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公开(公告)号：EP2326473B1
公开(公告)日：2019-03-06
申请号：EP09812081.9
申请日：2009-08-28
发明人： YU, Qiang , SCHENCK, Ron , DIGENNARO, Salvatore , FOLSON, Stephen , HENRY, Kevin , GUINED, Tim
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公开(公告)号：EP2326473A2
公开(公告)日：2011-06-01
申请号：EP09812081.9
申请日：2009-08-28
发明人： YU, Qiang , SCHENCK, Ron , DIGENNARO, Salvatore , FOLSON, Stephen , HENRY, Kevin , GUINED, Tim
CPC分类号： C04B28/145 , B01F3/1271 , B01F5/0413 , B28B19/0092 , B28C7/0418 , C04B2111/0062 , C04B14/42 , C04B22/16 , C04B24/22 , C04B24/38 , C04B40/0028
摘要： The present invention provides a wet starch preparation system for gypsum wallboard comprising a loss-in-weight starch feeder, a venturi mixer, a vacuum pick-up unit for supplying the dry starch from the feeder at an adjustable rate to the venturi mixer, a first water pump for supplying water at an adjustable rate to the venturi mixer to form a starch pre-dispersion of from about 2% to about 10% by weight starch and a second water pump for supplying gauging water to the starch pre-dispersion, the system equipped with appropriate system controls. The present system provides more efficient use of starch such that the amount of pregelatinized starch is at least about 10% less than a system in which the starch is not pre-dispersed in water prior to the board mixer. The system can be used to make gypsum-containing products including gypsum wallboard having increased board strength and reduced board weight.
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