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1.1 This test method covers the determination of the overall thermal transmission coefficients due to the combined action of conduction, convection, and radiation for dry specimens of textile fabrics, battings, and other materials within the limits specified in 1.2. It measures the time rate of heat transfer from a warm, dry, constant-temperature, horizontal flat-plate up through a layer of the test material to a relatively calm, cool atmosphere.
1.2 For practical purposes, this test method is limited to determinations on specimens of fabrics, layered fabric assemblies, and battings having thermal transmittances (U2, as defined in 3.1.2) within a range of 0.7 to 14 W/m2K and thicknesses not in excess of 50 mm.
1.3 The coefficients obtained apply strictly only to the particular specimens tested and for the specified thermal and environmental conditions of each test. This test method gives values that are valid for comparison under the same conditions of test, that is, with the specified air velocity, temperature difference between the warm plate and the cool air, and air gap for measuring cool air temperature.
1.4 The values stated in metric units are to be regarded as the standard. Conversion factors, for thermal conductance and conductivity and thermal resistance and resistivity, to other units in common use are given in 1-5
1.5 This standard does not purport to address the safety concerns associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D123 Terminology Relating to Textiles
D3776 Test Methods for Mass Per Unit Area (Weight) of Fabric
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
F1291 Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
F1494 Terminology Relating to Protective Clothing
F1720 Test Method for Measuring Thermal Insulation of Sleeping Bags Using a Heated Manikin
F1868 Test Method for Thermal and Evaporative Resistance of Clothing Materials Using a Sweating Hot Plate
F2370 Test Method for Measuring the Evaporative Resistance of Clothing Using a Sweating Manikin
ISO StandardsISO 11092 Textiles-Physiological Effects-Measurement of Thermal and Water-Vapour Resistance Under Steady-State Conditions (Sweating Guarded-Hotplate Test) ISO 9073-2 Textile--Test Methods for Nonwovens--Part 2: Determination of Thickness
ICS Number Code 59.080.30 (Textile fabrics)
UNSPSC Code 11162400(Batting); 30141500(Thermal insulation)
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ASTM D1518-85(2003), Standard Test Method for Thermal Transmittance of Textile Materials, ASTM International, West Conshohocken, PA, 1985, www.astm.orgBack to Top