1.1 这两种测试方法包括在密封完成后和冷却至环境温度之前，对柔性腹板的热塑性表面之间形成的热密封强度（热粘强度）进行实验室测量。 1.2 这些测试方法仅限于仪器热粘性测试，需要一台测试机自动对试样进行热密封，并在密封循环结束后的精确测量时间立即确定热密封的强度。另一个先决条件是，在密封顺序开始后，操作员不得对试验产生影响。 这些测试方法不包括使用弹簧、杠杆、滑轮和砝码的非仪器手动程序，其中测试结果可能会受到操作员技术的影响。 1.3 这些试验方法中描述了仪器热粘性试验的两种变体，主要在两个方面有所不同: （a） 密封试样试验过程中的夹持分离率，以及 （b） 无论测试机是生成被测材料的冷却曲线，还是测量在设定的延迟时间后观察到的最大力。这两种测试方法可用于测试这些测试方法范围内以及所用机器的范围和容量内的所有材料。 它们在第节中进行了描述 4. . 1.4 国际单位制是首选单位，应在裁判裁决中使用。本文中以英寸磅单位表示的数值应单独考虑，可能与国际单位制不完全等同。因此，每个系统应独立使用。将两个系统的值组合在一起可能会导致不符合标准。 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）。本标准的使用者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。 设备操作员应注意密封钳口合在一起进行密封时的夹点、钳口的热表面以及用于切割样本的锋利仪器。建议操作员审查设备供应商的安全预防措施。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 在表格填充操作中，包裹的密封区域在仍然很热的情况下经常受到破坏力的影响。如果热密封件对这些力的抵抗力不足，则在包装过程中可能会发生破损。这些测试方法测量热密封强度，可用于表征材料的性能，并对其在商业应用中的性能进行评级，其中该质量至关重要。

1.1 These two test methods cover laboratory measurement of the strength of heatseals formed between thermoplastic surfaces of flexible webs, immediately after a seal has been made and before it cools to ambient temperature (hot tack strength). 1.2 These test methods are restricted to instrumented hot tack testing, requiring a testing machine that automatically heatseals a specimen and immediately determines strength of the hot seal at a precisely measured time after conclusion of the sealing cycle. An additional prerequisite is that the operator shall have no influence on the test after the sealing sequence has begun. These test methods do not cover non-instrumented manual procedures employing springs, levers, pulleys and weights, where test results can be influenced by operator technique. 1.3 Two variations of the instrumented hot tack test are described in these test methods, differing primarily in two respects: (a) rate of grip separation during testing of the sealed specimen, and (b) whether the testing machine generates the cooling curve of the material under test, or instead makes a measurement of the maximum force observed following a set delay time. Both test methods may be used to test all materials within the scope of these test methods and within the range and capacity of the machine employed. They are described in Section 4 . 1.4 SI units are preferred and shall be used in referee decisions. Values stated herein in inch-pound units are to be regarded separately and may not be exact equivalents to SI units. Therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 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. The operator of the equipment is to be aware of pinch points as the seal jaws come together to make a seal, hot surfaces of the jaws, and sharp instruments used to cut specimens. It is recommended that the operator review safety precautions from the equipment supplier. 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 ====== 5.1 In form-fill operations, sealed areas of packages are frequently subject to disruptive forces while still hot. If the hot seals have inadequate resistance to these forces, breakage can occur during the packaging process. These test methods measure hot seal strength and can be used to characterize and rank materials in their ability to perform in commercial applications where this quality is critical.