Research Of Non-Stick Materials For Applications In Tissue Machines

University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

Author: Oskar Olsson; [2016]

Keywords: ;

Abstract:

This thesis have investigated a few materials that exhibits non-stick

properties for applications in tissue machines. In the process of making

tissue there is problems with build up of fibres and glue. To

overcome these problems Valmet AB are looking to find coatings that

will facilitate cleaning.

The main problem area is the drying section where glue is used to

help the sheet to stick to the steam filled Yankee cylinder which is

performing the final drying of the sheet.

A basic discussion of the theory behind surface properties is made

before the materials are chosen, experiments are conducted and results

presented. The materials are ranked in order of performance based on

the experimental data. To ensure that the top performing materials

can be applied to usage in a real tissue machines a few possible future

studies is suggested.

The top performing materials were fluoropolymers. These materials

are very expensive which making their usage limited to critical parts.

Two silicon based materials performed at a surprisingly high level

making them highly attractive for wider usage in less critical areas in

a tissue machine.

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