Hemming is an important step in finishing frontlit flex banners. It involves reinforcing the edges of the banner to prevent fraying and provide a clean, professional appearance. There are several hemming techniques commonly used for frontlit flex banners:
Heat Welding (Hot Air Welding): Heat welding is a popular technique that uses hot air to melt the banner material along the edges. The melted material fuses together, creating a strong and durable hem. Heat welding produces a clean edge and is often considered one of the most effective hemming methods.
Sewing: Sewing involves stitching along the edges of the banner to create a hem. While sewing is a traditional method, it may not be as durable as heat welding, especially in outdoor environments where weather conditions can impact the thread's integrity.
Adhesive Tapes: Specialized adhesive tapes designed for banner hemming are applied to the edges. These tapes provide a secure bond, but their durability might vary based on the quality of the tape and the outdoor conditions.
Folded Hem: In this technique, the banner material is folded over and then secured using heat welding, sewing, or adhesive tapes. This method provides a double-layered edge for added strength.
Banner Hemming Machines: Some equipment is specifically designed for hemming banners. These machines can apply heat, pressure, and sometimes adhesive to create a strong and uniform hem along the edges.
Banner Hemming Tape: Similar to adhesive tapes, there are specific hemming tapes designed for banner materials. These tapes can be applied with a heat press, creating a bonded hem.