Process for preparing base paper for fine paper
US6406592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1998 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Sep 16, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/72
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention concerns a method for producing a base paper for fine papers, the base paper being produced from a mixture of a mechanical pulp and a chemical pulp. The chemical pulp used comprises a chemical softwood pulp having a elastic modulus close to that of the mechanical pulp and a great bonding strength. It is preferred to use a chemical softwood pulp which produces a sheet having a elastic modulus of less than 6000 N/mm2 when the bonding strength is 400 J/m2. A pulp of this kind has a good ScottBond strength at the same light scattering. The base paper produced by the method can therefore be used in double-coated fine papers which require a large bonding strength of the base paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.