Double Jersey Fabrics Research Articles

Thermal resistance of double jersey fabric knitted by different yarn raw material

The research was carried out on five double jersey knitted fabrics, knitted from cotton, Viscose®, Tencel®, Modal® and polyester ring spun yarns finesses of 20 tex. A circular double bed knitting machine gauge of E17 with the same production parameters was used for knitting all the fabrics. A change in all knitted fabric structure parameters was reflected through fabric mass per unit area, which ranged from 142 g m−2 to 165 g m−2. The minimum and maximum knitted fabric mass per unit area difference is up to 16 %. The lowest thermal resistance have polyester, while the largest have cotton knitted fabric. Thermal resistance of cotton fabric is higher for 36.7 % related to polyester knitted fabric. Considering basic knitted fabric parameters, knitting with same constructional parameters but different yarn raw materials doesn’t provide knitted fabric with same mass per unit area or thickness, i.e. thickness factor. It can be concluded that beside basic knitted fabric parameters, yarn raw material influence on thermal resistance.

Impact of Different Water Repellent Finishes on Cotton Double Jersey Fabrics

This study demonstrated that the variation in physical and chemical performance on cotton double jersey knit fabrics was decided by the knit structure, water repellent chemicals types and their concentration. Here, two types of double jersey fabrics were treated with different types of water repellent chemicals at different formulations to evaluate the performance of water repellent finishes on knit fabrics properties. The levels of water repellency of the fabrics were assessed by AATCC 127 hydrostatic head test method and by ISO 4920:2012 spray rating test method. To evaluate the performance of water repellent finishes on knit fabric properties, GSM, bursting strength test according to ASTM (D 3786-87) method, air permeability, color fastness to wash, water, perspiration, chlorinated water and color fastness to rubbing with ISO method were done. The results showed that both physical and chemical properties of the finished cotton knits, depend to a great extent on knit structure, the water repellent finish type and concentration to obtain water repellent fabrics with desirable properties.

At the nano-level modified cotton knitwear prototype development

This article reviews efficiency of the fluorine, silica and zinc compounds containing textile coating conformity with the day-to-day wearing conditions of cotton knitwear used as the first level clothing to the wearer skin. Silica sol modified with the zinc acetate dehydrate was used for the weft knitted cotton single-jersey and double-jersey fabrics chemical modification. The experimental part of the presented research includes the evaluation of the fabrics structure characteristics, air and vapour permeability and water-repellent abilities. The wettability of cotton textiles were evaluated by the water contact angle before and after modification as well after hydrothermal treatment. Images of the obtained modified fibres surfaces analysed by scanning electron microscopy, and fibres surface chemical composition has been determined with dispersive X-ray analysis. Conformity of modified textiles properties important to the wearing comfort and the inserted additional functions determined by testing textiles “in vitro” verified “in vivo” in experimental wearing process where 100 volunteers of different professions had participated.

Relationship between bursting strength and ultraviolet protection property of 100% cotton-knitted fabrics

In this study, the effect of bursting strength of knitted fabrics in relation to ultraviolet protection was studied. Different knitting structures were investigated, which included single jerseys such as plain, pineapple, lacoste and other combinations of different knitting stitches of knit, tuck and miss as well as double-jersey fabrics of half Milano, full Milano, half cardigan, full cardigan, 1 × 1 rib and interlock. Experimental results show that when comparing different structures, the change in bursting strength with ultraviolet protection factor was found to be significant.

Vertical wicking behavior of knitted fabrics

Wicking describes the liquid transport behavior of fibrous assemblies and plays an important role in deciding the comfort characteristics of fabrics. The present manuscript describes the vertical wicking behavior of different knitted fabrics. The wicking measurement has been done using a prototype based on capacitance principle. The developed prototype is capable of measuring the rate and amount of liquid transport more precisely during wicking. Several weft knitted double jersey fabrics were produced using V-bed machine by changing material and machine parameters. Many variables, i.e., fiber type, machine gauge, number of yarn feed and presence of elastomeric yarn, were chosen for the experimental design. It has been found that these factors significantly affect the wicking in fabrics. Fabrics made up of cotton or viscose yarns were showing lower wicking rate compared to PET samples (p<0.01). The rate and amount of water rise also decreases for the fabric samples produced with increasing the machine gauge and the number of yarn feed in the V-bed machine (p<0.01). Incorporating elastomeric yarn in the knitted structure make the fabric structure relatively tighter and offer more drag to the water rise, and hence show poor wicking characteristics. The developed prototype could be further used to examine the influence of several other factors of the fabric structure on the wicking behaviour.

Mechanical Properties of Weft Knitted Fabrics in Fully Stretched Status along Courses Direction: Geometrical Model Aspect

Weft knitted fabric structures have got new application in the modern technical textile such as seat belt and packaging fabrics. The weft knitted fabric is applied for technical textiles commonly as composites to resist against tension along courses direction in jamming status. In this study, mechanical properties of weft knitted fabrics with different structures of single jersey and double jersey in fully stretched status of jamming were considered by geometrical modeling. Ultra high tenacity nylon 6.6 yarn was used in manufacturing of weft knitted fabrics. Consequently the tenacity of the sample fabrics is assessed by a tensile tester. Mechanical properties of the fabrics are compared with theoretical modeling. The results show that the weft knitted fabrics with Rib structure have a superior tenacity. Also, double jersey fabrics of Full Cardigan and Full Milano represent better mechanical properties in comparison with single jersey fabrics.

Çift Plaka Örme Yatak Kumaşlarının Nem Taşıma Özellikleri

Moisture transfer properties of fabrics are very important for thermal comfort of human body. To provide thermal balance, perspiration secreted from body should be transmitted to the atmosphere. The objective of this study is to analyze moisture transport behaviors of double jersey mattress ticking fabrics. In the experimental section drying time, vertical wicking and transfer wicking properties of cotton cotton, polyester polyester and viscose – viscose, cotton/polyester polyester double jersey fabrics mattress ticking fabrics are analyzed. According to test results the role of material and fabric structure variation on moisture transport behavior is evaluated.

Measuring and Fuzzy Predicting Total Handle from Selected Mechanical Properties of Double Weft-Knitted Fabrics

The mechanical and handle properties of three groups of double weft-knitted fabrics are measured using the KES-FB system. The double-jersey fabrics consist of double weft-knitted structures (knit, tuck, and welt stitches), and are further divided according to density and then fully relaxed. For hand measurements, seven principal physical and mechanical properties are selected (EMT, RT, RC, B, 2HG, w, MIU), which are related to four possible ways of deformation in double weft-knitted fabrics. The importance of their characteristics is deduced from a survey of a panel of thirty judges. Primary hand and total hand values from the KES-FB are analyzed and compared with our alternative simplified fuzzy total hand test result. The results from the new method for double weft-knitted fabrics provide experts with meaningful values in comparison with Ka wabata's total hand values.

The Handle of Double-jersey Knitted Fabrics Part I: Polar Profiles

The principal properties involved in evaluating handle subjectively are identified and quantitatively described. In addition, these properties are linked to known methods of measuring the various physical properties involved. A study of a small group of commercially manufactured double-jersey fabrics produced a method of recording results in the form of a polar diagram. This exercise indicated that the resulting profile could discriminate pictorially between fabrics that incorporated variations in fibres, yarn structure, fabric structure, and fabric geometry.

14—THE GEOMETRY, DIMENSIONAL PROPERTIES, AND STABILIZATION OF THE COTTON PUNTO-DI-ROMA STRUCTURE

Dimensional stability of cotton Punto-di-Roma double-jersey fabrics can be attained by either mechanical-relaxation techniques (consecutive laundering and tumble-drying cycles) or chemical treatments (fabric mercerization without tension). Both treatments cause large linear-dimensional changes (shrinkages) leading to the same final stable condition, that is, to a fixed structural-knitted-cell configuration, categorized by unique values of u c and u w. Although, for all practical purposes, the ultimate u-parameters are close to constants, u w is not entirely independent of fabric tightness (K)nor u c of fibre type. They are very similar to those parameters found for wool fabrics prevented from felting. Geometrical fabric thickness is significantly dependent on both the fabric tightness and fibre type. Fabric stabilization is also induced by dry-cleaning (consecutive cycles in perchloroethylene), but the final u c(DC)-parameter is not the same as that found after mechanical or chemical relaxation. The mean ...

23—THE SETTING OF KNITTED WOOL FABRICS IN THE EXTENDED STATE

Setting treatments known to be effective for woven wool fabrics were applied to pure-wool weft-knitted fabrics while they were held in the extended state. The fabrics, of plain, interlock, and bourrelet structures, were initially wet-relaxed and conditioned before treatment. The effectiveness of the treatments was assessed by steam- and wet-relaxation techniques. For the plain fabrics, even the most successful treatments were not capable of preventing most of the set from being lost during a single mild wash. On the other hand, about half the set imparted lo the double-jersey fabrics could be retained under the same conditions. A possible explanation for this difference is advanced, this being based upon the difference in the setting behaviour of fibres in torsion and in bending.