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Coater
Plant. Paper Width: 3000 mm
Coating
preparation
Clay delivered to mill in powder form. Clay is fed to two high shear mixers..
After high shear mixers, the clay is cleaned by passing over two 1200 mm
vibrating screens with stainless micro filament wires.
Clay transferred to two external green tanks outside clay store.
Clay pumped to number one and two blend tanks located inside coater building.
Next to clay plant, stainless tank outside for calcium carbonate and after this
tank product is screened by a Cellier 1200mm vibrating screen.
High shear mixer on upper level for 2-CMC product.
In basement, starch cooker using powder bag supply with make up unit and in line
cooker.
External starch cooker with four tanks: one is for starch slurry and the
remaining three are for cooked starch.
Two external chests, lagged (white), used for storing latex.
External tank for coater waste coatings. This is pumped to effluent Sludge Tank.
Internal pre mixing for the BTG roll coater and two in-line self cleaning
filters.
In the coater basement, there are two indicators for oil flow to central lube
system for the coater.
In basement, three stainless tanks with coating product for coaters and they sit
next to stainless hot water tank.
Coater floor level: two sets of in-line stainless filters prior to coating
heads.
Typical products
Single coated Matt- Gloss of 25% and smoothness of 3.5 PPS10. Grammage range
from 75 to 150. Suitable for HSWO and sheet offset printing.
Single coated gloss papers. Gloss of 68% and a smoothness of 1.7 PPS10 Grammage
range from 75 TO 90. Suitable for HSWO and sheet offset printing.
Double coated Gloss with a gloss of 80% and a smoothness of 0.8PPS10. Grammage
range from 100 to 170. HSWO grade also produced.
Double coated Silk Gloss of 35% and a smoothness of 1.5PPS10.Grammage range
fom115 to 170.
Double Coated Satin Gloss of 40% and a smoothness of 3.5 PPS10.
Coatings include carbonate/clay with potato starch/latex binders.
Coater
Manufacturer: Beloit Walmsley, year 1987, deckle width 3000 mm. Products:
centrefold Gloss and Matt papers, High Gloss, Matt and Silk also other papers.
Production 72,000 t/year, 3000mm deckle and speed 800 m/min. Coater speed 750 to
800 m/min, production 10 to 20 tpd, grammage 75 to 170 gsm. The coater has a
high speed camera system fitted. Drive R/H fom the unwind.
Precoater
Beloit flying splice unwind with driven unwind roll and roll accelerator,
working width 3000mm, base scanner: Measurex 2000 measuring the moisture and the
gsm.
BTG base coater with twin HSM blade coaters and typical solids are approximately
60%. The typical coating weights approximately 10 to 12 gsm. BTG HSM coater head
applying coating to both sides concurrently followed by the two Beloit blade
coaters. Coating weights applied: 10 to 14 gsm/side. Beloit heads apply 10 to 16
gsm/side. The maximum coating weight applied is 50 gsm.
Impact
IR dryers
followed by two air float dryers then into the Spooner dryer.
Measurex scanner 2001 measuring the moisture and the gsm.
Top coater Beloit manufacture with Metso profiler unit.
Marsden
IR dryer
Air
Float Dryer
with air blower around dryer prior to entry to seven drying cylinder section,
cylinders 1828 mm diameter, face steam pressure 410 kPa, A/F bearings and with
central lubrication. Sole plate centres 4114mm.
Scanner Measurex model 2001 measuring moisture and gsm.
Beloit top coat coater with Metso automatic profiler unit.
Six Beloit drying cylinders 1524 mm diameter, face 3276 mm,
rope groove 101 mm and centres 4114 mm, pressure 410 kPa, 60 psi, A/F bearings
and central lubrication.
Calendar frames (rolls removed and not in use).
Measurex scanner 2001 measuring moisture and gsm.
Beloit
horizontal reel up.
On the coater level is a set of support stands to hold reel shells with reel end
paper. This area used to remove paper from reel shells which falls to base level
for re- pulping.
DC sectional drive
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