Porous article and process for producing porous article
    78.
    发明授权
    Porous article and process for producing porous article 有权
    多孔制品和多孔制品生产工艺

    公开(公告)号:US06387969B1

    公开(公告)日:2002-05-14

    申请号:US09655441

    申请日:2000-09-05

    Abstract: A porous article having excellent heat resistance, a finely cellular structure, and a low dielectric constant; and a process for producing the porous article which comprises subjecting a polymer composition having a micro-domain structure comprising a continuous polymer phase and dispersed therein a discontinuous phase having an average diameter smaller than 10 &mgr;m to a treatment for removing the ingredient constituting the discontinuous phase by at least one operation selected from vaporization and decomposition and by an extraction operation to thereby make the polymer porous. The ingredient constituting the discontinuous phase has a weight average molecular weight of, e.g., 10,000 or lower. Liquefied carbon dioxide, supercritical carbon dioxide, or the like can be used as an extraction solvent for the ingredient constituting the discontinuous phase.

    Abstract translation: 具有优异的耐热性,细孔结构和低介电常数的多孔制品; 以及一种制造多孔制品的方法,该方法包括使包含连续聚合物相的微结构结构的聚合物组合物分散在平均直径小于10μm的不连续相中,以除去构成不连续相的成分 通过选自蒸发和分解的至少一种操作和通过萃取操作,从而使聚合物多孔。 构成不连续相的成分的重均分子量例如为10,000以下。 可以使用液化二氧化碳,超临界二氧化碳等作为构成不连续相的成分的提取溶剂。

    Process for making a nonwoven, porous fabric from polymer composite
materials
    80.
    发明授权
    Process for making a nonwoven, porous fabric from polymer composite materials 失效
    从聚合物复合材料制造无纺布,多孔织物的方法

    公开(公告)号:US6071451A

    公开(公告)日:2000-06-06

    申请号:US1781

    申请日:1997-12-31

    Abstract: The present invention is a method for producing a nonwoven fabric from a water modifiable polyolefin-containing film. In order to produce the fabric where polyethylene is the minority constituent, a polymer blend is formed with the polyethylene as the dispersed phase and polyethylene oxide as the continuous phase. In another embodiment wherein the polyethylene is the majority constituent and the polyethylene oxide is the minority constituent of the film, a reactive blend created during processing exhibits an inverse phase morphology so that the polyethylene oxide becomes the continuous phase and the polyethylene becomes the dispersed phase. In either embodiment, the film is then treated with an aqueous solvent to remove the polyethylene oxide to produce the nonwoven, porous fabric. The resulting nonwoven, porous fabric has a silk-like hand and shine ideal for disposable personal hygiene articles, and is flushable through waste water disposal systems.

    Abstract translation: 本发明是从含水可变性聚烯烃的膜制造无纺布的方法。 为了生产聚乙烯是少数成分的织物,以聚乙烯为分散相,聚环氧乙烷为连续相形成聚合物共混物。 在其中聚乙烯是多数成分并且聚环氧乙烷是薄膜的少数成分的另一个实施方案中,在加工过程中产生的反应性共混物显示出反相形态,使得聚环氧乙烷变为连续相,聚乙烯成为分散相。 在任一实施方案中,然后用水性溶剂处理膜以除去聚环氧乙烷以产生无纺布多孔织物。 所得非织造布的多孔织物具有丝状手感和光泽,是一次性个人卫生用品的理想选择,可通过废水处理系统进行冲洗。

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