Accession Number:

ADA099297

Title:

The Mechanism of Strength Losses in Nylon 6,6 Parachute Materials after Salt Water Contamination,

Descriptive Note:

Corporate Author:

MATERIALS RESEARCH LABS ASCOT VALE (AUSTRALIA)

Personal Author(s):

Report Date:

1980-11-01

Pagination or Media Count:

22.0

Abstract:

Tensile strength losses in nylon 6,6 suspension lines contaminated with seawater result from abrasion damage due to salt crystals that penetrate the weave structure and cause shearing of the nylon filaments. This is contrary to a previous mechanism that attributed these losses to the increased local relative humidity and moisture uptake caused by deliquescent salts, in particular magnesium chloride MgCl2.6H2O, present in seawater. Analysis using the Rheovibron Viscoelastometer has shown that the presence of MgCl2.6H2O on nylon 6,6 material does not increase the local relative humidity but decreases it, leaving the nylon in a drier state. Author

Subject Categories:

  • Textiles
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE