16 VALMET 3
INDUSTRY NEWS
base for batt fi bre needling. The fi bres are interlocked well with the special laminated base as a result of good fi bre adhesion. “Good fi bre entanglement can be seen in used felt analyses: In most cases, SprintMaster
felts suff er less wear than conventi onal laminated or special hybrid designs,” explains Juha Korvenniemi, business development manager for PMC at Valmet. “Of course, the reduced wear is partly due to increased nip
dewatering and reduced vacuum levels on some of the machines.”
Large savings potenti al The benefi ts of the SprintMaster felts are said to include a very good start-up, high nip dewatering,
Pulp Paper & Logistics
stability and durability. “They provide the mill with a large savings potenti al thanks to improvements in runnability, dry content, start- up and felt lifeti me and energy consumpti on,” Korvenniemi concludes.
Figure 4: The start-up and water removal properties of SprintMaster compared with those of a conventional laminated felt in a laboratory simulator. The nip dewatering level at the later stages in the lifetimes of both felts was almost the same, but SprintMaster reached the fi nal level much more quickly
Figure 5: Felt wear on fi ve paper machines measured in a used felt laboratory analysis
May/June 2015
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36