1.1 本试验方法提供了一批纱线或人造短纤维或丝束的商业质量测量。本试验方法适用于( 1. )除丝、玻璃、石棉和韧皮外的所有纤维类型的纱线；( 2. )除羊毛、丝绸、玻璃、石棉和韧皮外的所有纤维类型的顶部和条子；和( 3. )人造纤维或丝束，但用于特殊用途的玻璃纤维和其他纤维除外，如植绒纤维( 注1 ). 注1: 有关测量纤维材料质量的其他试验方法，请参阅规程 D2720 . 1.1.1 本试验方法中的取样主要用于验收试验，而不是生产控制。人造纤维生产商通常会持续对商业“批量”产品进行抽样，而不是每次向客户发货。 1.2 商业质量传统上基于三种选择之一，取决于材料的状态:( 1. )在计算中使用商业回潮率的干燥、无纺纱线、短纤维、丝束等；( 2. )在计算中使用商业回潮值的干燥、擦洗纱线、短纤维、丝束等；和( 3. )在计算中使用定义的余量，干燥、冲刷的纱线、短纤维、丝束等。 1.3 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。 1.4 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。 1.5 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 本试验方法被认为是商业运输的纱线或人造短纤维的验收试验的推荐方法。 5.1.1 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，并使用适当的统计协助。 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。 5.2 选项一在其他国家，特别是在欧洲，普遍使用。 4. 5.3 选项二用于计算已生产的长丝纱线的商业质量（某些生产商除外- 变形纱）、人造短纤维和丝束。该选项旨在反映去除纤维润滑剂和加工助剂后剩余的纤维质量。 5.4 选项三用于计算细纱、变形纱、毛条和棉条的商业质量。当材料在CMRU基础上销售时，买方支付纤维润滑剂或其他可移动加工助剂的费用。 5.5 选项四常用于浸渍芳纶。 5.6 当可以证明溶剂萃取或其他测试方法得出相同的结果，或与冲刷程序获得的结果具有恒定比例的结果时，该方法可用于已知产品的常规测试，但不应替代对新材料或未知材料的冲刷。 关于可提取物质的测定，请参阅试验方法 D2257 . 5.6.1 当面漆不能通过水冲刷去除时，经买方和供应商同意，可以用溶剂萃取代替。 5.7 在某些情况下，从纱线、制造的短纤维和丝束中采集的样本可能会迅速改变含水量。因此，需要非常仔细地规划和处理样本，以防止商业质量结果中出现重大偏差。

1.1 This test method provides a measurement of the commercial mass of a shipment of yarn or manufactured staple fiber or tow. This test method applies to ( 1 ) yarn of all fiber types except silk, glass, asbestos, and bast; ( 2 ) tops and slivers of all fiber types except wool, silk, glass, asbestos, and bast; and ( 3 ) manufactured fibers or tow, except glass and other fibers used for special purposes such as flock ( Note 1 ). Note 1: For other test methods for measuring mass of fibrous materials, refer to Practice D2720 . 1.1.1 Sampling in this test method is primarily for use in acceptance testing rather than production control. manufactured fiber producers usually sample for the commercial “mass” of product on an on-going basis rather than each shipment to a customer. 1.2 Commercial mass has been traditionally based on one of three options depending on the state of the material: ( 1 ) dried, unscoured yarn, staple fiber, tow, and so forth, using commercial moisture regain in the calculations; ( 2 ) dried, scoured yarn, staple fiber, tow, and so forth, using commercial moisture regain values in the calculations; and ( 3 ) dried, scoured yarn, staple fiber, tow, and so forth, using a defined allowance in the calculations. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 is considered satisfactory as a referee method for acceptance testing of commercial shipments of yarn or manufactured staple fibers. 5.1.1 If there are differences of 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, 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 a bias is found, either its casuse must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias. 5.2 Option I is in common use in other countries, particularly in Europe. 4 5.3 Option II is used to calculate the commercial mass of as-produced manufactured filament yarns (except some producer-textured yarns), manufactured staple fibers, and tows. This option is intended to reflect the mass of fiber remaining after fiber lubricants and processing aids are removed. 5.4 Option III is used to calculate the commercial mass of spun yarns, textured yarns, tops, and slivers. When materials are sold on a CMRU basis, the purchaser pays for the fiber lubricant or other removable processing aids. 5.5 Option IV is in common use with impregnated aramids. 5.6 When it can be shown that solvent extraction or another method of testing gives the same results, or results that have a constant ratio to those obtained by the scour procedure, that method may be used for routine testing of known production but should not be substituted for a scour on new or unknown material. For the determination of extractable matter, refer to Test Method D2257 . 5.6.1 When the finish is not removable by a water scour, a solvent extraction may be substituted on agreement between the purchaser and the supplier. 5.7 Under certain circumstances, samples taken from yarns and manufactured staple fibers and tows can change moisture content rapidly. For this reason, very careful planning and handling of samples are required to prevent major biases in commercial mass results.