Surface Characteristics of Scots Pine Veneers Produced with a Peeling Process in Industrial Conditions

Agnieszka Laskowska, Paweł Kozakiewicz, Marcin Zbieć, Patrycja Zatoń, Sylwia Oleńska, Piotr Beer

Abstract


A test method was developed to evaluate the surface characteristics of veneers produced using the peeling process. Rotary cut Scots pine (Pinus sylvestris L.) veneers, which were produced from logs soaked at 65 °C for 42 h prior to peeling and dried at 125 °C, were used as the test specimens. The pine veneers were produced under industrial conditions. The density variation of the round wood was determined using X-ray computed tomography, the thickness variation of the pine veneers was measured using an optical microscope, and the structure of the veneers was examined using a scanning electron microscope. The pine wood was characterised by the density variation in the transverse section. At the same moisture level, broad-ring pith-adjacent juvenile sapwood had a lower density compared with that of perimeter-adjacent mature wood. The clear lack of density homogeneity was seen in the width of the subsequent annual growths. The roughness of the pine veneers demonstrated significant variation, depending on the tool angle (17° and 21°), wood area (sapwood and heartwood), and veneer side (tight and loose). The veneer thickness had a significant impact on the roughness values measured perpendicular to the grain.

Keywords


Computed tomography; Peeling; Pine wood; Scanning electron microscopy; Surface characteristics; Veneer

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Welcome to BioResources! This online, peer-reviewed journal is devoted to the science and engineering of biomaterials and chemicals from lignocellulosic sources for new end uses and new capabilities. The editors of BioResources would be very happy to assist you during the process of submitting or reviewing articles. Please note that logging in is required in order to submit or review articles. Martin A. Hubbe, (919) 513-3022, hubbe@ncsu.edu; Lucian A. Lucia, (919) 515-7707, lucian.lucia@gmail.com URLs: bioresourcesjournal.com; http://ncsu.edu/bioresources ISSN: 1930-2126