Manufacture of wet laid nonwoven webs
    9.
    发明授权
    Manufacture of wet laid nonwoven webs 失效
    湿法非织造网的制造

    公开(公告)号:US4822452A

    公开(公告)日:1989-04-18

    申请号:US219909

    申请日:1988-07-18

    摘要: A method for forming a fibrous web by wet-laying fibers on paper-making equipment, the web comprising staple length natural or synthetic fibers and wood cellulose paper-making fibers wherein a water furnish of the fibers is made up with an associative thickener in the absence of a conventional surfactant. A preferred associative thickener for use with hydrophobic fibers is a urethane block copolymer having a polyethylene glycol backbone, the associative thickener acting as both surfactant and thickener. With predominately cellulosic fibers, i.e. conventional wood cellulose fibers, or a mixture of conventional and contorted wood fibers, and synthetic cellulosic fibers, such as rayon, a hydroxyethyl cellulose having a long alkyl side chain is preferred. Excellent consistency of the water and fiber dispersion is obtained at relatively low viscosity with rapid drainage of water from the wire and uniform formation of the web.

    摘要翻译: 一种通过在造纸设备上通过湿敷纤维形成纤维幅材的方法,所述纤维网包括短纤维天然或合成纤维和木纤维素造纸纤维,其中纤维的水配料由缔合增稠剂 不存在常规表面活性剂。 与疏水性纤维一起使用的优选缔合增稠剂是具有聚乙二醇主链的聚氨酯嵌段共聚物,缔合增稠剂既用作表面活性剂又用作增稠剂。 主要是纤维素纤维,即常规木纤维素纤维,或常规和扭曲的木纤维的混合物,以及合成纤维素纤维如人造丝,优选具有长烷基侧链的羟乙基纤维素。 水和纤维分散体的优异稠度在相对较低的粘度下得到,并且从丝网中迅速排出水分并均匀地形成网状物。

    Manufacture of wetlaid nonwoven webs
    10.
    发明授权
    Manufacture of wetlaid nonwoven webs 失效
    湿法非织造网的制造

    公开(公告)号:US4925528A

    公开(公告)日:1990-05-15

    申请号:US334604

    申请日:1989-04-06

    摘要: A method for forming a fabric web by wet-laying fibers on paper-making equipment, the web comprising staple length natural or synthetic fibers and optionally wood cellulose papermaking fibers and an adsorbed polymeric surface active agent. The method comprises making up an aqueous fiber furnish with a polymeric surfactant having a plurality of both hydrophilic and hydrophobic groupings per molecule. The polymeric surfactant is adsorbed by the fibers and may be added to the fibers or it may be included in the aqueous carrier medium. In either case, the finished web contains and is improved by the inclusion of the polymeric surfactant.

    摘要翻译: 一种通过在造纸设备上通过湿敷纤维形成织物网的方法,所述纤维网包括短纤维天然或合成纤维和任选的木质纤维素造纸纤维和吸附的聚合物表面活性剂。 该方法包括用每分子具有多个亲水和疏水基团的聚合物表面活性剂来组成含水纤维。 聚合物表面活性剂被纤维吸附并且可以加入到纤维中,或者它可以包含在载体介质中。 在任一情况下,完成的纤维网包含并通过包含聚合物表面活性剂而改善。