拉伸工艺对渔用聚乙烯纤维结构与性能的影响.doc

拉伸工艺对渔用聚乙烯纤维结构与性能的影响闵明华, 黄洪亮, 刘永利,张勋,石建高, 王鲁民* (农业部东海与远洋渔业资源开发利用重点实验室,中国水产科学研究院东海水产研究所上海 200090) 作者单位摘要: 为纺制高性能渔用聚乙烯纤维, 实验作者以齐鲁石化生产的高密度聚乙烯为原料,进行螺杆挤出机熔融纺丝- 多级热拉伸纺丝实验。研究表明, 二级拉伸工艺可以使得聚乙烯大分子链在纤维中的排列更加规整;, 提高大分子链的取向度, 制备的渔用聚乙烯纤维的综合渔用性能更好。此外, 随着总拉伸倍数的提高,聚乙烯纤维的断裂强度、声速取向和热性能均都显著提高;。但是随拉伸倍数提高,渔用聚乙烯纤维的结节强度却呈现先升高后降低的趋势。结果显示, 一级拉伸倍数为 倍时, 聚乙烯纤维的断裂强度和结节强度分别为 5./dte x 和 4./dtex ; 当采用二级拉伸工艺, 一级拉伸倍数 倍, 总拉伸倍数为 倍时, 所制备的渔用聚乙烯纤维的断裂强度和结节强度分别为 7./dtex 和 5./dte x, 比现行国家标准中规定的聚乙烯单丝优等品指标高出 % 和 % 。关键词: 渔用纤维;聚乙烯;熔融纺丝;拉伸;力学性能 E ffect of draw process on the structure and properties of fishery polyethylene fibers MIN Minghua, HUANG Hongliang, LIU Yongli, ZHANG Xun, SHI Jiangao, WANG Lumin * Key Laboratory of East China Sea & Oceanic Fishery Resources Exploitation and Utilization, Ministry of Agriculture, East China Sea fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092 作者单位 Abstract : High density polyethylene pro duced by Qilu Petrochemical Engineering Co. Ltd was melt-spun by screw extruder and then multi-step drawn at high temperature to fabricate high performance fishery PE fibers. It was found that the PE fiber fabricated by two-step process showed more regular m acromolecular chains , higher orientation and better fishery properties than which fabricated by one-step process. In additional, with the total draw ratio increased, the breaking strength, sound orientation and thermal properties were improved, but the knot strength increased first and subsequently decreased .It was showed that when the draw ratio was in the one-step process, the breaking strength and knot strength of the PE fiber were 5./dtex and 4./dtex, respectively; but when the first and total draw ratio were and in the two-step process, the breaking strength and knot strength were 7./dtex and 5./dte x, which were % and % higher than the high-class products specified in the national standard , respectively. Key words : Fishery fiber; p olyethylene ;