ASTM F1868-98 - 10.6.1998
 
1. Scope

1.1 This test method covers the measurement of the thermal resistance and the evaporative resistance under steady-state conditions, of fabrics, films, coatings, foams, and leathers, including multi-layer assemblies, for use in clothing systems.

1.2 The range of this measurement technique for thermal resistance is from 0.002 to 0.2 K-m2/W and for evaporative resistance is from 0.01 to 1.0 kPa-m2/W.

1.3 The values in SI units shall be regarded as 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 and health practices and determine the applicability of regulatory limitations prior to use.

 
2. Referenced Documents

F1291-22

Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin

F1494-23

Standard Terminology Relating to Protective Clothing

C177-19e1

Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus (Includes all amendments and changes 2/23/2023).

D1518-14

Standard Test Method for Thermal Resistance of Batting Systems Using a Hot Plate (Withdrawn 2023)

F2370-22

Standard Test Method for Measuring the Evaporative Resistance of Clothing Using a Sweating Manikin

E177-20

Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods

E691-23

Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ISO?11092

Textiles-Physiological Effects-Measurement of Thermal and Water-Vapour Resistance Under Steady-State Conditions (Sweating Guarded-Hotplate Test) Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.