DE2238597A1 - PROCESS FOR NON-RELEASABLE FASTENING OF RUBBER FRAMES TO GLASS PANELS - Google Patents

Description

VE 215

Applicant: Glas- und Sniegelmanufaktur N. KINON GmbH 51 Aachen, Jüllcherstraße 495

Procedure for the permanent fastening of surrounds made of rubber on glass panes

The invention relates to a method for the permanent fastening of surrounds made of natural or synthetic rubber-like Materials on glass panes in which the permanent connection takes place during heat treatment «,

In a known method of this type for attaching an enclosure to laminated glass panes (DT-PS 1 195 618) is a fully vulcanized, given shape rubber surround used between the glass and the. Rubber edging Adhesive such as epoxy resin or a strip of thermoplastic polyvinyl butyral film interposed, and the Bonding between the bezel and the glass is made during the overpressure heat treatment as it is during manufacture of laminated safety glass is required. The known method is primarily used to cut glass panes. for motor vehicles to be provided with the rubber frame with which they are used in the body, and which are usually a have a complicated profile.

In this known method it is necessary first

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one cut to the size and shape of the pane of glass Manufacture rubber edging. However, this measure is uneconomical when manufacturing individual panes of glass or small series.

While in the case of motor vehicle windows it is important that the rubber border has a certain profile and does not lose its shape, it is not necessary in other cases. This applies, for example, to all those cases In where the glass panes are clamped at the edge in a metal frame be, the seal by both t; Lges bracing of the frame against the elastic rubber acc will. This type of installation of glass panes is common in shipbuilding, for example, for glazing high-speed vehicles Vehicles such as locomotives and railroad cars, and in many cases also with stationary glazing. In all In these cases it is usually important to prevent water or moisture from penetrating through a suitable rubber surround to prevent at the edge of the glass pane.

The invention is based on the object of a method for To create permanent attachment of rubber-like surrounds to glass panes, on the one hand the need own previous :. Manufacturing stage for the edging bypasses itself, and on the other hand an absolutely self-contained profile band that is adapted to the disk circumference creates that has a high adhesive bond with the glass.

This object is achieved according to the invention in that strips made of non-crosslinked rubber, so-called raw gunmi or Raw rubber, with the interposition of adhesion promoters around the edge areas of the glass pane to be framed.

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lays v / earth, and in the course of the heat treatment-at the same time vulcanization of the raw rubber or raw rubber strips onto the glass surface, the vulcanization of the raw rubber or raw rubber strips of the raw rubber, as well as the tight connection of the adjoining Seams of the rubber or caoutchouc strips take place with one another.

It has been shown that this process can be carried out extremely economically. It leads to an edging that is to a certain extent one-piece with the glass pane, which meets all of the requirements placed on it. The process can be used for both monolithic and multilayer glass. When used for multilayer glass, it is particularly useful to carry out the vulcanization in the course of the same heat treatment that is required for connecting the individual layers to one another, and which is usually carried out at a temperature between ΛΛ 5 ° and 150 ° C. in a pressure autoclave.

Adhesion promoters between the rubber and the glass during vulcanization are, for example, known ones Reaction primer.

According to an advantageous development of the new method, the adhesion promoters are applied before the raw rubber strips only on the edges and the edge areas of the glass surfaces adjoining the glass edges over a width applied from a few millimeters, while the raw rubber strips themselves are much wider. This is limited the firm adhesion between the frame and the glass on this edge area. The advantage of this design is aform is that nach'dem insertion of the glass pane in the frame the part of the edging that extends beyond the frame

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cut through the length of the frame and effortlessly from the pane of glass can be removed. This gives the installed glass pane a clean appearance.

When producing laminated glass, it can be useful not to apply any adhesion promoter to the edge of the glass itself. In this way, there is no significant impediment to any degassing of the intermediate layer that may have to be carried out because the air can then escape between the glass edges and the non-stick rubber.

If necessary, it is also possible during the vulcanization process To create certain profiles of the edging by applying the appropriate shaping to the raw rubber strips Agents come into effect during the vulcanization process.

The use of the new method in the manufacture and installation of electrical equipment has proven to be particularly advantageous Heatable laminated glass panes have been shown to have the electrical heating wires in the thermoplastic adhesive layer between are embedded in the glass panes. Such glasses are particularly sensitive to edge injuries and against penetrating moisture, and the method according to the invention has proven itself to be excellent here.

The figures, on the basis of which two different exemplary embodiments are described, serve to further explain the invention in

1 shows the frame of a laminated glass pane, and

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Fig. 2 shows the edging of a monolithic pane of glass and its installation in one Frame.

The two silicate glass panes 1, 2 are put together at room temperature with a film made of polyvinyl butyral and pre-pressed at a temperature of about 5 ° C. with the application of pressure, for example by pressure rollers. As a result of this pre-pressing, on the one hand, the air trapped between the layers is largely expelled, and on the other hand, a preliminary bonding of the layers is achieved, which facilitates their handling. This pre-pressed layer arrangement is now provided on the edge with an adhesion promoter layer 4-. The adhesion promoters or reaction primers are low-viscosity, brushable or sprayable commercial solutions that allow the raw rubber to be vulcanized. It may be advisable to apply two or more adhesion promoter layers of the same or different composition one after the other.

A 1 to 4 mm thick and 2o to 5 ° n ™ ¹ wide raw rubber strip 5 made of non-crosslinked natural or synthetic rubber is then placed over this edge area prepared in this way and pressed onto the glass pane. The raw rubber strip is pulled around the entire glass pane, and both Ends are pressed against each other. The entire unit is then heated in an autoclave to a temperature of about 115 ° to 150 ° C., the pressure in the autoclave being increased to about 10 atmospheres at the same time. In this overpressure heat treatment, on the one hand the layer arrangement 1, 2, 3 is connected to form the finished laminated glass pane. On the other hand, vulcanization of the raw rubber strip 5 to a highly elastic rubber takes place at this temperature. Simultaneously

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the raw rubber vulcanizes through the intermediary role of the hard intermediary layer 4 absolutely firmly on the glass surface, and finally the pressed together connect Ends of the raw rubber strip 5 »so that a circumferential one-piece tight edging is created. After the end of the heat overpressure cycle, how it was used to produce the actual If laminated glass is required, the vulcanization process for the production of the rubber surround is also completed.

The glass pane 8 shown in FIG. 2 is a monolithic one Pane of glass. In turn, an adhesion promoter layer 9 is applied to the edge and edge area. It will However, care must be taken that the adhesive layer is only applied to the outermost edge area of the glass surfaces, on a width B which is significantly less than the part covered by the rubber surround 1o. The one from the Adhesion promoter layer covered strips can for example have a width B of 4 to 8 mm, while the height K of Rubber edging can be 1o to 2o mm. After pressing the raw rubber strip 1o, the unit is used heated by pressure to the vulcanization temperature. The rubber bonds with the glass through the VuI-kansation process only in the area of the adhesion promoter layer 9 outside the adhesion promoter layer is the adhesion of the Rubber on the glass so small that the rubber strip without difficulty can be peeled off the glass. After inserting a pane of glass produced in this way in the frame 11, 12 of the Window opening, the rubber border 1o along the inner edge of the frame 11, 12 is cut with a sharp knife (Cutting line 13) and the severed strip 14 peeled off the glass surface. This results in a neat and smooth border of the rubber edging, like it is illustrated by reference number 15.

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Claims (9)

- '· "VE 215 Claims Method for the permanent fastening of bezels natural or synthetic rubber-like materials on glass panes, in which the permanent connection takes place during a heat treatment, thereby characterized in that strips of non-crosslinked rubber, so-called raw rubber or raw rubber, with the interposition of adhesion promoters around the edge areas to be bordered, and in the course vulcanization at the same time as the heat treatment the raw rubber or raw rubber strips on the glass surface, the vulcanization of the raw rubber or raw rubber, as well as the tight connection between the butting seams of the rubber or rubber strips takes place. 2. The method according to claim 1, characterized in that when applying bezels to multilayer glasses the vulcanization takes place in the course of the same heat treatment that is used for the connection of the individual layers between each other is required. 3. Method according to claim 1 or 2, characterized in that that the vulcanization of the mounts at a Temperature between 115 and 150 ° C and an overpressure from 2 to 10 atmospheres in a pressure autoclave. 4-, method according to one or more of claims 1 to 3, characterized in that as an adhesion promoter between the surround and the glass during vulcanization reaction primers known per se can be used. _ 8 409808/0 991 - ⁸ - ¥ E 215 5. The method according to one or more of claims 1 to 4-, characterized in that raw rubber strips of a greater width are used for the border than they are necessary for the tight installation of the panes in the frame of the window, which is later about the frame parts of the protruding into the interior of the window area Edging to be removed. 6. The method according to claim 5, characterized in that the adhesion promoter only on the edges and on the edges adjacent edge areas of the glass surfaces are applied over a width of a few millimeters, so that there is an indissoluble attachment between the edging and glass is limited to this edge area. 7 · The method according to one or more of claims 1 to 6, characterized in that when applying a border the cut edges of the glass panes on a laminated glass pane be kept free of adhesion promoters. 8. The method according to one or more of claims 1 to 7 * characterized in that for the formation of certain profiles of the enclosure on the laid around the glass edges Raw rubber strips corresponding shaping means during the vulcanization process come into play. . 9. End of the process according to one or more of the claims 1 to 8 Application of an edging to laminated glass panes with the thermoplastic intermediate layer inside arranged, the electrical heating of the glass serving resistance wires. A09808 / 0991