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Cellulose

pp 1–14 | Cite as

Preparation and characterization of cellulose-based barrier coatings for producing a release-liner out of a porous base paper

  • Sebastian von Gradowski
  • Christian Torborg
  • Markus Biesalski
Original Research
  • 10 Downloads

Abstract

A novel silicone release liner was prepared from porous base paper with a simple biogenic polymeric pre-coat. The introduced method does not require the typical complex pretreatment processes for a paper sheet, such as calendering or pre-coating with clay. Biogenic polymers, hydroxyethyl cellulose and methylcellulose, were used to close the pores of the paper sheet. In addition, we used polyvinyl alcohol (PVA), a commonly used barrier coating with known film-forming capabilities, as a reference to close the pores and prevent silicone penetration into the base paper. In particular, hydroxyethyl cellulose showed promising barrier properties similar to those of PVA coatings. Methyl cellulose is less appropriate for release liner production due to poor film stability and insufficient adhesion to the underlying base paper. Barrier-coatings should be applied by a blade coater rather than a roller coater to obtain homogenous coatings. When a thin silicone layer was applied to the barrier-coated papers, the measured release forces were significantly reduced from 6.5 N/25 mm, for siliconized papers without any pre-coat, to less than 1 N/25 mm after pre-coating, particularly with hydroxyethyl cellulose.

Graphical abstract

Keywords

Paper Barrier coating Release liner Silicone Biogenic polymer Cellulose 

Notes

Acknowledgments

The authors gratefully acknowledge Sappi Alfeld GmbH for funding this project and providing base papers as well as valuable discussions. The authors thank Martina Ewald at TU Darmstadt for various technical support, as well as Dr. Tobias Meckel for advice and introduction in CLSM measurements. The authors gratefully thank Dr. Wittner and Mrs. Pilz from Wacker Chemie AG for the determination of the extractables.

Supplementary material

10570_2018_2152_MOESM1_ESM.pdf (1.3 mb)
Supplementary material 1 (PDF 1290 kb)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Makromolekulare Chemie und PapierchemieTechnische Universität DarmstadtDarmstadtGermany
  2. 2.Sappi Alfeld GmbHAlfeldGermany

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