Comparison to existing technologies
As illustrated above, silver is selectively transferred into the microorganism until a toxic accumulation occurs. The silver accumulated in the microorganism is not toxic to other neighboring cells (or skin) because it is complexed by the proteins of the dead microorganism. The silver halide reservoir within the polymeric network replenishes the surface with silver, allowing the coating to maintain high surface toxicity to microorganisms that contact it.
Silver is not released from the coating until a germ makes contact with the surface. To the best of the Company's knowledge there are no products that offer field-applied sustained disinfectant with broad-spectrum biocidal activity. There are products such as Lysol in the liquid disinfectant category, but they lack the sustained disinfection advantages of Surfacine. Likewise, there are several controlled release technologies capable of sustained disinfection, but they lack the economics and logistical advantages of being field applied like Surfacine based products.
As illustrated above, liquid disinfectants are applied to
the surface and attempt to compromise the microorganisms they
contact. If they are available in sufficient quantity they kill
the microorganism and might be available to damage another organism
(hence their potential toxicity to humans). Depending on the
type of liquid biocide, it may not kill all types of microorganisms.
Likewise, microorganisms that form biofilms (such as PSA) can
shield themselves from typical topical biocide applications and
remain adherent to the surface. After the initial application,
the biocides diffuse away or become ineffective. Thus, subsequent
microorganisms that land on the surface are not affected by the
previous cleaning application of the liquid disinfectant.
Surfacine has the following advantages compared to liquid disinfectants:
As illustrated above, these biocides are compounded during
the manufacturing process into the substrate (red spheres). They
diffuse out and if present in sufficient concentration may compromise
some of the microorganisms in their vicinity. The material slowly
exhausts its biocide reservoir and the eluted biocide concentration
slowly decays to nothing. As it begins to diminish, it becomes
ineffective. In order to replenish the system, the entire product
must be replaced.
Surfacine has the following advantages
compared to controlled biocide release surfaces: