Citation:

Costas, P. AND A. Schwope. LABORATORY EVALUATION OF THE LOW TEMPERATURE CHARACTERISTICS OF FOUR PROTECTIVE CLOTHING MATERIALS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-91/001 (NTIS PB91148452), 1991.

Description:

The objective of this study was to evaluate several low-temperature characteristics of Challenge 5100, a new protective clothing material developed by Chemical Fabrics Corporation. he low temperature characteristics of three other protective clothing materials were also evaluated and used as a basis for comparison and interpretation of the challenge results. he other clothing materials were chlorinated polyethylene, polyvinyl chloride/nylon, and butyl/nylon/butyl. The stiffness of the materials was measured as a function of temperature by means of a torsion test, and a cantilever bending test. he hardness of the materials was measured by durometer, ASTM D2240. easurements were made at five temperatures, from -32 degrees to 23 degree C. he results of the two stiffness tests performed indicate that the stiffening characteristics of the Challenge 5100 material as a function of temperature are comparable to those of polyvinyl chloride/nylon. hlorinated polyethylene exhibited the most stiffening as the temperature was lowered, and butyl/nylon/butyl exhibited the least stiffening. he results of the hardness measurements indicate similar material performance. ince the results of both stiffness tests are in agreement with the known field performances of the materials, either test method can be used to evaluate clothing materials. Because the Challenge material performance was similar to that of polyvinyl chloride/nylon a material which is not known to pose difficulties at low temperatures, it is not expected that the Challenge material will become objectionably stiff at low temperatures.

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