ASTM D6207-03(R2019) pdf free download

ASTM D6207-03(R2019) pdf free download.Standard Test Method for Dimensional Stability of Fabrics to Changes in Humidity and Temperature
1. Scope
1.1 This test method covers the determination of the dimen- sional stability of fabrics that are intended for use on panel and screen systems to cycled changes in humidity and temperature. 1.1.1 Panel and screen systems include acoustic panels, free standing screens, office partitions, and furniture systems. 1.2 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. 1.3 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Summary of Test Method
4.1 Dimensional change (growth and shrinkage) data is collected for a specimen offabric that is subjected to controlled cycles of specified relative humidity and temperature condi- tions.
5. Significance and Use
5.1 The measured dimensional stability of a fabric deter- mines whether a fabric has the potential to retain its original shape and remain stable, indicating it will not bubble or sag over time, when applied over a substrate, and its suitability for a specified use. 5.2 This test method is recommended for acceptance testing of commercial shipments however, caution is advised since information about between laboratory precision is incomplete. Comparative tests as directed in 5.2.1 are advisable. 5.2.1 If there are differences of practical significance be- tween reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assis- tance. At a minimum, use the samples for such a comparative test that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias. 5.3 This test method is used in industry to determine if a fabric grows, grows and then shrinks, shrinks and then grows, or remains the same when subjected to a specified range of humidity and temperature conditions.
6. Apparatus
6.1 Environmental Test Chamber, meeting the following criteria: 6.1.1 Capable of testing two specimens at one time, each 150 by 1000, 66 mm (6.0 by 39.0, 60.25 in.) mounted vertically in a single frame. 6.1.2 Capable of a relative humidity range of 15 to 95 %, controllable to 65 %. 6.1.3 Capable of a temperature range of 15 to 35 °C (59 to 95 °F) with a tolerance of 62 °C (64 °F). 6.1.4 Provision for automatic cycling of humidity and temperature conditions. 6.1.5 Having visible humidity and temperature indicators and a continuous recording device (digital readout or plotter). 6.2 Specimen Frame, meeting the following criteria: 6.2.1 Of a size that will fit in the test chamber and hold two specimens, see Fig. 1. 6.2.2 With a means for measuring specimen length of at least 1000 mm (36 in.) in increments of 1 mm (0.05 or 1 ⁄ 16 in.). 6.2.3 With a means for holding and suspending the speci- men vertically. 6.3 Pointers, T-shaped or common straight pins, one per specimen, for reference marks. 6.4 A weight spring clamp, with a mass of 100 6 5 g, one per specimen, to create a uniformly distributed force across the specimen width dimension of 1.00 6 0.05 N (0.22 lbf). 6.4.1 Examples of weighted spring clamps are the paper holders used on the top of clip boards and potato chip bag clamps.