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The effect of veneer-modifcation on the bond-strength in laminated veneer products
Linneaus University.
SP Technical Research Institute of Sweden, SP Wood Technology, Skellefteå.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
Department of Forestry and Wood Technology, Linnæus University.
2015 (English)In: Pro Ligno, ISSN 1841-4737, E-ISSN 2069-7430, Vol. 11, no 4, 43-49 p.Article in journal (Refereed) Published
Abstract [en]

A major problem in the manufacture of three-dimensional laminated veneer products (LVP) is damage due to stretching and/or buckling of the veneer. To reduce or eliminate this problem, veneer densification or adding a strengthening layer to the veneer can be an alternative. To study how veneer modification influences the veneer-to-adhesive bond strength, three methods of modification were studied in relation to an unmodified reference veneer: (1) densified veneer, (2) veneer pre-bonded with paper and hot melt adhesive (HMA), (3) veneer pre-bonded with non-woven polypropylene (NW) fabric glued to the veneer (a) with a urea formaldehyde (UF) adhesive, (b) with a mixture of UF and polyvinyl acetate (PVAc) adhesive, and (c) with a PVAc adhesive. Densification, pre-bonding with paper, and NW with UF/PVAc adhesive mixture resulted in no or only a slight decrease in strength of the bond-line compared to the reference. NW glued with UF or PVAc adhesive showed a considerable reduction in the strength of the bond-line. The climatic cycling had no significant influence on the bond strength.

Place, publisher, year, edition, pages
2015. Vol. 11, no 4, 43-49 p.
Keyword [en]
Forestry, agricultural sciences and landscape planning - Wood fibre and forest products
Keyword [sv]
Skogs- och jordbruksvetenskap samt landskapsplanering - Träfiber- och virkeslära
Research subject
Wood Technology
URN: urn:nbn:se:ltu:diva-8099Local ID: 68d7959f-3983-4e26-bbed-a312df352950OAI: diva2:980989
Validerad; 2016; Nivå 1; 20151223 (dicsan)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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