MAGNETIC RECORDING ITEM
PURPOSE:To obtain titled item of high dimensional stability to moisture absorption, by providing a magnetic layer on a flexible substrate constituted by a polyester with specific intrinsic viscosity, the amounts of the terminal hydroxyl and carboxyl groups totalling a specific value or lower, also f...
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| creator | KAWASE SHIYOUJI INADA HIROO |
| description | PURPOSE:To obtain titled item of high dimensional stability to moisture absorption, by providing a magnetic layer on a flexible substrate constituted by a polyester with specific intrinsic viscosity, the amounts of the terminal hydroxyl and carboxyl groups totalling a specific value or lower, also free from hydrophilic group. CONSTITUTION:A polyester (mainly constituted by a recurring unit such as ethylene terephthalate) with an intrinsic viscosity >=0.4, the amounts of the terminal hydroxyl and carboxyl groups totalling |
| format | Patent |
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CONSTITUTION:A polyester (mainly constituted by a recurring unit such as ethylene terephthalate) with an intrinsic viscosity >=0.4, the amounts of the terminal hydroxyl and carboxyl groups totalling <=90wt% of that of the whole terminal group, also free from hydrophilic group is subjected to an extruder, etc. to deliver on the casting drum to effect quenching, thus obtaining a virtually undrawn film. This film is subsequently subjected to multistage drawing at least unidirectionally and, if required, heat-treated to produce a flexible substrate. 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CONSTITUTION:A polyester (mainly constituted by a recurring unit such as ethylene terephthalate) with an intrinsic viscosity >=0.4, the amounts of the terminal hydroxyl and carboxyl groups totalling <=90wt% of that of the whole terminal group, also free from hydrophilic group is subjected to an extruder, etc. to deliver on the casting drum to effect quenching, thus obtaining a virtually undrawn film. This film is subsequently subjected to multistage drawing at least unidirectionally and, if required, heat-treated to produce a flexible substrate. 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CONSTITUTION:A polyester (mainly constituted by a recurring unit such as ethylene terephthalate) with an intrinsic viscosity >=0.4, the amounts of the terminal hydroxyl and carboxyl groups totalling <=90wt% of that of the whole terminal group, also free from hydrophilic group is subjected to an extruder, etc. to deliver on the casting drum to effect quenching, thus obtaining a virtually undrawn film. This film is subsequently subjected to multistage drawing at least unidirectionally and, if required, heat-treated to produce a flexible substrate. On either or both surface of the substrate, a blend of a magnetic material (e.g., of iron oxide-modified type) and binder consisting mainly of organic polymer is coated to obtain the objective item.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP |
| title | MAGNETIC RECORDING ITEM |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-08T12%3A38%3A53IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=KAWASE%20SHIYOUJI&rft.date=1984-02-28&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EJPS5936129A%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |