1.1 这些实践包括热封的实验室制备。这些实践还包括热封强度数据的处理和评估，以确定柔性屏障材料的热封性。它不包括生产设备所需的验证程序。 1.2 本标准不包括由这些做法形成的热密封的密封强度或其他性能测试。参考测试方法 F88 用于测试热封强度。这些实践不适用于测试方法中涵盖的热粘性测试 F1921 . 1.3 本标准的实践仅限于使用采用热棒或冲击密封方法或两者兼有的密封剂制备热密封。 1.4 这些实践旨在帮助建立密封柔性屏障材料的起始关系。关于如何在商业/生产密封设备上设置柔性屏障材料的密封条件，可能需要额外的指导。 1.5 可以在相同或不同材料的腹板之间进行密封。单个腹板可以是结构均匀的或多层的（共挤、涂覆、层压等）。 1.6 用试验方法测量的热封强度 F88 是评估这些实践中使用的热密封性的唯一标准。 1.7 热密封性的其他方面，例如密封连续性，通常通过漏气、染料渗透、目视检查、微生物渗透或其他技术来测量，不在这些实践中涵盖。 1.8 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.9 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。 1.10 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 这些实践有助于确定柔性屏障材料的实验室热密封性。虽然有必要具有为应用提供足够密封强度的热封层，但其他材料特性（如整体结构和厚度）将影响材料的密封性能。这些实践允许测量材料特性变化对热密封性的影响。 4.2 由于实验室热封机和制造设备之间的差异（例如，规模、密封区域大小和处理速度），实验室热封机的能力和输出与制造设备的能力和输出之间可能存在显著差异。 因此，在将这些实践中概述的热封曲线研究应用于制造设备时，必须小心。热密封曲线和相应的密封强度数据旨在为确定全尺寸制造设备的密封条件提供起点。

1.1 These practices cover laboratory preparation of heat seals. These practices also cover the treatment and evaluation of heat seal strength data for the purpose of determining heat sealability of flexible barrier materials. It does not cover the required validation procedures for the production equipment. 1.2 Testing of seal strength or other properties of the heat seals formed by these practices is not included in this standard. Refer to Test Method F88 for testing heat seal strength. These practices do not apply to hot tack testing, which is covered in Test Methods F1921 . 1.3 The practices of this standard are restricted to preparing heat seals using a sealer employing hot-bar or impulse sealing methods, or both. 1.4 These practices are intended to assist in establishing starting relationships for sealing flexible barrier materials. Additional guidance may be needed on how to set up sealing conditions for flexible barrier materials on commercial/production sealing equipment. 1.5 Seals may be made between webs of the same or dissimilar materials. The individual webs may be homogeneous in structure or multilayered (coextruded, coated, laminated, and so forth). 1.6 Strength of the heat seal as measured by Test Method F88 is the sole criterion for assessing heat sealability employed in these practices. 1.7 Other aspects of heat sealability, such as seal continuity, typically measured by air-leak, dye penetration, visual examination, microorganism penetration, or other techniques, are not covered by these practices. 1.8 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.9 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. 1.10 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 These practices facilitate the determination of laboratory heat sealability of flexible barrier materials. While it is necessary to have a heat seal layer that provides adequate seal strength for the application, other material properties, such as the overall construction and thickness, will impact the sealing properties of the material. These practices allow the impact of changes in material properties on heat sealability to be measured. 4.2 Due to differences between a laboratory sealer and manufacturing equipment (for example, scale, size of sealing area, and processing speed), there may be a significant difference between the capability and output of a laboratory heat sealer and that of manufacturing equipment. Hence, care must be taken when applying a heat seal curve study as outlined in these practices to manufacturing equipment. The heat seal curve and the corresponding seal strength data are intended to provide a starting point for determination of sealing conditions for full scale manufacturing equipment.