1.1 本试验方法测定了织物的抗勾挂性。 1.2 对织物钩伤的研究表明，该试验方法适用于由变形或未变形长丝纱或纺纱或这些纱线的组合制成的一系列机织物和针织物。 2. , 3. 本试验方法不适用于（1）开放式结构织物（如网），因为试验箱中的针会卡住豆袋而不是样本，（2）无法制成豆袋盖的厚重或坚硬织物，以及（3）簇绒或非织造织物，因为该设备设计用于机织物和针织物。 1.3 以可接受的公制单位或其他单位表示的值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统必须相互独立使用，不得以任何方式组合值。如果是裁判决定，以公制单位为准。 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。 第节给出了具体的预防说明 7. . 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 验收测试- 该测试方法可用于商业运输织物的验收测试，因为精度是可接受的（见 15.1 ). 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，在测试系列之前选择的概率水平上，对相关实验室的测试结果进行比较。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 本试验方法可用于制造商、零售商和用户在不同织物的制造和产品比较过程中对织物进行质量控制试验。研究人员也可以使用该测试方法来检查新纤维、纱线、织物结构和整理剂对织物抗钩伤性的影响。 5.3 本试验方法可用于测试大多数服装和家居织物的抗勾挂性。然而，不同的测试方法（参见 5.3.1 )可能需要用于不同类型的织物和不同的最终用途（如毛巾、泳衣、休闲裤和室内装潢）。 5.3.1 中描述了一些可能不适合本试验方法的织物 1.2 . 使用AATCC测试方法可以测试许多开放式结构织物的抗勾挂性 65、许多厚重或坚硬的织物可以使用测试方法进行抗勾挂性测试 D3939 . 可以通过试验方法测试许多桩地板覆盖物的抗勾挂性 D1335 . 5.4 由于织物挂网可能会受到洗涤或干洗的影响，因此建议在洗涤或干洗前后测试织物的抗挂网性能。 5.5 特定织物的抗钩伤性因个人穿着者和一般使用条件而异。 因此，可以预计，同一面料的服装在磨损后将显示出相当广泛的抗勾伤谱，并且磨损变化比经过受控实验室测试的复制面料样本大得多。当对任何包括防挂接性的规范采用可接受水平时，应考虑该因素。 5.6 在旧衣服上观察到的障碍物在数量和外观上都有很大差异。障碍的出现尤其取决于（1） 障碍物和织物周围区域之间的颜色对比度，或（2） 长变形或长突起的存在。当仅根据障碍数量对障碍进行评级时，不会评估这些条件。有关颜色对比度、失真和突起等术语的描述，请参见第3节 无花果。1- 3. . 由于特定织物的整体可接受性取决于障碍物的特性和影响织物外观的其他因素，因此建议在实验室测试的织物应根据可目视观察到的缺陷进行评估，而不仅仅根据产生的障碍物数量进行评级。 一系列视觉评级标准（见 6.7 )可以设置为评级提供基础。当测试的实验室样本在外观上与磨损测试的织物密切相关时，视觉评级标准最为有利；例如，当测试实验室样本和磨损测试的织物时，显示出类似的颜色对比。在前面的示例中，磨损试验中的一系列织物将是中所述织物标准的良好选择 6.7.2 . 此外，还可以使用考虑障碍数量和障碍外观的评分系统。（参见 13 有关障碍、突出、扭曲和颜色对比的更多信息。另外，请参见 无花果。1- 3. ). 图1 有许多突起但没有变形的锯齿状样本 图2 包括突出和变形的障碍 图3 具有颜色对比的锯齿状样本（纱线从深色区域转移到浅色区域

1.1 This test method determines the snagging resistance of a fabric. 1.2 Studies of fabric snagging have shown that this test method is suitable for a range of woven and knitted fabrics made from textured or untextured filament yarns or spun yarns or combinations of these yarns. 2 , 3 This test method is not suitable for (1) open construction fabrics (such as a net) because the pins in the test chamber will snag the bean bag rather than the specimen, (2) heavy or stiff fabrics that cannot be made into a cover for the bean bag, and (3) tufted or nonwoven fabrics because the apparatus is designed for woven and knitted fabrics. 1.3 The values stated in either acceptable metric units or in other units shall be regarded separately as standard. The values stated in each system may not be the exact equivalents; therefore, each system must be used independently of the other, without combining values in any way. In case of referee decisions the metric units will prevail. 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. Specific precautionary statements are given in Section 7 . 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 Acceptance Testing— This test method may be used for acceptance testing of commercial shipments of fabrics because the precision is acceptable (see 15.1 ). 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 number to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, at 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. 5.2 This test method may be used for quality control testing of fabrics during manufacturing and product comparisons of different fabrics by manufacturers, retailers, and users. This test method may also be used by researchers to examine the effect of new fibers, yarns, fabric constructions, and finishes on the snagging resistance of fabrics. 5.3 This test method may be used to test the snagging resistance of most apparel and home furnishings fabrics. However, a different test method (see 5.3.1 ) may be needed for different types of fabrics and different end-uses (such as towels, swimwear, slacks, and upholstery). 5.3.1 Some fabrics which may not be suitable for this test method are described in 1.2 . Many open construction fabrics can be tested for snagging resistance using AATCC Test Method 65. Many heavy or stiff fabrics can be tested for snagging resistance using Test Method D3939 . The snagging resistance of many pile floor coverings can be tested by Test Method D1335 . 5.4 Because fabric snagging can be affected by laundering or drycleaning, it may be advisable to test the snagging resistance of a fabric before and after laundering or drycleaning. 5.5 The snagging resistance of a specific fabric varies with individual wearers and general conditions of use. Therefore, it can be expected that garments of the same fabric will show a fairly wide snagging resistance spectrum after wear and much greater variation in wear than in replicate fabric specimens subjected to controlled laboratory tests. This factor should be considered when adopting levels of acceptability for any specification that includes snagging resistance. 5.6 Snags observed in worn garments vary appreciably in number and appearance. The appearance of a snag depends particularly on (1) the degree of color contrast between the snag and the surrounding area of the fabric, or, (2) the presence of long distortions or long protrusions. These conditions are not evaluated when snagging is rated solely on the number of snags. See Section 3 for a description of terminology such as color contrast, distortion, and protrusion See Figs. 1- 3 . Because the overall acceptability of a specific fabric is dependent on both the characteristics of the snags and other factors affecting fabric appearance, it is recommended that fabrics tested in the laboratory be evaluated with regard to the defects which may be visually observed and not rated solely on the number of snags developed. A series of visual rating standards (see 6.7 ) may be set up to provide a basis for the ratings. The visual rating standards are most advantageous when the tested laboratory specimens correlate closely in appearance with fabrics from a wear test; for example when tested laboratory specimens and fabrics from a wear test show similar color contrasts. In the preceding example, a series of fabrics from the wear test would be a good choice for the fabric standards described in 6.7.2 . Also a point rating system may be used that considers the number of the snags and the appearance of the snags. (See 13 for additional information about snags, protrusions, distortions, and color contrasts. Also, see Figs. 1- 3 ). FIG. 1 A Snagged Specimen With Many Protrusion But No Distortions FIG. 2 A Snag That Includes Both a Protrusion and a Distortion FIG. 3 A Snagged Specimen With Color Contrasts (Yarn Shifted from Dark Area to Light Area