Our patented BlastWrap® material has been designed to mitigate blasts and suppress flash fires resulting from explosions, regardless of the material or compound causing the explosion. We believe that this technology can be used to create new finished products or designed to retrofit existing products.
Mitigation or attenuation of blast effects is the dissipation of blast energy so that acoustic and shock waves, peak overpressure, reflected peak overpressure, impulse and afterburn (the rapid burning of combustible materials in the “hot zone”, including soot, occurring so fast that it adds to blast effect from the original explosive) are reduced. This reduction is accomplished through both physical and chemical processes that are triggered when a blast occurs. The remaining energy is transmitted at a slower, more sustainable level. The amount of reflected energy is significantly reduced with mitigation. Unlike hardening systems, the performance of our products is not related directly to material thickness and therefore we believe our products have a greater range of uses producing the same or better effectiveness against blast effects.
Our BlastGard® technology is designed to mitigate blast and rapid combustion phenomena through numerous mechanisms. The relative contribution of each mechanism depends upon the intensity and nature of the impinging hazard. Shock wave attenuation, for example, is dominant in mitigating mechanical explosions. Our products attempt to emulate unconfined conditions and accelerate attenuating processes that occur in free air. Thus BlastWrap® does not try to resist blasts (which physically intensify blast phenomena); it mitigates them. BlastWrap® can be used as part of confining assemblies (containers and blast walls). In effect, BlastWrap® is a ‘virtual vent’.
Our BlastWrap® products are made from two flexible films arranged one over the other and joined by a plurality of seams filled with attenuating filler material (volcanic glass bead or other suitable two-phase materials), configurable (designed for each application) with an extinguishing coating. Together, this combination of materials is designed to mitigate a blast while at the same time eliminate fireballs or flame fronts produced by the blast.
Blastwrap® works 24-hours a day, quenches fireballs and post blast fires, reduces blast impulse and pressure, does not dispense chemical extinguishants, uses neither alarms, sensors, nor an activation system, and is nontoxic and ecologically friendly.
Our BlastGard® Technology extracts heat, decelerates both blast wind and shock waves, and quenches the hot gases in all blasts and fireballs. BlastWrap® does not interact with the explosive elements, and is therefore not altered by them. However, after a single intense detonation, BlastWrap® must be replaced.
The performance of BlastWrap® proprietary technology is independent of scenario and environment, which means that it does not matter where the physical location is, how the basic product form is used or the environment in which the event takes place. The basic product form can be used as a stand-alone material (as linings, curtain barriers, or as structural material), or can be laminated or otherwise affixed to a wide range of product forms such as insulation (thermal and acoustic), ballistic armor, or packaging materials. BlastWrap® products can thus provide blast and fire protection in flooring, wall, and roof constructions, in packaging, in storage cabinets and other containment structures, and aboard all types of vehicles, ships, and aircraft.
An explosion results from the rapid conversion of chemical energy into rapidly expanding high-pressure gases. The rapidly expanding gases compress the surrounding air much like a piston and create a shock wave that travels ahead of the explosive gases. The “overpressure” (pressure above ambient) in a shock wave acts to “pre-condition” the air as it passes through to make the following accelerated gas “piston” more damaging. This high intensity, short duration overpressure wave transfers impulse (momentum) which stresses, damages or destroys structures in its path. Impulse follows the shock wave but lingers and decays with time. The negative phase is a partial vacuum that “whips” lighter structures to magnify damage. A shock wave can be likened to an initial hard punch, while the impulse is more like a powerful bulldozer. Any reduction in the effective power of the shock wave will increase the target’s capability to withstand the destructive impulse.
BlastWrap is scientifically engineered and designed to remove much or most of the energy from an explosion. It actually interferes with the blast energy process. There are two primary components of any explosion – mechanical effects (which are shock impulse and acoustic waves) and chemical/thermal effects (fireball). In fact, shock impulse is the real killer in a high explosive blast. BlastWrap dissipates blast shock wave energy through irreversible processes, such as drag, turbulence, friction, viscosity, reflection, etc.; and at the same time, BlastWrap dramatically quenches the flame fronts or fireballs created as a result of the explosion in milliseconds. This is important because a fireball (which represents the rapid gas expansion by the burning of materials) creates enormous pressures, commonly called “the blast wind.” As a result of that, BlastWrap also kills the phenomena of afterburn which can initiate post-blast fires.