scholarly journals Solar Radiation Transmittance Characteristics of Textile Woven Fabrics suitable for Greenhouse covering Materials

2021 ◽  
Author(s):  
Amal Ray ◽  
Subrata Ghosh ◽  
Niranjan Bhowmick
Keyword(s):  
Tensile Strength ◽  
Polyester Fabric ◽  
Vital Role ◽  
Woven Fabrics ◽  
Rigid Plastic ◽  
Active Radiation ◽  
Plastic Materials ◽  
Short Service Life ◽  
Cultivation Process ◽  
Cladding Material

AbstractNowadays, greenhouse covering materials have a vital role in terms of a protective cultivation process. Many farmers use polyfilms, rigid or semi-rigid plastic panels, and glazing materials as greenhouse covering materials in the present scenario. However, these plastic covering materials are known for their high cost, short service life, and cause of harmful environment. Solar transmittance property is one of the main criteria for choosing any greenhouse covering materials. This study prepares various woven fabrics made of polyester, cotton, and polyester–cotton blend yarns. Their solar transmittance characteristic is analyzed to develop fabric and compare it with a polyethylene film already used as a greenhouse cladding material to substitute for plastic materials. The solar transmission of polyester fabric is achieved as high as 70% in the photosynthesis active radiation, suitable for a commercial greenhouse material. In addition, the polyester fabric has tensile strength and extension much higher than that of commercial plastic greenhouse material.

scholarly journals The influence of thermal fixation of interlining on the quality of woven clothing fabrics evaluated from the aspect of their electrical resistance

2020 ◽  
Vol 68 (4) ◽  
pp. 4-11
Author(s):  
Koviljka Asanović ◽  
Tatjana Mihailović ◽  
Mirjana Kostić ◽  
Iva Gajić ◽  
Aleksandra Ivanovska
Keyword(s):  
Electrical Resistivity ◽  
Ambient Air ◽  
Polyester Fabric ◽  
Woven Fabrics ◽  
Plain Weave ◽  
Weave Fabric ◽  
Polyester Fibers ◽  
Electrical Resistivities ◽  
Twill Weave

In this paper, the influence of thermal fixation of woven interlining on the quality of woven fabrics, evaluated from the aspect of their dc volume electrical resistivity, was investigated. The plain weave fabrics made from cotton, flax, viscose, polyester, and cotton/polyester blends and 3/1S twill weave fabric obtained from cotton and polyester fibers blend were investigated. A cotton fabric with a point-applied thermoplastic binder was used as an interlining. The obtained results showed that the dc volume electrical resistivity of fabrics is influenced by their chemical composition, type of weave, type of yarn, fabric density which is especially pronounced in the interlining, the process of thermal fixation of the interlining, and ambient air humidity. The thermal fixation of the woven interlining greatly reduces the dc volume electrical resistivity of polyester fabric (499 times in the warp direction and 860 times in the weft direction), and increases the resistivity of other fabrics in the range of 1.3 times for viscose fabric and fabric obtained from cotton and polyester fibers blend in plain weave to 3.9 times for twill weave fabric. Based on the conducted investigation, it can be concluded that the quality of the tested fabrics evaluated from the aspect of their electrical resistivities, was significantly improved in the case of polyester fabric i.e worsens in the other investigated fabrics after thermal fixation of the woven interlining.

Places and Causes of Mismanaged Plastic Materials in the Life Cycle of Flexible Plastic Packaging Based on Mechanical Recycling Context

2021 ◽  
Vol 888 ◽  
pp. 129-138
Author(s):  
Munzir Hadengganan ◽  
Djoko Sihono Gabriel
Keyword(s):  
Life Cycle ◽  
Plastic Material ◽  
Life Cycles ◽  
Plastic Waste ◽  
Production Cycle ◽  
Mechanical Recycling ◽  
Rigid Plastic ◽  
Plastic Packaging ◽  
Quality Degradation ◽  
Plastic Materials

Plastic waste has become a big issue in the world for its large amount of plastic waste in the sea. Most of the plastic waste is plastic packaging which consists of flexible and rigid plastic packaging. This research discusses flexible plastic packaging. Until now, most researches on the loss of plastic materials discuss how to manage plastic waste disposal once it has been used by community: only a few discuss production cycle: while none of them discusses flexible plastic packaging area. This research aims to examine the number of mismanaged materials throughout flexible plastic packaging life cycle using a combination of Material Flow Analysis (MFA) and Life Cycle Analysis (LCA). Based on the literature review, interviews and observations conducted by the author to all stakeholders in the life cycle of flexible plastic packaging, mismanagement of plastic material occurred in each cycle, mostly caused by quality degradation of flexible plastic that could cause plastic waste was not acceptable in the mechanical recycle. The results of this study show that: (1) mismanaged material occurred in all cycles throughout the life cycles of flexible plastic packaging, (2) quality degradation is the main caused of mismanaged material in several cycles, and (3) the mismanaged materials in the life cycle of flexible plastic packaging were 98.29%.

STUDY OF WRINKLE RESISTANT, BREATHABLE, ANTI-UV NANOCOATED WOVEN POLYESTER FABRIC

2016 ◽  
Vol 23 (03) ◽  
pp. 1650003 ◽  
Author(s):  
HAFEEZULLAH MEMON ◽  
SOHAIL YASIN ◽  
NAZAKAT ALI KHOSO ◽  
SAMIULAH MEMON
Keyword(s):  
Sol Gel ◽  
Polyester Fabric ◽  
Air Permeability ◽  
Woven Fabrics ◽  
Visual Appearance ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ftir Studies ◽  
Dispersion Of Nanoparticles

The multifunctional textiles are interesting areas to be researched on. In this paper, the effect of the fiber nanocoating on the wrinkle recovery, air permeability and anti-Ultraviolet (UV) property of different woven fabrics using sol–gel method has been studied. The sol–gel method has various advantages over other methods. Along with these properties, no change in visual appearance has also been discussed in this paper. The dispersion of nanoparticles of titanium was obtained into silica sol. The characterization of nanocoating was done using Field emission scanning electron micrograph (FESEM) and Fourier transform infrared spectroscopy (FTIR) studies. The fabric wrinkle recovery properties, air permeability and anti-UV performance were analyzed using three different immersion timings into the nanosol. The results revealed that both wrinkle recovery properties and anti-UV performance have increased with respect to immersing time of the nanocoating although a slight decrease in air permeability and whiteness index of the fabric was also observed.

Plastic flow in extrusion and drawing through conical and wedge-shaped dies: Prediction of central bursting

2006 ◽  
Vol 220 (8) ◽  
pp. 1201-1210 ◽  
Author(s):  
S N Samy ◽  
Ch A R Saleh ◽  
A R Ragab
Keyword(s):  
Experimental Data ◽  
Plane Strain ◽  
Deformation Zone ◽  
Hydrostatic Stress ◽  
Plastic Instability ◽  
Instability Criterion ◽  
Fracture Criteria ◽  
Rigid Plastic ◽  
Stress Criterion ◽  
Plastic Materials

In this article, the plastic flowfields for extrusion and drawing - for rigid plastic materials forced through conical and wedge-shaped dies - are analysed on the basis of Shield's work. A modification to Shield's analysis is developed to account for the redundant deformation. Solutions for axisymmetric and plane strain flows are given. The total forces estimated for both drawing and extrusion operations are compared favourably with available experimental data. On the basis of the present modified Shield's analysis, expressions for the stresses within the die are then derived. These expressions are then employed to predict central bursting by applying two fracture criteria, namely: the hydrostatic stress criterion and the plastic instability criterion. The deformation zone geometry criterion has also been used for comparison. The predictions fairly agree with the experimental results.

Effect of Elastane and Thread Density on Mechanical Attributes of Stretch Woven Fabric

2020 ◽  
Vol 7 (1) ◽  
pp. 21-30
Author(s):  
Fahmida Siddiqa ◽  
Md. Mahbubul Haque ◽  
Shamima Akter Smriti ◽  
Nawshin Farzana ◽  
Abu Naser MD. Ahsanul Haque
Keyword(s):  
Tensile Strength ◽  
Elastic Properties ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Number Of Factors ◽  
And Performance ◽  
Tearing Strength

Stretch woven fabrics continue to grow in popularity, offering superior elastic properties and comfort. However, there are a number of factors (e.g., elongation, recovery, growth, tensile strength, tearing strength, and shrinkage) that can affect the attributes and performance of stretch woven fabric. These were investigated in the present study in relation to different elastane content and thread density. Blended cotton woven fabrics containing an increased elastane content gave enhanced elongation and recovery, despite a decrease in thread density. The tensile strength, tearing strength, shrinkage, and fabric growth decreased when the elastane ratio increased, regardless of the decline in warp thread density.

Empirical modelling of tensile strength of woven fabrics

2008 ◽  
Vol 9 (2) ◽  
pp. 240-245 ◽  
Author(s):  
Abhijit Majumdar ◽  
Anindya Ghosh ◽  
Shib Sankar Saha ◽  
Ayan Roy ◽  
Subir Barman ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Woven Fabrics ◽  
Empirical Modelling

Buckle Propagation Analysis of Deep-Water Petroleum Transmission Pipelines with Axial Tension

2014 ◽  
Vol 1008-1009 ◽  
pp. 1134-1143 ◽  
Author(s):  
Sun Ting Yan ◽  
Yin Fa Zhu ◽  
Zhi Jiang Jin ◽  
Hao Ye
Keyword(s):  
Plastic Hinge ◽  
External Pressure ◽  
Isotropic Hardening ◽  
Rigid Plastic ◽  
Perfectly Plastic ◽  
Fitting Procedure ◽  
Plastic Materials ◽  
Buckle Propagation ◽  
Elastic Perfectly Plastic ◽  
Hinge Model

Quasi-static finite element simulation is carried out on buckle propagation phenomenon of offshore pipelines under external pressure. Arc-length method and volume-controlled static analysis by employing hydrostatic fluid element F3D4 are employed to calculate the steady buckle propagation pressure. After verifying the validity of numerical model, emphasis is on the influence of tension on propagation pressure considering isotropic hardening elastoplastic and elastic-perfectly plastic materials. Parametric study is conducted to include the effect of diameter-thickness ratio, after which two empirical equations are derived by curve fitting procedure. Finally, some comments on the results obtained through rigid-plastic hinge model are presented and a modified plastic hinge model including effect of material anisotropy is derived. The results can serve as a reference for more reasonable design of buckle arrestors.

Statistical Evaluation Tensile Properties of High-Density Polyethylenes

2012 ◽  
Vol 445 ◽  
pp. 213-218 ◽  
Author(s):  
Ahmet Koyun ◽  
Baris Koksal ◽  
Esma Ahlatcioglu ◽  
A. Binnaz Hazar Yoruc
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Tensile Test ◽  
Statistical Evaluation ◽  
Test Results ◽  
Plastic Materials ◽  
Service Conditions ◽  
End Use ◽  
Chain Lengths

The mechanical properties, among all the properties of plastic materials, are often the most important properties because virtually all service conditions and the majority of end-use applications involve some degree of mechanical loading [1]. In the present work three different commercial polyethylene materials are tensile tested at four or five different tensile rates and two or three temperatures. Tensile test results against tensile rate include stress at 0.5 % elongation, tensile strength, yield strength, modulus of elasticity, elongation at yield and % elongation are determined. It is concluded that the structure, chain lengths and branching rates of polymer matrix significantly effected tensile test curve characteristic.

Geometric Instabilities in Isotropic Plastic Solids Under Increasing Uniaxial Compression

1972 ◽  
Vol 39 (2) ◽  
pp. 431-437 ◽  
Author(s):  
J. B. Newman
Keyword(s):  
Shear Stress ◽  
Strain Hardening ◽  
Uniaxial Compression ◽  
Maximum Shear Stress ◽  
Three Dimensional ◽  
Rigid Plastic ◽  
Axisymmetric Mode ◽  
Plastic Materials ◽  
Compressive Flow ◽  
Shanley Theory

This analysis seeks three-dimensional instabilities of uniaxial compressive flow in isotropic, strain-hardening, rigid-plastic materials of the Mises and maximum shear stress types. No instabilities are found for Mises materials. Maximum shear materials display axisymmetric, “deflectional”, and “higher-order” buckling. For increasingly slender specimens, the deflectional buckling process merges into that of the Shanley theory. The axisymmetric mode raises the possibility that instabilities contribute to the double axial bulging of ductile compression specimens reported by Na´da´i.

Characterization of Friction Stir Welded Joints in TA15 Titanium Alloy Plates

2011 ◽  
Vol 138-139 ◽  
pp. 852-857
Author(s):  
Fei Fei Xie ◽  
Chun Ping Huang ◽  
Chun Lin Dong ◽  
Li Ming Ke
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
Welded Joints ◽  
Travel Speed ◽  
Flow State ◽  
Friction Stir ◽  
Β Phase ◽  
Transverse Tensile ◽  
Plastic Materials ◽  
Ta15 Titanium Alloy

Friction stir welding (FSW) was applied to TA15 titanium alloy plates. Welds were produced by employing rotational speed of 375rpm and a travel speed of 23.5mm/min.The microstructure and mechanical properties of friction stir welded joints were investigated. Flow pattern of the materials also were analysed. The stir zone (SZ) was characterized by α-phase and β-phase, but the size of the grain in the middle of the SZ was much finer than that of the upper. The interface between the base metal (BM) and SZ is associated with the flow state of the plastic materials. Results of transverse tensile test indicated that all the joints exhibited lower tensile strength than the BM, and the maximum tensile strength of the as-welded joint is about 97.6% of the average strength of the BM.

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