公开(公告)号：US5690787A

公开(公告)日：1997-11-25

申请号：US622498

申请日：1996-03-25

申请人： David Paul Hultman ,  Donald David Watson ,  Edward Walter Heribacka

发明人： David Paul Hultman ,  Donald David Watson ,  Edward Walter Heribacka

IPC分类号： D21H17/53 ,  D21H17/36 ,  D21H19/20 ,  D21H19/74 ,  D21H21/22 ,  D21H19/60

CPC分类号： D21H19/20 ,  D21H17/36 ,  D21H19/74 ,  D21H21/22

摘要： A method of forming a polymer-reinforced paper which includes preparing an aqueous suspension of fibers, at least about 50 percent, by dry weight, of which are cellulosic fibers; distributing the suspension on a forming wire; removing water from the distributed suspension to form a paper; and treating the paper thus formed with a polymer-reinforcing medium which contains a bulking agent to give the polymer-reinforced paper. The treatment of the paper is adapted to provide in the polymer-reinforced paper from about 15 to about 70 percent, by weight, of bulking agent, based on the dry weight of the cellulosic fibers in the paper. Alternatively, the bulking agent can be added to a polymer-reinforced paper after it has been formed. In certain embodiments, the bulking agent is a polyhydric alcohol. In other embodiments, the bulking agent is a polyethylene glycol having a molecular weight in the range of from about 100 to about 1,500. The polymer-reinforced paper has improved cross-direction tear when tested with an Elmendorf Tear Tester in accordance with TAPPI Method T414, particularly when the paper has a moisture content no greater than about 5 percent by weight.

摘要翻译： 一种形成聚合物增强纸的方法，其包括制备纤维的水性悬浮液，至少约50％，其中干纤维素纤维是纤维素纤维; 将悬浮液分布在成形网上; 从分布式悬浮液中除去水以形成纸张; 并用含有填充剂的聚合物增强介质处理由此形成的纸，得到聚合物增强纸。 纸的处理适于在聚合物增强纸中提供约15至约70重量％的填充剂，基于纸中纤维素纤维的干重。 或者，填充剂可以在其形成之后加入到聚合物增强纸中。 在某些实施方案中，填充剂是多元醇。 在其它实施方案中，填充剂是分子量在约100至约1500范围内的聚乙二醇。 当根据TAPPI方法T414使用Elmendorf撕裂试验仪进行测试时，聚合物增强纸具有改进的横向撕裂，特别是当纸的含水量不超过约5重量％时。