用于细旦长丝变形的MPS CoolFlex

由于能耗可降低30%,MPS变形机可很容易地将速度提高30%,从而使MPS的构想成为一种用于细旦长丝变形加工的十分经济的方案.     

现代长丝浆丝机

根据长丝浆丝机与普通浆丝机工艺路线的不同,以及上浆特点和主要机构,指出现代长丝浆丝机,是无捻合纤长丝上浆及喷水、喷气织机较理想的配套设备。     

世界拉伸变形机市场趋势

自1994年以来,国际纺织制造商联盟(ITMF,瑞士苏黎世)就已将假捻拉伸变形机(不包括聚酰胺、PET、聚丙烯及膨化变形长丝地毯纱和喷气变形机)纳入年度纺织机械(纺纱机、织机和针织机)调查中了.自1994年以来,变形纱生产商(纤维生产商和捻丝厂商)投资了134 000个聚酰胺变形丝锭和1 970 000个PET变形丝锭子.     

SSM参加中国(义乌)H&G展会

正2013年11月19—22日,第14届中国(义乌)国际袜子、针织及染整机械展览会在浙江义乌国际博览中心举行。这一区域以袜业和内衣的集散中心而闻名,在举办的展会上吸引了大量当地参观者。瑞士SSM公司携手其代理香港中大公司共同亮相展会。SSM展出了两台长丝应用的机器,TG.30 AEM假捻变形丝机和FM1手动落丝高速卷机,吸引了众多眼球。其中,SSM GIUDICI TG.30 AE/AEM是一台专门设计用于假捻变形细旦和中旦锦纶与丙纶长丝的机器,结合了     

巴马格公司研制的新型牵伸加捻机

此种新型牵伸加捻机具有高度可变特性。由于采用几排不同的导丝盘(加热的和不加热的)和插入式热导轨,因而可以生产锦纶、丙纶和涤纶等各种长丝。设备程序设计范围较大,有适合生产普通长丝的简易程序,也有适合生产高强度、低收缩涤纶长丝的程序。     

中国台湾聚酯变形丝市场走低

直到1998年为止,中国台湾是世界变形丝的最大产地,但从那年中国内地取而代之,成为世界最大产地.中国台湾拥有巨大的变形丝产能,例如,南亚具有年产15万t变形丝的能力.POY的产能约为32.5万t/a.除了1999年和2000年之外,所有年份的实际产量数据没有提供,比利时布鲁塞尔CIRFS对变形丝的产量进行了估算,其基础是假设聚酰胺长丝产量的20%为变形丝,聚酯长丝中多达75%为变形丝(表1).     

长丝测试装置的困境

介绍了目前长丝测试中存在的问题;介绍了HDK和TYT装置,分别用于拉伸或变形喂入丝和变形丝的测试.     

巴马格公司新一代变形机

MPS变形机是巴马格公司研发的用于丝束变形的新一代变形机。本文介绍了MPS新的设计思想及其应用的先进技术，设备的优点和适用性。     

空气变形纱及其产品应用的现状和前景

空气变形纱空气变形就是将扁平复合丝加工成变形结构纱,以此原料制造的织物或针织品可与短纤维的产品相媲美。空气变形纱同假捻丝一样是由长丝加工而成,但其结构却不同,它没有弹性。空气变形纱具有与短纤维相似的强度及伸长性     

纱线条干仪测试空气变形长丝的研究

用电容式和光电式纱线条干仪测试分析了涤纶空气变形长丝（不加及加入有机导电纤维）的结果；分析了加入有机导电纤维后电容式条干不匀数据变化的原因；提出了用光电式条干仪加测空气变形长丝不同大小丝圈丝弧数量和失圈丝数量等新指标的建议。     

Effect of nozzle size on texturing performance: comparison between air-jet and steam-jet texturing

The objectives of this research work were to investigate the use of steam in order to replace air in the production of spun-like textured yarn and to investigate the optimum nozzle size for steam-jet textured yarn for the application of sewing thread. An existing air-jet texturing machine was modified to supply either air or steam to the texturing nozzle. Using four texturing nozzles, both air-jet and steam-jet textured yarns were manufactured. The effect of nozzle size on process and yarn parameters has been studied and compared with air-jet textured yarns. The results show that spun-like textured yarn manufactured using steam has lower loop instability and higher tensile properties than air at comparable fluid pressures. SEM image analysis shows that the entangled structure of the steam-jet textured yarns is similar to air-jet textured yarns. Further, sewability results show that steam-jet textured yarns are suitable to manufacture sewing threads.     

Steam as an alternative fluid for air in spun-like texturing: effect of core-yarn draw and core-yarn heat setting on texturing performance

The objectives of this research work were to investigate the use of high-pressure steam in order to replace air in the production of spun-like textured yarns and to investigate the effect of core-yarn draw ratio and core-yarn heat setting on texturing performance. An existing air jet texturing machine was modified to supply either air or steam to the texturing nozzle. Using an identical nozzle, both air-jet and steam-jet textured yarns were manufactured. Results show that the core-yarn and textured yarn tension increase and the loop instability decreases when the core-yarn draw ratio is increased. Therefore, it can be predicted that the core-yarn draw ratio has influence on the performance of both air jet and steam jet texturing. Boiling water shrinkage of core-yarn as well as air-jet and steam-jet textured yarn increases when the core-yarn draw ratio was increased. However, steam-jet textured yarn has lower boiling water shrinkage than both core-yarn and air-jet textured yarn. Core-yarn heat setting does not have influence on core-yarn and textured yarn tension in the air jet texturing. In steam jet texturing, core-yarn heat setting reduces core-yarn and textured yarn tension. Therefore, it can be predicted that core-yarn heat setting is important for steam jet texturing.     

Investigating the effects of draw ratio,hot-pin temperature,and overfeeding on the color values of air-jet textured polyester yarns

In this study, influence of draw ratio, hot-pin temperature, and overfeeding on the color values of air-jet textured yarns, which were produced from polyester partially oriented yarn, was investigated. Two different air-jet textured yarns were produced by setting the value of only one variable to its minimum and maximum, while the reference values selected for the production of the reference yarn were used for the rest of the variables. Six different air-jet textured yarns, which were produced by varying draw ratio, hot-pin temperature, and overfeeding, and the reference air-jet textured yarn were dyed with the same dyeing procedure. Some physical properties such as linear density, tenacity, and breaking extension of the air-jet textured yarns were measured and images of the cross-section of the yarns were taken. The color coordinates of the dyed yarn samples were also measured. The color differences of six yarn samples compared to reference air-jet textured yarn were calculated. Changing draw ratio, hot-pin temperature, and overfeeding affected the color values of the air-jet textured yarns according to the results. It was found that, overfeeding is the parameter that affects the color values of the air-jet textured yarn most.     

Effects of core-yarn overfeed on texturing performance: comparison between air-jet and steam-jet texturing

The objectives of this research work were to investigate the use of high-pressure steam in order to replace air in the production of spun-like textured yarns and to investigate the optimum level of core-yarn overfeed ratio for steam-jet textured yarn for the application of sewing threads. An existing air-jet texturing machine was modified to supply either air or steam to the texturing nozzle. Using an identical nozzle, both air-jet and steam-jet textured yarns were manufactured. Loop instability and loop density increased and strength and tenacity decreased when the core-yarn overfeed was increased in both air-jet and steam-jet textured yarns. Steam-jet textured yarns have lower loop instability, lower loop density and higher tensile properties than that of the air-jet textured yarns. Sewability results show that for both air-jet and steam-jet textured sewing threads, core-yarn overfeed ratios of 5.5 and 8.3% give better sewability.     

Investigation of the effect of core-yarn wetting on air-jet and steam-jet spun-like texturing performance

The objective of the research work was to investigate the use of steam as an alternative fluid for air in spun-like textured yarn manufacturing and to investigate the effect of wetting on texturing performance. An existing air-jet texturing machine was modified to supply either air or steam to the texturing nozzle. Both air-jet and steam-jet textured yarns were made using the same process parameters with and without core-yarn wetting. The effect of core-yarn wetting on the texturing performance has been studied. Results show that core-yarn wetting is critical for air-jet texturing but do not have considerable impact on steam-jet texturing. Therefore, core-yarn wetting could be eliminated in steam-jet texturing. Further, steam-jet texturing shows its capability in manufacturing spun-like textured yarns with better performance than the air-jet. Therefore, it can be concluded that steam can be used as an alternative fluid for air in making spun-like textured yarns without core-yarn wetting.     

聚酯/粘胶混纺空气变形丝的性能

由聚酯和粘胶长丝生产混纺空气变形丝,以研究不同混纺比对物理性能的影响。研究揭示:这种混纺空气变形丝的外形膨松度随聚酯比例的减少而增大,并在聚酯/粘胶质量分数比为50:50的混纺纱中膨松度最大。在混纺空气变形丝中,随聚酯比例的减少,丝圈的不稳定性增大,而收缩率减小。在聚酯/粘胶混纺空气变形丝中,随聚酯比例的减少,强度和伸长下降。     

利用光衍射测量长丝纱的变形结构

无变形的长丝纱倾向于以一种平行且均匀的方式排列在一起。相比于表面不太均匀且包含毛羽的短纤维纱线,无变形的长丝纱表面很光滑。在很多应用中,人们期望可在保留长丝纱连续性的同时获得短纤纱的某些特性。通过变形丝工艺,可以使长丝纱获得特定的性能,如高膨松性、高弹性和孔隙度。在实验室中,可以离线测量变形纱的性能,但还没有实现对运行过程中的纱线进行性能的实时在线光学检测。离线测量方法成本高,且只能获得随机纱线样本质量的统计信息。除介绍了最先进的变形纱参数的测量外,还提出了一种直接光学测量变形纱的潜在方法。     

超高速纺丝吸丝枪吸丝效率影响因素的研究

为了阐明生产条件和纱线规格对吸丝枪吸丝效率的影响,测试了不同纱线种类、纱线喂入速度v和供气压力(表压)p下吸丝枪的吸丝张力F和压缩空气质量流率G,分析了这些因素对吸丝枪吸丝效率η(η=F/G)的影响机理,得到如下结果:p一定时,随着v的增加,F和η减小;v一定时,随着p的增大,F增大,但η下降;相同规格的全牵伸丝(FDY)比拉伸变形丝(DTY)的F和η大;同一种类纱线,线密度越大,F和η越大。研究表明:不同的产品品种和生产条件,应该合理选择吸丝枪并选用合适的供气压力,从而提高生产效率,降低能耗。     

Characterization of fabric properties knitted from multifilament polyester textured yarns with various number of filaments

The purpose of this study is to investigate the physical and mechanical properties of fabrics knitted from textured polyester multifilament yarns with various numbers of filaments in the yarn cross-section. In this regard, some of the characteristics of yarns and fabrics, knitted from the mentioned yarns, were measured and analysed. Analysis of results showed that increasing the number of filaments in the yarn cross-section leads to a decrease in yarn’s diameter and abrasion resistance. Moreover, examining the properties of the weft-knitted fabrics revealed that increasing the number of filaments causes a rising trend in the compressibility and bursting strength of fabric. On the contrary, the thickness, air permeability and abrasion resistance decreases due to a growth in the number of filaments. A decline in the strength and elongation of yarns and fabrics produced from them is also another result of increasing the number of filaments in the yarn cross section.     

长丝变形纱的皮芯结构及其参数

在变形纱中,空气变形类和异收缩变形类纱线具有皮芯结构,有必要对其成形原理和结构模型加以概括和总结。借助实验观察和理论分析的方法,认为虽然上述2种变形纱皮芯结构的成形原理不相同,但模型都可以描述为紧密网络扭结的芯层和松散圈弧形态的皮层结构。结合EIB实验验证,可以进一步确认变形纱的皮芯结构参数主要包括由纱线平均直径、纱芯平均直径和丝圈丝弧高度等项目,因而也可断定变形纱皮芯结构与变形纱膨松度、变形纱条干均匀度以及变形纱毛羽的各项特性指标有密切关系。