Abrasive article

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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428220, 428224, 428226, 428245, 428246, 428283, 428296, 428364, 428369, 428370, 428373, 428374, 51293, 51295, 51307, B24B 100, D04H 108, B32B 700

Patent

active

053668006

ABSTRACT:
A grinding material or product which may be utilized in different forms and comprises laminated layers which interlock with each other when laminated to provide greater tensile strength. Layers of the basic material are formed by sandwiching abrasive particles between two layers of pre-bonded carded fiber. One sheet of a layer is initially passed through an adhesive and later spread in a controlled fashion with abrasive particles. A second sheet of the carded fiber is passed together with the first sheet through a pair of nip rolls which compress the two sheets together with the abrasive particles therebetween and provide a first layer of adhered sheets with the abrasive particles therebetween.
Subsequently, the resulting layer may be cut into sections and a plurality laminated together for a desired thickness. In the lamination step, sufficient pressure is applied that the abrasive particles of each layer will enter the interstices of the abrasive particles of adjacent layers and form an interlocking relationship therebetween which significantly increases the tensile strength of the material by virtue of such interlocking of the abrasive particles.

REFERENCES:
patent: 2121496 (1938-06-01), Bowen
patent: 2284738 (1942-06-01), Hurst
patent: 4486200 (1984-12-01), Heyer et al.

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