US 12,220,858 B2
Abrasive sheet including a plurality of protrusions
Paul D. Graham, Woodbury, MN (US); Douglas A. Davis, Cottage Grove, MN (US); Thomas E. Pahl, Cottage Grove, MN (US); John G. Petersen, Center City, MN (US); Graham M. Clarke, Woodbury, MN (US); James J. Kobe, Newport, MN (US); Thomas B. Galush, Roseville, MN (US); Charles R. Wald, Oakdale, MN (US); and Brian W. Lueck, Houlton, WI (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Dec. 17, 2021, as Appl. No. 17/555,242.
Application 17/555,242 is a division of application No. 16/611,340, abandoned, previously published as PCT/US2018/031039, filed on May 4, 2018.
Claims priority of provisional application 62/503,469, filed on May 9, 2017.
Prior Publication US 2022/0105605 A1, Apr. 7, 2022
Int. Cl. B29C 59/04 (2006.01); B24D 11/00 (2006.01); B24D 11/02 (2006.01); B32B 3/18 (2006.01); B32B 27/08 (2006.01); B32B 27/00 (2006.01); B32B 27/30 (2006.01); B32B 27/40 (2006.01)
CPC B29C 59/046 (2013.01) [B24D 11/005 (2013.01); B24D 11/02 (2013.01); B32B 3/18 (2013.01); B32B 27/08 (2013.01); B24D 11/001 (2013.01); B29C 2948/00 (2019.02); B32B 27/00 (2013.01); B32B 27/302 (2013.01); B32B 27/40 (2013.01); B32B 2307/536 (2013.01); B32B 2307/538 (2013.01); Y10T 428/1352 (2015.01)] 21 Claims
OG exemplary drawing
 
1. A method of making an abrasive sheet comprising:
forming a first assembly, the first assembly comprising:
a support having a plurality of holes defined on a support major surface, wherein the support is a support film that has an extrusion surface and a back surface, and the holes penetrate from the extrusion surface to the back surface; and
a first polymer component at least partially filling at least one of the holes of the support and forming a layer thereon; and
coating the first polymer component with an abrasive material.