Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: Cenk Demirkir, Ozlem Ozgenc, Gursel Colakoglu, Umit C. Yildiz, Semra Çolak and Ismail Aydin
Pages: [27] - [49]
Received Date: December 30, 2013; Revised January 27, 2014
Submitted by: Zeki Candan.
In this study, the effect of UV irradiation on the bonding strength,
physical and chemical structure of plywood panels produced from
maritime pine (Pinus pinaster) veneers manufactured and dried
at different temperatures was studied. Accordingly, two different log
peeling temperatures (32°C and 50°C) and three different veneer
drying temperatures (110°C, 140°C, and 160°C) were chosen.
Five-ply-plywood panels with 10mm thick were manufactured by using
melamine-urea formaldehyde resin with 
solid content. UV irradiation process,
bonding strength, colour measurement, and surface roughness tests were
conducted on plywood panels according to ASTM G53, EN 314, ISO 7724-2,
and DIN 4768 standards, respectively. Effects of UV irradiation on
chemical structure of panels were determined with FTIR-ATR analysis.
Plywood panels manufactured from veneers peeled at 32°C log
temperature and dried at 140°C showed the lowest colour change
values. The bonding strength values of test panels decreased with UV
irradiation for all groups.
veneer drying temperature, UV ırradiation, surface roughness, bonding strength, colour measurement, FTIR-ATR.
