Hollow glass flexible spacer and method of producing the same

Abstract

The hollow glass flexible spacer and its production method belong to the technical field of hollow glass spacer, and particularly to a flexible spacer for sealing hollow glass and its production method. The flexible spacer and its production method are low in cost and not easy to deform due to thermal expansion and contraction of gas in the hollow glass. The flexible spacer comprises a support body, and the support body is externally provided with a colloid.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of hollow glass spacer, and particularly relates to a flexible spacer for sealing hollow glass and a production method thereof. BACKGROUND

[0002] There are various forms of hollow glass edge sealing, and generally, a first sealing is formed by coating a spacer with butyl glue, and a second sealing is formed by a chemically solidifiable elastomer sealing glue such as silicone structural sealing glue or polysulfide sealing glue. The spacer used as the first sealing is divided into a steel spacer and a flexible spacer. The steel spacer has the disadvantage of complex process, resulting in high labor cost. The process is as follows: frame making + dry agent particle filling + butyl glue coating + frame mounting, etc. The flexible spacer overcomes the disadvantage of the steel spacer, and can be directly placed at the glass edge during the production of the hollow glass, which is convenient and fast. The flexible spacer contains dry agent, can absorb the water molecules inside the hollow glass, and the part in contact with the glass is pre-coated with butyl sealing glue. When the hollow glass is produced, the automatic spacer placing device can be used to realize automatic production, save labor cost, and improve production benefit.

[0003] The existing flexible spacer and product include "super spacer" and "TPS edge sealing system". The "super spacer" is a flexible warm edge spacer made by extrusion technology, which is hot, elastic, and has a microporous structure, contains silica gel dry agent, and is attached with a moisture barrier film on the back. When the hollow glass is produced by using the "super spacer", the part in contact with the glass is pre-coated with butyl sealing glue as the first sealing. The second sealing glue is silicone structural glue. The moisture barrier film is chemically solidified and bonded with the super spacer glue in advance, and the moisture barrier film is made of high molecular material which can produce chemical bonding with the second sealing glue. However, the high cost of the "super spacer" is its disadvantage.

[0004] The above two products are 5-10 times as expensive as the traditional aluminum spacer per meter. There is another flexible spacer in the market of hollow glass material, which is a hollow glass composite glue strip meeting the requirements of the standard JC / T1022-2007 "Composite Sealing Strip for Hollow Glass". The composite glue strip is generally used as a single sealing system. Since the composite glue strip does not have a structure, the composite glue strip will deform under the action of thermal expansion and cold contraction of the gas inside the hollow glass. Some hollow glass production plants attempt to use the composite glue strip as the first sealing and coat the silicone structural sealing glue on the outside as the second sealing. As a result, since the butyl sealing glue and the silicone structural sealing glue do not have adhesion, the composite glue strip as the first sealing will be displaced under the action of thermal expansion and cold contraction of the gas inside the hollow glass, resulting in internal absorption. Figure 9As shown, the negative pressure causes internal absorption phenomenon. In order to improve the defects of composite sealing strip, some enterprises imitate the structure of "super spacer" and paste a layer of moisture-proof film at the bottom of the composite sealing strip to achieve the effect of super spacer. For example, the utility model patent CN201620097729.X introduces "a composite spacer for warm edge insulating glass". Figure 10a , Figure 10b As shown, due to the fact that the moisture-proof film and the butyl sealant cannot produce firm chemical curing adhesion, the butyl sealant and the moisture-proof film and the second sealant are separated under the action of the negative pressure inside the insulating glass, and internal absorption phenomenon occurs as shown in Figure 11a 、 Figure 11b .

[0005] US8230661 and CN201620097729.X show a composite insulating glass sealing strip, as shown in Figure 12 . The patent also shows the presence of an aluminum film.

[0006] The role of the aluminum film is to prevent water vapor from penetrating into the insulating glass, and the patent mainly uses a wave-shaped aluminum strip and a second sealant. It should be noted that the sealing strip product shown in the patent has a wave-shaped aluminum strip structure at the back, which causes the adhesive area to be small and the adhesive strength to be insufficient. Now it is mainly used as a single seal for insulating glass.

[0007] Therefore, the composite insulating glass sealing strip is usually used as a single seal in appropriate places. Therefore, the field of insulating glass deep processing needs a flexible spacer that is cheap and good in quality and can be popularized for double sealing of insulating glass. SUMMARY

[0008] The present application is aimed at the above problems, and provides a flexible spacer with low cost and not easy to be deformed by the thermal expansion and contraction of the gas inside the insulating glass, and a production method thereof.

[0009] In order to achieve the above purpose of the present application, the present application adopts the following technical scheme. The flexible spacer of the present application comprises a support body and a glue body arranged outside the support body, characterized in that: one side surface of the support body is an adhesive surface, and the adhesive surface is exposed on one side of the glue body.

[0010] As a preferred scheme of the present application, the support body comprises a long strip-shaped support strip and an adhesive film, and the two long sides of the adhesive film are provided with bent edges corresponding to the two long sides of the support strip; a bonding glue is arranged between the adhesive film and the support strip, and the outer side of the adhesive film is an adhesive surface exposed on one side of the glue body.

[0011] Further, the edge of the bent edge is provided with an inwardly bent edge.

[0012] Further, the bonding film, the bending edge and the wrapping edge are provided with bonding glue between the bonding film and the support body.

[0013] Further, the bonding film is composed of an aluminum foil film layer and a PET plastic layer, and the aluminum foil film layer has a bonding surface on one side.

[0014] Further, the included angle between the wrapping edge and the bending edge is α, and 90°<α<180°.

[0015] Further, the wrapping edge and the support tape are provided with a support glue part, and the support glue part is extruded from the bonding glue on the surface of the bonding film.

[0016] The production process of the flexible spacer strip is characterized by comprising the following steps.

[0017] 1) Covering the bonding glue on the inner surface of the bonding film.

[0018] 2) Placing the support tape on the surface of the bonding glue.

[0019] 3) Bending the long edge of the bonding film towards the support tape to form a bending edge.

[0020] 4) Bending the bending edge again towards the support tape to form a wrapping edge.

[0021] 5) During the bending process of the wrapping edge, the bonding glue is extruded between the wrapping edge and the support tape to form a support glue part.

[0022] 6) Providing glue outside the combination of the bonding film, the support tape and the bonding glue, and exposing the outer surface of the bonding film as a bonding surface.

[0023] The present application has the following advantages.

[0024] The flexible spacer strip is provided with a bare bonding surface on one side, and after the double-layer glass is combined, the bonding surface is glued and sealed again. The secondary sealing glue can be well bonded with the bonding surface, and when the negative pressure is generated in the double-layer glass, the close combination of the support body and the secondary sealing glue can avoid the deformation of the flexible spacer strip caused by internal suction.

[0025] The bonding film is provided with a bending edge, which can increase the bonding strength of the bonding film and the support tape, and avoid the separation of the bonding film and the support tape.

[0026] The present application further provides a wrapping edge, which can extrude a support glue part between the wrapping edge and the support tape during the bending process. After the support glue part is solidified, the wrapping edge and the support tape are solidified as a whole, which can greatly increase the overall strength of the support body, and make the support body not easy to fall down, thereby improving the stability of the flexible glue strip and facilitating the mechanized production of the double-layer hollow glass.

[0027] The adhesive film of the present application is composed of an aluminum foil film layer and a PET plastic layer; the aluminum foil film serves as an adhesive surface to tightly combine with secondary sealant, while the PET plastic layer can tightly combine with the bonding glue, so that the adhesive film, the bonding glue and the support tape are tightly combined; the bending edge and the edge of the support body are combined with the glue, so that the flexible spacer strip of the present application becomes an inseparable whole structure, and fundamentally eliminates the occurrence of the spacer strip being absorbed.

[0028] In the production method of the flexible spacer strip of the present application, the edge folding mode is used to form a support glue part between the edge and the support tape; the bonding glue constituting the support glue part has a certain strength, which can avoid the spacer strip from being tilted, the production method of the flexible spacer strip of the present application is simple, through one edge folding action, combined with the flowability of the bonding glue, a process residual structure is formed as a support at the edge, which can greatly reduce the production difficulty and improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic diagram of the present application.

[0030] Figures 2 to 8 is a structural schematic diagram of different embodiments of the flexible spacer strip of the present application.

[0031] Figure 9 is a structural schematic diagram of the existing technology when the adhesive strip is absorbed.

[0032] Figure 10a is a structural schematic diagram of the technical solution recorded in the application number: CN201620097729.X.

[0033] Figure 10b is a structural schematic diagram of the technical solution recorded in the application number: CN201620097729.X.

[0034] Figure 11a is a structural schematic diagram of the technical solution recorded in the application number: CN201620097729.X when the absorption occurs.

[0035] Figure 11b is a structural schematic diagram of the technical solution recorded in the application number: CN201620097729.X when the absorption occurs.

[0036] Figure 12 is a structural schematic diagram of the technical solution recorded in the US patent application: US8230661.

[0037] Figure 13 is a use state diagram of the present application.

[0038] In the drawing, 1 is a support body, 2 is a glue body, 3 is a support tape, 4 is an adhesive glue, 5 is an adhesive surface, 6 is an adhesive film, 7 is a bending edge, 8 is an edge covering, 9 is a support glue part, and 10 is an arc-shaped groove.

[0039] Figure 9 In the drawing, 11 is an inner suction part of the glue strip, 12 is a hollow glass sealing glue strip, and 13 is glass.

[0040] Figure 11a 、 Figure 11b In the drawing, 13 is glass, 14 is a spacer strip as described in the application number CN201620097729.X, 15 is an inner suction damage part, 16 is a moisture-proof film, and 17 is a secondary sealing glue.

[0041] Figure 13 In the drawing, 13 is glass. DETAILED DESCRIPTION

[0042] The flexible spacer strip of the present application comprises a support body 1, and the support body 1 is externally provided with a glue body 2, characterized in that one side surface of the support body 1 is an adhesive surface 5, and the adhesive surface 5 is exposed on one side of the glue body 2.

[0043] As a preferred scheme of the present application, the support body 1 comprises a long strip-shaped support tape 3 and an adhesive film 6, and bending edges 7 corresponding to the two long edges of the support tape 3 are arranged at the two long edges of the adhesive film 6; a bonding glue is arranged between the adhesive film 6 and the support tape 3, and the outer side of the adhesive film 6 is the adhesive surface 5 exposed on one side of the glue body 2.

[0044] Further, the edge of the bending edge 7 is provided with an inwardly bent edge covering 8.

[0045] Still further, the bonding glue is arranged between the adhesive film 6, the bending edge 7, the edge covering 8 and the support body 1.

[0046] Further, the adhesive film 6 is composed of an aluminum foil film layer and a PET plastic layer, and one side of the aluminum foil film layer is the adhesive surface 5.

[0047] Further, the included angle between the edge covering 8 and the bending edge 7 is α, and 90° < α < 180°.

[0048] Still further, the edge covering 8 and the support tape 3 are provided with a support glue part 9, and the support glue part 9 is formed by extending and extruding the bonding glue on the surface of the adhesive film 6.

[0049] Still further, α is most suitable when it is close to or equal to 135°. Figure 13The flexible spacer strip is shown in the working condition when the angle α is 135° and the strip is pressed. When the flexible spacer strip is used to make the hollow glass, the roll press or the plate press applies pressure to the two glass sheets, and the butyl sealant of the spacer strip flows from the area with high pressure to the area with low pressure. The angle α formed by the edge covering 8 and the bent edge 7 guides the directional flow of the sealant, so that the spacer strip remains stable when it is pressed by the press.

[0050] The bonding surface 5 can be embedded in the sealant 2 or protrude out of the sealant 2.

[0051] When the bonding surface 5 protrudes out of the sealant 2, the arc-shaped grooves 13 are arranged on both sides of the bonding surface 5. The arc-shaped grooves 10 increase the bonding strength between the spacer strip and the two sealants.

[0052] The angle between the edge covering 8 and the bent edge 7 can also be 90° as shown in Figure 3 、 Figure 4 When the angle between the edge covering 8 and the bent edge 7 is 90°, the edge covering 8 can completely cover the support strip 3 or only leave a gap as shown in Figure 4

[0053] The sealant 2 can use butyl sealant material.

[0054] As shown in Figure 8 , the part of the sealant 2 in contact with the glass on both sides is butyl sealant 11 with sealing function; the part of the sealant 2 located in the cavity of the hollow glass on one side is butyl sealant 12 with water vapor adsorption function, and the central part of the sealant 2 is butyl sealant 13 with enhanced support function.

[0055] The support strip 3 can be a metal strip with certain strength, such as an aluminum strip or a stainless steel strip, etc. It can also be a high polymer material that meets the strength requirement. The support strip 3 can be a flat strip body or a wave-shaped strip body.

[0056] The bonding film 6 can also be a plastic film with enhanced function. The plastic film can have good bonding strength with the two sealants.

[0057] The production process of the flexible spacer strip comprises the following steps:

[0058] 1) Cover the bonding glue on the inner surface of the bonding film 6.

[0059] 2) Place the support strip 3 on the surface of the bonding glue.

[0060] 3) Bend the long edge of the bonding film 6 along the edge of the support strip 3 towards the support strip 3 to form the bent edge 7.

[0061] 4) Bend the bent edge 7 again towards the support strip 3 to form the edge covering 8.​

[0062] 5) In the folding process of the edge 8, the combined glue is extruded between the edge 8 and the supporting tape 3 to form a supporting glue part 9;

[0063] 6) The glue 2 is arranged outside the combination of the adhesive film 6, the supporting tape 3 and the adhesive glue 4, and the outer side of the adhesive film 6 is exposed as the adhesive surface 5.

[0064] In the production of the hollow glass flexible spacer of the present application, the hollow glass sample block is sent to the experimental center of the company for inspection. The inspection standard is GB / T11944-2012 "Hollow Glass". The inspection report is as follows: Inspection Report

[0065]

[0066] It can be understood that the above specific description of the present application is only used to illustrate the present application and is not limited to the technical solutions described in the embodiments of the present application. Those skilled in the art should understand that the present application can still be modified or replaced equivalently to achieve the same technical effect; as long as the use needs are met, it is within the protection scope of the present application.

Claims

1. A flexible spacer for insulating glass, comprising a support body (1) and an adhesive (2) disposed outside the support body (1), characterized in that: One side surface of the support (1) is an adhesive surface (5), which is exposed from the side of the colloid (2); the support (1) includes a long strip support strip (3) and an adhesive film (6), and the two long sides of the adhesive film (6) are provided with bent edges (7) corresponding to the two long sides of the support strip (3); a bonding adhesive is provided between the adhesive film (6) and the support strip (3), and the outer side of the adhesive film (6) is the adhesive surface (5) exposed from the side of the colloid (2); the edge of the bent edge (7) is provided with an inward bend. The edge (8) is provided with adhesive; the adhesive film (6), the bent edge (7) and the edge (8) are all provided with adhesive between them and the support strip (3); the adhesive film (6) is composed of an aluminum foil film layer and a PET plastic layer; one side of the aluminum foil film layer is the adhesive surface (5); the included angle between the edge (8) and the bent edge (7) is α, 90° < α < 180°; a support adhesive part (9) is provided between the edge (8) and the support strip (3); the support adhesive part (9) is formed by extending and extruding the adhesive on the surface of the adhesive film (6); The adhesive surface (5) is configured to protrude from the colloid (2); The adhesive surface (5) protrudes out of the colloid (2), and arc-shaped grooves (10) are provided on both sides of the adhesive surface (5).

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