What Are Doctor Blades, Roll Cleaning Blades, and Scrapers?
Doctor blade? Roll cleaning blade? Scraper? The term is used differently depending on the industry, but the product’s purpose is the same–to clean or remove contaminants from a roll surface. A doctor blade, roll cleaning blade, or scraper is any material in stick form that is run against a roll and is used to keep the roll clean. Materials can be just about anything like composite, metal, or plastic.
It’s not always easy to determine which doctor or roll cleaning blade is best for a given application. Understanding the roll surface, material, hardness, cleaning requirements, speed, and temperature are all important when selecting the most appropriate blade. Determining what the user is trying to achieve and how a clean roll would benefit the process are also essential elements. Most importantly, relying on experts who have extensive knowledge and application expertise in both doctoring and roll cleaning can make a significant difference in selecting a cost-effective blade for any given application.