High density para-aramid papers
    119.
    发明授权
    High density para-aramid papers 失效
    高密度对位芳族聚酰胺纸

    公开(公告)号:US4729921A

    公开(公告)日:1988-03-08

    申请号:US775577

    申请日:1985-09-17

    Abstract: High density para-aramid papers comprising 5 to 25 percent, by weight, binder and an amount of para-aramid fibers selected from the group consisting of para-aramid pulp, para-aramid floc and mixtures thereof, compacted to provide a volume percent para-aramid fiber of at least 53 minus 0.13 times the volume percent floc in the paper are useful in the preparation of circuit board substrates having a low coefficient of thermal expansion.

    Abstract translation: 包含5至25重量%的粘合剂和选自对位芳族聚酰胺纸浆,对位芳族聚酰胺絮凝物及其混合物的对位芳族聚酰胺纤维的高密度对位芳族聚酰胺纸,压制成提供体积百分比的对位芳族聚酰胺纸 纸的体积百分比絮体的至少53减去0.13倍的芳纶纤维可用于制备具有低热膨胀系数的电路板基材。

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