共查询到19条相似文献,搜索用时 109 毫秒
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根据纯涤纶短纤纱的性能制订了两组上浆配方,其中配方二使用新型变性淀粉T5完全取代聚乙烯醇(PVA)。对浆料及浆膜的各项性能进行了测试,并用两种配方的浆料分别对纱线进行上浆,测试上浆后纱线的各项性能。结果表明:采用高比例T5进行纯涤纶短纤纱复配上浆,其浆膜与浆纱后纱线的性能都能满足生产加工的要求,且成本低、易降解,适应绿色环保的加工趋势。 相似文献
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针对竹炭改性涤纶纱线毛羽较多、耐磨性较差的缺点,制备了3种浆料配方,对各配方浆液及浆膜性能进行了测试分析;分别采用3种浆料配方对竹炭改性涤纶纱线进行浆纱试验,并测试了不同配方下浆纱的各项性能;通过对比分析,得出了适合竹炭改性涤纶纱线的浆料配方及上浆工艺。 相似文献
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介绍了利用再生材料生产远红外三维卷曲中空涤纶短纤维的生产控制要点。通过原料的把关,前后纺工艺的调整,生产出了质优价廉的远红外再生三维卷曲中空涤纶短纤维。 相似文献
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对立体卷曲中空涤纶短纤维卷曲性能的测试方法进行了研究。通过试验,确定了测试三维卷曲中空涤纶短纤维卷曲性能的最佳试验根数。 相似文献
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通过测试,研究了抗菌中空涤纶的形态结构,摩擦性能、机械性能、卷曲性能、导电、导湿性能和透气性能。指出抗菌中空涤纶是一种新型环保抗菌纤维,其特有的物理化学性能及功能性,决定了产品服用性能良好,产品繁多,在开发非织造布产品上的前景将十分看好。 相似文献
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《高科技纤维与应用》2016,(2)
通过对14.6 tex天丝/竹纤维混纺纱线的物理性能进行研究分析,发现天丝/竹纤维混纺纱线具有毛羽多、弹性差、湿模量高、吸湿膨胀等性能缺陷。为改善其浆纱性能,针对天丝/竹纤维纱线的缺点,配置了两种适合于其上浆的浆料配方,并测试分析了其浆液、浆膜和浆纱性能。结果表明,加入适量的聚丙烯酸和变性淀粉等浆料对天丝/竹纤维混纺纱线的上浆效果好,上浆后,浆纱性能得到明显改善。 相似文献
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The effects of air gap length on the internal and external morphology of hollow fiber membranes 总被引:1,自引:0,他引:1
M Khayet 《Chemical engineering science》2003,58(14):3091-3104
A systematic study of the air gap effects on both the internal and the external morphology, permeability and separation performance of polyvinylidene fluoride (PVDF) hollow fiber membranes has been carried out. The hollow fibers were prepared using the dry-jet wet spinning process using a dope solution containing PVDF/ethylene glycol/N, N-dimethylacetamide with a weight ratio of 23/4/73. Ethanol aqueous solution, 50% by volume, was used as internal and external coagulants. The inner and the outer surfaces of the prepared hollow fibers were analyzed by atomic force microscopy (AFM), while their cross-sectional structure was studied by scanning electron microscopy (SEM). Ultrafiltration experiments were conducted using non-ionic solutes of different molecular weights. The results show that both the pore sizes and nodule sizes have a log-normal distribution. The pore size, nodule size and roughness parameters of the inner and outer surfaces of the hollow fibers were affected by the air gap distance. Alignment of nodules to the spinning direction was observed. Experimental results indicate that an increase in air gap distance, from 1 to , results in a hollow fiber with a lower permeation flux and a higher solute separation performance due to the decrease of the pore size. AFM analysis reveals that the air gap introduces an elongational stress because of gravity on the internal or external surfaces of the PVDF hollow fibers. At low air gap distance, the inner surface controls the ultrafiltration performance of the PVDF hollow fiber membranes because of its lower pore size, while at high air gap lengths the inner pore size becomes larger than the outer pore size. The turning point was observed at an air gap distance of . 相似文献
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《分离科学与技术》2012,47(14):2199-2210
Hollow fiber poly(vinyl chloride) membranes were prepared by using the dry/wet spinning method. Cross-section, internal, and external surfaces of the hollow fibers structure were studied by SEM. The pore size and pore size distribution of the hollow fibers were measured by a PMI capillary flow porometer. UF experiments of pure water and aqueous solution of PVP K-90 were carried out. The effect of the PVC concentration on the hollow fibers mechanical properties was also investigated. It was found that the PVC fibers cross-sectional structure was affected by the polymer concentration in the dope solution. In particular, reduction of macrovoids size was observed when increasing PVC concentration from 15 to 19 wt%. The pore size distribution of the PVC hollow fibers was controlled by adjusting the PVC concentration. Indeed, an increase of PVC concentration up to 19 wt% leads to fibers with sharp pore size distribution (the 99% of pores is about 0.15 µm).The pure water permeation flux decreased from 162 to 128 (l/m2 · h · bar), while the solute separation performance increased from 82 to 97.5%, when increasing the PVC concentration. The elongation at break, the tensile strength, and the Young's modulus of the PVC hollow fibers were improved with PVC concentration in dope solution. 相似文献
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纳米远红外陶瓷粉体的制备工艺与性能研究 总被引:6,自引:0,他引:6
本研究分别采用固相合成法和液相共沉淀法制备远红外陶瓷粉体,采用X光小角散射法测试其颗粒分布和平均粒度,采用XRD分析其物相和SEM观察其显微结构形貌,结果表明,液相共沉淀法制备的远红外陶瓷粉体的平均粒度达到95纳米,且颗粒大小分布窄,而固相合成法制备的远红外陶瓷粉体颗粒粗大且不均匀,经中国计量科学研究院测试,液相共沉淀法制备的远红外陶瓷粉体的法向全辐射发射率为93%,固相合成法制备的远红外陶瓷粉体的法向全辐射发射率仅为82%。 相似文献
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本文主要介绍了一种高性能包芯纱。它是以高性能纤维为芯纱、热融纤维为包缠纱,通过二维编织工艺加工而成。外层编织纱对高性能芯纱的保护使复合后的纱线的织造性能得到很大改善,可直接在二维或三维织机上进行织造。织物下机后经过热压成为热塑性复合材料。本文对丙纶/玻璃纤维包芯纱的纱线设计、纱线的几何模型进行了理论研究,确立了纱线结构参数的计算方法。 相似文献
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介绍我国商业化复合短纤维工业现状 ,皮芯型、并列中空型双组分复合短纤维生产工艺技术和产品应用情况。建议国内生产复合短纤维选择长程纺 ,并加强对复合短纤维下游产品的研究开发。 相似文献