There are many different factors to consider when it comes to choosing the right Keder: application, strength, durability, as well as available attachment methods.
Style, weave and thread weight are all factors to be considered when selecting the Keder that is right for your project.
Style – Keder can be largely separated into three main styles based on their attachment method: sewing, single-flag weldable, and double-flag weldable.
Sewing Keder – Sewing flag is the simplest of the three to attach. The flag is is welded shut, which makes it easy to sew to a fabric panel. This is often a great choice for signs and banners, however it can also for larger applications such as awnings and canopies.
Single Flag Keder – Single flag is designed to be attached by any welding method, including hot air welding, wedge welding, and radiofrequency welding (RF welding for short). RF welding creates a stronger bond and improves water tightness and UV resistance. Single flag is not appropriate for larger panels with high tensile loads because it is only welded on one side, that weld becomes a single point of failure. This is why single flag often uses wider 20mm welds, and why it’s highly recommended to use RF welded single flag Keder. All of the Keder distributed by our company is RF welded.
Double Flag Keder – Double-flag is the strongest and most durable, but can only be welded properly using a radio-frequency (RF) welder, which can be cost-prohibitive for smaller companies. The weld is no longer a point of failure because both sides of the flag are welded to the panel, making the strength of the fabric itself the only limitation.
Weave Styles – The weave style refers to the way the Keder Fabric is woven. There are two common weaves: plain weave and the panama style weave.
Plain Weave – Plain weave is the most basic form of weaving. Each weft yarn crosses the fill yarns up and under. The next weft yarn goes over the fill yarn that the previous weft yarn went under and so on.
Panama Weave – Panama weave is a variation, whereby 2 yarns next to each other go up and under, as well in the weft as the fill direction. The Panama weave allows a greater strength of the fabric with the same yarn size because more yarn can be woven per inch.
Thread Weight – There are different strengths when it comes to the thread, or yarn, that makes up the fabric. Fabric strength is measured using either the denier or the Dtex scale. Keder with thicker yarn tends to be stronger, more durable, and to slide better, however, it also usually costs more. Lightweight Manufacturing offers three different thread weights: 2000 Denier, 1500 Denier, and 1000 Denier.
Our team of experts is always happy to review which style is the best for your project. They will help you find the Keder that balances price, quality, durability, and look that will best fit your project.