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Testing of Adhesives and Polycarbonate Lenses in a Simulated Mine Environment. Part 4, Final Technical Report.


PB86209533

Publication Date 1985
Personal Author Parr, C. H.; Weed, D. N.; Cox, P. A.
Page Count 69
Abstract A testing program was conducted to determine the suitability and reliability of adhesives and polycarbonate (PC) lenses for extended use in luminaires in mine environments. Polycarbonates were exposed, for periods up to 36 months, to four environments including ultraviolet light, humidity, intermittent water spray, and heat of either 180 degree F or 240 degree F in various combinations. Izod impact tests on the exposed lens material indicated that polycarbonate functions well under all 180 degree F environments and could be used with confidence for periods exceeding the test period, for as long as 10 years, with a suitable safety factor employed in design. The specimens exposed at 240 degree F showed decreased toughness after 24 months' exposure. Extrapolation of these data was deemed to be risky. A 462-day compatibility test between polycarbonate and six hydraulic fluids was run on stressed PC beams. One fluid caused beam breakage in less than 1 day, while three caused breakage at intermediate times. Two fluids exhibited essentially no effect on the PC when compared with a control.
Keywords
  • Mine lighting
  • Mining research
  • Mining engineering
  • Luminaires
  • Plastic lenses
  • Adhesives
  • Sealers
  • Reliability
  • Polycarbonate resins
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 48A - Mineral Industries
  • 94E - Environmental Engineering
Corporate Authors Southwest Research Inst., San Antonio, TX. Dept. of Bioengineering.; Bureau of Mines, Washington, DC.
Supplemental Notes Sponsored by Bureau of Mines, Washington, DC.
Document Type Technical Report
Title Note Open file rept. Sep 81-Feb 85.
NTIS Issue Number 198618
Contract Number
  • H0387009
Testing of Adhesives and Polycarbonate Lenses in a Simulated Mine Environment. Part 4, Final Technical Report.
Testing of Adhesives and Polycarbonate Lenses in a Simulated Mine Environment. Part 4, Final Technical Report.
PB86209533

  • Mine lighting
  • Mining research
  • Mining engineering
  • Luminaires
  • Plastic lenses
  • Adhesives
  • Sealers
  • Reliability
  • Polycarbonate resins
  • Bureau of Mines
  • 48A - Mineral Industries
  • 94E - Environmental Engineering
  • H0387009
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