DE8906162U1 - Laminated glass panel with alarm device - Google Patents

Description

Applicant: GLaswerke Arnold GmbH & Co KG Title: Laminated glass panel with alarm device

Utility model

The innovation concerns a laminated glass panel with an aeration device, in which a safety glass pane consists of a prestressed glass material that crumbles when broken and is provided with a printed, metallic conductor loop on one inner surface in a corner area, in which the safety glass pane is connected on the inner surface to a second pane by means of a plastic adhesive layer, the plastic material of which is optically transparent, UV-resistant and a hot melt adhesive processed at a melting or bonding point below 150° C, and in which the bonding of the safety glass pane is provided essentially over the entire surface , leaving out the corner area provided with the conductor loop.

In a laminated glass panel of this type, which is known from practice, the bonding recess is achieved by omitting the ( ) plastic adhesive layer in the corner area. This adhesive layer recess is visible at the edge of the adhesive layer. The area without the adhesive layer is visually different from the area with the adhesive layer. In the corner area between the safety glass pane and the second pane, moisture can get into the space left free by the adhesive layer, which leads to corrosion damage to the conductor loop.

One of the objectives of the innovation is therefore to create a laminated glass panel of the type mentioned above, in which the bonding freedom of the corner area provided with the conductor loop is optically unobtrusive and tightly covered by the

Conductor loop is provided. This is achieved by covering the corner area provided with the conductor loop with a separating film piece that rests loosely on the conductor loop and the safety glass pane and is covered by the plastic adhesive layer, by the inserted separating film piece consisting of a plastic material that is UV-resistant, optically transparent and has a melting or adhesive point of over 150° C, and by the separating film piece being embedded in the adhesive layer and having a thickness that is a maximum of 1/4 of the thickness of the adhesive layer outside the corner area.

, "\ Due to the looseness of the separating film piece, the safety glass pane will crumble into crumbs if it is damaged in the corner area, even with the new laminated glass panel, which interrupts the conductor loop and triggers an alarm. Due to the plastic material of the separating film piece, it is visually inconspicuous despite the glass bonding process, which takes place under pressure and heat. Despite the looseness of the separating film piece, no moisture can reach the conductor loop. The separating film piece is firmly and securely attached to the laminated glass pane because it is embedded, which is achieved by the small thickness of the separating film piece in relation to the adhesive layer.

&igr;; When producing the laminated glass panel according to the innovation, which is usually rectangular, a melting film is placed between the safety glass pane and the second pane, which is also usually a glass pane. A transparent, die-cut piece of separating film is then placed between the safety glass pane and the melting film in the corner area. The entire layering is treated in an autoclave process under pressure and at an elevated temperature, whereby the melting film merges into the plastic adhesive layer, while the piece of separating film remains unchanged. While the piece of separating film is e.g. 100 μπι thick, the adhesive layer is e.g. 0.76 mm thick.

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The feature of claim 2 promotes the separation of the conductor loop if the safety glass pane breaks, since the adhesive layer in the area of the conductor loop is loose and flexible. The thickness according to claim 3 is sufficiently strong and does not add too much bulk.

The design according to claim 4 is generally aimed at

The separating film is usually colourless.

Claim 5 is to prevent the penetration of moisture better.

The design according to claim 6 also promotes the breakage of the conductor loop if the safety glass pane breaks. In claim 7, typical plastic materials are mentioned as examples of the innovation.

The release film and the adhesive layer are not firmly bonded to one another, but are only attached in a removable manner due to breakage. It is irrelevant whether the adhesive layer was created by laying down an adhesive film or applying an adhesive compound.

The drawing shows a preferred embodiment of the innovation and shows Fig. 1 a plan view with cutaways of a piece of a VeP= Bundglasplatte with alarm device and

Fig. 2 is a front view of the piece of laminated glass panel according to Fig. 1.

The laminated glass panel according to the drawing comprises a safety glass pane 1, which is a so-called toughened single-pane safety glass. In a corner area 2 of the safety glass pane 1, a conductor loop 3 is printed, which consists of a silver-coated conductor and comprises a loop conductor A and connecting pieces 5. The corner area 2 is covered with a pre-punched, rectangular piece of separating film 6. The safety glass pane 1 including the corner area 2 is covered with a plastic adhesive layer 7, which in the corner area 2

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forms a depression or a bed 8 in which the separating film piece 6 lies without being glued to the adhesive layer 7. The plastic adhesive layer 7, on the other hand, grips another pane 9 made of glass. In the corner area 2, a separating film piece 10 is inserted between the adhesive layer 7 and the other pane 9 to form a bed 11. Both separating film pieces 6, 10 leave out an edge strip 12 and protrude beyond the conductor loop 3 with a projection 13.

Claims (1)

1. Laminated glass panel with alarm device, in which a safety glass pane consists of a tempered glass material that crumbles when broken and has a printed metal conductor loop on an inner surface in a corner area, in which the safety glass pane is connected on the inner surface to a second pane by means of a plastic adhesive layer, the plastic material of which is optically transparent, UV-resistant and a hot-melt adhesive processed at a melting or bonding point below 150 °C, and in which the bonding of the safety glass pane is provided essentially over the entire surface , excluding the corner area provided with the conductor loop,
characterized, that the corner area provided with the conductor loop (3) <2) is covered with a piece of separating film (6) lying loosely on the conductor loop (3) and the safety glass pane (1) and is covered by the plastic adhesive layer (7), that the inserted separating film piece (6) consists of a plastic material that is UV-resistant, optically unchanged and transparent and has a melting or adhesive point of over 150° C, and däi) uäs separating agent \ &sgr; ) In ule adhesive layer u ) S1ny6 ⁼ &igr; embedded (8) and having a thickness of not more than 1/4 of the Thickness of the adhesive layer (7) outside the corner area (2) is. 2. Laminated glass panel according to claim 1, characterized in that parallel to the separating film piece (6) on the conductor loop (3) between the plastic adhesive layer (7) and the second pane (9), a second separating film piece (10) is provided, embedded (11) in the adhesive layer (7) and has a thickness which is at most 1/4 of the thickness of the adhesive layer (7) outside the corner region (2). 3. Composite oil plate according to claim 1 or 2, characterized in 1*11 I·*»· if 41 It is characterized in that the separating piece (6, 10) is 20 - 60μα thick. A. Laminated glass panel according to claim 1, 2 or 3, characterized in that the separating film piece (6, 10) is clearly transparent. &Ggr;». Laminated glass panel according to one of the preceding claims, characterized in that the separating film piece (6, 10) leaves out the edge strip (12) of the corner region (2). 6. Laminated glass panel according to one of the preceding claims, characterized in that the separating film piece (6, 10) projects laterally considerably beyond the conductor loop (3) in its surface area (13). 7. Composite glass panel according to one of the preceding claims, characterized in that the plastic material of the adhesive layer (7) is polyvinyl butyric and the plastic material of the separating film piece (6, 10) is polyester.