Nomex Ultraviolet Inhibitors.
Technical Report,01 Apr 1970,30 Sep 1972
GILLETTE CO RESEARCH INST ROCKVILLE MD ROCKVILLE
Pagination or Media Count:
Investigation has been made of several systems intended to improve the resistance of Nomex fabric and webbing to actinic degradation. All of these consisted in applying to the Nomex a material that absorbs actinic radiation in the range 360 - 390 nm, which is known to be the wavelength involved in the photochemical degradation. Several materials are available that meet this primary requirement, but relatively few meet the added requirements of stability, safety in application and use, and lack of undesirable effects on the fabric. A major problem proved to be the durable and satisfactory bonding of the protective material to the Nomex. Best results were obtained by applying a pigment that was opaque to the harmful radiation carbon- black in a lacquer type polymeric tie- coat or binder. A vinyl resin was used as the major ingredient of the tie-coat. A COMPLETE SURVEY OF THE TECHNICAL LITERATURE RELATING TO ACTINIC DEGRADATION OF POLYAMIDES IS INCLUDED AS AN APPENDIX. Author, modified-PL