JPS62185237A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS62185237A JPS62185237A JP61027142A JP2714286A JPS62185237A JP S62185237 A JPS62185237 A JP S62185237A JP 61027142 A JP61027142 A JP 61027142A JP 2714286 A JP2714286 A JP 2714286A JP S62185237 A JPS62185237 A JP S62185237A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic layer
- parts
- magnetic
- weight
- incorporated
- 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.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- 239000006247 magnetic powder Substances 0.000 claims description 4
- 238000005087 graphitization Methods 0.000 claims 1
- 229910002804 graphite Inorganic materials 0.000 abstract description 11
- 239000010439 graphite Substances 0.000 abstract description 11
- 239000000314 lubricant Substances 0.000 abstract description 10
- 239000006229 carbon black Substances 0.000 abstract description 9
- 239000012948 isocyanate Substances 0.000 abstract description 5
- 150000002513 isocyanates Chemical class 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
- 239000004848 polyfunctional curative Substances 0.000 abstract 1
- 229920001577 copolymer Polymers 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 8
- 235000014113 dietary fatty acids Nutrition 0.000 description 7
- 229930195729 fatty acid Natural products 0.000 description 7
- 239000000194 fatty acid Substances 0.000 description 7
- -1 fatty acid esters Chemical class 0.000 description 7
- 229920002635 polyurethane Polymers 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 150000004665 fatty acids Chemical class 0.000 description 5
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 4
- 150000002483 hydrogen compounds Chemical class 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
- 239000002216 antistatic agent Substances 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 239000010431 corundum Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 125000005395 methacrylic acid group Chemical group 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 235000021314 Palmitic acid Nutrition 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 125000005442 diisocyanate group Chemical group 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-MDZDMXLPSA-N elaidic acid Chemical compound CCCCCCCC\C=C\CCCCCCCC(O)=O ZQPPMHVWECSIRJ-MDZDMXLPSA-N 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000003353 gold alloy Substances 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 1
- VZXPHDGHQXLXJC-UHFFFAOYSA-N 1,6-diisocyanato-5,6-dimethylheptane Chemical compound O=C=NC(C)(C)C(C)CCCCN=C=O VZXPHDGHQXLXJC-UHFFFAOYSA-N 0.000 description 1
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 1
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 235000001270 Allium sibiricum Nutrition 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- APXYQFWNKAYRFS-UHFFFAOYSA-N C(C=C)(=O)O.ClC=COC=CCl Chemical compound C(C=C)(=O)O.ClC=COC=CCl APXYQFWNKAYRFS-UHFFFAOYSA-N 0.000 description 1
- 239000005635 Caprylic acid (CAS 124-07-2) Substances 0.000 description 1
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 229910020630 Co Ni Inorganic materials 0.000 description 1
- 229910002440 Co–Ni Inorganic materials 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical class OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 description 1
- 239000004472 Lysine Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- 235000021360 Myristic acid Nutrition 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 229910001096 P alloy Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- RNXZADVBNGOJOL-UHFFFAOYSA-N [Sb+]=O.[Sn+2]=O.[O-2].[Ti+4] Chemical class [Sb+]=O.[Sn+2]=O.[O-2].[Ti+4] RNXZADVBNGOJOL-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001413 amino acids Chemical group 0.000 description 1
- 150000001414 amino alcohols Chemical class 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000787 lecithin Substances 0.000 description 1
- 235000010445 lecithin Nutrition 0.000 description 1
- 229940067606 lecithin Drugs 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229960002446 octanoic acid Drugs 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- WMHSAFDEIXKKMV-UHFFFAOYSA-N oxoantimony;oxotin Chemical class [Sn]=O.[Sb]=O WMHSAFDEIXKKMV-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- MOQRZWSWPNIGMP-UHFFFAOYSA-N pentyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCCCC MOQRZWSWPNIGMP-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 125000005496 phosphonium group Chemical group 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium group Chemical group [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Landscapes
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、オーディオチーブ、ビデオテープ、磁気ディ
スク等に用いることができる磁気記録媒体に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording medium that can be used for audio recording, videotapes, magnetic disks, and the like.
従来の技術
近年、特にビデオテープにおいては、電磁変換特性の改
善のために磁性層の平滑化が精力的に進められてきた。2. Description of the Related Art In recent years, especially in video tapes, efforts have been made to smooth the magnetic layer in order to improve the electromagnetic characteristics.
それにともない、摩擦係数が増し磁気テープの走行性が
問題となっていた。Along with this, the coefficient of friction has increased and the running properties of the magnetic tape have become a problem.
そのため、磁気記録媒体の磁性層には、潤滑剤として一
般に、グラファイト、二硫化モリブデン。Therefore, graphite and molybdenum disulfide are generally used as lubricants in the magnetic layer of magnetic recording media.
二硫化タングステン等の固体潤滑剤や、高級脂肪酸及び
これら高級脂肪酸と一価のアルコールからなる脂肪酸エ
ステル、シリコーンオイル等が用いられている。又、帯
電防止を主たる目的として用いられているカーボンブラ
ックにも摩擦係数低減の効果が認められている。Solid lubricants such as tungsten disulfide, higher fatty acids, fatty acid esters made of these higher fatty acids and monohydric alcohols, silicone oil, etc. are used. Furthermore, carbon black, which is used primarily for the purpose of preventing static electricity, has been recognized to have the effect of reducing the coefficient of friction.
発明が解決しようとする問題点
しかしながらカメラ一体型ＶＴＲが普及してきた現在、
特にビデオテープは、今までよシも、劣悪な環境下で使
用されることが多くなる。８Ｍビデオテープ等、さらに
平滑な表面が要求されるようになると、従来の潤滑剤で
は、円滑な走行性を保持できなくなる。Problems that the invention aims to solveHowever, now that camera-integrated VTRs have become widespread,
In particular, video tapes are increasingly being used in harsh environments. When a smoother surface is required for products such as 8M video tape, conventional lubricants are no longer able to maintain smooth running performance.
走行性改善のため固体潤滑剤の添加量を多くすると、磁
気記録媒体に良好な走行性を付与することができるが反
面、磁性層中の磁性体の充填度が下がり、電磁変換特性
磁気特性を劣化させるので好ましくない。他方、固体潤
滑剤以外の潤滑剤を用いると、充分な潤滑性を付与する
ことができないばかシか、高温高湿でプルーミングを起
こしやすく、テープのブロッキング現象やスティックス
リップ等の原因となる。Increasing the amount of solid lubricant added to improve runnability can give the magnetic recording medium good runnability, but on the other hand, the degree of filling of the magnetic material in the magnetic layer decreases, which deteriorates the electromagnetic characteristics and magnetic properties. This is not desirable because it causes deterioration. On the other hand, if a lubricant other than a solid lubricant is used, it may not be able to provide sufficient lubricity, or it may easily cause pluming at high temperatures and high humidity, causing tape blocking phenomena and stick-slip.
本発明は上記欠点を除去できる磁気記録媒体を提供せん
とするものである。The present invention aims to provide a magnetic recording medium that can eliminate the above-mentioned drawbacks.
問題点を解決するための手段
本発明は磁性層の潤滑剤としてカーボンブラックの一部
をグラフフィト化したグラファイト化カーボンを含有す
るものである。Means for Solving the Problems The present invention contains graphitized carbon, which is a part of carbon black graphitized, as a lubricant for the magnetic layer.
作用
上記構成によシ、単にカーボンブラックとグラファイト
を混合した場合に比べ、走行性が改善されるだけでなく
、スチル寿命とヘッド摩耗においても、更に優れた性能
を発揮することが判明した。Effect: It has been found that the above structure not only improves running performance but also exhibits even better performance in terms of still life and head wear compared to the case where carbon black and graphite are simply mixed.
すなわち、スチルライフを満足させるために研磨剤を多
量に添加すると、ヘッド摩耗が大きくなるという弊害を
生じてしまうが、それを解決する手段としても、非常に
有用なものとなる。That is, if a large amount of abrasive is added in order to satisfy the still life, the disadvantage is that head wear increases, but this is also a very useful means to solve this problem.
実施列
以下、実施１３’ｌＪにより、本発明を具体的に説明す
る。EXAMPLE 1 The present invention will be specifically explained using Example 13'lJ below.
本発明に使用できる強磁性粉としては、γ−Ｆ６２０５
、Ｇｏ含有７−’Ｆｅ２Ｏ３、ＣＯ被着７−Ｆｅ２Ｏ３
、Ｆｅ ３ｏ ４、Ｃｏ含有Ｆｅ３Ｏ４、Ｏｒｏ ２等
の酸化物磁性粉、Ｆｅ 、 Ｎｉ 、 Ｇｏ 、 Ｆｅ
＝Ｎｉ−Ｇｏ金合金Ｆｅ−Ｍｎ−Ｚｎ合金、Ｆａ−Ｎｉ
−Ｚｎ合金、Ｆｅ−ｃｏ−Ｎｉ−Ｏｒ金合金Ｆｅ−Ｃｏ
−［ｉ −Ｐ 合金、Ｏｏ −Ｎ ｉ合金等Ｆｅ、Ｎ
ｉ。As the ferromagnetic powder that can be used in the present invention, γ-F6205
, Go containing 7-'Fe2O3, CO deposited 7-Fe2O3
, Fe3O4, Co-containing Fe3O4, Oro2 etc. oxide magnetic powder, Fe, Ni, Go, Fe
=Ni-Go gold alloy Fe-Mn-Zn alloy, Fa-Ni
-Zn alloy, Fe-co-Ni-Or gold alloy Fe-Co
-[i -P alloy, Oo -N i alloy, etc. Fe, N
i.
Ｃｏを主成分とするメタル磁性粉等各種の強磁性粉が挙
げられる。Examples include various ferromagnetic powders such as metal magnetic powders containing Co as a main component.
バインダー用樹脂としては、熱可塑性樹脂、熱硬化性樹
脂、電子線硬化型樹脂及びこれらと他の混合物が使用さ
れる。As the binder resin, thermoplastic resins, thermosetting resins, electron beam curable resins, and mixtures thereof with others are used.
バインダー樹脂としての熱可塑性樹脂としては軟化温度
が１５０’Ｃ以下、平均分子量が１０，０００２０、○
ｏｏ１ 重合度が約２００〜２，０００程度の物で、例
えば塩化ビニル酢酸ビニル共重合体、塩化ビニル−塩化
ビニリデン共重合体、アクリル酸エステル−アクリロニ
トリル共重合体、アクリル酸エステル−塩化ビニリデン
共重合体、アクリル酸エステル−スチレン共重合体、メ
タクリル酸エステル−アクリロニトリル共重合体、メタ
クリル酸エステル−塩化ビニリデン共重合体、メタクリ
ル酸エステル−スチレン共重合体、ウレタンエラストマ
ー、ポリ弗化ビニル、塩化ビニリデン−アクリロニトリ
ル共重合体、アクリロニトリル−ブタジェン共重合体、
ポリアミド樹脂、ポリビニルプｆ−ｙ−ル、スチレン−
ブタジェン共重合体、ポリエステル樹脂、クロロビニル
エーテル−アクリル酸エステル共重合体、アミン樹脂、
セルロース誘導体としてセルロースアセテートブチレー
ト、セルロースダイアセテート、セルローストリアセテ
ート、セルロースブロヒオネート、ニトロセルロースな
どがある。The thermoplastic resin used as the binder resin has a softening temperature of 150'C or less, an average molecular weight of 10,00020, and ○
oo1 Polymerization degree is about 200 to 2,000, such as vinyl chloride-vinylidene acetate copolymer, vinyl chloride-vinylidene chloride copolymer, acrylic ester-acrylonitrile copolymer, acrylic ester-vinylidene chloride copolymer Coalescence, acrylic ester-styrene copolymer, methacrylic ester-acrylonitrile copolymer, methacrylic ester-vinylidene chloride copolymer, methacrylic ester-styrene copolymer, urethane elastomer, polyvinyl fluoride, vinylidene chloride Acrylonitrile copolymer, acrylonitrile-butadiene copolymer,
Polyamide resin, polyvinyl plastic, styrene
Butadiene copolymer, polyester resin, chlorovinyl ether-acrylic acid ester copolymer, amine resin,
Examples of cellulose derivatives include cellulose acetate butyrate, cellulose diacetate, cellulose triacetate, cellulose brochionate, and nitrocellulose.
熱硬化性樹脂としては塗布液の状態では２００．０００
以下の分子量であシ、塗布乾燥後には縮合、付加等
の反応によシネ溶化するものが使用される。これらの樹
脂の内では、樹脂が熱分解するまでの間に軟化又は溶融
しないものが好ましい。具体的には、例えばフェノール
樹脂、エポキシ樹脂、ポリウレタン硬化型樹脂、尿素樹
脂、メラミン樹脂、アルキッド樹脂、シリコン樹脂、ア
クリル系反応樹脂、塩化ビニル−酢酸ビニル樹脂、メタ
クリル酸塩共重合体とジイソ７アネートプレポリマーの
混合物、高分子ポリエステル樹脂とジイソシアネートプ
レポリマーの混合物、尿素ホルムアルデヒド樹脂、ポリ
エステルポリオールと（ポリ）イソシアネートの混合物
、ポリアミド樹脂、低分子量グリコール、高分子量ジオ
ール、トリフェニルメタントリイソ７アネートの混合物
及びこれらの混合物等である。As a thermosetting resin, it is 200.000 in the state of coating liquid.
The molecular weight below is used, and after coating and drying, it becomes cinereous through reactions such as condensation and addition. Among these resins, those that do not soften or melt before the resin is thermally decomposed are preferred. Specifically, for example, phenol resin, epoxy resin, polyurethane curable resin, urea resin, melamine resin, alkyd resin, silicone resin, acrylic reaction resin, vinyl chloride-vinyl acetate resin, methacrylate copolymer and diiso7 Mixtures of anate prepolymers, mixtures of high molecular weight polyester resins and diisocyanate prepolymers, urea formaldehyde resins, mixtures of polyester polyols and (poly)isocyanates, polyamide resins, low molecular weight glycols, high molecular weight diols, triphenylmethane triiso7anate and mixtures thereof.
電子線硬化型樹脂としては、不飽和プレポリマー、例え
ば、無水マレイン酸タイプ、ウレタンアクリルタイプ、
ポリエステルアクリルタイプ、ポリエーテルアクリルタ
イプ、ポリウレタンアクリルタイプ、ポリアミドアクリ
ルタイプ等、又は、多官能モノマーとして、エーテルア
クリルタイプ、ウレタンアクリルタイプ、リン酸エステ
ルアクリルタイプ、アリールタイプ等が挙げられる。Examples of electron beam curable resins include unsaturated prepolymers such as maleic anhydride type, urethane acrylic type,
Polyester acrylic type, polyether acrylic type, polyurethane acrylic type, polyamide acrylic type, etc., and polyfunctional monomers include ether acrylic type, urethane acrylic type, phosphate ester acrylic type, aryl type, etc.
さらに本発明にかかる磁気記録媒体の耐久性を向上させ
るために、磁性層中に各種硬化剤を含有させることがで
き、例えば、インシアネートを含有させることができる
。Furthermore, in order to improve the durability of the magnetic recording medium according to the present invention, various hardening agents can be contained in the magnetic layer, for example, incyanate can be contained.
使用できる芳香族インシアネートは、例えばトリレンジ
イソシアネート（ＴＤＸ）、４，４−ジフェニルメタン
ジイソシアネート（ＭＤＩ）、キシリレンジイソシアネ
ート（ＸＤＩ）、メタキシリレンジイソシアネート（Ｍ
ＩＤＩ ）、及びこれらイソシアネートと活性水素化合
物との付加体であシ、平均分子量としては、１００〜３
、０００の範囲の物が好適である。Aromatic incyanates that can be used are, for example, tolylene diisocyanate (TDX), 4,4-diphenylmethane diisocyanate (MDI), xylylene diisocyanate (XDI), metaxylylene diisocyanate (M
IDI), and adducts of these isocyanates and active hydrogen compounds, and have an average molecular weight of 100 to 3.
, 000 is preferred.
一方、脂肪族インシアネートとしては、ヘキサメチレン
ジイソシアネート（ＨＭＤＩ）、リジンインシアネート
、トリメチルへキサメチレンジイソシアネート、及びこ
れらイソシアネートと活性水素化合物との付加体が挙げ
られる。これらの脂肪族インシアネート及びこれらイン
シアネートと活性水素化合物との付加体などの中でも望
ましいのは、分子量が１００〜３ 、０００ の範囲
の物である。脂肪族インシアネートのなかでも非脂環式
のイソシアネート及びこれらインシアネートと活性水素
化合物との付加体が望ましい。On the other hand, examples of aliphatic incyanates include hexamethylene diisocyanate (HMDI), lysine incyanate, trimethylhexamethylene diisocyanate, and adducts of these isocyanates and active hydrogen compounds. Among these aliphatic incyanates and adducts of these incyanates and active hydrogen compounds, those having a molecular weight in the range of 100 to 3,000 are preferred. Among the aliphatic incyanates, non-alicyclic isocyanates and adducts of these incyanates and active hydrogen compounds are preferred.
分散剤としては、レシチン及び、カプリル酸、ラウリン
酸、ミリスチン酸、パルミチン酸、ステアリン酸、オレ
イン酸、エライジン酸、リノール酸、リレイン酸等の炭
素原子数８〜１８個の脂肪酸、上記の脂肪酸のアルカリ
金７４ （Ｌｉ 、Ｎａ 、に等）又はアルカリ土類金
属（Ｍｇ、Ｃａ、Ｂａ等）からなる金属石鹸が挙げられ
る。この他に、炭素原子数１２以上の高級アルコールさ
らには硫酸エステルも使用可能である。Examples of dispersants include lecithin and fatty acids having 8 to 18 carbon atoms such as caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, elaidic acid, linoleic acid, and ryleic acid, and the above-mentioned fatty acids. Examples include metal soaps made of alkali gold 74 (Li, Na, etc.) or alkaline earth metals (Mg, Ca, Ba, etc.). In addition, higher alcohols having 12 or more carbon atoms and sulfuric esters can also be used.
研磨剤としては、溶融アルミナ、炭化ケイ素（Ｓｉｎ）
、酸化クロム、コランダム、人造コランダム、ダイアモ
ンド、人造ダイアモンド、ザクロ石、エメリー（主成分
：コランダムと磁鉄鉱）等が使用できる。As an abrasive, fused alumina, silicon carbide (Sin)
, chromium oxide, corundum, artificial corundum, diamond, artificial diamond, garnet, emery (main components: corundum and magnetite), etc. can be used.
本発明で用いられるグラファイト化カーボンにくわえて
必要に応じて次のような帯電防止剤、潤滑剤を添加する
ことができる。In addition to the graphitized carbon used in the present invention, the following antistatic agents and lubricants can be added as necessary.
帯電防止剤は、導電性粉末として、グラフフィト、酸化
スズ−酸化アンチモン系化合物、酸化チタン−酸化スズ
−酸化アンチモン系化合物、天然界面活性剤ではサポニ
ン、ノニオン界面活性剤としてアルキレンオキサイド系
、グリセリン系、グリシドール系、カチオン界面活性剤
の高級アルキルアミン類、第４級アンモニウム塩類、ピ
リジンそのｍａｉｍ類、ホスホニウム類、スルホニウム
類、アニオン界面活性剤であるカルボン酸、スルホン酸
、燐酸、硫酸エステル基、燐酸エステル基等の酸性基等
を含むアニオン界面活性剤、アミノ酸類、アミノスマホ
ン酸類、アミノアルコールの硫酸又は燐酸エステル等の
両性活性剤などが挙げられる。この他に好ましい帯電防
止剤としてカーボンブラックがある。Antistatic agents include graphite, tin oxide-antimony oxide type compounds, titanium oxide-tin oxide-antimony oxide type compounds as conductive powders, saponin as natural surfactants, alkylene oxide type and glycerin type as nonionic surfactants. , glycidol series, cationic surfactants such as higher alkyl amines, quaternary ammonium salts, pyridine and its maims, phosphoniums, sulfoniums, anionic surfactants such as carboxylic acid, sulfonic acid, phosphoric acid, sulfuric acid ester group, phosphoric acid Examples include anionic surfactants containing acidic groups such as ester groups, amino acids, aminomashonic acids, amphoteric surfactants such as sulfuric acid or phosphoric acid esters of amino alcohols, and the like. Another preferable antistatic agent is carbon black.
潤滑剤としては、シリコーンオイル、グラファイト、二
硫化モリブデン、二硫化タングステン、炭素原子数１２
〜１ｅの一塩基性脂肪酸、−価のアルコールからなる炭
素原子数２１〜２３個の脂肪酸エステルがある。As a lubricant, silicone oil, graphite, molybdenum disulfide, tungsten disulfide, carbon number 12
-1e monobasic fatty acids, C21-23 fatty acid esters consisting of -valent alcohols.
磁性塗料の混線分散にあたっては、各種の混線機が使用
される。例えば、三本ロールミル、アジテータミル、ボ
ールミル、ペブルミル、サンドグラインダー、高速スト
ーンミル、高速度衝撃ミル、ディスパー、アトライタ、
ニーグー、高速ミキサー、ホモジナイザー、コポールミ
ル、超音波分散機などが単独もしくは、組合わせて用い
られる。Various types of crosstalk devices are used to disperse magnetic paint crosstalk. For example, three roll mill, agitator mill, ball mill, pebble mill, sand grinder, high speed stone mill, high speed impact mill, disper, attritor,
Niegoo, high-speed mixer, homogenizer, Copol mill, ultrasonic dispersion machine, etc. are used alone or in combination.
以下さらに本発明を具体的に説明する。The present invention will be further explained in detail below.
実施例１
Ｆａ−Ｃｏ−Ｎｉメタル磁性粉 １００重量部ＢＥ
Ｔ比表面積５？ 扉／ｆ
ＨＯ１６０００ｓ
６ｓ １２５ ｅｍｕ／７
長軸 ｏ、２３μｍ 短軸 ０．０４μｍグラファイト
化カーボン ６重量部（５０％グラファイト
化、平均粒子径３０ｍｔｔ）ポリウレタン
１０重量部塩化ビニル−酢酸ビニル共重合体
１０重量部ａ−Ａ１２０ｓ
３Ｍ量部ミリスチン酸
１重量部ステアリン酸ペンチル １重量
部ＭＥＫ−トルｘンーＭＩＢＫ ２００重量
部（重量比２：２：１ ）
上記の組成物をボールミルで２４時間分散後、コボール
ミルで２時間分散した。Example 1 Fa-Co-Ni metal magnetic powder 100 parts by weight BE
T specific surface area 5? Door/f HO16000s 6s 125 emu/7 Long axis o, 23μm Short axis 0.04μm Graphitized carbon 6 parts by weight (50% graphitized, average particle size 30mtt) Polyurethane
10 parts by weight Vinyl chloride-vinyl acetate copolymer 10 parts by weight a-A120s
3M parts myristic acid
1 part by weight Pentyl stearate 1 part by weight MEK-Tolxone-MIBK 200 parts by weight (weight ratio 2:2:1) The above composition was dispersed in a ball mill for 24 hours, and then dispersed in a coball mill for 2 hours.
次にポリイソシアネート（コロネートＬ、日本ポリウレ
タン社製）を４部加え、平均孔径１μｍのフィルターで
ろ過する。１０μｍ厚のポリエチレンテレフタレートフ
ィルム上に塗布、配向、乾燥、カレンダー処理後硬化す
る。さらに磁性層と反対側のポリエチレンテレフタレー
トフィルム上に、カーボンブランクを主成分とするバッ
クコート層を設けて磁気テープを得た。Next, 4 parts of polyisocyanate (Coronate L, manufactured by Nippon Polyurethane Co., Ltd.) is added, and the mixture is filtered through a filter with an average pore size of 1 μm. It is coated on a 10 μm thick polyethylene terephthalate film, oriented, dried, calendered and then cured. Furthermore, a back coat layer containing carbon blank as a main component was provided on the polyethylene terephthalate film on the side opposite to the magnetic layer to obtain a magnetic tape.
比較列１
実施例１においてグラファイト化カーボン６部を同一粒
子径のカーボンブラック６部に変えた以外は、同様にし
て磁気テープを得た。Comparison row 1 A magnetic tape was obtained in the same manner as in Example 1 except that 6 parts of graphitized carbon was replaced with 6 parts of carbon black having the same particle size.
比較列２
実施例１においてグラファイト化カーボン６部をグラフ
ァイト６部に変えた以外は、同様にして磁気テープを得
た。Comparison Row 2 A magnetic tape was obtained in the same manner as in Example 1 except that 6 parts of graphitized carbon was replaced with 6 parts of graphite.
比較列３
実施列１においてグラフフィト化カーボン６部をカーボ
ンブランク３部、グラファイト３部に変えた以外は、同
様にして磁気テープを得た。Comparison Row 3 A magnetic tape was obtained in the same manner as in Example Row 1, except that 6 parts of graphite carbon was replaced with 3 parts of carbon blank and 3 parts of graphite.
実施例２
ＣＯ被着７−Ｆｅ２０３ １００重量部ＢＥ
Ｔ比表面積４３ ｗｆ／９
Ｈａ ７８０ ０ｅ
σ ｓ ａｓ ｅｍｕ／７
長軸 ０．２５．／Ａｍ 短軸 ０．０６μｍグラフ
ァイト化カーボン ６重量部（３０％グラフ
フィト化、平均粒子径３０μｍ）ポリウレタン
１０重量部ニトロセルロース
１０重量部α−人１２０．
４重量部パルミチン酸
１重量部ステアリン酸ブチル １重量部
ＭＫＫ−トルエアーＭＩＢＫ ２００重量部（
重量比２：２：１）
上記の組成物をアトライタで５時間分散後、コポールミ
ルで２時間分散した。Example 2 CO deposition 7-Fe203 100 parts by weight BE
T specific surface area 43 wf/9 Ha 780 0e σ s as emu/7 Major axis 0.25. /Am Short axis 0.06 μm graphitized carbon 6 parts by weight (30% graphitized, average particle size 30 μm) polyurethane
10 parts by weight nitrocellulose
10 parts by weight α-person 120.
4 parts by weight palmitic acid
1 part by weight Butyl stearate 1 part by weight MKK-Toluair MIBK 200 parts by weight (
Weight ratio: 2:2:1) The above composition was dispersed in an attritor for 5 hours and then dispersed in a Copol mill for 2 hours.
次にポリイソシアネート（コロネートＬ１日本ポリウレ
タン社製）を４部加え、平均孔径１μｍのフィルターで
ろ過する。１０μｍ厚のポリエチレンテレフタレートフ
ィルム上に塗布、配向、乾燥、カレンダー処理後硬化す
る。さらに磁性層と反対側のポリエチレンテレフタレー
トフィルム上に、カーボンブラックを主成分とするバッ
クコート層を設けて磁気テープを得た。Next, 4 parts of polyisocyanate (Coronate L1 manufactured by Nippon Polyurethane Co., Ltd.) is added, and the mixture is filtered through a filter with an average pore size of 1 μm. It is coated on a 10 μm thick polyethylene terephthalate film, oriented, dried, calendered and then cured. Furthermore, a back coat layer containing carbon black as a main component was provided on the polyethylene terephthalate film on the side opposite to the magnetic layer to obtain a magnetic tape.
比較例４
実施９１Ｊ ２においてグラファイト化カーボン６部を
同一粒子径のカーボンブラック６部に変えた以外は、同
様にして磁気テープを得た。Comparative Example 4 A magnetic tape was obtained in the same manner as in Example 91J2 except that 6 parts of graphitized carbon was replaced with 6 parts of carbon black having the same particle size.
比較例５
実施列２においてグラフフィト化カーボン６部をグラフ
ァイト６部に変えた以外は、同様にして磁気テープを得
た。Comparative Example 5 A magnetic tape was obtained in the same manner as in Example 2 except that 6 parts of graphite carbon was replaced with 6 parts of graphite.
比較例６
実施列３においてグラファイト化カーボン６部をカーボ
ンブランク３部、グラファイト３部に変えた以外は、同
様にして磁気テープを得た。Comparative Example 6 A magnetic tape was obtained in the same manner as in Example 3, except that 6 parts of graphitized carbon was replaced with 3 parts of carbon blank and 3 parts of graphite.
得られた各磁気テープの各特性を表１に示す。Table 1 shows the characteristics of each magnetic tape obtained.
表面粗度はＲａｎｋ Ｔａ１ｏｒ Ｈｏｂｓｏｎ社製、
Ｔａ１ｙｓｔｅｐで表面粗度Ｒａ（表面粗度の中心線よ
シの偏差の算術平均）を測定した。摩擦係数は横浜シス
テム（株）社製ＴＡＰＥ ＢＥＨＡＶＩＯＲＴＫＳＴＥ
Ｒを用いて測定した。電磁変換特性は、磁気テープをＶ
ＨＳカセットに巻き込み、記録再生ヘッドをセンダスト
ヘッドに改めた松下電器（株）社製ビデオテープレコー
ダーＮＹ−８８００を用いた。標準テープとしては、ナ
ショナルビデオチーブ５ＨＧ１２０（ＮＹ−ＴＩ ２０
ＨＧ ）ｉ用い、そのＣ／Ｎｉ０ｄＢとした。スチルラ
イフは、０℃６％ＲＨの環境下のものである。また、ヘ
ッド摩耗は、１０’０１０％ＲＨの下で１ｏｏ時間走行
させた時の摩耗量を示している。Surface roughness is Rank Ta1or manufactured by Hobson Co., Ltd.
The surface roughness Ra (arithmetic mean of the deviations from the center line of the surface roughness) was measured using Talystep. The friction coefficient is TAPE BEHAVIORTKSTE manufactured by Yokohama System Co., Ltd.
It was measured using R. The electromagnetic conversion characteristics of magnetic tape are V
A videotape recorder NY-8800 manufactured by Matsushita Electric Co., Ltd. was used in which the tape was wound into an HS cassette and the recording and reproducing head was changed to a Sendust head. The standard tape is National Video Chive 5HG120 (NY-TI 20
HG ) i was used, and its C/Ni was set to 0 dB. The still life is under an environment of 0° C. and 6% RH. Further, head wear indicates the amount of wear when running for 10 hours at 10'010% RH.
（以下余白） 発明の効果 実施列と比較例を比べてみれば明らかなように。(Margin below) Effect of the invention As is clear from the comparison between the actual series and the comparative example.
本発明で述べているグラファイト化カーボンを使用する
と、磁性層の表面性を保持したまま摩擦係数を下げるこ
とができ、安定な走行性を付与することができる。その
ため、電磁変換特性の向上がみられ、スチルライフ及び
ヘッド摩耗量に関しても、比較例に比べ優れた特性が得
られた。When the graphitized carbon described in the present invention is used, the coefficient of friction can be lowered while maintaining the surface properties of the magnetic layer, and stable running properties can be imparted. Therefore, the electromagnetic conversion characteristics were improved, and excellent characteristics were obtained in terms of still life and head wear compared to the comparative example.
Claims (3)
関し、上記磁性層にグラファイト化されたカーボンを含
有することを特徴とする磁気記録媒体。(1) A magnetic recording medium having a magnetic layer on a non-magnetic support, characterized in that the magnetic layer contains graphitized carbon.
０〜８０％であることを特徴とする特許請求の範囲第１
項記載の磁気記録媒体。(2) The graphitization rate of graphitized carbon is 2
Claim 1 characterized in that the ratio is 0 to 80%.
Magnetic recording medium described in Section 1.
、磁性粉１００重量部に対し０．５〜１０重量部である
ことを特徴とする特許請求の範囲第１項記載の磁気記録
媒体。(3) The magnetic recording medium according to claim 1, wherein the amount of graphitized carbon added to the magnetic layer is 0.5 to 10 parts by weight per 100 parts by weight of magnetic powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61027142A JPS62185237A (en) | 1986-02-10 | 1986-02-10 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61027142A JPS62185237A (en) | 1986-02-10 | 1986-02-10 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62185237A true JPS62185237A (en) | 1987-08-13 |
Family
ID=12212798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61027142A Pending JPS62185237A (en) | 1986-02-10 | 1986-02-10 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62185237A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613318A (en) * | 1984-06-15 | 1986-01-09 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS6124016A (en) * | 1984-07-11 | 1986-02-01 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS61121412A (en) * | 1984-11-19 | 1986-06-09 | Matsushita Electric Ind Co Ltd | High frequency coil |
-
1986
- 1986-02-10 JP JP61027142A patent/JPS62185237A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613318A (en) * | 1984-06-15 | 1986-01-09 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS6124016A (en) * | 1984-07-11 | 1986-02-01 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS61121412A (en) * | 1984-11-19 | 1986-06-09 | Matsushita Electric Ind Co Ltd | High frequency coil |
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