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拉力机紡織品织物拉伸性能标准升级

作者：來源：发布日期： 2020.10.21

信息摘要：

拉力机紡織品织物拉伸性能标准升级

紡織品织物拉伸性能第2部分：断裂强力的测定（抓样法）GB/T 3923.2-1998以及紡織品织物拉伸性能第1部分：断裂强力和断裂伸长率的测定（条样法）GB/T 3923.1-1997刚刚完成升级，升级后的标准分别是GB/T 3923.2-2013和GB/T 3923.1-2013，这两个标准将于明年5月起实施。

紡織品织物拉伸性能分为抓样法和条样法，都是用来测试断裂强力，采用的仪器设备为等速伸长型试验仪，即强力机（拉力机）。标准适用于机织物、针织物、涂层织物等纺织织物。

抓樣法的基本原理是，將試樣中央部位夾持在拉力機特定的夾鉗中，以規定的拉伸速度拉伸試樣，直至試樣斷脫，測定記錄斷裂強力。拉力機的精度等級不低于1級（誤差不大于1%），拉伸速度50mm/min，隔距長度爲100mm。

升級後的標准，將提高對檢測技術的要求，相應對拉力機的要求也在變化，相關企業應做好學習宣貫工作。

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The Curate, of course, had heard nothing about the Clockwork man's other performances; he had scarcely heeded the hints thrown out about the possibility of movement in other dimensions. It seemed to him, in the uncertain light of their surroundings, that the Clockwork man's right arm gradually disappeared into space. There was no arm there at all. Afterwards, he remembered a brief moment when the arm had begun to grow vague and transparent; it was moving very rapidly, in some direction, neither up nor down, nor this way or that, but along some shadowy plane. Then it went into nothing, evaporated from view. And just as suddenly, it swung back into the plane of the curate's vision, and the hand at the end of it grasped a silk hat. Good fitting is often not so much a question of skill as of the standard which a workman has fixed in his mind, and to which all that he does will more or less conform. 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