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现行 ASTM D7149-05(2021)
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Standard Practice for Determining the Freeze Thaw Stability of Adhesives 确定粘合剂冻融稳定性的标准实践
发布日期: 2021-04-01
1.1 本规程确定了粘合剂在特定温度下承受反复冻融循环的能力,而物理性能没有任何显著变化。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 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。 1.4 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 本规程将提供一个程序,用于确定粘合剂在特定温度下承受五个重复循环或其他规定的冻融的稳定性。 4.2 该实践将允许用户确定在冷冻和解冻循环后是否可以适当涂抹粘合剂。 4.3 本规程将确定在特定温度下冷冻和解冻五个周期后,或按照其他规定,产品制造粘度的任何重大变化。 4.4 该做法将有助于确定粘合剂的pH值是否因冷冻和解冻循环而发生显著变化。
1.1 This practice determines the ability of an adhesive to withstand repeated freezing and thawing cycles at specific temperatures without any significant change in physical properties. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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. 1.4 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 This practice will provide a procedure for determining the stability of an adhesive to withstand five repeated cycles, or as otherwise specified, of freezing and thawing at a specific temperature. 4.2 This practice will allow the user to determine whether or not the adhesive can be appropriately applied after cycling of freezing and thawing. 4.3 This practice will identify any significant changes in the manufactured viscosity of the product after five cycles, or as otherwise specified, of freezing and thawing at a specific temperature. 4.4 This practice will help determine if the pH of adhesive has changed significantly due to the freezing and thawing cycles.
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归口单位: D14.10
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