JP2024508657A - Multi-pane insulating glass unit with a relaxed film forming the third pane and method of making the same - Google Patents

Abstract

An insulating glass unit and method for forming the same provides a unitary sealed unit having a pair of glass panes in parallel, spaced relationship and defining a space between the pair of glass panes. at least one edge spacer and at least a primary sealant located between adjacent edges of the pair of panes; and at least one transparent film located within the space between the pair of glass panes. , at least one transparent film is firmly secured to one of the support structure and the at least one edge spacer, the film being disposed in spaced parallel relationship between the pair of glass panes. at least one transparent film, the film being annealed to a relaxed state prior to placing the film between the pair of glass panes.

Description

This application claims priority to and claims priority to U.S. Provisional Application No. 63/150,222, filed February 17, 2021, and U.S. Patent Application No. 17/670,859, filed February 14, 2022. The disclosure is incorporated by reference in its entirety.

The present invention relates to a multi-pane insulating glass unit having a third pane formed from a relaxed film supported by either a flexible frame or edge spacers and a method for its fabrication.

Insulating glass units having a third pane, or even more panes, in the form of a plastic sheet or multilayer film supported between a pair of glass panes are known. The glass panes are connected to each other via at least one circumferential spacer, at least a primary seal, and a secondary seal provided along an edge of the glass pane. The third pane creates a space between each of the glass panes, and the space may be filled with air or gas to reduce thermal conductance across the window structure. Any inert, low heat transfer gas may be used, including krypton, argon, sulfur hexafluoride, carbon dioxide, etc. This fill gas may contain some appreciable amount of oxygen to prevent or minimize yellowing of the interior surface of the plastic third pane. One example of an insulating glass unit is illustrated in FIG. In this design, the third pane includes low-e coated PET film, which is a high cost component. The third pane is securely secured to the circumferential spacer, the primary seal, and the secondary seal. This process requires at least a secondary sealant to be fully heat cured first to support the film during the heated wrinkle removal step. A fully assembled unit results in very inefficient heat transfer to the film, which requires 2-4 hours, typically closer to 4 hours, to assemble. One of the main drawbacks of this design, in addition to the long assembly time, is that the film often wrinkles, which means that since the film is fully integrated into the system, the entire unit This means that it must be destroyed. Even when the film is attached to the spacer, any distortion of the unit during shipping or operation will cause the film to wrinkle, even if no leakage occurs. Designs that include multiple intermediate panes necessarily have additional interfaces between the intermediate panes and the primary and secondary seals, which increases the risk of air intrusion.

Many prior art insulating glass units with two panels cannot achieve better than R5 thermal performance.

There is a need in the art for an insulating glass unit that is quick and easy to assemble, where the occurrence of third pane wrinkles is minimized. There is also a need in the art for an insulating glass unit that allows for the presence of additional intermediate panes without creating additional interfaces.

According to one aspect, the present disclosure provides a pair of glass panes in parallel, spaced-apart relationship and a unitary sealed unit defining a space between the pair of glass panes. at least one edge spacer and at least a main sealant located between adjacent edges of the pair of panes; and at least one transparent film located within the space between the pair of glass panes. and an insulating glass unit. The at least one transparent film is securely secured to one of the support structure and the at least one edge spacer such that the film provides a spacing between the pair of glass panes. Installed in spaced parallel relationship. The film is annealed by applying heat to the film for a predetermined period of time to a relaxed state prior to placing the film between the pair of glass panes.

The at least one transparent film is supported by the support structure or edge spacer. According to one embodiment, the film may be fixed directly to the edge spacer. According to another embodiment, the film may be rigidly fixed to the support structure, the support structure comprising at least one frame member located adjacent to an edge of the film. The at least one frame member may be flexible and may have a sufficient thickness so that the frame member does not lose its shape under its weight. According to one embodiment, a 1/16" thick aluminum frame may be used. According to another embodiment, the support structure extends along the edges of the film. A pair of sandwiched frame members can be provided.

The film may be annealed prior to or after securing the film to the support structure. The film is annealed to a relaxed state, and the relaxed state of the film has a tension of no more than 0.1 lb per linear inch.

Depending on the type of film used, the film is heated to a certain annealing temperature to cause stress-induced crystallization of the film. According to one embodiment, the film may be heated to an annealing temperature of at least 70° C. for approximately 10 minutes.

The film can include at least one of a polymeric sheet, a thin glass sheet, and/or any other transparent sheet. According to one embodiment, the film may be a polymeric sheet comprising polyethylene terephthalate (PET). The film can also include a number of materials embedded in the film or coated on one or both sides to control the transmission and/or reflection spectra. At least one surface of the film can include a low-e coating. The film may also be configured to act as a sounding membrane.

The film may be secured to the support structure or the at least one edge spacer by at least one of a mechanical member, an adhesive, and a thermoplastic welding process. The support structure may be rigidly secured to the edge spacer.

According to one embodiment, the pair of glass panes can include a first glass pane and a second glass pane, and the support structure includes a first chamber and a second glass pane. a first chamber located between said first glass pane and a first side of said film to ensure pressure equalization between said second glass pane and said chamber; The film may be configured to allow gas to move between the second side of the film and a second chamber located between the film and the second side of the film.

According to another aspect, the present disclosure is directed to a method for forming an insulating glass unit, comprising the steps of providing a pair of glass panes in parallel, spaced-apart relationship; Stretching the film to remove wrinkles; securing the film to one of a support structure and at least one edge spacer; and bringing the film to a relaxed state. applying heat to the film to anneal the film, the step of annealing the film securing the film to one of the support structure and the at least one edge spacer; applying heat to the film before or after the fixing step, and the film and support structure are placed in spaced parallel relationship between the pair of glass panes. installing the film securely secured to the support structure between the pair of glass panes so as to provide an integrally sealed unit defining a space between the pair of panes; and providing the at least one edge spacer and primary sealant between adjacent edges of the pair of panes.

According to one embodiment, the film may be fixed directly to the at least one edge spacer. Alternatively, the film may be securely secured to the support structure, and the film and support structure may be attached to the pair of glass panes at a location remote from the at least one edge spacer. installed between.

The support structure may include at least one flexible frame member located adjacent an edge of the film or a pair of flexible frame members sandwiching the edges of the film. According to one embodiment, the support structure can include at least one frame member located adjacent an edge of the film, the at least one frame member being flexible, and the support structure comprising: has a sufficiently thick thickness so that it should not lose its shape under its weight. According to one embodiment, an approximately 1/16" thick aluminum frame may be used.

The film is heated to a temperature and for a period of time sufficient to cause stress-induced crystallization such that the relaxed state of the film has a tension of 0.1 lb per linear inch or less. Sometimes.

The method includes the step of trimming the film after the film is annealed to the relaxed state and securely secured to one of the support structure and the at least one edge spacer. Including further. The film may be securely secured to one of the support structure and the at least one edge spacer by at least one of a mechanical member, an adhesive, and/or a thermoplastic welding process. be.

The use of the divider polymer film of the present invention having a low thermal mass reduces the wrinkle removal temperature in less than 1 hour or even less than 1 second, compared to the total prior art wrinkle removal time of 2 to 4 hours. may reach. The invention also allows for interchangeability with respect to various combinations of glass thickness, low-e coatings and location of these coatings within the unit. This allows the manufacturer to adapt the design to provide the desired cost/performance trade-off for a given building, geographic area, or code requirements. Supporting the center divider or third pane on a separate structure allows offset of the divider from the centerline of the unit more easily than in the prior art. This allows easier muntin placement/addition while still improving thermal performance. Also, unlike the prior art where intermediate panes are integrated into a unit, the system of the present invention may be separated into subcomponents for assembly. This allows for improved yield of the final system by allowing scrapping of off-spec parts early in the process. It is also much easier to include multiple intermediate panels or panes within a unit.

The invention is illustrated in the accompanying drawn figures, in which like reference characters identify like parts throughout. Unless indicated to the contrary, figures drawn are not to scale.

1 is a cross-sectional side view of a multi-pane insulating glass unit according to the prior art; FIG. 1 is a cross-sectional side view of a multi-pane insulating glass unit according to an embodiment of the invention; FIG. 3 is an exploded side perspective view of a portion of the multi-pane insulating glass unit of FIG. 2 in accordance with an embodiment of the invention; FIG. FIG. 3 is a cross-sectional side view of a multi-pane insulating glass unit showing various arrangements for securing a third pane within the glass unit according to embodiments of the invention. FIG. 3 is a cross-sectional side view of a multi-pane insulating glass unit showing various arrangements for securing a third pane within the glass unit according to embodiments of the invention. FIG. 3 is a cross-sectional side view of a multi-pane insulating glass unit showing various arrangements for securing a third pane within the glass unit according to embodiments of the invention. FIG. 3 is a cross-sectional side view of a multi-pane insulating glass unit showing various arrangements for securing a third pane within the glass unit according to embodiments of the invention. Figures 1A and 1B are partial cross-sectional views showing various arrangements for mounting support structures within a multi-pane insulating glass unit. Figures 1A and 1B are partial cross-sectional views showing various arrangements for mounting support structures within a multi-pane insulating glass unit. Figures 1A and 1B are partial cross-sectional views showing various arrangements for mounting support structures within a multi-pane insulating glass unit. FIG. 3 is a cross-sectional partial side view of a frame/third pane according to an embodiment of the invention; 6B is a perspective view of the frame of FIG. 6A according to an embodiment of the invention. FIG. FIG. 3 is a cross-sectional partial side view of a frame/third pane according to an embodiment of the invention; 6B is a perspective view of the frame of FIG. 6A according to an embodiment of the invention. FIG. FIG. 3 is a cross-sectional partial side view of a frame/third pane according to an embodiment of the invention; 6B is a perspective view of the frame of FIG. 6A according to an embodiment of the invention. FIG. FIG. 7 illustrates the steps of securing a third pane to a support structure according to an embodiment of the invention. FIG. 7 illustrates the steps of securing a third pane to a support structure according to an embodiment of the invention. FIG. 7 illustrates the steps of securing a third pane to a support structure according to an embodiment of the invention. FIG. 7 illustrates the steps of securing a third pane to a support structure according to an embodiment of the invention. 2 is a graph illustrating optimal temperature determination for pre-install heating with film shrinkage vs. use of pre-shrink or low shrink films according to embodiments of the invention. 2 is a graph illustrating optimal temperature determination for pre-install heating with film shrinkage vs. use of pre-shrink or low shrink films according to embodiments of the invention. 2 is a graph illustrating optical position with respect to the center panel for best thermal performance in accordance with features of the invention; FIG. 1 is a cross-sectional partial view showing various arrangements for pressure equalization between panels of a multi-pane insulating glass unit according to the invention; FIG. 1 is a cross-sectional partial view showing various arrangements for pressure equalization between panels of a multi-pane insulating glass unit according to the invention; FIG. 1 is a cross-sectional partial view showing various arrangements for pressure equalization between panels of a multi-pane insulating glass unit according to the invention; FIG. 1 is a cross-sectional partial view showing various arrangements for pressure equalization between panels of a multi-pane insulating glass unit according to the invention; FIG. 1 is a perspective view of a multi-pane insulating glass unit including muntins in accordance with an embodiment of the invention; FIG. 13A is a cross-sectional partial view of the multi-pane insulating glass unit of FIG. 13A according to an embodiment of the invention; FIG.

Spatial or directional terms used herein, such as "left", "right", "top", "bottom", etc., relate to the invention as shown in the depicted figures. It is to be understood that the invention may assume various alternative orientations and therefore such terminology should not be considered limiting.

As used herein, spatial or directional terms such as "left", "right", "inside", "outside", "above", "below", etc. refer to the figures depicted. Relating to the invention as indicated. However, it is to be understood that the invention is capable of assuming various alternative orientations and therefore such terminology should not be considered limiting. Additionally, as used herein, all numbers expressing dimensions, physical properties, processing parameters, amounts of ingredients, reaction conditions, etc. used in the specification and claims refer to "about" It is to be understood that the terminology is modified in all instances. Accordingly, unless indicated to the contrary, the numerical values set forth in the following specification and claims may vary depending on the desired properties sought to be obtained by the present invention. At a minimum, and not as an attempt to limit the scope of the claims and the application of equivalent theory, each numerical value shall be interpreted with the stated number of significant digits taken into account and by the application of ordinary rounding techniques. should at least be interpreted as such. Moreover, all ranges disclosed herein are to be understood to include the starting and ending values of the range and any and all subranges subsumed therein. For example, a stated range of "1 to 10" includes any and all subranges between (and inclusive) a minimum value of 1 and a maximum value of 10, i.e., starting with a minimum value of 1 or more. And all subranges ending with a maximum value of 10 or less should be considered to include, for example 1 to 3.3, 4.7 to 7.5, 5.5 to 10, etc. Additionally, all documents, including without limitation issued patents and patent applications, referred to herein are to be considered "incorporated by reference" in their entirety.

All numbers used in the specification and claims are to be understood as modified in all instances by the term "about." All ranges disclosed herein are to be understood to include the starting and ending values of the range and any and all subranges subsumed therein. Ranges stated herein represent average values over the stated range.

All documents referred to herein are to be considered "incorporated by reference" in their entirety.

Any reference to quantity is "by weight percent" unless expressly stated otherwise.

Discussion of the invention herein refers to "particularly" or "preferably" within certain limits (e.g., "preferably", "more preferably", or "even more preferably" within certain limits). ) may describe certain characteristics. It is to be understood that the invention is not limited to these specific or preferred limitations, but rather encompasses the entire scope of the disclosure.

As used herein, the transitional term "comprising" (and other equivalent terms, e.g., "containing" and "comprising") means "limiting It is "open-ended" and is open to the inclusion of matters not explicitly stated. Although described with the term "comprising," the terms "consisting essentially of" and "consisting of" are also within the scope of this disclosure.

The invention comprises, consists of, or consists essentially of the following aspects of the invention in any combination. Various aspects of the invention are illustrated in the separately drawn figures. However, it should be understood that this is simplified for ease of illustration and discussion. In practicing the invention, one or more aspects of the invention illustrated in one depicted figure may be one or more aspects of the invention illustrated in one or more of the other depicted figures. May be combined with

Reference is now made to FIG. 1, which shows a cross-sectional side view of a multi-pane insulating glass unit, designated generally as 1, according to the prior art. Unit 1 includes a pair of glass panes 2a, 2b in parallel and spaced relationship. A third pane in the form of a coated film 4 is placed between the panes 2a, 2b, creating an empty space or chamber 5a, 5b between the panes 2a, 2b and the film 4. The film 4 is firmly fixed to the edge spacers 8a, 8b using the main sealant 6. Edge spacers 8a, 8b generally extend around the periphery of their respective panes 2a, 2b. The edge spacers 8a, 8b are of the same size in cross section so that the film 4 is placed halfway between the opposing panes 2a, 2b. The edge spacers 8a, 8b may be shaped such that the panes 2a, 2b are parallel to each other and to the film 4 when the panes 2a, 2b are attached to the edge spacers 8a, 8b. A secondary seal 7 is provided to further secure the film 4 and within the unit 1. The process for making the prior art glass unit 1 comprises the steps of assembling the entire unit including panes 2a, 2b, film 4, edge spacers 8a, 8b, primary sealant 6, secondary sealant 7; curing the sealant, which may take up to an hour, and shrinking the film 4 in an oven, which may take an additional 2 hours or more, and then manually sealing the spaces 5a, 5b with an inert gas such as argon. and steps to complete the work.

In prior art designs, the use of edge spacers 8a, 8b sandwiching the central film 4 forms two interfaces with the main sealant material 6, with the central film 4 forming a mechanical support. It further extends outward so as to be firmly gripped by the sub-sealing material 7. This can result in the application of shear stress on the seal, which can increase the likelihood of seal failure. These two additional interfaces also result in additional failure points for air ingress, which can degrade the thermal performance of the unit 1. Additionally, the time to build Unit 1 can be several hours, anywhere from 3 to 5 hours or more.

Reference is now made to FIGS. 2-3, which illustrate a multi-pane insulating glass unit, designated generally as 10, according to embodiments of the invention. Unit 10 includes a pair of glass panes 12a, 12b in parallel and spaced relationship. At least one edge spacer 18 is provided between the glass panes 12a, 12b. A first or primary sealing material 16 seals the adjacent edges of the pair of glass panes 12a, 12b to provide an integrally sealed unit defining a space 15 between the pair of glass panes 12a, 12b. placed between them. At least one transparent film 14 is placed inside the space 15 between the pair of glass panes 12a, 12b. At least one transparent film 14 is attached to a support structure 20 as shown in FIGS. 2, 3, and 4A-4C, or to at least one edge spacer 18 as shown in FIG. 4D. The glass panes 12a, 12b are firmly fixed together so that the film is installed in spaced parallel relationship between a pair of glass panes 12a, 12b so as to create a pair of spaces 15a, 15b. The support structure 20 may be a single frame or a pair of frames 20a, 20b. Spaces 15a, 15b may be filled with air or gas to reduce thermal conductance across the window structure. Any inert, low heat transfer gas may be used, including krypton, argon, sulfur hexafluoride, carbon dioxide, etc. Combinations of gases and/or different gases may be used within spaces 15a, 15b to obtain the desired reduction in thermal conductance. This fill gas may contain some appreciable amount of oxygen to prevent or minimize yellowing of the inner film 14.

Film 14 is annealed prior to installing film 14 between a pair of glass panes 12a, 12b. Annealing the film reduces the internal stresses within the film that are often introduced during manufacturing, allows the film to become more malleable during the forming process or during any further processing, and especially Reduces the possibility of cracking when exposed to temperature fluctuations.

This annealing step releases tension within film 14 through stress-induced crystallization. This step typically takes several minutes, depending on the material used for film 14 and the temperature at which the film is heated to anneal film 14.

Depending on the type of film 14 used, the film 14 is heated to a certain annealing temperature to cause stress-induced crystallization of the film 14. When the film is a plastic material, the process of annealing involves heating the film to half the film's melting temperature for a short period of time, then cooling the film back to allow it to stress relax. can include. If the film is a metallic material, the film is typically prepared by heating the metal above the recrystallization temperature of the metal, maintaining a suitable temperature for a suitable length of time, and cooling. is annealed. Films formed from glass undergo a controlled cooling process to prevent cracking or destruction of the film. According to one embodiment, the film may be heated to an annealing temperature of at least 70° C. for approximately 10 minutes. According to other examples, the film may be heated to above 110°C, 90°C, or 85°C.

According to the embodiments shown in FIGS. 2, 3, and 4A-4C, at least one transparent film 14 is supported by a support structure or frame 20. In the embodiment shown in FIGS. The film 14 may be rigidly secured to a support structure or frame, where a frame 20 is located adjacent the edge and extends around the periphery of the film 14. This at least one frame 20 may be flexible and may have a sufficient thickness that the frame should not lose its shape under its weight, but rather should maintain its shape. According to one embodiment, an aluminum frame approximately 1/16" thick may be used. Depending on the material used for the frame, the frame may be approximately 1/16" thick. ”) may have a thickness that is less than or greater than ”). According to another embodiment, the support structure can include a pair of frames 20a, 20b sandwiching the edges of the film 14 and extending around the periphery of the film 14.

In the FIG. 4A arrangement, a single edge spacer 18 is located between panes 12a and 12b and a single frame 20 is provided to support film 14. Edge spacer 18 may be a C-shaped member having vertical lateral portions 28 and horizontal top and bottom portions 29 . Edge spacer 18 extends generally around the periphery of panes 12a, 12b. Frame 20 may be secured to edge spacer 18 mechanically or adhesively, or by any other well-known technique. The frame 20 and film 14 may be equally spaced between the panes 12a, 12b to create equal spaces 15a, 15b between the film 14 and the panes 12a, 12b. Alternatively, frame 20 and film 14 may be placed between panes 12a, 12b such that one of spaces 15a or 15b is larger than the other of spaces 15a, 15b. A primary seal 16 may be used to securely secure the edge frame 18 to the panes 12a, 12b and may extend along the vertical lateral portions 28 of the edge spacer 18.

The FIG. 4B arrangement shows a pair of edge spacers 18a, 18b for supporting frame 20. In this arrangement, film 14 is securely secured to a single frame 20, which is mounted between edge spacers 18a, 18b and securely secured thereto with adhesive 22. Edge spacers 18a, 18b generally extend around the periphery of their respective panes 12a, 12b. The edge spacers 18a, 18b may have the same dimensions in cross-section, however, because the frame 20 is inserted between the spacers 18a, 18b, the film 14 has the same dimensions as the opposing panes 12a, 12b. They are not installed in the middle between them, and one of the spaces 15a, 15b is larger than the other space 15a, 15b. The edge spacers 18a, 18b may be shaped such that the panes 12a, 12b are parallel to each other and to the film 14 when the panes 12a, 12b are attached to the edge spacers 18a, 18b. A primary sealant 16 may be provided between the edge member 18 and the pane 12, and a secondary sealant 17 may be provided along the vertical lateral portions of the spacers 18a, 18b to seal the unit 10. There is.

The FIG. 4C arrangement shows a pair of edge spacers 18a, 18b for supporting frame 20. This arrangement is achieved by securing the film 14 to a single frame 20, which is mounted between the edge spacers 18a, 18b and secured thereto using adhesive 22. Similar to the 4B configuration. In this arrangement, the frame 20 is thin and has vertically extending legs 24 located adjacent the vertical lateral portions 28 of the edge spacer 18 and horizontal upper portions 29 of the edge spacer 18. It may be shaped like an L-shape with horizontally extending legs 26. Edge spacers 18a, 18b generally extend around the periphery of their respective panes 12a, 12b. The edge spacers 18a, 18b can have the same dimensions in cross-section, however, because the horizontal legs 26 of the frame 20 are inserted between the spacers 18a, 18b, the films 14 are opposite It is not located halfway between the panes 12a, 12b, and one of the spaces 15a, 15b is larger than the other space 15a, 15b. The edge spacers 18a, 18b may be shaped such that the panes 12a, 12b are parallel to each other and to the film 14 when the panes 12a, 12b are attached to the edge spacers 18a, 18b. A primary sealant 16 may be installed between the edge spacers 18a, 18b and the panes 12a, 12b, and a secondary sealant 17 may be installed between the vertical lateral portions of the spacers 18a, 18b to seal the unit 10. It is sometimes set up along the

According to the embodiment of FIG. 4D, the film 14 may be secured directly to the edge spacers 18a, 18b. Film 14 may be adhered to edge spacers 18a, 18b using first sealant 16 or using another adhesive (not shown). Edge spacers 18a, 18b generally extend around the periphery of their respective panes 12a, 12b. The edge spacers 18a, 18b may have identical dimensions in cross-section such that the film 14 is placed equidistantly between the opposing panes 12a, 12b and the spaces 15a, 15b are essentially the same size. . Alternatively, edge spacers 18a, 18b may be arranged so that the film is not placed halfway between opposing panes 12a, 12, but one of the spaces 15a, 15b is larger than the other space 15a, 15b. One of them may be larger than the other. The edge spacers 18a, 18b may be shaped such that the panes 12a, 12b are parallel to each other and to the film 14 when the panes 12a, 12b are attached to the edge spacers 18a, 18b. A primary sealant 16 may be installed between the edge spacers 18a, 18b and the pane 12, with a secondary sealant 17 along the vertical lateral portions of the spacers 18a, 18b to seal the unit 10. It may be provided.

Reference is now made to FIGS. 5A-5C, which illustrate various arrangements for securing support structure 20 to edge spacer 18. FIG. 5A illustrates an arrangement in which the frame 20 holding the film 14 is placed within and/or inside the edge spacer 18. FIG. 5B illustrates an arrangement in which the frame holding the film 14 is dropped into the unit 10 so that the frame is outside the edge spacer 18 and inside the viewing area 13 of the unit 10. FIG. 5C illustrates yet another arrangement in which the frame 20 holding the film 14 is seated internally to the viewing area 13 but is snapped onto the edge spacer 18 using the clips 6.

Film 14 may be annealed prior to or after being securely secured to the support structure. Film 14 is annealed to a relaxed state, and the relaxed state of film 14 has a tension of less than 0.1 lb per linear inch.

Film 14 may be formed from at least one of a polymeric sheet, a thin glass sheet, and/or any other transparent sheet. The polymeric sheet can include reinforcing organic materials. According to one embodiment, film 14 may be a polymeric sheet comprising polyethylene terephthalate (PET). The PET film 14 may have a thickness of 12.7-254 μm (0.5-10 mil), 12.7-127 μm (0.5-5 mil), or even 12.7-54.8 μm (0.5-2 mil). may have. At least one surface of film 14 can include a low-e coating. The insulating glass unit 10 of the present invention provides significantly superior thermal performance over prior art arrangements by including a low-e coating on the glass panes 12a, 12b and/or a film 14 on one or more surfaces. It has been found that performance can be achieved. In particular, the inventive unit 10 has R5 performance with lower cost argon (Ar) and over a wider range of total thickness and R9 performance or better with krypton (Kr) gas. It has been found that this can be done.

According to one embodiment, adhesive 22 may be used to securely secure film 14 to support structure 20 as shown in FIG. 4C. Alternatively, an adhesive may be used to securely secure film 14 to edge spacer 18 (not shown). Adhesive 22 may be any known adhesive, including contact adhesives, pressure sensitive adhesives, UV cure adhesives, thermoset adhesives, or chemically cured adhesives. According to yet another embodiment, film 14 may be secured to edge spacer 18 using primary sealant 16. According to yet another embodiment, the film may be heated to melt and laminate with support structure 20 or edge spacer 18 without the need for adhesives or sealants.

According to one embodiment, and with reference to FIGS. 6A, 6B, 7A, 7B, 8A, and 8B, the film 14 is attached to the support structure 20 or at least one support structure through the use of mechanical members. It may be firmly fixed to the edge spacer 18. The support structure 20 may include a pair of frames 20a, 20b between which the film is sandwiched. According to one embodiment, the frames 20a, 20b include other mechanical fasteners or joining structures (not shown), such as keys or dove tails, an adhesive covering at least a portion of the side members, and It is held together at the corners using transparent panels glued to the side members with adhesive. Another arrangement includes a support frame 20a, 20b having a corner manufactured using a notch in the side and then folding said side to form a corner, an adhesive covering at least a portion of the side member, and It can include a transparent film 14 adhered to the sides by adhesive. According to yet another embodiment, using a frame without corner grips allows extra free space for the film and prevents the film from binding to the corners and forming wrinkles in the film. It has been found to prevent

Film 14 may be attached to a pair of frames 20a, 20b using mechanical clips or other fasteners. Mechanical rigid fixation of the film 14 may be achieved using a key/lock profiled frame pair as described below.

For example, as shown in FIGS. 6A and 6B, the key/lock member may be a plurality of separate cone-shaped members 52a, 52b extending along the edges of the frame members 20a, 20b, and the key/lock members 52a, 52b. , 52b are configured to mechanically engage the film 14 located therebetween. 7A and 7B show a series of key/lock rod shaped rounded members or parallelograms 54a, 54b extending along the length of the edges of frame members 20a, 20b. Figures 8A and 8B show a series of key/lock rod shaped cone members 56a, 56b extending along the length of the edges of frame members 20a, 20b.

With continued reference to FIGS. 2 and 3 and with further reference to FIGS. 9A-9D, a method for forming an insulating glass unit 10 includes a pair of glass panes 12a in parallel, spaced relationship; 12b. Providing at least one film 14 and stretching the film through bend rolling, vacuum rolling, or the use of a nip-roll type wrinkle removal system 30 or any other anti-wrinkle system, as shown in FIG. 9A. Remove wrinkles. This process typically takes less than a minute to complete. The next step in the process involves securing the film 14 to either the support structure 20 or the at least one spacer 18, as shown in FIG. 9B. This step requires several seconds to complete. As shown in FIG. 9C, heat is applied as shown by arrow 34 to anneal film 14 to a relaxed state as shown in FIG. 9D. Although FIG. 9C shows applying heat to the film 14 after the film 14 is securely secured to the support structure 20 or at least one edge spacer 18, annealing the film 14 does not affect the film 14. It may be appreciated that this may be done prior to being securely fixed to the support structure 20 or at least one edge spacer 18. This annealing step may be accomplished in a few minutes, depending on the material used to form film 14. After annealing, the film 14 is installed in spaced parallel relationship between a pair of glass panes 12a, 12b, with or without support structure 20. It is installed between a pair of glass panes 12a, 12b. At least one edge spacer 18 and a primary sealant 16 are provided between adjacent edges of a pair of panes 12a, 12b to provide an integrally sealed unit 10 defining a space 15 between the panes. do. It may be appreciated that steps 9A-9D may be performed on the machine in a distinct motion, whereby any or all of the steps may be performed automatically.

According to one embodiment, the film 14 may be secured directly to at least one edge spacer 18. Alternatively, the film 14 may be rigidly secured to the support structure 20 and the film 14 and support structure 20 may be spaced apart from at least one edge spacer 18, such as where the viewing area of the unit 10 is. It is installed between a pair of glass panes 12a, 12b at a location where the glass panes 12a and 12b are located.

The support structure 20 may include at least one flexible frame member 20a located adjacent an edge of the film 14 or a pair of flexible frame members 20a, 20b sandwiching the edges of the film 14. According to one embodiment, the support structure 20 can include at least one frame member 20a located adjacent the edge of the film 14, the at least one frame member 20a being flexible and having a of sufficient thickness so that it should not lose, or rather maintain its shape, under the weight of. According to one embodiment, an approximately 1/16" thick aluminum frame may be used. The frames 20a, 20b may be formed by a molding process, a stamping process, a 3D printing process, etc. may be formed using any known method including.

Film 14 may be heated to a sufficient temperature and for a sufficient period of time to cause stress-induced crystallization such that the relaxed state of film 14 is 0.1 lb per linear inch. It has the following tension.

The method further includes trimming the film 14 after the film 14 has been annealed to a relaxed state and securely secured to one of the support structure 20 and the at least one edge spacer 18. Film 14 may be trimmed using a knife, blade, laser, or the like. Film 14 may be secured to one of support structure 20 and at least one edge spacer 18 by at least one of a mechanical member, an adhesive, and a thermoplastic welding process. .

It can be appreciated that the film 14 can also include at least one of materials embedded therein or coated on one or both sides to control the transmission and/or reflection spectra. A pattern can be printed on the film 14 either before or after the film 14 is applied to the support structure 20 or spacer 18. The film 14 may be coated with or have an aesthetic material applied to the portions visible to the end user that allows for additional designs that are visually appealing to the end user. good. At least one surface of film 14 can include a low-e coating. According to one embodiment, the optical haze of the unit 10 may be less than 3%, preferably less than 1.5%, and preferably less than 1%, as measured by BK Gardner Hazegard.

The film 14 is also configured to act as a sounding member for the generation of white noise for music, noise canceling acoustics, or for example the obscuration of acoustic pickups by laser reflections of indoor speech. Sometimes. The driving element may be either the film itself (with appropriately placed electrodes) or the film 14 with an attached transducer. The lack of a rigid mechanical attachment to the spacer 18 by the central support structure 20 or the spacer 18 prevents the transmission of acoustic waves to the spacer 18 and reduces the possibility of failure and/or reduces acoustic waves to the surroundings. The use of one or more intermediate films 14 allows to act as an acoustic member without transmitting acoustic waves into the building structure so as to control the area and location of wave emission.

The film 14 may also be optically (visible and/or IR region ) May be designed with thermochromic functionality for passive control of transmission and/or reflection spectra.

Reference is made to FIG. 10A, which shows the optimal temperature determination for the pre-bonding heating (ie, film shrinkage) step. FIG. 10B shows temperature determination using pre-shrink or low shrink films, where no heat stabilized film is required. The thermal profile (ie, temperature vs. time) is such that the film is wrinkle-free and the stress is such that essentially no force is applied to the frame 20 of the spacer 18.

Reference is made to FIG. 11, which shows a graph depicting the optical location for the film 14 for the best thermal performance of the unit 10. As shown in FIG. 11, the best location for film 14 is on the centerline between the inner surfaces of outer glass panes 12a, 12b. However, as shown in FIG. 11, the film 14 can also be placed offset from the centerline between the inner surfaces of the outer glass panes 12a, 12b or from the centerline of the space 15. Yes, and improvements in thermal performance vs. two-panel insulated glazing units can still be achieved.

With continued reference to FIGS. 2-3 and 4A-4D, and with further reference to FIGS. 12A-12D, the pair of glass panes 12 includes a first glass pane 12a and a second glass pane 12a. 12b. A space or first chamber 15a is located between the first glass pane 12a and the first side 14a of the film 14, and a space or second chamber 15b is located between the second glass pane 12b and the film 14. 14 and the second side 14b. The opening allows gas to move between the first chamber 15a and the second chamber 15b to ensure pressure equalization between the first chamber 15a and the second chamber 15b. It may also be provided for the purpose of According to the embodiment shown in FIG. 12A, where the film 14 is integrated with spacers 18a and 18b, an opening 44a may be provided in the film 14. In the embodiment shown in FIG. 12B, where the film 14 is securely secured to the support structure 20 and the support structure 20 and film 14 are internal to the viewing area 13 of the unit 10, the opening 44b It may be provided within the structure 20. In the embodiment shown in FIG. 12C, where support structure 20 and film 14 are located inside spacer 18, openings 44c in the form of multiple openings may be provided within support structure 20. In the embodiment shown in FIG. 12D, the support structure 20 is secured internally to the viewing area 13 of the unit 10 using a clip 46 cooperating with the spacer 18. In this example, an opening 44d is provided within the support structure 20.

Reference is now made to FIGS. 13a and 13b showing the muntin 40. Muntins 40 may be attached to either edge spacers 18 (not shown) or support structures/frames 20a or 20b, or both. Muntins 40 may be attached with or without clips. According to one arrangement, the muntin 40 may be inserted into a notch 42 inside the upper frame 20a and the film 14 may be attached to the lower frame 20b. Alternatively, muntin 40 may be printed on a film.

The invention is further described in the numbered sections below.

Clause 1: a pair of glass panes in parallel and spaced relationship; adjacency of said pair of panes to provide an integrally sealed unit defining a space between said pair of glass panes; at least one edge spacer and at least a main sealant located between the edges of the pair of glass panes; at least one transparent film located within the space between the pair of glass panes; a transparent film is securely secured to one of the support structure and the at least one edge spacer, the film being disposed in spaced parallel relationship between the pair of glass panes; and at least one transparent film, wherein the film is annealed to a relaxed state prior to installing the film between the pair of glass panes.

Clause 2: The insulating glass unit of claim 1, wherein said at least one transparent film is supported by said support structure, said support structure being spaced from said edge spacer.

Clause 3: The insulating glass unit of Clause 2, wherein the support structure comprises at least one frame member located adjacent an edge of the film.

Clause 4: The insulating glass unit according to Clause 3, wherein said at least one frame member is flexible and has a thickness sufficiently large that said frame member should maintain its shape under its weight. .

Clause 5: The insulating glass unit of Clause 4, wherein the at least one frame member is aluminum having a thickness of approximately 1/16".

Clause 6: An insulating glass unit according to any one of clauses 2 to 5, wherein the film is annealed prior to or after securing the film to the support structure.

Clause 7: The insulating glass unit of any one of clauses 1 to 6, wherein the relaxed state of the film has a tension of 45.4 g (0.1 lb) per linear inch or less.

Clause 8: An insulating glass unit according to any one of clauses 1 to 7, wherein the film is heated to an annealing temperature of at least 70°C for approximately 10 minutes.

Clause 9: The insulating glass unit according to any one of clauses 1 to 8, wherein the film comprises at least one of a polymeric sheet, a thin glass sheet, and any other transparent sheet.

Clause 10: The insulating glass unit according to Clause 9, wherein the film is a polymeric sheet comprising polyethylene terephthalate.

Clause 11: Clause 1, wherein said film is securely fixed to said support structure or said at least one edge spacer by at least one of a mechanical member, an adhesive, a primary sealant and by thermoplastic welding. 10. The insulating glass unit according to any one of claims 1 to 10.

Clause 12: The insulating glass unit according to Clause 2, wherein said support structure is rigidly fixed to said edge spacer.

Clause 13: the pair of glass panes includes a first glass pane and a second glass pane, and the support structure is configured to provide pressure equalization between the first chamber and the second chamber. the first chamber located between the first glass pane and the first side of the film; the second glass pane and the second side of the film; An insulating glass unit according to clause 2, configured to allow gas to move between the second chamber and the second chamber located between the insulating glass unit.

Clause 14: Clauses 1 to 13, wherein the film comprises at least one of a material embedded within the film or coated on one or both sides to control the transmission spectrum and/or the reflection spectrum. The insulating glass unit according to any one of the above.

Clause 15: A method for forming an insulating glass unit, the method comprising: providing a pair of glass panes in parallel spaced relation; providing at least one film; removing wrinkles. securing the film to one of a support structure and at least one edge spacer; and annealing the film to a relaxed state. applying heat, said step of annealing said film occurring before or after said step of securing said film to one of said support structure and said at least one edge spacer. applying heat to the film, the support structure and the at least one edge spacer so that the film is placed in spaced parallel relationship between the pair of glass panes; placing said film firmly secured to one of said pair of glass panes between said pair of glass panes; providing an integrally sealed unit defining a space between said pair of panes; and providing the at least one edge spacer and primary sealant between adjacent edges of the pair of panes for the purpose of providing the at least one edge spacer and primary sealant between adjacent edges of the pair of panes.

Clause 16: the film is securely secured to the support structure, and the film and support structure are located between the pair of glass panes at a location spaced from the at least one edge spacer. The method described in Article 15, wherein

Clause 17: The method of Clause 15 or 16, wherein the support structure comprises at least one flexible frame member located adjacent an edge of the film.

Clause 18: The film is heated to a temperature sufficient to cause stress-induced crystallization such that the relaxed state of the film has a tension of no more than 0.1 lb per linear inch. 18. The method according to any one of clauses 15 to 17, wherein the method is heated for a period of time.

Clause 19: trimming the film after the film is annealed to the relaxed state and securely secured to one of the support structure and the at least one edge spacer. , the method according to any one of clauses 15 to 18.

Clause 20: The film is attached to one of the support structure and the at least one edge spacer by at least one of a mechanical member, an adhesive, the primary sealant, and a thermoplastic welding process. A method according to any one of clauses 15 to 19, wherein the method is firmly fixed.

Clause 21: The support structure comprises at least one frame member located adjacent an edge of the film, the at least one frame member being flexible and the frame member retaining its shape under its weight. 21. A method according to any one of clauses 15 to 20, having a thickness that is sufficiently large that it is to be maintained.

Clause 22: The method of Clause 22, wherein the at least one frame member comprises aluminum having a thickness of approximately 1/16".

While this disclosure has been described as having an exemplary design, this disclosure may be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the disclosure using the application's general principles. Moreover, this application does not intend to cover such departures from this disclosure as falling within art-known or customary implementations to which this disclosure pertains and which fall within the scope of the appended claims. It is something to do.

Claims (22)

a pair of glass panes in parallel and spaced relationship;
at least one edge spacer and at least a primary sealant positioned between adjacent edges of said pair of panes to provide an integrally sealed unit defining a space between said pair of glass panes; and,
at least one transparent film located within the space between the pair of glass panes, the at least one transparent film being one of the support structure and the at least one edge spacer; and the film is placed in spaced parallel relationship between the pair of glass panes, the film placing the film between the pair of glass panes. at least one transparent film that is annealed to a relaxed state prior to the insulating glass unit. The insulating glass unit of claim 1, wherein the at least one transparent film is supported by the support structure, and the support structure is spaced from the edge spacer. 3. The insulating glass unit of claim 2, wherein the support structure comprises at least one frame member located adjacent an edge of the film. 4. The insulating glass unit of claim 3, wherein the at least one frame member is flexible and has a thickness sufficient to maintain its shape under the weight of the frame member. 5. The insulating glass unit of claim 4, wherein the at least one frame member is aluminum having a thickness of approximately 1/16". 3. The insulating glass unit of claim 2, wherein the film is annealed prior to or after securing the film to the support structure. The insulating glass unit of claim 1, wherein the relaxed state of the film has a tension of 0.1 lbs per linear inch or less. The insulating glass unit of claim 1, wherein the film is heated to an annealing temperature of at least 70<0>C for approximately 10 minutes. The insulating glass unit of claim 1, wherein the film comprises at least one of a polymeric sheet, a thin glass sheet, and any other transparent sheet. 10. The insulating glass unit of claim 9, wherein the film is a polymeric sheet comprising polyethylene terephthalate. 2. The film of claim 1, wherein the film is secured to the support structure or the at least one edge spacer by at least one of a mechanical member, an adhesive, a primary sealant and by thermoplastic welding. insulated glass unit. 3. The insulating glass unit of claim 2, wherein the support structure is rigidly secured to the edge spacer. the pair of glass panes includes a first glass pane and a second glass pane, the support structure ensuring pressure equalization between the first chamber and the second chamber; between the first chamber located between the first glass pane and the first side of the film and the second glass pane and the second side of the film; 3. The insulating glass unit of claim 2, wherein the insulating glass unit is configured to allow gas to move between the second chamber and the second chamber located therein. Thermal insulation according to claim 1, wherein the film includes at least one of a material embedded within the film or coated on one or both sides to control transmission and/or reflection spectra. glass unit. A method for forming an insulating glass unit, the method comprising:
providing a pair of glass panes in parallel and spaced relationship;
providing at least one film;
stretching the film to remove wrinkles;
securely securing the film to one of a support structure and at least one edge spacer;
applying heat to the film to anneal the film to a relaxed state, wherein the step of annealing the film includes applying heat to the one of the support structure and the at least one edge spacer. applying heat to the film before or after the step of firmly fixing the film;
the film is securely secured to one of the support structure and the at least one edge spacer such that the film is disposed in spaced parallel relationship between the pair of glass panes; placing the film between the pair of glass panes;
providing the at least one edge spacer and primary sealant between adjacent edges of the pair of panes to provide an integrally sealed unit defining a space between the pair of panes; including methods. the film is securely secured to the support structure, and the film and the support structure are located between the pair of glass panes at a location remote from the at least one edge spacer. 16. The method of claim 15. 16. The method of claim 15, wherein the support structure includes at least one flexible frame member located adjacent an edge of the film. The film is heated at a temperature sufficient to cause stress-induced crystallization for a sufficient period of time such that the relaxed state of the film has a tension of 0.1 lb per linear inch or less. 16. The method of claim 15, wherein the method is heated. 5. The method further comprising: trimming the film after the film is annealed to the relaxed state and securely secured to one of the support structure and the at least one edge spacer. The method according to item 15. the film is securely secured to one of the support structure and the at least one edge spacer by at least one of a mechanical member, an adhesive, the primary sealant, and a thermoplastic welding process; 16. The method of claim 15. the support structure includes at least one frame member located adjacent to an edge of the film, the at least one frame member being flexible to maintain its shape under the weight of the frame member; 16. The method of claim 15, having a sufficiently large thickness. 16. The method of claim 15, wherein the at least one frame member comprises aluminum having a thickness of approximately 1/16".

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