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Microcapsules for magnetic display and magnetic display sheet comprising such microcapsules

  • US 5,972,493 A
  • Filed: 08/08/1995
  • Issued: 10/26/1999
  • Est. Priority Date: 08/10/1994
  • Status: Expired due to Term
First Claim
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1. A microcapsule magnetic display sheet sequentially provided thereon with a pressure-proofing film comprising a sheet vehicle which includes an adhesive layer having the thickness in a range of 30 μ

  • m to 130 μ

    m;

    a microcapsule dispersoid layer comprising a microcapsule including, as a dispersion medium, a mixture of a low boiling point solvent and a high boiling point solvent having a boiling point higher than 175°

    C., magnetic powder and non-magnetic powder wherein said microcapsule has particles of a size of 400 μ





    m to 800 μ





    m, wherein X=10-20 and wherein particles having a particle diameter exceeding the upper limit are removed, and a transparent film.

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