Composite wood products
Mohamad Noorirad; Hedayatolah Aminian; Loya Jamalirad; Vahid Vaziri
Abstract
Background and objectives: Many studies have been conducted on the use of cellulosic resources to provide portion of raw materials for wood and paper industries. Waste branches for some species such as palm and Prosopis cineraria in southern parts of country can be a solution for deficiency of raw material ...
Read More
Background and objectives: Many studies have been conducted on the use of cellulosic resources to provide portion of raw materials for wood and paper industries. Waste branches for some species such as palm and Prosopis cineraria in southern parts of country can be a solution for deficiency of raw material in wood and paper industries. This study investigated the possibility of using a combination of Prosopis cineraria and industrial wood particles to produce particleboard with acceptable physical and mechanical properties.Methodology: The variables in this study were the ratio of Prosopis cineraria to industrial wood particles at four levels (0:100, 15:85, 30:70, 45:55) and urea formaldehyde resin at two levels (10 and 12 percent). Industrial wood particles from Sanate Choube Shomal Company and Prosopis cineraria particles were obtained from the province of Sistan and Baluchistan. Ammonium chloride as a hardener was used at 2 percent of the dry weight of the adhesive. After mixing raw material, the mat was placed under hot pressing at a temperature of 170 ˚C for 6 minutes. After the manufacture of the single-layer particleboard, the physical and mechanical properties of the boards were analyzed by a factorial test in a completely randomized design with a confidence level of 5%. Results: The results showed that the physical and mechanical properties of the panels decreased as the percentage of mixture Prosopis cineraria particles increased. So that, panels containing 45% Prosopis cineraria particles and 10% urea-formaldehyde resin had the lowest mechanical properties, while panels containing 12% urea-formaldehyde resin without Prosopis cineraria s particles had the best mechanical properties. Panels containing 45% Prosopis cineraria particles and 12% urea-formaldehyde resin had the lowest water absorption and thickness swelling, while panels containing 10% urea-formaldehyde resin without Prosopis cineraria particles had the highest.Conclusion: According to the results of this study, there was usability of boards with 15% Prosopis cineraria particles and 10% resin for Type P1 boards and the boards with 15% Prosopis cineraria particles and 12% resin for Type P2 boards.
Rahim Kazemi; Farshid Faraji; Hedayatollah Aminian; Vahid Vaziri
Abstract
In this research, the effect of adding waste tire particles on physical and mechanical properties of oriented strand boards (OSB) produced from poplar wood strands was investigated. Constant factors of this research are: Poplar wood strands (Populus deltoides), phenol formaldehyde resin ...
Read More
In this research, the effect of adding waste tire particles on physical and mechanical properties of oriented strand boards (OSB) produced from poplar wood strands was investigated. Constant factors of this research are: Poplar wood strands (Populus deltoides), phenol formaldehyde resin (8 percent for the strands and 10 percent for waste tire on dry weight basis), three layer OSB (25 percent on either top and bottom layers and 50 percent core layer), boards with a thickness of 16 mm, dimensions of 40×40 cm with a nominal density of 0.75 g/cm3.Variable factors are: mixing ratio of waste tire particles to poplar strands at the four levels of 0:100, 5:95, 10:90, 15:85 and particle size of waste tire in three different sizes of 8, 18 and 45 mesh. The physical and mechanical properties of the boards were measured as defined in relevant European standards test methods EN 300. The results showed that changes in the amount and size of waste tire particles have a significant effect on the physical and mechanical properties of OSB panels. Increasing the ratio of waste tire particles decreased the mechanical properties and inversely improved the thickness swelling of the panels. The minimum value of mechanical strength was observed in panels made of 15% waste tire particles and 45 mesh particles. In general, OSB containing waste tire particles can meet the requirements of the EN 300 standard.
Composite wood products
Alireza Beiazyat; Laya Jamalirad; Hedayat alah Aminian; Sahab Hejazi
Abstract
In this research, the effect of the wood filler content and coupling agent (MAPP) on the physical and mechanical properties of Polypropylene reinforced with palm wood flour from the annual pruning of palm leaves (Shahani species) composite, were studied. For this purpose, the palm wood flour in three ...
Read More
In this research, the effect of the wood filler content and coupling agent (MAPP) on the physical and mechanical properties of Polypropylene reinforced with palm wood flour from the annual pruning of palm leaves (Shahani species) composite, were studied. For this purpose, the palm wood flour in three levels of 30%, 40%, 50% and two levels of Maleic anhydride grafted polypropylene 4% and 6% were used as variable factors. Then, the Physical and mechanical properties of samples, including thickness swelling after 2 and 24 hours of immersion in water, bending strength, bending modulus, tensile strength, tensile modulus and impact strength, were measured.The results showed that by increasing palm wood flour, the bending strength, tensile strength and impact strength were decreased but the thickness swelling, bending modulus, tensile modulus were increased. It was also found that by adding MAPP, thickness swelling, bending strength, bending modulus, tensile strength and tensile modulus were improved. The results revealed that at increased consumption of palm wood flour and adding coupling agent leads to improve quality of the interface and significant changes especially dimensional stability and MOE, are achieved.
