ProLigno / ProLigno 2008 Issue 2  
     
 
 
   
 

 


 

 

 

STUDY CONCERNING THE INFLUENCE OF SOME FACTORS ON THE FORMALDEHYDE EMISSION OF PARTICLEBOARDS

Kinga Iudith DAVID
PhD-student - Universitatea "Transilvania" Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
Tel: +40 268 412921/int.166. Fax: +40 268 415315
E-mail:petrovic@unitbv.ro

Valeriu PETROVICI
Prof.Dr.Eng. - Universitatea "Transilvania" Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
E-mail: petrovic@unitbv.ro

Octavia ZELENIUC
Lecturer Dr.Eng. - Universitatea "Transilvania" Brasov - Facultatea de Industria Lemnului
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
E-mail: zoctavia@unitbv.ro

Lucia DUMITRESCU
Prof.Dr.Eng. - Universitatea "Transilvania" Brasov - Facultatea de Stiinta si Ingineria Materialelor
Address: B-dul Eroilor nr. 29, 500036 Brasov, Romania
E-mail: lucia.dumitrescu@gmail.com

Abstract: In this paper the authors present the results of their own researches regarding the simultaneous influence of two by two of the three important influencing factors on the formaldehyde emission of particleboards, respectively: temperature, thickness and configuration of test samples from the board pack analyzed.
The determinations were made on a new batch of particleboards having the thickness of 8, 12, 16 and 18mm under the conditions of the temperatures of 23°C, 40°C, 50°C and 60°C, taking into account seven configurations of test samples, one of them being according to the present standard in force SR EN 717-3/1996 and six others adopted as being similar to different situations that may occur in practice.
It was observed that the formaldehyde emission is influenced more by temperature than by the thickness of particleboards.
Irrespective of the board's thickness and temperature, the formaldehyde emission is unevenly distributed on the surface of the test samples pack in its different configurationally variants, and it decreases in the following range of studied configurations: VA, V, VB, VF, VD, VC and VE.
The greatest absolute formaldehyde emission was registered for a new adopted (unstandardized) configuration, VA type, when the emission takes place through all faces and edges of the boards in the pack. Thus the authors consider that this configuration should be used within the previously mentioned standard, instead of the present one.
For all the studied thicknesses and temperatures, the formaldehyde emission takes place more through the edges of particleboards than through their faces.

Key words: formaldehyde emission, flask method, particleboards.

REFERENCES
DAVID, K. I. (2006). Stadiul actual al cercetarilor privind continutul si emisia de formaldehida din produse pe baza de lemn (Present State of Researches Concerning the Formaldehyde Contents and Emmission from Woode-Based Products). Referat doctorat/Report within PhD Thesis. "Transilvania" University of Brasov.
LIGA, A.; CIUBOTARU, M.; CARANFIL, A.; NUTA, V. (1983). Diminuarea degajarii de formaldehida din placi aglomerate lemnoase. Revista Industria Lemnului, Nr. 1.
PETROVICI, V.; AGACHE, C. (2003). Aspecte si tendinte in standardizarea interna si internationala privind emisia de aldehida formica din industria lemnului (Aspects and Trends in Internal and International Standardization Regarding the Formaldehyde Emmission in Wood Industry). In: Proceedings of National Conference "Wood Science and Engineering in the Third Millenium", Brasov-Romania, November 2003, pp. 53-71.
PETROVICI, V.; NEMET, C.; DAVID, K.I.; URDEA, S.N. (2005). Unele concepte europene in standardele nationale actuale privind calitatea mediului inconjurator (Some European Concepts in Present National Standards Regarding the Quality of Environment). In: Proceedings of National Conference "Wood Science and Engineering in the Third Millenium", Brasov-Romania, November 2005, pp. 141-148
PETROVICI, V.; URDEA, S.N.; DAVID, K.I.; PIRNUTA, O. A. (2006a). Cercetari privind emisia de formaldehida a placilor din aschii de lemn prin metoda flaconului, in conditii standard si unele variante modificate ale configuratiei placilor din pachet. Partea 1. Metodologie (Research Concerning the Formaldehyde Emmission of Particleboards Through the Flask Method under Standard Conditions and Some Modified Variants of the Board Pack Configuration. Part 1. Methodology). PRO LIGNO Journal 2(1):19-29).
PETROVICI, V.; URDEA, S.N.; DAVID, K.I.; PIRNUTA, O. A. (2006b). Cercetari privind emisia de forma aldehida a placilor din aschii de lemn prin metoda flaconului, in conditii standard si unele variante modificate ale configuratiei placilor din pachet. Partea 2-a. Rezultate experimentale (Research Concerning the Formaldehyde Emmission of Particleboards Through the Flask Method under Standard Conditions and Some Modified Variants of the Board Pack Configuration. Part 2. Experimental Results). PRO LIGNO Journal 2(2): 31-46.
URDEA, S.N. (2006). Raport privind stadiul actual al cercetarilor in domeniul emisiei de formaldehida din placi stratificate din lemn (Report Concerning the Present State of Researches in the Field of Formaldehyde Emmission from Laminated Wooden Panels). Referat doctorat/Report within PhD Thesis "Transilvania" University of Brasov.
WALKER, J.F. (1962). Formaldehyde. Third Edition. American Chemical Society, New York, Reinhold Publishing Corporation.

 

 

 
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