Magnetic recording medium having a magnetic layer and a coating thereunder
A magnetic recording medium comprising a nonmagnetic substrate, a liquid lubricant-containing coating layer having a porosity (U) formed on the substrate, and a magnetic layer having a porosity (M) formed directly on the coating layer. The ratio of porosity (U/M) between the coating and magnetic lay...
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| creator | YASUI HIDEAKI OIRI SHIGETO TSUKAMOTO YOJI |
| description | A magnetic recording medium comprising a nonmagnetic substrate, a liquid lubricant-containing coating layer having a porosity (U) formed on the substrate, and a magnetic layer having a porosity (M) formed directly on the coating layer. The ratio of porosity (U/M) between the coating and magnetic layers is between 0.75 and 1.25. The volume percentage of the lubricant contained in the pores of the coating layer based on the whole pore volume in the coating layer is from 35 to 85%. This improves the durability of the magnetic layer. |
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The ratio of porosity (U/M) between the coating and magnetic layers is between 0.75 and 1.25. The volume percentage of the lubricant contained in the pores of the coating layer based on the whole pore volume in the coating layer is from 35 to 85%. This improves the durability of the magnetic layer.</description><edition>7</edition><language>eng</language><subject>ADHESIVES ; CHEMICAL PAINT OR INK REMOVERS ; CHEMISTRY ; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS ; COMPOSITIONS BASED THEREON ; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ; CORRECTING FLUIDS ; DYES ; FILLING PASTES ; INFORMATION STORAGE ; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER ; INKS ; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ; METALLURGY ; MISCELLANEOUS APPLICATIONS OF MATERIALS ; MISCELLANEOUS COMPOSITIONS ; NATURAL RESINS ; ORGANIC MACROMOLECULAR COMPOUNDS ; PAINTS ; PASTES OR SOLIDS FOR COLOURING OR PRINTING ; PHYSICS ; POLISHES ; THEIR PREPARATION OR CHEMICAL WORKING-UP ; USE OF MATERIALS THEREFOR ; WOODSTAINS</subject><creationdate>2001</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20010814&DB=EPODOC&CC=US&NR=6274227B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20010814&DB=EPODOC&CC=US&NR=6274227B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YASUI HIDEAKI</creatorcontrib><creatorcontrib>OIRI SHIGETO</creatorcontrib><creatorcontrib>TSUKAMOTO YOJI</creatorcontrib><title>Magnetic recording medium having a magnetic layer and a coating thereunder</title><description>A magnetic recording medium comprising a nonmagnetic substrate, a liquid lubricant-containing coating layer having a porosity (U) formed on the substrate, and a magnetic layer having a porosity (M) formed directly on the coating layer. The ratio of porosity (U/M) between the coating and magnetic layers is between 0.75 and 1.25. The volume percentage of the lubricant contained in the pores of the coating layer based on the whole pore volume in the coating layer is from 35 to 85%. This improves the durability of the magnetic layer.</description><subject>ADHESIVES</subject><subject>CHEMICAL PAINT OR INK REMOVERS</subject><subject>CHEMISTRY</subject><subject>COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>COMPOSITIONS OF MACROMOLECULAR COMPOUNDS</subject><subject>CORRECTING FLUIDS</subject><subject>DYES</subject><subject>FILLING PASTES</subject><subject>INFORMATION STORAGE</subject><subject>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</subject><subject>INKS</subject><subject>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</subject><subject>METALLURGY</subject><subject>MISCELLANEOUS APPLICATIONS OF MATERIALS</subject><subject>MISCELLANEOUS COMPOSITIONS</subject><subject>NATURAL RESINS</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>PAINTS</subject><subject>PASTES OR SOLIDS FOR COLOURING OR PRINTING</subject><subject>PHYSICS</subject><subject>POLISHES</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><subject>USE OF MATERIALS THEREFOR</subject><subject>WOODSTAINS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2001</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZPDyTUzPSy3JTFYoSk3OL0rJzEtXyE1NySzNVchILAPxEhVyYUpyEitTixQS81KAgsn5iSUg6ZKM1KLU0ryU1CIeBta0xJziVF4ozc2g4OYa4uyhm1qQH59aXJCYnAo0Jj402MzI3MTIyNzJ0JgIJQCd4DSV</recordid><startdate>20010814</startdate><enddate>20010814</enddate><creator>YASUI HIDEAKI</creator><creator>OIRI SHIGETO</creator><creator>TSUKAMOTO YOJI</creator><scope>EVB</scope></search><sort><creationdate>20010814</creationdate><title>Magnetic recording medium having a magnetic layer and a coating thereunder</title><author>YASUI HIDEAKI ; OIRI SHIGETO ; TSUKAMOTO YOJI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US6274227B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2001</creationdate><topic>ADHESIVES</topic><topic>CHEMICAL PAINT OR INK REMOVERS</topic><topic>CHEMISTRY</topic><topic>COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>COMPOSITIONS OF MACROMOLECULAR COMPOUNDS</topic><topic>CORRECTING FLUIDS</topic><topic>DYES</topic><topic>FILLING PASTES</topic><topic>INFORMATION STORAGE</topic><topic>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</topic><topic>INKS</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</topic><topic>METALLURGY</topic><topic>MISCELLANEOUS APPLICATIONS OF MATERIALS</topic><topic>MISCELLANEOUS COMPOSITIONS</topic><topic>NATURAL RESINS</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>PAINTS</topic><topic>PASTES OR SOLIDS FOR COLOURING OR PRINTING</topic><topic>PHYSICS</topic><topic>POLISHES</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><topic>USE OF MATERIALS THEREFOR</topic><topic>WOODSTAINS</topic><toplevel>online_resources</toplevel><creatorcontrib>YASUI HIDEAKI</creatorcontrib><creatorcontrib>OIRI SHIGETO</creatorcontrib><creatorcontrib>TSUKAMOTO YOJI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YASUI HIDEAKI</au><au>OIRI SHIGETO</au><au>TSUKAMOTO YOJI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Magnetic recording medium having a magnetic layer and a coating thereunder</title><date>2001-08-14</date><risdate>2001</risdate><abstract>A magnetic recording medium comprising a nonmagnetic substrate, a liquid lubricant-containing coating layer having a porosity (U) formed on the substrate, and a magnetic layer having a porosity (M) formed directly on the coating layer. The ratio of porosity (U/M) between the coating and magnetic layers is between 0.75 and 1.25. The volume percentage of the lubricant contained in the pores of the coating layer based on the whole pore volume in the coating layer is from 35 to 85%. This improves the durability of the magnetic layer.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS |
| title | Magnetic recording medium having a magnetic layer and a coating thereunder |
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