WO2007068353A2

WO2007068353A2 - Method for the production of a permanently glued laminated sheet comprising at least one transparent sheet

Info

Publication number: WO2007068353A2
Application number: PCT/EP2006/011454
Authority: WO
Inventors: Friedrich Schock
Original assignee: Friedrich Schock
Priority date: 2005-12-12
Filing date: 2006-11-29
Publication date: 2007-06-21
Also published as: DE102005059674B3; WO2007068353A3

Abstract

Disclosed is a method for producing a permanently glued laminated sheet comprising two superimposed sheets and an intermediate fabric layer. According to said method, the lateral edge areas of the fabric layer are first attached and the lateral outer edges of the sheets are pressure-tightly sealed, whereupon reaction resin is introduced in a feeding duct that is mounted upstream and communicates with the intermediate space, and pressure is subsequently applied to the external side of one sheet, starting from the side of the laminated panel facing the feeding duct and progressively towards the discharge side.

Description

Process for producing a firmly bonded plate composite with at least one transparent plate

The invention relates to a method for producing a firmly bonded plate composite, consisting of two superimposed plates, of which at least one plate is made transparent, with an arranged between the plates and impregnated with reactive resin fabric layer.

Known are so-called laminated safety glass panes, which are used for example in the automotive industry as windscreens and consist of two parallel, superimposed individual glass panes with an intermediate thermoplastic film. These laminated safety glass panes are bonded together in autoclaves under pressure and heat with preliminary air evacuation, wherein the film is designed as a melt resin film, which leads to the gluing of the glass panes. It is advantageous in the case of such safety glass panes that they do break under the action of force, but do not break up into individual pieces due to the intervening foil.

A method for producing a laminated glass pane is also described in DE 27 28 762 A1. In this method is in the space between two individual slices introduced hardening plastic, which is filled in a corner of the disc composite or possibly also at several filling points, wherein the air is discharged at an opposite corner or at several outlets.

However, these methods for connecting two individual glass panes can not be applied to the case that a dense fabric layer is to be used as the intermediate layer, whereby desired optical effects and aesthetic impressions can be achieved with high security at the same time. In fabric layers, it is necessary to introduce a liquid resin in the space between the glass panes, with a particular difficulty is the air bubble-free impregnation of the porous fabric layer. In addition, care must be taken that the fabric layer is not compressed when introducing the reaction resin.

The invention has for its object to provide a plate assembly with two superimposed plates, at least one of which is designed as a transparent plate, and an intermediate fabric layer, the plates should be firmly connected to each other and the fabric layer evenly and without air trapping between the plates should be embedded.

This problem is solved according to the invention with the features of claim 1. The dependent claims indicate expedient developments.

In the novel method for producing a firmly bonded plate composite, first in a first method step, the fabric layer is placed on the lower plate and then the upper plate is placed on the fabric layer, so that a plate assembly is formed with two plates and a gap with therein received tissue layer. In the next method step, at least two lateral, opposite edge regions of the fabric layer are fixed between the superimposed plates and the plate interspace is pressure-tightly sealed at the associated lateral outer edges. Subsequently, reaction resin in an upstream and pressure-tight closed insertion channel, which extends in the region of an end face of the plate assembly expedient over the entire width of the plates introduced; the introduction channel is with the

Plate gap, in which the fabric layer is received, connected, so that the reaction resin from the introduction channel can flow into the space between the plates. The hydraulic pressure generated during the injection of the liquid reaction resin slightly pushes the plate apart, thereby allowing injection of the entire amount of the reaction resin in the region of the face of the plate.

In the subsequent process step, pressure is applied to the outside of a plate, beginning at the end face of the plate composite facing the introduction channel with the reaction resin and progressing in the direction of the opposite outlet end face. The end face which is adjacent to the introduction channel is either pressure-tightly sealed by means of a suitable medium, like the lateral edge regions, or covered by a wall of the introduction channel. At the outlet end there is an open passage between the superimposed plates, so that this side is depressurized at the end edge of the plates and the reaction resin extending to this point can flow away via the passage. Thereafter, the reaction resin can harden. This process ensures even spreading and penetration of the reaction resin while avoiding trapped air in the gap and in the fabric layer. The introduction channel is first completely filled with reaction resin, which is expediently injected under pressure into the introduction channel. Since the introduction channel is sealed pressure-tight and connected only to the space between the plates, the reaction resin spreads from the introduction channel into the space with the fabric layer therein. The direction of propagation is uniquely determined, since the lateral outer edges of the plates are sealed pressure-tight, for example by means of a sealing resin, and the plate gap is open only at the outlet end face. In order to prevent the fabric layer from being compressed by the incoming reaction resin or by the externally applied and advancing pressure, the fabric layer is fixed to the panels at its lateral edge regions. The fixing of the fabric layer is expediently carried out in a joint step with the pressure-tight sealing of the gap at the lateral outer edges of the plates by the lateral, reaching to the outer edge of the plates edge regions of the fabric layer are fixed by means of the sealing resin, which at the same time for pressure-tight sealing to the Outside edges is used.

The applied to the outside of at least one plate pressure perpendicular to the plate surface, which is applied for example by means of a roller roller, presses the reaction resin from the introduction channel or from the insertion directly adjacent, slightly bulged edge regions of the plates in the direction of the opposite outlet end face is depressurized due to the open passage between the plates. The towards exit Front-side pressure supports the uniform spreading of the reaction resin throughout the space between the plates. In addition, it is ensured that the air in the space and in the fibers of the fabric layer is displaced and escapes through the open passage at the outlet end face. As a result, the gap and the fabric layer including all the fibers and pores in the fabric layer are completely filled with the reaction resin excluding air bubbles. When using a clear reaction resin thus a plate laminate is achieved, in which the fabric layer is visible through the transparent plate through which special aesthetic impressions and optical effects can be achieved. At the same time, the plates are permanently connected to each other and the intermediate fabric layer is a reinforcement which considerably improves the stability and safety, as in the case of a laminated safety glass pane.

As reaction resins completely clear reaction resins are suitably used, for example, low-monomer, possibly monomer-free epoxy and polyurethane resins or low-monomer or liquid-free liquid reaction resins and shrink resins (acrylic or polyester resins), which do not solve the inks of the fabric layer and also cure largely shrinkage-free. Polyaddition resins such as epoxy resin can be used especially in silicate glass, whereas acrylic resins (PMMA) can be used especially in organic glass. To improve the flowability, the viscosity of the reaction resin can be reduced by solvent and / or heating, which in particular the propagation into the space is improved with the fabric layer therein. Since no air bubbles are trapped in the reaction resin due to the pressure applied from the outside, a perfectly clear and transparent connecting layer in the plate gap achieved, which does not affect the colors and patterns or other optical effects, for example holography of the introduced for decoration fabric layer in any way. About the magnifying effect of the reaction resin can even be an effect enhancement caused.

The curing of the resin is expediently carried out under heat, optionally additionally or alternatively a UV curing comes into consideration. In addition, it is possible that the resin cures under normal conditions, ie without heat, but optionally under UV irradiation.

The method is suitable for connecting two plates, of which at least one is designed as an at least partially transparent or translucent plate. When using two transparent panels, a light transmission through the entire panel composite is achieved, whereby the aesthetic impressions are improved. Suitable material for the plates is both inorganic silicate glass and organic glass into consideration, for example, acrylic, PET, PS, PVC or the like. Both the use of rigid plates and of flexible plates, for example of thin glass or of films, in particular of transparent films, is possible. One of the plates may be made of non-transparent and / or other material than glass, for example of wood or metal.

As a fabric layer natural and synthetic materials can be used, but beyond paper, nonwovens or films such as perforated or knitted fabrics, such as metal knit. However, the fabric layer should be provided for improved propagation of the reaction resin with passages that extend advantageously in the propagation direction of the reaction resin, ie in the plane of the fabric layer. Advantageously, in the region of the outlet end face of the plate composite, a pressure-free collecting channel is provided for excess reaction resin emerging via the outlet end face. In this collection channel, the exiting reaction resin is added, while ensuring that after releasing the pressure on the outside of a plate and thereby possibly caused slight increase of the previously pressurized plate, a certain amount of reaction resin from the collection channel back into the gap can flow back between the plates without drawing in air. The negative pressure of the slightly raised, upper plate sucks the reaction resin from the collection channel back into the gap. Since the outlet end face is completely covered with reaction resin from the collecting channel, it is ensured even with a backflow of the resin into the space between the plates that no inclusion of air bubbles takes place.

The introduction channel at the entrance end face of the plate assembly can be formed by a peripheral portion of the lower and upper plate, wherein in this peripheral portion no intermediate fabric layer is introduced, so that the injected reaction resin can propagate unhindered in the gap. The introduction channel expediently extends over the entire width of the plate composite, so that the reaction resin initially spreads into the introduction channel in the injection channel and then flows into the intermediate space of the fabric layer, even before the application of pressure to the outside of the plate. It is then expedient to apply pressure to the outside of the plate via a roller roller. beginning in the area of the introduction channel and progressing towards the outlet end face.

Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:

1 is a plan view of a plate composite, consisting of two superimposed glass plates and an intermediate fabric layer,

2 shows a section along section line II-II of Fig. 1,

3 shows a section along section line III-III of Fig. 1st

In the figures, a plate composite or laminate 1 is shown, which consists of two superimposed glass plates 2 and 3, between which a gap 4 is formed with a fabric layer 5 received therein. The fabric layer 5 is made of synthetic or natural material, such as silk, in addition, however, also come into consideration other materials that allow spreading of liquid resins in the fabric plane, such as paper, nonwoven or perforated films of different materials, polyester, wool, cotton, Fiberglass, Lurex and more. The thickness of the fabric layer 5 is, for example, 0.3 mm, the height of the intermediate space 4 is typically between 0.1 and 0.5 mm, depending on the thickness of the fabric layer. The thickness of the glass plates is for example 3 mm. As a material for the glass plates, both organic silicate glass and organic glass can be used. The glass plates can be clear or colored. The connection between the glass plates 2 and 3 and the intermediate fabric layer 5 is carried out using a liquid reaction resin, which is designed for example as monomer poor, possibly even monomer-free polyaddition resin or acrylic resin, which hardens substantially without shrinkage and the printing inks in the fabric layer does not dissolve.

The glass plates 2 and 3 are rectangular in plan view, wherein the lower glass plate 2 is both slightly wider and longer than the upper glass plate 3. As a result, in each case a shoulder 6 between the upper side at the lateral edge of the lower glass plate 2 and the lateral outer edge 7 of the upper glass plate 3 is formed in both side regions. In addition, in the longitudinal direction following the exit end face 11 of the upper glass plate 3, a protrusion formed by the lower glass plate 2, which is used as a collecting channel 10. This collecting channel 10 is bordered by delimiting walls 12 applied to the top side of the plate 2; the collecting channel 10 is open at the top. The intermediate space 4 between the two glass plates 2 and 3 opens into the collecting channel 10, for which a free passage in the region of the outlet end face 11 into the collecting channel 10 is formed.

In the region of the outlet end face opposite end face of the plate assembly 1, an introduction channel 9 is provided, which is formed by the fact that in the region of this introduction channel 9, the two glass plates 2 and 3 are superimposed with the intermediate space 4, but the fabric layer 5 is not extends into this insertion channel 9 inside. The fabric layer 5 extends only from the dashed lines indicated end edge 13 (Fig. 1), which is at a distance from the frontal outer edge 14 of the two glass plates, to the opposite outlet end face 11 of Accordingly, the introduction channel 9 between the front-side outer edge 14 and the end edge 13 of the fabric layer 5 is formed. The introduction channel 9 extends as well as the collecting channel 10 over the entire width of the upper glass plate 3 and thus also the fabric layer fifth

The plate composite 1 is sealed pressure-tight on three sides by means of a sealing resin 8. The sealing resin 8 extends in the region of the lateral outer edges 7 and the front edge 14 on the introduction channel 9. The opposite outlet end face 11 is, however, open so that the gap 4 can communicate with the collecting channel 10 via this end face.

The method for assembling the panel composite 1 works as follows:

First, the fabric layer 5 is placed on the lower glass plate 2, then the upper, slightly narrower glass plate 3 is placed. Suitably, the fabric layer 5 is selected to be wider than the upper glass plate 3, so that on the sides left and right of the edge region of the fabric layer on the shoulder 6 of the lower glass plate 2 protrudes. This protruding edge region can then be separated by means of a knife exactly at the outer edge 7 of the upper glass plate 3.

The plate composite 1 is sealed pressure-tight on three sides by means of the sealing resin 8, only the opposite outlet end face 11 remains open.

Via a sprue opening 15 which is introduced into the upper glass plate 3 at the level of the introduction channel 9, liquid and preheated reaction resin is introduced into the introduction channel 9 injected, in which the reaction resin completely spreads. Since the introduction channel 9 extends across the width of the plate assembly and is in communication with the gap 4, the reaction resin spreads evenly into the gap 4 with the fabric layer 5 from. However, the pressure under which the reaction resin is injected in the direction of arrow 16 (FIG. 2) via the gate 15 and the forces of diffusion in the fabric layer 5 are insufficient to permit propagation throughout the gap. Therefore, after a sufficient amount of reaction resin is injected and the gate 15 is pressure-sealed as shown in Fig. 2, pressure is applied to the outside of the upper glass plate 3 by means of a roller roller 17, vertical to the plate surface. The pressure over the roller roller 17 is first applied to the outside of the glass plate 3 at the level of the introduction channel 9. Starting from the introduction channel 9, the roller 17 advances in the direction of arrow 18 - or the plate assembly 1 is pulled in the opposite direction under the roller - until the entire top of the glass plate 3 was acted upon by the pressure of the roller 17 until reaching the exit end face 11 , The pressure across the roller 17 causes the two glass plates to approach each other and the space 4 is slightly compressed, whereby on the one hand air bubbles pushed out of the reaction resin and on the other hand, the reaction resin from the introduction channel 9, starting in the direction of the exit end face 11 is pressed. Since there is a passage to the collecting channel 10 at the outlet end face 11 and the collecting channel 10 is pressure-free, excess reaction resin can flow into the collecting channel 10.

After the pressure of the roller 17 has been released, the glass plates may slightly diverge, whereby a negative pressure is created, which has the consequence that located in the collecting channel 10 reaction resin back into the gap. 4 is sucked in. As long as the level of the reaction resin in the collecting channel 10 exceeds the free passage to the intermediate space 4, there is no risk that air bubbles are sucked into the intermediate space.

After the reaction resin has been distributed in the entire space 4 by applying the pressure, the plate composite 1 can be placed in a heating furnace where the reaction resin cures. After curing, the panel composite 1 can be cut, wherein in particular the edge areas with the introduction channel 9, the collecting channel 10 and the side area with the sealing resin 8 can be removed. The remaining plate composite is permanently laminated together, and due to the clarity of the reaction resin, the structure and color of the tissue layer 5 located in the intermediate space 4 can be seen from both sides of the plate.

Claims

claims

1. A process for producing a firmly bonded plate composite consisting of two superimposed plates (2, 3), of which at least one plate (2, 3) is designed as a transparent plate, and a lying between the plates (2, 3) fabric layer (5), wherein the space between the plates (2, 3) and the fabric layer (5) are filled by a reaction resin, comprising the following steps: a) placing the fabric layer (5) on the lower plate (2) and placing the Upper plate (3) on the fabric layer (5), b) fixing at least two lateral edge regions of the fabric layer (5) between the superimposed plates

(2, 3) and pressure-tight sealing of the intermediate space (4) at the associated lateral outer edges (7) of the plates (2, 3), c) injecting the reaction resin in an upstream and pressure-tight closed insertion channel (9) located in the region of Front side of the plate assembly (1) across the width of the plates (2, 3) and with the tissue layer (5) receiving the intermediate space (4) between the plates (2, 3) communicates, d) applying pressure to the outside of a plate (3), wherein the pressure is first applied to the introduction channel (9) facing the front side of the plate assembly (1) and then in the direction of opposite outlet end face (11) on which the superimposed plates (2, 3) at least partially have an open passage for exiting reaction resin.

2. The method according to claim 1, characterized in that a polyaddition resin is used as the reaction resin, in particular a monomer poor epoxy resin.

3. The method according to claim 1 or 2, characterized in that an acrylic resin or a polyester resin is used as the reaction resin, in particular a monomer poor acrylic resin.

4. The method according to any one of claims 1 to 3, characterized in that a polyurethane resin is used as the reaction resin.

5. The method according to any one of claims 1 to 4, characterized in that the introduction channel (9) by a peripheral portion of the plate assembly (1) with lower and upper plate (2, 3) without intermediate fabric layer (5) is formed, wherein the Outer edge (14) of the introduction channel is sealed pressure-tight.

6. The method according to any one of claims 1 to 5, characterized in that at the outlet end face (11) of the plate assembly (1) a pressure-free collecting channel (10) for excess and on the outlet end face (11) exiting reaction resin is provided.

7. The method according to claim 6, characterized in that the collecting channel (10) extends over the entire width of the outlet end face (11).

8. The method according to claim 6 or 7, characterized in that the collecting channel (10) is formed by the fact that the lower plate (2) projects beyond the front edge of the upper plate (3) and the projecting portion of the lower plate (2) of boundary walls (12).

9. The method according to any one of claims 6 to 8, characterized in that after the curing of the reaction resin of the collecting channel (10) is separated.

10. The method according to any one of claims 1 to 9, characterized in that after the curing of the reaction resin of the introduction channel (9) is separated.

11. The method according to any one of claims 1 to 10, characterized in that after curing of the reaction resin, a lateral projecting shoulder (6) of the lower plate (2) is separated.

12. The method according to any one of claims 1 to 11, characterized in that subsequent to the application of the pressure on the outside of at least one plate (3), the reaction resin in the plate composite (1) cures under heat.

13. The method according to any one of claims 1 to 12, characterized in that the reaction resin is injected via a gate (15) in the introduction channel (9).

14. The method according to any one of claims 1 to 13, characterized in that the reaction resin is heated prior to introduction into the introduction channel (9).

15. The method according to any one of claims 1 to 14, characterized in that the pressure by means of a roller (17) on the outside of the plate (3) is applied.

16. The method according to any one of claims 1 to 15, characterized in that a fabric layer is used as a fabric layer (5).

17. The method according to any one of claims 1 to 16, characterized in that an inorganic silicate glass plate is used as the glass plate (2, 3).

18. The method according to any one of claims 1 to 17, characterized in that the glass plate (2, 3) consists of organic glass.

19. The method according to any one of claims 1 to 18, characterized in that for sealing the outer edges (7, 14) of the plate assembly (1), a sealing resin is used.