Master Corner sealing profile with patented technology
Reduced performance in window corners is a thing of the past! Thanks to the patented-pending Master Corner technology. The closing characteristics, which are the same all around the circumference, with optimal sealing function and the neat appearance of Master Corner are now setting new standards, states Jürgen Daub. His responsibilities include Research & Development at Deventer.
Manufacturers of PVC and aluminium windows are well aware of the problems that can occur when processing sealing profiles. The properties of even the very best gaskets deteriorate if they roll up in the corner. If extrusion-joined sealing profiles react to the welding temperature in a different way to the window profile, this produces “weld beads” in the corners. They act like spacers. At the same time, hardened profiles do not seal as tightly, because they are more difficult to press onto the window profile. This often results in complaints from end users.
We’ve (still) got our work cut out for us
Daub explains that all of this is common knowledge in the industry and many system manufacturers have therefore tried out different approaches in their attempts to improve corner formation. However, most sealing profiles still have different, usually poorer, performance characteristics in the four corners of a window or balcony door than in the rest of the frame. “This may be caused by a welding process or be related to the bending behaviour of a sealing profile and its geometry,” explains Daub.
Comfort and sealing redefined
Daub is confident that “window manufacturers who prioritise sustainability and operating convenience rate TPE sealing profiles highly and draw these in themselves.” He goes on to explain that “if these manufacturers choose the patented-pending Master Corner version of a profile in future, they are guaranteed to achieve an unprecedented level of comfort and sealing.” PVC and aluminium window manufacturers alike could benefit from this innovation.
The devil is in the details
The special features of a Master Corner profile geometry are striking: a hard profile leg at an angle prevents the sealing profile from rolling up in the corner. The profile leg prevents the outer edges in the bend from turning towards the centre of the profile. A combination of rigid and flexible TPE also minimises rolling up on the inside.
Additionally, the profile foot has a slideway coating. This makes it easy to insert, even into aluminium profiles, without any aids. Other advantages when processing are obvious: “Master Corner is simply guided around the corner and doesn’t require any special machining steps. No cutting, no welding,” explains Daub. “This saves time and therefore costs, and also prevents the gasket from hardening in the corner under the effect of heat.”
Preventing premature wear
Daub admits that Deventer’s dedication to developing Master Corner is due in no small part to the fact that the company is part of Roto Window and Door Technology:
“ The gasket’s perfect corner formation reduces the load on the window hardware and extends its service life.”
After all, premature wear can occur, especially on the espagnolette, if users have to exert force and pressure on the handle to close the window. “A high operating force is always anindication of a high load on hardware component,” underlines Daub, “and – provided that the hardware is adjusted correctly – this evidently also means that the sealing profile has suboptimal properties.”
Compact and flexible
Daub once again summarises the properties of the innovation: the Master Corner sealing profile is as compact as it is flexible. This ensures that the outer radius of the applied sealing profile is much smaller in the corner than with most other gaskets. At the same time, the combination of materials reduces the risk of the gasket having no or insufficient contact in the area of the corner and overlap. “Thanks to the material and profile geometry, a window with a Master Corner gasket has almost the same performance values in the corner as at any other point on the frame.”
Performance that doesn’t cost extra
An important question to end with: is the added value offered by the geometry and properties also reflected in the price of a Master Corner sealing profile? “No, users don’t have to pay extra to benefit from this smart design. We are working on offering a Master Corner version of as many customer-specific sealing profiles as possible in future.” Deventer will now be able to produce a compatible TPE gasket with the aforementioned features and strengths in terms of installation geometry and installation distance between sash and frame for any PVC and aluminium window manufacturer.
Deventer will therefore boast a unique selling proposition, in addition to the familiar strengths of TPE gaskets, such as durability, recyclability, top-rate retraction and sealing properties. A Master Corner sealing profile can also be produced in light colours on request.
Deventer Master Corner
- Compact TPE sealing profile with patented profile geometry
- Gasket does not roll up in the frame corner
- Securely positioned, even in the frame corner
- Same sealing effect at any pointon the window
- Simple and rapid installation without tools or aids
- For effortless operating convenience
- For tightly sealed window systems
- Also available in light colours
This article was published in Roto Inside 51.