Recommendations for the Military Specification:Plastic Film,Polyethylene for Balloon Use.

摘要

A program to establish testing methods for use in military specifications for polyethylene balloon film is reported. Previously determined methods are reviewed along with early versions of the military specification. The presently reported program, resulting from problems discovered during a trial use of a tentative version of the Military Specification: Plastic Film, Polyethylene for Balloon Use, is devoted to (1) the specification of grips for uniaxial testing, (2) uniaxial sample preparation, (3) ultimate property determinations in uniaxial testing, (4) crease and seal testing, (5) resin characterization for assurance of consistency between batches and (6) cold brittleness determination. Recommendations for changes are made in each of these categories.