Wearlon® 2020.98

Anti-Stick Properties
Pulp and Paper Industry

ADVANTAGES – Pulp and Paper Industry

• Equipment Coating
  • Easy clean
  • Roll coating (non-stick)
  • Forming fabric application
  • Press application
  • Easy maintenance
  • Water and waste water treatment
  • Improved equipment efficiency

Extensive testing at the University of Oulu in Finland demonstrated the excellent performance properties of Wearlon 2020.98 in the paper and converting industries.

University of Oulu, Finland Fibre and Particle Engineering Laboratory Department of Process and Environmental Engineering

Measurement of nonstick property

The nonstick property of different coatings was measured with tape release test. The method is modified from TAPPI UM 502 using ABgene PCR adhesive film 0558 (Applied Biosystems Corp.) The test tape is attached to surface and then peeled off 180° angle at 1 inch/min speed. Required force was measured. Before every measurement surface was cleaned and temperature was measured.

Release properties of test roller

Roller was first coated with tungsten carbide and then with different nonstick coatings. Nonstick properties of these coatings were measured with tape release test.

• Wearlon 2020.98 has excellent release as a coating on rolls as demonstrated above.
• Wearlon 2020.98 excelled when compared to Dupont 954-203 and Dupont 532-8110 upon monitoring the release force at the start and after 4 weeks immersion in sulphate pulp at 194°F. This test is labeled CWSP test (Concentrated Water Sulphate Pulp test). Concentrated water from sulphate pulp was prepared by removing fibers from sulphate pulp. The volume of the water was decreased in half by evaporation.
• Wearlon 2020.98 maintained consistently lower release when compared to Xylan 1010, Dupont 958-203, Dupont 958-406, and Dupont 958-414 after two and four weeks immersion in TMP (Thermal Mechanical Pulp) at 86°F.
• Wearlon 2020.98 release force remained lower than Xylan 1010, Dupont 958-203, Dupont 958-406, and Dupont 958-414 when immersed in 10% sulphuric acid for 24 hours at room temperature.
• Immersion for 24 hours in a temperature of 194°F in caustic baths of 10% and 40% sodium hydroxide indicated the following. The 40% sodium hydroxide was not as detrimental to the Wearlon 2020.98 as the 10% solution was. The Dupont 958-203 performed better in this test. Xylan 1010, Dupont 958-406, and Dupont 958-414 were washed away in the 40% sodium hydroxide test. The Wearlon 2020.98 release force was increased from 50N to 70N after 6.5 hours in the 10% sodium hydroxide bath.
• Heat aging at 221°F for four weeks reduced the release force of the Wearlon 2020.98.