High bulk paper of great stiffness
US4124439A · kind A · utility
20Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1974 |
| Grant date | Nov 7, 1978 |
| Priority date | — |
| Expiry date | Jun 21, 1994 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/49
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper having adequate mechanical strength and stiffness for use in xerographic equipment at a very low weight is prepared from a stock containing untreated cellulose fibers as well as cellulose fibers stiffened by impregnation with melamine-formaldehyde precondensate or methylolurea, curing of the initially water-soluble resin, and reaction of the cured resin with polyvinyl alcohol or starch ether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.