Sanitary napkin
US6673985B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jun 27, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F13/5323
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is a sanitary napkin having a longitudinal rear portion. The sanitary napkin includes: a main absorbent region having a main absorbent core between a back sheet and a surface sheet; side regions on both sides of the main absorbent region; and boundary regions having leakage-preventing side walls and positioned between the main absorbent region and the side regions. In the rear portion, the main absorbent region has a stiff portion, and the side regions are protruded laterally to form rear flaps each having an auxiliary absorbent core between the back sheet and another sheet. In the rear portion, a portion of the main absorbent region having the stiff portion therein, the boundary region and the rear flap have different longitudinal stiffnesses according to the following relationship: the portion having the stiff portion therein>the boundary region>the rear flap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.