US 11,806,838 B2
Floor pad with variable abrasive distribution
Lijun Zu, Woodbury, MN (US); Andrew C. Anderson, Hudson, WI (US); Sarah L. Hagen, Inver Grove Heights, MN (US); Jesse D. Lund, Saint Paul, MN (US); Qihong Nie, Woodbury, MN (US); David C. Raithel, Hudson, WI (US); and Kim C. Sachs, Jr., Woodbury, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/635,332
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jul. 9, 2018, PCT No. PCT/IB2018/055037
§ 371(c)(1), (2) Date Jan. 30, 2020,
PCT Pub. No. WO2019/025883, PCT Pub. Date Feb. 7, 2019.
Claims priority of provisional application 62/539,120, filed on Jul. 31, 2017.
Prior Publication US 2020/0156216 A1, May 21, 2020
Int. Cl. B24D 11/04 (2006.01); B24D 11/06 (2006.01); B24D 3/28 (2006.01)
CPC B24D 11/04 (2013.01) [B24D 11/06 (2013.01); B24D 3/28 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A surface-treating article, comprising:
a circular substrate comprising a web of open, lofty, nonwoven fibers, the substrate comprising a first major surface; and
a coating including an abrasive and a resin disposed on the first major surface;
wherein the abrasive having a first concentration at a first radius measured from the center of the substrate,
wherein the abrasive having a second concentration not equal to the first concentration at a second radius measured from the center of the substrate, wherein the first radius and the second radius are different lengths and the length of the first radius is less than the length of the second radius,
wherein the first concentration and the second concentration are greater than zero,
wherein the abrasive has a third concentration at a third radius measured from the center of the substrate, and wherein the first and third concentration are both greater than the second concentration, and the length of the second radius is between the length of the first radius and the third radius.