MAGNETIC RECORDING CARTRIDGE

WIPO Patent Application WO/2024/090286

A1

The purpose of the present invention is to provide a magnetic recording cartridge with which, even when driving is performed a plurality of times in high-temperature environments, adhesion of matter does not occur, and damage to a magnetic head is mitigated.　This magnetic recording cartridge comprises a cartridge case, a reel, and a magnetic recording medium accommodated in the cartridge case while being wound on the reel, wherein, when a change in the width of the magnetic recording medium is measured over the entire length after being stored at 65℃ for 360 hours, a symbol Δout representing a change in the width on a winding outer side of the magnetic recording medium is different from a symbol Δin representing a change in the width on a winding inner side of the magnetic recording medium, and the change in the width is 0 ppm at any position in two areas on both sides of a center line of the entire length of the magnetic recording medium when the entire length is divided into four areas, and wherein the magnetic recording medium comprises a magnetic layer, the magnetic recording medium contains a fatty acid, and an extraction rate of the fatty acid defined by a specific formula is 45% or more.

YAMAGA MINORU (JP)
TAKAYAMA TAKAHIRO (JP)
SASAKI FUTOSHI (JP)
ENOMOTO TAIKEI (JP)

PCT/JP2023/037503

May 02, 2024

October 17, 2023

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SONY GROUP CORP (JP)

G11B5/70; G11B5/708; G11B5/71; G11B5/73; G11B5/738; G11B5/78; G11B5/84; G11B23/037

WO2022230308A1

2022-11-03

JP2007048427A	2007-02-22
JP2019179585A	2019-10-17
JP2001006148A	2001-01-12

WATANABE Kaoru (JP)

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