Effect of using Trilobal® polyester on the functional performance of fencing suit

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mohamed A. Saad ◽  
Fatma Metwaly ◽  
Sarah Yahia Gad ◽  
Khaled Mansour Mansour ◽  
Marwa A. Ali
Keyword(s):  
Mechanical Properties ◽  
Functional Performance ◽  
Physical And Mechanical Properties ◽  
Test Analysis ◽  
Content Type ◽  
Weave Structure ◽  
Vertical Wicking ◽  
Long Time ◽  
Density Factor ◽  
Face Structure

Purpose The paper aims to use the Trilobal® polyester (Y cross-section) for producing fabrics suitable for fencing suits and evaluating their various properties. Design/methodology/approach Double weave structure was chosen to produce the samples by using six different face structures and two back structures divided into two groups according to the back structures. They were evaluated by their physical and mechanical properties such as tensile strength, puncture resistance, air permeability and humidity properties in horizontal and vertical wicking, drying rate and water vapor transmission. Findings Fencing sport recently is one of the most growing sports in the world, which necessitates special requirements and properties of fencing suit, either mechanical properties, which allow the easily and freely movement for the athlete, or the comfort properties that save the player’s effort and energy for a long time to improve his performance. Originality/value ANOVA test analysis showed highly significant results in some properties comparing back and face structures of the double weave fabric high correlation coefficient were found between packing density factor of produced fabric and the weft material types. The final results showed the produced sample that weaved with plain 1/1 for back structure and warp rib 2/2 for face structure achieved the best results, followed by the produced sample weaved with plain 1/1 for back structure and weft rib 2/2 for face structure compared with the other produced samples.

Physical and Mechanical Properties of Hybrid Laminated Bamboo-Wood Veneer Board (HLBWVB) for Furniture Components

2015 ◽  
Vol 1134 ◽  
pp. 143-146 ◽  
Author(s):  
Muhamad Iqram Ibrahim ◽  
Siti Rafedah Abd Karim ◽  
Tuan Anis Nadia Tuan Mohd Saipudin ◽  
Abdul Hamid Salleh
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Wood Veneer ◽  
Test Analysis ◽  
Laminated Bamboo ◽  
The Mean ◽  
Screw Withdrawal ◽  
Dendrocalamus Asper

In this study, betong bamboo (Dendrocalamus asper) veneers were laminated with sesenduk wood (Endospermum diadenum) veneers to form Hybrid Laminated Bamboo-Wood Veneer (HLBWVB) using urea formaldehyde (UF) as glue. The HLBWVB was pressed at two levels of pressure viz. 70 kg/cm2 and 130 kg/cm2. The physical properties such as moisture content (%), density (kg/m3) and de-lamination (%), and also the mechanical properties such as bending (MPa), screw withdrawal (N) and shear (MPa) were determined in accordance to BS:EN 1993. From an independent t-test analysis p≤0.05; it was found that there are significant differences in the mean of all variable tested except for delamination test. It is shown that high pressure gives the best physical and mechanical properties compare to lower pressure.

Study on properties of decolorizing yakwool fiber and spun yarn

2019 ◽  
Vol 31 (1) ◽  
pp. 90-102
Author(s):  
Qin Xiaoxuan ◽  
Hui’e Liang ◽  
Xuzhong Su ◽  
Xinjin Liu
Keyword(s):  
Mechanical Properties ◽  
Design Methodology ◽  
Natural Fiber ◽  
Physical And Mechanical Properties ◽  
Optimal Process ◽  
Textile Processing ◽  
Content Type ◽  
Oxidation Reduction ◽  
Spun Yarn

Purpose As a natural fiber, yakwool has attracted much attention in textile processing due to its excellent properties and wearabilities. However, the main colors of yakwool are black and brown. Therefore, for extending the application scopes of the fiber, the decolorization of the yakwool fiber is usually needed, especially for the black fiber. The paper aims to discuss this issue. Design/methodology/approach In the paper, the properties of the yakwool fiber were tested first, especially the melanin granules in the fiber. Then, the decolorization of the yakwool fiber was studied using the oxidation–reduction decolorization method, and corresponding optimal process of the decolorization was given. Then, the properties of the decolorized yakwool fiber were tested and compared with those of the original fiber. Findings It is shown that, after decolorization, the physical and mechanical properties of the fiber were deteriorated, especially in terms of the strength and elongation. Therefore, the fiber became shorter and thinner, and the scales were damaged. When compared with the yarn spun from the original yakwool fiber, it was observed that the properties of the yarn spun from the decolorized yakwool fiber deteriorated because of the deterioration in the properties of the original fiber. Originality/value In the paper, for extending the application scopes of the yakwool fiber, the decolorization of the yakwool fiber was studied.

The potential of metal epoxy composite (MEC) as hybrid mold inserts in rapid tooling application: a review

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Radhwan Bin Hussin ◽  
Safian Bin Sharif ◽  
Shayfull Zamree Bin Abd Rahim ◽  
Mohd Azlan Bin Suhaimi ◽  
Mohd Tanwyn Bin Mohd Khushairi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Composite ◽  
Mold Insert ◽  
Physical And Mechanical Properties ◽  
Rapid Tooling ◽  
Current Application ◽  
Content Type ◽  
Manufacturing Technologies ◽  
New Formulation ◽  
Research Studies

Purpose Rapid tooling (RT) integrated with additive manufacturing technologies have been implemented in various sectors of the RT industry in recent years with various kinds of prototype applications, especially in the development of new products. The purpose of this study is to analyze the current application trends of RT techniques in producing hybrid mold inserts. Design/methodology/approach The direct and indirect RT techniques discussed in this paper are aimed at developing a hybrid mold insert using metal epoxy composite (MEC) in increasing the speed of tooling development and performance. An extensive review of the suitable development approach of hybrid mold inserts, material preparation and filler effect on physical and mechanical properties has been conducted. Findings Latest research studies indicate that it is possible to develop a hybrid material through the combination of different shapes/sizes of filler particles and it is expected to improve the compressive strength, thermal conductivity and consequently increasing the hybrid mold performance (cooling time and a number of molding cycles). Research limitations/implications The number of research studies on RT for hybrid mold inserts is still lacking as compared to research studies on conventional manufacturing technology. One of the significant limitations is on the ways to improve physical and mechanical properties due to the limited type, size and shape of materials that are currently available. Originality/value This review presents the related information and highlights the current gaps related to this field of study. In addition, it appraises the new formulation of MEC materials for the hybrid mold inserts in injection molding application and RT for non-metal products.

UV curable urethane acrylate coatings formulation: experimental design approach

2014 ◽  
Vol 43 (2) ◽  
pp. 61-68 ◽  
Author(s):  
Ghodsieh Mashouf ◽  
Morteza Ebrahimi ◽  
Saeed Bastani
Keyword(s):  
Mechanical Properties ◽  
Experimental Design ◽  
Physical And Mechanical Properties ◽  
Scratch Resistance ◽  
Urethane Acrylate ◽  
Uv Curable ◽  
Content Type ◽  
Mathematical Equations ◽  
Acrylate Monomers ◽  
Mixture Experimental Design

Purpose – The purpose of this work was to perform a systematic study on the effect of formulation on the physical and mechanical properties of ultaviolet (UV) curable urethane acrylate resins. In addition, the authors wanted to derive mathematical formula for the prediction of physical and mechanical properties for the aforementioned system. Design/methodology/approach – The experiments were carried out based on mixture experimental design to determine the effect of different multifunctional acrylates (i.e. 1,6-hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), trimethyolpropane triactylate (TMPTA)) concentration on the physical and mechanical properties of a UV curable polyurethane acrylate system. The urethane oligomer was synthesized and characterized by the research team. Microhardness, adhesion strength and scratch resistance of the cured films were evaluated as the physical and mechanical properties. Findings – The results revealed that the resin and TMPTA concentrations had the most significant effects on the microhardness property. Adhesion strength of the films showed a linear trend with respect to all variables. Moreover, all components also had a significant and complex influence on the scratch resistance of the cured systems. In addition, mathematical equations proposed by mixture experimental design were derived for all the mentioned properties. Research limitations/implications – Other multifunctional acrylate monomers (i.e. more than three functional) can be used in the formulations. The kinetics of the curing can affect on the network formation and consequently on the properties of the cured films. Practical implications – The obtained results can be used by the researchers who are active in the field of structure-property relationship of polymers and surface coatings. The reported data and the mathematical equations can also be used for the formulating of an appropriate formulation based on a specific application. Originality/value – A systematic and statistical-based approach, i.e. mixture experimental design, was used to evaluate the effect of formulation on some of the properties of a UV curable polyurethane acrylate system. A urethane oligomer and three different multifunctional acrylate monomers as reactive diluents were used in the formulations. Noteworthy to mention that several mathematical models were derived by using analysis of variance for the prediction of the properties studied in this system.

scholarly journals Impact of filament denier on functional performance of microfiber in situ bags

2020 ◽  
Vol 43 ◽  
pp. e50856
Author(s):  
Doaa Elgohary Hanafy ◽  
Dina Mohamed Hamoda ◽  
Ibrahim Mohamed Khattab ◽  
Ahmed Abdelkader Aboamer
Keyword(s):  
Mechanical Properties ◽  
Dry Matter ◽  
Fine Particles ◽  
Functional Performance ◽  
Physical And Mechanical Properties ◽  
Before And After ◽  
Ruminal Degradability ◽  
Radar Chart

In situ bags made from microfiber fabrics have a greater surface area and filtration efficiency that retains the fine particles and reduce the variation in the results. Also, it is more durable than that made from traditional fabrics. This work aimed to study the effect of filament denier on the performance of in situ bags. Two polyester microfilaments with 0.4 and 0.7 deniers were used in manufacturing of four fabrics. Physical and mechanical properties of manufactured fabrics were measured before and after incubation to show the efficiency of the manufactured samples. In vitro trail was conducted to estimate ruminal degradability after 24 and 48 hours for three feedstuffs using three cannulated rams as replicates. The mechanical properties of manufactured in situ bags were significantly affected with both denier per filament and weft densities. According to the statistical analysis of radar chart, sample 2 remarked the highest value which achieved the acceptable ruminal dry matter disappearance compared with Ankom bags in different incubation times.

scholarly journals WOODWORKING IN THE NORTHERN BUKOVYNA DURING 12th — EARLY 13th CENTURIES

2020 ◽  
Vol 35 (2) ◽  
pp. 327-333
Author(s):  
I. P. Vozny
Keyword(s):  
Mechanical Properties ◽  
Economic Development ◽  
Middle Ages ◽  
Physical And Mechanical Properties ◽  
Archaeological Sites ◽  
Main Method ◽  
Fully Integrated ◽  
Drill Bits ◽  
Long Time ◽  
Technical Properties

The article deals with the development of woodworking industry in the medieval settlements of Northern Bukovyna which for a long time remained poor studied. During the Middle Ages this territory was covered with significant forest areas, in which there were 22 local breeds of both industrial and rare trees. Accordingly, the woodworking industry here, as well as throughout the territory of Old Rus, had many branches. Being well acquainted with the technical properties of wood the local masters widely used this knowledge depending on the physical and mechanical properties of the breed. Constructing fortifications they used mainly oak and beech, for residential and commercial buildings they used pine and fir. Hardwood (maple, ash) was spread in manufacturing of dishes, while spoons were made from the yarrow, juniper. The remains of precise or carved wooden dishes were discovered in the settlements of Northern Bukovyna. Beech and oak were used in the craft. Containers were made from lime to store loose materials. Local carpenters were aware of various ways of connecting individual wooden elements to each other in a particular product or construction. When erecting dwellings or household structures in corners, the main method was to connect the locks, and when connected horizontally, direct, overhead, spit joints were widely used. At the archaeological sites of Northern Bukovyna, as the open settlements were almost not explored, considerable woodworking toolkit was discovered. It is represented as forms and fragments of blades, ax, bits, drill bits, knives, nail, etc. Their typology has wide analogies among archeological materials from other territories of the Old Rus state and is fully integrated into the generally accepted typology. Thus, materials that characterize the woodworking industry of Northern Bukovyna completely allow trace the evolution of the woodworking business, which developed in terms of economic development of Old Rus.

The influence of the 3D-printing technology on the physical and mechanical properties of polyphenylene sulfone

2018 ◽  
Vol 24 (7) ◽  
pp. 1124-1130 ◽  
Author(s):  
Azamat Ladinovich Slonov ◽  
Azamat Askerovich Khashirov ◽  
Azamat Aslanovich Zhansitov ◽  
Elena Viktorovna Rzhevskaya ◽  
Svetlana Yuryevna Khashirova
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
3D Printing ◽  
Impact Strength ◽  
Orientation Angle ◽  
Physical And Mechanical Properties ◽  
Air Gap ◽  
Content Type ◽  
Fused Deposition ◽  
The Impact

Purpose This paper aims to examine the impact of three-dimensional (3D) printing technological modes (using fused deposition modelling [FDM]) on physical and mechanical properties of samples from polyphenylenesulfone. Design/methodology/approach For this study, the standard test samples were printed using the FDM method at different filament orientation angles, the gaps between them and a different width. The basic physical and mechanical properties, such as the strength, the elastic modulus and the impact strength, were studied. Findings The authors found that the basic mechanical properties strongly depend on the printing settings. In particular, the elastic modulus generally depends on the air gap between rasters, and it is practically independent of the filament orientation angle. In contrast, the impact strength depends on the orientation and the degree of adhesion between filaments: the highest values are reached at the longitudinal orientation of rasters in the sample (0°) and the minimum value of the air gap (−0.025 mm). However, in selecting the optimal mode of 3D printing, it is necessary to take into account the specific geometry of the printing products and the direction of the stress that it will experience. Originality/value The paper presents the results of the investigation of the influence of FDM printing modes on the mechanical properties of samples from polyphenylenesulfone, including impact strength. The authors studied the mechanisms of the destruction under impact loading and revealed the optimal printing settings for making samples with properties which are not inferior to the injection molded samples.

Analysis of the Influence of the Basis Weave Structure on Physical and Mechanical Properties of Plush Knitwear

2021 ◽  
pp. 110-113
Author(s):  
M.S. Karatayev ◽  
S.Sh. Tashpulatov ◽  
U.S. Rakhmatullaeva ◽  
D.Kh. Yakhyaeva ◽  
N.D. Abdurakhmanova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Weave Structure

scholarly journals DEVELOPMENT OF ECO-FRIENDLY WATER-DISPERSION PAINT BASED ON POLYVINIL ACETATE DISPERSION

2019 ◽  
Vol 4 (3) ◽  
pp. 15-21
Author(s):  
Виктор Соков ◽  
Viktor Sokov ◽  
Софья Баженова ◽  
Sof'ya Bazhenova ◽  
Максим Петров ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mass Fraction ◽  
Applied Research ◽  
Polyvinyl Acetate ◽  
Physical And Mechanical Properties ◽  
Water Dispersion ◽  
Long Time ◽  
Environmental Requirements ◽  
Weather Resistance ◽  
Polyvinyl Acetate Dispersion

Interior paint is important for interior decorating; this is followed by a long time working with the col-oring material and a constant stay in rooms with the paint. Unfortunately, not all paints provide com-fortable and safe use. This article presents the development of eco-friendly water-dispersion paint based on polyvinyl acetate dispersion. This paint provides protection from carcinogenic, mutagenic and toxic effects. The main environmental requirements set by the standards are considered; the con-tent of substances in the paint that harms people is monitored. The influence of some paint compo-nents on person’s functionality and the possibility of their replacing without quality reduction is dis-closed in the paper. The main physical and mechanical properties such as conditional viscosity, densi-ty, mass fraction of nonvolatile substances, coating adhesion, milling degree, resistance to static ac-tion of water and weather resistance are determined. Attention is paid to the applied research meth-ods. As a result of testing, a water-dispersion paint with high technical characteristics is obtained. It can be used in all types of buildings and structures and be recommended for children's, medical and preventive institutions.

Effects of calcium leaching on the physical and mechanical properties of aerial lime-cement mortars

2019 ◽  
Vol 17 (3) ◽  
pp. 649-666
Author(s):  
Soufyane Bellifa ◽  
Nadir Boumechra
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Calcium Hydroxide ◽  
Nitrate Solution ◽  
Physical And Mechanical Properties ◽  
Rate Of Change ◽  
Content Type ◽  
Calcium Leaching ◽  
Ammonium Nitrate Solution ◽  
Cement Mortars

Purpose This paper aims to assess the effects of chemically accelerated leaching on the physical and mechanical properties of aerial lime–cement mortars (LCMs). Design/methodology/approach Two aerial LCMs, differencing mainly in their calcium hydroxide content, were degraded by the use of an ammonium nitrate solution as a leaching agent. The leaching effects were studied by evaluating the rate of change in physical (sorptivity and mass loss) and mechanical (flexural and compressive strength) characteristics of aerial LCMs. To quantify the evolution and kinetics of degradation, the leached depth was then characterized at different levels of degradation by means of a phenolphthalein solution. Findings The experimental results showed that the dissolution of binder decreases the mass, alkalinity and strength of aerial LCMs but increases their sorptivity. A linear relationship was derived by plotting the values of leached depth against the square root of immersion time in an aggressive solution. It was found that the leached depth followed diffusion-controlled kinetics. Originality/value It was found that the global loss of compressive strength of aerial LCMs because of complete dissolution of calcium hydroxide can reach up to 80 per cent.

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