PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 4, Number 2, 2018
Fig.3: C2.yntec ht, same position ∆T 18°C An application example shows a case, where the customer faced frequent and unpredictable damages of the cover due to high temperature differences delta T at the edges (Fig 2) and high impacts coming from deposits. In close cooperation with the customer, SchäferRolls developed a special material, aiming at reducing these difficulties. Regular on-site measurements and monitoring let to a solution in which a special structure of the cover reduces high differences in temperature delta T between areas that are touched resp. not touched by paper web: This C2.yntec ht cover – a further development of the current C2.yntec – cools down quickly and withstands high temperatures in the edge area (Fig. 3). Secondary, temperature peaks caused by e.g. Calcoil systems or TrioRolls (segment guide rolls) are compensated. As a result roll cover damages and in consequence unscheduled shut-down time are being avoided. Furthermore, the expected grinding interval of 30 weeks was exceeded by more than 20%.
C2.yntec ht Technical data Hardness E-Modulus Wear rate w s Colour
88 +/- 2 Shore D
pink
4100 MPa
290 300
Fracture toughness G |c
Surface roughness in operation Ra
0,20 μm 14 mm 6 mm 100 °C
Cover thickness
Usable thickness of the functional layer
Max. operating temperature
Max. ∆ T
20 K
Max. operation speed V max
1500 m/min 450 kN/m
Max. line load
www.schaeferrolls.com (October 2018)
Products & Services
Page 17 of 40
Made with FlippingBook Ebook Creator