Multi-layered diskette liner

Details Multi-layered diskette liner Multi-layered diskette liner

1994-12-05

1996-12-10

Zirker, Daniel

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428195, 428286, 428287, 428288, 428301, 360133, B32B 522, B32B 2736, G11B 2303

Patent

active

055829015

ABSTRACT:
This invention generally relates to a nonwoven fabric for use as a liner for the magnetic recording medium in a computer diskette. More particularly, it is concerned with a thermally bonded, multi-layer, composite nonwoven which includes a distinct top magnetic media contacting layer having 25-100% rayon fibers, and middle and bottom layers being substantially free of rayon fibers. The middle layer is composed of a plurality of webs each comprising a blend of matrix thermoplastic fibers and binder fibers. The binder fibers in the middle layer are isolated from the two exterior layers. The bottom cartridge contacting layer comprises 100% matrix thermoplastic fibers. The cartridge contacting layer prevents the lower melt thermoplastic fibers in the middle layers from sticking to calendar rolls during thermal bonding. This structure provides a liner with superior wiping and hygroscopic dimensional stability and low debris characteristics.

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