| 摘要: |
| 为给深水网箱设计与渔用材料的合理选配提供依据,应用 ISO1806等对渔用高强度聚乙烯绞捻网片(以下简称HSPE绞捻网片)和普通聚乙烯绞捻网片(以下简称PE绞捻网片)的拉伸力学性能进行了比较研究。 结果表明,(1)在同等条件下,36股HSPE绞捻网片的网目连接点断裂强力和网片单线断裂强力分别比52股PE绞捻网片增加了3.1%,3.7%;而前 者的目脚直径和网片阻力可较后者减少19.6%。(2)对网片强力进行了再现性研究,36股HSPE和52股PE绞捻网片网目连接点断裂强力的标准偏差分 别为35.93N,25.61N,再现性标准偏差分别为31.07N,36.93N;网片单线断裂强力的标准偏差分别为19.91N,13.49N,再现 性标准偏差分别为20.48N,15.49N;网片强力测试数据的变异系数均小于4%;表示测试结果的分散性较小。(3)36股HSPE绞捻网片成本可较 52股PE绞捻网片减少38.9%,其在渔业生产中进行推广应用具有可行性。(4)GB/T4925作为一个标准,对绞捻网片来说,存在不足,建议对GB /T4925进行修订。 |
| 关键词: 绞捻网片 高强度聚乙烯(HSPE) 普通聚乙烯 深水网箱材料 ISO1806 |
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| 基金项目:国家高技术研究发展(863计划)专项经费资助项目(2006AA100301);国家标准化经费资助项目(20032255-T-326) |
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| Comparative study of tensile mechanic properties of high-strength and common polyethylene twisted netting for fishing |
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| Abstract: |
| To furnish reference to deep water sea cage designing and fishing materials selecting, this experiment investigated the differences in tensile properties obtained applying the ISO1806-2002 standard, GB/T4925-1985 national standard, to the high-strength polyethylene twisted netting (HSPE twisted netting) and common polyethylene twisted netting (PE twisted netting) for fishing. The results are as follows: (1) Under the same condition, the 36-ply HSPE twisted netting is 3.1% and 3.7% higher than 52-ply PE twisted netting in breaking strength of mesh joint and breaking strength per twine of netting, while in diameter of bar and drag of netting, the former is 19.6% smaller than the latter. (2) The netting strength (including breaking strength of mesh joint and breaking strength per twine of netting) was obtained by applying the ISO1806-2002 standard, SC110-1983 trade standard and the related references to the HSPE and PE twisted netting respectively, and reproducibility tests on netting strength were done as well. The standard deviations of breaking strength of mesh joint of HSPE twisted netting and PE twisted netting are 35.93N and 25.61N respectively; the standard deviations of the reproducibility tests of breaking strength of mesh joint of HSPE twisted netting and PE twisted netting are 31.07N and 36.93N respectively. The standard deviations of breaking strength per twine of netting of HSPE twisted netting and PE twisted netting are 19.91N and 13.49N respectively; the standard deviations of the reproducibility tests of breaking strength per twine of netting of HSPE twisted netting and PE twisted netting are 20.48N and 15.49N respectively; variations of the testing results on netting strength are less than 4%. This means, under the condition of repeat or reproducibility, variation of the testing results are quite small either. (3) The 36-ply HSPE twisted netting is 38.9% smaller than 52-ply PE twisted netting in cost, it is feasible for us to apply the HSPE twisted netting. (4) As a standard, there are some shortcomings in the GB/T4925 obviously, if applied to twisted netting; this suggests that the national organization for fisheries standardization should prepare a modification to GB/T4925. |
| Key words: twisted netting high-strength polyethylene (HSPE) common polyethylene deep water sea cage materials ISO1806 |
