Bulky paper with concavo-convex pattern and process for producing thereof
US8449718B2 · kind B2 · utility
4Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2009 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | May 31, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/54
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a bulky paper with a concavo-convex pattern includes the steps of producing a wet mixed sheet comprising high-basis-weight regions and low-basis-weight regions from a paper-making material prepared by dispersing a fiber starting material and heat-expanding particles in water, the heat-expanding particles being evenly dispersed in the fiber in the high basis-weight and low basis-weight regions; and then heating the wet mixed sheet to cause expansion of the heat-expanding particles and form a concavo-convex pattern. This allows the free designing of concavo-convex sections on bulky papers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.