The aim of the present paper was to study the effect of some particle recovery parameters on the quality of hydrothermally recycled particleboards. The research was carried out in two phases: rough evaluation of various recovery parameters and determination of the recycled particleboard properties. It was concluded that the optimum group of hydrothermal recovery parameters (among those tested in this investigation) were 45% water retention/150°C temperature/10 min duration. This conclusion relies on the below-mentioned facts: the conditions of recovery parameters 45%/150°C/10 min resulted in the lowest agglomeration ratio in the recovered material in relation to the other recovery parameters examined in the first and second phases. Concerning the properties of the recycled particleboards, it was observed that the boards that were produced utilising the above-mentioned recovery parameters showed the best internal bond, surface soundness, modulus of elasticity in bending, hygroscopic properties and free formaldehyde content values.
AlparT, HatanoY, ShibusawaT. 2007. Hydrolysis of the adhesives and reconditioning of compressed wood-cells during recycling of particleboard and fiberboard by hydrothermal process.In Gallis2007, 309–315.
2.
BoehmeC. 2003. Altholz bleibt wichtig fuer die Holzwerkstoffindustrie.Holz-Zentralblatt(4): 101.
3.
BoehmeC, MichanicklA. 1998. Process for recovering chips and fibers from residues of timber-derived materials, old pieces of furniture, production residues, waste and other timber containing materials.Patent US 5804035, EP 0697941.
4.
BratkovitschS, BowyerJ, LindburgA, FernholzK. 2009. Reclaiming lumber products from waste wood.Dovetail Partners, Inc., Minneapolis, MN, USA. Page 13.
5.
CzarneckiR, DziurkaD, ŁęckaJ. 2003. The use of recycled boards as the substitute for particles in the centre layer of particleboards. Electron.J. Polish Agric. Univ.6(2).
6.
DixB, SchaferM, RoffaelE. 2001a. Using fibers from waste fiberboards pulped by a thermo-chemical process to produce medium density fiberboard (MDF).Holz als Roh und Werkst.59(4): 276.
7.
DixB, SchaferM, RoffaelE. 2001b. Using fibers from waste particleboard and fiberboards pulped by a chemo-thermo-mechanical process to produce medium density fiberboard (MDF), Holz als Roh und Werkst.59(4): 299–300.
8.
EN 120:1992. Wood-based panels – determination of formaldehyde content. Extraction method called the perforator method.
9.
EN 13986:2004. Wood-based panels for use in construction – characteristics, evaluation of conformity and marking.
10.
EN 310:1993. Wood-based panels – determination of modulus of elasticity in bending and of bending strength.
11.
EN 311:1992. Particleboards. Surface soundness of particleboards.
12.
EN 312:2003. Particleboards – specifications.
13.
EN 317:1993. Particleboards and fibreboards – determination of swelling in thickness after immersion in water.
14.
EN 319:1993. Particleboards and fibreboards – determination of tensile strength perpendicular to the plane of the board.
15.
EN 323:1993. Wood-based panels – determination of density
JungmeierG, HolzmannM, EnzigerP, SpitzerJ. 2005. Recovered wood management in Austria – amounts, qualities, treatment, utilization.In Gallis75–93.
19.
KearleyV, BrownM, BonigutJ. 2005. Management options for treated wood waste and wood panel waste.In Gallis111–141.
20.
KearleyV, GoroyiasG. 2004. Wood panel recycling at a semi-industrial scale.Proc. 8th Panel Products Symposium. Llandudno, UK, October 2004. IPSS, BioComposites Centre - University of Wales, Bangor. Pages7–18.
21.
LykidisC, GrigoriouA. 2008. Hydrothermal recycling of waste and performance of the recycled wooden particle-boards.Waste Manag.28: 57–63.
22.
MichanicklA. 1996a. The material utilization of products made from wood-based panels.Proc. 3rd Eurowood Symposium. Braunschweig, Germany, October 1996, Wilhelm-Klauditz-Institut. Pages 1–5.
23.
MichanicklA. 1996b. Recovery of fibers and particles from wood-based products.Proc. of the use of recycled wood and paper in building applications. Madison, WI, USA, September 1996. Forest Products Society. Pages 115–119.
24.
MichanicklA, BoehmeC. 1996. Wiedergewinnung von Spänen und Fasern aus Holzwerkstoffen.Sonderdruck aus HK Holz- und Kunstoffverarbeitung4/96: 50–55.
25.
MichanicklA, BoehmeC. 2003. Method for recovering chips and fibers of bonded wood materials involves passing of steam through a vessel with such materials which have been soaked with a heated impregnation solution.Patent DE 10144793, WO 03026859.
26.
NakosP, RoffaelE. 1998. Recycling of old wood- and composite wood based particles.Proc. 2nd Panel Products Symposium. Llandudno, UK, October 1998, BioComposites Centre-University of Wales, Bangor.
27.
Pfleiderer Unternehmensverwalt. 1994. Method of recycling wood materials.Patent EP 0581039, DE 4224629.
28.
RiddioughS, KearleyV. 2001. Wood-based panels: real potential for recycling success.Proc. 5th Panel Products Symposium. Llandudno, UK, October 2001, BioComposites Centre-University of Wales, Bangor. Pages 321–327.
29.
RoffaelE, AthanassiadouE, MantanisG. 2002. Recycling of particle and fibreboards using the extruder technique. Proc. Umweltschutz in der Holzwerkstoffindustrie. Goettingen, Germany, March 2002, Georg-August-Universität Göttingen. Pages 56–65.
