Aim of study: The objectives of this research were to determine the effectiveness of melamine impregnated paper (MIP) waste as an adhesive in the particleboard manufacturing and effects of the MIP waste using as an adhesive on the some technological properties of particleboard.Area of study: To determine the mechanical, physical and formaldehyde content of particleboards manufactured with different resins (MIP waste, neat MIP resin).Material and Methods: In this study, particleboards were produced with utilizing MIP waste and neat MIP resin. No additional adhesive was used for MIP waste. Two different types of mixture of Turkish red pine (90%) and poplar wood (10%) particles (fine and coarse) were used. Eight different particleboard groups and three particleboards with three layers (two surface layers and one core layer) were manufactured for each group in hot press. Main results: As results of this study, amount of adhesives had significant effect on panel properties. With the increasing of both adhesive rates (MIPW and neat MIP resin), mechanical and physical properties of particleboard were improved. However, formaldehyde content values were worsen with the increasing of both adhesive rates. The best result for MIPW and neat MIP resin were obtained when highest rates of them (25% and 13%, respectively) were used.Research highlights: Particleboards were successfully manufactured with using of the MIP waste as adhesive. Although the MIPW (25%) boards were provided lower mechanical and physical values than neat MIP resin (13%) boards, they were satisfied the most of standard requirements.Keywords: Melamine impregnated paper waste, neat MIP resin, urea formaldehyde and melamine formaldehyde, mechanical, physical and formaldehyde content of particleboards. Yongalevha Üretiminde Melamin Emprenye Kağıt Atıklarının Tutkal Olarak Etkinliği ÖzÇalışmanın amacı: Yongalevha üretiminde melamin emdirilmiş kağıt (MEK) atıklarının tutkal olarak etkinliğinin ve MEK atıklarının tutkal olarak kullanılmasının yongalevhaların bazı teknolojik özellikleri üzerinde ki etkilerinin belirlenmesi amaçlanmıştır.Çalışma alanı: MEK atıkları ve saf MEK tutkalı kullanılarak üretilen yongalevhaların mekanik, fiziksel ve formaldehit emisyonu özelliklerinin belirlenmesidir.Materyal ve Yöntem: Bu çalışmada MEK atıkları ve saf MEK reçinesi yongalevha üretiminde tutkal olarak kullanılmıştır. MEK atıklarına ilave olarak tutkal kullanılmamıştır. İki farklı tipte (kaba ve ince) kızılçam (%90) ve kavak (%10) yonga karışımları kullanılmıştır. 8 farklı yongalevha grubu oluşturulmuştur. Her bir grup için 3 tabakalı (iki yüzey ve bir orta tabaka) 3 adet yongalevha tam otomatik sıcak pres kullanılarak üretilmiştir.Sonuçlar: Çalışmanın sonucu olarak, tutkal miktarının yongalevha özellikleri üzerinde önemli derecede etkili olduğu belirlenmiştir. Her iki tutkal miktarının (MEK atıkları ve saf MEK reçinesi) artması ile mekanik ve fiziksel özelliklerinin iyileştiği, bunun yanı sıra formaldehit emisyon değerlerinin ise kötüleştiği belirlenmiştir. En iyi sonuçlar M...
Many tropical tree species are used in the production of furniture, exterior coatings and garden furniture in our country. Dahoma (Piptadeniastrum africanum) timber, considered a tropical tree species, is used extensively as flooring in the interior of vehicles and containers, as wooden flooring on truck floors, as flooring on industrial or heavily used floors, as flooring on docks and piers, in interior staircase construction, and in the construction of furniture components. In this study, the effects of the usage of waste Dahoma wood flour from the profiling machine as a filler in the production of Polypropylene (PP) based wood plastic composites on the mechanical and morphological properties of composite materials were investigated. Waste wood flour was used as received from the plant and in four different ratios (0%, 15%, 30% and 45%). Dimensional analysis of waste wood flours was carried out. Maleic anhydride polypropylene (MAPP) (3%) was used as a coupling agent and Paraffin Wax (3%) was used as the lubricant. In the light of the results, although slight fluctuations were observed in the tensile and impact strength values with the addition of wood flour, improvements were determined in the mechanical values in general. Tensile modulus, flexural strength and flexural modulus of the composites were improved with the increase of wood flour loading ratio. A sharp decrease was observed in the elongation at break values. When the morphological properties were examined, it was observed that the wood flours were homogeneously dispersed in the polymer matrix, the polymer matrix wrapped firmly around the RPF fibres and it shows that the interface interaction is nevertheless robust even after the fracture of samples. As a result, it was concluded that waste Dahoma wood flours might be evaluated in the production of wood-plastic composites.
The objective of this study was to investigate the utilization of waste tea wood fibers (WTWF) and effect of maleic anhydride treated polyethylene (MAPE) in thermoplastic composites. For this purpose, HDPE as matrix, WTWF as lignocellulosic filler and MAPE as coupling agent were used. Six different composites were produced by injection molding method; 0-15-30% WTWF filler ratio, with MAPE and without MAPE. The physical, mechanical, thermal and morphological properties of composite materials were determined. As a result, tensile strength, tensile modulus, flexural strength and flexural modulus of the composites were increased with the rise of the WTWF amount in the thermoplastic matrix. However, WTWF increase in the thermoplastic matrix reduced the elongation at break and impact strength of the produced composites. Addition of MAPE in thermoplastic matrix improved tensile strength, flexural strength and flexural modulus of manufactured composites. In the case of thermal properties, addition of WTWF into the thermoplastic matrix increased the char rate of the composites. However, the initial degradation did not change. It appears that waste tea wood fibers may have a potential usage as filler in the HDPE-based thermoplastic composites.
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