Signal tube of improved oil resistance
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Dec 19, 1994
filing date -
Dec 20, 1993
priority date (Note) -
Expired
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Abstract
The invention relates to oil resistant signal tube, in particular, to initiating explosives or explosives accessories which comprise signal tube. The signal tube of the invention has a sub-tube comprising polyethylene and an outer jacket comprising a thermoplastic polyurethane resin of the polyester type.
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