WO2005101407A1 - リーダーテープおよびこれを用いた磁気テープカートリッジ - Google Patents
リーダーテープおよびこれを用いた磁気テープカートリッジ Download PDFInfo
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- WO2005101407A1 WO2005101407A1 PCT/JP2005/007140 JP2005007140W WO2005101407A1 WO 2005101407 A1 WO2005101407 A1 WO 2005101407A1 JP 2005007140 W JP2005007140 W JP 2005007140W WO 2005101407 A1 WO2005101407 A1 WO 2005101407A1
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- 238000005260 corrosion Methods 0.000 description 1
- 150000001913 cyanates Chemical class 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- JRTVEUGOGWTHTR-UHFFFAOYSA-N dodecyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCCCCCCCCCCC JRTVEUGOGWTHTR-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- TZMQHOJDDMFGQX-UHFFFAOYSA-N hexane-1,1,1-triol Chemical compound CCCCCC(O)(O)O TZMQHOJDDMFGQX-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XMNVMZIXNKZAJB-UHFFFAOYSA-N iron(3+);lead(2+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Fe+3].[Fe+3].[Pb+2].[Pb+2] XMNVMZIXNKZAJB-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 150000003903 lactic acid esters Chemical class 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000001883 metal evaporation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229940105132 myristate Drugs 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- JTHNLKXLWOXOQK-UHFFFAOYSA-N n-propyl vinyl ketone Natural products CCCC(=O)C=C JTHNLKXLWOXOQK-UHFFFAOYSA-N 0.000 description 1
- 125000004957 naphthylene group Chemical group 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- BARWIPMJPCRCTP-UHFFFAOYSA-N oleic acid oleyl ester Natural products CCCCCCCCC=CCCCCCCCCOC(=O)CCCCCCCC=CCCCCCCCC BARWIPMJPCRCTP-UHFFFAOYSA-N 0.000 description 1
- BARWIPMJPCRCTP-CLFAGFIQSA-N oleyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCCOC(=O)CCCCCCC\C=C/CCCCCCCC BARWIPMJPCRCTP-CLFAGFIQSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920002577 polybenzoxazole Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 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
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- GKAVWWCJCPVMNR-UHFFFAOYSA-N tridecyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCCCCCCCCCCCC GKAVWWCJCPVMNR-UHFFFAOYSA-N 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/04—Magazines; Cassettes for webs or filaments
- G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
- G11B23/107—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using one reel or core, one end of the record carrier coming out of the magazine or cassette
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/037—Single reels or spools
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/20—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture with provision for splicing to provide permanent or temporary connections
- G11B23/26—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture with provision for splicing to provide permanent or temporary connections of leaders for loading or threading, e.g. to form a temporary connection
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/627—Record carriers characterised by the selection of the material of leaders for magnetic tapes, e.g. non-magnetic strips on the tapes or for connection
Definitions
- the present invention relates to a leader tape and a magnetic tape cartridge that rotatably accommodates a reel around which a leader tape and a magnetic tape to which the leader tape is joined are wound in a cartridge case.
- a magnetic tape cartridge used as a recording medium used in an external storage device such as a computer has a magnetic tape wound on one or more reels, and the reel can be rotated in a cartridge case.
- a type housed in a container There is known a type housed in a container. This magnetic tape is used for data storage in computers, etc., and stores important information, so that troubles such as tape jamming do not occur and the magnetic tape cannot be accidentally ejected. ! /, Is configured as follows.
- a leader member such as a leader pin or a leader block is fixed to the end of the magnetic tape to pull out the magnetic tape, or a relatively hard plastic is used.
- a leader tape having an engagement hole is joined to the leading end of the tape made of the material, and the leader member or the leading end of the leader tape is held by the holding member on the recording / reproducing apparatus side and pulled out to load the magnetic tape.
- the drive device is configured to perform the entanglement.
- the leader block is accommodated in a concave portion provided in the core portion of the take-up reel, and in that state, a part thereof forms a part of an arc surface of the core portion. It is configured as follows.
- the leader block 40 fits into a concave portion 42 provided along the radial direction of the core portion 41.
- the end surface 40a of the block 40 constitutes a part of the winding surface of the core 41!
- the end surface 40a of the leader block 40 is formed in an arc shape corresponding to the outer peripheral surface of the core portion 41, as shown in FIG.
- the core portion 41 may be protruded, causing an unacceptable level difference on the winding surface of the core portion 41.
- Such a step causes a fold or deformation in the leader tape LT, and as shown in FIG. 4 (c), the fold or deformation is a portion of the magnetic tape MT which is substantially a recording area wound around the next layer and thereafter. This also occurs (so-called tape reflection occurs).
- Such a tape image causes inconveniences such as not being able to maintain an appropriate distance from a recording / reproducing head in the process of recording or reproducing information, and immediately causes recording failure or information loss.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-110164
- the present invention suppresses an increase in dropout due to reflection of a drive reel or a leader block due to long-term storage or running at a high temperature, and hardly causes edge damage of a magnetic tape. It is an object of the present invention to provide a magnetic tape cartridge using the same.
- a leader tape characterized in that at least one surface has a center line average roughness (Ra) of 10 to 60 nm and a maximum amount of curvature in the longitudinal direction of 3 mmZm or less.
- a magnetic tape cartridge comprising a cartridge case in which a single or a plurality of reels each having a magnetic tape wound thereon are rotatably accommodated, the magnetic tape being joined to the leading end of the magnetic tape and leading the magnetic tape to perform magnetic recording.
- the leader tape of the present invention has a specific surface roughness, and by forming an appropriate gap between the tapes when the tape is wrapped, the pressure is relieved so that the leader block and the like can be attached to the magnetic tape. It can be prevented from being reflected. Also, regulate the maximum amount of bending of the leader tape. With this setting, the magnetic tape can be wound around the take-up reel in a beautiful winding form, and edge damage of the magnetic tape can be prevented.
- FIG. 1 is a configuration diagram conceptually showing a magnetic recording / reproducing apparatus according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view showing a magnetic tape cartridge used in the magnetic recording / reproducing apparatus.
- FIG. 3 (a) is a perspective view showing a drive reel similarly used in the magnetic recording / reproducing apparatus
- FIG. 3 (b) is an enlarged sectional view taken along the line bb of FIG. 3 (a).
- FIG. 5 is a view for explaining the maximum amount of bending in the longitudinal direction of the leader tape according to the present invention.
- the center line average roughness (Ra) of at least one surface of the leader tape of the present invention is 10 to 60 nm.
- the Ra means a value measured by a light interference type surface roughness meter (HD-2000 manufactured by WYKO) under the following conditions.
- Objective lens 50x
- Intermediate lens 0.5x
- Measuring range 242m x 184m
- cylinder correction Ra correction after tilt correction.
- the leader tape of the present invention is preferably used in a magnetic recording / reproducing apparatus having a linear recording density of 100 kfci or more and a difference between the recording track width and the reproduction track width of ⁇ to 16 ⁇ m.
- the recording track width is sufficiently large compared to the reproduction track width, so that a few track deviations occur due to tape deformation.
- the head runs on the recording track, it does not increase dropout.
- the magnetic recording / reproducing apparatus is not particularly limited as long as it is constituted by a magnetic tape cartridge and a magnetic tape drive.
- This magnetic tape cartridge is not particularly limited as long as it contains a single or a plurality of reels rotatably accommodating a magnetic tape formed by connecting the leader tape of the present invention to the cartridge case.
- the present invention has a remarkable effect in the case of a single reel.
- the leader tape of the present invention can be joined by attaching a known splicing tape in a state where one end of the leader tape is abutted against the tip of the magnetic tape on which signals are recorded and reproduced.
- the other end of the leader tape is provided with an engaging member such as a leader pin. This is used for fixing the magnetic recording / reproducing device to a drive reel.
- a magnetic tape cartridge provided with the leader tape of the present invention may be used for a magnetic recording and reproducing apparatus.
- Recording and reproduction are possible with a difference between the track width and the playback track width (preferably 15 ⁇ m or less, more preferably 10 ⁇ m or less) of 0 to 16 m (preferably 0 to 12 ⁇ m, more preferably 0 to 8 ⁇ m). It is.
- the recording / reproducing apparatus for performing recording / reproducing with the above track width is not particularly limited, and a magnetic recording / reproducing apparatus having a recording / reproducing head in a known mode can be used.
- the magnetic head used in the present invention is preferably an inductive head for recording and an MR head for reproduction.
- the material of the leader tape it is preferable to use a plastic having high elasticity such as polyethylene terephthalate, polyethylene naphthalate, polybutylene phthalate, and polyimide.
- a plastic having high elasticity such as polyethylene terephthalate, polyethylene naphthalate, polybutylene phthalate, and polyimide.
- the material itself is formed into a tape shape.
- a so-called support may be used, but for the purpose of reducing damage to the head, it is preferable that the support is used as a support and at least one surface is provided with a coating layer containing a powder and a binder.
- the coating layer provided on the support a layer in which fine-particle inorganic powder is dispersed with a binder is mainly used.
- the fine inorganic powder may be a non-magnetic substance or a magnetic particle.
- the coating layer is composed of a single layer or a plurality of layers. The coating layer is formed on at least one of the surface in contact with the magnetic head and the opposite side.
- the purpose of providing the coating layer is to provide a function not provided by the support as necessary.
- conductive particles which have a cleaning effect by containing abrasive particles on the surface in contact with the magnetic head are provided. Includes antistatic function, contains magnetic material and magnetic Recording a signal.
- a back coat (knock layer) mainly composed of carbon black is provided on the contact side and on the opposite side.
- the total thickness of the leader tape is more preferably 8 to 18 ⁇ m, preferably 5 to 20 ⁇ m.
- the thickness of the coating layer is preferably from 0.1 to 5.0 O / z m, more preferably from 0.5 to 3.0 m, as a single layer or a total of a plurality of layers.
- the thickness of the support is preferably 3 to 17111, more preferably 6 to 15 m.
- the center line average surface roughness Ra of at least one surface of the leader tape is 10 to 60 nm, preferably 20 to 50 nm, and more preferably 30 to 40 nm.
- the surface roughness Ra of the leader tape may be the same on both sides or may be different. Surface roughness can be controlled in various ways. When using a coating layer, for example, select the roughness of the support, the thickness of the coating layer, the particle size of the inorganic particles used for the coating layer, the linear pressure of surface forming treatment such as calendering, the roll surface properties, etc. Is mentioned.
- the roughness of the support is set to 5 to 80 nm, preferably 10 to 65 nm.
- the average particle size of the inorganic powder used in the coating layer should be 0.02 to 1 ⁇ m, preferably 0.05 to 0.6 ⁇ m.
- As the shape a granular shape, a needle shape, a flat plate shape, a dice shape, or the like can be used.
- the maximum amount of bending in the longitudinal direction of the leader tape is 3 mmZm or less, preferably 2 mmZm or less, and more preferably ImmZm or less.
- load / unload is mainly performed.
- edges of the magnetic tape are less susceptible to damage, and the durability in repetition can be improved.
- Means for adjusting the amount of bending include adjusting the shape of the base material during slitting and the shape of the material of the coated product, the base material force, and the tension (for example, 10 to 200 NZm) when pulling out the leader tape.
- the maximum bending amount in the present invention is the maximum bending amount in the longitudinal direction of the leader tape having a length of lm, and specifically, as shown in FIG. Put the LT on a flat surface in a tension-free condition and connect both ends 52 and 53
- the maximum bending portion 55 in the longitudinal direction of the leader tape LT is determined with respect to the solid line 54, and the distance L (mm) between the bending portion 55 and the broken line 54 is defined as the maximum bending amount.
- the sign that the maximum bending amount is 3 mmZm or less is synonymous with the range of 3 to +3 mmZm.
- the surface electric resistance of the leader tape is more preferably 10 1Q QZsq is preferably less tool 10 9 QZsq hereinafter.
- the leader tape is prevented from being charged, so that it is not damaged by static electricity of the magnetic head, the reliability is improved, and the magnetic tape cartridge obtained by joining the leader tape, which is basically stronger than the magnetic tape, is obtained. Load to magnetic recording / reproducing device Durability against repeated Z unloading operation is improved.
- a method of adding a conductive powder such as carbon black to at least one of a lower layer, an upper layer and a back layer may be mentioned. For example, 1 to 20 parts by mass of carbon black is added to 100 parts by mass of the binder in each layer.
- the leader tape has a magnetic layer in which a lower layer is a non-magnetic layer containing an inorganic powder and a binder, an upper layer is a magnetic layer containing a ferromagnetic powder and a binder, and a back layer is formed on the opposite side of the magnetic layer. Tape is preferred.
- the magnetic tape is a leader tape
- thermoplastic resins those having a glass transition temperature of 100 to 150 ° C., a number average molecular weight of 1,000 to 200,000, preferably 10,000 to 100,000, and a polymerization degree of about 50 to about LOOO are used.
- Examples of such a compound include butyl chloride, butyl acetate, butyl alcohol, maleic acid, acrylic acid, acrylic acid ester, salted biylidene, acrylonitrile, methacrylic acid, and metathallic acid.
- Thermosetting resins or reactive resins include phenol resin, epoxy resin, polyurethane curing resin, urea resin, melamine resin, alkyd resin, acrylic reactive resin, and formaldehyde resin.
- These resins are described in detail in the Plastic Handbook published by Asakura Shoten.
- a known electron beam-curable resin can be used for each layer. These examples and the production method thereof are described in detail in JP-A-62-256219.
- vinyl chloride resin vinyl chloride vinyl chloride copolymer, vinyl chloride vinyl chloride acetate, and vinyl chloride vinyl chloride acetate are preferred.
- examples thereof include a combination of at least one selected from an alcohol copolymer and a vinyl chloride-vinyl acetate-maleic anhydride copolymer with a polyurethane resin and a polyisocyanate.
- polyurethane resin known materials such as polyester polyurethane, polyether polyurethane, polyether polyester polyurethane, polycarbonate polyurethane, polyester polycarbonate polyurethane, and polyprolatetatone polyurethane can be used.
- polar groups be introduced by copolymerization or addition reaction.
- the amount of such a polar group is 10 1 to 10 mol Zg, preferably 10- 2 to 10 moles Zg.
- the content of hydroxyl groups in the polyurethane resin is preferably from 3 to 20 per molecule, more preferably from 4 to 5 per molecule. If the number is less than 3 per molecule, the reactivity with the polyisocyanate curing agent decreases, so that the coating film strength and durability tend to decrease. Ma If the number is more than 20, the solubility and dispersibility in a solvent are likely to be reduced.
- a compound having three or more hydroxyl groups can be used in the synthesis of the polyurethane resin.
- trimethylolethane, trimethylolpropane, trimellitic anhydride, glycerin, pentaerythritol, hexanetriol, a dibasic acid made from a polyester polyol described in JP-B-6-64726, and this compound are used.
- examples include branched polyesters having three or more hydroxyl groups and polyetheresters obtained as a glycol component. Preference is given to trifunctional ones, and if the functionality is more than four, the reaction becomes more chewy in the reaction process.
- binders used in the present invention include VAGH VYHH VMCH, VAGF VAGD, VROH, VYES VYNC, VMCC, XYHL, XYSG, PKHH, PKHJ, manufactured by Union Carbide.
- PKHC PKFE, Nissin Chemical Industries MPR-TA, MPR-TA5, MPR-TAL, MPR-TSN, MPR-TMF ⁇ MPR-TS, MPR-TM, MPR-TAO, Denki-Dagakusha 1000W, DX80, DX81, DX82, DX83, 100 FD, Zeon Corporation MR-104, MR-105, MR110, MR100, MR555, 400X-110A, said Polyurethane Co., Ltd.
- polyisocyanate examples include tolylene diisocyanate, 4,4, diphenyl-methanediisocyanate (MDI), hexamethylene diisocyanate, xylylene diisocyanate, naphthylene 1,5 diisocyanate, o Isocyanates such as tonolaidin diisocyanate, isophorone diisocyanate, and triphenylmethane triisocyanate; products of these isocyanates and polyalcohols; and polyisomers formed by condensation of isocyanates. Cyanates and the like can be used.
- the binder used in the magnetic layer is based on the ferromagnetic powder, and the binder used in the non-magnetic layer is usually in the range of 5 to 50% by mass, preferably 10 to 30% by mass, based on the nonmagnetic inorganic powder. It is used in the range of mass%. 5 to 30 mass% in the case of using a Shioi ⁇ Bi sulfonyl system ⁇ , 2-20 mass 0/0 in the case of using a poly urethane ⁇ , polyisobutylene Xia nate range of 2 to 20 weight 0/0 It is preferable to use these in combination. For example, when head corrosion occurs due to a small amount of dechlorination, it is also possible to use only polyurethane and isocyanate.
- the amount of the binder, the amount of the salt-based vinyl resin, the urethane resin, the polyisocyanate, or the other resin occupied in the binder, the amount of the magnetic layer It is of course possible to change the molecular weight and polar group amount of each resin forming the resin or the above-mentioned physical properties of the resin between the non-magnetic layer and each magnetic layer, if necessary.
- a known technique for the multilayer magnetic layer can be applied.
- the amount of binder in each layer when changing the amount of binder in each layer, it is effective to increase the amount of binder in the magnetic layer in order to reduce scratches on the surface of the magnetic layer, and to improve the head touch to the head, it is effective to increase the amount of binder in the non-magnetic layer.
- a ferromagnetic alloy powder containing a Fe as a main component is preferable.
- These ferromagnetic powders include Al, Si, S, Sc, Ca, Ti, V, Cr, Cu, Y, Mo, Rh, Pd, Ag, Sn, Sb, Te, Ba, Ta , W, Re, Au, Hg, Pb, Bi ⁇ La, Ce, Pr, Nd, P, Co, Mn, Zn, Ni, Sr, B, and the like.
- the ferromagnetic alloy fine powder may contain a small amount of a hydroxide or an oxide.
- a ferromagnetic alloy fine powder obtained by a known production method can be used, and the following method can be used.
- a method of reducing a complex organic acid salt (mainly oxalate) with a reducing gas such as hydrogen a method of reducing iron oxide with a reducing gas such as hydrogen to obtain Fe or Fe—Co particles, a metal Thermal decomposition of carbonyl compounds, reduction by adding a reducing agent such as sodium borohydride, hypophosphite or hydrazine to an aqueous solution of a ferromagnetic metal, metal evaporation in a low-pressure inert gas To obtain fine powder.
- a reducing agent such as sodium borohydride, hypophosphite or hydrazine
- the ferromagnetic alloy powder thus obtained is subjected to a well-known oxidizing treatment, Immersion in organic solvent and drying, immersion in organic solvent, sending oxygen-containing gas to form an oxidized film on the surface and drying, inert with oxygen gas without using organic solvent Any method in which the partial pressure of the gas is adjusted to form an oxide film on the surface can be used.
- ferromagnetic powder used in the magnetic layer a hexagonal fine powder may also be used.
- hexagonal ferrite there are barium ferrite, strontium ferrite, lead ferrite, calcium ferrite, and their substituted bodies, for example, Co substituted bodies.
- Specific examples include magnetoplumbite-type barium ferrite and strontium ferrite, spinel-coated magnetoplanoite-type ferrite whose particle surface is covered, and magneto-planite-type norium ferrite and strontium ferrite partially containing a spinel phase.
- Al, Si ⁇ S, Sc, Ti, V, Cr, Cu, Y, Mo, Rh, Pd, Ag, Sn, Sb, Te, Ba ⁇ Ta ⁇ W Re ⁇ Au ⁇ Hg ⁇ It may contain atoms such as Pb ⁇ Bi, La, Ce ⁇ Pr ⁇ Nd ⁇ P ⁇ Co, Mn, Zn, Ni, Sr ⁇ B, Ge, and Nb.
- use products containing elements such as Co-Ti, Co-Ti-Zr, Co-Ti-Zn, Ni-Ti-Zn, Nb-Zn-Co, Sb-Zn-Co, and Nb-Zn. can do.
- the inorganic powder used for the non-magnetic layer is a non-magnetic powder, for example, an inorganic compound powder such as a metal oxide, a metal carbonate, a metal sulfate, a metal nitride, a metal carbide, and a metal sulfide. You can choose.
- an inorganic compound powder such as a metal oxide, a metal carbonate, a metal sulfate, a metal nitride, a metal carbide, and a metal sulfide.
- You can choose.
- By mixing carbon black in the non-magnetic layer it is possible to lower the surface electric resistance Rs, which is a known effect, to reduce the light transmittance, and to obtain a desired micro-Vickers hardness.
- Including carbon black in the lower layer can also have the effect of storing lubricant.
- As the type of carbon black furnace for rubber, thermal for rubber, black for color, acetylene black, and the like can be
- an organic powder can be added to the non-magnetic layer according to the purpose.
- Known techniques regarding the magnetic layer can be applied to the lubricant, dispersant, additive, solvent, dispersing method, etc. of the non-magnetic layer.
- additives used in the magnetic layer, the nonmagnetic layer, etc. those having a head polishing effect, a lubricating effect, an antistatic effect, a dispersing effect, a plasticizing effect and the like are used. Specific examples include those described in W098 Z35345 and the like.
- Lubricants include, for example, monobasic fatty acids having 10 to 24 carbon atoms, and metal salts thereof (Li, Na, K, Cu, etc.) or monobasic fatty acids having 10 to 24 carbon atoms and 2 to 12 carbon atoms.
- Esters and fatty acid amides having 8 to 22 carbon atoms can be used.
- the fatty acids and alcohols may contain an unsaturated bond or may be branched.
- fatty acids include, but are not limited to, fatty acids such as power-pric acid, power prillic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, and isostearic acid.
- Esters include butyl stearate, otachinorestearate, aminorestearate, isooctyl stearate, butinoremyristate, otatyl myristate, butoxyshethyl stearate, butoxy getyl stearate, and 2-ethylhexyl.
- the knock layer preferably contains carbon black and inorganic powder.
- the formulation of the magnetic layer or the non-magnetic layer is applied.
- the thickness of the back layer is preferably 0.1 to 1.0 111, more preferably 0.4 to 0.6 111, and more preferably 1, 0.
- the support used for the magnetic tape is preferably a nonmagnetic flexible support, such as polyesters such as polyethylene terephthalate and polyethylene naphthalate, polyolefins, cellulose triacetate, polycarbonate, aromatic and aliphatic polyamides. , Polyimide, polyamideimide, polysulfone, polyaramid, polybenzoxazole, etc.
- Known films can be used. Among them, it is preferable to use a polyethylene terephthalate film or a polyimide film.
- These supports may be subjected to corona discharge treatment, plasma treatment, easy adhesion treatment, heat treatment, dust removal treatment and the like in advance.
- the support has a modulus of elasticity in the longitudinal direction of 3.5 to 20 GPa, preferably 6.2 GPa or less, and a modulus of elasticity in the width direction of 3.5 to 20 GPa, preferably 5.7 GPa or less.
- the elastic modulus in the width direction is 4 to 15 GPa, preferably 5.4 GPa or less.
- the magnetic layer and the non-magnetic layer can be prepared by dissolving or dispersing the above-mentioned components in a solvent to prepare respective coatings, and then applying them on a support (web) in order.
- the wet-on-wet method in which the magnetic layer is applied while the non-magnetic layer is in a wet state, or the wet-on-dry method in which the non-magnetic layer is applied after being dried.
- the coated and dried web is appropriately subjected to an orientation treatment, a calendar treatment, and a slit.
- a magnetic tape for data recording is used in which a magnetic layer is provided on a non-magnetic support and a back coat is provided as necessary.
- a non-magnetic lower layer and a magnetic upper layer are coated on a 2-9 / ⁇ support, and a back coat is provided on the opposite surface.
- the components of the magnetic tape are suitable for high-density recording, and the magnetic tapes described in JP-A-2001-250219 and JP-A-2002-251710 are preferred examples.
- the magnetic tape cartridge of the present invention comprises a cartridge case in which one or a plurality of reels each having a magnetic tape wound thereon are rotatably housed, and are joined to the leading end of the magnetic tape.
- the present invention is characterized in that the leader tape of the present invention is used as a leader tape drawn out to a playback device.
- the leader tape of the present invention has a particularly remarkable effect when used in a magnetic recording / reproducing apparatus having a linear recording density of lOOkfci or more and a difference between a recording track width and a reproduction track width of less than or equal to the recording track width. In a magnetic recording / reproducing apparatus having a width difference of 10 m or less, more remarkable effects can be obtained.
- the thickness of the leader tape is preferably at most 5 times, preferably at most 3 times, more preferably at most 2 times the thickness of the magnetic tape.
- the length of the leader tape is equal to or greater than the length obtained by adding at least the length of the drive reel in the magnetic recording / reproducing device to the three reels and the opening force of the cartridge case plus the length of the traveling path leading to the drive reel. Hope there is.
- FIG. 1 is a configuration diagram conceptually showing a magnetic recording / reproducing apparatus according to an embodiment of the present invention
- FIG. FIG. 3 (a) is a perspective view showing a drive reel (winding reel) also used in the magnetic recording / reproducing apparatus
- FIG. 3 (b) is an enlarged view of a portion bb in FIG. 3 (a).
- a magnetic tape cartridge in which a tape-shaped recording medium is wound on one cartridge reel (delivery reel) and a magnetic tape drive (tape drive) in which the magnetic tape cartridge is loaded are described.
- the recording / playback apparatus will be described.
- the magnetic recording / reproducing apparatus 1 includes a magnetic tape cartridge 10 and a magnetic tape drive 20.
- a magnetic recording / reproducing apparatus 1 winds a magnetic tape MT as a magnetic tape wound around a magnetic tape cartridge 10 on a drive reel 21 of a magnetic tape drive 20 as a receiving side, or on a drive reel 21. While rewinding the wound magnetic tape MT toward the cartridge reel (sending reel) 11, information is recorded on the magnetic tape MT or information recorded on the magnetic tape MT is reproduced.
- the magnetic tape cartridge 10 conforms to the LTO standard, and has a cartridge case 2 divided into a lower half 2B and an upper half 2A. Then, inside this cartridge case 2, a single cartridge reel 11 on which a magnetic tape MT is wound in advance, a reel lock 4 for keeping the rotation of the cartridge reel 11 locked, a compression coil spring 5, and a cartridge.
- a slide door 2D that opens and closes a magnetic tape outlet 2C formed on one side of the cartridge case 2 across the release node 6, the lower half 2B, and the upper half 2A for releasing the locked state of the reel 11.
- Door 2D It is composed of a torsion coil spring 7 for urging the tape outlet 2C to the closed position, an erroneous erasure preventing claw 8, a leader pin storage part 9 formed near the magnetic tape outlet 2C, and the like. Then, a leader tape LT is joined to the tip of the magnetic tape MT.
- the magnetic tape MT shown in FIG. 2 represents the leader tape LT.
- such a magnetic tape cartridge 10 is loaded into a magnetic tape drive 20, a leader tape LT is pulled out by a leader block 31 described later, and a drive reel 21 of the magnetic tape drive 20 is provided.
- the leader block 31 is fitted into a concave portion 23 provided in the core portion 22 of FIG.
- the leader tape LT of the magnetic tape cartridge 10 can be wound around the core 22 of the drive reel 21.
- leader tape LT and the magnetic tape MT used for the magnetic tape cartridge 10 of the present embodiment will be described in detail.
- the leader tape LT is formed to be long, and in the present embodiment, has a length that can be wound around the core part 22 of the drive reel 21 of the magnetic tape drive 20 by at least three turns. .
- Om, preferably 0.9 m is used as the leader tape LT.
- the magnetic tape drive 20 includes a spindle 24, a spindle driving device 25 for driving the spindle 24, a magnetic head H, a drive reel 21, and a drive reel 21 for driving the drive reel 21. And a control device 27.
- the magnetic tape drive 20 has a leader block 31 which can be engaged with a leader pin 30 (see FIG. 2) provided at the leading end of the leader tape LT of the magnetic tape cartridge 10. It is transported to the magnetic tape cartridge 10 side by a drawing mechanism (not shown) including the guide 32 and the like.
- the spindle drive device 25 and the take-up reel drive device 26 rotate the spindle 24 and the drive reel 21 to rotate the magnetic tape MT. Is transported.
- the drive reel 21 is mounted on the upper surface of the lower flange portion 21a. Radial grooves 21b are formed at intervals. Such a groove 21b functions as a discharge path for discharging air entrained when the magnetic tape MT is wound on the drive reel 21.
- the pull-out guide 32 pulls out the leader pin 30 and transports it to the drive reel 21 via the magnetic head ⁇ .
- the block 31 is fitted into the concave portion 23 of the core portion 22 of the drive reel 21.
- the recess 23 is provided with a not-shown engaging portion that engages with the leader block 31 and prevents the leader block 31 from jumping out of the recess 23.
- the spindle drive device 25 and the take-up reel drive device 26 are driven under the control of the control device 27 so that the leader tape LT and the magnetic tape MT are transported from the cartridge reel 11 to the drive reel 21. Then, the spindle 24 and the drive reel 21 are rotated in the same direction. As a result, the leader tape LT is wound on the drive reel 21, and thereafter, while the magnetic tape MT is wound on the drive reel 21, information is recorded on the magnetic tape MT by the magnetic head ⁇ or the magnetic tape MT is wound on the magnetic tape MT. The recorded information is reproduced.
- the spindle 24 and the drive reel 21 are driven to rotate in the opposite direction, so that the magnetic tape MT is transferred to the cartridge reel 11. Is done.
- the recording of information on the magnetic tape MT or the reproduction of the information recorded on the magnetic tape MT are performed by the magnetic head ⁇ .
- the magnetic tape MT is usually wound around the magnetic tape cartridge 10 in many cases.
- the magnetic recording / reproducing apparatus 1 according to the present embodiment is particularly useful for preventing tape reflection in such a usage mode. It is. That is, when the magnetic tape MT is wound from the magnetic tape cartridge 10 to the drive reel 21 of the magnetic tape drive 20, the magnetic tape MT is pulled out from the magnetic tape cartridge 10. The force that causes the lock block 31 to fit into the core portion 22 of the drive reel 21 Depending on the dimensional accuracy of the leader block 31, the leader block 31 may protrude from the end face of the core portion 22 (step). . In such a case, when the conventional leader tape is wound around the drive reel 21, the step is reflected on the magnetic tape MT, and there is a possibility that the recording of the magnetic tape MT becomes impossible or information is lost.
- the step can be well absorbed by the leader tape LT, the linear recording density is equal to or more than 100 kfci, and the recording track width and the reproducing track width are used. Even if the magnetic recording / reproducing apparatus 1 having a differential force of ⁇ to 16 ⁇ m is used, it is possible to obtain an excellent advantage that it is possible to prevent a recording failure or loss of information on the magnetic tape MT.
- Epoxy group (3.5 mass 0/0 in monomer units)
- Carbon black (Mitsubishi Carbon Corporation) 10 parts
- Each of the above-mentioned upper layer paint and lower layer paint was kneaded continuously and in a kneader, and then dispersed using a sand mill.
- a polyisocyanate (Coronate L, manufactured by Nippon Polyurethane Co., Ltd.) was added, and 40 parts of methyl ethyl ketone was added to each dispersion.
- the mixture was filtered using a filter having an average pore diameter of 1 m, and filtered. Paint and lower layer paint were prepared.
- the above-mentioned components forming the back layer were kneaded continuously and in a kneader, and then dispersed using a sand mill. After adding 40 parts of polyisocyanate (Coronate L manufactured by Nippon Polyurethane Co.) and 1000 parts of methyl ethyl ketone to the resulting dispersion, the mixture was filtered through a filter having an average pore diameter of 1 ⁇ m. , A paint for a back layer was prepared.
- polyisocyanate Core L manufactured by Nippon Polyurethane Co.
- the obtained upper layer paint and lower layer paint were applied to a long polyethylene terephthalate (PET) support (thickness: 14. O m, Young's modulus in the length (MD) direction: 500 kgZmm 2 (4.9 GPa)). , Young's modulus of width (TD) method: 500KgZmm 2 (4.9GPa), center line average surface roughness Ra (cutoff value: 0.25mm): 38nm on upper coating side, Ra: 36nm on back layer side
- the upper layer and the lower layer were coated simultaneously so that the thickness after drying was 0.8 m and 1.8 m, respectively.
- orientation treatment was performed using a cobalt magnet having a magnetic force of 300 mT and a solenoid having a magnetic force of 150 mT. Then, it was dried to form an upper layer.
- the above-mentioned coating material for the back layer was applied on the other side of the support (the side opposite to the upper layer) so that the thickness after drying was 0.5 / zm, and dried to form a back layer.
- a roll for a leader tape was obtained in which an upper layer was provided on one side of the support and a back layer was provided on the other side.
- the web was subjected to a heat treatment by applying a tension of 1.5 kg / m (14.7 NZm) and running in a heat treatment zone at a temperature of 110 ° C for 5 seconds.
- the roll after the heat treatment is a 7-stage calendering machine composed of a heated metal roll and a flexible roll having a thermosetting resin coated on a core metal (temperature: 90 ° C, linear pressure: 300 kg / cm). ( 294kNZm)), and calendered, and wound with a tension of 5KgZm (49NZm).
- the obtained roll was heat-treated at 50 ° C for 48 hours. Next, the roll was slit into a 1Z2 inch width, and then passed through a solenoid having a magnetic flux density of 300 mT to be demagnetized.
- the maximum amount of curvature of the 1Z2 inch wide tape obtained by slitting is +0.9 mm / m (the upper flange side of the reel is defined as the + side of the curvature, and the curvature to the opposite side is defined as one side).
- a leader tape was selected and connected to a commercially available LTO tape using lm to create a magnetic tape cartridge. The magnetic tape wrapped 580m.
- the magnetic tape cartridge of the present invention was prepared.
- a PET support having a center line average surface roughness Ra of 50 ⁇ m on both sides was used, and a leader tape having a maximum curvature of +2.5 mm / m was selected.
- a magnetic tape cartridge of the present invention was prepared.
- a PET support having a center line average surface roughness Ra of 2 nm on the upper layer side and a center line average surface roughness Ra of 5 nm on the back layer side was used, and the other conditions were the same.
- a magnetic tape cartridge of Example 4 was produced.
- a PET support with a center line average surface roughness Ra of 5 nm on both sides was used, and a leader tape with a maximum curvature of 4.lmm / m was selected.
- a magnetic tape cartridge of Comparative Example 1 was prepared.
- a PET support having a center line average surface roughness Ra of 30 ⁇ m on both sides and a maximum curvature of 3.8 mm / m was selected using a PET support. Otherwise, a magnetic tape cartridge of Comparative Example 2 was prepared in the same manner.
- a leader tape having a center line average surface roughness Ra of 80 ⁇ m on both sides and a maximum curvature of 0.4 mm / m was selected using a PET support, and otherwise the same.
- a magnetic tape cartridge of Comparative Example 3 was produced.
- a magnetic tape cartridge records a signal with a recording track of 10 / ⁇ , a playback track width of 4.5 ⁇ m, and a linear recording density of 150 kfci using an LTO drive, and winds the entire length on a drive reel under a tension of 0.8 N.
- Each drive was stored in an environment of 50 ° C and 80% RH for 12 hours.
- the error rate of the tape start end was measured, and the length of the tape caused by reflection was visually measured.
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/578,409 US20080017741A1 (en) | 2004-04-13 | 2004-04-13 | Leader Tape and Magnetic Tape Cartridge Using the Same |
EP05730425A EP1736988B1 (en) | 2004-04-13 | 2005-04-13 | Magnetic tape cartridge |
DE602005021085T DE602005021085D1 (de) | 2004-04-13 | 2005-04-13 | Magnetbandkassette |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-117816 | 2004-04-13 | ||
JP2004117816A JP2005302168A (ja) | 2004-04-13 | 2004-04-13 | リーダーテープおよびこれを用いた磁気テープカートリッジ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005101407A1 true WO2005101407A1 (ja) | 2005-10-27 |
Family
ID=35150231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/007140 WO2005101407A1 (ja) | 2004-04-13 | 2005-04-13 | リーダーテープおよびこれを用いた磁気テープカートリッジ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080017741A1 (ja) |
EP (1) | EP1736988B1 (ja) |
JP (1) | JP2005302168A (ja) |
DE (1) | DE602005021085D1 (ja) |
WO (1) | WO2005101407A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005302169A (ja) * | 2004-04-13 | 2005-10-27 | Fuji Photo Film Co Ltd | リーダーテープおよびこれを用いた磁気テープカートリッジ |
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JPS6171411A (ja) * | 1984-09-17 | 1986-04-12 | Fuji Photo Film Co Ltd | 磁気テ−プ用リ−ダ−テ−プ |
JPS62259221A (ja) * | 1986-05-06 | 1987-11-11 | Toray Ind Inc | リ−ダ−テ−プ |
JPH01106312A (ja) * | 1987-10-20 | 1989-04-24 | Sony Corp | クリーニングリーダーテープ付き磁気テープ |
JPH06111264A (ja) * | 1992-09-30 | 1994-04-22 | Sony Corp | 磁気テープ用リーダテープ |
JP2000285430A (ja) * | 1999-03-29 | 2000-10-13 | Matsushita Electric Ind Co Ltd | テープカセット |
JP2001110164A (ja) * | 1999-10-12 | 2001-04-20 | Fuji Photo Film Co Ltd | 磁気テープカートリッジ |
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US3533058A (en) * | 1967-07-13 | 1970-10-06 | Ibm | Edge curl control for a flat vacuum head |
US4489124A (en) * | 1981-04-06 | 1984-12-18 | Olympus Optical Co | Process for forming thin film, heat treatment process of thin film sheet, and heat treatment apparatus therefor |
JPH0677135B2 (ja) * | 1986-09-30 | 1994-09-28 | 富士写真フイルム株式会社 | 写真感光材料用包装材料 |
US5045379A (en) * | 1988-06-03 | 1991-09-03 | Diafoil Company, Limited | Polyester film for high density magnetic recording medium |
US6030542A (en) * | 1994-12-27 | 2000-02-29 | Toyo Metallizing Co., Ltd. | Polyester film for leader tapes, and a production process thereof |
JP3464312B2 (ja) * | 1995-05-16 | 2003-11-10 | 富士写真フイルム株式会社 | 磁気テープカセット用リール |
US5958565A (en) * | 1996-04-26 | 1999-09-28 | Fuji Photo Film Co., Ltd. | Magnetic recording tape favorably employable for computer data storage |
WO1999038158A1 (fr) * | 1998-01-21 | 1999-07-29 | Fuji Photo Film Co., Ltd. | Milieu d'enregistrement magnetique |
JP2000057561A (ja) * | 1998-08-07 | 2000-02-25 | Fuji Photo Film Co Ltd | 磁気テープ |
EP1060866A4 (en) * | 1998-10-09 | 2006-04-12 | Teijin Ltd | BIAXIALLY ORIENTED POLYESTER FILM AND SOFT DISK |
CN1321420C (zh) * | 1999-07-09 | 2007-06-13 | 富士胶片株式会社 | 盒式磁带 |
JP3706947B2 (ja) * | 2001-03-12 | 2005-10-19 | 日立マクセル株式会社 | 磁気テープカートリッジ |
JP2004022105A (ja) * | 2002-06-18 | 2004-01-22 | Fuji Photo Film Co Ltd | 磁気記録テープ |
JP2004039064A (ja) * | 2002-07-02 | 2004-02-05 | Hitachi Maxell Ltd | 磁気テープ |
JP2004046928A (ja) * | 2002-07-09 | 2004-02-12 | Sony Corp | 磁気記録媒体 |
JP2004246965A (ja) * | 2003-02-13 | 2004-09-02 | Fuji Photo Film Co Ltd | リーダーテープ及び磁気テープカートリッジ |
JP2004280920A (ja) * | 2003-03-14 | 2004-10-07 | Tdk Corp | 磁気テープの製造方法 |
JP2005222611A (ja) * | 2004-02-05 | 2005-08-18 | Fuji Photo Film Co Ltd | テープドライブシステム |
US20050213247A1 (en) * | 2004-03-25 | 2005-09-29 | Fuji Photo Film Co., Ltd. | Leader tape and magnetic tape cartridge using the same |
US20050214525A1 (en) * | 2004-03-26 | 2005-09-29 | Fuji Photo Film Co., Ltd. | Leader tape and magnetic tape cartridge |
JP2005276387A (ja) * | 2004-03-26 | 2005-10-06 | Fuji Photo Film Co Ltd | リーダーテープおよびこれを用いた磁気テープカートリッジ |
JP2005276386A (ja) * | 2004-03-26 | 2005-10-06 | Fuji Photo Film Co Ltd | リーダーテープ、磁気テープカートリッジ、並びに磁気記録再生方法 |
JP2005276385A (ja) * | 2004-03-26 | 2005-10-06 | Fuji Photo Film Co Ltd | リーダーテープおよびこれを用いた磁気テープカートリッジ |
JP2005317182A (ja) * | 2004-03-29 | 2005-11-10 | Fuji Photo Film Co Ltd | リーダーテープおよびこれを用いた磁気テープカートリッジ |
-
2004
- 2004-04-13 US US11/578,409 patent/US20080017741A1/en not_active Abandoned
- 2004-04-13 JP JP2004117816A patent/JP2005302168A/ja active Pending
-
2005
- 2005-04-13 DE DE602005021085T patent/DE602005021085D1/de active Active
- 2005-04-13 WO PCT/JP2005/007140 patent/WO2005101407A1/ja active Application Filing
- 2005-04-13 EP EP05730425A patent/EP1736988B1/en active Active
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JPS6171411A (ja) * | 1984-09-17 | 1986-04-12 | Fuji Photo Film Co Ltd | 磁気テ−プ用リ−ダ−テ−プ |
JPS62259221A (ja) * | 1986-05-06 | 1987-11-11 | Toray Ind Inc | リ−ダ−テ−プ |
JPH01106312A (ja) * | 1987-10-20 | 1989-04-24 | Sony Corp | クリーニングリーダーテープ付き磁気テープ |
JPH06111264A (ja) * | 1992-09-30 | 1994-04-22 | Sony Corp | 磁気テープ用リーダテープ |
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Also Published As
Publication number | Publication date |
---|---|
EP1736988A4 (en) | 2007-04-18 |
JP2005302168A (ja) | 2005-10-27 |
EP1736988B1 (en) | 2010-05-05 |
US20080017741A1 (en) | 2008-01-24 |
EP1736988A1 (en) | 2006-12-27 |
DE602005021085D1 (de) | 2010-06-17 |
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