Water-resistant wound paperboard tube
US7842362B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2006 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Oct 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/28
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A wound paperboard tube having enhanced burst strength in high-moisture conditions up to and including complete and prolonged submersion in liquid water comprises a plurality of paperboard plies formed from a pulp comprising papermaking furnish and an effective amount of a size such that the paperboard plies have reduced moisture add-on when submerged in water, relative to paperboard plies formed from a pulp comprising the identical furnish but without the size. The plies are wound one upon another about an axis of the tube and adhered together with a water-resistant adhesive comprising a polyvinyl composition containing a cross-linking agent for inducing cross-linking of the adhesive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.