DEVELOPMENT, SELECTION, TESTING OF BASIC MATERIALS AND FABRICATION OF THERMAL RADIATION PROTECTIVE ASSEMBLIES
Abstract
Samples of woven glass fabrics were examined with respect to sewing characteristics, seam strength, drape characteristics and general handling characteristics. The tendency to fray is eliminated by the application of a cement to the appropriate area before actually cutting the materail. An increase in seam strength is obtained by using a special high speed needle and a low number of stitches per inch. Stitches such as the zig-zag with varied dimensions and the double zig-zag have proven somewhat successful. The fold-over and french seam have also exhibited good strength characteristics. A sample of a plain woven glass cloth, 4.0 mils thick, with a zig-zag stitch and fold-over seam, was tested in a bag 30 in. long and 12 in. in diameter. The bag was pressurized to 4.8 psig before failure of the seams. A glass-nylon combination cloth was tested in the same bag with a plain seam and a zig-zag stitch. The seam withstood 10 psig for 20 min. without deleterious effects.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 08, 1961
- Accession Number
- AD0265652
Entities
People
- W. J. Berus