Method of making a fibrous electret web using a nonaqueous polar liquid
    6.
    发明授权
    Method of making a fibrous electret web using a nonaqueous polar liquid 失效
    使用非水极性液体制造纤维驻极体网的方法

    公开(公告)号:US06454986B1

    公开(公告)日:2002-09-24

    申请号:US09416216

    申请日:1999-10-08

    IPC分类号: D06M13127

    摘要: A method of charging fibrous webs with nonaqueous polar liquids. A web 20 that contains nonconductive fibers is wetted with a nonaqueous polar liquid 14. The web 20 is then substantially dried 22 to provide a fibrous electret web. The fibrous electret web can be used as a filter in a filtration face mask 40 that is adapted to cover the nose and mouth of the wearer. The present method has the advantage over known charging methods in that the nonaqueous liquid requires less energy for drying than is required for aqueous liquids. Additionally, many filter webs can be directly wetted with nonaqueous liquids, which cannot be easily wetted with aqueous liquids.

    摘要翻译: 用非极性极性液体填充纤维网的方法。 含有非导电纤维的纤维网20用非极性极性液体14润湿。然后将幅材20基本上干燥22以提供纤维驻极体网。 纤维驻极体网可用作过滤面罩40中的过滤器,该过滤面罩40适于覆盖穿戴者的鼻子和口部。 本方法优于已知的充电方法,因为与水性液体所需的非水液体相比,非水液体需要较少的干燥能量。 此外,许多过滤网可以用非水液体直接润湿,这不会容易用含水液体润湿。