1.1本试验方法包括确定或建议最小应用扭矩，该最小应用扭矩导致完全劣化的拆卸扭矩，其水平大于IA型儿童防护闭合的最大预期反向棘轮扭矩。（见分类D 3475）。 1.2本试验方法提供了一个程序，确保维护IA型儿童防护外壳的相应儿童防护性能。 1.3确定IA型儿童防护封盖最小应用扭矩的一个主要限制是，许多封盖机缺乏测量封盖应用扭矩的能力； 因此，从该方法得出的最小建议必须根据即时拆卸扭矩进行定义。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本试验方法可用于: 比较两种或两种以上IA型闭包的功能。 确定或协助建议最小即时拆卸扭矩或最小应用扭矩，以正确固定IA型儿童- 在评估封闭容器系统的扭矩衰减特性后，对封闭进行了阻力。 对于给定的封闭容器系统，将即时拆卸扭矩与完全降级（长期储存）的拆卸扭矩进行比较。 通过预测反向棘轮虐待，评估儿童抵抗闭合持续功能的一个方面。 在衬里材料、封口材料、容器类型或最初评估的封口容器系统的任何其他变化后，比较给定IA型封口的应用扭矩保持。 通过确定反向棘轮扭矩和拆卸扭矩，确保给定的IA型- 阻力闭合仍在继续发挥其在儿童和成人方案中的作用（16 CFR 1700.20）。

1.1 This test method covers the determination of or the recommendation for minimum application torque that results in a fully degraded removal torque that is at a level greater than the maximum expected reverse-ratchet torque for a Type IA child-resistant closure. (See Classification D 3475). 1.2 This test method provides a procedure that will assure the maintenance of the respective child-resistant properties of Type IA child-resistant closures. 1.3 A major limitation to the determination of minimum application torque of Type IA child-resistant closures is because many cappers lack the capability for measuring closure application torques; therefore, minimal recommendations derived from this method are, of necessity, defined in terms of the immediate removal torques. 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. ====== Significance And Use ====== This test method may be used to: Compare the functioning of two or more kinds of Type IA closures. Determine or aid in the recommendations for minimum immediate removal torque or minimum application torque for the proper securing of Type IA child-resistant closures after evaluation of the torque degradation characteristics of the closure-container system. Compare immediate removal torque to fully degraded, with long-term storage, removal torque for a given closure-container system. Provide for the evaluation of one aspect of child-resistant closure continuous functioning by projected reverse-ratchet abuse. Compare application torque retentions of given Type IA closures following a change in lining material, closure material, container type, or any other change from the closure-container system initially evaluated. Assure by determining reverse-ratchet torques and removal torques, that the given Type IA child-resistant closure is continuing to function as it did during child and adult protocol (16 CFR 1700.20).