Study on Hot-Pressing Technology of Cement Bamboo Particleboard

2010 ◽  
Vol 168-170 ◽  
pp. 1233-1237
Author(s):  
Xin Gong Li ◽  
Xia Zheng ◽  
Yi Qiang Wu
Keyword(s):  
Hot Pressing ◽  
Variance Analysis ◽  
Technological Parameters ◽  
Pressing Temperature ◽  
Board Density ◽  
Regressive Analysis ◽  
Pressing Technology

The hot-pressing technology of cement bamboo particleboard was studied by changing hot-pressing temperature, adhesive/bamboo ratio, board density and additives amount of NaHCO3. Then variance analysis and regressive analysis were conducted on technological parameters. The results indicated that the optimizing technology parameters of cement bamboo particleboard are hot-pressing temperature 130 , adhesive/bamboo ratio 2.8, additives amount of NaHCO310%, boardl density 1.2g/cm3.

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.

Study on Hot-Pressing Process of Low-Cost Straw Particle Board

2012 ◽  
Vol 204-208 ◽  
pp. 3624-3628
Author(s):  
Qi Fei Ling ◽  
Xin Gong Li ◽  
Yong Lin Yan
Keyword(s):  
Hot Pressing ◽  
Low Cost ◽  
Urea Formaldehyde ◽  
Particle Board ◽  
Pressing Temperature ◽  
Adhesive Resin ◽  
Board Density ◽  
Pressing Time ◽  
Pressing Process ◽  
Physics Performance

The mixture of isocyanate and urea-formaldehyde adhesive resin was used to manufacture low-cost straw particle board by hot-pressing process. Influence of the hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive on straw particle board mechanical properties were studied. The resulted showed that, within a certain range, the straw particle board physics performance was improved with the increase of hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive. The proper hot-pressing process of cost-straw particleboard is hot-pressing time for 40s/mm, MDI applied amount of 3%,a density of 0.7 g/cm3, hot-pressing temperature of 180 °C

A Study on Sliced Bamboo Veneer-Chinese Fir Glulam Composite Panel

2010 ◽  
Vol 168-170 ◽  
pp. 2033-2036
Author(s):  
Chun Gui Du
Keyword(s):  
Hot Pressing ◽  
Chinese Fir ◽  
Woven Fabric ◽  
Composite Panel ◽  
Bottom Surface ◽  
Technological Parameters ◽  
Surface Color ◽  
Pressing Temperature ◽  
Pressing Time ◽  
Unit Pressure

Previous studies have indicated that Chinese fir glulam has many defects on surface: color is singleness, knot is more, surface is roughness, etc. This paper presents a study on the manufacturing technology of sliced bamboo veneer-Chinese fir glulam composite panel. Sliced bamboo veneer were glued on both the top and bottom surface of Chinese fir glulam. The results showed: (1)sliced bamboo veneer can beautify the surface of Chinese fir glulam; (2)sliced bamboo veneer should directly overlay on the surface of Chinese fir glulam, and it is not suitable back lining non-woven fabric in gluing; (3)the optimal composite technological parameters are: unit pressure: 0.7MPa; hot pressing temperature: 100°C; hot pressing time: 4min.

Optimization of Processing Parameters for Low VOC Emissions of Wood-Based Panels

2011 ◽  
Vol 148-149 ◽  
pp. 130-133 ◽  
Author(s):  
Yu Liu ◽  
Jun Shen ◽  
Xiao Dong Zhu
Keyword(s):  
Hot Pressing ◽  
Raw Materials ◽  
Orthogonal Design ◽  
Processing Parameters ◽  
National Standard ◽  
Pressing Temperature ◽  
Board Density ◽  
Volatile Organic ◽  
Press Time ◽  
Temperature Time

The influence of hot-pressing parameters on formaldehyde and other volatile organic compounds (VOC) were studied in this paper. The particleboard of larix gmelinii and UF resin were used as main raw materials. Orthogonal design was adopted to analyze the influence of hot-pressing temperature, time, resin and density on the concentration of formaldehyde and other VOC. The results showed that the emission of formaldehyde and other VOC were significantly affected by hot-pressing temperature, time, resin and density. The emission of formaldehyde and other VOC were obviously decreased in usage with the increasing of hot-pressing temperature, press time and the decreasing of density. Taking formaldehyde and other VOC emission into account, the optimized condition was hot-pressing temperature of 180°C, press time of 5 min, resin content of 11%, board density of 0.6g/cm3. The emissions of optimized particleboard satisfied the national standard GB18580-2001.

Investigation of Furfural Formation and Mechanical Properties of Suberinic Acids-Bonded Particleboards Depending on their Preparation Parameters

2021 ◽  
Vol 903 ◽  
pp. 235-240
Author(s):  
Raimonds Makars ◽  
Daniela Godiņa ◽  
Janis Rizhikovs ◽  
Aigars Paze ◽  
Ramunas Tupciauskas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
High Performance ◽  
Bending Strength ◽  
Ph Value ◽  
Raw Material ◽  
Technological Parameters ◽  
Pressing Temperature ◽  
Outer Bark ◽  
Wood Particles

Silver birch (Betula pendula) outer bark suberin can be used as a raw material to make an adhesive for particleboards (PBs). It is a promising formaldehyde-free alternative to traditional synthetic resins. However, the adhesive is acidic, which can catalyse furfural (FUR) formation from xylans in wood particles that are used for the preparation of PBs. FUR being a volatile organic compound can be emitted from the PBs and exposure to it can have harmful effects on humans. In the scope of this study, the effects on technological parameters (wet adhesive pH: 3, 6 and 9), glycerol as an additive to adhesive and hot-pressing temperature (180...230 °C) were investigated on the FUR formation in PBs. The FUR content was determined with high-performance liquid chromatography-ultraviolet spectroscopy system from the extracts of milled PBs. Mechanical properties (modulus of elasticity, bending strength, and thickness swelling) of the PBs were also studied. When using an adhesive with a pH 6 at hot-pressing temperature 230 °C with no glycerol added, it was possible to obtain PBs that satisfied the requirements of EN 312 P2 (boards for interior fitments). The FUR yield of these boards were more than 6 times lower than for the PBs pressed at 230 °C with a wet adhesive pH value 3.

Piemarker Unsaturated Polyester Composite Reinforced with Piemarker Fiber

2011 ◽  
Vol 393-395 ◽  
pp. 1341-1345
Author(s):  
Chen Xi Zhang ◽  
Hai Bing Huang ◽  
Cheng Chen ◽  
Wei Hong Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Hot Pressing ◽  
Unsaturated Polyester ◽  
Mass Ratio ◽  
Pressing Temperature ◽  
Polyester Composite ◽  
The Impact ◽  
Pressing Technology

In this paper, instead of glass fiber, a bio-fiber (piemarker fiber) was used to reinforce unsaturated polyester (UP). UP resin was reinforced with piemarker fiber (PF) in a mold under hot pressing. The mechanical properties of the result composites were tested and hot pressing procedure was optimized. The optimum hot pressing technology was obtained. When hot pressing temperature was 90°C and mat was hot pressed for 1.5h. The mechanical properties of the composites indicated that: the optimum mass ratio of piemarker fiber to UP was 30:70, at which the flexural strength of the composite was 48.77MPa, the tensile strength was 29.082MPa, and the impact strength was 9.89KJ/m2.

Research of Process on Making Bamboo Particle Board by Laccase-Treated Calcium Lignosulfonate

2011 ◽  
Vol 179-180 ◽  
pp. 1031-1036 ◽  
Author(s):  
Chun De Jin ◽  
Song Li ◽  
Li Liu ◽  
Jie Wang Ye ◽  
Chun Gui Du
Keyword(s):  
Hot Pressing ◽  
Processing Technique ◽  
Modulus Of Rupture ◽  
Pressing Pressure ◽  
Particle Board ◽  
Thickness Swelling ◽  
Pressing Temperature ◽  
Board Density ◽  
Significant Difference ◽  
Different Levels

The processing technique of bamboo particle board using laccase-treated calcium lignosulfonate was investigated and optimized. We studied the influence of enzyme amount, calcium ligosulfonate amount and hot pressing temperature on different particle board properties. All three factors were significant difference at different levels. There has significant differences between enzyme amount and Modulus of Rupture (MOR)，Modulus of Elasticity (MOE), Thickness Swelling (TS) (P<0.01)and Internal Bonding Strength (IB) (P<0.1). There has significant differences between Calcium lignosulfonate amount and MOR，TS(P<0.01), IB(P<0.05) and MOE (P<0.1). There has significant differences between hot pressing temperature and MOE，TS(P<0.01) and IB(P<0.1), but no significant differences on MOR. The optimum condition for board making as follows: enzyme amount 50u•g-1，calcium lignosulfonate amount 10%，hot pressing pressure 3.0MPa， 200°C and 7min while 0.75g•cm-3 board density and 10 mm thickness.

Technological Properties of Poplar Particle/Waste Rubber Powder Composites

2011 ◽  
Vol 194-196 ◽  
pp. 602-605
Author(s):  
Shu Ying Xin ◽  
Yong Cui ◽  
Min Xu ◽  
Jian Li
Keyword(s):  
Hot Pressing ◽  
National Standard ◽  
Board Density ◽  
Rubber Powder ◽  
Pressing Time ◽  
Waste Rubber ◽  
Powder Composites ◽  
Waste Rubber Powder ◽  
Powder Content ◽  
Pressing Technology

The hot-pressing technology for the poplar particle /waste rubber powder composites was studied using the poplar particle and waste rubber powder as raw materials. Effects of waste rubber powder content, hot-pressing time, hot-pressing temperature, resin content and board density were analyzed. The hot-pressing technology was better than molding technology. The optimal technological parameters of hot-pressing technology were obtained as board density0.8g/cm³, resin content3%, hot-pressing temperature160°C, hot-pressing time 7min , waste rubber powder content 30%. The testing results showed that the mechanical performances of the poplar particle /waste rubber powder composites made by the hot-pressing technology could achieve the Chinese National Standard for particle board.

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.

Microstructure and Magnetic Properties of Hot-Pressed and Hot-Deformed Composite Magnets Produced by Spark Plasma Sintering Method

2011 ◽  
Vol 686 ◽  
pp. 740-744 ◽  
Author(s):  
Yi Long Ma ◽  
Deng Ming Chen ◽  
Qian Shen ◽  
Peng Jun Cao
Keyword(s):  
Magnetic Properties ◽  
Spark Plasma Sintering ◽  
Hot Pressing ◽  
Magnetic Energy ◽  
Pressing Temperature ◽  
Energy Product ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Products ◽  
Fe Addition

Bulk isotropic and anisotropic Nd13.5Fe80.4Ga0.5B5.6 and Nd13.5Fe80.4Ga0.5B5.6/Fe magnets were synthesized by applying spark plasma sintering (SPS) technique. The effect of hot-pressing temperature on the magnetic properties of hot-pressed (HP) and hot-deformed (HD) magnets without additive and with 5% Fe addition was investigated. With increasing sintering temperature for HP magnets, the grain grew gradually. For HD magnets, the optimal magnetic properties could be obtained at hot-pressing temperature 680°C due to the development of desired c-axis texture and uniform microstructure, which resulted from the appropriate and uniform grain size in HP magnets. Fe addition could enhance remanence (Br) and magnetic energy products ((BH)m) of HP and HD magnets. However, the maximum magnetic energy product of HD magnets decreased when hot-pressing temperature was higher than 650°C.

Sign in / Sign up

Export Citation Format

Share Document