Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures
The U.S. Coast Guard is evaluating the use of divers under ice as one means of oil-spill surveillance in arctic and subarctic regions. The degree of thermal protection provided to the diver by presently approved suits, which are made of neoprene foam lined on one or both sides by nylon fabric, under...
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ftdtic:ADA121827 2023-05-15T15:10:33+02:00 Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures Sinnarwalla, Abbas M. Sundaram, T. R. T S ASSOCIATES INC COLUMBIA MD 1981-02 text/html http://www.dtic.mil/docs/citations/ADA121827 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA121827 en eng http://www.dtic.mil/docs/citations/ADA121827 Approved for public release; distribution is unlimited. DTIC AND NTIS Protective Equipment Life Support Systems *THERMAL PROPERTIES *NYLON *DIVING SUITS *FOAM RUBBER *NEOPRENE POLAR REGIONS DENSITY MEASUREMENT TEST METHODS LENGTH PROTECTION OILS OIL SPILLS DIVING IMMERSION SURVEILLANCE PROTECTIVE CLOTHING ABSORPTION THERMAL CONDUCTIVITY MIXTURES VOLUME LOW TEMPERATURE EXPOSURE(GENERAL) WATER Text 1981 ftdtic 2016-02-22T05:56:42Z The U.S. Coast Guard is evaluating the use of divers under ice as one means of oil-spill surveillance in arctic and subarctic regions. The degree of thermal protection provided to the diver by presently approved suits, which are made of neoprene foam lined on one or both sides by nylon fabric, under the combined action of oil, water and frigid temperature is not known. The present report describes the results of a laboratory study in which any changes in the thermal and physical properties of the suit material were assessed through systematic tests on small samples (12 in x 12 in) when they were kept immersed in various oils and oil-water mixtures at various temperatures (-4 c to +10 c) and periods of time (5 to 22 hours). Physical (length, volume, density) and thermal (conductivity) properties of the samples were measured before and after each test. The results show that, although the suit material performs well in general, under certain conditions the fabric lining as well as the foam absorb some oil and that this absorbed oil cannot be removed easily either by physical expression or by cleaning with commonly available detergents. The absorbed oil leads to some increases in density and in thermal conductivity, with the latter change for the 'Worst case' being about 35%. Text Arctic Subarctic Defense Technical Information Center: DTIC Technical Reports database Arctic |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Protective Equipment Life Support Systems *THERMAL PROPERTIES *NYLON *DIVING SUITS *FOAM RUBBER *NEOPRENE POLAR REGIONS DENSITY MEASUREMENT TEST METHODS LENGTH PROTECTION OILS OIL SPILLS DIVING IMMERSION SURVEILLANCE PROTECTIVE CLOTHING ABSORPTION THERMAL CONDUCTIVITY MIXTURES VOLUME LOW TEMPERATURE EXPOSURE(GENERAL) WATER |
spellingShingle |
Protective Equipment Life Support Systems *THERMAL PROPERTIES *NYLON *DIVING SUITS *FOAM RUBBER *NEOPRENE POLAR REGIONS DENSITY MEASUREMENT TEST METHODS LENGTH PROTECTION OILS OIL SPILLS DIVING IMMERSION SURVEILLANCE PROTECTIVE CLOTHING ABSORPTION THERMAL CONDUCTIVITY MIXTURES VOLUME LOW TEMPERATURE EXPOSURE(GENERAL) WATER Sinnarwalla, Abbas M. Sundaram, T. R. Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures |
topic_facet |
Protective Equipment Life Support Systems *THERMAL PROPERTIES *NYLON *DIVING SUITS *FOAM RUBBER *NEOPRENE POLAR REGIONS DENSITY MEASUREMENT TEST METHODS LENGTH PROTECTION OILS OIL SPILLS DIVING IMMERSION SURVEILLANCE PROTECTIVE CLOTHING ABSORPTION THERMAL CONDUCTIVITY MIXTURES VOLUME LOW TEMPERATURE EXPOSURE(GENERAL) WATER |
description |
The U.S. Coast Guard is evaluating the use of divers under ice as one means of oil-spill surveillance in arctic and subarctic regions. The degree of thermal protection provided to the diver by presently approved suits, which are made of neoprene foam lined on one or both sides by nylon fabric, under the combined action of oil, water and frigid temperature is not known. The present report describes the results of a laboratory study in which any changes in the thermal and physical properties of the suit material were assessed through systematic tests on small samples (12 in x 12 in) when they were kept immersed in various oils and oil-water mixtures at various temperatures (-4 c to +10 c) and periods of time (5 to 22 hours). Physical (length, volume, density) and thermal (conductivity) properties of the samples were measured before and after each test. The results show that, although the suit material performs well in general, under certain conditions the fabric lining as well as the foam absorb some oil and that this absorbed oil cannot be removed easily either by physical expression or by cleaning with commonly available detergents. The absorbed oil leads to some increases in density and in thermal conductivity, with the latter change for the 'Worst case' being about 35%. |
author2 |
T S ASSOCIATES INC COLUMBIA MD |
format |
Text |
author |
Sinnarwalla, Abbas M. Sundaram, T. R. |
author_facet |
Sinnarwalla, Abbas M. Sundaram, T. R. |
author_sort |
Sinnarwalla, Abbas M. |
title |
Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures |
title_short |
Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures |
title_full |
Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures |
title_fullStr |
Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures |
title_full_unstemmed |
Laboratory Assessment of the Changes in Thermal Properties of Polar Diving Suit Material When Exposed to Oils at Low Temperatures |
title_sort |
laboratory assessment of the changes in thermal properties of polar diving suit material when exposed to oils at low temperatures |
publishDate |
1981 |
url |
http://www.dtic.mil/docs/citations/ADA121827 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA121827 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Subarctic |
genre_facet |
Arctic Subarctic |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA121827 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766341564128296960 |