公开(公告)号：US6106756A

公开(公告)日：2000-08-22

申请号：US318971

申请日：1999-05-26

申请人： Stephen Dennis Janny ,  Brian Thomas Carvill ,  Timothy Wayne Womer

发明人： Stephen Dennis Janny ,  Brian Thomas Carvill ,  Timothy Wayne Womer

IPC分类号： B29C47/00 ,  B29C47/64 ,  B29C47/88 ,  B29C47/38 ,  B29C47/60

CPC分类号： B29C47/60 ,  B29C47/0004 ,  B29C47/0014 ,  B29C47/0021 ,  B29C47/8815 ,  B29K2029/04

摘要： A method for producing a high solids aqueous solution of poly(vinyl alcohol) in which substantially dry poly(vinyl alcohol) is first fed into a specially designed single screw extruder. Heated water is introduced through a separate entry port downstream of the feed end of the extruder. A temperature of 38 to 121.degree. C. and a back pressure of at least 20,786 kPa are applied to the extruder. The mixture of poly(vinyl alcohol) and water is conveyed through transition and metering sections of the single screw extruder to dispersive and distributive mixing sections to produce a high solids poly(vinyl alcohol) solution which is substantially free of gels. The high solids poly(vinyl alcohol) solution can be used directly in the production of products such as fibers and sheets.

摘要翻译： 一种生产高固含量聚（乙烯醇）水溶液的方法，其中基本上干燥的聚（乙烯醇）首先进料到特别设计的单螺杆挤出机中。 加热水通过挤出机进料端下游的单独入口进入。 将38〜121℃的温度和至少20,786kPa的背压施加到挤出机。 将聚（乙烯醇）和水的混合物通过单螺杆挤出机的过渡和计量部分输送到分散和分配混合部分以产生基本上不含凝胶的高固含量聚（乙烯醇）溶液。 高固含量聚（乙烯醇）溶液可直接用于生产纤维和片材等产品。