Accession Number : AD0820940

Title :   COMPATIBILITY OF MATERIALS FOR AMMONIA REGULATOR LIP SEALS,

Corporate Author : NORTH AMERICAN AVIATION INC LOS ANGELES CALIF

Personal Author(s) : Geib,E.

Report Date : 05 JUL 1961

Pagination or Media Count : 3

Abstract : On the basis of inertness to ammonia, the materials tested fall into the following sequence (most inert at top of list): (1) FEP Teflon (Polyfluorinated ethylene propylene); (2) KEL-F (Polytrifluorochloro-ethylene); (3) Tedlar (Polyvinyl Fluoride); and (4) Vac-Pak (Polyamide). Mylar is completely unsatisfactory. Complete disintegration of samples occurred in 30 days in anhydrous ammonia. Initial failure was observed after 14 days.

Descriptors :   (*PLASTIC SEALS, COMPATIBILITY), HALOCARBON PLASTICS, AMMONIA, DEGRADATION, PHYSICAL PROPERTIES, AMMONIUM COMPOUNDS, FAILURE(MECHANICS), VISUAL INSPECTION, TENSILE PROPERTIES, PRESSURE REGULATORS, PRESSURIZATION

Subject Categories : Adhesives, Seals and Binders

Distribution Statement : APPROVED FOR PUBLIC RELEASE