Blackhead-removing face pack sheet
US6190683A · kind A · utility
4Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1997 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Aug 28, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/0208
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A blackhead-removing face pack sheet with superior ease of use and blackhead-removing capacity is provided. The blackhead-removing face pack sheet 1 is formed from a laminate which comprises a gas-permeable and flexible base layer 2 and a pack material layer 3 the primary component of which is a copolymer of vinyl acetate and N-vinyl-2-pyrrolidone. The base layer 2 comprises a porous material such as a nonwoven fabric, and part of it is impregnated or embedded with the pack material constituting the pack material layer 3. This gives a high force of adhesion between the base layer 2 and the pack material layer 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.