Process for producing a paperboard product for premium packaging applications
US4957578A · kind A · utility
8Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Mar 22, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is disclosed for preparing a high quality paperboard product with high brightness and a defect-free glossy surface. The product comprises a structure consisting essentially of a paperboard substrate onto one surface of which there is first applied a coating of a pigmented polyolefin and a subsequent coating of a clear polymeric material such as a polyester. The brightness and loss achieved for the paperboard product is superior to conventional coated paperboard, cast coated paperboard, or other laminated paperboards currently in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.