Mika Anttila: Release force of patterned surface chemistry

Tiivistelmä

The objectives of this research are:

• To develop ISIT-based method to measure the actual release force of the paper
• Understand the effect of paper roughness on release force
• Understand the effect of ink film thickness on release force (Stefan’s law)
• Understand the effect of patterned surface chemistry (low surface energy) on release force
• Understand whether ink can spread over small low energy patterns after printing nip

Timetable of the research project:

• Theoretical studies and literature survey 7/2015 – 12/2015
• ISIT-based method to measure the actual release force of the paper 7/2015 – 12/2015
• Effect of paper roughness on release force 7/2015 – 3/2016
• Effect of ink film thickness on release force (Stefan’s law) 7/2015 – 6/2016
• Effect of patterned surface chemistry on release force 7/2016 – 6/2017
• Study of ink spreading over tiny low energy patterns 7/2016 – 12/2017
• Finalizing the thesis dissertation in 6/2018

The hypothesis of this work is that patterned surface chemistry (low surface energy) on the paper surface is able to reduce the effective contact area (Aeff) between ink and glossy paper.

One hypothesis is that if the patches are tiny enough the ink is able to spread to the covered area after the ink film split in the printing nip.

This method is cost effective way to control the glossy paper release forces from the rubber blanket; thereby leading to higher apparent surface strength of the paper and reduced delamination of board in printing.

Yhteyshenkilö

• Mika Anttila
• mika.anttila@abo.fi