From Surf Wiki (app.surf) — the open knowledge base
Primacord
Brand of detonating cord
Brand of detonating cord
Primacord is a brand of detonating cord used in blasting. It was developed in 1936 by the Ensign-Bickford Company. Ensign-Bickford sold their registered trademark for Primacord to Dyno Nobel in 2003. which manufactures it in their Graham, Kentucky factory. The name is also used as a genericized trademark for any detonating cord.
Description
Primacord consists of a continuous core of PETN, RDX or other high explosive, bound by textile yarns and finished with plastic and wax as waterproofing agents. It is produced in eight strengths:
| Name | Loading g/m (gr/ft) | Colour |
|---|---|---|
| Primacord 1 | 1.5 (7.5) | Yellow |
| Primacord 2 | 2.1 (10) | Orange |
| Primacord 3 | 3.2 (15) | Red |
| Primacord 4Y | 3.6 (18) | Yellow |
| Primacord 4R | 3.6 (18) | Red |
| Primacord 5 | 5.3 (25) | Red |
| Primacord 8 | 8.6 (40) | Red |
| Primacord 10 | 10.6 (50) | Yellow |
Primaline is a related product differing principally in having a plastic jacket instead of textile. Primaline is also available in higher loadings, up to 85 g/m (400 gr/ft):
| Name | Loading g/m (gr/ft) | Colour |
|---|---|---|
| Primaline 4D | 3.6 (18) | Orange |
| Primaline 4HS | 3.6 (18) | Clear with blue stripe |
| Primaline 5 | 5.3 (25) | Orange with wax coating |
| Primaline 5D | 5.3 (25) | Orange |
| Primaline 5NF | 5.3 (25) | Yellow |
| Primaline 8D | 8.6 (40) | Orange |
| Primaline 8HS | 8.6 (40) | Clear with black stripe |
| Primaline 10HS | 10.6 (50) | Clear with red stripe |
| Primaline 21 | 21.3 (100) | Clear |
| Primaline 32 | 31.9 (150) | Clear |
| Primaline 42 | 42.5 (200) | Clear |
| Primaline 85 | 85 (400) | Light green |
Operation
Primacord is initiated with a blasting cap or by a donor line of detonating cord or other high explosive. It detonates along its entire length at a velocity of approximately 23,000 ft per second. It is used to create explosive effects and to build reliable explosive charges. It is used in conjunction with other high explosive materials to form charges, including linear charges, capable of near instantaneous results.
References
References
- "Primacord | detonator".
- "Dyno Nobel".
- "Primacord Detonating Cord - product technical data sheet". Ensign-Bickford Aerospace and Defense Company.
This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.
Ask Mako anything about Primacord — get instant answers, deeper analysis, and related topics.
Research with MakoFree with your Surf account
Create a free account to save articles, ask Mako questions, and organize your research.
Sign up freeThis content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.
Report