磁気テープ走行特性に関する磁気テープ表面の評価法

抄録

In a few cases, we have had troubles with magnetic tape stations, such as unusual tape movement. After research on this problem, we have found a cause for these accidents.
We found the existence of sticky materials of molecular weight (several ten thousands) in the tape was the potential factor. The factor can be assessed by running the extract of tape by Freon TMC® through a gell permeation chromatograph.
In practice the trouble occurs combining it with the factors of equipment and environment. Thus, we developed what we call a “Press Binding Test”, employing these constant factors, as a good evaluation method to assess the surface of the magnetic tapes.
Although only a small fraction of the magnetic tapes passed this test about 10 years ago, almost all of the recent new computer tapes have pass this test.