1.1 这些测试方法可用于评估任何纤维的缝纫线。 1.1.1 本标准中的试验方法旨在仅评估从线夹取的缝纫线。 1.2 这些测试方法仅用于测量缝纫线的物理特性。这些试验方法不涉及在特定最终使用条件下对缝纫线的满意性能可能重要的任何其他特性。 1.3 这些测试方法可用于测量以下特性: 小节 耐干洗色牢度 73 – 83 耐洗涤色牢度 62 – 72 耐水迁移色牢度 84 – 94 直径 43 – 50 每个螺纹固定器的长度 34 – 42 收缩率，单股 51 – 61 干热 58.1 沸水 58.2 强度和伸长率 15 – 21 单链调节 19.1.1 单股湿式 19.1.2 回路强度 19.2 打结强度 19.3 扭曲 22 – 27 扭转天平 28 – 33 纱线编号 7 – 14 注1: 有关预处理接缝的测试方法，请参阅测试方法 D1683/D1683M 和 D3940 . 1.4 以国际单位制表示的数值应视为标准值。 国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.5 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。 1.6 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====== 4.1 验收测试- 试验方法中的试验方法 D204 除非个别测试方法中另有规定，否则对于缝纫线性能的测定，认为其符合商业运输的验收测试要求。这些测试方法是可用的最佳方法，在行业中广泛使用。 4.1.1 如果两个实验室（或更多实验室）的报告测试结果之间存在实际意义上的差异，则应进行比较测试，以确定它们之间是否存在统计偏差，使用适当的统计辅助。 作为最低要求，使用尽可能同质的样品进行比较试验，从与初始试验期间产生不同结果的样品相同批次的材料中提取，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，或者考虑到已知偏差，必须调整该材料的未来测试结果。

1.1 These test methods can be used to evaluate sewing threads of any fiber. 1.1.1 The test methods in this standard are intended to evaluate only sewing thread taken from thread holders. 1.2 These test methods only provide for the measurement of sewing thread physical properties. These test methods do not address any other properties that may be important for the satisfactory performance of sewing threads under particular end use conditions. 1.3 These test methods can be used to measure the following properties: Sections Colorfastness to Drycleaning 73 – 83 Colorfastness to Laundering 62 – 72 Colorfastness to Water Migration 84 – 94 Diameter 43 – 50 Length per Thread Holder 34 – 42 Shrinkage, Single Strand 51 – 61 Dry Heat 58.1 Boiling Water 58.2 Strength and Elongation 15 – 21 Single Strand—Conditioned 19.1.1 Single Strand—Wet 19.1.2 Loop Strength 19.2 Knot Strength 19.3 Twist 22 – 27 Twist Balance 28 – 33 Yarn Number 7 – 14 Note 1: For methods covering tests on prepared seams, refer to Test Methods D1683/D1683M and D3940 . 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 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. 1.6 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 ====== 4.1 Acceptance Testing— The test methods in Test Methods D204 for the determination of the properties of sewing thread are considered satisfactory for acceptance testing of commercial shipments of sewing thread, unless specified in the individual test method. These test methods are the best available and are used extensively in the trade. 4.1.1 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 tests 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 a 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.