假编丝生产新工艺探讨

通过对原有设备、加工流程的改造与创新,探索研究了一种新型的复丝假编变形新技术,并从给纱方式、加工速度、定型温度、定型时间、卷绕张力等方面对假编丝生产新工艺进行了探讨。     

假编丝针织物的美学效应

本文研究应用假编丝编织织物时确定最适宜的KDt(Knit-de-Knit假编的缩写,下同)比率,以便获得最理想的美学效应。采用主观评价的方法,对于可能影响美学效应的不同的织物参数进行了客观的测量。试验使用的材料: 假编丝织物试样采用下例几种纱线: 167分特聚脂长丝;167分特聚脂变形丝;167分特聚酰胺变形丝;78分特×2聚酰胺变形丝;25特本色HB聚丙烯腈纱线。编织过程:     

纬编间隔织物的编织工艺与压缩性能探讨

采用涤纶单丝作为间隔纱和低弹涤纶长丝作为表层纱,在双面圆纬机上编织了几种不同规格的纬编间隔织物,并探索了编织工艺.对这些织物的压缩性能进行了测试,分析了压力-变形曲线和影响压缩变形和回复性能的因素.实验结果表明,在其它条件都相同时,间隔纱细度、织物密度、筒口距离的增加,有利于减小织物的压缩变形和提高回复性能.     

解编纱研制及其机织产品开发

随着纺织技术的不断发展,人们研制了种类繁多的花式纱、变形纱,并将其广泛应用于各类纺织新产品。它们不仅点缀了纺织品的外观,也改善了纺织品的服用性能,满足了消费者对纺织产品日益增长的需求。 解编纱(丝)属于一种压缩应力的变形纱(丝),它具有较稳定的屈曲形态、较好     

INA/FAG特殊滚动轴承单元——实现加弹变形机械卓越性能的强力保证

弹力丝因其特性的多样性满足了面料方面丰富多彩的需求,可用于服装、床上用品、装饰、工业用丝等领域.这种多性能的弹力丝是通过拉伸变形加工工艺而来,其中假捻变形是应用较为广泛的变形工艺.     

世界拉伸变形机市场趋势

自1994年以来,位于瑞士苏黎世的国际纺织品制造商协会(ITMF),在其每年一次的纺织机械(纺丝、机织和针织机械)综述中,亦已包括了世界假捻拉伸变形机(不含PA、PET和PP BCF地毯纱线和空气喷射变形机)的销售状况.1994年以来变形丝生产厂(纤维生产厂和假捻丝生产厂)投入了PA变形丝127000锭,聚酯变形丝166万锭.……     

编结丝与真丝编丝机

介绍了新型质编结丝及ＳＫ—６０型编丝机的技术参数、工艺性能，并进行了技术经济分析。通过编丝途径加工的真丝服装，可提高产品的档次和价值，为丝绸新产品的开发提供了新途径     

羊毛畦编针织物尺寸特性分析

通过实验的方法,研究了横机编织的罗纹、半畦编和畦编羊毛针织物的尺寸特性,对3种织物的线圈长度、纵横向水洗收缩率、纵密及横密等各尺寸特性进行了分析与比较,实验得出,由于集圈线圈的存在,半畦编和畦编针织物的尺寸特性显著不同于罗纹针织物.通过建立尺寸变化率公式,计算出畦编织物与罗纹织物尺寸参数间的关系,可用于工厂实际生产设计时参考.     

锦纶6预取向丝拉伸假捻变形成型工艺研究

研究了锦纶6预取向丝拉伸假捻变形生产锦纶6变形丝(DTY)的成型工艺,探讨了不同线密度规格锦纶6预取向丝拉伸假捻变形加工速度、拉伸倍数、D/Y比和拉伸假捻变形温度的主要工艺参数。实验表明:当锦纶6预取向丝线密度规格为1.53~2.00之间,加工速度700~800m/min,拉伸假捻变形温度为167~179℃,拉伸倍数为1.25~1.30,拉伸假捻D/Y比选择在1.75~1.80较为合理,其拉伸假捻变形生产锦纶6拉伸假捻变形丝质量较好,具有取向结晶化结构和均匀形态的变形效果,符合后续用于生产拉伸变形包覆工艺及性能的要求。     

交叉风格真丝纬编面料的研究与设计

选用粗线密度的茧丝,采用多根茧丝合并,提高生丝的线密度.缫丝时在热水中添加泡丝剂增加真丝的柔软性,同时在缫丝时添加涤纶POY丝与蚕丝合并.然后对蚕丝和涤纶POY丝的复合丝进行机械和热的作用使复合丝变形,得到具有物理几何变形的真丝复合丝.采用多股真丝复合丝同时喂入低机号的针织横机中进行编织,通过精练处理、烘干,得到了具有粗犷风格的针织物.其蓬松性、弹性、悬垂性较好,适合生产各类针织外衣产品.     

Towards the Better Understanding of Self-twist Structures

An investigation is described in which several wrapped yarns were spun from 100% polyester staple fibre with different continuous-filament yarns in a wide range of wrapping densities. The tensile properties of the wrapped yarns were studied, and the effects of the linear density of the continuous filament yarn and the wrapping density on the yarn structure and tensile properties were investigated. The morphology of the yarn failure during tensile testing was studied by photographing the yarn during extension.

The yarn structure for the different continuous-filament-yarn wraps was examined by scanning electron microscopy. The study illustrates the effect of the wrapping filaments on yarn structure, yarn tensile properties, and the mechanism of failure during extension. The effect of the wrapping continuous-filament, yarn on yarn characteristics was found to be the predominant factor'.     

Weft Insertion on Air-jet Looms: Velocity Measurement and Influence of Yarn Structure Part II: Effects of System Parameters and Yarn Structure

An investigation of the effects of different weft–insertion–system parameters on yarn velocity is reported. Increasing the air–supply pressure, initial loop length, and running speed decreases the total insertion time and hence increases the average yarn velocity.

To examine the effects of yarn characteristics on yarn velocity, several yarns were tested under the same laboratory conditions. For every yarn, relations between total insertion time, yarn velocity, and air velocity and distance were obtained. It was found that open–end–spun (OE) yarns had a higher yarn velocity than ring–spun (R) yarns owing to the bulkier structure. However, R yarns had a higher initial acceleration than OE yarns. Murata air–jet–spun yarns had a higher velocity than R yarns.

Increasing the yarn linear density and twist increased the insertion time. Texturing of continuous–filament yarns increased the yarn velocity by comparison with straight continuous–filament yarns.     

The Air-permeability Measurement of Open Fabrics by Using Superimposed Fabric Layers

An account is given of an investigation of the dimensional properties of a series of plain weft-knitted fabrics produced from open-end-spun yarns. The results are compared with those for similar fabrics knitted from ring-spun yarns.

It is shown that fabrics knitted from the two types of yarn possess different properties and particularly that the amount of relaxation shrinkage observed in fabrics knitted from open-end-spun yarns is greater than that which occurs in fabrics knitted from ring-spun yarns. The aesthetic properties of fabrics made from open-end-spun yarns are inferior to those of fabrics made from ring-spun yarns, particularly with regard to a lack of stitch clarity and a somewhat harsher handle, although the latter effect is shown to be apparently unrelated to differences in the frictional properties of the two types of yarn.     

30—RATES OF SETTING IN FALSE-TWIST DRAW-TEXTURING PART III: THE EFFECT OF COOLING TIME AND LENGTH IN THE PROCESSING OF NYLON AND POLYESTER-FIBRE YARNS

An investigation of the effect of changing the cooling distance during the draw-texturing of nylon and polyester-fibre yarns is reported; it is shown that, as the cooling distance is increased, the crimp rigidity of nylon yarns first increases to a maximum value and then decreases, whereas for polyester-fibre yarns the crimp contraction continues to increase as the cooling distance increases. An investigation of the effects of the cooling distance on other properties such as crimp stability and dye shade, is also reported.     

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.     

Studies on the static and dynamic properties of different types of polyester industrial yarns

Four major types of polyester industrial yarns, viz. high tenacity (HT), high modulus low shrinkage (HMLS), low shrinkage (LS) and super low shrinkage (SLS) polyester yarns, were studied for their static and dynamic properties. An attempt has been made to establish a linkage between static and dynamic properties of these yarns with its structure and with its end applications. HMLS and HT polyester yarns have lower tan δ and work loss, which are the desired characteristics required for its end applications which include tire and conveyer belt. Higher overall orientation and higher fraction of tie molecules helped to achieve these properties in HT and HMLS polyester yarns. LS and SLS polyester yarns are mostly used for static applications. Low thermal shrinkage is the key requirement for the downstream processes of these yarns. Lower amorphous orientation in these two yarns is primarily responsible for achieving very low thermal shrinkage. A good co-relation has been established between the peak temperature of work loss (in slow speed hysteresis test) and the peak temperature of tan δ (in high-speed dynamic test).     

Influence of cyclic tensile straining parameters on the tensile characteristics of compact yarn

It would seem that previous tensile fatigue studies in yarns using the cyclic loading and extension principles were carried out with limited sets of variables and levels. To get a clear understanding of the tensile fatigue behaviour of yarns and in order to study the yarn damage under the influence of cyclic tensile straining, an investigation on the influence of various cyclic tensile straining parameters, extension level, extension rate and straining cycles at five different levels, on the tensile breaking load and breaking extension characteristics of compact yarn of count 14.75 Tex has been carried out. The extension level of 8 mm, the extension rate of 400 mm/min and the number of straining cycles of 2500 have resulted in the maximum drop in the breaking load and extension values of the yarn which are 30.4 and 40.25% lower than the average breaking load and extension values of the unstrained yarn.     

玻璃纤维喷气变形纱表面结构研究

由于纤维材料的特殊性,玻璃纤维喷气变形纱的纱线结构不同于一般合成纤维喷气变形纱。对玻璃纤维变形纱进行了大量的观察实验,对其表面形态进行了详尽的分析,并在此基础上提出了一个玻璃纤维变形纱表面结构的简化模型以及反映其表面形态的度量指标。     

A study on the quality of kapok blended yarns through different processing methods

In this paper, 14 types of kapok blended yarns and four types of cotton yarns manufactured through different spinning technologies and processing methods were selected in order to explore the most efficient spinning technology for kapok fiber. Four yarn characteristics were measured: yarn fineness/unevenness, yarn defects, yarn hairiness, and breaking tenacity. According to Uster Statistics 2007, GB-T/398-2008, and FZ12001-1992 standards, the analytical results of the four characteristics showed that the quality of kapok blended yarns achieved a higher level with the improvement of spinning technology. The compact spinning and processing technology IV was a preferred way to spin high-quality kapok blended yarn, which lent support to widening the application of kapok fibers in various end-use products.     

室内装饰织物用新型"atmofil"DSE纱线

介绍了用涡流包覆变形工艺和喷气变形工艺生产差异收缩自伸长纱线(DSE).分析了DSE纱线的结构和加工性能.