Cordtex is a type of detonating cord generally used in mining.
"Cordtex" and "Primacord" are two of many trademarks which have slipped into use as a generic term for detonating cord.
[1] It uses an explosive core of pentaerythritol tetranitrate (PETN) inside its plastic coating.
It is commonly the thickness of electrical extension cord and has a detonation velocity of approximately 6000–7000 metres per second.
[2] It can also be used in short lengths in simple boobytraps and early warning devices.