Is Roll Coating Equipment Suitable for All Coatings

2025.04.08

Author：roll coating equipment

Roll coating equipment is not suitable for all coatings. Its applicability mainly depends on the viscosity, characteristics and coating process requirements of the coating. The following is a specific analysis:

1. Applicable coating types

Medium and low viscosity coatings

Roll coating equipment has high requirements for coating viscosity and is usually suitable for coatings with a viscosity between 40-150 seconds (coating-4 cups). For example: water-based coatings, oil-based coatings, UV-curing coatings, etc.

Specific functional coatings

Water-based coatings: environmentally friendly and pollution-free, suitable for industries with high environmental protection requirements.

UV-curing coatings: fast drying speed, suitable for processes that require rapid curing.

Rust-proof paint, blending paint: suitable for anti-corrosion coating on metal surfaces.

2. Inapplicable coating types

High viscosity coatings

Excessive viscosity will make it difficult for the coating to adhere evenly to the roll, resulting in uneven coating or roll clogging. For example: some high-solids coatings or coatings with strong thixotropy.

Special effect coatings

Metallic paint, pearlescent paint: Roll coating may not achieve the ideal metallic texture or pearlescent effect.

Textured coatings: Special processes (such as spraying) are required to form texture effects.

Quick-drying coatings

Coatings that dry too quickly may cure prematurely during the rolling process, resulting in coating defects.

3. Factors affecting the applicability of coatings

Coating viscosity

Viscosity that is too high or too low will affect the coating effect, and the coating viscosity needs to be adjusted according to the equipment parameters.

Coating properties

The thixotropy, leveling, drying speed and other properties of the coating need to match the rolling process.

Coating thickness

Rolling equipment is usually suitable for thin or medium-thick coatings (such as 10-100μm), and it is difficult to achieve ultra-thick coatings.

4. Solutions

Adjust the coating formula

Adjust the viscosity of the coating by adding diluents or thickeners to adapt it to the rolling process.

Choose special rolling equipment

For example, UV curing roll coaters are suitable for UV coatings, and water-based roll coaters are suitable for water-based coatings.

Combine with other processes

For coatings that are not suitable for rolling, spraying, dipping and other processes can be used in combination.

Qingdao Chenan Machinery Co., Ltd. has the advantage of developing and producing rubber winding equipment, with higher technology than various equipment assembly manufacturers in the industry. For more information about roll coating equipment, please contact us.

Company: Qingdao Chenan Machinery Co., Ltd.

Address: Yanjialing Industrial Park, East Chengma Road, Tongji New Economic Zone, Jimo District, Qingdao City, Shandong Province

Email: qdcajx@gmail.com