抄録
N-1 paper machine at YONAGO mill, OJI Paper, has been in operation since September 1997. The new line has the capacity of 540 tpd of woodfree coated base paper. N-1 paper machine was supplied by Mitsubishi Heavy IND. LTD. of Japan and incorporated state of the art new technologies, such as horizontal gap former and double shoe press, to achieve high productivity and good paper quality. The wire width of the new machine is 8. 0 m with the trim width of 7. 36 m and the design speed is 1, 400 m min.
The horizontal gap former, “M H Former-H” combined with the “Concept IV-MH” headbox and the consistency profiling enables the wide paper machine to run at higher speed while maintaining superior sheet quality. The press section is conventional “TRI-VENT” roll configuration except the “ENP -C” shoe press at the third and the fourth nip, and the transfer felt at the fourth press. Each shoe press has the maximum loading capacity of 1, 000 kN/m. This article introduces the latest operating experience of the N-1 paper machine, focusing on the wet end operation.
