Nanocellulose Roll Cover Composition for Fibrous Web Manufacturing Rolls
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Solution Overview
Problem
Conventional polymer-coated rolls used in manufacturing fibrous webs, such as paper and board, lack enhanced mechanical properties like tensile strength, impact strength, and elongation, and there is a need for a reinforcing material compatible with various polymer matrices.
Innovation Solution
Incorporating nanocellulose material in the form of functional particles and fibers into the polymer matrix of the roll cover, which improves mechanical properties like tensile strength, impact strength, and elongation while maintaining or not reducing other mechanical properties like tear strength and abrasion resistance, and is easily compatible with different polymer matrices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional polymer layers are used to coat rolls, then the roll cover provides basic mechanical properties, but the tensile strength, impact strength and elongation are insufficient
Solution Approach 1:
The patent applies composite materials by combining nanocellulose particles with polymer matrices to create a roll cover with enhanced mechanical properties. The nanocellulose-reinforced polymer composite provides improved tensile strength, impact strength, and elongation while maintaining compatibility with various polymer matrices used in roll covers.
2Strength
If reinforcing materials are added to improve mechanical properties, then tensile strength increases, but other properties like tear strength and abrasion resistance may be reduced
Solution Approach 1:
The patent applies parameter changes by optimizing the size, shape, and distribution parameters of nanocellulose particles within the polymer matrix. By controlling these parameters at the nanoscale, the material achieves improved impact strength while maintaining adequate tear strength and abrasion resistance, resolving the trade-off between different mechanical properties.
Data Source
AI summary
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.