High bulk paper
US6254725A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1997 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Jun 20, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/84
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are disclosed for making a high bulk, coated paper of a unique structure with the coating forming a lower portion of the total caliper and the paper base forming a higher portion of the total caliper than conventionally made coated paper of the same weight. The process includes the step of using furnish with a high percentage of mechanical pulp, applying that furnish to papermachine wires, preferably with a gap former, coating the paper with a coating containing a plastic pigment, preferably of 4 or more parts per 100 parts of coating pigment, and calendering the coated paper at a nip loading less than conventional supercalendering nip loading. Preferably, the finished coated paper will have a 75.degree. TAPPI gloss of 40 or above. The method and apparatus can be used to make lightweight or other weights of coated paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.