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Fluoron, Inc., Elkton, MD, say its Fluor-XR Extreme Release Coating is a highly differentiated product that combines the wear resistance of a tungsten carbide surface with the superior release properties of Fluoron’s proprietary extreme release coating technology.
The Fluor-XR installation consists of a three-step process. First, the roll surface is prepared using vacuum grit blasting equipment to provide a clean working surface. An 80-micron layer of tungsten carbide is then applied using high velocity oxygen fuel (HVOF) flame spray equipment. Finally, Fluoron’s proprietary Extreme Release coating is applied to produce a finished high-release surface.
Applications. Because of the excellent wear resistance coupled with extreme release properties, Fluor- XR release coating is ideal for felt rolls, paper carrying rolls or dryer cans in recycled paper applications that have trouble with build-up or stickies.
Fluoron provides all three steps of the application process for rolls of any diameter or length.
Unlike traditional roll covers or coatings, Fluor-XR technology embeds the release coating within a protective matrix of tungsten carbide which enables superior release even under the most aggressive services such as doctored dryer cylinders. In addition to having release properties superior to traditional coatings, Fluoron’s proprietary Extreme Release top coating technology cures at ambient temperatures, which shortens curing duration and allows for a wider range of applications.
Three-year development program. Fluor-XR Extreme Release Coating was produced in an extensive R&D program. For over three years, Fluoron engineers worked to optimize the formulation to maximize release while maintaining wear resistance.
To test wear resistance and simulate release under aggressive doctor blade operation, sample coupons are prepared with Fluoron’s proprietary tungsten carbide matrix and Fluor-XR top coat. The samples are placed in a rotating wear testing device where a steel blade is scraped across the sample surface under 300-lb/in≤ force for 4000 cycles.
To simulate recycle stickies adhesion, TESA 7475 standard tape is applied to both the worn and unworn sample surfaces and conditioned at 160°F for 24 hours. The TESA 7475 tape is removed from the sample surface using a ChemInstruments AR-1000 adhesion release tester which measures the force required to remove the tape from the surface.
Test results show that Fluor-XR provides over 40 times better release than the best TEFLON® sleeves in adhesive sticky types of applications, even after extensive wear testing.
Fluoron offers a free sample coupon of its Fluor-XR technology so that it can be tested in the mill.
* TEFLON® is a registered trademark of The Chemours Company FC, LLC, used under licence by Fluoron, Inc.
Fluoron, Inc. www.fluoron.com