Fluoron Inc. offers FEP HST (Heat Shrinkable Tube) roll cover products made from Teflon® fluoropolymer to handle serious complications of sticking, buildup, corrosion, pits and grooves.  Roll covers made from Teflon® FEP (Fluorinated Ethylene Propylene) are available in any diameter and custom fabricated to your roll size and application (seamless or seamed).  Standard thickness' are .020" and .060", and custom roll covers are available.  All Fluoron roll covers are available in either Type N/A (No Adhesive) or Type A (etched interior with adhesive for bonding).

Product I:
Common HST (seamless and seamed) shrinks in diameter only and is made from Teflon® FEP.  If HST is currently in use at your mill, please help us by specifying which product you're presently using, including the type and thickness.  [Specify Type N/A (No Adhesive) or Type A (etched interior with adhesive for bonding)].

Product II:
HST shrinks in both diameter and length to reduce wrinkle problems during installation.  Installation techniques are different from Product I. Available in seamed, seamless, Type N/A and Type A.

Product III: "Fluoro-Flex"™
For Metal-Clad® and Metrol® segmented bowed rolls.

Product HT:
High Temperature bondable HST made from PFA.

Product OMS:
Our dryer covers are made from .020" Teflon® FEP and seamed on the dryer in the machine.

Dryer Covers made with Teflon® FEP

The On Machine Seaming (OMS) with dryer covers made with Teflon® FEP provide the best release on the first two dryers after the size press and coaters. Dryer covers also reduce the unwanted draw between dryers. Dryer covers are made from .020" Teflon® FEP and seamed on the dryer in the machine.

The dryer’s surface is first cleaned to provide a good surface for bonding. Next, the heat shrinkable film is rolled around the dryer and the sealer is put in place. The film is then sealed to complete the tube with the seal’s strength as strong as the material itself.

The dryer is then heated up to 250°F shrinking down the sleeve. Once, the sleeve is shrunk tight to the dryer the roll cover is bonded by injecting the adhesive under the sleeve. It is then cured at maximum temperature.

The complete installation is accomplished in 8-12 hours, leaving a smooth as glass finish.

 

 

 

 

 

Properties of Fluoron Roll Covers made with Teflon® FEP

Property	Values	ASTM Test Methods
THERMAL
Melting Point	530ºF
Shrinkage Temperature	280ºF
Flammability	Non-Flammable	D635
PHYSICAL
Diameter Range	Up to 15'
Thickness Range	.010" to .125"
Ultimate Tensile Test	3000 psi	D882-61T
Elongation	250%	D882-61T
% Diameter Shrinkage @ 250ºF	10% minimum
Max permissable external loading, 25ºC ("Rock Hard" calender rolls)	190 pli
Hardness, 25ºC      P&J Plastometer      Shore Durometer (A Scale)	17 A96
Machining Qualities 1	Excellent
Clarity	Transparent
Wettability (Contact Angle)	108º
CHEMICAL
Effect of all acids	None2	D543
Effect of all alkalies	None2	D543
Effect of all organic solvents	None2	D543
Water absorption 1/8" thickness	<0.01%	D570

Notes:	1 Recommended parameters on request
	2 No visible change, pitting or embrittlement in spite of time or temperature

*Teflon® is a registered trademark of DuPont used under license by Fluoron, Inc.

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OMS Printable Version
FEP Properties Printable Version

 

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