Microporous membrane obtained by the irradiation of two faces and
process for obtaining the same
    1.
    发明授权
    Microporous membrane obtained by the irradiation of two faces and process for obtaining the same 失效
    通过照射两个面获得的微孔膜和获得相同的工艺

    公开(公告)号:US4855049A

    公开(公告)日:1989-08-08

    申请号:US270677

    申请日:1988-11-14

    摘要: A first irradiation takes place with particles having an inadequate energy to traverse the membrane (5), followed by a second irradiation from the other face (26) of the membrane (5) using also non-issuing particles and whose trajectories come into contact with those of the other particles. Chemical etching produces pores (respectively 33, 34), whereof some issue into other pores produced during the other irradiation. As the finest pore determines the filtering properties, the selectivity of this membrane is very good.

    摘要翻译: 发生第一次照射,其中具有不足的能量的颗粒穿过膜(5),随后使用不发出的颗粒从膜(5)的另一个面(26)进行第二次照射,并且其轨迹与 那些其他颗粒。 化学蚀刻产生孔(分别为33,34),其中一些问题发生在其他照射期间产生的其他孔中。 由于最细孔决定了过滤性能,因此该膜的选择性非常好。

    Production of asymmetrical microporous membranes by double irradiation
and asymmetrical membranes
    2.
    发明授权
    Production of asymmetrical microporous membranes by double irradiation and asymmetrical membranes 失效
    通过双重照射和不对称膜生产不对称微孔膜

    公开(公告)号:US4832997A

    公开(公告)日:1989-05-23

    申请号:US123574

    申请日:1987-11-20

    摘要: Process for the production of asymmetrical microporous membranes by double irradiation.A membrane (5) is exposed to two irradiations, whereof one has an inadequate energy level to pass through the same, whereas the other passes through membrane (5).The irradiations produce molecular defects, which are attacked or etched in preferred manner by certain chemical agents. Thus, two networks of pores are obtained, one network being of large diameter and of a non-issuing nature (26), the other being smaller (27, 28, 29) and which issue on to the two surfaces (31, 32) of membrane (5).Application to filtration and sterilization.

    摘要翻译: 通过双重照射生产不对称微孔膜的方法。 膜(5)暴露于两次照射,其中一个具有不足以通过其的能量水平,而另一个通过膜(5)。 照射产生分子缺陷,其被某些化学试剂以优选的方式进行侵蚀或蚀刻。 因此,获得两个孔网络,一个网络具有大直径和非发行性质(26),另一个网络较小(27,28,29),并且发生在两个表面(31,32)上, 的膜(5)。 适用于过滤和灭菌。