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本文介绍了锦纶弹力丝绞纱染色的工艺与方法,与传统的锦纶弹力丝筒子纱染色方法相比,此法能较好地保护锦纶的弹性,而且不增加工艺难度,不需新增染色设备,是锦纶弹力丝染色的较好的方法。 相似文献
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选用酸性蓝NHFS研究了3种锦纶纤维(生物基PA56、PA6和PA66)的染色动力学数据并进行了对比。通过测定上染速率曲线,计算出了扩散系数、染色速率常数及半染时间,探讨了锦纶56结构与染色性能的关系。结果表明:生物基锦纶56的扩散系数明显高于锦纶6和锦纶66,染色速率常数也明显高于锦纶6和锦纶66,半染时间最短;3种锦纶纤维在相同的染色温度下各自的半染时间染色后,锦纶56染色后的K/S值明显高于锦纶6、锦纶66。因此采用酸性蓝NHFS对锦纶56进行染色时,需要较短时间就可得到较深的颜色。 相似文献
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介绍了锦纶织物的染色性能和染浴的pH值对锦纶织物染色的影响,以采用释酸剂HTA为例,探讨了释酸剂的用量、加入方式及起始pH值对锦纶织物上染速率和上染率的影响。 相似文献
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为了使锦纶纤维与纤维素纤维的混纺或交织品染色后呈现麻花风格,文中采用锦纶织物和纯棉织物来模拟锦纶和纤维素纤维的交织织物,并分别用9种活性染料及锦纶污染防止剂进行锦纶的留白染色,测试并分析了锦纶污染防止剂对锦纶织物染色深度和纯棉织物色光的影响。结果表明,锦纶污染防止剂能够在一定程度上防止活性染料对锦纶纤维的上染,并且对部分染料染色后织物的色光影响不大;但对某些染料作用不大,在织物的留白染色中,需做好染料的筛选。 相似文献
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介绍了压缩制冷系统的原理和发展现状.汇总了系统常见的各类故障,分析了故障原因并介绍了解决方法.总结了实际运转中故障应对的经验,并提出了压缩制冷系统运行优化控制的建议. 相似文献
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Susmit A. Ilame 《Critical reviews in food science and nutrition》2015,55(7):964-987
Fruit and vegetable juices are used due to convenience. The juices are rich in various minerals, vitamins, and other nutrients. To process the juices and their clarification and/or concentration is required. The membranes are being used for these purposes. These processes are preferred over others because of high efficiency and low temperature. Membranes and their characteristics have been discussed in brief for knowing suitability of membranes for fruit and vegetable juices. Membrane separation is low temperature process in which the organoleptic quality of the juice is almost retained. In this review, different membrane separation methods including Microfiltration, Ultrafiltration, and Reverse osmosis for fruit juices reported in the literature are discussed. The major fruit and vegetable juices using membrane processes are including the Reverse osmosis studies for concentration of Orange juice, Carrot juice, and Grape juice are discusses. The Microfiltration and Ultrafiltration are used for clarification of juices of mosambi juice, apple juice, pineapple juice, and kiwifruit juice. The various optimized parameters in membranes studies are pH, TAA, TSS, and AIS. In this review, in addition to above the OD is also discussed, where the membranes are used. 相似文献
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Methods are described for the extraction and quantitation of endogenous barley thiols and disulphides. Thiols and disulphides, together with added internal standards, are extracted from ground barley tissues (embryos or degermed grains) and the thiols in the extract are trapped on columns of beaded p-hydroxymercuribenzoyl-agarose (p-HMB-agarose). After elution they are derivatised with 5,5′-dithiobis (2-nitrobenzoic acid) and the derivatives are separated and quantified by hplc. The disulphides in the effluent from the p-HMB-agarose column are collected on a silica-based ion exchange material. After elution they are reduced to thiols and, after derivatisation, they are assayed by hplc. Dry barley embryos contain substantial quantities of glutathione, progressively lesser quantities of oxidised glutathione, cystine and cysteine and traces of γ-glutamyl cysteine and cysteinyl glycine. 相似文献
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本文简要介绍了聚乳酸的研究进展及其结构和性能特点,论述了熔喷聚乳酸非织造材料的生产工艺及要求,提出了目前聚乳酸熔喷非织造材料生产中面临的一些问题,并列举了该类产品主要的应用领域,最后提出了几点建议。 相似文献
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文章介绍了精纺双弹织物的设计思想,对纤维原料、纱线的线密度和捻系数确定、氨纶丝含量和预牵伸倍数的确定、织造、后整理等加工工艺进行了阐述,重点探讨了产品关键工序的工艺技术参数及操作要求,围绕影响产品质量的因素提出了具体的措施。 相似文献
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Three main types of rodent filth (rodent excreta pellets, gnawing, and nesting material) are described and identification procedures are listed. Suspect excreta pellets that may be encountered in foods from various animals are described in detail and presented in a dichotomous key for comparison and identification. The physical features associated with the excreta pellets (color, shape, size, weight, surface, and matrix composition) are listed for the insects and animals found in the key. Rodent gnawing and rodent nesting materials are defined and the importance of the paired incisor marks, scalloping along edges and the appearance of the building materials are described. The importance of urine, rodent excreta, hairs and/or parasites when defining nesting material, are discussed, along with the key elements used to recognize the gnawing direction by the rodents. Historical data on rodents and health/safety concerns when handling rodent filth exhibits are addressed. 相似文献
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关于发展我国生态纺织品的建议 总被引:13,自引:7,他引:6
介绍了国际生态纺织品的标准动态,OKo-Tex Stiandard100标准的主要特点以及规定的主要检测项目与有害物质,并按照国际标准,分析了我国纺织工业存在的主要差距,并就此提高出发展我国生态纺织品的措施。 相似文献