Abrasive article and method for making the same
AssigneeWilshire Technologies, Inc.
InventorsFerdinand Frederick Pisacane, Eric Luo
Life of this patent
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Abstract
The present invention relates to an abrasive article. The abrasive article of the present invention contains an abrasive layer, a polyurethane structure bonded to the abrasive layer and a substrate bonded to the polyurethane structure. The present invention also involves a method for making said abrasive article.
Claims17
An abrasive article, suitable for use in a clean room comprising:
- an abrasive layer;
- a polyurethane film structure bonded to the abrasive layer;
- and
- a substrate bonded to the polyurethane film structure;
- and
- wherein the article is laundered so that when immersed in deionized water the
- article releases fewer than about 36.0.times.10.sup.6 particles of a size greater than about 0.5 .mu.m per square meter of the article and fewer than about 2.5 parts per million of chloride, fluoride, sodium, sulfate, sulfite, or silicon ions.
An abrasive article, suitable for use in a clean room, comprising:
- an abrasive layer;
- a first polyurethane film layer bonded to the abrasive layer;
- a second polyurethane film layer, which melts at a higher temperature than the first polyurethane film layer, bonded to the first polyurethane film layer;
- and
- a substrate bonded to the second polyurethane film layer, wherein the article when immersed in deionized water releases fewer than about 36.0.times.10.sup.6 particles of a size greater than about 0.5 .mu.m per square meter of the article and fewer than about 2.5 parts per million of chloride, fluoride, sodium, sulfate, sulfite, or silicon ions.
A method of producing an abrasive article suitable for use in a clean room, the method comprising the steps of:
- a) bonding a polyurethane film structure to an abrasive layer;
- b) bonding a substrate to the polyurethane film structure;
- and
- c) laundering the article, wherein the article releases fewer than about 36.0.times.10.sup.6 particles of a size greater than about 0.5 .mu.m per square meter of the article and fewer than about 2.5 parts per million of chloride, fluoride, sodium, sulfate, sulfite or silicon ions.
A method of producing an abrasive article suitable for use in a clean room, the method comprising the steps of:
- a) bonding a first polyurethane film layer to an abrasive layer;
- b) bonding a second polyurethane film layer to the first polyurethane film layer;
- and
- c) bonding a substrate to the second polyurethane film layer, wherein the article releases fewer than about 36.0.times.10.sup.6 particles of a size greater than about 0.5 .mu.m per square meter of the article and fewer than about 2.5 parts per million of chloride, fluoride, sodium, sulfate, sulfite or silicon ions.
An abrasive article, suitable for use in a clean room, comprising:
- a laundered abrasive layer;
- a polyurethane film structure bonded to the abrasive layer;
- and
- a laundered substrate bonded to the polyurethane film structure, wherein the article,
- when immersed in deionized water, releases fewer than about 36.0.times.10.sup.6 particles of a size greater than about 0.5 .mu.m per square meter of the article and fewer than about 2.5 parts per million of chloride, fluoride, sodium, sulfate, sulfite or silicon ions.
Dependencies are inferred from the claim text.