BALLISTIC RESISTANCE OF NEEDLE-PUNCHED NYLON FELTS

Abstract

Felts made from high tenacity nylon 6,6 (industrial quality), bright, 6-denier filament, three-inch staple, crimpset fiber were found to be the most satisfactory in ballistic resistance, uniformity, and ease of processing among the group studied. Batts that were cross-laid proved to be superior to the parallel-laid batts and equal to a combination of straight- and cross-laid batts. The best felt, from the standpoint of both ballistic resistance and dimensional stability, was produced by needling 4-ounce batts alternately on each side, with 277 penetrations per square inch and a half-inch needle penetration, followed by flat-bed pressing (using 0.29-in spacer bars at 310F for 2-1/2 min) to attain the desired thickness. Producer's virgin waste of the same high tenacity nylon 6,6 appeared to be promising although the test results were inconclusive.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1966
Accession Number
AD0633881

Entities

People

  • Richard C. Keith

Tags

Communities of Interest

  • Air Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Absorption
  • Abstracts
  • Acceptance Tests
  • Body Armor
  • Construction
  • Contractors
  • Contracts
  • Elongation
  • Manufacturing
  • Materials
  • Organic Materials
  • Resistance
  • Standards
  • Static Tests
  • Test And Evaluation
  • Test Methods
  • Thickness

Fields of Study

  • Materials science

Readers

  • Mathematics or Statistics
  • Polymer Science and Engineering.
  • Reinforced Composite Materials