Engineering of surface properties of polypropylene nonwovens through oxygen plasma for enhanced color yield of pigment prints

2019 ◽  
Vol 49 (2) ◽  
pp. 127-135
Author(s):  
Amjed Javid ◽  
Awais Irshad ◽  
Munir Ashraf ◽  
Abdur Rehman ◽  
Shagufta Riaz ◽  
...  
Keyword(s):  
Oxygen Plasma ◽  
Flexural Rigidity ◽  
Surface Characteristics ◽  
Color Fastness ◽  
Color Strength ◽  
Content Type ◽  
Nonwoven Fabrics ◽  
Moisture Management ◽  
Management Capability ◽  
Bending Length

Purpose This paper aims to evaluate the effect of plasma treatment on the performance and color strength of pigment printed polypropylene nonwovens fabrics. Design/methodology/approach Melt spun nonwoven fabrics have been treated with plasma discharge using oxygen as a reactive gas to activate their surfaces for better interfacial interactions. The untreated and plasma treated fabrics are printed using pigment print pastes to investigate the print properties of nonwoven fabrics that are correlated to surface characteristics. The printed fabrics are characterized through FTIR, color fastness to washing and rubbing, flexural rigidity and moisture management observations. Findings The fabrics treated with oxygen plasma exhibited higher wettability, higher overall moisture management capability, enhanced color strength and superior color fastness to washing. However, bending length and flexural rigidity have been increased. Originality/value This study offers promising findings regarding the surface activation of polypropylene nonwovens for enhanced performance, comfort and color fastness characteristics.

Optimization of the color fastness and mechanical properties of pigment dyed PC fabric

2018 ◽  
Vol 47 (5) ◽  
pp. 396-405
Author(s):  
Abdul Azeem ◽  
Sharjeel Abid ◽  
Noman Sarwar ◽  
Shahzaib Ali ◽  
Ahsan Maqsood ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Design Methodology ◽  
Industrial Process ◽  
Color Fastness ◽  
Content Type ◽  
Washing Fastness ◽  
Market Values ◽  
Dyed Fabrics ◽  
Bending Length ◽  
Practical Implications

Purpose The purpose of this study is to improve the mechanical properties and reduce the stiffness/harshness of fabric associated with the pigment dyeing of textiles. Design/methodology/approach The fabric was pigment dyed with the addition of three different softeners and binders. The fabric was then analyzed to have improved textile properties by measuring tear strength, bending length, crocking and washing fastness tests. Findings The conventional route of pigment dyeing (without any softener) imparted poor mechanical and rubbing fastness. The softener-added recipe provided better mechanical, rubbing and washing fastness, and the stiffness values were oppressed as well. Practical implications Because of reduced stiffness, increased fastness and mechanical properties, the use of softener with pigment dyeing can improve the market values and satisfaction of the dyed fabrics. The finished product would also have better life and endurance. The process can be modified easily to have a better end-product with a negligible cost addition in industrial process, as softeners are cheap and used in low (10-20 g/l) in industrial settings without affecting the required shades. Originality/value This is the first report, to the best of the author’s knowledge, on the optimization of pigment dyeing of PC fabric with the addition of Helizarin and perapret softeners in dyeing bath.

Plasma activation and chitosan attachment on cotton and wool for improvement of dyeability and fastness properties

2020 ◽  
Vol 49 (6) ◽  
pp. 483-489
Author(s):  
Aminoddin Haji
Keyword(s):  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Cotton Fabrics ◽  
Metal Salts ◽  
Cotton Fibers ◽  
Oxygen Plasma Treatment ◽  
Synthetic Dyes ◽  
Fastness Properties ◽  
Color Strength ◽  
Content Type

Purpose The dyeing of cellulosic and proteinous fibers with natural and synthetic colorants usually needs large amounts of metal salts to promote the dyeing procedure. To get rid of the necessity to use metal salts, plasma treatment and subsequent attachment of chitosan biopolymer were considered as green processes for surface functionalization of wool and cotton. The purpose of this paper is to investigate the effect of oxygen plasma treatment and attachment of chitosan on the dyeability of wool and cotton fabrics using walnut and weld as model natural dyes, as well as C.I. reactive blue 50 and C.I. acid blue 92 as model synthetic dyes. Design/methodology/approach Wool and cotton fabrics were modified with oxygen plasma and coated with chitosan solution. The un-modified and modified samples were dyed with the above-mentioned dyes under constant conditions. The color strength, color coordinates and fastness properties of the dyed samples were determined and compared. Findings The results showed that oxygen plasma treatment could improve the dyeability and fastness properties of wool and cotton fibers when dyed with all of the above-mentioned dyes. Attachment of chitosan to the plasma-treated samples significantly improved the dyeability of wool and cotton fibers with walnut, acid and reactive dyes. The fastness properties of the dyed samples were enhanced by plasma treatment and chitosan coating. Originality/value This study uses plasma treatment as an environmentally friendly pre-treatment for attachment of chitosan on wool and cotton. This process improved the dyeing properties of both fibers. The use of metal salts in not needed for dyeing of wool and cotton according to the investigated process.

Application of ANN and ANFIS in prediction of color strength of plasma-treated wool yarns dyed with a natural colorant

2020 ◽  
Vol 49 (3) ◽  
pp. 171-180 ◽  
Author(s):  
Aminoddin Haji ◽  
Pedram Payvandy
Keyword(s):  
Plasma Treatment ◽  
Flow Rate ◽  
Oxygen Plasma ◽  
Correlation Coefficients ◽  
Oxygen Flow Rate ◽  
Oxygen Flow ◽  
Color Strength ◽  
Treatment Variable ◽  
Content Type ◽  
Natural Dyeing

Purpose Despite the increasing popularity of natural dyeing of textiles, the low substantivity between the fibers and the natural dyes is a problem. Several methods have been used to overcome this problem. In this study, wool fibers were pretreated with oxygen plasma under different conditions and dyed with the extract of grape leaves. The purpose of this study is to investigate the effects of plasma treatment parameters on the color strength of the dyed samples using artificial neural network (ANN) and adaptive neuro-fuzzy inference system (ANFIS) and evaluate the ability of these methods for predicting the color strength. Design/methodology/approach Woolen yarns were modified under different conditions of oxygen plasma treatment. Oxygen flow rate, power and time were considered as the treatment variable factors. Plasma-treated samples were dyed under constant conditions with the extract of grape leaves as a natural dye. ANN and ANFIS were applied to model and analyze the effect of plasma treatment parameters on the color strength of the dyed samples. Findings The results showed that increasing all the plasma treatment process variables, including oxygen flow rate, power and time increased the color strength of the dyed samples. The results showed that the developed ANN and ANFIS could accurately predict the experimental data with correlation coefficients of 0.986 and 0.997, respectively. According to the obtained correlation coefficients, ANFIS had a higher accuracy in prediction of the results of this study compared with the ANN and RSM models (correlation coefficient = 0.902, from our previous study). Originality/value This study uses ANN and ANFIS for predicting color strength of naturally dyed textiles for the first time. The use of computational intelligence for the optimization and prediction of the effects plasma treatment for the improvement of natural dyeing of wool is another novelty of this study.

scholarly journals Dyeing of Silk Fabric with Soaked Phaseolus Vulgaris (Red kidney bean) Extract

2020 ◽  
Vol 06 (9S) ◽  
pp. 83-88
Author(s):  
Debjit Biswas, Goutam Bar
Keyword(s):  
Phaseolus Vulgaris ◽  
Flexural Rigidity ◽  
Synthetic Dyes ◽  
Silk Fabric ◽  
Color Strength ◽  
Kidney Beans ◽  
Red Kidney Beans ◽  
Different Color ◽  
Dyed Fabric ◽  
Bending Length

With the rising awareness of sustainability, eco-friendly dyes are preferred over synthetic dyes and chemicals. In our day-to-day life, many natural ingredients have colorant substances but are discarded without efficient use. Similarly, the seeds of Phaseolus vulgaris (Red Kidney Beans) release colorant substances when soaked in water or boiled, but the water is drained out or discarded. The present work aimed to utilize the above extract in a sustainable way. So, an attempt is made to dye the silk fabric with the colorant extract with various mordants at different temperatures. The colorant was extracted by soaking Red Kidney Beans for 3 hours and further boiling it for 20 minutes at 100ºC. Degummed and bleached Mulberry silk fabric was dyed with the colorant extract at 90-95ºC and pH [3, 3.5, 4, 4.5, 5, 5.5] for 45 minutes. Dyed fabric samples were tested for color strength using color i7 Spectrophotometer. Also, the dyed fabric samples were tested for different color fastness properties (colourfastness to washing, water, rubbing, light etc.) and mechanical properties (thickness, bending length, flexural rigidity, crease recovery). Satisfactory results were found. Thus, the implications of the research show a promising future for dying of silk fabric with a sustainable approach.

Forearm test for disposable antibacterial foot sweat pads

2016 ◽  
Vol 28 (3) ◽  
pp. 300-310 ◽  
Author(s):  
Sibel Kaplan ◽  
Selcuk Aslan
Keyword(s):  
Design Methodology ◽  
Antibacterial Agents ◽  
Absorption Capacity ◽  
Content Type ◽  
Nonwoven Fabrics ◽  
Moisture Management ◽  
Transfer Characteristics ◽  
Significant Relationships ◽  
Liquid Absorption ◽  
Constant Period

Purpose – The purpose of this paper is to obtain thermal sensations arise during skin-antibacterial modified foot sweat pad contact by subjective forearm test carried out on 14 males. Design/methodology/approach – Sweat pads were designed for the foot and topsheet layers, constituting of polypropylene (PP) or polylactic acid (PLA) nonwoven fabrics, were modified by herbal antibacterial agents (cinnamaldehyde, geraniol, phenylethyl alcohol). Antibacterial agents were applied directly or within polymers which prepared by three different polymerization methods. Dry and wet pads (including water 50 percent of absorption capacity) were placed on the forearms of the subjects for a constant period under controlled environmental conditions. Liquid absorption and transfer characteristics of the topsheet layers were measured by standard methods (drop, absorption capacity, wetback tests) and moisture management tester parameters. Subjective coolness and dampness sensations arise during first touch of the pads were gathered and results were discussed according to liquid absorption and transfer characteristics of the sweat pads which differ according to topsheet fabrics and different antibacterial treatments. Findings – The paper showed that, direct or polymerization-based antibacterial applications created significantly different coolness and dampness sensations when compared with raw PP and PLA fabrics. Significant relationships were obtained between coolness sensation and both dampness sensation and absorption capacity results. Originality/value – Forearm test is normally applied on standard fabrics but in this study, it was applied on a disposable product which is used within foot clothing system.

Polyurethane based finishing of cotton fabric for imparting multifunctional properties by using central composite design

2016 ◽  
Vol 45 (6) ◽  
pp. 444-449
Author(s):  
Zulfiqar Ali Raza ◽  
Aisha Rehman ◽  
Rashid Masood
Keyword(s):  
Tensile Strength ◽  
Central Composite Design ◽  
Strength Loss ◽  
Content Type ◽  
Moisture Management ◽  
Durable Press ◽  
Management Capability ◽  
Parabolic Relationship ◽  
Recovery Angle ◽  
Central Composite

Purpose The purpose of this study was to overcome discomfort associated with it, a resin finish was applied in conjunction with hydrophilic polyurethane. Design/methodology/approach The process variables included concentrations of polyurethane and resin finishes, and pH under central composite design (CCD). The fabric specimens were assessed for crease recovery angle (CRA), tensile strength and moisture management properties. Findings Some models were developed for prediction of CRA and overall moisture management capability (OMMC) of treated fabric. It was observed that polyurethane concentration showed a parabolic relationship with CRA and a direct relationship with OMMC, whereas resin concentration showed a parabolic relationship with CRA and an inverse relationship with OMMC. Increase in pH from acidic to alkaline resulted in a decrease in CRA but an increase in OMMC. The untreated specimen had the highest tensile strength, whereas the specimen treated with polyurethane showed the least tensile strength loss, and the one treated with resin showed the highest loss in tensile strength. Practical implications As the polyurethane-based finish is soft and hydrophilic, so it was expected that it would overcome the uncomfortable feature of durable press finish, and with its flexibility, the strength losses might reduce. Originality/value This is the first report about the investigation of effects of increasing flexibility of the cross-link by incorporating polyurethane compounds into a typical dimethylol dihydroxy ethylene urea durable press resin formulation.

Rendering viscose fabric dye-able with anionic dyes using plasma treatment technique and chitosan nanoparticles as an eco-friendly approach

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Khaled Mostafa
Keyword(s):  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Chitosan Nanoparticles ◽  
Oxygen Plasma Treatment ◽  
Treatment Technique ◽  
Fastness Properties ◽  
Acid Dyes ◽  
Color Strength ◽  
Anionic Dyes ◽  
Content Type

Purpose This paper aims at studying the oxygen plasma treatment and the previously prepared and fully characterized chitosan nanoparticles (CNPs) as a green and eco-friendly strategy for surface modification of viscose fabric. This was done to render viscose fabric dye able with two types of acid dyes that do not have direct affinity to fix on it via improving the fabric wettability. Design/methodology/approach To achieve the goal, viscose fabric was activated with oxygen plasma at optimum conditions and coated with different concentrations of CNPs solution via conventional pad dry cure technique. The untreated and plasma-treated fabrics with CNPs were dyed with two types of acid dyes, namely, Acid Orange 7 and Methyl Red under determined conditions. The color strength (K/S), fastness properties to light, rubbing and perspiration, add on %, tensile strength, wettability and durability of the dyed samples were determined and compared. Findings The results divulged that oxygen plasma-treated fabric with CNPs and the aforementioned dyes in question could improve the flowing properties in comparison with untreated fabric: (a) the fabric wettability expressed as wetting area mm2; (b) the dye ability and fastness properties of viscose fabrics expressed as K/S and fastness properties; and (c) the strength properties and add on % of the treated fabric. On the other hand, the durability of the plasma-treated fabric decreased with increasing washing cycles. Originality/value The novelty addressed here was using plasma treatment as an eco-friendly pre-treatment approach for attachment of CNPs as a multifunctional green bio-nano polymer onto viscose fabric, which improved the dyeing properties of the fabric with acid dyes that do not have direct affinity to fix onto it.

Multivariable Studies of Nonwoven Fabrics

1967 ◽  
Vol 89 (1) ◽  
pp. 1-10 ◽  
Author(s):  
S. C. Winchester ◽  
J. C. Whitwell
Keyword(s):  
Linear Density ◽  
Flexural Rigidity ◽  
Fiber Type ◽  
Bonding Temperature ◽  
Performance Characteristics ◽  
Nonwoven Fabrics ◽  
Bending Modulus ◽  
Dry And Wet Conditions ◽  
Bending Length ◽  
Staple Length

The performance characteristics of nonwoven fabrics have been studied as a function of fiber properties, binder properties, and web construction. The particular type of non-woven selected for study was a web of random-laid base fibers in which randomly placed thermoplastic fibers provide the bonds. The responses studied were those related to rupture, elastic, and handle (aesthetic) properties. Fourteen variables were investigated: Base fiber linear density, base fiber staple length, amount of crimp in base fiber, post-yield extension of base fiber, type of binder, linear density of binder, staple length of binder, binder concentration, mass per unit area of nonwoven, amount of needle looming, number of laminations per web weight, pressure of bonding, temperature of bonding, and time of bonding. The performance characteristics measured as a function of these variables were maximum tenacity at dry and wet conditions, elongation at dry and wet conditions, tear strength, abrasion resistance, elastic modulus at dry and wet conditions, proportional limit at dry and wet conditions, crease recovery, bending length, flexural rigidity, bending modulus, bulk density, and air permeability. Crimp, linear density, and staple length of the base fiber influence rupture, elastic, and handle properties, as expected. Binder properties, other than type, have no effect due to the destruction of the fiber in the bonding process. Bonding conditions, particularly pressure and temperature, are extremely influential in all types of properties. These variables govern the effectiveness of the bonds. Concentration of binder is extremely important to all types of responses since it governs the number and distribution of bonds. Needle looming affects only rupture properties.

scholarly journals Water Filtration Membranes Based on Non-Woven Cellulose Fabrics: Effect of Nanopolysaccharide Coatings on Selective Particle Rejection, Antifouling, and Antibacterial Properties

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1752
Author(s):  
Blanca Jalvo ◽  
Andrea Aguilar-Sanchez ◽  
Maria-Ximena Ruiz-Caldas ◽  
Aji P. Mathew
Keyword(s):  
Cellulose Nanofibers ◽  
Antibacterial Properties ◽  
Surface Characteristics ◽  
Water Filtration ◽  
Separation Performance ◽  
Nonwoven Fabrics ◽  
Filtration Membranes ◽  
Wide Range ◽  
Dry Conditions ◽  
Cellulose Fabrics

This article presents a comparative study of the surface characteristics and water purification performance of commercially available cellulose nonwoven fabrics modified, via cast coating, with different nano-dimensioned bio-based carbohydrate polymers, viz. cellulose nanocrystals (CNC), TEMPO-oxidized cellulose nanofibers (T-CNF), and chitin nanocrystals (ChNC). The surface-modified nonwoven fabrics showed an improvement in wettability, surface charge modification, and a slight decrease of maximum pore size. The modification improved the water permeance in most of the cases, enhanced the particle separation performance in a wide range of sizes, upgraded the mechanical properties in dry conditions, and showed abiotic antifouling capability against proteins. In addition, T-CNF and ChNC coatings proved to be harmful to the bacteria colonizing on the membranes. This simple surface impregnation approach based on green nanotechnology resulted in highly efficient and fully bio-based high-flux water filtration membranes based on commercially available nonwoven fabrics, with distinct performance for particle rejection, antifouling and antibacterial properties.

Linking authentic leadership and management capability to public hospital performance: the role of work engagement

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mohammed Aboramadan ◽  
Main Naser Alolayyan ◽  
Mehmet Ali Turkmenoglu ◽  
Berat Cicek ◽  
Caterina Farao
Keyword(s):  
Health Care ◽  
Work Engagement ◽  
Authentic Leadership ◽  
Hospital Performance ◽  
Public Hospitals ◽  
Mediation Effect ◽  
Leadership And Management ◽  
Content Type ◽  
Management Capability ◽  
The Impact

Purpose This paper aims to propose a model of the effect of both authentic leadership and management capability on hospital performance. This model proposes work engagement as an intervening mechanism between the aforesaid links. Design/methodology/approach Data were collected from 380 medical staff working in Jordanian Public hospitals and were analysed using the structural equation modelling analysis technique. Findings The results suggest that both authentic leadership and management capability have a positive effect on hospital performance. Although positive, the direct effect of management capability on performance was not significant. Furthermore, work engagement demonstrated to play a full mediation effect between management capability and hospital performance and a partial mediation effect between authentic leadership and hospital performance. Practical implications This study may be of use for public medical services providers in general and other services sectors in terms of the role authentic leadership and management resources can play in contributing to positive work-related outcomes at the individual and organisational levels. Originality/value Considering the mainstream literature in health-care management, to the best of the authors’ knowledge, this is the first study to date to integrate the impact of both authentic leadership and management capabilities in the public health-care sector. Further, the research model has not previously been introduced when taking into account the role that work engagement can play between the examined variables.

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