1.1本试验方法包括使用标称零标距长度测定（）作为扁平束的棉纤维的抗拉强度或断裂韧性，或（）作为1/8英寸的扁平束的棉纤维的抗拉强度或断裂韧性和断裂载荷下的伸长率。（3.2-mm）夹具间距。本试验方法适用于未经处理的棉的松散纤维，无论是在加工前获得的还是从纺织产品中获得的。 1.2本试验方法主要设计用于特殊纤维束夹和特殊强度试验仪器，但当配备合适的适配器以容纳纤维夹时，可与其他抗拉强度和伸长率试验机一起使用。 注1-测量纤维束断裂韧性的其他方法包括试验方法D1294，羊毛纤维束断裂强度试验- 1英寸标距； 试验方法D4604，用高容量仪器（HVI）测量棉纤维（运动控制纤维信息系统）；试验方法D4605，用高容量仪器（HVI）测量棉纤维（齐薇格乌斯特公司的Spinlab系统）。 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。每个系统中表示的值可能不是精确的等价物；因此，每个系统必须相互独立使用，不得以任何方式组合值。 1.4本标准无意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和健康实践，并确定监管限制的适用性。

1.1 This test method covers the determination of ( ) the tensile strength or breaking tenacity of cotton fibers as a flat bundle using a nominal zero gage length, or ( ) the tensile strength or breaking tenacity and the elongation at the breaking load of cotton fibers as a flat bundle with 1/8-in. (3.2-mm) clamp spacing. This test method is applicable to loose fibers of untreated cottons whether taken before processing or obtained from a textile product. 1.2 This test method is designed primarily for use with special fiber bundle clamps and special strength testing instruments but may be used with other tensile strength and elongation testing machines when equipped with appropriate adapters to accommodate the fiber clamps. Note 1-Other methods for measuring the breaking tenacity of fiber bundles include Test Method D1294, Test for Breaking Strength of Wool Fiber Bundles-1 in gage Length; Test Methods D4604, Measurement of Cotton Fibers by High Volume Instruments (HVI) (Motion Control Fiber Information System); Test Methods D4605, Measurement of Cotton Fibers by High Volume Instruments (HVI) (Spinlab System of Zellweger Uster, Inc.). 1.3 The values stated in either acceptable metric units or in other units shall be regarded separately as standard. The values expressed in each system may not be exact equivalents; therefore, each system must be used independently of each other, without combining values in any way. 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 and health practices and determine the applicability of regulatory limitations prior to use.