Numerical Simulation of the Air Jet Flow Field in the Melt Blowing Process

The theoretical model of the flow field of the dual slot die in melt blowing process is founded. The model is solved numerically with finite difference method. The distributions of the air velocity component in x direction along x-axis and y-axis and the air temperature distributions along x-axis and y-axis are obtained via numerical computation. The computation results coincide with the experimental data given by Harphain and Shambaugh. The distributions of the air velocity and air temperature are introduced into the air drag model of melt blowing. The model prediction of the fiber diameter agrees with the experimental data well.     

佛道文化与唐代武侠小说

唐代武侠是最早的具有现代意义的武侠，唐代武侠小说的模式预示了后代武侠小说的发展方向，标志着以写实为特点的侠客传记向以虚构幻想为特点的武侠小说的转变；唐代佛道文化的繁荣鼎盛，是这种转变的原因。     

用X-射线衍射法研究低熔点多元共聚酰胺的热稳定性

用低熔点多元共聚酰胺为原料生产网膜热溶胶,较液态胶粘剂和糊状胶粘剂性能优越.主要用X-射线衍射法研究低熔点多元共聚酰胺的热稳定性,为其熔喷非织造加工和使用提供指导.     

Packaging Bags with the Function of Micro-environment Modification

Three kinds of packaging bags composited with barrier film and moisture absorbents were designed in order to find out how to create an internal micro-environment with low 02 content and relative humidity （RH）. Peanuts with different moisture contents were filled into packaging bags and stored in an environmental chamber for a certain period of time. An RH recorder was sealed in each bag and the RH inside the bag was recorded. The moisture contents of peanuts before and after storage were measured as well. It is found that peanuts with moisture content of 13 % can reduce 02 content inside the bag by the aerobic respiration, achieving the self modified atmosphere packaging （ MAP ） effect. A micro- environment with lower RH can be created by using super-absorbent fiber （SAF） or mineral bag as the moisture absorbent. The moisture contents of peanuts stored in the bags with SAF and mineral bag as moisture absorbent decreased from 13% to 10.5% and 11.3%, respectively. SAF is a promising material of packaging bags composited with barrier film, in which a low RH and high CO2 content can be created.     

壳聚糖/黏胶水刺医用敷料的制备及其性能

在不同水刺压力下分别采用平行铺网和交叉铺网方式,制备了壳聚糖与黏胶混纺比为80/20和60/40的水刺医用敷料,并对试样的刚柔性、液体吸收性、透气性、水浸出液pH值和水中溶出物性能进行了对比和分析.结果表明:壳聚糖/黏胶水刺医用敷料的柔软性、液体吸收性、透气性、pH值和在水中溶出物的质量分数随着壳聚糖纤维含量的增加呈上升趋势;水刺压力增大时,水中溶出物减少,pH值未见显著变化,而柔软性、液体吸收性和透气性变差.     

不同黏度聚丙烯流动性能及其皮芯型纺黏纤维

研究了不同黏度聚丙烯熔体的表观黏度与切变速率、温度之间的关系,并比较了不同黏度聚丙烯熔体制得的皮芯型纺黏纤维的力学性能和结构。结果表明:随着温度的升高,黏度越大的聚丙烯熔体的表观黏度减小速率越快;随着切变速率的加快,熔体的表观黏度不断减小。在相同的纺黏工艺条件下,低黏度的聚丙烯熔体制得的皮芯型纤维更细,断裂强度更小;与机械牵伸工艺相比,聚丙烯复合纤维的解取向程度改变不明显,黏度越小的聚丙烯复合纤维取向度和结晶度越大。采用不同黏度聚丙烯熔体制备的皮芯型纺黏纤维,仅部分纤维截面会呈现皮芯型结构。     

转杯纺假捻盘作用现状研究

介绍了转杯纺假捻盘对纱线加捻过程影响作用的研究现状,分析和评价了几项比较具有代表性的研究,说明了假捻盘在转杯纺纱加捻过程中具有假捻、阻捻或捻陷作用的不同观点及其相应的分析方法,并对今后分析假捻盘在转杯纺加捻过程中作用的研究思路提出了建议。     

羽毛纤维对Cu2+的吸附机理探究

采用电子顺磁共振(EPR),对吸附CuSO4溶液中Cu2+后的羽毛纤维进行检测;同时,采用傅里叶变换红外光谱(FT-IR)和广角X衍射(XRD)对吸附Cu2+前后的羽毛纤维进行检测,以探讨羽毛纤维吸附Cu2+的机理,研究结果表明:β折叠结晶结构上的胱氨酸可能与Cu(Ⅱ)形成配位结构.吸附Cu2+后,羽毛蛋白中出现更多的α螺旋构型,而β折叠构型相应减少.     

非织造纤维膜的离子分离特性研究

通过对离子水pH值及膜的性能测试，分析各种不同工艺、原料的非织造纤维膜在水的电离过程中所表现出的各自特性，及其对水中酸、碱离子的分离效果的影响，实验证明，非织造复合纤维膜具有良好的酸、碱离子分离性能。     

熔喷非织造气流拉伸机理研究的新进展

简要叙述了熔喷法制备超细纤维的气流拉伸机理研究的进展情况,分析和评价了几种比较有代表性的数学模型,并对今后研究的方向提出了建议.