Magnetic recording medium
    1.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号:US4582757A

    公开(公告)日:1986-04-15

    申请号:US638935

    申请日:1984-08-09

    摘要: A magnetic recording medium which comprises a non-magnetic support having on the surface side thereof a magnetic recording layer and on the opposite side thereof a backing layer having a thickness of 2 .mu.m or less, which contains carbon black and a binder and optionally, an inorganic powder, in which the backing layer contains at least two kinds of carbon black, one being fine-grained carbon black having a mean grain size of 10 to 30 m.mu. and the other being coarse-grained carbon black having a mean grain size of 150 to 500 m.mu. such that the weight ratio (P/B) of the total amount of carbon black and inorganic powder (P) to binder (B) is from about 1/0.5 to 1/3.5. The recording medium described provided smooth and stable tape-running for an extended period and a high S/N ratio.

    摘要翻译: 一种磁记录介质,其特征在于,具有非磁性载体,所述非磁性载体的表面侧具有磁记录层,并且在其相对侧上具有厚度为2μm或更小的背衬层,所述背衬层含有炭黑和粘合剂, 无机粉末,其中背衬层含有至少两种炭黑,一种是平均粒径为10至30μm的细粒炭黑,另一种是具有平均粒径的粗粒炭黑 为150〜500μm,炭黑和无机粉末(P)的总量与粘合剂(B)的重量比(P / B)为约1 / 0.5〜1 / 3.5。 所描述的记录介质延长了一段时间并且具有高S / N比的平稳和稳定的磁带运行。

    Process for producing magnetic recording media
    6.
    发明授权
    Process for producing magnetic recording media 失效
    磁记录介质的制造方法

    公开(公告)号:US4567063A

    公开(公告)日:1986-01-28

    申请号:US727216

    申请日:1985-04-25

    CPC分类号: G11B5/84

    摘要: A process for the production of magnetic recording media including a nonmagnetic support having a magnetic layer on one side thereof, and a backing layer obtained by dispersing a filler in a binder on the other side thereof, in which said backing layer is provided by:a first step of kneading and dispersing a filler and a binder by means of a roll mill to form chips,a second step of dissolving said chips in a solvent followed by dispersion effected with a sand grinder, anda third step of adding a curing agent to the obtained liquid dispersion, followed by coating.

    摘要翻译: 一种制造磁记录介质的方法,所述磁记录介质包括在其一侧上具有磁性层的非磁性载体,以及通过将填料分散在另一侧的粘合剂中而获得的背衬层,其中所述背衬层由以下部分提供: 通过辊磨机捏合和分散填料和粘合剂以形成碎片的第一步骤,将所述碎屑溶解在溶剂中随后用砂磨机分散进行的第二步骤,以及将固化剂加入到 得到的液体分散体,然后进行涂布。