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