Production Process and Nondestructive Testing of Soybean Stalks Particleboard

2012 ◽  
Vol 430-432 ◽  
pp. 1339-1342
Author(s):  
Wei Lu ◽  
Jia Yao ◽  
Ping Han ◽  
Wan Jiang Wu ◽  
Chuang Liu
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Time Distribution ◽  
Process Analysis ◽  
Orthogonal Experiment ◽  
Flexural Vibration ◽  
Modulus Of Rupture ◽  
Process Conditions ◽  
Pressing Temperature ◽  
Pressing Time

Orthogonal experiment of four factor and three level has been adopted, through the process analysis of the various factors on mechanical properties, the best process conditions of soybean stalks particleboard are chosen as: density is 0.7g/cm3, glue content is 12%, and hot pressing time distribution is 3+4 minutes, hot pressing temperature is 175°C. The Ef (the dynamic elastic modulus of NDT) of soybean stalks particleboard has been examined by flexural vibration method of FFT(Fast Fourier Transform), the regression between Ef and MOE(modulus of elasticity), MOR(modulus of rupture) is significant and existing high relevance degree, so using FFT method for NDT of composite materials is feasible.

Study on the Technology and Properties of Soybean Adhesive Bonded Laminated Veneer Lumber from Poplar Wood

2012 ◽  
Vol 174-177 ◽  
pp. 847-851
Author(s):  
Wen Ding Li ◽  
Yang Zhang ◽  
Cong Liu ◽  
Kien Nguyentrong ◽  
Chong Jia
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Modulus Of Rupture ◽  
Poplar Wood ◽  
Horizontal Shear ◽  
Pressing Temperature ◽  
Laminated Veneer Lumber ◽  
Pressing Time ◽  
Mechanical And Physical Properties ◽  
The Mean

It was investigated that the technology of hot prepressing temperature and hot pressing duration had influence on the mechanical and physical properties of soybean adhesive bonded laminated veneer lumber(LVL) from poplar wood. The results show that lower mat prepressing temperature may be beneficial to the mechanical properties of LVL. The effects of hot pressing duration on the properties of LVL are less than those of prepressing temperature. When the prepressing temperature is 70°C and hot pressing time is 100s/mm with glue spread amount of 450g/m2, hot pressing temperature of 160°C and mat pressure of 1.6 MPa, the mean modulus of rupture value is 78 MPa, mean modulus of elasticity value is 14.4 GPa, mean horizontal shear strength value is 7.8 MPa and immersion peel rate is 0.4%, respectively.

Study on Preparation and Properties of Recycled Plastic-Poplar Plywood

2011 ◽  
Vol 121-126 ◽  
pp. 2917-2921
Author(s):  
Fang Zhao ◽  
Kun Lin Song ◽  
Wei Gao ◽  
Shuang Bao Zhang
Keyword(s):  
Hot Pressing ◽  
Bonding Strength ◽  
Formaldehyde Emission ◽  
Optimum Process ◽  
Process Conditions ◽  
Plastic Film ◽  
Pressing Temperature ◽  
Pressing Time ◽  
Recycled Plastics ◽  
Peak Value

In this paper, traditional adhesives were replaced by recycled plastics to make poplar plywood by hot-pressing. The results showed that the amount of recycled plastics made no obvious effects on the bonding strength, and the dry bonding strength reached the maximum with the amount of plastic film of 100g/m2. When the hot temperature was 150°C, the bonding strength no longer increased with the temperature, or even decreased. When the pressing time was 5 minutes, the bonding strength achieved the peak value, and then declined along with the extending of time. After testing, formaldehyde emission was found to be very low or zero. The new plywood is a kind of green and environmentally friendly wood-based panels. Above all, it could be concluded that the amount of plastic film of 100g/m2, the hot pressing temperature of 150°C and the hot pressing time of 5 minutes were the optimum process conditions in this experiment.

Manufacturer Technology of Dense Chinese Fir Laminated Veneer Lumber (LVL)

2012 ◽  
Vol 542-543 ◽  
pp. 363-366
Author(s):  
Chi Qiang Yao ◽  
Li Yu ◽  
Yan Jun Li ◽  
Shi Ke Xu ◽  
Lan Xing Du
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Phenol Formaldehyde ◽  
Chinese Fir ◽  
Water Soluble ◽  
Technological Parameters ◽  
Pressing Temperature ◽  
Laminated Veneer Lumber ◽  
Pressing Time ◽  
Processing Factors

Dense Chinese Fir LVL was manufactured from Chinese Fir veneer which was impregnated with laboratory prepared water soluble phenol formaldehyde(PF) resin. The influences of various processing factors on properties of dense Chinese Fir LVL were explored. It is showed that the mechanical properties of dense Chinese Fir LVL first increase and then decrease with the increase of drying temperature and hot-pressing time. Plank performance becomes higher with the increase of compressibility and hot-pressing temperature. The optimum technological parameters for LVL process are set.

Fabrication and Mechanical Properties Analysis of Flame-Retardant Fiberboards Made of Abandoned Flax Fibers and Polyurethanes

2012 ◽  
Vol 627 ◽  
pp. 892-895 ◽  
Author(s):  
Li Hua Lv ◽  
Min Zuo ◽  
Chun Yan Wei ◽  
Xiao Wang ◽  
Ke Wang
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Hot Pressing ◽  
Mass Fraction ◽  
Bending Strength ◽  
Range Analysis ◽  
Pressing Temperature ◽  
Limiting Oxygen Index ◽  
Flax Fibers ◽  
Pressing Time

In this paper, abandoned flax fibers were adopted as reinforcing materials, polyurethane particles were adopted as matrix materials. Through blend mastication and hot-pressing methods to exploit flame-retardant fiberboards, which were made of abandoned flax fibers and polyurethanes. This paper explored the mechanical properties and flame-retardant property.Tensile strength, bending strength and impact strength were selected as mechanical properties' test index, limiting oxygen index was selected as flame-retardant property's test index. Abandoned flax fibers mass fraction, hot-pressing temperature, hot-pressing time and flame-retardant mass fraction acted as level of factor. The optimized processing conditions were concluded through orthogonal experiment and the range analysis: abandoned flax fibers mass fraction 45%, hot-pressing temperature 170°C, hot-pressing time 6 min, flame-retardant mass fraction 10%. This paper studied the solution of the abandoned fibers’ reuse. At the same time, it provided theoretical guidance for the further development of flame- retardant polyurethane fiberboard.

Properties of Particleboard Manufactured with Modified Urea-Formaldehyde Resin

2010 ◽  
Vol 150-151 ◽  
pp. 1135-1138
Author(s):  
Ji Zhi Zhang ◽  
Jian Zhang Li ◽  
Shi Feng Zhang
Keyword(s):  
Hot Pressing ◽  
Urea Formaldehyde ◽  
Formaldehyde Emission ◽  
Modulus Of Rupture ◽  
Formaldehyde Resin ◽  
Pressing Temperature ◽  
Technical Parameters ◽  
Pressing Time ◽  
Uf Resin ◽  
Modified Urea

This study modified urea-formaldehyde (UF) resin with a modifier, and focused on properties of particleboard manufactured with the modified UF resin. The orthogonal design was used to analyze the effects of different levels of hot-pressing temperature, hot-pressing time, glue content, and waterproof agent content on the modulus of rupture (MOR), internal bonding strength (IB), and formaldehyde emission (FE) of the particleboard, and thus determined the optimum technical parameters of hot-pressing. The conclusions were as follows: (1) the modifier used in this study could significantly reduce the free formaldehyde content of UF resin and the formaldehyde emission of particleboard; (2) the optimum hot-pressing technical parameters of particleboard manufactured with the modified UF resin were hot-pressing temperature 180°C, hot-pressing time 50s/mm, glue content 12%, and waterproof agent content 0.6%. The MOR and IB under the optimum technical parameters could reach 20.7 and 0.47 MPa, and the FE was 0.85 mg/L.

The Property Research of Eco-Friendly Packaging Materials Prepared by Sunflower Stalk Core

2010 ◽  
Vol 113-116 ◽  
pp. 1379-1382
Author(s):  
Jun You Shi ◽  
Yang Xing
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Orthogonal Experiment ◽  
Raw Material ◽  
Packaging Materials ◽  
Biodegradable Packaging ◽  
Pressing Time

In this paper, the pith of sunflowers was used to be the main raw material. Therefore, the properties of the biodegradable packaging materials were studied. The quantity of starch and density of PVA were changed under the condition of 20% content of PVA, the hot-pressing time for 15min and the pressure of 1.19Mpa. The orthogonal experiment was made under the above conditions. It got the conclusion that the thickness of the plank is 1.65 mm. Its density is 0.80 g/cm3. According to GB/T12941-2008 and GB/T 2679.7-2006, the mechanical properties of the material meet the relevant standards.

Process and Mechanical Properties of Basalt Fiber/Polylactic Acid Composites

2012 ◽  
Vol 193-194 ◽  
pp. 329-332 ◽  
Author(s):  
Li Hua Lv ◽  
Gui Bin Liu ◽  
Dan Zhou
Keyword(s):  
Mechanical Properties ◽  
Polylactic Acid ◽  
Hot Pressing ◽  
Mass Fraction ◽  
Bending Strength ◽  
Matrix Material ◽  
Basalt Fiber ◽  
Pressing Pressure ◽  
Pressing Temperature ◽  
Pressing Time

In this paper, the basalt fiber/polylactic acid composites were prepared by laying-up hot-pressing process, using PLA sheet as the matrix material and basalt fiber fabrics as the reinforced material, besides, the mechanical properties were studied and the parameters of hot-pressing were optimized. PLA mass fraction, heat pressing temperature, heat pressing pressure and heat pressing time were selected as the four main influence factors and tensile strength and bending strength were taken as the test indexes, the best processing conditions: PLA mass fraction 63%, Heat pressing temperature 195 °C, Heat pressing pressure 7MPa, Heat pressing time 10min were optimized through orthogonal experiment and range analysis. The significance of the study was providing theoretical guidance for the further development of high-performance basalt fiber composites.

Investigation of Formaldehyde-Free Soybean Meal-Based Adhesive Applying on Particleboard

2010 ◽  
Vol 113-116 ◽  
pp. 2085-2089
Author(s):  
Qiang Gao ◽  
Yao Hui Dong ◽  
Shi Feng Zhang ◽  
Jian Zhang Li
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Thermal Behavior ◽  
Soybean Meal ◽  
Hot Pressing ◽  
National Standards ◽  
Pressing Temperature ◽  
Technical Parameters ◽  
Pressing Time ◽  
Environmental Friendly

For manufacturing high mechanical properties and environmental-friendly particleboard, a formaldehyde-free soybean meal (SM)-based adhesive was developed and applied in the mechanical manufacture of particleboard. The thermal behavior of the adhesive was investigated and the properties of the particleboard were tested according to Chinese Standards methods. The results show that the optimum technical parameters were: hot-pressing temperature was 180 °C, hot-pressing time was 65 s/mm, moisture content was 12 %, and glue content was 15 %. The MOR and IB of particleboard were 20.6 MPa and 0.59 MPa respectively. It fully fits the Chinese National Standards GBT 4897.5-2003. Therefore, it is a practical way for manufacturing environmental friendly particleboard by SM-based adhesive.

Predictive Models for Modulus of Rupture and Modulus of Elasticity of Particleboard Manufactured in Different Pressing Conditions

2017 ◽  
Vol 36 (6) ◽  
pp. 623-634 ◽  
Author(s):  
Sebahattin Tiryaki ◽  
Uğur Aras ◽  
Hülya Kalaycıoğlu ◽  
Emir Erişir ◽  
Aytaç Aydın
Keyword(s):  
Mechanical Properties ◽  
Predictive Models ◽  
Modulus Of Elasticity ◽  
The Other ◽  
Modulus Of Rupture ◽  
Pressing Pressure ◽  
Pressing Temperature ◽  
Pressing Time ◽  
Artificial Neural Network Ann ◽  
Temperature Time

AbstractDetermining the mechanical properties of particleboard has gained a great importance due to its increasing usage as a building material in recent years. This study aims to develop artificial neural network (ANN) and multiple linear regression (MLR) models for predicting modulus of rupture (MOR) and modulus of elasticity (MOE) of particleboard depending on different pressing temperature, pressing time, pressing pressure and resin type. Experimental results indicated that the increased pressing temperature, time and pressure in manufacturing process generally improved the mechanical properties of particleboard. It was also seen that ANN and MLR models were highly successful in predicting the MOR and MOE of particleboard under given conditions. On the other hand, a comparison between ANN and MLR revealed that the ANN was superior compared to the MLR in predicting the MOR and MOE. Finally, the findings of this study are expected to provide beneficial insights for practitioners to better understand usability of such composite materials for engineering applications and to better assess the effects of pressing conditions on the MOR and MOE of particleboard.

scholarly journals Fabrication of (SiC-AlN)/ZrB2 Composite with Nano-Micron Hybrid Microstructure via PCS-Derived Ceramics Route

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 334
Author(s):  
Aidong Xia ◽  
Jie Yin ◽  
Xiao Chen ◽  
Zhengren Huang ◽  
Xuejian Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Flexural Strength ◽  
Hot Pressing ◽  
Raw Materials ◽  
Secondary Phase ◽  
Pressing Temperature ◽  
Xrd Pattern ◽  
Mean Grain Size ◽  
The Mean

In this work, a (SiC-AlN)/ZrB2 composite with outstanding mechanical properties was prepared by using polymer-derived ceramics (PDCs) and hot-pressing technique. Flexural strength reached up to 460 ± 41 MPa, while AlN and ZrB2 contents were 10 wt%, and 15 wt%, respectively, under a hot-pressing temperature of 2000 °C. XRD pattern-evidenced SiC generated by pyrolysis of polycarbosilane (PCS) was mainly composed by 2H-SiC and 4H-SiC, both belonging to α-SiC. Micron-level ZrB2 secondary phase was observed inside the (SiC-AlN)/ZrB2 composite, while the mean grain size (MGS) of SiC-AlN matrix was approximately 97 nm. This unique nano-micron hybrid microstructure enhanced the mechanical properties. The present investigation provided a feasible tactic for strengthening ceramics from PDCs raw materials.

Sign in / Sign up

Export Citation Format

Share Document