Products
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Raw Materials
Processes
- Binding
- Collating
- Corner cutting
- Creasing
- Cutting
- Cutting to size
- Die-cutting
- Edge painting
- Flocking
- Foil stamping
- Folding
- Gluing
- Grommeting
- Hole drilling
- Hole punching
- Hot Stamping
- Laminating
- Numbering
- Padding
- Perfect binding
- Perforating
- Round cornering
- Saddle stitching
- Sealing
- Spiral binding
- Stapling
- Tabbing
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Operations
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- Blistering or cockling
- Blowing in dryers
- Breaks, dryer section
- Build-up on dryers
- Curl in paper
- Cutting in dryers
- Dimensional stability
- Dryer area defects
- Dryer felts
- Dryer temperature control
- Dryer wraps
- Drying uniformity
- Evaporation rate, maintaining
- Felt tension control
- Hot dryer bearings
- Moisture streaks in dryers
- Over-drying
- Shrinkage control
- Uneven drying
- Air in the system
- Blotches in the sheet
- Breaks, wet end
- Crush
- Dirt in the sheet
- Drainage varying
- Grainy edges, reduction
- Holes in the sheet
- Pinholes, reducing
- Sheet sealing
- Stock jumping
- Stock skating on wire
- Stock sticking to wire
- Strings, elimination
- Watermarking with ring
- Wet/dry line moving
- Wire marks
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- Breaks, press section
- Bulk improvement
- Crushing, press
- Leaking doctor blades
- Moisture profile
- Peeling, press rolls
- Pickup problems
- Pitch on doctor blades
- Press cuts/wrinkles
- Press picks
- Rewet problems
- Shadow marking
- Sheet blowing, press nips
- Sheet crushing
- Sheet following top press rolls
- Sheet stealing
- Vibration at press
- Water removal (CD)
- Water removal, wet press
- Wrinkles, press section
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- Annular rings
- Baggy rolls
- Bursting or cracked rolls
- Cleaner slitting
- Corrugations
- Corrugations, winders
- Defective splices
- Dust in rolls
- Dust in the rolls
- Good roll condition, off winder
- Hard and soft spots/ridges
- Interweaving
- Loose cores
- Loose paper, in roll
- Nicked edges
- Out-of-round rolls
- Reel or roll quality
- Rewound roll quality
- Run-in of slit rolls
- Shipping roll characteristics
- Snap-offs
- Soft edges
- Starred rolls
- Telescoping
- Turned edges
- Variable density rolls
- Winder cracks
- Winding requirements
- Wrinkles, winder
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Careers
Pulp & Paper Manufacturing
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Companies
1. Stock bundles, referred to as strings, usually arise from the screens, pump impellers, or cleaners.
2. Use adequate and well-maintained screening.
— check clearance of the Selectifier screen paddles.
3. Avoid protuberances at pipe joints.
— use special flanges after screens, i.e., only metal-to-metal (no gaskets) with all welded joints between final screen and headbox manifold ground and polished .
4. Avoid any irregularity in the headbox, e.g., corroded perforated roll, corroded area over a patch bolt, etc.
5. Avoid felt hair or other such contraries entering the system via broke beater.
— maintain exceptional cleanliness in broke beater area.
6. Make sure that deflectors are up to the forming fabric.
— water thrown around by table rolls following a leaking deflector can form strings or worms on the wire.
7. Polish slice with jeweler’s rouge.
8. Check condition of the headbox profile bar where used.
— check for corrosion and the condition of the bottom edge.
For a related topic, see Worms.