1.1 本试验方法包括测定人造短纤维的卷曲频率。该测试方法适用于所有卷曲的短纤维，前提是卷曲可以二维地视为正弦波配置。 1.1.1 应该认识到，纱线制造工艺或对制造纱线的处理会影响或改变纤维的卷曲。因此，在制造或处理过程之前，从纺纱中提取的纤维的卷曲值可能与相同纤维不同。 1.2 提供了三种制备试样的方法。选项一（首选）使用单纤维作为试样，具有低放大倍数，选项二（可选用于短纤维或丝束样品）使用纤维碎片作为试样，选项三使用单纤维的投影图像。 1.3 以国际单位制表示的值应被视为标准。括号内的英寸-磅单位仅供参考。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 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 这种用于测定人造短纤维卷曲频率的测试方法可用于商业运输的验收测试，但建议谨慎，因为已知实验室之间的精度较差。按照指示进行的比较测试 5.1.1 可能是明智的。 5.1.1 如果两个（或多个）实验室报告的测试结果之间存在差异或实际意义，应使用合格的统计辅助进行比较测试，以确定它们之间是否存在统计偏差。作为最低要求，从获得不同测试结果的材料中提取尽可能均匀的测试样品，并以相等的数量随机分配给每个实验室进行测试。两个实验室的测试结果应使用未配对数据的统计检验进行比较，其概率水平应在测试系列之前选择。如果发现偏差，则必须找到并纠正其原因，或者必须根据已知的偏差调整该材料的未来测试结果。 5.2 本试验方法用于质量控制。这是一种简单的程序，在检测卷曲频率的主要差异方面特别有用。在可能需要微小差异或更完整的卷曲特征（包括振幅和指数）的研究和开发中，这种测试方法被认为没有用。 5.3 纤维卷曲会影响梳理和随后将纤维加工成纱线或非织造布。 5.4 纤维中的短纤维卷曲也会影响纱线的蓬松度或开度，从而影响成品纺织产品的手感和视觉外观。

1.1 This test method covers the determination of the crimp frequency of manufactured staple fibers. This test method is applicable to all crimped staple fibers provided the crimp can be viewed two-dimensionally as a sine-wave configuration. 1.1.1 It should be recognized that yarn manufacturing processes or treatments to manufactured yarns can influence or modify crimp in fiber. Hence, the value for crimp of fibers taken from spun yarns may be different than that of the same fiber prior to the manufacturing or treatment processes. 1.2 Three options are provided for preparation of the specimens. Option One (preferred) uses single fibers for the specimens with a low magnification available, Option Two (optional for staple or tow samples) uses fiber chips as the specimens, and Option Three uses projected images of single fibers. 1.3 The values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses are for information only. 1.4 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. 1.5 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 for the determination of crimp frequency of manufactured staple fibers may be used for the acceptance testing of commercial shipments but caution is advised since between-laboratory precision is known to be poor. Comparative tests conducted as directed in 5.1.1 may be advisable. 5.1.1 If there are differences or practical significance between reported test results for two laboratories (or more), comparative tests should be performed 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, drawn from the material from which the disparate test results were obtained, and randomly assigned in equal numbers to each laboratory for testing. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to 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. 5.2 This test method is used for quality control. It is an unsophisticated procedure which is particularly useful in detecting major differences in crimp frequency. This test method is not considered to be useful in research and development where minor differences or more complete crimp characterization, including amplitude and index, may be necessary. 5.3 Crimp in fiber affects the carding and subsequent processing of the fiber into either a yarn or a nonwoven fabric. 5.4 Staple crimp in fiber will also affect the bulk or openness of a yarn and therefore the hand and visual appearance of the finished textile product.