Narrow-Web Flexo Presses
Narrow-web flexo presses are defined by a web width under 20 inches (508mm). This designation serves as a useful benchmark, although most machines operate at 16 inches (406mm) or less, with many at 10 inches (254mm) or smaller. Evolving market demands and the pursuit of higher productivity are shifting this standard, leading to wider press adoption. Web widths of 10 inches (254mm) and 13 inches (330mm) have largely replaced older 6-inch (152mm) to 8-inch (203mm) standards, while 18-inch (457mm) to 20-inch (508mm) presses are increasingly common.
A rotary process, narrow-web flexography integrates multiple in-line converting functions. A critical feature for its target markets is variable print, or repeat length, capability. While other printing processes may require intermittent web motion to achieve this, flexography's efficient ink system, low-cost plate cylinders, and cost-effective plate processing for various sizes eliminate the need for platen-type systems. Plate cylinders are changed with ease and economy on narrow-web presses, enabling repeat length alteration while maintaining continuous rotary printing. Typical presses offer a print repeat range from approximately 4 inches (101mm) to 24 inches (609mm) in 0.125-inch (3mm) increments.
It is uncommon for a narrow-web flexo press to be used solely for printing. Most applications incorporate in-line converting operations like die-cutting, slitting, or laminating. Performing these multiple functions in-line at high speeds delivers significant production efficiencies and cost savings. These converting tasks are typically executed by rotary means, though platen (flatbed) die-cutting is also an option, and foil for stamping can be fed intermittently.
Increased automation and connectivity are streamlining workflows, while a focus on sustainability drives the adoption of more environmentally conscious materials and processes. These advancements ensure the technology remains a vital and efficient solution for modern label and packaging production.
A continued emphasis on sustainability promotes the use of water-based inks and recyclable substrates, aligning with broader environmental goals without compromising on print quality or durability.