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.

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.

The Discussion of Manufacturing Peanut Hull and TPU Composites by Hot Pressing

2012 ◽  
Vol 518-523 ◽  
pp. 3527-3530
Author(s):  
Xin Yue Wang ◽  
Yong Ling Yu ◽  
Li Hua Lv
Keyword(s):  
Hot Pressing ◽  
Bending Strength ◽  
Orthogonal Experiment ◽  
Matrix Material ◽  
Pressing Pressure ◽  
Range Analysis ◽  
Molding Process ◽  
Pressing Time ◽  
Single Factor Analysis ◽  
Peanut Hull

In order to recycle the waste peanut hull and TPU(thermoplastic urethanes), the composite made from peanut hull powder which was used as reinforcing material and TPU which was used as matrix material by the method of blending and hot pressing was discussed. The parameters of molding process were designed by orthogonal experiment. The tensile property, bending property and impact property of composite materials were tested in this study. The molding process parameters were optimized with the methods of range analysis and single factor analysis. The results showed that the optimum conditions were given as followings: concentration of peanut hull powder was 60%, hot pressing temperature was 170°C, hot pressing pressure was 12Mpa, and hot pressing time was 5min. Under above conditions, excellent mechanic properties were achieved, which were that tensile strength was 19.63MPa, bending strength was 25.74MPa, impact energy absorption was 1.33 KJ/m2.

Fabrication and Properties of Corn Husk Fiber / Polylactic Acid Fiberboard

2013 ◽  
Vol 753-755 ◽  
pp. 798-801 ◽  
Author(s):  
Xiang Yu ◽  
Li Hua Lv ◽  
Chun Yan Wei ◽  
Wang Xiao ◽  
Yong Zhu Cui ◽  
...  
Keyword(s):  
Impact Strength ◽  
Polylactic Acid ◽  
Hot Pressing ◽  
Mass Fraction ◽  
Bending Strength ◽  
Process Condition ◽  
Raw Material ◽  
Optimal Process ◽  
Corn Husk ◽  
Pressing Time

In this study corn husk used as raw material, and achieved corn husk fiber through degumming properly. Then degradable fiberboard can be obtained with husk fiber and polylactic acid particles through blending and hot pressing. Taking mass fraction and length of corn husk fiber, hot-pressing time and temperature as factors, and taking tensile, bending and impact strength as index, through the L9 (34) orthogonal testing and range analyzing and achieved the optimal process parameters is: corn husk fiber mass fraction is 50%, corn husk fiber length is 10 mm, hot pressing time is 6 min, hot pressing temperature is 180 °C. Under the optimal process condition, a optimal fiberboard is obtained, whose tensile strength is 69.32 MPa, bending strength is 90.26 MPa, impact strength is 18.5 KJ/m2. The conclusion of this paper provides the theoretical guidance for the reuse technology of corn husk fiber.

Manufacture and Properties of Metasequoia-Based Three-Layer Parquet Flooring

2021 ◽  
Vol 71 (2) ◽  
pp. 144-149
Author(s):  
Huimin Zhang ◽  
Zhanguang Wang ◽  
Quan Li ◽  
Cuixiang Lu
Keyword(s):  
Hot Pressing ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Reference Value ◽  
Formaldehyde Emission ◽  
Formaldehyde Resin ◽  
Pressing Pressure ◽  
Pressing Temperature ◽  
Frequency Condition ◽  
Pressing Time

Abstract Metasequoia-based three-layer parquet flooring (MPF) was prepared under the following conditions: hot-pressing temperature of 95°C, hot-pressing time of 7 minutes, hot-pressing pressure of 9 kg·cm−2, and addition of 200 g·m−2 urea-formaldehyde resin adhesive. The results showed that the moisture content, density, formaldehyde emission, static bending strength, and elastic modulus of the three kinds of parquet flooring were not much different than poplar-based multilayer parquet flooring (PPF) or fir-based three-layer parquet flooring (FPF) on the market. The thermal conductivity of the MPF was 0.195 W·m−1·K−1, which was the lowest among the three kinds of parquet flooring. The sound absorption coefficient of MPF under 11 frequency conditions in the range of 0.2 to 2 kHz was higher than that of PPF and FPF under the same frequency condition. The research results provide a reference value for the efficient use of low-quality M. glyptostroboides wood.

scholarly journals Environmentally-Friendly High-Density Polyethylene-Bonded Plywood Panels

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1166 ◽  
Author(s):  
Pavlo Bekhta ◽  
Ján Sedliačik
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
High Density Polyethylene ◽  
Phenol Formaldehyde ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Core Layer ◽  
High Density ◽  
Pressing Pressure ◽  
Pressing Time

Thermoplastic films exhibit good potential to be used as adhesives for the production of veneer-based composites. This work presents the first effort to develop and evaluate composites based on alder veneers and high-density polyethylene (HDPE) film. The effects of hot-pressing temperature (140, 160, and 180 °C), hot-pressing pressure (0.8, 1.2, and 1.6 MPa), hot-pressing time (1, 2, 3, and 5 min), and type of adhesives on the physical and mechanical properties of alder plywood panels were investigated. The effects of these variables on the core-layer temperature during the hot pressing of multiplywood panels using various adhesives were also studied. Three types of adhesives were used: urea–formaldehyde (UF), phenol–formaldehyde (PF), and HDPE film. UF and PF adhesives were used for the comparison. The findings of this work indicate that formaldehyde-free HDPE film adhesive gave values of mechanical properties of alder plywood panels that are comparable to those obtained with traditional UF and PF adhesives, even though the adhesive dosage and pressing pressure were lower than when UF and PF adhesives were used. The obtained bonding strength values of HDPE-bonded alder plywood panels ranged from 0.74 to 2.38 MPa and met the European Standard EN 314-2 for Class 1 plywood. The optimum conditions for the bonding of HDPE plywood were 160 °C, 0.8 MPa, and 3 min.

Preliminary Research on Manufacturing Technology of Thin Bamboo Veneer Consolidated Composite Floor

2012 ◽  
Vol 503-504 ◽  
pp. 74-77
Author(s):  
Nan Hu ◽  
Xian Jun Li ◽  
Yi Qiang Wu ◽  
Xin Gong Li ◽  
Zhi Cheng Xue
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Bond Strength ◽  
Hot Pressing ◽  
Physical And Mechanical Properties ◽  
Pressing Pressure ◽  
Pressing Temperature ◽  
Decorative Material ◽  
Preliminary Research ◽  
Surface Bond

In this paper, the new bamboo-based consolidated composite floors were fabricated with thin bamboo veneers which used as decoration layers, wear resistant layers, high density fiberboards and equilibrium layers through assembling and scuffing. The effect rules of the composite floor on properties were preliminarily studied by three factors: hot-pressing temperature, pressure and time. The results showed that the wear resistance and surface bond strength of the thin bamboo veneer consolidated composite floor significantly increased with the rise of hot-pressing temperature. In the scope of resources, the effect of hot-pressing pressure and time on properties of the floor is not significant. The optimizing technology is hot-pressing temperature 170°C, pressure 3MPa and time 40s/mm in this study. The thin bamboo veneer consolidated composite floor is an excellent floor decorative material, which has good physical and mechanical properties.

Study on Structural Plywood Production Technology from Eucalyptus/poplar

2012 ◽  
Vol 476-478 ◽  
pp. 1547-1552 ◽  
Author(s):  
Li Hong Yao ◽  
Xi Ming Wang ◽  
Ben Hua Fei
Keyword(s):  
Bond Strength ◽  
Production Technology ◽  
Hot Pressing ◽  
Rapid Development ◽  
Practical Significance ◽  
Pressing Pressure ◽  
Poplar Plantation ◽  
Pressing Temperature ◽  
Pressing Time ◽  
The Difference

With the rapid development of wooden structure buildings in China, the demand for structural plywood enlarges significantly. Eucalyptus and poplar plantation is a very wide area of growth in china, therefore, there is practical significance to use eucalyptus and poplar plantation to produce wooden structural plywood. This study uses orthogonal test on pressing temperature, pressing time, pressing pressure, veneer glue spread - four factors influence the bond strength of structural plywood from Eucalyptus/poplar, and has obtained the superior technology. The results show that hot pressing temperature, pressing time, pressing pressure, veneer glue spread –four factors affect the bond strength of the structure plywood significantly, but the difference among the three veneer glue spread levels is not significantly. The better production technology is hot pressing temperature 135 °C, pressing time 24 min, pressing pressure 1.2 Mpa, veneer glue spread 320 g/m2.

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.

High Compressive Strength of Palm Oil Empty Fruit Bunches (Elaeis guineensis) Composites

2014 ◽  
Vol 896 ◽  
pp. 557-561 ◽  
Author(s):  
Ida Sriyanti ◽  
Lina Agustina ◽  
Iftita Selviana ◽  
Leni Marlina
Keyword(s):  
Compressive Strength ◽  
Silica Nanoparticles ◽  
Hot Pressing ◽  
Elaeis Guineensis ◽  
Pressing Pressure ◽  
Mass Ratio ◽  
Pressing Temperature ◽  
Pressing Method ◽  
Empty Fruit Bunches ◽  
Pressing Time

Simple mixing and hot pressing methods were used to make high strength and light-weight composite from oil palm empty fruit bunches (OPEFB) using PVAc as an adhesive and silica nanoparticles as a filler. The mechanical strength of the composite was examined in term of compressive strength. The simple mixing method was used to mix composition with PVAc and silica nanoparticles. Silica nanoparticles were added as filler. Hot pressing method was used to press the mixed composites at a pressing pressure of 85 MPa, pressing temperature of 150 °C, and pressing time of 20 minutes. The optimum composition in term of compressive strength for the strongest composite had a mass ratio of OPEFB/PVAc of 13 : 2 and obtained a compressive strength of 82,88 MPa. Higher compressive strength of 100,39 MPa was obtained by adding the silica nanoparticles at a mass ratio of OPEFB/PVAc/silica nanoparticles of 13 : 2 : 0,75. At pressing pressure of 100 MPa, pressing temperature of 150 °C, and pressing time of 20 minutes, we found compressive strength of 115,35 MPa. Data analysis of XRD showed that the used silica nanoparticles were in amorphous phase or had broad pattern. The compressive strength data showed that the composites were stronger than the composites made by Masturi and Kumagizuri, and also stronger than the ordinary wood-based composites. Thus, the composites are feasible to be used to replace wood-based composites, especially in furnishings.

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.

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