GB1401305A - Magnetic recording materials - Google Patents
Magnetic recording materialsInfo
- Publication number
- GB1401305A GB1401305A GB4067272A GB4067272A GB1401305A GB 1401305 A GB1401305 A GB 1401305A GB 4067272 A GB4067272 A GB 4067272A GB 4067272 A GB4067272 A GB 4067272A GB 1401305 A GB1401305 A GB 1401305A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- magnetic recording
- film
- recording material
- magnetic
- 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.)
- Expired
Links
- 230000005291 magnetic effect Effects 0.000 title abstract 6
- 239000000463 material Substances 0.000 title abstract 4
- 239000011248 coating agent Substances 0.000 abstract 6
- 238000000576 coating method Methods 0.000 abstract 6
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract 2
- 239000006185 dispersion Substances 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 229920000642 polymer Polymers 0.000 abstract 2
- 239000000020 Nitrocellulose Substances 0.000 abstract 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 229920002301 cellulose acetate Polymers 0.000 abstract 1
- 238000004070 electrodeposition Methods 0.000 abstract 1
- 238000007772 electroless plating Methods 0.000 abstract 1
- 239000003302 ferromagnetic material Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229920001220 nitrocellulos Polymers 0.000 abstract 1
- 229920006267 polyester film Polymers 0.000 abstract 1
- -1 polyethylene terephthalate Polymers 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract 1
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 abstract 1
- 239000004814 polyurethane Substances 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000001771 vacuum deposition Methods 0.000 abstract 1
Classifications
-
- 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
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
-
- 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
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/735—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer
- G11B5/7356—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
1401305 Coated magnetic recording material IMPERIAL CHEMICAL INDUSTRIES LTD 3 Aug 1973 [1 Sept 1972] 40672/72 Heading B2E A magnetic recording material comprises a molecularly oriented and heat set polyester film having a coating comprising vinyl chloride polymer particles on one surface and a magnetic coating on the other surface, the vinyl chloride polymer coating having a weight of 0.01 to 1.4 mgdm<SP>-2</SP>. The preferred film is polyethylene terephthalate which may be biaxially oriented. Biaxially oriented film may be further stretched in the transverse direction and then to a greater extent in the longitudinal direction. The coating may be applied prior to, during or after stretching, from aqueous dispersions followed by heating to dry the coating and fuse the particles to the film surface. The magnetic coating may be a ferromagnetic material applied by vacuum deposition, electroless plating, electrodeposition or as a dispersion in a resin binder e.g. polyurethane, cellulose acetate, cellulose nitrate. The recording material may be in the form of magnetic recording tape e.g. computer, audio or video tape.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4067272A GB1401305A (en) | 1972-09-01 | 1972-09-01 | Magnetic recording materials |
| US920016D UST920016I4 (en) | 1972-09-01 | 1973-08-21 | Defensive publication |
| DE19732344341 DE2344341A1 (en) | 1972-09-01 | 1973-09-03 | MAGNETIC RECORDING MATERIALS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4067272A GB1401305A (en) | 1972-09-01 | 1972-09-01 | Magnetic recording materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1401305A true GB1401305A (en) | 1975-07-16 |
Family
ID=10416058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4067272A Expired GB1401305A (en) | 1972-09-01 | 1972-09-01 | Magnetic recording materials |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2344341A1 (en) |
| GB (1) | GB1401305A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140329101A1 (en) * | 2011-10-19 | 2014-11-06 | Mitsubishi Plastics, Inc. | Polyester film |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0046269B1 (en) * | 1980-08-18 | 1986-08-13 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording media and process for fabricating the same |
-
1972
- 1972-09-01 GB GB4067272A patent/GB1401305A/en not_active Expired
-
1973
- 1973-09-03 DE DE19732344341 patent/DE2344341A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140329101A1 (en) * | 2011-10-19 | 2014-11-06 | Mitsubishi Plastics, Inc. | Polyester film |
| US9523000B2 (en) * | 2011-10-19 | 2016-12-20 | Mitsubishi Plastics, Inc. | Polyester film |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2344341A1 (en) | 1974-03-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |