scholarly journals PERFORMANCE PROPERTIES OF KNITTED FABRICS PRODUCED FROM rPET AND COTTON/rPET BLENDED VORTEX AND RING YARNS

2021 ◽  
Vol 2021 ◽  
pp. 208-214
Author(s):  
A. Oruç ◽  
Y. Arıkan ◽  
E. İlanbey ◽  
K. Özşahin
Keyword(s):  
Dimensional Stability ◽  
Raw Materials ◽  
Global Climate ◽  
Point Of View ◽  
Packaging Materials ◽  
Knitted Fabrics ◽  
Performance Properties ◽  
Bursting Strength ◽  
Single Use ◽  
Textile Products

An awareness of environmental issues is crucial for textile engineering due to increasing consumption of textile fibres. In addition, levels of pollution are ever increasing due to single use polymeric packaging materials in our daily life. Single use polymeric packaging materials, such as PET beverage bottles, have impacts on the consumption of raw materials and energy, on the contamination of our water and atmosphere, on human health, on global climate change. In this point of view, the ability of the textile producers to recycle the disposed PET beverage bottles into textile products has a critical importance. In this study, performance properties of knitted fabrics produced from rPET and cotton/rPET blended vortex and ring yarns are investigated to figure out the reproducibility of environmentally friendly textile products. For this aim, 100% rPET, 50-50% rPET-Co and 50-50% VPET-Co yarns were produced by Vortex and Ring Spinning technologies with same yarn number as Ne 30/1. Then the knitted fabric samples were produced from these sample yarns and the fabrics were dyed. Dimensional stability, bursting strength and pilling resistance properties of the fabrics were examined. Dimensional stability properties of rPET used fabrics were found to be similar with the ones which VPET used. Pilling resistance and bursting strength of the sample fabrics were close to each other that rPET usage does not demonstrate any disadvantage. Consequently, rPET fibre usage instead of VPET fibre is found to be appropriate.

Retrospective analysis of developments on the use of sterilization packaging materials for medical devices (literature review)

2020 ◽  
pp. 27-40
Author(s):  
Galina Nikolaevna Melnikova ◽  
Keyword(s):  
Medical Devices ◽  
Chemical Nature ◽  
Raw Materials ◽  
Antimicrobial Properties ◽  
Barrier Properties ◽  
Packaging Materials ◽  
Different Types ◽  
Single Use ◽  
Manufacturing Technologies ◽  
New Generation

The article discusses issues related to the creation and use of packaging materials for different types of products, including those specially designed for placing medical devices in them, before sterilization. The changes taking place related to the improvement of the barrier properties of packages to extend the preservation period of sterility of medical devices (both new types and complex in design) sterilized by different methods are noted. It is shown how over the course of several years new materials have been developed, technologies/methods of processing and reprocessing of raw materials and materials have changed, which make it possible to obtain packaging materials of different chemical nature and properties. Changes in existing packages from traditional materials (metal) to of single-use sterilization packages of a new generation with improved manufacturing technologies that provide mechanical, barrier and antimicrobial properties of packages differing in types, sizes, material properties are noted. The priority in the use of packaging materials for medical devices remains for materials that meet the requirements of GOST ISO 11607 "Packaging for medical devices subject to terminal sterilization", since the standard imposes more stringent requirements for the execution of packaging materials.

Analysis of the performance properties of knitted fabrics containing elastane

2016 ◽  
Vol 28 (4) ◽  
pp. 463-479 ◽  
Author(s):  
Selin Hanife Eryuruk ◽  
Fatma Kalaoglu
Keyword(s):  
Air Permeability ◽  
The Body ◽  
Knitted Fabrics ◽  
Performance Properties ◽  
Content Type ◽  
Bursting Strength ◽  
Wear Comfort ◽  
Yarn Count ◽  
Apparel Production ◽  
High Level

Purpose – Knitted fabrics containing elastane provide high level of comfort and ease of usage because of the elastic and drape properties over the body. Knitted fabrics respond to every movement of the body and return back to its original shape easily so they are used widely for apparel production. The most important properties required from the elastic knitted garments are wear comfort, fit, breathability and durability. The purpose of this paper is to analyse the effect of elastane yarn count and ground yarn count on the performance properties of 12 single jersey knitted fabrics were analysed after dying. Design/methodology/approach – The research design for this study consists an experimental study. In all, 12 fabrics containing half plating and full plating elastane were produced using 30/1-40/1 Ne yarn counts. Bursting strength, stretch recovery, residual extension, air permeability, spirality and drape properties of fabrics were evaluated. Findings – As a result of study it was found a certain effect as the elastane amount and count changed. For all types of knitted fabrics, bursting strength values increased and fabric spirality values decreased as the elastane amount and elastane yarn count increased. Also it was found a significant relationship between elastane amount and count with air permeability, spirality, bursting strength and drape. Originality/value – As a result of the literature review, it was seen that the effects of elastane amount, elastane yarn count and fabric yarn count on the performance properties of knitted fabrics has not been studied broadly.

Improving Dimensional Stability of Cotton Knits through Resin Finishing

2014 ◽  
Vol 9 (3) ◽  
pp. 155892501400900 ◽  
Author(s):  
Faiza Safdar ◽  
Tanveer Hussain ◽  
Ahsan Nazir ◽  
Kashif Iqbal
Keyword(s):  
Dimensional Stability ◽  
Knitted Fabrics ◽  
Bursting Strength ◽  
Different Types

The aim of this study was to compare the effectiveness of three different types of resin finishes for improving the dimensional stability of 100% cotton honeycombed pique knitted fabrics. After application of each resin at five different concentrations, it was found that the fabric shrinkage could be effectively controlled by using a suitable type and concentration of the resin. However, the cellulose crosslinking by the resin resulted in some loss in the fabric bursting strength. In a second set of experiments, three different types of softeners were applied, at three different concentrations, in combination with the optimized type and concentration of the resin. It was found that the loss in fabric bursting strength due to cellulose crosslinking by the resin could be minimised with a suitable type and concentration of softener without any deterioration in the fabric pilling properties.

scholarly journals Effects of the Laundering Process on Dimensional and Physical Properties of Plain and Lacoste Fabrics Made from Modal/combed Cotton Blended Yarns

2017 ◽  
Vol 25 (0) ◽  
pp. 75-81 ◽  
Author(s):  
Ebru Çoruh
Keyword(s):  
Physical Properties ◽  
Dimensional Stability ◽  
Unit Area ◽  
Dimensional Change ◽  
Air Permeability ◽  
Knitted Fabrics ◽  
Bursting Strength ◽  
Expert Analysis ◽  
Fabric Weight ◽  
Loose Medium

In this study, dimensional and some physical properties of plain (single jersey) and lacoste knitted fabrics made from 50/50 modal/combed cotton blended yarns (tex 21 and 15) were investigated. Twelve weft knitted fabrics were produced with two different structures and three different densities (loose, medium, tight). For physical properties, the fabric weight per unit area, fabric thickness, bursting strength, air permeability and dimensional stability were evaluated. We focused on the dimensional stability properties of outwear knitted fabrics. The total dimensional change of the fabric’s dimensions and structural properties were measured and evaluated after ten washing cycles and then flat dried. The results show that the weight per unit area, thickness, air permeability and dimensional stability values are independent of the yarn linear density, fabric structure and fabric density. Statistically evaluated using Design Expert Analysis of variance (ANOVA) software 6.06., test results show that dimensional stability is mostly effective for the bursting strength, air permeability and fabric weight per unit area.

Calculation of the Glaze Recipe for Porcelain Feldspar Products Based on their Molecular Formula Rationalization

2008 ◽  
Vol 59 (2) ◽  
pp. 129-134
Author(s):  
Ion Teoreanu ◽  
Roxana Lucia Dumitrache ◽  
Stefania Stoleriu
Keyword(s):  
Raw Materials ◽  
Computer Programs ◽  
Point Of View ◽  
Raw Material ◽  
Easy Access ◽  
Molecular Formula ◽  
Design Equation ◽  
Material Sources

Any change of the raw material sources for glazes, economically, ecologically motivated, and also from the glaze quality point of view, is conditioned by the molecular formula rationalization and by the variation limits of the molecular formula, respectively. The proper glaze compositions are placed within their limit variation intervals with optimized processing and utilization properties. For this purpose, the rationalization criteria and procedures of molecular formulas are summarized in the present paper, as well as the results referring to their rationalization obtained in the authors� previous work. Thus, one starts from a base of raw materials that are selected, usable and also accessible for the design and producing of the glazes. On these bases the groundwork and the design equation for the glaze recipes are developed, exemplified for a single glaze. For an easy access to results, computer programs are used for an easy access to results.

scholarly journals Location of Biorefineries Based on Olive-Derived Biomass in Andalusia, Spain

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3052
Author(s):  
Diego Cardoza ◽  
Inmaculada Romero ◽  
Teresa Martínez ◽  
Encarnación Ruiz ◽  
Francisco J. Gallego ◽  
...  
Keyword(s):  
Rural Areas ◽  
Raw Materials ◽  
Value Added ◽  
Olive Tree ◽  
Point Of View ◽  
Industrial Wastes ◽  
Olive Pomace ◽  
Crop Fields ◽  
Lignocellulosic Feedstock ◽  
Olive Stones

A biorefinery integrated process based on lignocellulosic feedstock is especially interesting in rural areas with a high density of agricultural and agro-industrial wastes, which is the case for olive crop areas and their associated industries. In the region of Andalusia, in the south of Spain, the provinces of Jaén, Córdoba and Seville accumulate more than 70% of the olive wastes generated in Spain. Therefore, the valorisation of these wastes is a matter of interest from both an environmental and a social point of view. The olive biorefinery involves a multi-product process from different raw materials: olive leaves, exhausted olive pomace, olive stones and olive tree pruning residues. Biorefinery processes associated with these wastes would allow their valorisation to produce bioenergy and high value-added renewable products. In this work, using geographic information system tools, the biomass from olive crop fields, mills and olive pomace-extracting industries, where these wastes are generated, was determined and quantified in the study area. In addition, the vulnerability of the territory was evaluated through an environmental and territorial analysis that allowed for the determination of the reception capacity of the study area. Then, information layers corresponding to the availability of the four biomass wastes, and layers corresponding to the environmental fragility of the study area were overlapped and they resulted in an overall map. This made it possible to identify the best areas for the implementation of the biorefineries based on olive-derived biomass. Finally, as an example, three zones were selected for this purpose. These locations corresponded to low fragility areas with a high availability of biomass (more than 300,000 tons/year) in a 30 km radius, which would ensure the biomass supply.

Preparation of Alternative Hydraulic Binder Based on Secondary Raw Materials

2014 ◽  
Vol 1000 ◽  
pp. 12-15
Author(s):  
Jiří Švec ◽  
Tomáš Opravil ◽  
Jiří Másilko
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Construction Materials ◽  
High Volume ◽  
Point Of View ◽  
Hydraulic Lime ◽  
Combustion Gases ◽  
Secondary Raw Materials ◽  
Hydraulic Binder ◽  
Massive Scale

Reusing and recycling of secondary raw materials from high-volume industrial productions (especially form construction materials and binders fabrications) is very important way of conserving environment and it is also interesting from the economical point of view. The production of common hydraulic binders, especially Portland cement, burdens the environment with considerable amount of combustion gases and consumes energy in massive scale. Alternative (low – energy) binder can be used as Portland cement substitution in applications with lower mechanical properties requirements. Mined limestone wash sediments contain large amount of clay components, but there is also indispensable share of fine calcite. This composition makes these sediments a promising material for the preparation of hydraulic binders as Roman cement or hydraulic lime.

Development of Coolsmart Functional Knitted Fabrics

2012 ◽  
Vol 503-504 ◽  
pp. 498-502 ◽  
Author(s):  
Lan Qing Feng ◽  
Yan Jun Liu
Keyword(s):  
Pattern Formation ◽  
Moisture Absorption ◽  
Raw Materials ◽  
Knitted Fabric ◽  
Machine Code ◽  
Knitted Fabrics ◽  
Bacterial Function ◽  
Fabric Structures ◽  
Selection Of

Based on the main features of coolsmart fiber and the theory of knitted fabric structures， two structures of sports and leisure knitted fabrics with fast moisture absorption, description and anti-bacterial function are introduced in this article, detailing the selection of raw materials, pattern formation effect, the machine code organization and cam set out.

Assessment of the positions of the exporting countries of agri-food products on the world market according to their role in global value chains

2021 ◽  
pp. 8-14
Author(s):  
Elena Yu. Frolova ◽  
Keyword(s):  
Raw Materials ◽  
Action Plan ◽  
Value Added ◽  
Global Value Chains ◽  
World Market ◽  
Point Of View ◽  
Value Chains ◽  
Agricultural Exports ◽  
Export Policy ◽  
The World

The place in the rankings of agricultural exporting countries in world trade is estimated in terms of the volume of imports and exports of raw materials and food. However, to assess the efficiency of agricultural exports, it is important to analyze the value added of exported goods produced in the country. The position of the exporting country in global value chains is derived from the type of agricultural production, which in turn depends on the level of development of the national economy, the availability and breadth of use of modern high technologies. The article examines the concept of the development of world agriculture from the point of view of the formation of global value chains, set out in the report of the UN World Food Organization [1] in comparison with the political decisions of such countries as India and the People’s Republic of China in the development of agricultural and food exports. The paper analyzes the risks associated with the consolidation of developing countries as suppliers of agricultural raw materials, as well as the conditions and action plan that allow the country-exporter of agricultural raw materials to move to higher levels in the global value chains on the world market. This experience should be considered to make comprehensive and effective decisions on the formation of the export policy of agricultural products and food of the Russian Federation, considering the food security of the country.

Study of hydrogenation and corrosion of steel equipment and pipelines at the production facilities of H2S -containing hydrocarbon raw materials

2021 ◽  
pp. 170-181
Author(s):  
R. K. Vagapov
Keyword(s):  
Raw Materials ◽  
Strength Properties ◽  
Point Of View ◽  
Low Alloy Steels ◽  
Safety And Reliability ◽  
Alloy Steels ◽  
Steel Equipment ◽  
Equipment And Pipelines ◽  
Corrosion Of Steel ◽  
The Impact

The impact of hydrogen sulfide raw materials on steel equipment and pipelines is associated not only with corrosion processes, but also with the hydrogenation of used carbon and low-alloy steels. This can lead to the loss of their strength properties and the subsequent destruction of equipment operated under conditions of increased operating pressures. Such corrosive-mechanical effects associated with the penetration of hydrogen into steel are the most dangerous from the point of view of the safety and reliability of the operation of facilities for the production of hydrocarbon fluids. The effect of H2S on the main types of structural steels was investigated according to the results of autoclave tests. The formation of blistering (blistering) and cracks on the surface of steels due to the effect of hydrogen on the steel was recorded. A study of the phase composition of corrosion products and their possible effect on the processes of corrosion and hydrogenation of steel has been carried out.

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