Central hubs for flexible magnetic data discs formed of magnetic

Details Central hubs for flexible magnetic data discs formed of magnetic Central hubs for flexible magnetic data discs formed of magnetic

1991-04-12

1993-05-25

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2303

Patent

active

052145557

ABSTRACT:
Flexible sheet-like magnetic discs (so-called "floppy discs") are provided with a central hub formed of a magnetically soft polyacetal composition. The polyacetal composition necessarily includes a polyacetal resin and elemental iron particles homogeneously dispersed throughout the polyacetal resin in an amount sufficient to impart the desired soft magnetic properties to the inherently nonmagnetic polyacetal base resin. The polyacetal compositions of this invention are injection-moldable so that central hubs for flexible magnetic discs can be rapidly and economically produced.

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