Fiber Migration and Distribution of Twist at Different Radial Positions of Rotor Yarn-by Hi-Scope Video Microscope System

BａｃｋｇｒｏｕｎｄＩｎｔｈｅｅａｒｌｙ 195 0ｓ,ＭｏｒｔｏｎａｎｄＹｅｎ[1] ｄｅｖｅｌｏｐｅｄｔｈｅｆｉｂｅｒｔｒａｃｉｎｇｍｅｔｈｏｄｉｎｔｈｅｙａｒｎ .Ｔｈｅｙｍｉｘｅｄｓｏｍｅｄｙｅｄｆｉｂｅｒｓｉｎｔｏｙａｒｎｂｅｆｏｒｅｃａｒｄｉｎｇ ,ａｎｄｄｉｐｐｅｄｔｈｅｙａｒｎｉｎａｃｈｅｍｉｃａｌｒｅａｇｅｎｔｗｉｔｈｓｉｍｉｌａｒｒｅｆｒａｃｔｉｖｅｉｎｄｅｘｔｏｏｂｓｅｒｖｅｔｈｅｄｙｅｄｆｉｂｅｒｓｉｎｔｈｅｙａｒｎｕｎｄｅｒｔｈｅｍｉｃｒｏｓｃｏｐｅ .Ｔｈｅｃｏｎｃｅｐｔｏｆｆｉｂｅ…     

Study on Electrospinning Silk Fibroin Solution

A new method of preparing silk fibroin （SF） solution used in the decterospinning was introduced in this paper. According to the method, SF was dissolved in the LiBr/CH2O2 solution directly at room temperature. The method was compared with the traditional method--SF was dissolved in CaCl2 ternary solution. The structure of SF films and the morphology of SF nanofibers were examined by attenuated total reflectance fourier transform intrared （ATR- FTIR） spectroscopy, Scanning electron microscope （SEM） and optical polarizing microscope. The result of this study shows that the new method is a faster, more convenient and high cfficieat way to get the SF solution and the characteristics of SF fiber made by the new metbod is much better.     

玻璃纤维长丝纱机械性能的研究

本文对玻璃纤维长丝纱的机械性能做了较全面的讨论。文中着重探讨了玻璃纤维长丝纱在静负荷作用下的松驰性能以及反复循环负荷作用下的疲劳性能,同时设计了测定玻璃纤维长丝纱弯曲性能的试验方法——套环法,并提出了相应的指标——抗弯系数W。试验结果表明,玻璃纤维长丝纱有较明显的应力松驰现象,反复循环负荷作用对玻璃纤维长丝纱的强伸性能有较大的影响。     

空气变形纱毛羽的测试方法

突出于纱体表面的零散的弧圈结构形成了空气变形纱的毛羽，其与纱线主体之间的界限模糊，且其毛羽结构和状态在外力作用下极易改变，对检测条件要求较高．通过4种仪器和方法对空气变形纱的毛羽进行了测量，认为EIB（Electronic Inspection Board）和Uster tester 4两种仪器的检测结果与静态投影目测计数法检测结果较为相近：空气变形纱毛羽数量高于同线密度的普通精纺毛纱和精梳棉纱的毛羽数量；空气变形纱的毛羽数量多集中于短毛羽（毛羽长度在1mm以下）区，并且随着毛羽长度增加而急剧减少，呈指数关系，在长毛羽（毛羽长度在2mm以上）区，空气变形纱毛羽数量显著少于短纤维纱．     

Study on PTFE/Kevlar49/PA6 Composites

The mechanical properties and material volume fractions of PTFE/Kevlar49/PA6 composite are studied. The focus of this paper is to get the relationship between the volume fraction of three constituents and the mechanical properties of the composite by doing tensile, hardness and wear test. The effect of the constituent volume fractions was evaluated. Short Kevlar49 fibers reinforced PA6 （Polyamide 6） with PTFE filler were studied in five different combinations. The results of the experiments show that the mechanical properties increase with Keviar fibers increase, then they decrease after the Kevlar fiber volume reaches one number.     

玻璃纤维/聚丙烯长丝喷气混纤纱力学性能研究

利用电镜观察玻璃纤维／聚丙烯长丝喷气混纤纱的结构，并通过对单纱热压，分析纱结中玻璃纤维的状态；在DCS500岛津试验机上测试了喷气混纤纱的性能。通过研究得到：喷气混纤纱的拉什强度和模量、纱线断裂伸长率受玻璃纤维／聚丙烯丝的混合程度、玻璃纤维在纱线中的状态、纱干表面聚丙烯纤维丝圈状态影响。     

Simulation of Melt Blown Web and the Effect of Its Pore Size Distribution on Filtration Performance

In this paper melt blown webs with different fiber dis-tributing density were simulated by the computer,and then their pore size distribution was calculated with the image analysis.Based on simulated fiber webs,the effect of 10% big pores on the filtration properties was ana-lyzed theoretically.It is found that the pore radius be-comes smaller and its distribution becomes more uniformwith increasing line density,i.e.,the fiber distributing density.The flow proportion in these 10% big pores is linearly increased with increasing the standard deviation     

耐久压烫整理纯棉织物的撕破性能

纯棉织物免烫整理后,拉伸、撕破强力下降,严重影响了织物的耐用性.通过研究免烫整理前后织物的拉伸和撕破强力、纱线的强力和伸长率、交织阻力、形态结构,分析影响撕破强力的因素.研究表明,纱线结构、强力以及伸长率对撕破强力有显著影响.强力和伸长率高的纱线织成的织物被撕破时受力三角区大,共同受力的纱线根数多,撕破强力高;组织结构、经纬纱密度影响纱线间的交织点及滑移情况.交织点少,纱线间滑移容易的织物的撕破强力高.     

一步法涤纶弹力型绉丝织物性能研究

涤纶仿真丝绉类织物的绉丝通常是对长丝加强捻经热定型获得。目前国外已采用加强捻、热定型、假捻三合一新工艺。本文通过选用两种加工工艺获得绉丝,然后进行织造、后整理,并对三种双绉织物(包括02真丝双绉)的起绉效果、光感、形感、透气性及力学性能等进行测试对比,结果表明,一步法涤纶弹力型绉丝织物起绉效果好,光泽柔和,手感膨松丰满、柔软,有关力学性能与02真丝双绉比较接近。     

氯化聚乙烯和双[（2—经基—3—环己基5—甲基）—苯基]甲烷混杂材料的粘弹性能分析

主要研究了极性高聚物氯化聚乙烯和有机小分子双[(2—羟基—3—环己基-5—甲基)—苯基]甲坑(ZKF)混杂体系的粘弹性能。通过DMA分析，发现ZKF的加入使CPE／ZKF混杂材料的玻璃化转变漫度升高，产生明显的抗增塑效果，同时阻尼因子tanδ值也随之增大。通过FTIR分析，发现CPE/ZKF混杂材料中ZKF和CPE之间存在氢键作用，并且随身ZKF加入比例的提高，CPE和ZKF之间的氢键作用量呈加强趋势。CPE和ZKF之间的氢键作用增强了ZKF大分子之间的作用力，一方面使CPE／ZKF混杂材料的玻璃化转变温度提高，另一方面,CPE／ZKF混杂材料在玻璃化转变时所耗散的能量增加，提高了阻尼因子tanδ。通过DSC测试，发现CPE／ZKF混杂材料中CPE和ZKF具有良好的相客性，另外，通过DSC测定的Tg与DMA结果有相似的趋势，也验征了抗增塑作用的存在。通过合理控制CPE和ZKF之间的氢键作用来调整CPE／ZKF混杂材料的tanδ和Tg，为进一步开发此类高性能减根材料提供了新的思路。