Web gauging solutions

Importance of the topic

Online, non-contact gauging systems have become essential in continuous web processing to maintain tight tolerances on thickness and basis weight. These measurements directly impact product functionality, consistency and raw material economy across industries such as plastics extrusion, coating, nonwovens and battery separators.

Objectives and study overview

This white paper presents Thermo Scientific’s portfolio of measurement platforms, sensors, scanners and control systems designed to optimize process performance, ensure uniform product quality and deliver cost savings through reduced scrap and material usage.

Methodology and instrumentation used

• Gauging platforms: 21PlusHD for advanced process control and IPlus! as a cost-effective option.
• Sensors: Beta Plus (beta transmission), PROSIS (infrared thickness and moisture), ShadowMaster (direct optical thickness), X-Ray Master (x-ray weight/thickness).
• Controls: Automatic Profile Control (APC), Machine Direction (MD) control, Calender Control, Target Management and Adaptive Throughput Control.
• Scanners: Mark III, L400, L220, L220 Shadow, C-Frame and Box Beam designs for harsh environments.

Main results and discussion

Integration of high-resolution sensors with intelligent controls demonstrated improvements in cross-direction uniformity, faster line start-ups, enhanced reporting and SPC traceability. APC and MD control algorithms reduced thickness variation and raw material usage by up to 10 %, while calender control minimized roll profile defects.

Benefits and practical applications

Thermo Scientific systems enable manufacturers to:

• Produce consistent film thickness for extrusion and biax processes.
• Maintain accurate coat weights in adhesive, barrier and aseptic packaging.
• Control nonwoven basis weight and moisture for hygiene products.
• Ensure uniform vinyl calendered sheet and building materials.
• Map separator films and electrode coatings in lithium-ion battery production.

Future trends and possibilities

Advances in sensor miniaturization, machine-learning-driven control strategies and cloud-based analytics will further improve predictive maintenance, adaptive process optimization and support emerging materials such as ultra-thin multilayer films and advanced battery separators.

Conclusion

By combining robust hardware with sophisticated control algorithms and open communication standards, modern web gauging solutions deliver measurable gains in quality, yield and profitability. Adopting these technologies positions manufacturers to meet evolving market demands and sustainability goals.

References

• No external academic references were cited; based on Thermo Fisher Scientific application and product literature.