TY - JOUR AB - COMPOSITION OF THE GLASS BATCH FOR OBTAINING GLASS FIBER BY THE DIRECT METHOD FRENCH PATENT, NO. 1233368, 1960 With the ordinary method for producing continuous glass fiber from moken glass, the first step is to obtain glass balls which are fused in furnaces with die feeders, and then drawn into glass threads. According to the patent, it is possible to obtain continuous glass fiber directly by melting and firing the batch over the feeders with the die apertures in them. For this it is necessary, that during melting and fining of glass con- taining boric oxide, there are practically no gases formed and dissolved in the glass. According to the invention, this is done by melting and fining the borosilicate glass without sodium oxide, if the boric oxide is contained in the com- position in the form of a single borate or borosilicate (the patent recommends aluminum borate). All the batch com- ponents should be finely ground to pass a standard screen No. 200 (0.074 mm apertures). The following composition is especially recommended for the production of continuous glass fiber by the direct method, in %: 50-67 silica, 16.1-30.1 calcium oxide, 0-7 magnesia, 0-4 alumina, 19.5-22 aluminum borate. GLASS TI - Composition of the glass batch for obtaining glass fiber by the direct method JF - Glass and Ceramics DO - 10.1007/BF00681700 DA - 2004-11-06 UR - https://www.deepdyve.com/lp/springer-journals/composition-of-the-glass-batch-for-obtaining-glass-fiber-by-the-direct-VC4HkcWugk SP - 228 EP - 228 VL - 19 IS - 4 DP - DeepDyve ER -