棉/单芯涤纶长丝包芯纱的性能研究

分别对棉/单芯涤纶长丝包芯纱与纯棉环锭纱的性能进行了测试分析。结果表明对于相同线密度的纱线,棉/单芯涤纶长丝包芯纱的拉伸性能、断裂强度和毛羽均高于纯棉环锭纱,耐磨性较纯棉环锭纱高。     

动态恒张力氨纶输送控制研究

针对针织生产过程中氨纶与导纱嘴摩擦力及编织成圈喂纱量变化导致氨纶输送张力不均匀的问题,深入分析摩擦机制及氨纶输送流程特性,提出了一种基于速度和张力双闭环方式的恒张力氨纶输送控制方案。分析了氨纶输送相关工艺,构建了氨纶张力模型和混合式步进电动机数学模型,提出了张力模糊PID控制策略,进行了Simulink仿真及Recurdyn/Colink机电联合仿真,阐述了恒张力氨纶输纱控制算法实现。仿真结果表明,采用该控制方案可提高氨纶纱线输送的抗扰动能力、抑制纱线的振动以及减小氨纶输送张力的波动,同时模糊PID进行氨纶张力控制拥有更好的性能,响应时间更快,抗干扰能力更强。实验验证了本控制策略的适应性和优越性,动态恒张力氨纶输送控制方案具有工程应用价值。     

Torque calculation between circular coils with inclined axes in air

In this paper we derive new semi‐analytical expressions for calculating the electromagnetic torque between inclined circular coils in air. The torque calculation has been obtained from the corresponding mutual inductance between inclined circular coils using the filament method. The coils of rectangular cross‐section whose centers are at the same and the different axes have been considered. From this general case it is possible to calculate the torque between all possible coil combinations either with rectangular or neglected cross‐section. Results obtained by the presented approach are in very good agreement with already published data. This method can be used for industrial electromagnetic devices such as torque sensors, transducers and torque‐measuring devices. Copyright © 2010 John Wiley & Sons, Ltd.     

涤纶长丝收缩率之比较研究

主要详细对比了不同处理条件下涤纶长丝的沸水收缩率和干热收缩率的差异。当热盘温度固定时,五叶形截面涤纶长丝和多异涤纶长丝的干热收缩率和沸水收缩率都随着热板温度的升高而下降。而对于不同的热处理条件,其干热收缩率和沸水收缩率的差异表现出较为复杂的关系,这种结果可通过玻璃化温度转变的不同来进行解释。     

精纺毛涤粘雨丝花呢的设计与生产

介绍了精纺毛涤粘雨丝花呢的风格特点、生产工艺及关键生产控制过程。该产品利用粘胶长丝、涤纶长丝与毛涤混纺纱在生产过程中存在的缩率差异,并借助不同纤维的反光程度不同,赋予了普通花型特殊的雨丝外观效果。考虑到雨丝外观的特点,设计中运用了特殊的纱线结构、合理的色彩配置和一定的色纱排列并对设计参数进行了选择,同时,生产中优化和改进了各工序的工艺参数,对关键工艺技术采取了有效的质量控制措施,提高了生产效率和成品制成率。     

IMS多功能测厚仪高压控制发生器故障分析及改进措施

针对宝钢湛江钢铁热轧厂IMS多功能测厚仪高压控制发生器灯丝电流多次异常持续升高的故障情况,检测灯丝电流控制板及灯丝高压变压器部分,对高压控制发生器内部工作情况进行解体检查。得知灯丝高压变压器部分磁芯松动是引起高压控制发生器灯丝电流故障的根本原因,提出防止磁芯发生松动等对策措施,取得了良好的效果,对于同类测厚仪的问题处理及高压控制发生器的控制机理分析具有参考意义。     

涤纶工业丝及帘子线油剂的研制

从考核涤纶工业及帘子线油剂的使用性能入手,较详细的介绍了ＴＣ－９７０２涤纶工业丝及帘子线油剂的配方设计。思想并与进口产品的物化性能,实际应用等方面进行了较详细的对比,结果表明,本研究产品在可纺性,耐热性及工业丝质量等方面均达到美国同类产品的水平。     

Mechanical characteristics of oil palm fiber reinforced thermoplastics as filament for fused deposition modeling (FDM)

Fibers are increasingly in demand for a wide range of polymer composite materials. This study's purpose was the development of oil palm fiber (OPF) mixed with the thermoplastic material acrylonitrile butadiene styrene (ABS) as a composite filament for fused deposition modeling (FDM). The mechanical properties of this composite filament were then analyzed. OPF is a fiber extracted from empty fruit bunches, which has proved to be an excellent raw material for biocomposites. The cellulose content of OPF is 43%-65%, and the lignin content is 13%-25%. The composite filament consists of OPF (5%, mass fraction) in the ABS matrix. The fabrication procedure included alkalinizing, drying, and crushing the OPF to develop the composite. The OPF/ABS materials were prepared and completely blended to acquire a mix of 250 g of the material for the composition. Next, the FLD25 filament extrusion machine was used to form the OPF/ABS composite into a wire. This composite filament then was used in an FDM-based 3D printer to print the specimens. Finally, the printed specimens were tested for mechanical properties such as tensile and flexural strength. The results show that the presence of OPF had increased the tensile strength and modulus elasticity by approximately 1.9% and 1.05%, respectively. However, the flexural strength of the OPF/ABS composite had decreased by 90.6% compared with the virgin ABS. Lastly, the most significant outcome of the OPF/ABS composite was its suitability for printing using the FDM method.The full text can be downloaded at https://link.springer.com/content/pdf/10.1007%2Fs40436-019-00287-w.pdf     

纳米TiO2/涤纶海岛丝针刺无纺布光催化复合材料的制备及性能

以德固赛P25纳米TiO₂为光催化材料、去离子水为介质,分别以十二烷基硫酸钠（SDS）、十二烷基苯磺酸钠（DBS）、聚乙烯毗咯烷酮（PVP）、十六烷基三甲基溴化铵（CTAB）、聚丙烯酸钠（PAAS）为分散助剂,制得系列纳米TiO₂光催化分散液。用纳米TiO₂光催化分散液对涤纶海岛丝针刺无纺布（PFN-NWF）进行二浸二轧后整理,得到TiO₂负载的PFN-NWF （TiO₂/PFN-NWF）光催化复合材料。采用激光粒度仪、TEM、SEM、拉伸、透气等表征测试,通过静置、光催化降解辣椒油和甲醛溶液等方法评价。结果表明：分散助剂自身的酸碱属性及分子结构对纳米TiO₂分散体系有重要影响,其中PAAS分散效果最佳;纳米TiO₂在PFN-NWF上包覆均匀,负载率为4.79%,负载牢度高;自然光照射60 min,试样上2 mL油污达到完全自清洁效果;300 W氙灯照射2 h,TiO₂/PFN-NWF光催化复合材料试样对甲醛的降解率达到95.98%,5次循环使用后,降解率为90.19%。