Effect of Veneer Drying Process on Some Technological Properties of Polystyrene Composite Plywood Panels


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ÖZTÜRK H., DEMİR A., DEMİRKIR C., ÇOLAKOĞLU G.

DRVNA INDUSTRIJA, cilt.70, sa.4, ss.369-376, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 70 Sayı: 4
  • Basım Tarihi: 2019
  • Doi Numarası: 10.5552/drvind.2019.1844
  • Dergi Adı: DRVNA INDUSTRIJA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.369-376
  • Anahtar Kelimeler: polystyrene composite plywood (PCP), veneer drying, mechanical properties, styrofoam, FORMALDEHYDE EMISSION, WOOD, STRENGTH
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

The aim of study was to determine the effect of veneer drying process on some technological properties of polystyrene composite plywood panels. For this reason, 2 mm-thick rotary cut veneers were obtained from beech (Fagus orientalis, Lipsky), Alder (Alnus glutinosa subsp. Barbata) and Scots pine (Pinus sylvestris L.) logs. The veneers obtained from three different wood species were divided into two groups to produce polystyrene composite plywood (PCP) and traditional plywood. While PCP was produced both air dried (at 20 degrees C) and oven dried (at 110 degrees C), the veneer sheets for production of traditional plywood were dried at 110 degrees C until reaching 7 % equilibrium moisture content. Two different types of polystyrene with high density (30 kg/m(3)) and low density (16 kg/m(3)) were used as bonding material for PCP panel production. The urea-formaldehyde adhesive was used as a bonding material for traditional plywood panels. Bonding shear strength, bending strength, modulus of elasticity and density of plywood and polystyrene composite plywood panels were investigated It was found that the technological properties observed in the study of composite plywood panels manufactured with natural dried veneers gave similar results compared to those of composites produced with technical dried veneers.