Method and apparatus for producing endless abrasive articles and a produced abrasive article

An apparatus (500) for producing endless abrasive articles (100), the apparatus (500) comprising:

• a mandrel coil (200), which comprises a first complete turn (B0A) formed of an endless mandrel belt (B0),
• one or more guiding elements (211) to feed the endless mandrel belt (B0) to an input end (IN0) of the mandrel coil (200) so as to move the surface of the first complete turn (B0A) of the mandrel coil (200),
• a feeding unit (FUNIT1) to feed a first strip (S1) on the moving surface of the first complete turn (B0A) of the mandrel coil (200), so as to form a laminated sleeve (SLEEVE1),
• one or more guiding elements (212) for unwinding the mandrel belt (B0) from an output end (OUT0) of the mandrel coil (200), and
• one or more cutting units (CU1) to form an endless abrasive article (100) by cutting the laminated sleeve (SLEEVE1).

An endless spiral wound abrasive article (100), comprising:

• a first strip (S1),
• a second strip (S2) attached to the first strip (S1) with an adhesive (ADH1), and
• abrasive grains (G1),
• wherein a first portion (S1C) of the first strip (S1) and a second portion (S1D) of the first strip (S1) define a first seam (J1), a first portion (S2C) of the second strip (S2) and a second portion (S2D) of the second strip (S2) define a second seam (J2), and the angle (γ2) between the second seam (J2) and the edge (CUT1) of the abrasive article (100) is in the range of 1° to 2.5°.