IP Library › Granted Patent US 6,880,456
Granted Patent B2
US 6,880,456 · App. 10/469,269 · Granted Apr 19, 2005

Polymer coating and a method for adjusting the properties of the polymer coating of a roll or a belt

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Quick Facts
Patent No.
US 6,880,456
App. No.
10/469,269
Granted
Apr 19, 2005
Kind
B2
Abstract

The invention relates to a method for adjusting the properties of the polymer coating ( 2 ) of a roll or a belt ( 3 ), whereby the roll or the belt is used for calendering a fibrous web ( 4 ) in a roll nip (N), which is formed between the roll or the belt and its backing roll ( 5 ), whereby the roll or the belt has a polymer coating comprising fibrous material ( 1 ). In the method, the thermal elongation coefficient and/or thermal conductivity of the polymer coating ( 2 ) are adjusted by directing the fibre direction of the fibrous material ( 1 ).

Claims (10)

1. A method for adjusting the properties of the polymer coating ( 2 ) of a roll or a belt ( 3 ), whereby the roll or the belt is used for calendering a fibrous web ( 4 ) in a roll nip (N), which is formed between the roll or the belt and its backing roll ( 5 ), whereby the roll or the belt has a polymer coating comprising fibrous material ( 1 ), characterized in that the thermal elongation coefficient and/or thermal conductivity of the polymer coating ( 2 ) are adjusted by directing the fibre direction of the fibrous material ( 1 ), so that the locally increased heat production of the polymer coating ( 2 ) results in a minor expansion or local reduction of the polymer coating at least in the radial direction (R) of the roll.

2. A method according to claim 1 , characterized in that in the method, the elasticity of the polymer coating ( 2 ) is further adjusted by changing the proportion of the fibrous material and the resin contained by the polymer coating with respect to one another.

3. A method according to claim 2 , characterized in that the polymer coating ( 2 ) are adjusted by directing the fibre direction of the fibrous material by 45 degrees from the radial direction (R) of the roll at a maximum.

4. A method according to claim 3 , characterized in that the fibrous material ( 1 ) is carbon fibre.

5. A method according to claim 4 , characterized in that the fibrous material ( 1 ) is aramid fibre.

6. A method according to claim 5 , characterized in that the roll ( 3 ) is a paper roll.

7. A method according to claim 1 , characterized in that the polymer coating ( 2 ) are adjusted by directing the fibre direction of the fibrous material by 45 degrees from the radial direction (R) of the roll at a maximum.

8. A method according to claim 1 , characterized in that the fibrous material ( 1 ) is carbon fibre.

9. A method according to claim 1 , characterized in that the fibrous material ( 1 ) is aramid fibre.

10. A method according to claim 1 , characterized in that the roll ( 3 ) is a paper roll.

Assignments (1)
CHANGE OF NAME Recorded Mar 27, 2014
From: METSO PAPER, INC.
To: VALMET TECHNOLOGIES, INC.
Reel/Frame 032551/0426 →