Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 20 No., 1 2005 05 22 THE EFFECT OF PRODUCTION VARIABLES ON MEDIUM DENSITY FIBERBOARD QUALITY MADE FROM TALABE -ANZALYE REED THE EFFECT OF PRODUCTION VARIABLES ON MEDIUM DENSITY FIBERBOARD QUALITY MADE FROM TALABE -ANZALYE REED 1 22 117573 10.22092/ijwpr.2005.117573 FA Masoudreza Habibi Wood and Paper Science Research Division, Research Institute of Forests and Rangelands , Iran, Saeed Mahdavi Ph.D., Wood and Paper Science Research Division, Research Institute of Forests and Rangelands , Iran, Hossein Hosseinkhani Wood Science & Forest Products Research Division Research Institute of Forests & Rangelands Tehran, Iran Journal Article 2018 10 23 In this study, MDF was produced from Reed ( Phragmites australis ). Reeds are collected from Talabe - Anzalye areas. The treatments conditions for fiber preparing were as follows: -Steaming temperature 170°c, 180°c -Steaming time 5, 10, 15 minutes The other production variables were constant. The anatomical properties of Reed such as fiber length, fiber diameter, lumen cell diameter, and cell wall thickness were measured respectively 1.38mm, 17.07, 6.15, 5.46 micron. LID ratio of Reed fiber was measured 80.84. The physical and mechanical properties of MDF were determined according to DIN standard. The measurements of bending properties and IB of MDF revealed that increasing steaming time and steaming temperature caused to decrease MOR, MOE and IB. Also the results of MDF dimentional stabilities indicated that Thickness Swelling after 2 and 24 hours decreased upon increasing steaming time and steaming temperature. Degradation of hemicellulose chains may be the reason of decreasing Thickness Swelling. In this study, MDF was produced from Reed ( Phragmites australis ). Reeds are collected from Talabe - Anzalye areas. The treatments conditions for fiber preparing were as follows: -Steaming temperature 170°c, 180°c -Steaming time 5, 10, 15 minutes The other production variables were constant. The anatomical properties of Reed such as fiber length, fiber diameter, lumen cell diameter, and cell wall thickness were measured respectively 1.38mm, 17.07, 6.15, 5.46 micron. LID ratio of Reed fiber was measured 80.84. The physical and mechanical properties of MDF were determined according to DIN standard. The measurements of bending properties and IB of MDF revealed that increasing steaming time and steaming temperature caused to decrease MOR, MOE and IB. Also the results of MDF dimentional stabilities indicated that Thickness Swelling after 2 and 24 hours decreased upon increasing steaming time and steaming temperature. Degradation of hemicellulose chains may be the reason of decreasing Thickness Swelling.

https://ijwpr.areeo.ac.ir/article_117573_a68148db91228890625cadde5572852f.pdf

Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 20 No., 1 2005 05 22 SAWING PATTERN FOR POPLAR WOOD (POPULUS NIGRA) SAWING PATTERN FOR POPLAR WOOD (POPULUS NIGRA) 23 46 117574 10.22092/ijwpr.2005.117574 FA Hossein Hosseinkhani Wood Science & Forest Products Research Division Research Institute of Forests & Rangelands Tehran, Iran Abdolrahman Hosseinzadeh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Resear Fardad Golbabaei Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran Abbas Fakhryan Roghani MSc., Wood and Paper Science Research Division, Research Institute of Forests and Rangelands , Iran, Masoudreza Habibi Wood and Paper Science Research Division, Research Institute of Forests and Rangelands , Iran, Journal Article 2018 10 23 In order to establish a sawing pattern for small log of Iranian Poplar wood (Populus nigra), experimental specimens were prepared from fresh felled trees. All logs were cut in 230 cm, the length and two sawing patterns were used in order to saw and produce boards with 60 mm, nominal size in thickness. In this study the band saw both vertical and horizontal were used. The study provides considerable evidence that there is significant difference between two sawing patterns (live & traditional method) and live sawing gave significantly more yield and slabs than the other method Sawing pattern for each top diameter of logs have been also given. Since the cost of coating is not much in relation to the benefits, end coating of logs and storage is recommended. In order to establish a sawing pattern for small log of Iranian Poplar wood (Populus nigra), experimental specimens were prepared from fresh felled trees. All logs were cut in 230 cm, the length and two sawing patterns were used in order to saw and produce boards with 60 mm, nominal size in thickness. In this study the band saw both vertical and horizontal were used. The study provides considerable evidence that there is significant difference between two sawing patterns (live & traditional method) and live sawing gave significantly more yield and slabs than the other method Sawing pattern for each top diameter of logs have been also given. Since the cost of coating is not much in relation to the benefits, end coating of logs and storage is recommended.

https://ijwpr.areeo.ac.ir/article_117574_c38a25783e68755f8ebf35a0ec6580d0.pdf

Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 20 No., 1 2005 05 22 THE EFFECT OF RESIN CONTENT AND PRESS TIME ON PROPERTIES OF PARTICLEBOARD PRODUCTION FROM SOUTHERN LIGNOCELLULOSIC MATERIALS IN IRAN THE EFFECT OF RESIN CONTENT AND PRESS TIME ON PROPERTIES OF PARTICLEBOARD PRODUCTION FROM SOUTHERN LIGNOCELLULOSIC MATERIALS IN IRAN 47 64 117575 10.22092/ijwpr.2005.117575 FA Amir Nourbakhsh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran Abolfazl Kargarfard Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Tehran, Iran, Journal Article 2018 10 23 In this study the effect of resin content and press time of particleboard from Date palm residues, Eucalyptus camaldulensis, Tamarix residues and prosopis (Mesquite) producted were investigated in southern of Iran. Variable factors as resin content (9, 10 and 11 percent) and press time (5, 6 and 7 minutes) and total of 27 boards were fabricated. Other factors such as type of resin (UF), hardener content (2 percent) type of hardener (NH4Cl) press closing time (4.5 mm/sec.), board density (0.7 gr/cm3) press pressure (30 kg/cm2) and press temperature (160 °C)were held constant. All boards were tested according to DIN-68763 standard. The factorial experimental design at completely random test was used. The results of this study could be summarized as follows: Increasing the resin content from 9 to 11 percent, MOE and IE and decreased thickness swelling after two and 24 hours immersion in water. The results revealed that the polymerization of resin and wood is better at 11 percentresincontentand6 minutes of press time. In this study the effect of resin content and press time of particleboard from Date palm residues, Eucalyptus camaldulensis, Tamarix residues and prosopis (Mesquite) producted were investigated in southern of Iran. Variable factors as resin content (9, 10 and 11 percent) and press time (5, 6 and 7 minutes) and total of 27 boards were fabricated. Other factors such as type of resin (UF), hardener content (2 percent) type of hardener (NH4Cl) press closing time (4.5 mm/sec.), board density (0.7 gr/cm3) press pressure (30 kg/cm2) and press temperature (160 °C)were held constant. All boards were tested according to DIN-68763 standard. The factorial experimental design at completely random test was used. The results of this study could be summarized as follows: Increasing the resin content from 9 to 11 percent, MOE and IE and decreased thickness swelling after two and 24 hours immersion in water. The results revealed that the polymerization of resin and wood is better at 11 percentresincontentand6 minutes of press time.

https://ijwpr.areeo.ac.ir/article_117575_37bc29dfdb8217806bcd9f3998c1d6fd.pdf

Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 20 No., 1 2005 05 22 DETERMINATION OF PRACTICAL PROPERTIES OF ALNUS GLUTINOSA GROWN AT SHORT ROTATION PERIOD IN PAPER MAKING DETERMINATION OF PRACTICAL PROPERTIES OF ALNUS GLUTINOSA GROWN AT SHORT ROTATION PERIOD IN PAPER MAKING 65 94 117576 10.22092/ijwpr.2005.117576 FA Abbas Fakhryan Roghani MSc., Wood and Paper Science Research Division, Research Institute of Forests and Rangelands , Iran, Abdolrahman Hosseinzadeh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Resear Fardad Golbabaei Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran Journal Article 2018 10 23 In this investigation, physical, chemical, fiber dimensions, pulp and papermaking characteristics of 4 years old Alnus glutinosa was researched. The average of oven dry and critical density, fiber length, fiber diameter, lumen diameter and cell wall thickness were measured at 0.396, 0.368, 0.875mm, 32.66um, 27.28 urn and 2.70 urn respectively. Chemical compositions were obtained 48.5% cellulose, 25.35% lignin, 0.31% ash and 2.36% extractives. CMP, one stage APMP and two stage APMP processes were used for cooking. After preliminary cooking, cooking temperature, cooking time, NaOH and H202 charges were applied at 95 degree of centigrade, 10, 20, 30 and 40 minutes 10%,3% and so on. In CMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %73.72-%82.57, Kpa m2/gr. 1.53, Km 3.81, mNm2/gr 3.34, %99.59 and %29.35 correspondingly. In one stage APMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %74.09-%81.57, Kpa m2/gr. 1.52, Km 3.5, mNm2/gr3.2, %99.80 and%28.21 respectively. In two stage APMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %73.99-%80.89, Kpa m2/gr. 1.92, Km 3.95, mNm2/gr 3.45, %99.85 and %32.41 in that order. Among yields of pulp in the three methods, there weren't significant difference at level 5%. In two stages APMP paper, the burst index, breaking length and brightness were more than other and changes of cooking methods hadn't significant differences at level 5% on tear index. In this investigation, physical, chemical, fiber dimensions, pulp and papermaking characteristics of 4 years old Alnus glutinosa was researched. The average of oven dry and critical density, fiber length, fiber diameter, lumen diameter and cell wall thickness were measured at 0.396, 0.368, 0.875mm, 32.66um, 27.28 urn and 2.70 urn respectively. Chemical compositions were obtained 48.5% cellulose, 25.35% lignin, 0.31% ash and 2.36% extractives. CMP, one stage APMP and two stage APMP processes were used for cooking. After preliminary cooking, cooking temperature, cooking time, NaOH and H202 charges were applied at 95 degree of centigrade, 10, 20, 30 and 40 minutes 10%,3% and so on. In CMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %73.72-%82.57, Kpa m2/gr. 1.53, Km 3.81, mNm2/gr 3.34, %99.59 and %29.35 correspondingly. In one stage APMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %74.09-%81.57, Kpa m2/gr. 1.52, Km 3.5, mNm2/gr3.2, %99.80 and%28.21 respectively. In two stage APMP process, the average of yield, burst index, breaking length, tear index opacity and brightness were obtained at %73.99-%80.89, Kpa m2/gr. 1.92, Km 3.95, mNm2/gr 3.45, %99.85 and %32.41 in that order. Among yields of pulp in the three methods, there weren't significant difference at level 5%. In two stages APMP paper, the burst index, breaking length and brightness were more than other and changes of cooking methods hadn't significant differences at level 5% on tear index.

https://ijwpr.areeo.ac.ir/article_117576_80b523aa9789d1791eb9eb82bac95090.pdf

Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 20 No., 1 2005 05 22 THE EFFECT OF MAT MOISTURE CONTENT GRADIENT ON PHYSICAL & MECHANICAL PROPERTIES OF PARTICLEBOARD THE EFFECT OF MAT MOISTURE CONTENT GRADIENT ON PHYSICAL & MECHANICAL PROPERTIES OF PARTICLEBOARD 95 110 117577 10.22092/ijwpr.2005.117577 FA Abolfazl Kargarfard Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Tehran, Iran, Abdolrahman Hosseinzadeh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Resear Kazem Doosthosseini Wood and paper science and technology department, of natural Resources faculty, university of Tehran. IRAN Ahmad Jahan Latibari Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran Amir Nourbakhsh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran Journal Article 2018 10 23 In this investigation, experimental boards were produced using beech wood particle, mat moisture content gradient at 0,3 and 6%, two press temperature sat 165and 1850 C and two press times at 3 and 5 minutes. 36 sample boards produced and the physical and mechanical properties of those tested. The results indicated that mat moisture content gradient had significantly effected on modified of modulus of elasticity of boards, and with increasing mat moisture content gradient, the MOE of boards increased. Also in 0% mat moisture content gradient, increasing of press time, modulus of rupture and modulus of elasticity decreased. However with increasing mat moisture content gradient, increasing of press time caused of these properties modified. On the other hand an inverse relationship observed between mat moisture content gradient and internal bond of boards that due to of negative effect of increasing of vapor pressure were on resin bond quality in middle layer. But with increasing press time from 3 to 5 minutes, the internal bond of boards increased. The results of thickness swelling measurement indicated that with increasing mat moisture content gradient, the thickness swelling of boards increased. However, when press time increased, the thickness swelling of boards decreased. In this investigation, experimental boards were produced using beech wood particle, mat moisture content gradient at 0,3 and 6%, two press temperature sat 165and 1850 C and two press times at 3 and 5 minutes. 36 sample boards produced and the physical and mechanical properties of those tested. The results indicated that mat moisture content gradient had significantly effected on modified of modulus of elasticity of boards, and with increasing mat moisture content gradient, the MOE of boards increased. Also in 0% mat moisture content gradient, increasing of press time, modulus of rupture and modulus of elasticity decreased. However with increasing mat moisture content gradient, increasing of press time caused of these properties modified. On the other hand an inverse relationship observed between mat moisture content gradient and internal bond of boards that due to of negative effect of increasing of vapor pressure were on resin bond quality in middle layer. But with increasing press time from 3 to 5 minutes, the internal bond of boards increased. The results of thickness swelling measurement indicated that with increasing mat moisture content gradient, the thickness swelling of boards increased. However, when press time increased, the thickness swelling of boards decreased.

https://ijwpr.areeo.ac.ir/article_117577_16307aa050394aa16f580a4870f0b6bd.pdf

Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 20 No., 1 2005 05 22 UTILIZATION OF BEECH SLABS RESIDUES IN PARTICLEBOARDS PRODUCTION UTILIZATION OF BEECH SLABS RESIDUES IN PARTICLEBOARDS PRODUCTION 111 132 117578 10.22092/ijwpr.2005.117578 FA Amir Nourbakhsh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran Abdolrahman Hosseinzadeh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Resear Kazem Doosthosseini Wood and paper science and technology department, of natural Resources faculty, university of Tehran. IRAN Abolfazl Kargarfard Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Tehran, Iran, Mazyar Radkyan Islamic Azad University, Karaj, Iran Journal Article 2018 10 23 In this investigation feasibility of Beech slabs in particleboards production were prepared at three different contents resin of 9, 10, and 11 percent, press temperatures of 165°C and 175°C and hardener contents of 1.5 and 2.5 percent. Based on the DIN-68763 standard physical and mechanical properties including MOR, MOE, IB, and thickness swelling (after 2 and 24 immersion in water) were tested. According to the factorial experimental design at completely random test was analysis. The potential utilization of Beech slabs residues in particleboard production including: resin content (11%), press time (6 min.), press temp. (175°C), and hardener contents (2.5%) were found. In this investigation feasibility of Beech slabs in particleboards production were prepared at three different contents resin of 9, 10, and 11 percent, press temperatures of 165°C and 175°C and hardener contents of 1.5 and 2.5 percent. Based on the DIN-68763 standard physical and mechanical properties including MOR, MOE, IB, and thickness swelling (after 2 and 24 immersion in water) were tested. According to the factorial experimental design at completely random test was analysis. The potential utilization of Beech slabs residues in particleboard production including: resin content (11%), press time (6 min.), press temp. (175°C), and hardener contents (2.5%) were found.

https://ijwpr.areeo.ac.ir/article_117578_1d3f8c3270b49399ce92998c0b3fdceb.pdf

Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 20 No., 1 2005 05 22 INVESTIGATION ON DURABILITY OF EUCALYPTUS WOOD (E. INTERTEXTA R.T.BAKER) AGAINST TRAMETES VERSICOLOR L.EX INVESTIGATION ON DURABILITY OF EUCALYPTUS WOOD (E. INTERTEXTA R.T.BAKER) AGAINST TRAMETES VERSICOLOR L.EX 133 142 117579 10.22092/ijwpr.2005.117579 FA Habib Alah Arab Tabar Firoz Jaei Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran Ali Reza Nezhad Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran Abdolrahman Hosseinzadeh Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Resear Journal Article 2018 10 23 In this study, durability of Eucalyptus wood(Eucalyptus intertexta R.T.Baker) in both treated with creosote and celcore and untreated to attack by Trametes versicolor (L.ex)L loyd. were evaluated heart wood by the Kolleshal methodes described in DIN 52176, and B.S. 838. The comparison of weight losses of samples were also evaluated and it showed that fungus had no effect on the treated samples but it caused 4% weight loss of natural durability samples. Based on this study, it can be concluded that E. intertexta wood can be classified as a durable wood. In this study, durability of Eucalyptus wood(Eucalyptus intertexta R.T.Baker) in both treated with creosote and celcore and untreated to attack by Trametes versicolor (L.ex)L loyd. were evaluated heart wood by the Kolleshal methodes described in DIN 52176, and B.S. 838. The comparison of weight losses of samples were also evaluated and it showed that fungus had no effect on the treated samples but it caused 4% weight loss of natural durability samples. Based on this study, it can be concluded that E. intertexta wood can be classified as a durable wood. https://ijwpr.areeo.ac.ir/article_117579_9c1f8c6ec2a6e08ac9c89eb103d39187.pdf