Colored sanitary tissue paper and production method thereof
US7578903B2 · kind B2 · utility
0Cited by
13References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2004 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Oct 8, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24479
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention is directed to obtain a colored sanitary tissue paper giving a bright feeling in spite of modest color. The invention provides a colored sanitary tissue paper with a color difference between before and after dyeing of 15 or more in D value of Hunter's color difference formula defined in JIS Z 8730; D=(ΔL2+Δa2+Δb2)1/2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.