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现行 ASTM D3775-17(2023)
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Standard Test Method for End (Warp) and Pick (Filling) Count of Woven Fabrics 机织物的端部(经)数和纬(纬)数的标准试验方法
发布日期: 2023-01-01
1.1 该测试方法包括末端(经向)和纬向(纬向)计数的测量,适用于所有类型的机织物。 注1: 从历史上看,织物计数一词一直被用来描述机织织物的末端和末端计数。术语“结束计数”和“拾取计数”正在取代术语“结构计数”,以提供清晰性。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.2.1 在本文档中,有些情况下单位不能转换为1:1。这是为了承认这是一份全球性文件,世界不同地区使用不同的计量单位。使用公制的组织将报告每1厘米的计数。 使用英语系统的组织将报告每1英寸的计数。 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)。本标准的使用者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。 注2: 纬编针织物的纬向和纬向计数的现行试验方法,参见试验方法 D8007 。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 这种测试方法被认为是商业货物验收测试的合格方法,因为它在贸易中被广泛用于此目的。 5.1.1 如果两个实验室(或多个实验室)报告的测试结果之间存在实际意义上的差异,则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。作为最低要求,使用尽可能均匀的样本进行比较测试,这些样本与在初始测试期间产生不同结果的样本来自同一批次的材料,并以相同数量随机分配给每个实验室。 应使用未配对数据的统计测试对相关实验室的测试结果进行比较,这是在测试系列之前选择的概率水平。如果发现偏差,必须找到并纠正其原因,或者必须在考虑已知偏差的情况下调整该材料的未来测试结果。 5.1.2 当在窄方向上测量总宽度上的支数并外推到每厘米(英寸)的纱线数时,该测试方法适用于窄织物。
1.1 This test method covers the measurement of end (warp) and pick (filling) count and is applicable to all types of woven fabrics. Note 1: Historically, the term fabric count has been used to describe the end and pick count of woven fabrics. The terms end count and pick count are replacing the term fabric count, to provide clarity. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.2.1 Throughout this document, there will be some instances in which the units do not convert 1:1. This is to acknowledge that this is a global document and that different parts of the world use different units of measurement. Organizations using the metric system wil report the count per 1 cm. Organizations using the English system will report the count per 1 in. 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. Note 2: For a current test method for the wale and course count of weft knitted fabrics, refer to Test Method D8007 . 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 This test method is considered satisfactory for acceptance testing of commercial shipments because it has been used extensively in the trade for that purpose. 5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such a comparative test that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias. 5.1.2 This test method is suitable for use with narrow fabrics when the count across the total width is measured in the narrow direction and extrapolated to the number of yarns per centimeter (inch).
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归口单位: D13.60
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