Overview
LENETA WC-4 Mayer Rods, also known as Wire-wound drawdown bar coating applicator or Mayer Rod, is a laboratory tool for preparing coatings into films of film thickness. This model has a wire diameter of 0.10mm (4mil) for preparing films of approximately 8µm (0.3 mil) thickness, and a Spreader width of 254mm (10 inches) for most standard size baseplates.
Features
Wide range of wire diameter: from 0.064mm to 1.9mm (2.5 to 75mils) to provide a variety of models to choose from, corresponding to different film Film thickness requirements.
2. Accurate film Film thickness: The preparatory wet film thickness ranges from 4.5 µm to 150 µm (0.18 to 6 mils), and the WC-4 model can prepare about 8 µm thick film.
3. Reasonable size design: Spreader width is 254mm (10 inches), enough to cover the standard baseplate; the total length of the rod is 305mm (12 inches), and there are 25mm hand-held parts at both ends, which is easy to operate; the diameter of the rod is 12.7mm (1/2 inch), providing good rigidity.
4. Durable material: made of all stainless steel, corrosion-resistant, even with water-based paints are not easy to rust, and nonmagnetic, can be used with the steel plate on the magnetic card.
Principle
Mayer Rods work with wires (wires) that are tightly wound on their surface. When the operator pours paint onto the substrate and scrapes it with a coating applicator at constant pressure and speed, the wound wires define and scrape away excess paint, leaving a wet-film of uniform film thickness on the surface of the substrate, determined by the diameter of the wires.
Applications
Coating R & D and testing, inks performance evaluation, Adhesive Spreader, laboratory sample prepative, quality control
Standards
The data did not mention specific compliance criteria.
Steps
1. Pour or drop the paint sample to be tested on one end of a flat, clean substrate.
2. Place Mayer Rods (e.g. WC-4) perpendicular to the substrate, ensuring that the portion of the wire wound is in full contact with the paint.
3. With uniform and stable pressure and speed, scrape the coating applicator along a straight line to the other end of the substrate.
4. Lift the coating applicator, leaving a wet-film with uniform film thickness on the substrate.
5. According to the test requirements, wet-film drying or follow-up performance test.
Notice
• Ensure that the surface of the coating applicator and substrate is clean, drying and free of contamination before use.
• When operating, keep the coating applicator perpendicular to the surface of the substrate and apply uniform and constant pressure.
• The scraping speed should be stable to obtain a film with consistent film thickness.
• After use, the coating applicator should be cleaned with a suitable solvent in time to prevent the coating residue from curing.
• Please select the appropriate bar type (wire diameter) according to the required wet film thickness.
• Avoid bumping or bending the coating applicator to prevent damage to the wound wire from affecting the film accuracy.
