Adhesive Coating Technology Center

Micro-Control Adhesive Coating Technology

The WebFlight Adhesive Coating Process Explained

WebFlight adhesive coating technology is a contactless method of applying adhesive coating solutions to web materials by modifying the micro-environment in which the adhesive coating solution and web meet.

WebFlight adhesive coating does not employ rollers, knives, blades, or other contact devices to apply or level coating solutions across the web. Instead, WebFlight adhesive coating uses the following methods to optimize the adhesive coating process:

Micro-Environment Control

By precisely matching process variables, such as flow rate, line speed, and vacuum pressure with adhesive coating fluid and web substrate properties such as viscosity, surface tension, and adhesiveness, WebFlight adhesive coating systems enable maximum adhesive coating productivity.

Fluid Isolation

By isolating the adhesive coating fluid from the surrounding atmosphere, rheological characteristics remain constant throughout the adhesive coating run, which means fewer adjustments of all other process variables. In addition, emissions of VOC's are minimized and easily vented.

Atmospheric Pressure Control

Reduction of the atmospheric pressure in the vacuumchamber creates a low-pressure fluid eddy on the upstream side of the injection point, which serves two purposes. First, it primes the web with adhesive coating fluid ahead of the die slot, effectively enlarging the injection stream, thereby facilitating an integrated transition between adhesive and cohesive bonding. Second, it acts as an air dam, diverting residual boundary layer air away from the injection point and into the vacuum chamber.

Adhesive Coating Process Optimization

WebFlight adhesive coating technology's precision controls facilitate extreme uniformity of fluid deposition, higher line speeds, less down time, less solvent usage and greater throughput for virtually any combination of web materials and coating fluids.