Perforated films having channels with cutout portions capable of spontaneous fluid inversion
US5648142A · kind A · utility
108Cited by
13References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Oct 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24802
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polymeric film for use in absorbent structures comprises a planar surface having a frontside, a backside and a plurality of apertures. Walls extend from the perimeter of the apertures and outwardly from the backside. The walls and the backside form a capillary system on the backside. The walls form channels which connect the frontside of the film to the capillary system on the backside. The walls have at least one cut out portion extending the length of the walls. A fluid contacting the frontside of the film will spontaneously invert to the capillary system on the backside of the film through the cut out portions of the walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.