Method of Obtaining Fireproof Polyacrylonitrile Fiber or Fabric Made from It,

Abstract

A method is known for obtaining fireproof polyacrylonitrile fiber by means of heating up to 200 C, however, the fiber which is obtained has low strength characteristics. A method is being proposed for obtaining fireproof polyacrylonitrile fiber or fabric made out of it. In this method the polyacrylonitrile fiber is subjected to gradual heat treatment, being heated initially at 200 C for 25-30 h. Then the temperature is raised to 300 C at a rate of 1.5-2.0 per minute. After a temperature of 300 C is reached the temperature is raised to 400-475 in the course of 15-25 min. In this case of a fireproof material with satisfactory mechanical properties is obtained. The processed polyacrylonitrile fabric does not catch fire in the flame of a burner and has the following strength characteristics: weight of 1 sq meter - 200 g; strength on base 38-45 rkm abbreviation not verified, on the weft - 30-35 rkm; elongation on base and on the weft - 4-5%. (Russian Translations).

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Document Details

Document Type
Technical Report
Publication Date
Feb 19, 1987
Accession Number
ADA177794

Entities

People

  • A. A. Konkin
  • R. M. Kosova
  • V. Ye. Kotina

Organizations

  • National Air and Space Intelligence Center

Tags

DTIC Thesaurus Topics

  • Acrylonitrile Polymers
  • Elongation
  • Fire Resistant Materials
  • Foreign Technology
  • Graphics
  • Heat Treatment
  • Heating
  • Materials
  • Mechanical Properties
  • Patents
  • Standards
  • Thermal Stability
  • Translations

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Electrochemical Engineering/ Fuel Cell Technologies
  • Thermal Physics or Thermal Science.