Pitch spots, wire
1. Clean forming fabrics. — low-pressure steam can be used to blow pitch spots out of metal wires. — for plastic wires, pressure must be less than 3.5 kg/cm2 and temperature below 150 F . 2. High-pressure showers are usually effective on pitch. 3. Chemical treatment of the wire can reduce the tendency for pitch […]
Dirt in the sheet
Note: Further back in the integrated mill, broke chests, white water systems, screens, and cleaners should be constantly checked, washed, and changed as experience dictates. 1. Following a shutdown: (a) all screens, wire pits or silos, seal pits, stuffboxes, etc., should be emptied and hosed out. — pulpers, beaters and chests are to be thoroughly […]