Roll cover

Patent metadata

Field	Value
Publication number	US-10145065-B2
Application number	US-201314389421-A
Country	US
Kind code	B2
Filing date	Mar 22, 2013
Priority date	Mar 30, 2012
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A roll cover is particular suited for use in an apparatus for producing or surface finishing a fibrous web, such as a web of paper or of cardboard. The roll cover is formed on a roll core of metal or of a fiber-reinforced plastic and includes a matrix system wherein fillers are provided. The fillers provided are three or more in number and they have different median particle sizes.

First claim

The invention claimed is:

1. A roll cover assembly, comprising:
a roll cover formed on a roll core of metal or of a fiber-reinforced plastic, said roll cover being formed of a fiber-reinforced plastic including a matrix system with fillers in said matrix;
said fillers being at least three in number and said fillers having distinctly different median particle sizes, with a first filler material having a median particle size in a range from 1 to 100 nm, a second filler material having a median particle size in a range from 50 to 2000 nm, and a third filler material having a median particle size in a range from 0.5 to 15 μm.

2. The roll cover assembly according to claim 1 , configured for use in an apparatus for producing or surface finishing a fibrous web selected from the group consisting of paper and board.

3. The roll cover assembly according to claim 2 , wherein said first filler material is selected from the group consisting of oxides, carbides, nitrides, alumino-silicates, silicates, sulfates, carbonates, phosphates, titanates, carbonanotubes, carbonanofibers, metals of mineral or synthetic origin and mixtures thereof.

4. The roll cover assembly according to claim 3 , wherein said first filler material is a surface-modified filler.

5. The roll cover assembly according to claim 1 , wherein:
said first filler material has a median particle size in a range from 5 to 50 nm;
said second filler material has a median particle size in a range from 100 to 500 nm; and
said third filler material has a median particle size in a range from 1 to 7 μm.

6. The roll cover assembly according to claim 1 , wherein:
said first filler material has a median particle size in a range from 10 to 30 nm;
said second filler material has a median particle size in a range from 100 to 300 nm; and
said third filler material has a median particle size in a range from 2 to 4 μm.

7. The roll cover assembly according to claim 1 , wherein said at least three fillers have particle size distributions that are overlapping or non-overlapping.

8. The roll cover assembly according to claim 1 , wherein at least two of said fillers are of an identical material.

9. The roll cover assembly according to claim 1 , wherein said at least three fillers are formed of a different material.

10. The roll cover assembly according to claim 1 , wherein at least said second filler material and/or said third filler material of said at least three fillers is selected from the group consisting of: oxides, carbides, nitrides, aluminosilicates, silicates of mineral or synthetic origin and mixtures thereof.

11. The roll cover assembly according to claim 1 , wherein a content of said at least three fillers in said matrix system lies between 0.5 and 30 volume percent.

12. The roll cover assembly according to claim 11 , wherein the content of said first filler material lies between 0.5 and 20 volume percent.

13. The roll cover assembly according to claim 11 , wherein the content of said second filler material lies between 0.5 and 5 volume percent.

14. The roll cover assembly according to claim 11 , wherein the content of said third filler material lies between 0.5 and 20 volume percent.

15. The roll cover assembly according to claim 11 , wherein the content of said first filler material lies between 1.5 and 15 volume percent, the content of said second filler material lies between 1 and 3 volume percent; and the content of said third filler material lies between 3 and 15 volume percent.

16. The roll cover assembly according to claim 1 , wherein said matrix system is a thermoset selected from an amine- or anhydride-crosslinked or self-crosslinking epoxy resin or an isocyanate ester or a mixture thereof.

Assignees

• Voith Patent Gmbh

Inventors

• Grohmann Franz
• Breineder Martin
• Breineder Thomas

Classifications

• D21G1/0233

  Soft rolls · CPC title

• D21G1/0246 Primary

  Hard rolls · CPC title

• D21F3/08 Primary

  Pressure rolls · CPC title