Product Overview
This customizable roll coater is a continuous coating system that applies precise layers of paints, adhesives, functional coatings, or hot melts onto flat or flexible substrates. Available in industrial wide-format, laboratory roll-to-roll, and hot melt configurations.
The system is fully customizable in coating width, roller configuration (2-roll / 3-roll / reverse roll), drying modules, and automation level. The roller coating method is suitable for large-area sheet and strip coating, offering high efficiency and ease of achieving continuous production.
Working principle: The coating is picked up by the applicator roll from the pan and transferred to the substrate. In reverse roll coating, the applicator roll rotates opposite to the substrate direction, providing better shear control and enabling ultra-thin, uniform coatings (down to 1-2 µm). This method is widely used for architectural paint on coil metal, thermal coatings, adhesives, and specialty optical applications.
Customization Options
This roll coater is highly customizable to meet your specific production requirements:
- Roller configuration: Select from 2-roll direct, 3-roll inline, 3-roll V-type, or reverse roll configuration
- Coating width: Customizable from laboratory scale (100-300 mm) to industrial scale (up to 3,400+ mm)
- Coating method: Forward roll, reverse roll, differential roll, gravure roll, slot die
- Roller material & surface: Chrome-plated, rubber-covered (EPDM, polyurethane), ceramic-coated, or grooved rollers
- Roller gap & load control: Manual micrometer or servo motor automatic adjustment
- Speed ratio: Programmable applicator/pick-up roll speed ratios - customizable per process requirements
- Drying/curing system: Hot air, IR, UV, NIR - single or combined modules
- Substrate pretreatment: Corona treatment, web cleaning, plasma treatment
- Feeding method: Pan feed (for low viscosity) or nip feed (for high viscosity)
- Automation level: Manual, semi-automatic, or fully automatic with recipe management
- Clean-in-place (CIP): Remote solvent/water flushing system for roll and pan cleaning
- Roller quick-change system: Hinged bearings for simple cleaning and roller exchange
Frequently Asked Questions
Q1: What is the difference between a 2-roll and a 3-roll coater?
A: A 2-roll coater transfers coating directly from the applicator roll to the substrate - suitable for thicker coatings. A 3-roll coater adds a metering/doctor roll between the pick-up roll and applicator roll, providing more precise coating thickness control. The configuration is customizable based on your application requirements.
Q2: What is reverse roll coating and when should I use it?
A: Reverse roll coating occurs when the applicator roll rotates opposite to the substrate direction, providing better shear control and enabling ultra-thin, uniform coatings (down to 1-2 µm). It is ideal for precision applications like architectural coil coatings, thermal coatings, and optical films.
