Rounding off our success: bent glass
The best connection between two points is sometimes a curve, i.e., a precisely bent pane of glass from sedak. We also produce glass, max. size 3.2m x 16m (10ft 6in x 52ft 5.9in), using the hot or cold bending method depending on requirements.
sedak has perfected tried-and-true methods of producing bent glass based on hot bending in the tempering furnace and cold bending over molds or during the laminating process.
Cold bending over rigid Framework.
This process of mold-based cold bending involves emplacement of a shear-flexible PVB interlayer that bonds the panes of glass together. Laminating in a bent state helps support the curved shape. However, supporting the pane's shape in a manner that permanently maintains the curved geometry is still required.
Cold bending during lamination.
This process of cold bending involves bending the individual panes of a glass laminate prior to laminating and subsequently laminating them with the new curved geometry. The finished laminated pane retains its bent shape after autoclaving without the need for a supporting framework to help the glass retain its shape. The unique advantage of cold bending of laminated glass is primarily its better optical quality due to fewer distortions and reflections. The minimum cold-bending radius is about 1500 times the thickness of the glass (e.g., 10mm: bending radius 16m; 3/8in―52ft 5.9in). Please contact our sales department for an analysis of your project; tighter radii might be possible.
Hot bending in the tempering furnace.
Hot bending plus sedak expertise makes even extreme glass shapes possible. For example, cylindrical panes up to 5m (16ft) long or bending angles of up to 90° are feasible.
|min. size||400mm x 600mm||16in x 24in|
|max. size||3200mm x 5000mm||126in x 196in|
|heat-treated||6mm - 19mm; max. bending angle 90°||1/4in - 3/4in; max. bending angle 90°|
|min. bending angle||2000mm (6mm + 12mm)||79in (1/4in + 1/2in)|
|1500mm (8mm + 10mm)||59in (5/16in - 3/8in)|
|2500mm (15mm)||98in (5/8in)|
|3000mm (19mm)||118in (3/4in)|
|min. cold-bending radius||1500 x thickness|
|6mm/ 1/4in||9m radius||354in radius|
|8mm/ 5/16in||12m radius||472in radius|
|10mm/ 3/8in||15m radius||590in radius|