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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

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