ASTM C1258隔热用蒸汽缓凝剂耐高温和耐湿度性能标准试验方法
日期:2012-02-13 21:23
itions.
1. Scope
1.1 This test method covers the determination of the aging resistance of flexible low permeance vapor retarders for thermal insulation as classified in Specification C 1136. Water vapor permeance measurement and visual inspection after exposure at elevated temperature and humidity are used to assess vapor retarder response.
1.2 Typical vapor retarders applicable to this test method that are intended for indoor use include foil-scrim-kraft laminates, metallized polyester-scrim-kr
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