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.
Claims16
A coated abrasive article comprising:
- a polyurethane foam backing having at least one textured surface and an abrasive layer comprising a make coat and abrasive particles on an opposing surface, the textured surface bearing an array of raised features and land areas, the textured surface having a Total Surface Area (in2) per 1 in2 equal to or less than 1.400, and wherein the polyurethane foam backing has substantially uniform density.
A polyurethane foam backing comprising a textured surface bearing an array of raised features and land areas, an opposing surface opposite the textured surface, and wherein a 90 degree peel force to removed the textured 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).
A coated abrasive article comprising:
- a polyurethane foam backing having at least one textured surface, the textured surface bearing an array of raised features and land areas and wherein the polyurethane foam backing has substantially uniform density;
- and an abrasive layer comprising a make coat and abrasive particles on an opposing 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, Tg, from 54 to 100 degrees C.
Dependencies are inferred from the claim text.