Plural layered coated abrasive
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United States of America Patent
Stats
-
Feb 24, 1987
Grant Date -
N/A
app pub date -
Mar 12, 1986
filing date -
Mar 13, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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