Indicator material
US5891811A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is concerned with an indicator material which is obtained by impregnating a non-woven fabric, of which one surface is provided with a resin layer having a partly or wholly colored surface, with a volatile oily substance used as an active ingredient in a deodorant, an aromatic agent, an anti-fungal agent or a mothproofing agent, and which is used for showing the degree of dissipation of the oily substance which occurs with the passage of time, based on the shifting of the resin layer observable from the non-woven fabric side from a visible state to a state masked by the non-woven fabric, the indicator material overcoming a failure of conventional indicator materials containing non-woven fabrics in relatively clearly showing the degree of the oily substance with the passage of time, by using a non-woven fabric containing a fine-denier fiber having a size of 2 denier or less or by using a non-woven fabric having a partly altered density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.