(19)
(11) EP 0 331 344 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.08.1991 Bulletin 1991/32

(43) Date of publication A2:
06.09.1989 Bulletin 1989/36

(21) Application number: 89301732.7

(22) Date of filing: 22.02.1989
(51) International Patent Classification (IPC)4: B24D 11/00
(84) Designated Contracting States:
AT CH DE FR GB IT LI

(30) Priority: 26.02.1988 US 160776

(71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
St. Paul, Minnesota 55133-3427 (US)

(72) Inventors:
  • Calhoun, Clyde D. c/o Minnesota Mining and
    St. Paul Minnesota 55133-3427 (US)
  • Foss, George D. c/o Minnesota Mining and
    St. Paul Minnesota 55133-3427 (US)
  • Fleming, Maurice J. c/o Minnesota Mining and
    St. Paul Minnesota 55133-3427 (US)
  • Bruxvoort, Wesley J. c/o Minnesota Mining and
    St. Paul Minnesota 55133-3427 (US)

(74) Representative: Baillie, Iain Cameron et al
c/o Ladas & Parry Altheimer Eck 2
80331 München
80331 München (DE)


(56) References cited: : 
   
       


    (54) Abrasive sheeting having individually positioned abrasive granules


    (57) Abrasive sheeting can produce fine finishes at surprisingly high cutting rates when its abrasive granules are individually positioned in a predetermined pattern, with an uncoated portion of virtually every granule protruding from the surface of the binder layer. Each of the abrasive granules preferably is a spherical composite of a large number of abrasive grains in a binder. For example, abrasive grains having a mean dimension of about 4 µm can be bonded together to form spherical abrasive granules of virtually identical diameters, preferably within a range of from 25 to 100 µm.







    Search report