Pipe wrap for preventing microbiologically influenced corrosion in buried conduits
US6488998B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 2000 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
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 thro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.