double glazing IGUs (eg, two glazings with one air cavity). This is indicated by an improvement in solar heat gain coefficient (SHGC) and / or adiabatic U value of approximately 20-30% or more. However, triple glazing IGUs can exhibit undesired weight, thickness, and / or manufacturing costs. In addition, additional weight, thickness, and / or manufacturing costs associated with the addition of flat glass can adversely affect the IGU, which prevents the IGU from meeting design requirements for a particular application.

Reduction of the thickness of the central plate glass has been proposed in the past. However, because the central plate glass is insulated on both sides, it can reach much higher temperatures and therefore higher stress levels than inward and outward plate glass, so the glass of the central plate glass has its mechanical strength. Needs to be thermally strengthened in order to be sufficiently improved to withstand the stress generated by the thermal gradient. In order to obtain sufficient fortification by thermal strengthening of soda lime glazing, a sheet thickness of at least 1.5-2 mm is generally required, the use of very thin (eg less than 1 mm) glass, and such very thin. The resulting benefits of glass are hampered.

As mentioned above, although thin central glazing is desirable for weight reduction, the thermal tempering process faces difficulties in providing the thin sheet with sufficient strength to withstand the thermal stresses generated in the IGU central glazing. do. In addition, the handling and operation required to cut very thin glass sheets and install them as IGU central plate glass or layers can be difficult to perform / achieve. One approach to overcoming these difficulties is to employ chemically fortified ultra-thin glass sheets. Chemical strengthening can facilitate handling requirements and also allow the sheet manufactured as a central plate glass to withstand thermal stresses. However, in window designs where the central plate glass needs to have a Low-E coating on one or both sides, manufacturability becomes a potential issue when using such chemically strengthened thin sheet glass. For example, Low-E coating is most efficiently applied to large sheets, while Low-E coated sheets cannot be chemically strengthened. In addition, when chemical fortification is used on large sheets that are later cut to the size for windows, the sheet can be cut, but it is often a somewhat delicate and difficult process, resulting in loss due to breakage. there is a possibility. Such results are useless for large-scale manufacturing. Moreover, the chemically enhanced strength of the edges of the sheet can be lost almost or completely by the cutting process. Therefore, the handling benefits obtained by strengthening cannot be realized, and as a result, the economic efficiency of manufacturing may not be particularly beneficial. Alternatively, cutting to a certain size first and then strengthening and coating is not economically attractive as a manufacturing process because it requires coating and strengthening for individual pieces. Further, reducing the thickness of the central plate glass tends to reduce the acoustic performance (noise attenuation) of the IGU. Thus, if the handling and operation required to cut an extremely thin glass sheet and install it as a central plate glass or layer of IGE with the required design and performance features is difficult to carry out and achieve. There is.

The present disclosure discloses a first flat glass, a second flat glass, a third flat glass between the first flat glass and the second flat glass, and between the first flat glass and the third flat glass. The present invention relates to a heat insulating glass unit having a first closed gap space and a second closed gap space between the second flat glass and the third flat glass. The third plate glass includes a first glass sheet having a coefficient of thermal expansion (CTE) of less than about 70 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C. The third plate glass can include a first glass sheet and a second glass sheet integrally laminated by a polymer intermediate layer, and 0 to 0 of the first glass sheet and the second glass sheet. The coefficient of thermal expansion (CTE) over a temperature range of about 300 ° C. is less than about 70 × ^10-7 / ° C.

According to another embodiment of the present disclosure, a heat insulating glass unit (“IGU”) is described, which includes a first flat glass, a second flat glass, a third flat glass, and the first flat glass and the second flat glass. A heat insulating glass unit (1101) is provided, further comprising a fourth flat glass between the flat glass and the flat glass. A first sealed gap space is defined between the first plate glass and the third plate glass. A second closed gap space is defined between the third plate glass and the fourth plate glass, and a third sealed gap space is formed between the second plate glass and the fourth plate glass. Is defined between. The third plate glass includes a first glass sheet having a coefficient of thermal expansion (CTE) of less than about 70 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C. The third plate glass can include a first glass sheet and a second glass sheet integrally laminated by a polymer intermediate layer, and 0 to 0 of the first glass sheet and the second glass sheet. The coefficient of thermal expansion (CTE) over a temperature range of about 300 ° C. is less than about 70 × ^10-7 / ° C. Similarly, the fourth plate glass can include a first glass sheet and a second glass sheet integrally laminated by a polymer intermediate layer, and the first glass sheet and the second glass sheet of the first glass sheet and the second glass sheet can be included. The coefficient of thermal expansion (CTE) over the temperature range of 0 to about 300 ° C. is less than about 70 × ^10-7 / ° C.

According to still another embodiment of the present disclosure, a method of making a heat insulating glass unit is a step of cutting a third plate glass of a selected size from a large glass sheet, from 0 to about 0 of the large glass sheet. The thermal expansion coefficient (CTE) over the temperature range of 300 ° C. is less than about 70 × ^10-7 / ° C., step; subsequently the third flat glass, the first flat glass and the second flat glass, or the first. Assembled with the plate glass, the second plate glass, the third plate glass, and the fourth plate glass, the third plate glass is positioned between the first plate glass and the second plate glass, and is first sealed. The gap space is defined on one side of the third plate glass, and the second sealed gap space is defined on the other side of the third plate glass, including a step of forming a heat insulating glass unit. ..

Further features and advantages of the present disclosure are described in the "forms for carrying out the invention" below, some of which will be readily apparent to those of skill in the art from the description, or the following "implementation of the invention". By practicing the methods described herein, including "forms for", claims and accompanying drawings.

Both the above "Summary of the Invention" and the following "Forms for Carrying Out the Invention" present various embodiments of the present disclosure, which are an overview and an overview for understanding the nature and characteristics of the claims. Please understand that it is intended to provide a framework. The accompanying drawings are included to provide a further understanding of the present disclosure, which are incorporated herein and form part of this specification. These drawings exemplify various embodiments of the present disclosure and serve to illustrate the principles and operations of the present disclosure as well as the present description.

The following "form for carrying out the invention" can be further understood by reading it together with the following drawings.

Sectional drawing of an IGU composed of three flat glass sheets according to the embodiment of the present disclosure. Sectional drawing of an IGU composed of three flat glass sheets according to the embodiment of the present disclosure. Sectional drawing of an IGU composed of four flat glass sheets according to an embodiment of the present disclosure. The figure of the manufacturing method of IGU by embodiment of this disclosure. Maximum principal stress on the central layer of EAGLE XG® glass in a 3-layer IGU at + 60 ° C. Distortion of the central layer of EAGLE XG glass in a three-layer IGU at -40 ° C Graph of leading edge distortion (sag) of glass sheet as a function of thickness when the glass sheet is machined on a roller bed conveyor with typical roller spacing Graph of strain and stress as a function of sheet thickness under temperature gradient in the transverse direction with respect to the thickness of the glass sheet constrained at the edges

Hereinafter, various embodiments of the present disclosure will be described with reference to FIGS. 1-8 illustrating exemplary embodiments of the IGU and its components, features, or characteristics. The following overview is intended to provide an overview of the device in question, and throughout this disclosure, the various embodiments are relatively specific with reference to the non-limiting embodiments illustrated. explain. These embodiments are generally interchangeable within the context of the present disclosure.

Disclosed herein is an insulating glass unit (IGU) comprising a first glazing, a second glazing, and a third glazing disposed between the first glazing and the second glazing. Is. An embodiment of the IGU1000 is shown in the cross-sectional view of FIG. Other embodiments are shown in the cross-sectional views of FIGS. 2 and 3. In some embodiments, the third plate glass is composed of a glass laminate containing two glass sheets with an intermediate polymer film. The coefficient of thermal expansion (CTE) of one or more glass sheets constituting the central plate glass over a temperature range of 0 to about 300 ° C. is less than about 70 × ^10-7 / ° C.

An embodiment of the IGU 1000 is shown in FIG. 1, which comprises three flat glass pieces 110, 120, and 130. The first (outer) plate glass 110 can be positioned so that its outer surface 112 faces the surrounding external environment. The second (inner) flat glass 120 can be positioned such that its outer surface 122 faces the inside, eg, the inside of a building, automobile, or home appliance. The third (center) plate glass 130 can be arranged between the first plate glass 110 and the second plate glass 120, and can be separated from them. The third plate glass 130 can be positioned substantially parallel to the first plate glass 110 and the second plate glass 120. The flat glass 110, 120, 130 can all be optically transparent, or one or more of these layers, or one or more portions or parts thereof, can be translucent, opaque, or translucent. be able to. The third plate glass 130 has a CTE of less than about 70 × ^10-7 / ° C, or less than about 50 × ^10-7 / ° C, or less than about 35 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C. Includes at least one glass sheet. In some embodiments, the third plate glass 130 comprises a first glass sheet 131 and a second glass sheet 132 with an intermediate polymer film or intermediate layer 133, for example as shown in FIG. 2 as IGU1100. Including, including a glass laminate.

According to various embodiments, the first plate glass 110 and the second plate glass 120 may be thicker than the third plate glass 130. In some embodiments, the first plate glass 110 may be thicker than the third plate glass 130. In the embodiment, the second plate glass 120 may be thicker than the third plate glass 130. In some embodiments, the plate glass 110, 120 has a thickness of about 2 mm to about 16 mm, or about 2 mm to about 10 mm, such as about 3 mm to about 8 mm, or about 4 mm to about 7 mm, or about 5 mm to about 6 mm ( Including all ranges and subranges between them). In certain non-limiting embodiments, the first flat glass 110 and the second flat glass 120 can include soda lime glass, but other glass types such as aluminosilicate and alkaline aluminosilicate glass, or other similar. Unlimited use of glass. The coefficient of thermal expansion (CTE) of the first flat glass 110 and / or the second flat glass 120 is, in various embodiments, greater than about 70 × ^10-7 / ° C, eg, greater than about 75 × ^10-7 / ° C, or Approximately 80 x ^10-7 / ° C or higher, or approximately 85 x ^10-7 / ° C or higher, or approximately 90 x ^10-7 / ° C or higher, approximately 95 x ^10-7 / ° C or higher, or approximately 10 x ^10-6 /. It can be above ° C (including all and subranges between them), for example from about 70 × ^10-7 / ° C to about 15 × ^10-6 / ° C.

According to various embodiments, of these layers, one or both of the first glazing 110 and the second glazing 120 are toughened by thermal tempering, chemical strengthening, or other similar processes. The mechanical strength of one or both can be improved. The first plate glass 110 and the second plate glass 120 can be manufactured by a float or fusion draw manufacturing process in some embodiments.

In certain embodiments of the present disclosure, a portion or all of the inner surface 114 of the first glass plate 110 may be covered with at least one first coating 117 (as shown in FIG. 1), eg, an improvement in thermal performance. Can be coated with a low emissivity coating for. Low emissivity coatings are known in the art and include, but are not limited to, spatter containing one or more metals and / or metal oxides such as, for example, silver, titanium, and fluorine-doped tin oxide. Coat-pyrolytic coating can be included. Alternatively, or further, the large surface 134 of the third plate glass 130 (e.g. corresponding to the surface facing the first sheet 131, i.e. the gap 125 in the laminated version), and (eg, the second in the laminated version). At least one portion or all of the large surface 137 (corresponding to the surface of the sheet 132, i.e. facing the gap 115) can be coated with at least one coating, such as low emissivity coating 136. Alternatively, or further, a portion or all of the inner surface 124 of the second glass plate 120 can be coated with at least one coating, such as the low emissivity coating 116, as shown in FIG. These coatings may be the same or different, depending on the desired properties and / or end application of the IGU. Combinations of multiple coatings can also be used. In various embodiments, one or more of the coatings can be optically transparent.

In a non-limiting embodiment, the third plate glass 130 can be made thinner than the first plate glass 110 and the second plate glass 120. In some embodiments, the total thickness of the third plate glass 130 is less than about 2 mm, such as about 0.8 mm to less than about 2 mm, or about 0.9 mm to less than about 1.8 mm, or about 1 mm to about 1. Less than 0.7 mm, or about 1.1 mm to less than about 1.6 mm, or less than about 1.6 mm, or about 1.5, about 1.4, about 1.2, or less than about 0.9 mm (between these) All ranges and partial ranges are included). According to a further aspect, the thickness of the third flat glass 130 is more than about 0.4 mm, or more than about 0.5 mm.

In certain non-limiting embodiments, the third flat glass 130 can include borosilicate glass. In another non-limiting embodiment, the third plate glass 130 may include boroaluminosilicate glass, such as alkaline earth boroaluminosilicate glass, or alkali-free boroaluminosilicate glass, or other similar glass types. can. Exemplary commercial glassware include, but are not limited to, Corning EAGLE XG and Rotus® glass. In some embodiments, the third plate glass 130 can be manufactured by a float or fusion draw manufacturing process.

According to various embodiments, the CTE of the third plate glass 130 can be lower than the CTE of the first plate glass 110 and / or the second plate glass 120. As used herein, CTE is the coefficient of thermal expansion measured over a temperature range of 0 to about 300 ° C. for the specified glass composition, or a glass sheet or plate glass composed of the glass composition. Point to. In certain embodiments, the CTE (CTE ₃ ) of the third plate is less than about 70 × ^10-7 / ° C, eg, less than about 60 × ^10-7 / ° C, or less than about 50 × ^10-7 / ° C. Or less than about 45 x ^10-7 / ° C, or less than about 40 x ^10-7 / ° C, or less than about 35 x ^10-7 / ° C, or less than about 30 x ^10-7 / ° C ^, or about 25 x 10- It can be less than ⁷ / ° C. (including all and partial ranges between them), for example from about 10 × ^10-7 / ° C to about 70 × ^10-7 / ° C. In a further embodiment, the CTE (CTE ₁ ) of the first plate glass and / or the CTE (CTE ₂ ) of the second plate glass is made higher than the CTE (CTE ₃ ) of the third plate glass, for example, CTE ₁ >. CTE ₃ and / or CTE ₂ > CTE ₃ or CTE ₁ ≧ 2 * CTE ₃ and / or CTE ₂ ≧ 2 * CTE ₃ or CTE ₁ ≧ 2.5 * CTE ₃ and / or CTE ₂ ≧ 2.5 * CTE ₃ or CTE ₁ ≧ 3 * CTE ₃ and / or CTE ₂ ≧ 3 * CTE ₃ can be set.

As mentioned above, one or all of one or both of the large surfaces of the third glass plate 130 can be coated with at least one coating, such as the low emissivity coating described above for coatings 116, 117 and 136. Alternatively, or further, an ink and / or surface feature portion, such as a decorative ink, a light-scattering ink, and / or a light-scattering surface feature portion, on a portion or all of one or both of the large surfaces of the third plate glass 130. The pattern can be formed with. For example, by forming a laser pattern, a bulk scattering feature portion located in the lower glass matrix of the surface can be provided in the third plate glass 130. Surface scatter feature portions can also be formed by laser pattern formation. If the coatings and / or patterns are applied to both large surfaces of the third glass plate 130, these coatings and / or patterns may be the same or different, depending on the desired properties and / or end application of the IGU. You may. Combinations of multiple coatings and combinations of multiple surface patterns can also be used. In a further embodiment, the third glass plate 130 can comprise at least one coating and at least one of an ink, a surface feature portion, and a bulk feature portion. As a matter of course, the first plate glass 110 and the second plate glass 120 can be similarly provided with such a coating, a pattern, and / or a feature portion.

Referring to FIG. 1 again, the third plate glass 130 and the outer plate glass 110 can be separated from each other, the first gap space 115 can be defined between them, and the third plate glass 130 and the second plate glass 120 can be defined. And can be separated from each other, and a second gap space 125 can be defined between them. The gap spaces 115 and 125 can both be hermetically sealed by the sealant assemblies 118 and 128, and the sealant assemblies 118 and 128 may be a single component or two components, and if they are composed of two components, they are the same. Parts may be used or different parts may be used. An exemplary sealant assembly can be formed from a polymeric seal or other encapsulant material, such as silicone rubber. The gap spaces 115 and 125 can be filled with an inert gas. Suitable inert gases include, but are not limited to, argon, krypton, xenon, and combinations thereof. A mixture of a plurality of inert gases or a mixture of one or more inert gases and air can also be used. Exemplary and non-limiting inert gas mixtures include argon / air with a ratio of 90/10 or 95/5, krypton / air with 95/5, or 22/66/12 argon / krypton / air mixture. Will be. Other ratios of the inert gas, or of the inert gas to air, can also be used depending on the desired thermal performance and / or end application of the IGU. According to various embodiments, the gases used to fill the interstitial spaces 115, 125 may be the same or different.

The gas pressures in the first gap space 115 and the second gap space 125 may be the same or different. The difference in gas pressure may be due, for example, to the difference in average gas temperature in these two spaces, for example, depending on the relative ambient and internal temperatures, the gas in the first gap space 115 may be the first. It may be hotter than the gas in the gap space 125 of 2 or vice versa. The differential pressure between these two gap spaces 115, 125 may be sufficient to bend or bend the third plate glass 130 depending on the thickness of this layer. In some embodiments, the third plate glass 130 may be provided with at least one channel or opening to prevent deflection, thereby bringing the gas in the gap space 115 into contact with the gas in the gap space 125. be able to. The opening can be provided, for example, by drilling one or more orifices or holes in the third plate glass 130, or by providing a pressure relaxation path or channel through the sealant assemblies 118, 128.

Here, with reference to FIG. 3, another IGU 1101 with four flat glass 110, 120, 130, 140 is shown. The illustrated embodiment is similar to that of FIGS. 1 and 2 except that the IGU 1101 comprises an additional fourth (center) plate glass 140. The central plate glasses 130 and 140 are arranged between the first plate glass 110 and the second plate glass 120.

In a non-limiting embodiment, the fourth plate glass 140 can be made thinner than the first plate glass 110 and the second plate glass 120. In some embodiments, the fourth plate glass 140 can be made thinner than the first plate glass 110 and the second plate glass 120. In some embodiments, the total thickness of the fourth plate glass 140 is less than about 2 mm, such as about 0.8 mm to less than about 2 mm, or about 0.9 mm to less than about 1.8 mm, or about 1 mm to about 1. Less than 0.7 mm, or about 1.1 mm to less than about 1.6 mm, or less than about 1.6 mm, or about 1.5, about 1.4, about 1.2, or less than about 0.9 mm (between these) All ranges and partial ranges are included). According to a further aspect, the thickness of the fourth flat glass 140 is more than about 0.4 mm, or more than about 0.5 mm. In some embodiments, the fourth flat glass 140 can be a glass laminate comprising a first glass sheet 141 and a second glass sheet 142 with an intermediate polymer film or intermediate layer 143. The thickness of the fourth flat glass 140 may be the same as or different from the thickness of the third flat glass 130.

In certain non-limiting embodiments, the fourth plate glass 140 can include boroaluminosilicate glass, such as alkaline earth boroaluminosilicate glass, or alkali-free boroaluminosilicate glass, or other similar glass types. .. Exemplary commercially available glassware include, but are not limited to, Corning EAGLE XG and Lotus glass. According to various embodiments, the mechanical strength of this layer can be improved by fortifying the fourth flat glass 140, for example by thermal tempering, chemical strengthening, or other similar processes. In some embodiments, the fourth flat glass 140 can be manufactured by a float or fusion draw manufacturing process. The composition of the fourth plate glass 140 may be the same as or different from the composition of the third plate glass 130. Similarly, the mechanical properties of the fourth flat glass 140, for example, the degree of strengthening, may be the same as or different from the mechanical properties of the third flat glass 130.

According to various embodiments, the CTE of the fourth plate glass 140 can be lower than the CTE of the first plate glass 110 and / or the second plate glass 120. In certain embodiments, the CTE (CTE ₄ ) of the fourth plate is less than about 70 × ^10-7 / ° C, eg, less than about 60 × ^10-7 / ° C, or less than about 50 × ^10-7 / ° C. Or less than about 45 x ^10-7 / ° C, or less than about 40 x ^10-7 / ° C, or less than about 35 x ^10-7 / ° C, or less than about 30 x ^10-7 / ° C ^, or about 25 x 10- It can be less than ⁷ / ° C. (including all and partial ranges between them), for example from about 10 × ^10-7 / ° C to about 70 × ^10-7 / ° C. In a further embodiment, the CTE (CTE ₁ ) of the first plate glass and / or the CTE (CTE ₂ ) of the second plate glass is made higher than the CTE (CTE ₄ ) of the fourth plate glass, for example, CTE ₁ >. CTE ₄ and / or CTE ₂ > CTE ₄ , or CTE ₁ ≧ 2 * CTE ₄ and / or CTE ₂ ≧ 2 * CTE ₄ , or CTE ₁ ≧ 2.5 * CTE ₄ and / or CTE ₂ ≧ 2.5 * CTE ₄ or CTE ₁ ≧ 3 * CTE ₄ and / or CTE ₂ ≧ 3 * CTE ₄ can be set. CTE ₃ and CTE ₄ may be the same or different. According to a non-limiting embodiment, CTE ₃ is substantially equal to CTE ₄ .

Although not shown in FIG. 3, one or both of the large surfaces 134 and 137 of the third plate glass 130 and / or one or both of the large surfaces 144 and 147 of the fourth plate glass 140. Part or all may be coated with at least one coating, such as coating 146, which may be the low emissivity coating shown on the large surface 144 of the fourth glass plate 140. Alternatively, or further, ink and / or surface feature portions, such as decorative inks, light-scattering inks, and / or surface feature portions, on one or all of the large surfaces of one or both of the third plate glass 130 and / or the fourth plate glass 140, and / or / Or a pattern can be formed at the light-scattering surface feature portion. For example, by laser pattern formation, a bulk scatter feature portion located in the lower glass matrix of the surface can be provided in the third plate glass 130 and / or in the fourth plate glass 140. Surface scatter feature moieties can also be formed using laser pattern formation. The coating and / or surface pattern on one or both faces of the third glazing 130 and / or the fourth glazing 140 may be the same or different depending on the desired properties and / or end application of the IGU. May be. In a further embodiment, the third plate glass 130 and / or the fourth plate glass 140 can comprise at least one coating and at least one of an ink, a surface feature portion, and a bulk feature portion.

The third plate glass 130 and the first plate glass 110 (for example, the outer plate glass) can be separated from each other, the first gap space 115 can be defined between them, and the third plate glass 130 and the fourth plate glass 140 can be separated from each other. And can be separated from each other, a second gap space 125 can be defined between them, and a fourth plate glass 140 and a second plate glass 120 (for example, an inner plate glass) can be separated from each other. A third gap space 135 can be defined. The gap spaces 115, 125, 135 can be hermetically sealed by sealant assemblies 118, 128, 138, which may be of a single structure or of multiple parts, each identical or at least one other. Has a different shape from. An exemplary sealant assembly is disclosed above, and an exemplary inert gas and inert gas mixture for filling the interstitial space is disclosed above with reference to FIG. According to various embodiments, the gases used to fill the interstitial spaces 115, 125, 135 may be the same or different.

Referring to FIGS. 1-3, the thicknesses of the gap spaces 115, 125, 135 may vary depending on the configuration of the IGU, eg, about 6 mm to about 18 mm, such as about 7 mm to about 16 mm, or about 8 mm to about. It can be 14 mm, or about 10 mm to about 12 mm (including all and partial ranges between them). The thicknesses of the gap spaces 115, 125 (FIG. 2) or the gap spaces 115, 125, 135 (FIG. 3) may be the same or different. The total thickness of the IGU 1000 or 1100 is about 40 mm or less, for example about 36 mm or less, or about 32 mm or less, or about 30 mm or less, or about 28 mm or less, or about 26 mm or less (including all and partial ranges between them). ). In some embodiments, the low U value, which is an indicator of improved thermal insulation properties, is that the thickness of the interstitial space is from about 14 mm to about 16 mm and the total thickness of the IGU 1000 or 1100 is from about 36 mm to about 40 mm. Can be obtained in case. The total thickness of the IGU1101 is about 60 mm or less, for example about 56 mm or less, or about 54 mm or less, or about 50 mm or less, or about 40 mm or less, or about 30 mm or less, or about 26 mm or less (all ranges and portions between them). Includes range). In some embodiments, a low U value, which is an indicator of improved thermal insulation properties, is when the thickness of the interstitial space is from about 16 mm to about 18 mm and the total thickness of the IGU1101 is from about 54 mm to about 60 mm. Obtainable.

The first flat glass 110 and the second flat glass 120 in FIGS. 1 and 2 are shown as a single glass sheet, but the flat glass is a glass laminate as shown in the flat glass 110 and 120 in FIG. The scope of the claims attached to this specification is not limited in this way because the structure can be provided. Suitable glass-polymer laminated structures include a single glass sheet laminated on a polymer film, two glass sheets with an intermediate polymer film as shown, and the like. In some embodiments, the laminate can include two or more flat glass, eg, three or more flat glass, wherein the flat glass is an alkaline earth boroaluminosilicate glass, an alkali-free boroaluminosilicate glass, and Soda lime glass can be mentioned.

According to a further aspect of the present disclosure, the first plate glass 110 includes a first polymer intermediate layer between the first glass sheet and the second glass sheet, and the first polymer intermediate layer is the above-mentioned first. It is adhered to the glass sheet 1 and the second glass sheet. In some embodiments, the first polymer intermediate layer comprises a first polymer having a first elastic modulus and a second polymer having a second elastic modulus, wherein the first elastic modulus is It exceeds at least about 20 times the above-mentioned second elastic modulus. Similarly, and according to a further aspect, the second plate glass 120 is a third glass sheet and a fourth glass sheet, and a second glass sheet between the third glass sheet and the fourth glass sheet. A polymer intermediate layer is included, and the second polymer intermediate layer is adhered to the third glass sheet and the fourth glass sheet. In some embodiments, the second polymer intermediate layer comprises the first polymer and the second polymer. This is also the same, and according to a further aspect, the third plate glass 130 further includes a fifth glass sheet 131 and a sixth glass sheet 132, and a fifth glass sheet 131 and a sixth glass sheet 132. The third polymer intermediate layer 133 is included, and the third polymer intermediate layer 133 is adhered to the fifth glass sheet 131 and the sixth glass sheet 132. In some embodiments, the third polymer intermediate layer 133 comprises the first polymer and the second polymer. The polymer intermediate layer containing the first polymer and the second polymer assists in reducing acoustic transmission.

The IGUs disclosed herein can be used in a variety of applications, typically as products including non-limiting examples such as windows, doors, and skylights in buildings, as well as other architectural applications; It can be configured as an automotive window and other automotive applications; as a window or display panel for home appliances; and as a display panel for electronic devices. According to various embodiments, one or more LEDs can be optically coupled to at least one edge of the IGU to provide illumination over one or more areas of the IGU. Edge lighting can provide, for example, lighting that mimics sunlight, which can be useful in architectural and automotive applications such as skylights and sunroofs. As mentioned above, one or more flat glass of the IGU can be provided with bulk or surface light scattering feature portions, which can promote the uniformity of the light transmitted by the IGU. In some embodiments, the low CTE glass is more likely to form such light scattering features than the high CTE glass, which often cracks or causes other defects during laser pattern formation. Laser processing can be easily performed.

In various non-limiting embodiments, some of the conventional IGUs are surpassed by using a thin low CTE laminated glass for one or more central glazings, eg, a third glazing and / or a fourth glazing. Can provide benefits. For example, a low CTE central plate glass can have improved resistance to thermal stresses and / or fractures caused by temperature gradients across the IGU without the need for chemical or thermal fortification. Therefore, manufacturing costs can be reduced by eliminating the thermal tempering or chemical strengthening steps used to strengthen central plate glass, including conventional glass with a relatively high CTE.

Further, by using the laminated central plate glass as a central plate glass as opposed to a single glass sheet, the physical handling requirements of the thin central plate glass and the handling requirements at the time of manufacture can be relaxed. Thus, in some embodiments of the present disclosure, the central plate glass may be composed of a plurality of sheets as thin as about 0.4 to about 0.7 mm, whereby the laminated plate glass as a whole is the most conventional. Much thinner than thin central glass. By using a laminated central plate glass with a polymer interlayer, especially any acoustic PVB polymer layer, the acoustic attenuation is improved, which can help offset the reduction in acoustic attenuation produced by the reduction in the mass of the central plate glass. ..

The use of low CTE glass also makes it possible to economically provide Low-E coatings on one or both surfaces of relatively thin flat glass. When low CTE glass is not used, it needs to be strengthened so that it will not be damaged at the position of the central plate glass, and heat strengthening at <0.9 mm or less is difficult or impossible with conventional techniques. In addition, chemical fortification is economically impractical as it is incompatible with large pre-Low-E coated sheets that are later cut to the appropriate size. Therefore, using low CTE glass, a thin Low-E coated sheet and a plate glass containing the same can be realized by the techniques described and claimed herein.

Referring to FIG. 4, in some embodiments of the present disclosure, the method illustrated as method 1102 in FIG. 4 is provided for making IGU1000, 1100, 1101. Method 1102 comprises cutting a glass sheet 130 of a size selected from the large glass sheet 150, for example as shown by a dashed line. The large glass sheet 150 has a low emissivity coating 156 on its first large surface 154 and optionally on its second large surface 158. The CTE of the large glass sheet 150 over a temperature range of 0 to about 300 ° C. can be about 70 × ^10-7 / ° C. The thickness of this large glass sheet can be less than about 2 mm, less than about 1.5 mm, less than about 1.4 mm, less than about 1.2 mm, or less than about 0.9 mm. According to a further aspect, the thickness of the third flat glass 130 is more than about 0.4 mm, or more than about 0.5 mm. The method further comprises a glass sheet 130 as a third plate glass 130 or as a component of the third plate glass 130 with a first plate glass 110 and a second plate glass 120 (as in the IGU 1000 or 1100), or (as in the IGU 1000 or 1100). It comprises the step of assembling integrally with the first plate glass 110, the second plate glass 120, and the fourth plate glass 140 (as in IGU 1101). The third plate glass 130 is assembled so as to be positioned between the first plate glass 110 and the second plate glass 120, where the first sealed gap space 115 is one of the third plate glass 130. The second closed gap space 125 is positioned on the other side of the third plate glass 130. The large glass sheet 150 preferably has a lower coefficient of thermal expansion (CTE) over the temperature range of 0 to about 300 ° C., which is less than about 50 × ^10-7 / ° C. or about 35 × ^10-7 / ° C. can. Further, the thickness of the large glass sheet 150 can be less than about 0.8 mm or about 0.6 mm. In a further aspect, the thickness of the large glass sheet 150 can preferably be greater than about 0.4 mm, or greater than about 0.5 mm.

According to another embodiment, FIG. 4 shows a method of manufacturing an IGU having a thin laminated central plate glass. The illustrated IGU (insulated glass unit) manufacturing method 1102 comprises cutting a third plate glass 130 of a size selected from the laminated sheet 150, as shown by the dashed line in the drawing. The laminated sheet 150 includes a first glass sheet 131 and a second glass sheet 132 integrally laminated with the polymer intermediate layer 133, and has a temperature range of 0 to about 300 ° C. of the first and second glass sheets. The CTE spanning is less than about 70 × ^10-7 / ° C and the thickness is less than about 0.9 mm. In the above method, the third plate glass 130 is further assembled with the first plate glass 110 and the second plate glass 120, or the first plate glass 110, the second plate glass 120, and the fourth plate glass 140, and the first plate glass 130 is assembled. Including a step of forming a heat insulating glass unit 1100, 1101 having a third glazing positioned between the glazing and the second glazing, where the first sealed gap space 115 is the third glazing. Positioned on one side and the second sealed gap space 125 is positioned on the other side of the third plate glass. The overall thickness of the laminated sheets can be greater than about 0.8 mm, whereby the individual sheets 131, 132 have a thickness of about 0.4 mm or greater for ease of handling during lamination. be able to. The laminated sheet 150 can have length and width dimensions of at least about 1.3 x about 1.3 m and preferably more than about 2 x about 2 m. In another optional modification embodiment, at least one of the large surfaces 154 and 158 of the laminated sheet can be coated with at least one coating 156, such as a low emissivity coating.

Since the thermal tempering of the central plate glass can be avoided, the optical performance of the IGU can be improved, for example, by the absence of warpage or birefringence caused by such processing steps. The absence of a thermal tempering step also allows for thinner central plate glass, which results in a reduction in overall IGU thickness and / or weight. The weight reduction of the IGU can result in cost savings during manufacturing, transportation, installation, maintenance and / or operation. Reducing the thickness of the IGU can extend the range of applications for the IGU, which can be limited by constraints in conventional designs.

The thinner the low CTE central layer, the wider the enclosed gap space between the plate glasses. The larger the volume of the insulating gas in the enclosed gap space, the more the energy efficiency of the IGU can be improved. An IGU with a narrow enclosed gap space may have an increased risk of bending due to the shrinkage of the gas in the gap space, which may lead to contact between the outer glass and one or more central glass. Such contacts are aesthetically unpleasant and allow direct heat transfer between the glass plates, which may be unacceptable from an energetic point of view. The use of thinner low CTE central plate glass can provide a wider gap and thus reduce the potential risk of deflection and / or contact between plate glass.

Thermal stresses leading to glass breakage in the IGU can be caused, for example, by abrupt temperature changes in one region of the IGU with respect to another region of the IGU. For example, a sharp rise in external (ambient) temperature relative to internal temperature, or vice versa, can generate thermal stresses in one or more regions of the IGU. For example, on a cold morning, sunlight incident on the window can cause the temperature of the area of the IGU exposed to this sunlight to rise sharply, but the perimeter of the IGU placed under the frame of the window, for example, remains cold. .. Finite element analysis (FEA) modeling has shown that the thermal stress obtained in the central plate glass can reach about 0.62 MPa per 1 ° C. temperature difference for conventional soda lime glass. Alternatively, under summer conditions (eg, ~ 28 ° C.), the central plate glass can reach temperatures as high as about 60 ° C, which results in a temperature difference of about 40 ° C. between the central plate glass and the outer plate glass. Therefore, the thermal stress obtained in the central layer containing soda lime glass can be about 25 MPa or more.

The CTE of soda lime glass is approximately 90 × ^10-7 / ° C. By comparison, the CTE of Corning® EAGLE XG glass is 31.7 × ^10-7 / ° C, i.e. about 1/3 of the CTE of soda lime glass. Under the same thermal gradient of 40 ° C. as described above, the thermal stress applied to the central layer containing EAGLE XG glass is 8.7 MPa, which risks fracture without the use of thermal tempering or chemical strengthening. descend.

Modeling was performed to evaluate the use of low CTE glass as the central plate glass between the two high CTE plates in the IGU. This model has an outer plate glass containing soda lime glass (thickness = 4 mm), an inner plate glass containing soda lime glass (thickness = 6 mm), and a central plate glass containing EAGLE XG glass (thickness = 0.7 mm). A three-layer IGU (length = 1265 mm, width = 989 mm) was assumed. The gap between the central plate glass and the inner plate glass and the outer plate glass had a width of 12 mm, was filled with argon gas, and was sealed by a silicone rubber peripheral edge seal.

Referring to FIG. 5, a scenario in which the tensile stress on a third plate glass made of low CTE glass (using Corning EAGLE XG as the low CTE glass) is modeled at + 60 ° C. and the soda lime plate glass expands with temperature rise. I simulated it. FIG. 6 is a model of the compressive stress on the EAGLE XG central plate glass at −40 ° C. for simulating a scenario in which the soda lime plate glass shrinks due to a decrease in temperature. FIG. 5 shows that the maximum principal stress on the EAGLE XG central plate glass at + 60 ° C. is less than 1 MPa, FIG. 6 shows that the strain of the EAGLE XG central plate glass is less than 1 mm, which are modeled. It is shown that the IGU (consisting of three sheets of glass) can well withstand fracture, warpage, and / or breakage due to thermal stresses induced by both hot and cold temperature gradients.

FIG. 7 is a function of thickness when a glass sheet is machined on a roller bed conveyor with typical roller spacing, such as that used to transport glass during Low-E coating as an example of the process. It is a graph of the calculated strain (sag) of the leading edge of the glass sheet as. As can be seen in the drawing, there is a dramatic difference in the start of sag between about 0.5 mm and about 0.4 mm or less. Therefore, the thickness of the large sheet 150 and the sheet 130 obtained by cutting from the large sheet 150 is preferably at least about 0.4 mm or more, or about 0.5 mm or more.

FIG. 8 shows the thickness of a glass sheet constrained at the edges under a temperature gradient in the transverse direction with respect to the thickness (such as those that may be present in the window under certain weather conditions). It is a graph of the calculated strain and stress as a function. Similar to the strain shown in FIG. 7, there is a dramatic difference in heat-induced strain between 0.5 mm and about 0.4 mm or less. Again, for this reason, the thickness of the large sheet 150 and the sheet 130 obtained by cutting from it is preferably at least about 0.4 mm or more, or about 0.5 mm or more.

It will be appreciated that the various embodiments of the present disclosure may be associated with the particular features, elements or steps described in connection with such particular embodiment. Also, certain features, elements or steps may be interchangeable or combined with alternative embodiments in combinations or sequences not exemplified, even though they are described in connection with a particular embodiment. Will be understood.

Also, as used herein, the terms "the" and "a or an" mean "at least one" and are not explicitly stated otherwise. It should also be understood that, as long as it is, it should not be limited to "only one". Thus, for example, a reference to "a component" has one such "component" or two or more such "components" unless the context explicitly states otherwise. Includes an example. Similarly, "plurality" or "array" is intended to refer to more than one, and thus "array of components" or "multiple components". "Plurality of components") refers to two or more such components.

As used herein, the range may be expressed as "about" from one particular value and / or "about" another particular value. When such a range is represented, examples include from one particular value above and / or to another particular value above. Similarly, by using the antecedent "about", it will be understood that the particular value forms another aspect when the value is expressed as an approximation. Furthermore, it will be understood that the endpoints of each range are important, both in relation to the other endpoint and independent of the other endpoint.

All numbers expressed herein are to be construed as including "about", whether or not so stated, unless explicitly stated otherwise. However, it is further understood that each of the numbers listed is considered accurate, regardless of what is expressed as "about" that value. Therefore, both "dimension less than 100 nm" and "dimension less than 100 nm" are "dimensions less than about 100 nm" and "dimensions less than 100 nm". Includes embodiments of.

Unless stated otherwise, none of the methods described herein is intended to be construed as requiring the steps to be performed in a particular order. Therefore, it is specifically stated in the claims or description that a method claim does not actually enumerate the order in which the steps should follow, or that the steps should be limited to a particular order. If not, it is not intended at all to estimate any particular order.

Various features, elements or steps of a particular embodiment may be disclosed using the transitional phrase "... including / composing", but the transitional phrase "consisting of" or "consisting of". It should be understood that alternative embodiments are also implied, including those that can be described using "consentially of". Thus, for example, alternative embodiments implied for devices comprising A + B + C include embodiments in which the device comprises A + B + C and embodiments in which the device essentially comprises A + B + C.

It will be appreciated by those skilled in the art that various modifications and variations can be made to this disclosure without departing from the spirit and scope of this disclosure. As modifications, combinations, partial combinations and variations of embodiments of the present disclosure incorporating the spirit and content of the present disclosure may be recalled to those of skill in the art, the present disclosure is the scope of the appended claims and their equivalents. It shall be interpreted as including everything within the scope of.

Hereinafter, preferred embodiments of the present invention will be described in terms of terms.

Embodiment 1
First flat glass (110);
Second flat glass (120);
A third plate glass (130) arranged between the first plate glass and the second plate glass;
A first enclosed gap space (125) defined between the first plate glass and the third plate glass; and a second defined between the second plate glass and the third plate glass. 2 sealed gap space (115)
Equipped with
The third flat glass is a heat insulating glass unit (1100) including a first glass sheet (131) having a coefficient of thermal expansion (CTE) of less than about 70 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C. ).

Embodiment 2
The third plate glass further includes a second glass sheet (132) laminated on the first glass sheet (131) by the polymer intermediate layer (133), and is 0 to about 300 of the second glass sheet. The insulated glass unit according to embodiment 1, wherein the coefficient of thermal expansion (CTE) over a temperature range of ° C. is less than about 70 × ^10-7 / ° C.

Embodiment 3
The coefficient of thermal expansion (CTE) of one or both of the first glass sheet and the second glass sheet over a temperature range of 0 to about 300 ° C. is less than about 50 × ^10-7 / ° C. The insulated glass unit according to the first or second embodiment.

Embodiment 4
The coefficient of thermal expansion (CTE) of one or both of the first glass sheet and the second glass sheet over a temperature range of 0 to about 300 ° C. is less than about 35 × ^10-7 / ° C. The insulated glass unit according to the first or second embodiment.

Embodiment 5
The heat insulating glass unit according to any one of embodiments 1 to 4, wherein the third flat glass includes boroaluminosilicate glass.

Embodiment 6
The heat insulating glass unit according to the fifth embodiment, wherein the third plate glass contains an alkaline earth boroaluminosilicate glass or an alkali-free boroaluminosilicate glass.

Embodiment 7
The heat insulating glass unit according to any one of embodiments 1 to 6, wherein the third plate glass includes float-formed glass.

8th embodiment
The heat insulating glass unit according to any one of the first to seventh embodiments, wherein the thickness of the third flat glass is less than about 1.6 mm.

Embodiment 9
The heat insulating glass unit according to any one of the first to eighth embodiments, wherein the thickness of the third flat glass is less than about 0.9 mm.

Embodiment 10
At least one of at least one of the inner surface (114) of the first plate glass, the inner surface (124) of the second plate glass, and the large surface (134, 137) of the third plate glass is The insulating glass unit according to any one of embodiments 1 to 9, which is coated with at least one low emissivity coating (116, 117, 136).

Embodiment 11
The insulating glass unit according to the tenth embodiment, wherein at least one large surface of the third flat glass is coated with the at least one low emissivity coating (136).

Embodiment 12
First flat glass (110);
Second flat glass (120);
Third flat glass (130);
A fourth plate glass (140) arranged between the first plate glass and the second plate glass;
A first enclosed gap space (115) defined between the first plate glass and the third plate glass;
A second enclosed gap space (125) defined between the third plate glass and the fourth plate glass; and defined between the second plate glass and the fourth plate glass. , Third closed gap space (135)
Equipped with
The third flat glass is a heat insulating glass unit (1101) including a first glass sheet (131) having a coefficient of thermal expansion (CTE) of less than about 70 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C. ).

13th embodiment
The third plate glass further includes a second glass sheet (132) laminated on the first glass sheet (131) by the polymer intermediate layer (133), and is 0 to about 300 of the second glass sheet. 12. The insulated glass unit according to embodiment 12, which has a coefficient of thermal expansion (CTE) of less than about 70 × ^10-7 / ° C over a temperature range of ° C.

Embodiment 14
The fourth plate glass includes a first glass sheet (141) and a second glass sheet (142) integrally laminated by a polymer intermediate layer (143), and the first glass sheet and the second glass sheet. The insulated glass unit (1200) according to embodiment 13, wherein the glass sheet has a coefficient of thermal expansion (CTE) of less than about 70 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C.

Embodiment 15
The temperature of each of the first glass sheet and the second glass sheet of the third plate glass, and the first glass sheet and the second glass sheet of the fourth plate glass is 0 to about 300 ° C. The insulated glass unit according to embodiment 14, wherein the coefficient of thermal expansion (CTE) over a range is less than about 35 × ^10-7 / ° C.

Embodiment 16
The heat insulating glass unit according to the fifteenth embodiment, wherein the thickness of each of the third plate glass and the fourth plate glass is less than about 1.6 mm.

Embodiment 17
A method for manufacturing a heat insulating glass unit (1102).
The above method is:
A step of cutting a glass sheet (130) of a selected size from a large glass sheet (150) having a first large surface (154) and a second large surface (158), which is the step of cutting the large glass sheet (130). The coefficient of thermal expansion (CTE) of 150) over a temperature range of 0 to about 300 ° C. is less than about 70 × ^10-7 / ° C. and the thickness is less than about 0.9 mm, step;
The glass sheet is used as a third flat glass (130) or as a component of the third flat glass (130), integrally with the first flat glass (110) and the second flat glass (120), or as a first. Between the first plate glass (110) and the second plate glass (120) by being integrally assembled with the plate glass (110), the second plate glass (120), and the fourth plate glass (140). In the step of forming the heat insulating glass unit (1000, 1100, 1101) having the positioned third plate glass (130), the first sealed gap space (115) is the third plate glass (130). ) Is positioned on one side and the second sealed gap space (125) is positioned on the other side of the third plate glass (130), comprising a step.

Embodiment 18
The method according to embodiment 17, wherein the large glass sheet (150) has a coefficient of thermal expansion (CTE) of less than about 50 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C.

Embodiment 19
The method according to embodiment 17, wherein the large glass sheet (150) has a coefficient of thermal expansion (CTE) of less than about 35 × ^10-7 / ° C over a temperature range of 0 to about 300 ° C.

20th embodiment
The method according to any one of embodiments 17 to 19, wherein the large glass sheet (150) has a thickness of less than about 0.8 mm.

21st embodiment
The method according to any one of embodiments 17 to 19, wherein the large glass sheet (150) has a thickness of less than about 0.4 mm.

Embodiment 22
The method according to embodiment 17, wherein the large glass sheet is a laminated sheet including a first glass sheet (131) and a second glass sheet (132) integrally laminated by a polymer intermediate layer (133).

23rd Embodiment
The method according to any one of embodiments 17 to 22, wherein the thickness of the third flat glass is more than about 0.8 mm.

Embodiment 24
The method according to embodiment 23, wherein the length and width of the laminated sheet are larger than about 1.3 × about 1.3 m.

25th embodiment
The method according to any one of embodiments 17-24, wherein at least one of the large surfaces of the large sheet is coated with at least one low emissivity coating (156).

Embodiment 26
17. The method of embodiment 17, wherein the assembling step further comprises a step of providing a building product.

110 First plate glass, outer plate glass 112 Outer surface of first plate glass 110 114 Inner surface of first plate glass 110 115 Gap, first gap space 116, 136, 156 Low radiation coating 117 First coating 118, 128, 138 Sealant Assembly 120 Second Plate Glass, Inner Plate Glass 122 Outer Surface of Second Plate Glass 120 124 Inner Surface of Second Plate Glass 120 125 Gap, Second Gap Space 130 Third Plate Glass, Central Plate Glass, Glass Sheet 131, 141 First 1 glass sheet 132, 142 second glass sheet 133, 143 intermediate polymer film, intermediate layer 134, 137, 144, 147 large surface 135 third gap space 140 fourth plate glass, central plate glass 146 coating 150 large sheet 151 1st large surface 152 2nd large surface 154 1st large surface 158 2nd large surface 1000, 1100, 1101 IGU

Claims (10)

First flat glass (110);
Second flat glass (120);
A third plate glass (130) arranged between the first plate glass and the second plate glass;
A first enclosed gap space (125) defined between the first plate glass and the third plate glass; and a second defined between the second plate glass and the third plate glass. 2 sealed gap space (115)
Equipped with
The third glass plate is a heat insulating glass unit (1100) including a first glass sheet (131) having a coefficient of thermal expansion (CTE) of less than 70 × 10 ^-7 / ° C over a temperature range of 0 to 300 ° C. The third plate glass further includes a second glass sheet (132) laminated on the first glass sheet (131) by a polymer intermediate layer (133), and has a temperature of 0 to 300 ° C. of the second glass sheet. The insulated glass unit according to claim 1, wherein the coefficient of thermal expansion (CTE) over the temperature range of is less than 70 × 10 ^-7 / ° C. Claim that the coefficient of thermal expansion (CTE) of one or both of the first glass sheet and the second glass sheet over a temperature range of 0 to 300 ° C. is less than 50 × ^10-7 / ° C. The heat insulating glass unit according to 1 or 2. Claimed that the coefficient of thermal expansion (CTE) of one or both of the first glass sheet and the second glass sheet over a temperature range of 0 to 300 ° C. is less than 35 × ^10-7 / ° C. The heat insulating glass unit according to 1 or 2. The heat insulating glass unit according to any one of claims 1 to 4, wherein the third flat glass includes boroaluminosilicate glass. The heat insulating glass unit according to claim 5, wherein the third plate glass contains an alkaline earth boroaluminosilicate glass or an alkali-free boroaluminosilicate glass. The heat insulating glass unit according to any one of claims 1 to 6, wherein the third plate glass includes float-formed glass. The heat insulating glass unit according to any one of claims 1 to 7, wherein the thickness of the third flat glass is less than 1.6 mm. The heat insulating glass unit according to any one of claims 1 to 8, wherein the thickness of the third flat glass is less than 0.9 mm. At least one of at least one of the inner surface (114) of the first plate glass, the inner surface (124) of the second plate glass, and the large surface (134, 137) of the third plate glass is. The insulating glass unit according to any one of claims 1 to 9, which is coated with at least one low emissivity coating (116, 117, 136).

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