Absorbent articles containing foams useful for absorbing blood and blood-based liquids
US5899893A · kind A · utility
107Cited by
88References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Oct 20, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24322
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Foams capable of absorbing blood and blood-based fluids, especially menses. These absorbent foams have high capillary absorption pressures required of absorbents used in catamenial products, yet have sufficient openness to allow free movement of the insoluble components in blood-based fluids such as menses. These absorbent foams are made by polymerizing high internal phase emulsions (HIPEs) where the volume to weight ratio of the water phase to the oil phase is in the range of from about 20:1 to about 125:1. These foams are particularly useful as absorbent members for catamenial pads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.