DETONATING FUSE
Detonating cord or fuse is a core of high explosives, normally PETN (pentaerythritol tetranitrate), enclosed in PP yarn, plastic sheathing(polyethene jacket) and natural and synthetic fibre for watreproofing. It is basically PETN in covering of textile, plastic and waterproofing material. The degree of tensile strength, abrasion resistance, and flexibility of each covering varies. It acts as a means for safe and quick initiation of detonator sensitive industrial explosives and provides a path for initiation of non electric detonators.
SAFETY
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Should be kept protected from water in a wet environment. Detonating cord doesn't initiate if its wet, since PETN absorbs water and becomes insensitive to detonation. However, it can be initiated from the dry end.
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Detonating cord are explosives, thus, should be handled and transported carefully at all times.
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It is sensitive to direct lightning strike and intense impact or friction while handling and extremely high temperatures (mostly above 70°C).
ADVANTAGES
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Relatively insensitive to detonation by heat, electrostatic discharge or other forms of electricity
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Excellent resistance to side penetration by oil or water/ Water and abrasion resistant.
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High tensile strength
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Easy to handle and to tie into knots
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Flexible
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Easy identification due to different colours.
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Electronically & mechanically inspected.
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Assures reliable non-electric initiation.
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Safer to use as compared to any other blasting cap/ less risk in handling and loading.
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Easy to connect branch lines.
Each cord is distinguished on the basis of the cord colour and the mass of core load. SBL manufactures detonating cord of core load of 10g/m of PETN.
