Fibrous web manufacturing roll with cover having functional layer with nanocellulose material
AssigneeValmet Technologies Oy
InventorsJani Turunen, Marko Kovanen, Heikki Kettunen
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Abstract
The invention relates to a roll for use in a manufacture of a fibrous web, which comprises cellulosic fibers. The roll comprises a roll body with a cylindrical surface, and a roll cover, which is arranged to cover the cylindrical surface of the roll body. The cover has a functional layer, which has a polymer matrix and reinforcing material in the form of functional particles and/or functional fibers embedded in the polymer matrix. The functional particles and/or functional fibers has nanocellulose material. The invention relates also to the use of the roll.
Claims19
A fibrous web production roll for manufacturing a cellulosic fibrous web comprising:
- a roll metal body with a cylindrical surface;
- a roll cover of an epoxy matrix material on the cylindrical surface of and covering the roll metal body;
- wherein the roll cover matrix material epoxy is reinforced with embedded nanocellulose material of 0.5-2 percent by weight and wherein the nanocellulose material is surface-modified for chemical compatibility with the epoxy matrix material and wherein the nanocellulose material is in the form of at least one of functional particles and functional fibers.
A fibrous web production roll for manufacturing a cellulosic fibrous web comprising:
- a roll metal body with a cylindrical surface;
- a roll cover of a polyurethane matrix material on the cylindrical surface of and covering the roll metal body;
- and
- wherein the roll cover polyurethane matrix material is reinforced with embedded nanocellulose material of 0.5-2 percent by weight and wherein the nanocellulose material is surface-modified for chemical compatibility with the polyurethane matrix material and wherein the nanocellulose material is in the form of at least one of functional particles and functional fibers.
Dependencies are inferred from the claim text.