NDLI: Experimental design to determine the manufacturing parameters of a green-glued plywood panel

Content Provider	Springer Nature Link
Author	Lavalette, Anne Cointe, Alain Pommier, Régis Danis, Michel Delisée, Christine Legrand, Guillaume
Copyright Year	2016
Abstract	The objective of this research was to investigate the technical feasibility of producing plywood by green-gluing technology. 2.5 mm thick rotary cut veneers obtained from steamed maritime pine (Pinus pinaster Ait.) logs were used. Plywood was manufactured under vacuum with veneers in a wet state. Five-layer plywood panels were produced using a one-component polyurethane adhesive to evaluate the effects of two parameters, the wood moisture content and the amount of adhesive, on the mechanical properties of plywood. First, a full factorial experimental design was realised to study the bond performance. Shear tests were carried out in order to determine the bond quality and failure type. It was observed that the values of plywood panels’ shear strength depend more on the wood moisture content than on the amount of adhesive applied. A model representing the shear strength of the panels according to the manufacturing parameters was established by using statistical analyses. Another part of this study focused on microscopic observations of the bondline in order to get information about the joint morphology and the degree of adhesive penetration into the wood structure. Results suggested that definite proportions of water (moisture content between 30 and 60 %) and adhesive have to be present on wood surface when gluing to create efficient bonds. These analyses were followed by the panel’s characterisation in flexure to validate the process.
Starting Page	543
Ending Page	551
Page Count	9
File Format	PDF
ISSN	00183768
Journal	Holz als Roh- und Werkstoff
Volume Number	74
Issue Number	4
e-ISSN	1436736X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-02-19
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wood Science & Technology Ceramics, Glass, Composites, Natural Methods Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Materials Science Forestry

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