1.1 这些测试方法涵盖了纺织纤维和长丝单位长度质量（线密度）的测量。包括对卷曲和未卷曲纤维进行修改的直接称重和振动镜程序。选项和部分如下所示。 选项 小节 A-纤维束称重 7 – 15 B-单纤维称重 16 – 23 C-振动计，概述 24 – 30 35和 36 C1非卷边光纤 31和 32 C2卷曲纤维 33和 34 精度和偏差 37和 38 注1: 有关短纱线的线密度，请参考测试方法 D1059号 . 关于棉花线密度，请参阅测试方法 D1769 和 D2480 . 关于羊毛直径的测量，请参阅测试方法 D1282 , D2130 和 D3510 . 1.2 纤维的卷曲、锥度和横截面形状可能会影响单纤维称重和振动计测量的线密度。 1.3 这些测试方法测量与测试纺织品的标准大气平衡的水分纤维的线密度。这些条件下的纤维水分不一定与纤维的商业回潮率相同。 1.4 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不是精确的等价物；因此，每个系统应相互独立使用。 合并两个系统的值可能会导致不符合规范。 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 试验方法集束称重的选项A D1577 在贸易中用于商业装运的验收测试。验收测试可使用单纤维称重的选项B和振动计的选项C（见第节） 37 ); 然而，建议在使用选项B或选项C时小心，因为实验室之间的精度信息不完整。按照中的指示进行比较测试 4.1.1 可能是可取的。 4.1.1 如果因使用测试方法时报告的测试结果的差异而产生争议 D1577 对于商业装运的验收测试，买方和供应商应进行比较测试，以确定其实验室之间是否存在统计偏差。 建议为调查偏差提供称职的统计协助。作为最低要求，双方应尽可能从大量相关类型材料中采集一组同质样品。然后，应将这些样品以相同数量随机分配给每个实验室进行测试。在开始测试之前，应使用适当的统计分析和双方选择的概率水平对两个实验室的平均结果进行比较。如果发现偏差，必须找到原因并纠正，或者买方和供应商必须同意在考虑已知偏差的情况下解释该材料的未来测试结果。 4.2 包裹称重的选项A通常被视为验收测试的参考程序。 4.3 不建议使用选项A测量具有不同标称线密度的生产纤维混合物的线密度。 4.4 通过选项A和B获得的线密度值的精度取决于纤维切割和称重的精度。 注2: 在短短纤上，切割精度为1.0 % 很难获得。如果纤维中存在卷曲，则该问题更加复杂。 4.4.1 称重精度可以通过组成束的纤维数量来控制。 然而，对于低线密度的短纤维，除非束质量保持较低，否则要计数的纤维数量将变得不可接受。 4.5 方案A和B是基本程序，用于标准化方案C1和C2中使用的振动计设备。 4.6 当需要对同一试样进行进一步测试时，测试方法选项B和C最适用于测量单纤维的线密度，例如，拉伸测试和调整获得的试样线密度数据。与根据比重和显微镜测量的交叉点进行计算相比，这些选项在准确性和操作简便性方面具有优势- 截面面积。 4.7 选项C的附加信息见第节 26 .

1.1 These test methods cover the measurement of mass per unit length (linear density) of textile fibers and filaments. Direct weighing and vibroscope procedures with modifications for crimped and uncrimped fibers are included. The options and sections are listed below. Option Sections A—Fiber Bundle Weighing 7 – 15 B—Single-Fiber Weighing 16 – 23 C—Vibroscope, General 24 – 30 35 and 36 C1—Uncrimped Fibers 31 and 32 C2—Crimped Fibers 33 and 34 Precision and Bias 37 and 38 Note 1: For linear density of short lengths of yarn, refer to Test Method D1059 . For cotton linear density, refer to Test Methods D1769 and D2480 . For measurement of wool diameter, refer to Test Methods D1282 , D2130 , and D3510 . 1.2 The crimp, taper, and cross-sectional shape of the fiber may influence the linear density measured by single-fiber weighing and vibroscope. 1.3 These test methods measure the linear density of fibers with moisture in equilibrium with the standard atmosphere for testing textiles. The fiber moisture under these conditions is not necessarily the same as the commercial moisture regain for the fibers. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. 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 Option A for bundle weighing of Test Method D1577 is used in the trade for acceptance testing of commercial shipments. Option B for single-fiber weighing and Option C for the vibroscope may be used for acceptance testing (see Section 37 ); however, caution is advised when using Option B or Option C because between-laboratory precision information is incomplete. Comparative tests as directed in 4.1.1 may be advisable. 4.1.1 In case of dispute arising from differences in reported test results when using Test Method D1577 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of samples that are as homogeneous as possible and that are from a lot of material of the type in question. These samples should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using the appropriate statistical analysis and a probability level chosen by the two parties before testing is begun. If a bias is found, either the cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results for that material with consideration to the known bias. 4.2 Option A for bundle weighing is generally considered to be the referee procedure for acceptance testing. 4.3 Option A is not recommended for measurement of linear density of blends of production fibers having different nominal linear densities. 4.4 The accuracy of the linear density values obtained by Options A and B is dependent upon the accuracy with which the fibers can be cut and weighed. Note 2: On short staple fiber, an accuracy in cutting of 1.0 % is difficult to obtain. This problem is further complicated if crimp is present in the fibers. 4.4.1 The accuracy of weighing can be controlled by the number of fibers composing the bundle. However, with short fiber of low linear density the number of fibers to be counted becomes prohibitive unless the bundle mass is kept low. 4.5 Options A and B are fundamental procedures which are used to standardize the vibroscope equipment used in Options C1 and C2. 4.6 Test Method Options B and C are most useful for the measurement of linear density of single fibers when further tests upon the same test specimen are required, for example, tension tests and adjustment of the data obtained for the linear density of the test specimen. These options offer advantages in accuracy and ease of operations over calculation from specific gravity and microscopically measured cross-sectional area. 4.7 Additional information specific to Option C is in Section 26 .