Modal(木代尔)赛络纺系列产品开发

分析了Modal(木代尔)纤维的性能特点及传统纺纱的缺陷，提出通过细纱机进行赛络纺装置改造、赛络纺工艺调整及牵伸部件的选择，使Modal(木代尔)赛络纺系列纱线条干水平达到国内同行先进，取得明显经济效益。     

天然彩色棉绿色环保针织丝光面料

以天然彩色棉纱为原料，经针织、煮炼、除毛、丝光、固色和生态整理工艺过程，生产健康、环保针织丝光面料。     

银系抗菌剂及其在纺织材料中的应用

介绍了银离子的抗菌机理以及银系抗菌剂的种类,并在国内外最新研究进展的基础上展望其在纺织材料中的应用。     

Study of Yarn Snarling Part II: Mathematical Modelling

In the previous paper the experimental study of yarn twisting and snarling was reported and the application of theoretical criteria for predicting the critical parameters of snarling was discussed. This paper deals with modelling of snarling in textile yarns. The twisted textile yarn is modelled as an elastic rod subject to torque and tension. A unified model of snarling/kinking is developed which takes account of geometrical non-linearity. The sequential stages of loop/snarl formation and elimination are studied. The critical parameters of loop/snarl formation and elimination are obtained and the theoretical model compared with experimental results. The changes in yarn torsion, torque and tension which accompany loop formation and elimination are discussed.

The modelling results provide an insight into the snarling mechanism and can be used both to enhance efficiency of twisted yarn production by elimination of snarling and to simulate the fancy loop/snarl yarn appearance. The present model may serve as a basis to develop more sophisticated models.     

Prediction of optimum process parameters to achieve eco-friendly desizing of organic cotton fabrics with indigenously produced alpha-amylase and their enzyme kinetics

An attempt has been made to study the desizing of polyvinyl alcohol (PVA) starch-based organic cotton fabric using alpha-amylase enzyme with various process parameters such as enzyme concentration, temperature and reaction time. These process variables are selected based on the Box–Behnken design of experiment and the output of experiment resulted in weight loss of the fabric and their results are optimized with minimum error. The test results are analyzed using Design-Expert software 8.0 to predict the optimum process parameters to achieve the required desizing efficiency and their results are compared with actual trials. The alpha-amylase enzyme kinetics are studied at various concentrations, temperatures and reaction times to optimize the desizing process parameters. The performance of desizing was assessed by an iodine test and FTIR results to confirm the degradation of PVA starch in the desized organic cotton fabrics.     

Cotton fiber length distribution modality alteration in ginning and mill processing

Mechanical damage in cotton fiber processing both shifts the fiber length distribution and alters its shape. This leads to length distributions with complex shapes, often bimodal, that cannot be classified based on simple summary statistics. In this research, we quantified the distribution departure from unimodality and its alteration from the seed to the card sliver in order to determine where in the cotton process the complex bimodal shape appears, and to identify its potential sources of variability observed at the bale stage. Results presented in this paper indicate that bimodality is a transient state associated with intermediate fiber damage levels starting from the gin stand. The distribution is unimodal or shows a non-significant departure from unimodality at both the low and high damage levels, i.e. seed and card sliver, respectively. Fiber maturity plays a major role in determining the variability of the distribution modality at any processing stages. A mature cotton typically shows an extended intermediate damage state associated with a bimodal distribution, while an immature cotton will reach an advanced damage level from the early stages of mechanical processing, and thus will not exhibit the bimodality that is characteristic of an early/intermediate stage of the fiber breakage process.     

The influence of cyclic deformation on the strength and elongation at break of carded and combed wool yarns

There are various factors that influence yarn strength. Yarn breaking is due to fiber breakages and fiber’s slippages. In reality, a part of the fibers slip while the other part breaks. In this study, we have shown that fatigue yarn, resulting in a fundamental way impact on the number of breaks on the weaving machine, and sometimes on the physical properties of fabrics. Given the importance of the issue and the very limited directed research number in this direction, a tests series were carried out with the aim to highlight the changes to the physical characteristics of the yarn resulting from mechanical treatment comparable to that which they are subjected on the weaving machine. In the first part of our investigation, the residual deformation, tensile strength, and elongation at break of combed and carded threads were measured. In the second part, the influence of the extensions number, their amplitudes, and frequencies were analyzed. In order to examine the influence of these parameters, carded and combed yarns, with different characteristics were prepared. Therefore, based on the separate treatment results of three test series, it appears that: the warp yarns subjected to repeated extensions undergo the phenomenon of fatigue. Yarns fatigue reduces their elasticity and resistance and it is the cause for break yarn during weaving. The fatigue of wool yarns is very low compared to other textile materials.     

The effect of different knitted fabrics’ structures on the moisture transport properties

In this study, fabrics with different plain, tuck and float stitch combinations in three different tightness levels as tight, medium and loose are produced from combed ring spun cotton yarn. It is aimed at determining the effect of fabric structure on liquid absorption, transport and permeability properties, which are important factors in the people’s perception of wear comfort. The air permeability, wicking ability and moisture management measurements of the produced fabrics are made. It is determined that the increase in the fabric tightness decreases the air permeability and increases the wicking ability especially in 60?min measurements. The fabric tightness has also different effects on different knitting types in terms of moisture management properties. It is observed that structures with float stitches show high wicking ability and moisture management properties in terms of plain, tuck and float stitches combinations.     

Effect of blend proportion on moisture management characteristics of bamboo/cotton knitted fabrics

This study reports an investigation of the effect of the blend-ratio of bamboo and cotton fibres on the moisture management properties of single jersey knitted fabrics composed of them. The moisture management properties of the fabrics were measured in SDL-ATLAS moisture management tester. The liquid transport properties of textiles, such as wetting time, maximum moisture absorption rate, maximum wetted radii, spreading speeds, cumulative one-way transport capacity and overall moisture management capacity (OMMC), have been considered and correlated to the blend ratio of bamboo/cotton yarn single jersey knitted fabrics. It was observed that as the bamboo content increased, the wetting time decreased, maximum wetted radius decreased, rate of absorption increased, spreading speed decreased and OMMC decreased.     

Geometrical and mechanical properties of a non-crimp fabric applicable for textile reinforced concrete

Nowadays, non-crimp fabrics (NCFs) are extensively employed in many applications like textile reinforced concrete (TRC). Warp-knitting is a well-known system to incorporate high-performance rovings straightly as a grid fabric with specified mesh size. In these kinds of fabrics, geometry of the rovings and configuration of fabric play a vital role in TRC performance and eventually properties of TRC. The influence of knitting process parameters like knitting tension and stitch length on roving geometry and fabric configuration is systematically addressed in this study. To monitor and control knitting tension, a set of tension-meters is installed and calibrated on different positions on knitting yarns. Accordingly, three levels of tension with three different stitch lengths, namely 2.1, 4.2, and 6.3?mm (nine categories) are produced to investigate the influence of knitting parameters on roving geometry and NCFs properties. It is demonstrated that the stitch length is more effective than knitting tension to control both roving geometry and NCFs properties. Indeed, the packing density of fibers and profile shape of warp and rovings can be controlled via appropriate stitch length. Moreover, to fabricate a stiff NCF, the small stitch length with a high level of knitting tension must be applied simultaneously.