Excellent resistance to all normal process chemicals.

Recommended pH range: 4�9. Avoid prolonged expo-

sure to strong alkalis and acids or alcohols.

� Film sizer top and bottom rolls

� Gate rolls

Applications

� Superbly uniform �lm transfer

� Excellent wear resistance

� Good wad resistance

� Extended grinding intervals

� Suitable for processes with both surface

sizing and �lm coating (�swing machines�)

Bene�ts

CoteFalcon is an extremely wear resistant applicator roll cover designed for both�lm coating and surface sizing. It is excellent for operation with both smooth andgrooved rods and features high-quality coating �lm formation for ease of operation.

Polyurethane cover for surface sizing and �lm coating

CoteFalcon

Cleaning

Chemical resistance

Cover color

Hardness

Cover thickness

Maximum temperature

Surface roughness

Maximum loading

Green

25�65 P&J

15�25 mm

85°C

Ra 1.0�1.4 μm

120 kN/m

"(0.6�1.0 )

(185°F)

(40�55 μin)

pli(670 )

CoteFalcon technical data

Roll covers should ideally be cleaned with plain water

because strong chemicals may damage them. Soap or

sodium solutions may also be used, or the cover may

be wiped clean with an aliphatic hydrocarbon solvent.

If a lye solution is used, the roll surface must be

washed with clean water immediately a� er treatment.

Roll covers cannot withstand long-term exposure to

lye, acids or alcohols. Any extended exposure of cover

materials to excessive alkalinity (pH > 9) or acidity

(pH < 4) during operation or cleaning must be

avoided.

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Rolls used in press section or sizing or coating may be

cooled internally with water to balance the roll tem-

perature and to avoid pro� le changes due to tempera-

ture variations in the cross direction. � e incoming

water temperature should not be below 35°C (95°F);

ideally it will be close to the process temperature. � e

maximum water outlet temperature should be below

60°C (140°F). � e temperature di�erence between

inlet and outlet should preferably be less than 5°C

(9°F).

Polyurethane covers absorb water over time. A water-

logged cover will bond less well with the metal roll

body and must therefore be allowed to dry before

reuse. � e drying time between runs should be two-

thirds of the last running period, with a minimum of

four weeks. � e cover can be reground before drying.

Roll covers must be protected at all times. Roll temper-

ature should remain above 0°C (32°F) during transpor-

tation. When rolls are shipped in cold weather

(below 5°C/40°F), it is recommended to allow them to

warm up in their transportation packaging in a heated

place for at least 24 hours before unpacking. Sudden

temperature changes may damage roll covers. Store

rolls in a dry roll storage room at 10�30°C (50�86°F).

Always support rolls by their journals. Protect the

entire covered roll surface with a layer of paper or card-

board. Never store rolls resting on their cover.

� Sizer covers are usually not doctored, but steel

sealing doctor blades may be used

� If doctoring is needed, plastic blades are preferred,

e.g. Valmet's ValPoly blades

� Blade size: 1.5 mm (5/8 ) thick × 75 mm (3 ) wide" "

� Blade angle: 20° ± 1°

� Maximum blade load: 90�140 N/m (0.5�0.8 )pli

� Oscillation is recommended.

e-mail: paper.service@valmet.com, www.valmet.com/productvaultSpeci�cations in this document are subject to change without notice.Product names in this publication are all trademarks of Valmet Corporation.

For more information, contact your local Valmet o� ce. www.valmet.com

Patch repair may be considered in the case of smaller

surface problems. Please consult Valmet.

Patching and repair

Doctoring recommendations

Roll cooling

Cover drying

Transportation and storage

Valmet CoteFalcon