Method of coating a metallic substrate with thermoplastic coating material
US6458235B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Mar 14, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2309/66
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Method of coating a metallic substrate (1) with thermoplastic coating material, comprising a preheating the substrate in such as way that, just prior to coating, it is at a temperature between 70° C. and 150° C., preferably between 100° C. and 130° C. in the case of a coating containing polypropene and between 80 and 110° C. in the case of a coating containing polyethene; coextrusion, in the first coating station of a sheet (6) comprising a polyolefin covering layer and a modified polyolefin adhesion layer; coating of the substrate (1) with a molten sheet in the presence of ozone by pressing it with the adhesion layer against the surface of the substrate; transportation of the strip (9) coated on one side to a second coating station and heating the strip so that, just before coating, the strip is at a temperature between 70° C. and 130° C., preferably between 80° C. and 120° C., if the coating layer applied in the first coating station is polypropene and between 80 and 110° C. if the coating layer applied at that point is polyethene; coating of the substrate with a molten sheet extruded in the second coating station by pressing it against the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.