ADHESIVE JOINING AND REINFORCEMENT OF GLASS PACKETS IN SASH PROFILES

Abstract

A wing profile has a glass package including several glass plates, wherein the wing profile has a reinforcement element made of plastic, which substantially is mounted on the wing profile below the entire support surface of the glass package. Between the reinforcement element and the glass package, a cohesive connection is provided by a plurality of adhesive elements.

Claims

1. A sash profile having a glass packet comprising a plurality of glass plates, wherein the sash profile has a reinforcing element which is composed of polymer and is installed essentially under the entire contact area of the glass packet on the sash profile, where a substance-to-substance join between the reinforcing element and the glass packet is provided by means of at least two adhesive elements and the adhesive elements have an E modulus in accordance with ISO 37 (at 23° C. and 50% relative atmospheric humidity) of at least 100 N/mm.sup.2.

2. The sash profile as claimed in claim 1, wherein the reinforcing element is angled so that part of the reinforcing element is arranged on the face side of the glass packet and another part of the reinforcing element is arranged on the underside of the glass packet.

3. The sash profile as claimed in claim 1, wherein the reinforcing element is coated with an adhesion-promoting material on the side joined to the adhesive element.

4. The sash profile as claimed in claim 1, wherein it has an adhesive element which is arranged in the region of the edge of the rear side between the glass packet and the reinforcing element.

5. The sash profile as claimed in claim 1, wherein it has an adhesive element which is arranged in the region of the edge of the face side between the glass packet and the reinforcing element.

6. The sash profile as claimed in claim 1, wherein the reinforcing element comprises a thermoplastic polymer.

7. The sash profile as claimed in claim 6, wherein the reinforcing element additionally contains fibers.

8. The sash profile as claimed in claim 7, wherein the reinforcing element contains a proportion of from 10 to 60% by weight of fibers.

9. The sash profile as claimed in claim 6, wherein the thermoplastic polymer in the reinforcing element has an envelope which is made of a polymer which is different from the thermoplastic polymer.

10. The sash profile as claimed in claim 1, wherein the adhesive element is based on a free-radically curable two-component (meth)acrylate adhesive composition.

11. The sash profile as claimed in claim 1, wherein the adhesive element has an E modulus in accordance with ISO 37 (at 23° C. and 50% relative atmospheric humidity) of at least 160 N/mm.sup.2.

12. The sash profile as claimed in claim 1, wherein the glass packet has at least three glass layers.

13. The sash profile as claimed in claim 1, wherein the reinforcing element is joined directly via the adhesive elements to the glass packet and there is optionally a hollow space adjoining the reinforcing element in the direction of the glass packet.

14. A process for producing a sash profile, as claimed in claim 1, comprising the steps: provision of a hollow profile, installation of a reinforcing element on the hollow profile, installation of a plurality of adhesive elements on the reinforcing element, where the adhesive elements have an E modulus in accordance with ISO 37 (at 23° C. and 50% relatively atmospheric humidity) of at least 100 N/mm.sup.2, and contacting of the plurality of adhesive elements with a glass packet to form a substance-to-substance join between the reinforcing element and the glass packet via the adhesive element.

15. A method comprising applying a combination of adhesive elements and a reinforcing element for improving the flexural strength of a sash profile, wherein a glass packet is joined by substance-to-substance bonding via the adhesive elements to the reinforcing element arranged on the sash profile and the adhesive elements have an E modulus in accordance with ISO 37 (at 23° C. and 50% relative atmospheric humidity) of at least 100 N/mm.sup.2.

Description

EXAMPLES

[0043] The flexural stiffness of various glass sashes consisting of a PVC sash, a glass packet, a reinforcing element made of Ultradur and various adhesives was calculated by means of a finite element model (FEM). A structure having a typical silicone adhesive having an E modulus (in the cured state) of about 2 MPa was used as a basis for a reference sash. For sash profiles according to the invention, either a stiff adhesive having an E modulus (in the cured state) of about 100 MPa or an adhesive having an E modulus of 1000 MPa was used as basis. The adhesives should be installed on the glass packet as shown in FIG. 1.

[0044] Specifically, the calculations were based on the following structure: [0045] Dimensions of the glass sheets: 2.0×1.0 m [0046] Thickness of the two outer glass sheets: each 4 mm [0047] Distances of the triple glass packet: 4 mm glass+16 mm air+4 mm glass+16 mm air+4 mm glass [0048] Thickness of the reinforcing element: 3 mm, E modulus 14 000 MPa [0049] Thickness of the adhesive: 3 mm, width 4 mm

[0050] The sag of the glass sashes in the middle of the long and short sides of the glass sash on loading with a force of in each case 250 N during storage of the glass sash was calculated by means of a simplified finite element model. The results of these calculations are given in table 1 below:

TABLE-US-00001 TABLE 1 E modulus of Ratio to adhesive adhesive [MPa] Sag [mm] E = 2 MPa Flexure over the long side 2 12.5 100 2.1 6 1000 0.84 15 Flexure over the short side 2 2.95 100 0.92 3 1000 0.36 8

[0051] The calculations show that, with the same structure of the composite, a significant reduction in the sag at the force introduction point is established when the E modulus of the adhesive is increased.