The Technology of Manufacturing Waste Fiber and Flame Retardant TPU Composites by Mixed Hotpressing

2012 ◽  
Vol 518-523 ◽  
pp. 3557-3560
Author(s):  
Fei Fei Chi ◽  
Yong Ling Yu ◽  
Li Hua Lv
Keyword(s):  
Heat Transfer ◽  
Mechanical Properties ◽  
Heat Transfer Coefficient ◽  
Hot Pressing ◽  
Bending Strength ◽  
Fiber Composite ◽  
Orthogonal Experiment ◽  
Optimum Conditions ◽  
Blend Fiber ◽  
Properties Of Composites

For the large number of waste cotton/hemp blend fiber, the molding technology of manufacturing waste blend composites was designed and optimized by mixed hot pressing in this paper, and the mechanical properties of composites were analyzed. Through the orthogonal experiment, the optimum conditions were given as follows: cotton, hemp, TPU fiber composite: the ratio of waste blending fiber 40:60,hotpressing temperature180°C，the concentration of TPU 60%,hotpressing pressure 10Mpa,.The density of composite made by this condition was1.220 g/cm2. Under above conditions, the composites had the density 1.220g/cm2, the tensile strength32.30Mpa, the bending strength 28.51Mpa and the energy absorption of impact 37.25 KJ/m2, heat transfer coefficient 0.0018W/M•K.

The Molding Technology of Manufacturing Waste Blend Fiber Composites by Mixed Hotpressing

2011 ◽  
Vol 331 ◽  
pp. 699-702
Author(s):  
Li Hua Lv ◽  
Guang Jian Wan ◽  
Yong Ling Yu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Energy Absorption ◽  
Bending Strength ◽  
Fiber Composites ◽  
Optimum Conditions ◽  
Blend Fiber ◽  
Properties Of Composites

For the waste polyester/cotton/hemp blend fiber of largest abandoned number,this paper designed and optimized the molding technology of manufacturing waste blend waste composites by mixed hotpressing,and analyzed the mechanical properties of composites. Through the orthogonality experiment,the optimum conditions were given as follows:the ratio of waste blend fabrics 1:1,the Concentration of PP 60%,the temperature of hotpressing 185°C，the hotpressing pressure 12Mpa, the hotpressing time 5min. Under above conditions,the composites had the density 0.9326g/cm2,the tensile strength 45.37Mpa, the bending strength 48.31Mpa and the energy absorption of impact 15.32 KJ/m2.

Fabrication of Carbon Nanotube Reinforced Boron Carbide Composite by Hot-Pressing Following Extrusion Molding

2014 ◽  
Vol 616 ◽  
pp. 27-31 ◽  
Author(s):  
Tomohiro Kobayashi ◽  
Katsumi Yoshida ◽  
Toyohiko Yano
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Elastic Modulus ◽  
Carbon Nanotube ◽  
Boron Carbide ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Bending Strength ◽  
Extrusion Direction ◽  
Sem Observation

The CNT/B4C composite with Al2O3 additive was fabricated by hot-pressing following extrusion molding of a CNT/B4C paste, and mechanical properties of the obtained composite were investigated. Many CNTs in the composite aligned along the extrusion direction from SEM observation. 3-points bending strength of the composite was slightly lower than that of the monolithic B4C. Elastic modulus and Vickers hardness of the composite drastically decreased with CNT addition. Fracture toughness of the composite was higher than that of the monolithic B4C.

Physic-Mechanical Properties of Composites Based on Secondary Polypropylene and Dispersed of Plant Waste

2020 ◽  
Vol 1006 ◽  
pp. 227-232
Author(s):  
Yuliya Danchenko ◽  
Artem Kariev ◽  
Vladimir Lebedev ◽  
Elena Barabash ◽  
Tatyana Obizhenko
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Wood Flour ◽  
Chemical Properties ◽  
Uniform Structure ◽  
Internal Stresses ◽  
Agricultural Plants ◽  
Oat Husk ◽  
Filled Composite ◽  
Properties Of Composites

The physic-mechanical properties of filled composites based on secondary polypropylene are investigated. As fillers the dispersed wastes of processing of agricultural plants - buckwheat and oat husk, as well as needles flour and wood flour were used. Water absorption, abrasion, impact strength and bending strength of composites were investigated. It has been proven that oat and buckwheat husks can be effectively used in composites based on secondary polypropylene and replace traditional wood fillers. It has been shown that the physic-chemical properties of the filled composites depend on the structure and physicochemical interactions on the phase separation surface, as well as on the surface properties of the filler particles. It is established that for the production of filled composites with improved physic-mechanical characteristics it is necessary to use fillers with small specific surface and concentration of surface functional groups, and the acid-base characteristic of the surface should be closer to neutral. It is shown that these conditions provide for the formation of a uniform structure of the filled composite with less internal stresses.

Fabrication and Mechanical Properties of SiC/Cu Composites with Zn Addition by Hot Pressing Sintering

2013 ◽  
Vol 745-746 ◽  
pp. 700-705
Author(s):  
Huang Liu ◽  
Guo Qiang Luo ◽  
Pin Gan Chen ◽  
Qiang Shen ◽  
Lian Meng Zhang
Keyword(s):  
Mechanical Properties ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Bending Strength ◽  
Coefficient Of Thermal Expansion ◽  
High Volume ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zn Addition ◽  
Hot Pressing Sintering

SiC/Cu composites exhibit low density, low coefficient of thermal expansion and excellent mechanical properties. In this study, Zn of 2 wt. % was added as the sintering activator, and the high volume faction (60%) SiC/Cu composites was fabricated by hot pressing sintering technology. The phase composition and morphology of as-prepare samples were characterized by X-ray diffraction (XRD) system and scanning electron microscopy (SEM) equipped with an energy-dispersive spectroscopy (EDS) system. The as-prepared SiC/Cu composites were dense and uniform as well as void free. The results show that SiC/Cu composites can reach excellent mechanical properties of SiC/Cu composites. With the increase of sintering temperature, Vickers hardness and the bending strength of the samples increased obviously and the as-prepared SiC/Cu composites achieved a maximum Vickers hardness and bending strength respectively of 195MPa and 140MPa.

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.

Microstructure and Mechanical Properties of AlN Particle Reinforced Mg-Al Matrix Composites with Different Particle Contents

2018 ◽  
Vol 913 ◽  
pp. 522-528 ◽  
Author(s):  
Yong Wang ◽  
Kai Ming Cheng ◽  
Ji Xue Zhou ◽  
Wei Hong Li ◽  
Jin Huan Xia
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Load Transfer ◽  
Bending Strength ◽  
Energy Dispersive Spectrometer ◽  
Testing Machine ◽  
Matrix Alloy ◽  
Strengthening Mechanism ◽  
Al Matrix Composites ◽  
Properties Of Composites

In this paper, magnesium matrix composite with different AlN particles content were fabricated by powder metallurgy. The microstructure of composites was investigated by scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM). The mechanical properties of composites were measured by electronic universal testing machine. The results show that the best densification and the highest mechanical properties of composites reached when the addition of 6wt.% reinforcement at 620 °C for 1 hour. Additionally, the compressive strength and bending strength of composites were 217.06 MPa and 207.40 MPa respectively, increased by 79.2% and 91.12% compared with matrix alloy, and the reinforcement particles uniformly distributed in the matrix alloy. It may be concluded that the strengthening mechanism of composites is mainly attributed to grain refinement, load transfer, and dislocation strengthening.

Effect of Different Kinds of CaSO4 Whisker on the Bending Strength and Hygroscopicity of Gypsum Board

2014 ◽  
Vol 638-640 ◽  
pp. 1322-1325 ◽  
Author(s):  
Chang Chen ◽  
Yu Bin Wang ◽  
Hua Wang ◽  
Qian Qian Deng ◽  
Lei Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Sulfate ◽  
Bending Strength ◽  
Gypsum Board ◽  
Specific Strength ◽  
Different Types ◽  
Calcination Method ◽  
Calcium Sulfate Whiskers ◽  
Calcium Sulfate Whisker ◽  
Properties Of Composites

Different kinds of hemihydrate calcium sulfate whiskers were fabricated by calcination method under the condition of 115-600 °C. And the density, moisture rate and mechanical properties of composites of gypsum and whisker were studied. The specific strength of composites was investigated. The results show that gypsum boards with whisker calcined at 115 °C and 300 °C have the maximum and minimum densities, which are about 1658 kg/m3 and 1604 kg/m3, respectively. Hydration ability of anhydrous calcium sulfate whisker is the strongest. The values of specific strength of gypsum board reinforced by different types of whiskers suggested that the porosity of the composites changed with the different kinds of whiskers, which agreed well with the moisture rate and mechanical properties.

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