Accelerated degradation evaluation method and apparatus
US6772536B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2002 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Jun 28, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B5/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and method are provided for measuring the physical strength and ability of a solid sample, to resist breakdown into fines after repeated cycles of hydration and regeneration of temperatures in excess of 100° C. The test samples are evaluated using an accelerated degradation apparatus that subjects the sample to a predetermined number of timed cycles of wetting/drying under heat and vacuum, and the weight-percent of any fines produced by the degradation of the sample are measured and recorded after a prescribed number of cycles. Specific values are used for predicting potential useful service life, in years of samples from different commercial manufacturers of the same class of product; the resulting data can be used by manufacturers for more effective quality control of production batches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.