JPH01106318A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPH01106318A JPH01106318A JP26320787A JP26320787A JPH01106318A JP H01106318 A JPH01106318 A JP H01106318A JP 26320787 A JP26320787 A JP 26320787A JP 26320787 A JP26320787 A JP 26320787A JP H01106318 A JPH01106318 A JP H01106318A
- Authority
- JP
- Japan
- Prior art keywords
- density
- magnetic
- magnetic layer
- conversion characteristics
- electromagnetic conversion
- 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
- 230000003746 surface roughness Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 239000006247 magnetic powder Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001771 impaired effect Effects 0.000 abstract description 2
- 239000012762 magnetic filler Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 12
- -1 inorganic acid ester Chemical class 0.000 description 8
- 238000000576 coating method Methods 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000003490 calendering Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 150000002483 hydrogen compounds Chemical class 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
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- 229910052593 corundum Inorganic materials 0.000 description 3
- 239000010431 corundum Substances 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Chemical class 0.000 description 3
- 229930195729 fatty acid Chemical class 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 229910001096 P alloy Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 238000007754 air knife coating Methods 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
- 150000004665 fatty acids Chemical class 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
- 239000006224 matting agent Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000013034 phenoxy resin Substances 0.000 description 2
- 229920006287 phenoxy resin Polymers 0.000 description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 239000011701 zinc Substances 0.000 description 2
- BHHYHSUAOQUXJK-UHFFFAOYSA-L zinc fluoride Chemical compound F[Zn]F BHHYHSUAOQUXJK-UHFFFAOYSA-L 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- HXDLWJWIAHWIKI-UHFFFAOYSA-N 2-hydroxyethyl acetate Chemical compound CC(=O)OCCO HXDLWJWIAHWIKI-UHFFFAOYSA-N 0.000 description 1
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 239000005997 Calcium carbide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229910017112 Fe—C Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 229910018104 Ni-P Inorganic materials 0.000 description 1
- 229910018536 Ni—P Inorganic materials 0.000 description 1
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Chemical group 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
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- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 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
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 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
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 150000001414 amino alcohols Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
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- 229910052804 chromium Inorganic materials 0.000 description 1
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- 230000000295 complement effect Effects 0.000 description 1
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- 239000010432 diamond Substances 0.000 description 1
- 229940117389 dichlorobenzene Drugs 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 125000004185 ester group Chemical group 0.000 description 1
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- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
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- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 229910001337 iron nitride Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000007759 kiss coating Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
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- 239000002736 nonionic surfactant Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- WMHSAFDEIXKKMV-UHFFFAOYSA-N oxoantimony;oxotin Chemical class [Sn]=O.[Sb]=O WMHSAFDEIXKKMV-UHFFFAOYSA-N 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Chemical group 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical compound [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
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- 239000004417 polycarbonate Substances 0.000 description 1
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- 229920005672 polyolefin resin Polymers 0.000 description 1
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- 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
- 238000007763 reverse roll coating Methods 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical class NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Paints Or Removers (AREA)
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Abstract
Description
本発明は磁気記録媒体に関し、特に生産性のよい該媒体
の構成に関する。The present invention relates to a magnetic recording medium, and particularly to a configuration of the medium with high productivity.
情報処理機器に於る磁気記録媒体は、記録・再生素子と
して甚だ有用でありその需要は大きいが、同時に記録媒
体として、電磁変換特性が高度、精密であること、記録
容量が豊かで高密度であること、走行性、耐久性、耐用
性を保証する好適な組成物性であること、廉価であるこ
と更に生産面からは生産技術上にトラブルがないこと等
が要求され、その要求に沿って様々の技術的努力が佛わ
れて来に。
一般に良好な電磁変換特性をうるためには磁性層中の磁
性粉を高密度に充填させ、また薄層であることが好まし
く、バインダなしの気相堆積した磁性層が賞月される由
縁であるが、コスト高でありまた生産量の確保に難があ
る。
また前記電磁変換特性は磁性層側の構成層表面を平滑に
加工する必要があり、磁性粉及びフィシ類の粒度の選定
及びカレンダ処理が施される。カレンダ処理で150k
g/am程度のカレンダ圧をかければ乾燥後構成層表面
凹凸が平滑化され、また溶媒揮発によって生ずる気泡の
圧潰によると思われる体積縮小によって20%程度減少
し高密度化することができ、更にカレンダ圧を上げれば
3.0g/cs+”程度の密度とすることは可能である
。
しかしながらカレンダ処理による加工度を上げ表面平均
粗さRaを下げることは同時にコスト高と生産性の低下
を呼び1.更に表面が平滑にすぎることによる摩擦係数
の増大、走行性不良をもたらすので、カレンダ加工度は
適度に止めるべきものである。
既に生産性の面から、素材その他の改善によって磁性層
を低密度、且つRaを大きいままとする磁気記録媒体の
試みがされているが、コストダウンの効果はあるとして
も原始の形態に戻った結果の特性劣化の咎めは免れない
。Magnetic recording media in information processing equipment are extremely useful as recording and reproducing elements, and there is a large demand for them, but at the same time, as recording media, they must have advanced and precise electromagnetic conversion characteristics, rich storage capacity, and high density. It is required that the composition be suitable for ensuring runnability, durability, and durability, that it be inexpensive, and that there be no troubles in production technology from a production standpoint. Since then, the technological efforts have been outstanding. Generally, in order to obtain good electromagnetic conversion characteristics, it is preferable that the magnetic powder in the magnetic layer be packed densely and that the layer be thin, which is why magnetic layers deposited in a vapor phase without a binder are prized. However, the cost is high and it is difficult to secure production volume. Further, in order to obtain the electromagnetic conversion characteristics, it is necessary to process the surface of the constituent layers on the magnetic layer side to be smooth, and therefore, selection of the particle size of the magnetic powder and fissures and calendering are performed. 150k with calendar processing
By applying a calender pressure of about g/am, the unevenness on the surface of the constituent layer after drying can be smoothed, and the volume can be reduced by about 20% due to the collapse of bubbles caused by solvent volatilization, making it possible to increase the density. It is possible to achieve a density of about 3.0 g/cs+" by increasing the calender pressure. However, increasing the degree of workability by calendering and lowering the average surface roughness Ra also increases costs and reduces productivity. Furthermore, if the surface is too smooth, the coefficient of friction increases and running properties become poor, so the degree of calendering should be moderated.From the viewpoint of productivity, the density of the magnetic layer has already been reduced by improving the material and other aspects. Attempts have been made to create a magnetic recording medium in which Ra remains high, but even if it is effective in reducing costs, it is inevitable that the characteristics will deteriorate as a result of returning to the original form.
本発明の目的は、生産性の面から磁気記録媒体(以後磁
気テープで総称する)の磁性層を比較的低密度に止めた
而も電磁・変換特性の良好な磁気テープの提供にある。An object of the present invention is to provide a magnetic recording medium (hereinafter generically referred to as magnetic tape) whose magnetic layer has a relatively low density from the viewpoint of productivity and yet has good electromagnetic and conversion characteristics.
前記した本発明の目的は、非磁性支持体上に磁性層を有
する磁気記録媒体に於て、磁性層の密度が1.7〜2.
0g/am3であり、また前記硼珪層側表面の粗さが0
.015μI以下であることを特徴とする磁気記録媒体
によって達成される。
本発明に於て、磁性層の密度は1.7〜2.9g/am
3であって、密度が17g7cm3を切るときは電磁変
換特性の不全を招き、また2、0g/cm”を上廻る場
合には特性向上に効用を及ぼすことなく素材、工程費を
浪費することになり、本発明の目的に背馳する。
また表面平均粗さRaは0.015μm以下であって、
好ましくは0.06〜0.015μmの範囲である。R
aが0.015μmを超えると電磁変換特性を損い、ま
た0、006μm未満となると摩擦抵抗が増し走行性に
問題を生じ、またシンチングを起し易い。
前記した密度及び表面平均粗さRaの調節は本発明に於
てはカレンダ処理に於るカレンダ圧、カレンダ速度或は
温度等の工程条件によって制御される。尚磁性粉、フィ
ラ類の粒度の調節を加味してもよい。
また各種フィラ類の含有量は磁性粉に対して0.1〜5
wt%程度である。
本発明に於ては従来磁気テープ製造に用いられる装置及
び素材技術が流用される。
本発明に用いられる磁性材料としては、例えばγ−Fe
、0..Co含有γ−Fe203.Co被被着−Fe、
O= 、Fe5Oa rCo含有Fe、O,、Co被着
Fe、04.Cr01等の酸化物磁性体、例えばFe、
Ni、Fe−Ni合金、Fe−Co合金、pe−Ni−
P合金、Fe−旧−Co合金、 Fe−Mn−Zn合金
、Fe−Ni−Zn合金、Fe−C。
−N 1−Cr合金、 pe−Co−Ni−P合金、G
o−P合金、Co−Cr合金等Fe、Ni、Coを主成
分とするメタル磁性粉等各種の強磁性体が挙げられる。
これらの金属磁性体に対する添加物としてはSi 、C
u、Zn、Aff、P、Mn、Cr等の元素又はこれら
の化合物が含まれていても良い。またバリウムフェライ
ト等の六方晶系フェライト、窒化鉄等も使用される。
本発明に用いられるバインダとしては、耐摩耗性のある
ポリウレタンが挙げられる。これは、他の物質に対する
接着力が強く、反復して加る応力または屈曲に耐えて機
械的に強靭であり、且つ耐摩耗性、耐候性が良好である
。
またポリウレタンの他に、繊維素系樹脂及び塩化ビニル
系共重合体を併用すれば、磁性層中の磁性粉の分散性が
向上してその機械的強度が増大する。ただし繊維素系樹
脂及び塩化ビニル系共重合体のみでは層が硬くなりすぎ
るが、これは上述のポリウレタンの存在によって防止で
きる。
使用可能な繊維素系樹脂には、セルロースエーテル、セ
ルロース無機酸エステル、セルロース有機酸エステル等
が使用できる。上記の塩化ビニル系共重合体は、部分的
に加水分解されていてもよい。塩化ビニル系共重合体と
して、好ましくは、塩化ビニル−酢酸ビニルを含んだ共
重合体が挙げられる。
まI;フェノキシ樹脂も使用することができる。
フェノキシ樹脂は機械的強度が大きく、寸度安定性にす
ぐれ、耐熱、耐水、耐薬品性がよく、接着性がよい等の
長所を有する。
これらの長所は前記したポリウレタンと長短相補ってテ
ープ物性の経時安定性を著しく高めることができる。
更に前記したバインダの他、熱可塑性樹脂、熱硬化性樹
脂、反応型樹脂、電子線照射硬化型樹脂との混合物が使
用されてもよい。
本発明の磁気テープの磁性層の耐久性を向上させるため
に磁性塗料に各種硬化剤を含有させることができ、例え
ばインシアナートを含有させることができる。
芳香族インシアナートとしては、例えばトリレンジイソ
シアナート(TD[)等及びこれらインシアナート活性
水素化合物との付加体などがあり、平均分子量としては
100〜3,000の範囲のものが好適である。
また脂肪族インシアナートとしては、ヘキサメチレンジ
イソシアナート(HMDI)等及びこれらイソシアナー
トと活性水素化合物の付加体等が挙げられる。これらの
脂肪族インシアナート及びこれらインシアナートと活性
水素化合物の付加体などの中でも、好ましいのは分子量
が100〜3.000の範囲のものである。脂肪族イン
シアナートのなかでも非脂環式のインシアナート及びこ
れら化合物と活性水素化合物の付加体が好ましい。
上記磁性層を形成するのに使用される磁性塗料には分散
剤が使用され、また必要に応じ潤滑剤、研磨剤、マット
剤、帯電防止剤等の添加剤を含有させてもよい。本発明
に使用される分散剤としては、本発明に係る燐酸エステ
ルの外に、アミン化金物、アルキルサルフェート、脂肪
酸アミド、高級アルコール、ポリエチレンオキサイド、
スルホ琥珀酸、スルホ琥珀酸エステル、公知の界面活性
剤等及びこれらの塩があり、また、陰性有機基(例えば
−Cool)を有する重合体分散剤の塩を使用すること
も出来る。これら分散剤は1種類のみで用いても、或は
2種類以上を併用してもよい。 また、潤滑剤としては
、シリコーンオイル、ゲラファライト、カーボンブラッ
クグラフトポリマ、二硫化モリブテン、二硫化タングス
テン、ラウリル酸、ミリスチン酸、炭素原子数12〜1
6の一塩基性脂肪酸と該脂肪酸の炭素原子数と合計して
炭素原子数が21〜23個の一価のアルコールから成る
脂肪酸エステル(いわゆる蝋)等も使用できる。これら
の潤滑剤はバインダ100重量部に対して0.2〜20
重量部の範囲で添加される。
研磨剤としては、一般に使用される材料で溶融アルミナ
、炭化珪素、酸化クロム、コランダム、人造コランダム
、人造ダイヤモンド、ざくろ石、エメリ(主成分:コラ
ンダムと磁鉄鉱)等が使用される。これらの研磨剤は平
均粒子径0,05〜5μmの大きさのものが使用され、
特に好ましくは0.1〜2μmである。これらの研磨剤
はバインダ100重量部に対して1〜20重量部の範囲
で添加される。
マット剤としては、有機質粉末或は無機質粉末を夫々に
或は混合して用いられる。
本発明に用いられる有機質粉末としては、アクリルスチ
レン系樹脂、ベンゾグアナミン系樹脂粉末、メラミン系
樹脂粉末、フタロシアニン系顔料が好ましいが、ポリオ
レフィン系樹脂粉末、ポリエステル系樹脂粉末、ポリア
ミド系樹脂粉末、ポリイミド系樹脂粉末、ポリ弗化エチ
レン樹脂粉末等も使用でき、無機質粉末としては酸化珪
素、酸化チタン、酸化アルミニウム、炭酸カルシウム、
硫酸バリウム、酸化亜鉛、酸化錫、酸化アルミニウム、
酸化クロム、炭化珪素、炭化カルシウム、α−Fe20
3、タルク、カオリン、硫酸カルシウム、窒化硼素、弗
化亜鉛、二酸化モリブテンが挙げられる。
帯電防止剤としては、カーボンブラックをはじめ、グラ
ファイト、酸化錫−酸化アンチモン系化合物、酸化チタ
ン−酸化錫−酸化アンチモン系化合物などの導電性粉末
;サポニンなどの天然界面活性剤;アルキレンオキサイ
ド系、グリセリン系、グリシドール系などのノニオン界
面活性剤: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、その他の複素環類、ホスホニウムまた
はスルホニウム類などのカチオン界面活性剤:カルポン
酸、スルホン酸、燐酸、硫酸エステル基、燐酸エステル
基等の酸性基を含むアニオン界面活性剤ニアミノ酸類、
アミノスルホン酸類、アミノアルコールの硫酸または燐
酸エステル類等の両性活性剤などがあげられる。
上記塗料に配合される溶媒或はこの塗料の塗布時の希釈
溶媒としては、アセトン、メチルエチルケトン、メチル
イソブチルケトン、シクロヘキサノン等のケトン類;メ
タノール、エタノール、プロパツール、ブタノール等の
アルコール類:酢酸メチル、酢酸エチル、酢酸ブチル、
乳酸エチル、エチレングリコールモノアセテート等のエ
ステル類;グリコールジメチルエーテル、グリコールモ
ノエチルエーテル、ジオキサン、テトラヒドロフラン等
のエーテル類;ベンゼン、トルエン、キシレン等の芳香
族炭化水素;メチレンクロライド、エチレンクロライド
、四塩化炭素、クロロホルム、ジクロルベンゼン等のハ
ロゲン化炭化水素等のものが使用できる。
また、支持体としては、ポリエチレンテレフタレート、
ポリエチレン−2,6−ナフタレート等のポリエステル
類、ポリプロピレン等のポリオレフィン類、セルロース
トリアセテート、セルロースダイアセテート等のセルロ
ース誘導体、ポリアミド、ポリカーボネートなどのプラ
スチックが挙げられるが、Cu、IMI、Zn等の金属
、ガラス、窒化硼素BN、Siカーバイド等のセラミッ
クなども使用できる。
これらの支持体の厚みはフィルム、シート状ノ場合は約
3〜100μ謂程度、好ましくは5〜50μ諺であり、
ディスク、カード状の場合は30μ冨〜10mm程度で
あり、ドラム状の場合は円筒状で用いられ、使用するレ
コーダに応じてその型は決められる。
上記支持体と磁性層の中間には接着性を向上させる中間
層を設けても良い。
支持体上に上記磁性層を形成するための塗布方法として
は、エアーナイフコート、ブレードコート、エアーナイ
フコート、スクイズコート、含浸コート、リバースロー
ルコート、トランス7アロールコート、グラビアコート
、キスコート、キャストコート、スプレィコート等が利
用できるがこれらに限らない。
〔実施例〕
本発明を実施例を用いて具体的に説明する。
実施例1.2及び比較例(1)、(2’)下記衣−1の
磁性塗料処方に従って磁気テープ11efF@Let!
1”6“”vf:°、・パ、以下金印′1.2゛で2、
・′
:磁性塗料処方:
上記処方で混合、分散し、添加剤を加えて希釈し、塗布
、乾燥し、スーパカレンダ処理を施した。
カレンダ条件:
実施例1及び比較例(1)・60℃、100kg/cm
比較例(2)・80℃、300kg/am特性測定の結
果を表−2に示す。 711、以下余白′−
表2に示されるよう、に実施例試料1は電磁変換特性に
於て比較例(1)及び(2)に何部遜色なく且っカレン
ダ処理工程に於る効率を少くとも15%節減することが
できる。
出願人 小西六写真工業株式会社The object of the present invention described above is to provide a magnetic recording medium having a magnetic layer on a non-magnetic support, in which the density of the magnetic layer is 1.7 to 2.
0 g/am3, and the roughness of the surface on the borosilicate layer side is 0.
.. This is achieved by a magnetic recording medium characterized by a magnetic recording capacity of 0.015 μI or less. In the present invention, the density of the magnetic layer is 1.7 to 2.9 g/am.
3, if the density is less than 17g/cm3, it will lead to failure of electromagnetic conversion characteristics, and if it exceeds 2.0g/cm, it will waste materials and process costs without having any effect on improving the characteristics. This goes against the purpose of the present invention.Also, the surface average roughness Ra is 0.015 μm or less,
Preferably it is in the range of 0.06 to 0.015 μm. R
If a exceeds 0.015 μm, the electromagnetic conversion characteristics will be impaired, and if it is less than 0.006 μm, frictional resistance will increase, causing problems in running performance and shinching. In the present invention, the above-mentioned density and average surface roughness Ra are controlled by process conditions such as calender pressure, calender speed, and temperature in calendering. In addition, the particle size of the magnetic powder and fillers may be adjusted. In addition, the content of various fillers is 0.1 to 5% relative to the magnetic powder.
It is about wt%. In the present invention, equipment and material techniques conventionally used for manufacturing magnetic tapes are used. Examples of the magnetic material used in the present invention include γ-Fe
,0. .. Co-containing γ-Fe203. Co-deposited-Fe,
O=, Fe5Oa rCo-containing Fe, O,, Co-coated Fe, 04. Oxide magnetic material such as Cr01, e.g. Fe,
Ni, Fe-Ni alloy, Fe-Co alloy, pe-Ni-
P alloy, Fe-old-Co alloy, Fe-Mn-Zn alloy, Fe-Ni-Zn alloy, Fe-C. -N1-Cr alloy, pe-Co-Ni-P alloy, G
Examples include various ferromagnetic materials such as o-P alloy, Co-Cr alloy, and metal magnetic powder containing Fe, Ni, and Co as main components. Additives to these metal magnetic materials include Si and C.
Elements such as u, Zn, Aff, P, Mn, and Cr, or compounds thereof may be included. Hexagonal ferrite such as barium ferrite, iron nitride, etc. are also used. The binder used in the present invention includes abrasion-resistant polyurethane. It has strong adhesion to other substances, is mechanically strong to withstand repeated stress or bending, and has good abrasion resistance and weather resistance. Furthermore, if a cellulose resin and a vinyl chloride copolymer are used in combination with polyurethane, the dispersibility of the magnetic powder in the magnetic layer will be improved and its mechanical strength will be increased. However, if only the cellulose resin and the vinyl chloride copolymer are used, the layer becomes too hard, but this can be prevented by the presence of the above-mentioned polyurethane. Usable cellulose resins include cellulose ether, cellulose inorganic acid ester, cellulose organic acid ester, and the like. The vinyl chloride copolymer described above may be partially hydrolyzed. Preferable examples of the vinyl chloride copolymer include copolymers containing vinyl chloride and vinyl acetate. I; Phenoxy resin can also be used. Phenoxy resin has advantages such as high mechanical strength, excellent dimensional stability, good heat resistance, water resistance, chemical resistance, and good adhesiveness. These advantages are complementary to those of the polyurethane described above, and the stability of the physical properties of the tape over time can be significantly improved. Furthermore, in addition to the binders described above, mixtures of thermoplastic resins, thermosetting resins, reactive resins, and electron beam curable resins may be used. In order to improve the durability of the magnetic layer of the magnetic tape of the present invention, the magnetic paint can contain various curing agents, such as incyanate. Examples of aromatic incyanates include tolylene diisocyanate (TD) and adducts of these incyanates with active hydrogen compounds, and those having an average molecular weight of 100 to 3,000 are suitable. Examples of aliphatic incyanates include hexamethylene diisocyanate (HMDI) 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 incynates, non-alicyclic incynates and adducts of these compounds with active hydrogen compounds are preferred. A dispersant is used in the magnetic paint used to form the magnetic layer, and additives such as a lubricant, an abrasive, a matting agent, an antistatic agent, etc. may be included as necessary. In addition to the phosphoric acid ester according to the present invention, dispersants used in the present invention include aminated metals, alkyl sulfates, fatty acid amides, higher alcohols, polyethylene oxides,
Examples include sulfosuccinic acid, sulfosuccinic acid esters, known surfactants, and salts thereof, and salts of polymer dispersants having a negative organic group (for example, -Cool) can also be used. These dispersants may be used alone or in combination of two or more. In addition, as lubricants, silicone oil, gelaphalite, carbon black graft polymer, molybdenum disulfide, tungsten disulfide, lauric acid, myristic acid, carbon atoms 12 to 1
Fatty acid esters (so-called waxes) consisting of 6 monobasic fatty acids and monohydric alcohols having 21 to 23 carbon atoms in total can also be used. These lubricants are used in amounts of 0.2 to 20 parts by weight per 100 parts by weight of the binder.
It is added in a range of parts by weight. As the abrasive, commonly used materials such as fused alumina, silicon carbide, chromium oxide, corundum, artificial corundum, artificial diamond, garnet, and emery (main components: corundum and magnetite) are used. These abrasives have an average particle size of 0.05 to 5 μm,
Particularly preferably, it is 0.1 to 2 μm. These abrasives are added in an amount of 1 to 20 parts by weight based on 100 parts by weight of the binder. As the matting agent, organic powder or inorganic powder may be used individually or in combination. As the organic powder used in the present invention, acrylic styrene resin, benzoguanamine resin powder, melamine resin powder, and phthalocyanine pigment are preferable, but polyolefin resin powder, polyester resin powder, polyamide resin powder, and polyimide resin are preferred. Powder, polyfluoroethylene resin powder, etc. can also be used, and inorganic powders include silicon oxide, titanium oxide, aluminum oxide, calcium carbonate,
barium sulfate, zinc oxide, tin oxide, aluminum oxide,
Chromium oxide, silicon carbide, calcium carbide, α-Fe20
3. Talc, kaolin, calcium sulfate, boron nitride, zinc fluoride, and molybdenum dioxide. Antistatic agents include carbon black, graphite, conductive powders such as tin oxide-antimony oxide compounds, titanium oxide-tin oxide-antimony oxide compounds; natural surfactants such as saponin; alkylene oxides, and glycerin. Nonionic surfactants such as glycidol-based, glycidol-based, etc. Cationic surfactants such as higher alkylamines, quaternary ammonium salts, pyridine, other heterocycles, phosphonium or sulfonium: Carboxylic acid, sulfonic acid, phosphoric acid, sulfuric acid anionic surfactant diamino acids containing acidic groups such as ester groups and phosphate ester groups;
Examples include amphoteric activators such as aminosulfonic acids, sulfuric acid or phosphoric acid esters of amino alcohols, and the like. Solvents to be added to the above paint or diluting solvents during application of this paint include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as methanol, ethanol, propatool, and butanol; methyl acetate; ethyl acetate, butyl acetate,
Esters such as ethyl lactate and ethylene glycol monoacetate; Ethers such as glycol dimethyl ether, glycol monoethyl ether, dioxane, and tetrahydrofuran; Aromatic hydrocarbons such as benzene, toluene, and xylene; Methylene chloride, ethylene chloride, carbon tetrachloride, Halogenated hydrocarbons such as chloroform and dichlorobenzene can be used. In addition, as a support, polyethylene terephthalate,
Examples include polyesters such as polyethylene-2,6-naphthalate, polyolefins such as polypropylene, cellulose derivatives such as cellulose triacetate and cellulose diacetate, plastics such as polyamide and polycarbonate, metals such as Cu, IMI, and Zn, and glass. , boron nitride BN, and ceramics such as Si carbide can also be used. The thickness of these supports is approximately 3 to 100 μm in the case of a film or sheet, preferably 5 to 50 μm.
In the case of a disk or card, the thickness is about 30 μm to 10 mm, and in the case of a drum, it is used in a cylindrical shape, and the shape is determined depending on the recorder used. An intermediate layer for improving adhesion may be provided between the support and the magnetic layer. Coating methods for forming the magnetic layer on the support include air knife coating, blade coating, air knife coating, squeeze coating, impregnation coating, reverse roll coating, trans7 roll coating, gravure coating, kiss coating, and cast coating. , spray coat, etc. can be used, but are not limited to these. [Example] The present invention will be specifically explained using Examples. Example 1.2 and Comparative Examples (1) and (2') Magnetic tape 11efF@Let! according to the magnetic paint formulation of Cloth-1 below!
1”6””vf: °,・pa,hereinafter gold seal '1.2゛2,
・′: Magnetic paint formulation: The above formulation was mixed and dispersed, diluted with additives, applied, dried, and subjected to supercalender treatment. Calendar conditions: Example 1 and Comparative Example (1), 60°C, 100kg/cm
Comparative Example (2) - 80°C, 300kg/am Characteristic measurement results are shown in Table 2. As shown in Table 2, Example Sample 1 was comparable to Comparative Examples (1) and (2) in terms of electromagnetic conversion characteristics, and had a lower efficiency in the calendering process. Both can save 15%. Applicant Konishiroku Photo Industry Co., Ltd.
Claims (1)
磁性層の密度が1.7〜2.0g/cm^3であり、ま
た前記磁性層側表面の表面粗さが0.015μm以下で
あることを特徴とする磁気記録媒体。In a magnetic recording medium having a magnetic layer on a non-magnetic support,
A magnetic recording medium characterized in that the density of the magnetic layer is 1.7 to 2.0 g/cm^3, and the surface roughness of the surface on the side of the magnetic layer is 0.015 μm or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26320787A JPH01106318A (en) | 1987-10-19 | 1987-10-19 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26320787A JPH01106318A (en) | 1987-10-19 | 1987-10-19 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01106318A true JPH01106318A (en) | 1989-04-24 |
Family
ID=17386269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26320787A Pending JPH01106318A (en) | 1987-10-19 | 1987-10-19 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01106318A (en) |
-
1987
- 1987-10-19 JP JP26320787A patent/JPH01106318A/en active Pending
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