Laser barrier material
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United States of America Patent
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-
Aug 18, 1992
Issued Date -
N/A
app pub date -
Jul 30, 1991
filing date -
Sep 20, 1989
priority date (Note) -
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Abstract
In the laser drilling of a hole through a wall of a gas turbine blade into a cavity within the blade there is provided an injectable PTFE substitute for injection into the cavity before laser drilling. The PTFE substitute prevents strike-through of laser light to the opposite wall of the cavity. The PTFE substitute used is fluorinated ethylene propylene or a copolymer having a PTFE backbone and fully fluorinated alkoxy side groups.
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