Magnetic recording medium
    3.
    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。

    Magnetic recording medium having a subbing layer of amorphous saturated
polyesters
    10.
    发明授权
    Magnetic recording medium having a subbing layer of amorphous saturated polyesters 失效
    具有无定形饱和聚酯底层的磁记录介质

    公开(公告)号:US4504542A

    公开(公告)日:1985-03-12

    申请号:US515737

    申请日:1983-07-21

    摘要: A magnetic recording medium is disclosed. The medium is comprised of a support base having position thereon a subbing layer and a magnetic layer. The subbing layer is comprised of an amorphous saturated polyester having a glass transition temperature of 10.degree. C. to 60.degree. C. The recording medium provided has excellent adhesiveness between the magnetic layer and the support due to the presence of the subbing layer. Furthermore, the resulting magnetic recording medium provides excellent electromagnetic characteristics such as a desirable video S/N ratio.

    摘要翻译: 公开了一种磁记录介质。 所述介质包括其上具有底层和磁性层的位置的支撑基底。 底层由玻璃化转变温度为10℃至60℃的无定形饱和聚酯组成。由于存在着底层,所提供的记录介质具有优异的磁性层与载体之间的粘附性。 此外,所得到的磁记录介质提供了优异的电磁特性,例如期望的视频S / N比。