Open AccessThe influence of sanding system on wetting of Paulownia siebold et zucc.
Author(s) -
Milan Jaić,
Тања Палија,
Jovan Dobić
Publication year - 2010
Publication title -
glasnik šumarskog fakulteta - univerzitet u beogradu/glasnik šumarskog fakulteta
Language(s) - English
Resource type - Journals
eISSN - 2217-8600
pISSN - 0353-4537
DOI - 10.2298/gsf1001067j
Subject(s) - paulownia , wetting , materials science , contact angle , molding (decorative) , composite material , polyurethane , surface roughness , surface finish , distilled water , botany , chemistry , chromatography , biology
This paper presents the research of influence of wood surface preparation on the wetting ability of polyurethane coatings, by the method of contact angle. The samples were made of two species of Paulownia (Paulownia elongata and Paulownia fortunei). All the samples were processed by planing (molding). After molding, the samples were arranged in groups and sanded. In relation with wood grain direction, each group had a particular system of sanding, based on the numbering of sanding paper, program of displacement of sanding papers with different numbering and the direction of sanding. The quality of wood surface after sanding was expressed by the values of roughness parameters in the system 'M': Ra, Rz, Rv, Rp and Rt. The contact angle was measured using transparent polyurethane (PU) coating and distilled water. The influence of the system of sanding on the values of contact angle was analyzed by roughness parameter Ra