US2021308834A1PendingUtilityA1

Self-contained buffing articles

Assignee: 3M INNOVATIVE PROPERTIES COPriority: Jul 30, 2018Filed: Jul 18, 2019Published: Oct 7, 2021
Est. expiryJul 30, 2038(~12 yrs left)· nominal 20-yr term from priority
B24D 11/001B24D 18/0045B24D 18/0009B24D 18/0027B24D 18/0072B24D 3/20B24D 13/16
49
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Claims

Abstract

Abrasive articles comprising at least one layer of fibrous nonwoven fabric, woven fabrics and combinations thereof are disclosed. The fabrics or combinations of fabrics may have a hardened adherent coating. The adherent coating may comprise a first coating and a second coating. The second coating may be formed on top of the first coating. The first coating may comprise a crosslinked binder and the second coating may comprise an abrasive particle and a lubricant.

Claims

exact text as granted — not AI-modified
1 . A unitized abrasive wheel comprising;
 at least one layer of fibrous nonwoven fabric; the nonwoven fabric having a hardened adherent coating comprising a first coating and a second coating, the second coating formed on top of the first coating;   wherein the first coating comprises a crosslinked binder; and   wherein the second coating comprises an abrasive particle and a lubricant, wherein the abrasive particle is less than about 15 μ.   
     
     
         2 . (canceled) 
     
     
         3 . The unitized abrasive wheel of  claim 1 , wherein the nonwoven fabric comprises a combination of a synthetic fiber and a natural fiber. 
     
     
         4 . The unitized wheel of  claim 3 , where in the synthetic fiber comprises nylon and the natural fiber comprises cellulose. 
     
     
         5 - 7 . (canceled) 
     
     
         8 . The unitized wheel of  claim 10 , wherein the crosslinked binder comprises a polyurethane and an amine. 
     
     
         12 . (canceled) 
     
     
         9 . The unitized wheel of  claim 1 , wherein less than all of the abrasive particles are fixed to the nonwoven web. 
     
     
         10 . The unitized wheel of  claim 1 , wherein substantially all of the abrasive particles are fixed to the nonwoven web. 
     
     
         15 - 18 . (canceled) 
     
     
         11 . A method of making a unitized abrasive wheel comprising the steps of:
 providing a nonwoven fabric;   coating the nonwoven fabric with a first coating, the first coating comprising a precursor crosslinker;   hardening the first coating to form an adherent coated web;   compressing the adherent coated web to form a compressed adherent coated web; and   coating at least one outside surface of the adherent coated web with a second coating, the second coating comprising a lubricant and an abrasive particle, wherein the abrasive particle is less than about 15 μ.   
     
     
         12 . (canceled) 
     
     
         13 . (canceled) 
     
     
         14 . The method of  claim 19 , wherein the nonwoven fabric comprises a combination of a synthetic fiber and a natural fiber. 
     
     
         15 . (canceled) 
     
     
         16 . (canceled) 
     
     
         26 - 28 . (canceled) 
     
     
         19 . The method of  claim 19 , wherein substantially all of the abrasive particles are fixed to the nonwoven web. 
     
     
         20 . The method of  claim 19 , wherein the first coating comprises abrasive particles. 
     
     
         32 - 44 . (canceled) 
     
     
         21 . A self-contained fibrous buffing article comprising;
 at least one layer of a combination of at least one fibrous nonwoven fabric and at least one woven fabric; the combination having a hardened adherent coating comprising a crosslinked binder, a lubricant, and abrasive particles, wherein the abrasive particles are less than about 15 μu.   
     
     
         46 - 48 . (canceled) 
     
     
         22 . The self-contained buffing article of claim  45  wherein the ratio of non-woven to the woven is about 1.5. 
     
     
         23 . The self-contained buffing article of claim  45 , wherein the woven fabric comprises cellulose. 
     
     
         24 . The self-contained buffing article of claim  45 , wherein the lubricant comprises at least a fatty acid, mineral oil, and glycerin. 
     
     
         25 . The self-contained buffing article of claim  45 , wherein the woven and nonwoven fabrics are mechanically entangled. 
     
     
         53 - 61 . (canceled)

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