Research On Fog-Resistant Materials For High-Altitude Helmet Visors

Item

Title
Research On Fog-Resistant Materials For High-Altitude Helmet Visors
Date
1962
Index Abstract
Not Available
Photo Quality
Complete
Report Number
AMRL TDR 62-141
Creator
Gutfreund, Kurt
Corporate Author
Armour Research Foundation
Laboratory
Life Support Systems Laboratory
Extent
48
Identifier
AD0295847
AD0295847
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-8076
DoD Project
6301
DoD Task
630104
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Cover Price
1.25
Abstract
Various methods of preventing visibility losses due to fogging of plastic MA-3 and HGU-8/P helmet visors in pressure suits were investigated. Hygrophilic film-forming polymers with polyhydroxyl groups were found to be promising fog-resistant coatings. Their effectiveness depends largely on the relative surface concentration of hygrophilic and hygrophobic groups, since these groups determine the proper balance between wettability and stability of the treatment on prolonged and intermittent exposure to fog-promoting conditions. Visors treated with 83 to 87% hydrolyzed polyvinyl acetate showed good overall optical properties. The exhibited little distortion, and their luminous transmittance and haze values were 92 and 0.4%, respectively. Enhancing the wettability of acrylic surfaces by ultraviolet irradiation and exposure in a thermal column of a nuclear reactor was ineffective. Also, preferential condensation of moisture in the helmet by gas-phase nucleation proved unsatisfactory for inhibiting fogging.
Corporate Report Number
ARF 3195-6, Final Technical Documentary Report
Report Availability
Full text available
Date Issued
1962-12
AD Number
AD-295 847
Index In
U.S. Government Research Reports, Vol. 38, No. 9, p. 45
Index Price
$1.25
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Item sets
Illinois Tech Related
Media
AMRLTDR62-141.pdf

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