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US 10,675,794 B2Granted
Coated abrasive article with foam backing and method of making
Assignee3M Innovative Properties Company
InventorsJoseph B. Eckel, Steven J. Keipert, Ehrich J. Braunschweig
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Abstract
A polyurethane foam backing suitable for making a coated abrasive article is disclosed. The polyurethane foam backing has a textured surface bearing an array of raised features and land areas. The array's geometry is designed such that a 90 degree peel force to remove a production tooling having a contacting surface bearing a plurality of microreplicated mold cavities from the textured surface is accept able.
Claims20
A coated abrasive article comprising:
- a polyurethane foam backing comprising a continuous and integral textured foam surface on one side of the foam backing and an abrasive layer comprising a make coat and abrasive particles on an opposing side surface of the backing, the continuous textured foam surface comprising an array of raised features and land areas, the continuous textured foam surface having a total surface area (in2) per 1 in2 of greater than 1.000 and equal to or less than 1.400, and wherein the polyurethane foam backing has uniform porosity density in which the porosity density throughout the entire foam backing including the integral textured foam surface does not vary by more than 25%.
An abrasive article comprising:
- a polyurethane foam backing comprising a continuous and integral textured foam surface comprising an array of raised features and land a reason one side of foam backing and an abrasive layer on an opposing side surface of said backing, wherein during production of the backing, a 90 degree peel force required to remove the continuous textured foam surface from a production tooling comprising a plurality of microreplicated mold cavities in a contacting surface is less than 4.5 Newton/inch (1.7 N/cm), and wherein the polyurethane foam backing has uniform porosity density in which the porosity density throughout the entire foam backing including the integral textured foam surface does not vary by more than 25%.
A coated abrasive article comprising:
- a polyurethane foam backing comprising a continuous and integral textured foam surface on one side of the foam backing, the continuous textured foam surface comprising an array of raised features and land areas and wherein the polyurethane foam backing has uniform porosity density;
- and an abrasive layer comprising a make coat and abrasive particles on an opposing side surface of the backing;
- the make coat comprising a urethane having a hardness from 55 to 80 Shore D;
- and a size coat is applied over the abrasive layer, the size coat comprising an acrylic having a glass transition temperature from 54 to 100 degrees C. wherein the polyurethane foam backing has uniform porosity density in which the porosity density throughout the entire foam backing including the integral textured foam surface does not vary by more than 25%.
1 more element
Dependencies are inferred from the claim text.