Process for the manufacture of abrasives

专利名称：Process for the manufacture of abrasives发明人：Eckart Teschner,Richard

Sattelmeyer,Wolfgang Hesse

申请号：US06/100910申请日：19791206公开号：US04298356A公开日：19811103

摘要：Process for the manufacture of an abrasive material comprising at least twobinder layers formed from at least one aqueous resol I prepared from a monohydricphenol and formaldehyde (molar ratio of phenol to formaldehyde 1:(1.1 to 2.5)) by theapplication of a first binder layer onto a carrier material, scattering abrasive particlesthereon, drying the covering layer in a horizontal dryer to displacement resistance andthereafter cooling with an air stream, application of a second binding agent layer and insimilar manner to the first step, drying to imprint resistance and thereafter cooling,whereby the heating and cooling are each effected by means of an air stream through slitnozzles arranged transversely to the direction of travel of the abrasive web and, afterloosely forming the product into a roll, final curing is effected on the product in rollform, the coated carrier material being conveyed at speeds above 5 m/min through thedryers which have well defined and individually controllable heating and cooling zonesand the air stream has a velocity of 5 to 200 m/s at the nozzle outlets and a temperatureof 20 to 300° C., the air being extracted through adjacent extraction nozzles.

申请人：HOECHST AKTIENGESELLSCHAFT

代理机构：Hammond & Littel, Weissenberger and Muserlian

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