Papers by Keyword: Knitted Fabric

Abstract: Comfort, protection and similar characteristics, which have become imperative for the production of sportswear materials, constantly encourage the textile industry and researchers to search for new innovative solutions. Recently, there are three main areas that scientists focus on - comfort, functionality and aesthetic appeal of sportswear. For the purpose of this research, a set of novel yarns is selected and used to design knitted materials intended for the production of functional sportswear. In this paper the changes in the material properties due to the use of different novel yarn compositions are observed. Regarding the material properties, the mass loss due to the material abrasion, and water vapour transfer rate were measured and analysed. The results of the investigation indicated that the material with the lowest mass, thickness and densities (both horizontal and vertical) exhibit the lowest decrease of mass due to abrasion. The highest decrease of mass is confirmed for the most compact material composed of viscose, polyester standard and elastane. It was further confirmed that the highest water vapour transfer rate exhibits the material that has the lowest density.

Abstract: In this study the knitted fabric side of two leather substitute materials was analysed. The two synthetic leather material used are usually fabricated for the use as upholstery in the furniture and automotive industry. The first material has a polyurethane (PU) matrix and the second has a polyvininylchloride (PVC) matrix.The main analysis done in this study was the geometrical calculus of the yarn eye using different geometric models and the evaluation of the relative deformation in surface for a biaxial tensile loading (along the rows and the columns of the knitted fabric). Results show a relative deformation of 6.29% for the PU matrix material and a 9.41% relative deformation for the PVC matrix material.The main goal of this study was to obtain a better characterization of the materials studied in order to have indications based on loading conditions when using these materials in their different industrial application.

Abstract: This paper presents analytical and experimental procedures to evaluate the influence of knitted fabrics on the total hand value (THV) for women’s winter thin dress. We examined and compared its mechanical properties, such as tensile, shear, bending, compression, surface roughness and friction properties, measured by the Kawabata Evaluation System for Fabrics (KES FB-Auto), of knitted fabrics with different fiber compositions and different types of knitted structures. The obtained results showed that the knitted structures have significantly influenced on the total hand value (THV) whereas the fiber compositions have shown a less effect on (THV). The existing results prove that the evaluation by KES FB-Auto system has been more beneficial for its basic of mechanical and surface properties. Moreover, the results could be analyzed for its new designing patterns for a refined, comfortable stretch fit.

Abstract: A kind of conductive composite yarn was designed and manufactured, then the resistance-strain characteristics of the knitted fabric based on the conductive composite yarn were tested and analyzed. The result showed that the yarn has excellent elastic deformation, better conductive performance, and good spin ability. The relationship between tensile deformation and resistance complies with contact resistance theory, the increasing of the elongation, the decreasing of the resistance. The resistance-strain curve accords with quadratic model, but the curve is linear Approximation and highly sensitive for the stresses of 0—12%. The sensitive of the curve is affected by the twist of the conductive composite yarn, the smaller the twist, the higher the sensitivity.

Abstract: In order to develop flexible absorbing fabric, three kinds of 58.3tex Ni-Fe fiber blended yarn which Ni-Fe fiber content was 8.34%, 11.11% and 13.89% were spun successfully and fabricated to different kinds of fabrics according to mental fiber property and electromagnetic spreading regulation. The reflectivity of fabrics were measured by the means of "arch testing method" in the range of 2-18 GHz with the change of fabric specifications. The results showed that the reflectivity of laminated fabrics were better than designed knitted fabrics and woven fabrics, revealed that the nickel iron fiber content and fabric specifications had significant effects on absorbing property.

Abstract: Recently knitted fabrics with the characteristics of soft texture, good extensibility and wet and gas absorption performance have won favors of customers again. Since more and more customers are pursuing leisure, knitted fabrics are welcomed warmly [. Meantime, fur clothes have noble features and are closely with people. We can't deny that it is difficult to innovate on design. Also the exorbitant price also makes it hard to break traditional design style. Combination fur and knitted fabrics clothes offer a new design idea and has a promising market prospect.

Abstract: The warm-cool feeling of 8 kinds knitted fabrics was test by KES-F7, the subjective of warm-cool feeling was evaluated with hand touching by 30 female volunteers. The relationship between objective measurement and subjective evaluation was studied by the correlation analysis method. It is found that the transient heat conduction between the fabric and skin is influenced by the fiber composition and structure obviously. The surface properties and the parts of absorption and quick-drying property have an opposite correlation on the knitted fabric warm-cool feeling.

Abstract: Porous structure of fabric has a significant impact on the fabric functions such as air permeability, water transport and heat retention. In this article, six knitted fabrics with different blend ratio of cotton-like modified polyester fiber and cotton fiber were prepared. Pore sizes and its distribution of the fabrics were measured by CFP-1100-AI pore diameter tester. Porosity of the fabrics was obtained by three ways respectively, namely loop model method, image method and density method. The results show that the pore diameter of blended knitted fabrics presents an asymmetric distribution, that is, the smaller pores have a greater proportion to the total pores than larger pores. There exists an obvious diameter change in the pore size distribution which indicates the transition from intra-yarn pores to inter-yarn pores. Among the 3 test methods for porosity, the porosity obtained by the image method is much smaller than that of loop model method and density method, but its relationship to the fiber blending ratio is consistent with the variation law of fabric air permeability, which indicates intra-loop pores takes greater impact on air permeability of fabrics. The results of present study can play a theoretical guiding role in comfort property design and product development of cotton-like polyester fabrics.

Abstract: This experiment used PA6 anti-ultraviolet properties fabric which specifications were adding a content of 0.3% nanomaterial 70D/24F SD DTY and adding a content of 0.7% nanomaterial 70D/48F SD DTY as raw material. After weaving, we analysis the influence on dye concentration and postboarding process for anti-ultraviolet properties of PA6 knitted fabrics. The result shows that the more dye concentration increase, the better anti-ultraviolet properties of fabric raise and the higher temperature or the slower speed of the postboarding, the faster anti-ultraviolet properties of fabric decline.

Abstract: In this paper the compression behaviour after different pre-strain and different shear angle of steel and glass fibre knitted fabrics will be analysed. These types of materials are used during the production of automotive windshields and other glasses in a car. The production of a windshield involves a step whereby the glass is deformed to the desired shape by using a mould. It is important that during this forming step the glass is not damaged and that the optical quality of the glass falls within the specifications of the customer. A knitted steel fibre fabric covers the mould. Since this fabric comes in direct contact with the glass, it is a key factor that determines the quality of the formed windshield. Variation of the fabric thickness can affect the optical quality of the glass. Thus far fabric very often manufacturers operate on the basis of empirical trial and error results to design their products. The challenge of the present work is to establish an experimental procedure for identification of the material laws for knitted fabrics deformation resistance. The paper describes an experimental procedure for derivation of the fabric thickness dependence on its deformation, using biaxial tension, shear and compression tests. The compression tests are performed on an Instron mechanical testing machine. During the test, a load cell (1 kN) pushes down with a constant speed of 1 mm/min onto the sample, compressing it. The load cell is attached to a cylinder which has a diameter of 70mm. The knitted fabrics was tested in the relaxed state and after pre-tension on the biaxial tester with pre-strains of 5x5%, 10x10%, 15%x15%, 0x10%, 10x0%, 0x20%, 20x0% and they was also tested after different shear angle (5°, 10°, 15°, 25°). Difference of thickness of fabrics after pres-strain is till 90 µm and for 25°shear angle is about 30 µm. Acknowledgements The work was funded by the grant 631/MOB/2011 of the Polish Ministry of Science and High Education, with the support from K.U.Leuven and N.V. Bekaert S.A.