Accession Number : ADA319416

Title :   Correlation of Simulated Rainfall Tests with Laboratory Penetration Tests,

Corporate Author : QUARTERMASTER CORPS WASHINGTON DC

Personal Author(s) : Landsberg, M. I. ; Kelly, Roger ; Sinski, Dorothy

PDF Url : ADA319416

Report Date : SEP 1949

Pagination or Media Count : 25

Abstract : A correlation has been established between the results of rain-room tests on garments and swatches and the results of the following laboratory tests: drop-penetration, du Pont rain test, Bundesmann, aid hydrostatic pressure. Two series of fabrics were used for this study. The first (Series II) included seven commercial and military type materials whose resistance to penetration varied from very poor to very good. The second (Series 2) consisted of 25 experimental materials of excellent water resistance which had been produced with controlled variations in constructional factors such as yarn twist, size, and ply; texture and weight. Based on the analyses which have been performed it has been shown that the drop-penetration test is most suitable for predicting rain performance of a wide range of fabrics. The du Pont rain test, although not as widely applicable as the drop penetration test, is most suitable for estimating the rain performance of either single- or double-layer fabrics possessing the water-resistance characteristics desired by manufacturers producing civilian-type rain coats. The Bundesmann test appears to be almost as satisfactory as the rain tester, but its limited use and range preclude its general acceptance. The hydrostatic-pressure test is not as suitable for predicting the rain performance of a wide range of fabrics because of its relative insensitivity to those characteristics which influence rain protection, such as thickness and density.

Descriptors :   *FABRICS, TEST AND EVALUATION, LABORATORY TESTS, PENETRATION, RAINFALL, CLOTHING, YARNS, WATERPROOFING, HYDROSTATIC PRESSURE.

Subject Categories : Textiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE