JPS57154686A - Magnetic tape cassette - Google Patents

Magnetic tape cassette

Info

Publication number
JPS57154686A
JPS57154686A JP4117681A JP4117681A JPS57154686A JP S57154686 A JPS57154686 A JP S57154686A JP 4117681 A JP4117681 A JP 4117681A JP 4117681 A JP4117681 A JP 4117681A JP S57154686 A JPS57154686 A JP S57154686A
Authority
JP
Japan
Prior art keywords
magnetic tape
tape cassette
corrosion resistance
moldings
polyacetal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4117681A
Other languages
Japanese (ja)
Other versions
JPS6412030B2 (en
Inventor
Takashi Suzuki
Koichi Wakazono
Masaru Odagiri
Hiroshi Oguro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4117681A priority Critical patent/JPS57154686A/en
Publication of JPS57154686A publication Critical patent/JPS57154686A/en
Publication of JPS6412030B2 publication Critical patent/JPS6412030B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To improve corrosion resistance of a magnetic tape cassette storing a metallic thin film type magnetic tape, by controlling the formaldehyde extraction quantity of polyacetal resin moldings to a specific value or below. CONSTITUTION:A magnetic tape cassette storing a metallic thin film type magnetic tape which has improved corrosion resistance in comparatively high humidity is obtained by using polyacetal resin moldings whose formaldehyde extraction quantity is <=100 micrograms per 1 gram resin, as polyacetal resin moldings. In this way, in case when the formaldehyde extraction quantity is <=100mug/g resin, the polyacetal moldings do not exert influence on corrosion resistance of a tape.
JP4117681A 1981-03-19 1981-03-19 Magnetic tape cassette Granted JPS57154686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4117681A JPS57154686A (en) 1981-03-19 1981-03-19 Magnetic tape cassette

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4117681A JPS57154686A (en) 1981-03-19 1981-03-19 Magnetic tape cassette

Publications (2)

Publication Number Publication Date
JPS57154686A true JPS57154686A (en) 1982-09-24
JPS6412030B2 JPS6412030B2 (en) 1989-02-28

Family

ID=12601114

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4117681A Granted JPS57154686A (en) 1981-03-19 1981-03-19 Magnetic tape cassette

Country Status (1)

Country Link
JP (1) JPS57154686A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5137182A (en) * 1974-07-29 1976-03-29 Basf Ag Anteikasareta seikeihoriokishimechirenkara no shukioshozuru horumuarudehidonojokyohoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5137182A (en) * 1974-07-29 1976-03-29 Basf Ag Anteikasareta seikeihoriokishimechirenkara no shukioshozuru horumuarudehidonojokyohoho

Also Published As

Publication number Publication date
JPS6412030B2 (en) 1989-02-28

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