CN110894140A - Method for forming insulating impact-resistant composite material - Google Patents

Abstract

A method of forming an insulating impact resistant composite applies a solar control coating to an inner surface of a first glass pane and a low-E coating to an outer surface of a second glass pane. A safety film is coated on the inner surface of the first glass plate. The second glass sheet has a low-E coating facing the interior of the room. The security film is coated on the back of the glass. The two glass sheets are separated by a spacer and structural silicone is backfilled from each outboard end of the spacer to the coated inner surfaces of the first and second glass sheets to form a two pane glass composite.

Description

Method for forming insulating impact-resistant composite material

Technical Field

The invention relates to the field of glass processing equipment, in particular to a method for forming an insulating impact-resistant composite material.

Background

Insulating glazing or door units have been known for many years to reduce the internal housing and environment between heat transfers. To further improve the insulating properties, the present technology teaches the fabrication of solar control coatings and low emissivity (low E) coated glass or films. Solar control is a term describing the property of regulating solar energy, allowing solar energy to pass through a glazing into an enclosed space, such as a building or an automobile interior. Low emissivity is a term describing the surface characteristics of an article in which absorption and emission of mid-range infrared radiation is suppressed such that the surface becomes a mid-range infrared reflector, thereby reducing heat flux through the article by attenuating the radiation component of he. After transfer to the low emissivity surface. By suppressing solar heat gain, building and car interiors remain cool, allowing for reduced air conditioning requirements and costs. High efficiency low emissivity coatings improve summer and winter comfort by increasing the thermal insulation properties of the window. Two typical methods of making solar control and low-e coatings are "on-line" and "off-line" coatings. The on-line method uses a chemical deposition process including doping with different chemicals to produce the infrared absorbing layer and the low E layer, as described in the us patent. 5750265, 5897957 and 6218018. The off-line method uses a sputter deposition method to prepare two coatings.

Disclosure of Invention

It is an object of the present invention to overcome the above-mentioned deficiencies of the prior art and to provide a method of forming an insulating impact resistant composite that meets solar control standards by applying a solar reflective coating to the outer surface of a pane.

The technical scheme of the invention is as follows: the steps include coating an inner surface of a first glass sheet with a solar control coating; laminating a first security film over the coating, the first security film extending to all edges of the first glass sheet; coating the outer surface of the second glass sheet with a low E coating; a laminated second security film 20 on the inner surface of the second glass panel; facing the first and second rupture films of the first and second glass panels with a spacer interposed between the inner surfaces of the first and second glass panels; maple to the security film side of the first and second glass sheets to form a two-sheet glass composite while filled with an inert gas; the polyethylene terephthalate film is provided in multiple layers, the security film having a thickness of 0.004 to 0.025 inches.

The rupture disk had a thickness of 0.008 to 0.018 inches.

An acrylic-based pressure sensitive adhesive is applied between the film layers.

The method provides low E coated glass with visible light transmission between 36-95%.

A method of forming an insulating impact resistant composite for use in a window frame, the steps comprising coating an inner surface of a first glazing with a solar control coating of a predetermined thickness; laminating a first security film over the coating, the first security film extending to all edges of the first glazing; coating the outer surface of the second glazing with a predetermined thickness of a low E coating; laminating a second security film 20 to the opposite side of the second pane; orienting the security films of the first pane and the second pane toward each other while interposing the spacer between the first pane and the second pane into the interior surface; and backfilling the structure with a hard adhesive from an outside edge of the spacer to the rupture disk side of the first and second glazings to form a two glazing composite while filled with an inert gas.

The invention has the beneficial effects that: the problem that the coating cannot be placed on the outer surface due to window scratching caused by environmental aging, chemical reaction, cleaning or scraping is solved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

In fig. 1, a solar control coating 12 is applied to the inner surface 2 of a first glass pane 14. The coating may be prepared by sputter deposition or chemical deposition methods. The sputtered coating has a layer of silver or other infrared reflective metal sandwiched by a layer of metal oxide. This coating reflects more infrared than it absorbs. The metal composite provides a glazing having high visible light transmission and low visible light reflection as well as low E performance. Therefore, it is an ideal hot mirror product. Chemical vapor deposition coatings have better chemical and scratch resistance than sputter coated products. It will absorb solar energy rather than reflect it. It can therefore create thermal stress on the glass sheet and can lead to glass breakage. Another disadvantage is that it has a lower visible light transmittance than sputter coated glass to achieve similar solar performance. A security film 16 is laminated to the sputter coating 12 on the surface 2 to re-strengthen the glass and protect the metal from corrosion and other chemical reactions during aging. However, once laminated with a security film, it can destroy or significantly reduce the low-E properties. The security film 16 is formed by laminating three layers of transparent PET film with a pressure sensitive adhesive. The thickness of the rupture disk is 0.004 to 0.025 inches. Preferably 0.008 to 0.018 inches thick, and most preferably 0.015 inches thick. The adhesive is of the acrylic-based pressure sensitive type. The coating weight of the mounting adhesive for bonding the security film to the glass is between 12 and 17 pounds per mile. The multilayer structure is better than a monolayer PET film because it improves the impact resistance of the film. Multilayer films have good impact resistance, but multilayer laminates can suffer from distortion problems. To meet the low-E requirement, a low-E coated glass film 18 must be used. The function of the low-E coating 18 is to reflect mid range infrared light and reduce the heat flux through the glazing. The coating faces the interior of the room above the glass surface 4 as shown in figure 1. Preferred low-E coatings are chemically deposited on glass. The E value is 0.03-0.25, preferably the E value is 0.08-0.20. Most preferably, the E value is 0.17 or less. The low-e glass has a Visible Light Transmission (VLT) of 35-90%. The preferred VLT is 60-85%. The most preferred VLT is 80%. The preferred color is neutral or greenish. The security film 20 is laminated on the inner surface 3 of the glass 22 to re-implement the inner glass. The insulated glass unit 10(IG unit) is configured as follows. The security film 16 is laminated to the solar control coated surface 12 of the outer pane 14 by a laminator. A clean room environment is necessary. A second security film 20 is laminated to the uncoated surface of the inner pane 22. Spacers 24 are positioned on the rupture disk 16 on the four edges of the first pane of glass 14. The second glass pane 22 overlaps the first glass pane, on the inner surface of the first glass pane 14, with the security film 20 facing the security film 16. The four sides are sealed with a suitable sealant, such as BuffTor or silicone sealant. The IG unit is filled with argon gas 26 to improve insulation. The final configuration shown in fig. 1 is with the solar control coating 12 on the inner surface 2 of the outer glass 14 and the low E coating 18 on the outer surface 4 of the glass 22 facing the interior of the room. Security films 16 and 20 are located on inner surfaces 2 and 3 of glasses 14 and 22, respectively. The outer solar control glass panel 12 and inner low E glass panel 22 were laminated with 15 mil safety films on surfaces 2 and 3, respectively, and tested using a permin Elmer Lambda 900 uv/vis/nir spectrometer. Emissivity was measured with a digital voltmeter. The data is input into the window 5 program for analysis of the thermal properties of the window. The software was developed by the lawrence berkeley national laboratory. The results are shown in Table 1. The U value is the amount of thermal energy transferred through one square foot of a particular glass system every 1 ° F temperature difference between indoor and outdoor air. The lower the u-value, the better the insulating properties of the glazing system. Solar thermal gain coefficient (SHGC) is a measure of the percentage of solar energy that is directly transmitted or absorbed and then re-radiated into a building. The lower the coefficient, the more the window can reduce solar heat.

Claims (5)

1. A method of forming an insulating impact resistant composite, characterized by: the steps include coating an inner surface of a first glass sheet with a solar control coating; laminating a first security film over the coating, the first security film extending to all edges of the first glass sheet; coating the outer surface of the second glass sheet with a low E coating; a laminated second security film 20 on the inner surface of the second glass panel; facing the first and second rupture films of the first and second glass panels with a spacer interposed between the inner surfaces of the first and second glass panels; maple to the security film side of the first and second glass sheets to form a two-sheet glass composite while filled with an inert gas; the polyethylene terephthalate film is provided in multiple layers, the security film having a thickness of 0.004 to 0.025 inches.

2. The method of forming an insulating impact-resistant composite material of claim 1, wherein: the rupture disk had a thickness of 0.008 to 0.018 inches.

3. The method of forming an insulating impact-resistant composite material of claim 1, wherein: an acrylic-based pressure sensitive adhesive is applied between the film layers.

4. The method of forming an insulating impact-resistant composite material of claim 1, wherein: the method provides low E coated glass with visible light transmission between 36-95%.

5. A method of forming an insulating impact resistant composite for use in a window frame, characterized by: the steps include coating an inner surface of a first glazing with a solar control coating of a predetermined thickness; laminating a first security film over the coating, the first security film extending to all edges of the first glazing; coating the outer surface of the second glazing with a predetermined thickness of a low E coating; laminating a second security film 20 to the opposite side of the second pane; orienting the security films of the first pane and the second pane toward each other while interposing the spacer between the first pane and the second pane into the interior surface; and backfilling the structure with a hard adhesive from an outside edge of the spacer to the rupture disk side of the first and second glazings to form a two glazing composite while filled with an inert gas.

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