【国外标准】 Standard Test Methods for Characterizing Thermoplastic Fabrics Used in Roofing and Waterproofing

AbstractThese test methods cover the procedures for characterizing thermoplastic fabrics (for example polyester, polyamide, polypropylene, and so forth) used in prefabricated roofing and waterproofing membranes. The procedures appear in the following order: (1) unit mass, (2) thickness, (3) breaking load, elongation at break, and work-to-break, (4) trapezoid tearing strength, (5) puncture strength (6) static heat stability, and (7) dynamic heat stability. Sampling, test specimen preparation and conditioning, and calculations (including rupturing load and percentage change in length for puncture strength and heat stability, respectively) for the procedures are detailed. The test apparatus for the procedures are as follows: breaking load, elongation at break, and work-to-break: CRE machine; puncture strength: tensile testing machine, ring clamp attachment, and solid steel rod; static heat stability: self-supporting aluminum mounting board, oven, ruler, clips, timing device, and marking pen; dynamic heat stability: self-supporting aluminum mounting board, oven, bulldog clamps, ruler, hook weight set, timing device, and marking pen. The solid steel rod for the puncture strength test apparatus is illustrated.1.1 These test methods cover the procedures for characterizing thermoplastic fabrics (for example polyester, polyamide, polypropylene, and so forth) used in prefabricated roofing and waterproofing membranes.1.2 Procedures appear in the following order:  SectionUnit Mass 3Thickness 4Breaking Load, Elongation, and Work-to-Break 5Trapezoid Tearing Strength 6Puncture Strength 7Static Heat Stability 8Dynamic Heat Stability 91.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.1.4 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.1.5 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.