Double layer Mylar films reinforced with Dacron fiber have exhibited promising properties for use in parachute canopies. These properties include:nTensile Strength 82-90 pounds Burst Strength 195 - 220 poundsnWeight Per Square Yard 2.44 - 4.42 ounces Thickness (maximum) 0.007 - 0.008 inchesnNo embrittlement at -60℃. and retention of useful properties at 150℃.nThese films were prepared by cementing a reinforcing grid of 2, 3 or 4 ply Dacron thread between two 50 or 100 gauge Mylar films.nMiniature parachutes made of Reinforced Mylar Films bad exceptional resistance to tearing, to failure by flexing or creasing, and to abrasion. Accelerated rapid-load tests of these parachutes did not produce any failure in the seams or material. Reinforced Mylar Film thus compared favorably with Nylon except for its weight and porosity which could probably be improved by further investigation.
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