A STUDY OF THE EFFECTS OF CHEMICALS ON THE PROPERTIES OF PARACHUTE FABRICS
NORTH CAROLINA STATE UNIV AT RALEIGH SCHOOL OF TEXTILES
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During routine inspection of parachutes, several badly degraded nylon parachutes were discovered. Preliminary evaluation by chemical analysis indicated the presence of mineral acids. To provide backgrouid data,nylon and Dacron fabrics were exposed to sulfuric, hydrochloric, nitric, phosphoric, sulfurous, hydrosulfuric, and nitrous acids. The exposures were conducted under various concentrations for periods of time up to six months. The evaluation was conducted by establisiing the breaking strength of the exposed fabrics and conaring them to the original breaking strength. Additional phases of the work consisted of studying the effect of light in combinaton with the acids, studying the effect of sulfur dioxide, hydrogen sulfide, and oxides of nitrogen. and examinations of procedures for detecting, by visual means, degradation by acids. Dacron was found to be quite resistant to attack by mineral acids in comparison with nylon. Acid-treated nylon was more sensitive to light than acid-treated Dacron.
- Gliders and Parachutes