| 摘要 |
An improved anti-corrosive material used to protect buried conduits from corrosion. The anti-corrosive material is comprised of a conduit contacting layer of polyolefin having the anti-corrosive agents impregnated therein. The preferred embodiment of the material is a multi-layered co-extruded, calendered, or laminated polyolefin. The material has an outer layer, or environment contacting layer, preferably comprised of a low density polyethylene having characteristically strong tensile strength and elongation properties to provide conventional protection from soil, water, air, or other potentially damaging elements. The material has a center layer preferably comprised of a high density polyethylene having superior tensile strength to provide a high density barrier between the outer layer and an inner layer. The inner layer, or conduit contacting layer, is preferably comprised of a low density polyethylene impregnated with one or more antimicrobial additives. The antimicrobial additives are incorporated into and dispersed throughout the conduit contacting layer for killing corrosion-inducing bacteria on the surface of the conduit. The antimicrobial additives are able to migrate through the low density polymer matrix but the rate of migration of the biocide is considerably slowed through the high density polymer. Thus, the antimicrobial agents are substantially prevented from escaping into the surrounding environment, but rather, are trapped within a "protection zone" immediately adjacent the conduit surface to provide extended protection against corrosion.
|
