A4 Conference proceedings

A Theory of Interaction Mechanism between Laser Beam and Paper Material


Open Access publication

LUT Authors / Editors

Publication Details
Authors: Piili Heidi
Publication year: 2015
Language: English
Related Journal or Series Information: Physics Procedia
Title of parent publication: 15th Nordic Laser Materials Processing Conference, Nolamp 15
Volume number: 78
Start page: 163
End page: 173
JUFO-Level of this publication: 1
Open Access: Open Access publication

Abstract
Paper making and converting industry in Europe is suffering from transfer of basic manufacturing to fast-growing economies, suchas China and Brazil. Pulp and paper production volume in Finland, Sweden and France was the same in 2011 as it was in 2000.Meanwhile China has tripled its volume and Brazil doubled. This is a situation where innovative solutions for papermaking andconverting industry are needed. Laser can be solution for this, as it is fast, flexible, accurate and reliable.Before industrial application, characteristics of laser beam and paper material interaction has to be understood. When thisfundamental knowledge is known, new innovations can be created. Fulfilling the lack of information on interaction phenomenacan assist in the way of lasers for wider use of technology in paper making and converting industry.This study was executed by treating dried kraft pulp (grammage 67 g m-2) with different laser power levels, focal point settingsand interaction time. Laser equipment was TRUMPF TLF HQ2700 CO2 laser (wavelength 10.6 μm). Interaction between laserbeam and dried kraft pulp was detected with multi-monitoring system (MMS), which consisted of spectrometer, pyrometer andactive illumination imaging system.There is two different dominating mechanisms in interaction between laser beam and paper material. Furthermore, it was noticedthat there is different interaction phases within these two interaction mechanisms. These interaction phases appear as function oftime and as function of peak intensity of laser beam. Limit peak intensity divides interaction mechanism from one-phase interactioninto dual-phase interaction.

Last updated on 2017-22-03 at 13:50