STUDY CONCERNING THE FINISHING QUALITY OF SOLID WOOD PANELS MADE OF RESINOUS WOOD AND COATED WITH THE US-V TYPE FILM-FORMING PRODUCT*

Simona Alina VASILE
Student – “Transilvania” University of Brasov – Faculty of Wood Industry
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
Tel. 0040 268 412921/int.166. Fax 0040 268 415315. E-mail: pribtesabv2003@yahoo.com

Elena Mirela VASILE
PhD Student – “Transilvania” University of Brasov – Faculty of Wood Industry
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
Tel. 0040 268 412921/int.166. Fax 0040 268 415315. E-mail: myry1219@yahoo.com

Abstract:
In this paper, the authors present the results of their own research studies carried out in the laboratory phase concerning the possibility of using the water-soluble film-forming technical product type Us-V as acid-curing lacquer for the clear finishing and coloring of some solid wood panels made of resinous wood.
The film-forming product under study consists of two water-soluble amine resins produced at SC VIROMET SA Victoria at present, its curing being made possible when adding 4% of sal ammoniac as catalyst for 45 minutes at the temperature of 600C and 45 minutes at environmental temperature.

Applied through brushing in four successive layers at a specific consumption of 80g/m2/layer, directly on the panel, without previous priming and coloring, a final dry film is obtained having a thickness of 100μm, the surface thus finished being colored in a tinge of light yellow, diaphanous, half-glossed. The first layer of the film-forming product plays the role of a coloring product and also of a binding layer with the successively applied films, being thus similar to a colored primer.

From the point of view of the general technical quality requirements, stipulated in STAS 6009/1986, the clear finish thus achieved corresponds almost entirely to a normal finishing class, the film being unappropriate only at heat shock.

Key words: water-soluble carbamide lacquer, coloring, clear finish, resinous wood, solid wood panels.

* This paper was presented at the International Student Scientific Session WOOD INDUSTRY, ENVIRONMENT PROTECTION AND FORESTRY, Second Edition, which took place at the Faculty of Wood Industry, in Brasov (Romania) between the 12th-14th of May 2006. The paper was awarded with the SPECIAL AWARD of the PRO LIGNO Journal. Scientific Advisor: Prof. Dr. Eng. Valeriu PETROVICI.