| 摘要 |
PURPOSE:To prevent mixture from adhering to the inner wall of a container during the process of granulation, sufficiently transmit shock and vibration to the mixture to degas it completely, equalize the diameters of granular mixture, and shorten time of granulation by adding a small amount of tetrafluoroethylene resin to make said mixture before it is granulated. CONSTITUTION:A small amount of tetrafluoroethylene resin which causes a very low friction and is excellently non-adhesive, is added to make mixture before it is granulated. As a result, the diameters of granular mixture are more equalized and its density increases, that is to say, the granular mixture is well degassed. Besides, granulation time is shortened. A positive mixture 4 prepared from such granular mixture has a notably high specific gravity, which is not less than 96% of the true spcific gravity, and is remarkably well degassed. |
