Research New Waterproof Agent of the Particleboard

2014 ◽  
Vol 960-961 ◽  
pp. 43-46
Author(s):  
Zhao Yan
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Hot Pressing ◽  
Rapid Development ◽  
Wood Fiber ◽  
Plate Thickness ◽  
Raw Material ◽  
Living Standard ◽  
Optimum Process ◽  
Corn Straw

Modern society,with the rapid development of economy,people living standard increasing, for the plate demand continues to grow. Because the forest resources dwindling, To make full use of waste bagasse, corn straw and non wood fiber materials to produce an artificial plate material instead of wood man-made board has be imperative.Corn straw shavings can realize the recycling of waste materials, bring the economic value, so this topic with corn straw shavings as raw material, in the laboratory preparation of melamine resin adhesive, pressing flake molded sheet.Melamine plastic using M ( melamine ):U ( urea ) :F ( formaldehyde ) =1∶0.6∶2.5, adhesive solid content is 54%, the sizing, hot pressing temperature, hot pressing time as three factors orthogonal experiment, pressed sheet. On the plate thickness swelling, internal bond strength and surface plate bending strength test, on the analysis and summarization of results, the optimum process parameters: sizing quantity20%, temperature 150 °C, hot pressing time25min. The corresponding optimum mechanical properties: the absorbing water thickness expansion rate (2H ) 9.76%, inner strength, bend strength of17.49Mpa,0.45MPa. Key words: Non wood shavings; Molded sheet; Process parameters; Mechanical properties

Prediction model for the mechanical properties of compacted poplar powder generated via hot-pressing

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 4947-4962
Author(s):  
Jin Yan ◽  
Jianan Liu ◽  
Liqiang Zhang ◽  
Zhili Tan ◽  
Haoran Zhang ◽  
...  
Keyword(s):  
Neural Network ◽  
Mechanical Properties ◽  
Network Model ◽  
Process Parameters ◽  
Neural Network Model ◽  
Hot Pressing ◽  
Process Conditions ◽  
Wood Powder ◽  
Single Factor ◽  
The Relationship

The influence of the process parameters on the mechanical properties of compact wood powder generated via hot-pressing was analyzed through a single-factor experiment. The mechanical properties exhibited a nonlinear trend relative to the process conditions of hot-pressed compact wood powder. The relationship models between the process parameters and the mechanical properties for the compact wood powder were established by applying a multiple regression analysis and neural network methods combined with data from an orthogonal array design. A comparison between experimental and predicted results was made to investigate the accuracy of the established models by applying several data groups among the single-factor experiments. The results showed that the accuracy of the neural network model in terms of predicting the mechanical properties was greater compared with the multiple regression model. This demonstrates that the established neural network model had a better prediction performance, and it can accurately map the relationship between the process conditions and the mechanical properties of the compact wood powder.

scholarly journals The Effect of the Parameters of T-RTM on the Properties of Polyamide 6 Prepared by in Situ Polymerization

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 4 ◽  
Author(s):  
Orsolya Viktória Semperger ◽  
András Suplicz
Keyword(s):  
Mechanical Properties ◽  
Automotive Industry ◽  
Cycle Time ◽  
In Situ Polymerization ◽  
Rapid Development ◽  
Polyamide 6 ◽  
Raw Material ◽  
Short Cycle ◽  
Short Cycle Time

With the rapid development of the automotive industry, there is also a significant need to improve the raw materials used. Therefore, the demand is increasing for polymer composites with a focus on mass reduction and recyclability. Thermoplastic polymers are preferred because of their recyclability. As the automotive industry requires mass production, they require a thermoplastic raw material that can impregnate the reinforcement in a short cycle time. The most suitable monomer for this purpose is caprolactam. It can be most efficiently processed with T-RTM (thermoplastic resin transfer molding) technology, during which polyamide 6 is produced from the low-viscosity monomer by anionic ring-opening (in situ) polymerization in a tempered mold with a sufficiently short cycle time. Manufacturing parameters, such as polymerization time and mold temperature, highly influence the morphological and mechanical properties of the product. In this paper, the properties of polyamide 6 produced by T-RTM are analyzed as a function of the production parameters. We determine the crystallinity and the residual monomer content of the samples and their effect on mechanical properties.

Evaluation of mechanical properties and surface roughness of cotton–viscose hybrid composite

2020 ◽  
pp. 096739112090905
Author(s):  
Kuppuraj Arunkumar ◽  
Angamuthu Murugarajan
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Composite Material ◽  
Process Parameters ◽  
Water Pressure ◽  
Machining Process ◽  
Optimum Process ◽  
Process Conditions ◽  
Machined Surface ◽  
Reinforced Composite

Natural-fibre reinforced composite material is an emerging material that has great potential to be used in various industrial aspects and applications. The cotton-viscose-reinforced composite is prepared using a compression moulding process. In addition to it, analysis of its mechanical properties was also carried out, such as tensile strength, flexural strength, impact strength and hardness. An attempt was made to process the prepared composite material using abrasive water jet machining (AWJM) under different process parameters (water pressure, nozzle transfer speed and abrasive flow rate) levels to determine the better suitable process conditions to achieve the better surface finish and optimize the machining process. The significance of the optimization process was ensured using the results of the analysis of variance. Morphological analyses of the machined surface were performed using a scanning electron microscope. The surface roughness of 8.28 µm was found to be the optimized process parameter. Optimum process parameters in AWJM are used to improve the surface quality.

scholarly journals STUDY OF RECEIVING WOOD AND PLANT PLASTICS WITHOUT BINDERS IN THE PRESENCE OF CATALYSTS OF POLYOXOMETALLATES TYPE

2018 ◽  
Vol 8 (1) ◽  
pp. 132-138
Author(s):  
Виктор Бурындин ◽  
Viktor Buryndin ◽  
Лариса Бельчинская ◽  
Larisa Belchinskaya ◽  
Андрей Савиновских ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Functional Groups ◽  
Hot Pressing ◽  
Raw Materials ◽  
Flexural Modulus ◽  
Chemical Activation ◽  
Physical And Mechanical Properties ◽  
Strength Properties ◽  
Raw Material ◽  
Plastic Properties

The possibility of obtaining wood and plant plastics without a binder (WP-WB) in the presence of a catalyst of man-ganese-containing sodium vanadomolybdophosphate has been investigated. The use of this catalyst makes it possible to reduce the temperature of hot pressing in closed molds from 1,800°C to 1,600°C. The fractional composition of the initial press raw material influences physical and mechanical properties of WP-WB. Higher values of the plastic properties are obtained by using a 0.7 mm fraction, which is associated with an increased specific surface area of the particles compared to 1.3 mm particles. The results has showed that the samples obtained by using the catalyst have increase in strength properties (flexural strength, flexural modulus, hardness) at lower pressing temperature, but reduction of water resistance performance has been observed . This is explained by the increase in the content of functional groups when using a catalyst. The process of obtaining plastic can be broken down into two successive stages: the first is hydrothermal destruction of lignin-carbohydrate complex (initial moisture of the press raw material is 12%, the temperature of hot pressing in closed molds is 160 ... .180 ° C) and partial chemical activation of lignin as a result of hydrogen peroxide and catalyst application; the second stage - formation of plastic with the formation of a network structure due to the formed functional groups. It is established that the values of physical and mechanical properties of WP-WB are higher than those of plastic obtained on the basis of plant raw materials (PP-WB). This can be explained by the fact that lignin of coniferous species has the guaiacylpropane structure, while plant raw material has a hydroxyphenylpropane structure

Practice of Taguchi design of experiments in the valuation of mechanical behavior of rigid polyurethane foam composites

2021 ◽  
pp. 096739112110413
Author(s):  
Raminder Kaur ◽  
Mukesh Kumar
Keyword(s):  
Mechanical Properties ◽  
Design Of Experiments ◽  
Mechanical Behavior ◽  
Polyurethane Foam ◽  
Process Parameters ◽  
Taguchi Design ◽  
Optimum Process ◽  
Rigid Polyurethane Foam ◽  
Individual Parameter ◽  
Taguchi Design Of Experiments

In the present study, Taguchi design of experiments (DOEs) L18 orthogonal array has been used for the investigation of the mechanical behavior of rigid polyurethane foam (RPUF) composites. The outcome of the process parameters such as polyol, filler, surfactant, catalyst, blowing agent, and anti-flaming agent on the mechanical properties, such as tensile, flexural, and compressive strengths and hardness (Shore D) of RPUF composites, has been examined, and the resulted data were analyzed by means of Taguchi design of experiments. The raw data for the average values of the mechanical properties and the signal-to-noise (S/N) ratio for each parameter were evaluated at three levels, and the analysis of variance (ANOVA) and optimum process parameters are determined. The confirmation experiments were performed for the validation of the improved performance and to measure the contribution of individual parameter on the responses. The confirmation experiments revealed the average tensile strength, average compressive strength, average flexural strength, and average hardness (Shore D) as 5.24 MPa, 6.37 MPa, 12.28 MPa, and 72.43, respectively, which fall within the 95% confidence interval of the anticipated optimum process parameters.

Optimization of Process Parameters for Fabrication of Wool Fiber-Reinforced Polypropylene Composites with Respect to Mechanical Properties

2014 ◽  
Vol 9 (3) ◽  
pp. 155892501400900 ◽  
Author(s):  
Rajkumar Govindaraju ◽  
Srinivasan Jagannathan ◽  
Mohanbharathi Chinnasamy ◽  
P. Kandhavadivu
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Compression Molding ◽  
Wool Fiber ◽  
Optimum Process ◽  
Process Conditions ◽  
Regression Equations ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Optimization Of Process Parameters

The present study focused optimizing the process parameters of compression molding with respect to mechanical properties for fabrication of wool fiber-reinforced polypropylene composites. An experiment was designed using the Box-Behnken method with three levels and three variables using temperature, time, and pressure, as independent variables and tensile, flexural, and impact strengths as dependent variables. The process conditions were optimized using response surface methodology with the Box-Behnken experimental design. Regression equations were obtained to analyze tensile strength, flexural strength, and impact strength and the optimum process parameters were identified. The results show that the optimum conditions for compression molding are 176°C, 7 min, and 35 bar.

Mathematical Model to Predict Tensile Strength of Underwater Friction Stir Welded (UFSW) on 5052 Aluminium Alloys

2018 ◽  
Author(s):  
Dhanis Paramaguru ◽  
Srinivasa Rao Pedapati ◽  
Mokhtar Awang ◽  
Hamed Mohebbi
Keyword(s):  
Mechanical Properties ◽  
Mathematical Model ◽  
Process Parameters ◽  
Welding Speed ◽  
Rotational Speed ◽  
Polynomial Regression ◽  
Coefficient Of Determination ◽  
Optimum Process ◽  
Tool Rotational Speed ◽  
Friction Stir

In this study, AA5052 joints are fabricated by underwater friction stir welding and the process parameters are optimized for maximum UTS value by utilizing a developed mathematical model. The experiments are conducted by using Taguchi’s L9 orthogonal array, and polynomial regression analysis is applied to generate the model. Statistical tools such as analysis of variance (ANOVA), coefficient of determination is applied to check the adequacy of the developed model at 95% confidence level. Type of welding tools is identified as the most influencing factor on deciding the mechanical properties of the joint, followed by tool rotational speed and tool welding speed. The optimum process parameters are identified by the Taguchi parametric design method. The results indicated that the optimum process parameters combinations for better mechanical properties is attained at tool rotational speed of 1500 rpm and tool welding speed of 100 mm/min, using taper threaded cylindrical tool. A maximum UTS value of 225.48 MPa is obtained and it is verified by confirmation test.

The Experimental Studies on Self-Heat Conserving Facade Panel with Waste Fibers

2011 ◽  
Vol 415-417 ◽  
pp. 1521-1524
Author(s):  
Hong Cao Wang ◽  
Yong Ling Yu ◽  
Li Hua Lv
Keyword(s):  
Hot Pressing ◽  
Experimental Studies ◽  
Raw Material ◽  
National Standard ◽  
Optimum Process ◽  
Process Conditions ◽  
Insulation Property ◽  
Pressing Temperature ◽  
Plastic Composite ◽  
External Insulation

This paper introduces the studies of self-heat conserving facade panel with abandoned polypropylene fiber. The optimum process conditions were studied. The tensile properties, bending and impact properties of external insulation panel were tested. The results show that when the hot-pressing temperature is 180°C , the tensile, bending and impact of external insulation panel are best. The optimum process is hot-pressing temperature of 180 °C, hot pressure of 10MPa, hot-pressing time 12 Min. The physico-chemical properties were tested. The results show that the data of each test is up to the china national standard .The heat insulation property was tested, the results show that the panels have good insulation performance. The wallboard is light and easy to transport. Because the raw material adopts recycled polypropylene fibers, the price is low and the insulation is good. Recycled fiber-plastic composite is filled with bright future prospects.

Mechanical Properties Evaluation of Friction Stir Welded AA6061-AA7075 Alloys for Different Tool pin Geometries

2019 ◽  
Vol 895 ◽  
pp. 295-300
Author(s):  
Rao R. Raghavendra ◽  
N. Bharath ◽  
S. Pradeep ◽  
C.K. Yogisha
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Dissimilar Materials ◽  
Hardness Test ◽  
Green Technology ◽  
Optimum Process ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Solidification Cracks ◽  
Tool Pin

The friction stir welding is a solid state welding in which welding takes place at a temperature below the melting point. This welding is also known as green technology welding as no harmful gases are generated, as well as fluxes are not formed. In this process joining of two dissimilar materials can be achieved. Through this welding one can overcome defects like porosity, solidification, cracks etc by selecting suitable wilding parameters. Present work investigates the effect of different tool pin geometries on mechanical properties of friction stir welded AA6061 and AA7075 alloys keeping the process parameters constant. The welding is carried with process parameters 1000rpm, 50mm/min and 5KN as tool rotational speed, welding speed and axial load respectively, and for four different pin geometries: (a) cylindrical pin, (B) triangular pin, (c) square pin and (d) hexagonal pin. The welded samples are characterized by mechanical properties like tensile strength and micro Vickers hardness test. By considering the both properties the hexagonal pin shown better characteristics under optimum process parameters.

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