Plural layered coated abrasive
US4644703A · kind A · utility
83Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1986 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Mar 12, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24D11/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A coated abrasive which is advantageous for certain applications has at least two distinct layers of abrasive grits: a coarse outer layer and a finer inner layer. The median particle size of the grits in the outer layer is at least 150% of that of the inner layer grits. The grits may be adhered to the backing with adhesives compounded primarily of acrylates and cured by exposure to UV light. A product made in this way is effective for one step fining of plastic ophthalmic lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.