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现行 ASTM D7076-10(2021)e1
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Standard Test Method for Measurement of Shives in Retted Flax 测定脱胶亚麻中纤维的标准试验方法
发布日期: 2021-07-01
1.1 本试验方法涵盖了脱胶亚麻中纤维的测量。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题(如有)。本标准的用户有责任在使用前制定适当的安全、健康和环境实践,并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒(TBT)委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 客观确定亚麻质量的标准很少。茎是茎的木质核心,对品质测定有重要影响。 纤维含量将根据加工阶段而变化,并可确定纤维可用于何种产品。光谱数据可准确、准确、快速地测定亚麻纤维中的纤维量。 5.1.1 如果两个或多个实验室的报告测试结果之间存在实际意义上的差异,则这些实验室应使用主管统计协助进行比较测试,以确定它们之间是否存在统计偏差。 至少,从获得有争议的测试结果的材料中提取尽可能均匀的测试样品,并随机等份分配给每个实验室。应使用未配对数据的统计测试对两个实验室的结果进行比较,这是在测试系列之前选择的可能性水平。如果发现偏差,必须找到并纠正其原因,或者考虑到已知偏差,必须调整该纤维样品类型的未来测试结果。 5.2 本试验方法给出了脱胶亚麻纤维的纤维含量数据,可作为以下各项的基础: (1) 估算从脱胶亚麻纤维中获得的制造纤维的净额; (2) 结合其他测量,预测亚麻产品的质量,尤其是其美学特性; (3) 调整加工机械,以最大限度地提高清洁效率;和 (4) 将shive含量与最终产品质量和加工效率联系起来。
1.1 This test method covers the measurement of shives in retted flax. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Few standards exist to objectively determine flax quality. Shive is the woody core of the stem and has an important effect on quality determination. Shive content will vary depending on the stage of processing and can determine in what products the fiber can be used. Spectroscopic data provide an accurate, precise and rapid determination of the amount of shive in flax fiber. 5.1.1 If there are differences of practical significance between reported test results for two or more laboratories, comparative tests should be performed by those laboratories to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples that are as homogeneous as possible are drawn from the material from which the disputed test results were obtained, and are randomly assigned in equal numbers to each laboratory. These results from the two laboratories should be compared using a statistical test for unpaired data, a possibility level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results for that fiber sample type must be adjusted in consideration of the known bias. 5.2 This test method gives data on shive content of retted flax fiber which can be used as a basis for: (1) estimating the net amount of manufacturing fiber obtainable from retted flax fiber; (2) along with other measurements, predicting the quality of flax products, particularly their aesthetic properties; (3) adjusting processing machinery for maximum efficiency in cleaning; and (4) relating shive content to end-product quality and processing efficiency.
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归口单位: D13.17
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