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Plywood made from plasma-treated veneers

Melamine uptake, dimensional stability, and mechanical properties
: Wascher, R.; Kühn, C.; Avramidis, G.; Bicke, S.; Militz, H.; Ohms, G.; Viöl, W.

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Journal of wood science 63 (2017), No.4, pp.338-349
ISSN: 1435-0211
ISSN: 1611-4663
Journal Article, Electronic Publication
Fraunhofer IST ()
dimensional stability; mechanical properties; plasma treatment; thermally modified wood veneer; plywood

This study investigates the dimensional stability and mechanical properties of plywood boards made of thermally modified and unmodified beech veneers that have undergone plasma pre-treatment before melamine resin impregnation. The water and melamine resin uptake and resulting weight percent gain of the veneers were investigated, whereby the air plasma pre-treated veneers showed improved liquid uptake. Five-layer plywood boards were then manufactured and tested for their dimensional stability, compressive strength, bending strength, and tensile strength. Plywood boards made of thermally modified and plasma pre-treated veneers showed a significantly improved dimensional stability, along with small influences on their mechanical properties.