CN1808574A - Tape-shaped recording medium, and apparatus and method for processing the same - Google Patents
Tape-shaped recording medium, and apparatus and method for processing the same Download PDFInfo
- Publication number
- CN1808574A CN1808574A CN 200510129017 CN200510129017A CN1808574A CN 1808574 A CN1808574 A CN 1808574A CN 200510129017 CN200510129017 CN 200510129017 CN 200510129017 A CN200510129017 A CN 200510129017A CN 1808574 A CN1808574 A CN 1808574A
- Authority
- CN
- China
- Prior art keywords
- recording medium
- tape
- dish
- banded recording
- banded
- 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.)
- Granted
Links
Images
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
Abstract
Disclosed are a magnetic tape capable of being wound regularly, and an apparatus and a method by which the tape is wound regularly. The tape-shaped recording medium, which includes a tape-shaped support body and a recording layer being formed on a surface of the support body, is curved laterally over its whole length and said tape-shaped recording medium being curved laterally over its whole length and having a surface arching across a whole width of the medium. Furthermore, it is preferable that a curved amount of the medium ranges from 0.5 mm/m to 4.0 mm/m and an arched amount of the medium ranges from 0.3 mm to 2.0 mm.
Description
Technical field
The present invention relates to the apparatus and method of a kind of banded recording medium, the banded recording medium of processing.More specifically, the present invention relates to the banded recording medium that can rule twines, the apparatus and method of regular winding of band-type recording medium.
Background technology
Usually, be extensive use of for example wide linear pattern and the screw type tape of 12.7mm in the outer duplicated record medium such as computer.Typically under twining, handle the tape of these types around tape reel.Twine though tape is the tape reel that centers on wrapping head or driver, this tape edge is irregular sometimes.Especially, when the high speed wound tape, this irregular easier appearance.Thisly irregularly in the process that transmits, can damage tape, or can cause in the process that stores that tape seriously curls.This serious shape of curling is tended to be held, and it helps the turn round deterioration of accuracy of tape in driver, cause the servo tracking mistake thus.Therefore, with regard to keeping high quality level, it is important that the rule of tape is twined.
On the other hand, be known that if tape has predetermined lateral (laterally) curve form, so its more difficult generation scrambling.This causes the stability of tape even running, improves the servo tracking performance thus.This technical description is in Japanese unexamined patent publication 9-265625.
This predetermined lateral curve form is by being placed on tape on the map plane (plat surface) and by confirming from top view.Alternatively, as shown in Figure 8, it is identified based on the straight line (datum line) that tape MT departs from by two points on a limit of tape.
If crooked scheduled volume on its whole length, tape will be twined by rule so.Otherwise its winding form may worsen.Therefore, in order to roll tape aptly, various technology have been advised, for example Japanese unexamined patent publication 9-138945 and 2004-164808 with the tape weave scheduled volume.Herein, amount of bow is represented that by D/L wherein L represents the concrete length of tape, and L represents the maximal value with the amount that departs from datum line.
JP9-138945 disclose a kind of in the process of tape preparation process the technology of crooked tape.Particularly, tape is twined around taper band twisting surface.After this, its former state keeps official hour.At last, launch the one side of wound tape, make tape weave.
JP2004-164808 also disclose a kind of in the process of tape preparation process the technology of crooked tape.In this technology, tape is twined around taper reel dish core.Then, it is being equaled/place less than former state under the glass transition temperature.Be heated by this,, guarantee the uniform winding form of tape thus suitably bending of tape.
Simultaneously, if the surface of tape is forming the direction archwise of magnetosphere, its persistence is improved so, therefore prevents dropout (data error) (referring to Japanese unexamined patent publication 5-307731 and 8-63740).Herein, this arc being called of tape " warpage (cupping) ".
In the tape of the technology of using JP9-265625, its winding form is typically better, because tape is more crooked.But under certain conditions, that is, according to the surface property of tape, edge shape, edge rigidity etc., its winding form may be irregular.In this case, can not provide the production output that needs.
In addition, according to the technology of JP9-138945, owing to the space between the wound tape, along the thickness difference of width or the burr (flash) of tape reel, tape separation disc core is far away more, and dish core shape is more not remarkable to the effect of twining form.In addition, because the variation of the shape of workmanship or tape reel dish core, the winding form may be subjected to the tolerance of tape length or the influence of curved shape.
In addition, in the technology of JP2004-164808, therefore tape can form the gap in the centre of tape reel owing to thermal treatment is shunk.These gaps cause the scrambling of tape reel.In this case, the surface of tape may be damaged, or perhaps following processing can not be carried out.In heat treated process, the fixing and inwardly extruding with tape is so that tape becomes wideer towards the inside of scroll.
As for as the tape warpage among JP5-307731 and the JP8-63740, be known that not produce enough effects.
Consider above-mentioned shortcoming, conceived the present invention.An object of the present invention is to provide a kind of tape that can rule twines, the apparatus and method of regular wound tape.
Summary of the invention
According to an aspect of the present invention, provide a kind of banded recording medium, it comprises banded supporter and the recording layer that forms on the surface of supporter.In addition, medium is transverse curvature on its whole length, and has the surface of archwise on the whole width that crosses medium.
In addition, in this medium, the amount of bow of preferable medium is 0.5mm/m to 4.0mm/m, and the arc amount of medium is 0.3mm to 2.0mm.
In addition, in this medium, preferred supporter is to be made by in ethylene glycol terephthalate film, PEN film and the aromatic poly amide film any one.
According to a second aspect of the invention, a kind of method of processing banded recording medium is provided, this method comprises: by rolling the step that banded recording medium is made dish around the taper twisting surface of dish core, with to the dish step of heat treatment, wherein when making dish, the diameter that the dish core has is at least 0.5 times of dish external diameter.
In addition, in the method, relation is satisfied in the thermal treatment that preferred dish carries out:
t≥k·T
-5
Wherein t, k and T respectively express time (h), coefficient and treatment temperature (℃).
According to a further aspect of the invention, provide a kind of device of processing banded recording medium, this device comprises:
(1) supply reel can be rolled a plurality of banded recording mediums source around this supply reel;
(2) cutting mechanism is used for this source is cut into preset width, forms banded recording medium thus; With
(3) a plurality of spoolers are used to roll corresponding banded recording medium, therefore produce a plurality of dishes;
Described spooler, each comprises the dish core (hub) with outside surface, can roll banded recording medium around this outside surface, and the dish core has first and second sides, and described side diameter separately is different mutually.
In addition, in the diameter of two sides with the dish core diameter L3 of a longer L1 and each dish between ratio be set at and satisfy relation:
0.5≤L1/L3≤1.0。
When in conjunction with the accompanying drawings, by instructions and the claim below reading is provided, other aspects of the present invention, feature and advantage become more clear.
Description of drawings
In order to understand the present invention and advantage thereof more fully, now below description taken together with the accompanying drawings is carried out reference, wherein:
Fig. 1 is the skeleton view of describing around the tape of dish core winding;
Fig. 2 is the sectional view of tape along its width;
Fig. 3 A is a planimetric map of describing the crooked tape of forward;
Fig. 3 B is a planimetric map of describing the reverse bending tape;
Fig. 4 A is the sectional view of the major part of tape reel, wherein tape is twined around tape reel dish core equably;
Fig. 4 B is the sectional view of the major part of tape reel, wherein tape is anisotropically twined around tape reel dish core;
Fig. 5 shows the amount of warpage of tape and the chart of amount of bow combination;
Fig. 6 describes according to an embodiment of the invention, processes the skeleton view of production line of winding step of the method for tape;
Fig. 7 is a sectional view of implementing the dish of this method; With
Fig. 8 is a planimetric map of explaining the curved shape of tape.
Embodiment
Below with reference to the accompanying drawings, providing all is banded recording medium according to an embodiment of the invention and the detailed description of processing this dielectric method.Should be noted in the discussion above that in the following description, the example of tape as banded recording medium is provided, but the invention is not restricted to this.Alternatively, banded recording medium can be an optical record medium.
At first, description is according to the tape of one embodiment of the invention.
(tape)
With reference to figure 1, tape MT comprises non magnetic supporter (basal film), magnetosphere (recording layer) and back coating.Magnetosphere and back coating are formed on the respective surfaces of basal film.In addition, the whole thickness of tape MT is about 10 μ m.
＜supporter 〉
The example of the material of supporter comprises polyester (for example ethylene glycol terephthalate (PET), PEN (PEN)), polyolefin (for example polypropylene), cellulosic material (for example nitrocellulose) and polymeric material (for example polyamide, polyimide, Polyvinylchloride, polycarbonate or aromatic poly amide).Preferred supporter is made by polyester, because it is lower cost materials and has good processability and mechanical property.Preferably, use PEN (PEN), because its high strength, rigidity and heat resistance.More preferably, if heat resistance is crucial, use the aromatic poly amide film.
＜magnetosphere 〉
In organic solvent, mix magnetic and bonding agent.Then, the magnetic that evenly distributes.As a result, preparation magnetic coating.Then, this magnetic coating of coating on the surface of non magnetic supporter.At last, form magnetosphere.Alternatively, with vacuum moulding machine or sputter, with ferrimagnet for example metal or alloy be bonded on the supporting body surface.In order to follow the tracks of the trend of current high-density capacity, the thickness of preferred magnetosphere equals/less than 0.3 μ m.In addition, in magnetic coating, add spreading agent, lubricant, antistatic agent, plastifier, stabilizing agent and corrosion inhibitor.
The example of magnetic comprises: ferromagnetism iron oxide particles (y-Fe for example
2O
3, Fe
3O
4Or cobalt y-Fe
2O
3), ferromagnetic chromium dioxide particle, metal (for example Fe, Co or Ni), comprise alloy and the hexgonal screw particulate of metal (for example Fe, Co or Ni).
The example of bonding agent comprises polymkeric substance (for example polyurethane, Polyvinylchloride, polyvinyl acetate, polyvinyl alcohol (PVA), poly-inclined to one side vinylidene chloride, polyacrylate, polystyrene, polybutylene or polyacrylonitrile), by two or more multipolymers of forming, vibrin and epoxy resin in them.
The example of organic solvent comprises ether, ester, ketone, aromatic hydrocarbon, aliphatic hydrocarbon and chlorinated hydrocabon.
＜back coating 〉
Back coating can be known back coating, and its material can be the carbon that comprises bonding agent and solvent.Preferred its thickness equals/greater than 0.3 μ m.
＜amount of warpage D1 〉
With reference to figure 2, tape MT adopts surperficial MT1 to form outwards arc this mode bending, and in other words, surperficial M2 forms inwardly arc.When the tape loading is carried in the driver, the feasible contact that can improve between tape and the magnetic head of this bowed shape.
Particularly, the thickness of supposing the tape of Fig. 2 is 12.7mm (1/2 inch), and then amount of warpage (arc amount) D1 is 0.3mm to 2.0mm.
The combination of the thickness by magnetosphere and back coating can be regulated amount of warpage D1.Lift row, suppose on the thick supporter of making by the ethylene glycol terephthalate film of 6 μ m, to form the thick magnetosphere of 1.5 μ m.Thickness by the setting back coating is 0.3 μ m to 0.7 μ m, and the scope of the amount of warpage D1 that obtains is 0.3mm to 2.0mm.
Alternatively, can regulate amount of warpage D1 by selecting every layer the thermal shrinkage factor.
In addition, in the present embodiment, surperficial MT1 outwards forms arc, still, the invention is not restricted to this.Alternatively, the outside archwise of surperficial MT2.
＜amount of bow D2 〉
With reference to figure 3A and 3B, tape MT is with respect to the transverse curvature by the datum line C of some A on the limit of tape and B.Particularly, its amount of bow D2 can be 0.5mm/m to 4.0mm/m.
In the present embodiment, the direction of the tape MT bending of Fig. 3 A is defined as direction, and the direction of the tape MT bending of Fig. 3 B is decided to be reverse direction.
How crooked tape MT is as described below.At first, around dish core 11 wound tapes, form dish PC thus.Then, this dish is heat-treated according to the method for describing after a while.
The combination of＜amount of bow D2 and amount of warpage D1 〉
As the result of thoroughgoing and painstaking research, the inventor has been found that the suitable combination of amount of bow D2 and amount of warpage D1.This suitable combination is as follows.
With the naked eye assess the winding form of tape MT, and this results are shown among Fig. 5.The gross thickness of the tape MT of assessment is 8 μ m, and it comprises magnetosphere that 0.15 μ m is thick and the supporter of being made by the ethylene glycol terephthalate film.When amount of bow D2 and amount of warpage D1 variation, check the winding form and carry out demonstration test.This results are shown in the table 1.
In table 1, the mark that twines form is defined as follows:
Edge " ed " from tape MT
5: do not find scrambling;
4: find to equal/less than the scrambling of 0.05 μ m.
3: the scrambling that is found to be about 0.2mm;
2: find to equal/greater than the scrambling of 0.3mm etc.;
1: find 3 or a plurality of equaling/greater than the scrambling of 0.3mm.
In addition, tape MT is that demonstration test was used for checking the distortion of scraping and edge " ed " after 40 ℃ and humidity were to turn round 500 hours for 20% time in temperature.
Table 1
| Amount of bow D2 (mm/m) | Amount of warpage D1 (mm) | Winding form mark | The winding form is determined | | |
| Embodiment | |||||
| 1 | 1.5 | 1.5 | 5 | Well | By |
| | 3.5 | 0.4 | 4 | Well | By |
| | 3.8 | 1.5 | 5 | Well | By |
| Comparative example 1 | 0.3 | 0.8 | 1 | Difference | By |
| Comparative example 2 | 0.4 | 2.2 | 2 | Difference | Failure |
| Comparative example 3 | 1.6 | 0.1 | 3 | Difference | By |
| Comparative example 4 | 4.8 | 2.6 | 5 | Well | Failure |
| Comparative example 5 | 5.2 | 0.6 | 5 | Well | Failure |
Assessment result from top embodiment 1 to 3 is clear that along with amount of bow D2 is big more, the winding form is good more.But because damage of edges and distortion, the sample that amount of bow D2 surpasses 4.0mm/m fails to satisfy the quality standard in endurance life test.In addition, amount of warpage D1 surpasses the sample failure of 2.0mm.
Fig. 5 is the chart that is used for determining the desirable combination between amount of bow D2 and the amount of warpage D1.In the figure, twine the allowed band of shape and demonstration test by dotted lines.Be clear that from this chart amount of bow D2 is that 0.5mm/m to 4.0mm/m and amount of warpage D1 are that the tape MT of 0.3mm to 2.0mm has excellent winding form and quality.
With reference to figure 4A and 4B,, then the tape former state is loaded and transported the tape reel dish core 21 winding scheduled volumes of tape MT around tape reel 2 with flange.In this case, can establish excellent winding form according to the tape MT of this embodiment, one of them edge is uniformly, shown in Fig. 4 A.This makes and can obtain high production productive rate and can make the even running of tape MT stable, improves the servo tracking performance thus.On the contrary, the tape M that amount of warpage D1 and amount of bow D2 do not fall into above-mentioned scope provides poor winding form, and wherein edge " ed " is uneven, shown in Fig. 4 B.
In addition, the tape MT according to the present embodiment reaches long-play and prevents dropout (data error).
(processing the method and apparatus of banded recording medium)
Then, below with reference to accompanying drawing, providing all is description according to the method and apparatus of the banded recording medium of the processing of embodiment of the present invention.What note is in the following description, with the example of tape as banded recording medium, still, to the invention is not restricted to this.The method of processing banded recording medium (tape) is intended to transverse curvature medium scheduled volume.This method comprises: make the winding step of dish (scroll) and the hot-working step that dish is heat-treated by tape source or coiled material.
(tape source)
Below, before describing each step, the tape source that is used to form dish is described.The tape source has the structure identical with tape (referring to Fig. 1), and it is by equaling/constituting less than the last magnetosphere that forms of the thick non magnetic supporter (basal film) of 10 μ m.In addition, the tape source is cut into predetermined width, make tape MT thus.
Below with reference to Fig. 6 winding step is described.In the present embodiment, winding step comprises: cutting tape source, that is, coiled material WB forms a plurality of tape MT thus, then, rolls around corresponding dish core 11, so that form dish 1.But winding step of the present invention is not subjected to the restriction of top step.Alternatively, winding step of the present invention can comprise: roll the tape that is cut into dish.
With reference to figure 6, carry out the production line of winding step on it and form by following:
(1) supply reel 2 of rotation coiled material WB;
(2) cutting coiled material WB is the cutter sweep 3 of preset width, forms a plurality of tape MT thus; With
(3) take-up mechanism 4, and it for example is positioned in and rolls tape MT at three phases and around dish core 11.
In addition, production line comprises:
(4 with the deflector roll 5 of coiled material WB from supply reel 2 guiding cutter sweeps 3;
(5) the ground suction drum 6; With
(6) jockey pulley 7 that provides with respect to take-up mechanism 4.
For example make by aluminium, AS resin, phenolics or epoxy resin by metal for each dish core 11.In order to strengthen, preferably in this material, add the glass fibre of 10 weight % to 40 weight %.
With reference to figure 7, dish core 11 has two different mutually side 11a of diameter L1 and L2 separately and 11b.In other words, dish core 11 has taper twisting surface 11c.In case twine around twisting surface 11c, tape MT is by transverse curvature.In following table 2, shown with respect to amount of bow D2 the ratio (L1/L2) of the diameter separately of side 11a and 11b.
Table 2
| Amount of bow (mm/m) | 0.5 | 1 | 2 | 4 | 8 |
| Natural scale (L1/L2) | 1.00007 | 1.0001 | 1.0003 | 1.0006 | 1.0012 |
Be clear that from this table the optimum range of natural scale is 1.00007 to 1.0012.If amount of bow D2 is set at 4mm/m, amount of bow D2 is 1.0006 so.Notice that as the width change of fruit tray core, it need be determined based on top ratio.
In addition, preferably in dish core 11, the diameter L1 of side 11a is at least 0.5 times of external diameter L3 of dish 1 (L1 〉=L30.5).This can limit around the quantity of the tape MT of dish core 11 windings.Therefore, the shape of dish core 11 can be more significantly to the tape generation effect on the lateral surface of dish 1.As a result, can the crooked exactly tape on the lateral surface of dish 1.On the contrary, in traditional winding step, use that to be diameter be the dish core of 11.4cm and the diameter dish as 36.0cm.In other words, use is the dish core that is about 0.3 times of dish.In this case, there is not accurately crooked tape on the lateral surface of dish 1.
In the production line of the winding step recited above of Fig. 6, for coiled material WB, make it pass through cutter sweep 3 then, so that coiled material WB is cut into a plurality of tape MT at tape reel 2 places by guiding such as deflector roll 5 grades.Then, around the corresponding dish of take-up mechanism 4 core 11 wound tape MT, the winding tension that will coil core 11 simultaneously be adjusted to equal/greater than 0.8N/cm.By winding tension being adjusted to this value, can reduce the variation of tape width.The back will provide the detailed description about winding tension.At last, around dish core 11 wound tape MT, so that preparation dish 1.
(hot-working step)
After the winding step, dish 1 carries out the thermal treatment of the schedule time, sets up suitable winding form thus.
In this step, need to satisfy relation of plane down:
t≥k·T
-5
T express time (h) wherein, k represent coefficient and T represent treatment temperature d (℃).
Coefficient k is the proportionality constant that depends on the supporter of tape MT (or tape source).For instance, suppose that supporter made by ethylene glycol terephthalate (PET), then k is 10
10, preferred k is 2 * 10
10Be this value by setting coefficient k, can use amount of bow D2 is enough for practical application.In addition, treatment temperature T need equal/less than the glass transition temperature of the supporter of tape MT.Particularly, temperature T falls in 40 ℃ to 69 ℃ the scope.
Be known that when the dish 1 of Fig. 7 is heat-treated, reduced the stress of all MT2 in the middle of being applied to, because the difference (L3-L1) between interior all MT1 and the periphery MT3 is bigger.The reduction of this stress can cause the scrambling of tape.But, in the present embodiment,, reduced the winding quantity of tape MT by using significantly big dish core 11.Therefore, difference (L3-L1) reduces.Because this minimizing of difference (L3-L1), so there is not to reduce the stress that is applied to middle all MT2.Therefore be difficult to occur the scrambling at dish 1 edge.In addition,, be squeezed, therefore prevent to be broadened so prevented tape to also reducing that tape applies to internal stress.
Thereby, by reducing the quantity of the tape MT in dish 1, stably transverse curvature tape MT.Shown in Fig. 4 A or 4B, with the tape reel dish core 21 winding scheduled volumes of tape MT around tape reel 2 with flange.In the present embodiment, because tape MT is by crooked aptly, so the edge of tape MT " ed " is regular.Therefore, shown in Fig. 4 A, set up uniform winding form.On the contrary, if use is that wherein tape is by suitable crooked dish, the edge of tape MT " ed " is irregular so.That is, shown in Fig. 4 B, the winding form is uneven.
When reducing the quantity of the tape MT that centers on dish core 11, it is irregular during heating treatment being difficult to make the tape of locating in middle week.This has prevented that tape MT from being rubbed, so do not damage tape MT.In addition, during heating treatment also reduced the variation of the tape width at all MT1 place in inside.It is uneven that this has prevented that the edge " ed " of tape MT from becoming, so do not damage edge " ed ".
On the other hand, in order to increase the productivity of a factory, need as far as possible longways around dish core 11 wound tape MT.But the tape of winding is long more, the easy more appearance of shortcoming recited above, and for example amount of bow reduces, tape width increases, or the tape edge is irregular.In order to find suitable the trading off between tape length and quality, the assessment below having made.
(diameter of dish core)
Center on the NAB-standard plate core that diameter is respectively 114m (the taper amount is 30 μ m), 150m (the taper amount is 40 μ m) and 250m (the taper amount is 70 μ m), twine the thick three bar identical tapes long of 9 μ m with 4000m.Then, after these tapes are heat-treated, assess and compare the degree of their individual quality.This results are shown in the table 3.The individual taper amount of dish core is suitable for the amount of bow of 2mm/m.In this case, notice that the taper scale shows the difference (L4 among Fig. 7) between the diameter of a side and another side, and wide variety is represented the increase of tape width.
Table 3
| Dish core diameter (mm) | Dish core diameter/dish diameter | Interior all amount of bow (mm/m) | Periphery amount of bow (mm/m) | The scrambling at tape edge | Tape width changes (μ m) | |
| | 150 | 0.57 | 1.6 | 0.8 | | 3 |
| | 250 | 0.76 | 1.8 | 1.2 | | 2 |
| Comparative example 1 | 114 | 0.47 | 1.7 | 0.2 | | 6 |
Reference table 3, comparative example 1 (diameter is the dish core of 114mm) shows the marked difference between the inner periphery and the outer periphery amount of bow.Particularly, its interior all amount of bow are 1.7mm/m, and its periphery amount of bow is 0.2mm/m.Therefore, this sample is not by crooked equably.In addition, this sample causes edge irregularity and it to show that the variation of tape width is greatly to 6 μ m.
On the contrary, embodiment 1 (diameter is the dish core of 150mm) does not almost show the marked difference between the inner periphery and the outer periphery amount of bow.Particularly, its interior all amount of bow are 1.6mm/m, and its periphery amount of bow is 0.8mm/m.In addition, do not cause the friction of tape, the variation of tape width has only the medium-sized of comparative example 1.In addition, in embodiment 2 (diameter is the dish core of 250mm), interior all amount of bow are 1.8mm/m, and the periphery amount of bow is 1.2mm/m.In addition, the edge is even, and the variation of tape width has only 1/3rd of comparative example 1.
From top found that, the diameter of dish core need equal/greater than 0.5 times of dish diameter, be preferably 0.6 times.But, consider the space factor of take-up mechanism, the diameter of preferred dish equals/less than 600mm.In addition, suppose that winding width is that 9 μ m and length are the tape of 10000m, then the diameter of preferred tray core is at most 500mm.The diameter of dish core is short more, and its effect is not obvious more.But, be clear that by the result even use the dish core (embodiment 1) of diameter as 150mm, this effect is still not enough to practical application.
(amount of bow)
For with the crooked requirement of tape MT, need the dish core to have and the proportional taper amount of its diameter.This taper amount is following definite.
[the dish core diameter is 150mm] table 4
| Amount of bow (mm/m) | 0.5 | 1 | 2 | 4 | 8 |
| Taper amount (μ m) | 10 | 15 | 45 | 90 | 180 |
[the dish core diameter is 200mm] table 5
| Amount of bow (mm/m) | 0.5 | 1 | 2 | 4 | 8 |
| Taper amount (μ m) | 14 | 20 | 60 | 120 | 240 |
[the dish core diameter is 250mm] table 4
| Amount of bow (mm/m) | 0.5 | 1 | 2 | 4 | 8 |
| Taper amount (μ m) | 18 | 25 | 75 | 150 | 300 |
Then, around the taper twisting surface wound tape of dish core, then it is heat-treated, condition is that temperature is 60 ℃, and humidity is 25%, and the time is 32 hours.After this is handled, measure the amount of bow of tape, this results are shown in the table 7.Every is the mean value of measuring 5 times data.
Table 7
| Dish core diameter (mm) | Taper amount (μ m) | Amount of bow (mm/m) | |
| | 150 | 10 | 0.53 |
| | 150 | 90 | 3.89 |
| | 250 | 18 | 0.45 |
| | 250 | 150 | 4.21 |
In embodiment 3, by using the dish core (referring to table 4) of diameter as 150mm, the taper amount of dish core is a target with 10 μ m, to form the amount of bow of 0.5mm/m.The actual flexion amount is 0.53mm/m, and it is desired value no better than.By reference table 4 to 6, find that other embodiment 4 to 6 also has the bending value that needs.
(winding tension)
Around diameter is the non-conical surface wound tape of 250mm dish core, changes its winding tension simultaneously, and this assessment is shown in Table 8.In this case, speed of wrap is set at 10m/s.
Table 8
| Winding tension (gf/0.5 inch) | Interior all amount of bow (mm/m) | Periphery amount of bow (mm/m) | The scrambling of tape | Tape width changes (μ m) | |
| | 100 | 1.8 | 1.2 | | 1 |
| Embodiment 8 | 120 | 1.8 | 1.3 | | 1 |
| Comparative example 2 | 80 | 1.8 | 1.4 | | 2 |
Reference table 8 in these samples, does not have marked difference between the inner periphery and the outer periphery amount of bow.But, be under the condition of 80gf/0.5 inch (≈ 0.6N/cm) at winding tension, comparative example 2 causes the scrambling at edge and the tape width of demonstration to be changed to 2 μ m.On the contrary, be under the 100gf/0.5 inch (≈ 0.8N/cm) at winding tension, embodiment 7 shows do not have edge irregularity and tape width to be changed to 1 μ m.It is one medium-sized that this tape width changes that the tape width that has only comparative example 2 changes.Therefore, as can be seen, embodiment 7 shows excellent result.In addition, be under the 120gf/0.5 inch (≈ 0.9N/cm) at winding tension, embodiment 8 shows excellent similarly to Example 7 result.
Consider The above results, by equaling/greater than wound tape under the winding tension of 0.8N/cm, can prevent the scrambling of tape, also reduced the variation of tape width.It show strengthened imposing on tape to internal stress, in other words,, make the variation of tape width big because winding tension increases.But, in fact, think because this strong winding tension is long and narrow with tape stretch.
(hot-working time)
Temperature and time when decision band curved shape is saturated in thermal treatment relating under the constant condition of other parameters that curved shape forms, is measured amount of bow by changing temperature and time.This results are shown in the table 9.The dish of heat-treating comprises the supporter of being made by ethylene glycol terephthalate (PET), and it is under the 100gf/0.5 inch at winding tension, is that the dish core of 200mm twines around diameter.
Table 9
| Temperature (℃) | 25 | 40 | 50 | 60 | 65 |
| Time (h) | 2160 | 168 | 72 | 24 | 18 |
| t＝2×10×T -5 | 2048 | 195 | 64 | 25 | 17 |
| Amount of bow (mm/m) | 1.6 | 1.7 | 1.9 | 1.8 | 2.0 |
From the result of table 9, temperature T when the decision curved shape is saturated and the following relation between the time t:
t≈2·10·T
-5
As for the hot-working step of reality, need to reach compromise between throughput rate and the effect.Therefore, after during half of the saturation time that tape is being determined, being heated, measure the amount of bow of tape.This measurement result is shown in Table 10.
Table 10
| Temperature (℃) | 25 | 40 | 50 | 60 | 65 |
| Time (h) | 1080 | 84 | 36 | 12 | 9 |
| Amount of bow (mm/m) | 1.2 | 1.0 | 1.0 | 1.3 | 1.2 |
The result of reference table 10 even find for saturation time half, has also obtained enough amount of bow.Therefore, can represent relation between temperature T and the time t by following equation:
t≥1010·T
-5
Note, can change T according to the condition of supporter etc.
-5Coefficient.Therefore, the relation between temperature T and the time t only satisfies following equation:
t≥k·T
-5
In addition, preferably humidity is adjusted in 20% to 80% the scope, thus prevented that tape is irregular, and reduced the variation of tape width.
By explanation recited above, those skilled in the art knows essential characteristic of the present invention, can be under the condition of the spirit and scope that do not depart from claim modifications and variations of the present invention are so that it is suitable for various uses and condition.
Claims (18)
1, a kind of banded recording medium, it comprises:
Banded supporter;
With the recording layer that on supporting body surface, forms,
Described banded recording medium transverse curvature and have the surface of the whole width archwise that crosses medium on its whole length.
2, according to the banded recording medium of claim 1,
The amount of bow of its medium is that the arc amount of 0.5mm/m to 4.0mm/m and medium is 0.3mm to 2.0mm.
3, according to the banded recording medium of claim 1,
Wherein supporter is selected from: ethylene glycol terephthalate film, PEN film and aromatic poly amide film.
4, according to the banded recording medium of claim 2,
Wherein supporter is selected from: ethylene glycol terephthalate film, PEN film and aromatic poly amide film.
5, according to the banded recording medium of claim 2,
Wherein arc amount is meant the lateral edges of arc medium and the distance between the top.
6, according to the banded recording medium of claim 5,
Wherein on another surface of supporter, form back coating and
Wherein arc amount can be adjusted by the thickness of change recording layer and the thickness of back coating.
7, a kind of method of processing banded recording medium, this method comprises:
Make dish by rolling banded recording medium around the taper twisting surface of dish core; With dish is heat-treated;
Wherein when making dish, the diameter of dish core is at least 0.5 times of dish external diameter.
8, according to the method for the banded recording medium of the processing of claim 7,
Wherein when making dish, using at least, the winding tension of 0.8N/cm centers on dish core winding of band-type recording medium.
9, according to the method for the banded recording medium of the processing of claim 7,
Wherein relation is satisfied in the thermal treatment carried out of dish:
t≥k·T
-5
Wherein t, k and T respectively express time (h), coefficient and treatment temperature (℃).
10, the method for the banded recording medium of processing according to Claim 8,
Wherein relation is satisfied in the thermal treatment carried out of dish:
t≥k·T
-5
Wherein t, k and T respectively express time (h), coefficient and treatment temperature (℃).
11, according to the method for the banded recording medium of the processing of claim 7,
Wherein the upper temperature limit in the thermal treatment that dish carries out is the glass transition temperature of supporter.
12, according to the method for the banded recording medium of the processing of claim 9,
Wherein the upper temperature limit in the thermal treatment that dish carries out is the glass transition temperature of supporter.
13, according to the method for the banded recording medium of the processing of claim 10,
Wherein the upper temperature limit in the thermal treatment that dish carries out is the glass transition temperature of supporter.
14, a kind of device of processing banded recording medium, it comprises:
Supply reel can be rolled a plurality of banded recording mediums source around this supply reel;
Cutting mechanism is used for this source is cut into preset width, forms banded recording medium thus; With a plurality of spoolers, be used to roll corresponding banded recording medium, therefore produce a plurality of dishes;
Described spooler, each comprises the dish core with outside surface, can roll banded recording medium around this outside surface, and the dish core has first and second sides, and described side diameter separately is different mutually.
15, according to the device of the banded recording medium of the processing of claim 14,
Wherein will coil longer in the diameter of two sides of a core L1 and each dish diameter L3 between ratio be set at and satisfy relation:
0.5≤L1/L3≤1.0。
16, according to the device of the banded recording medium of the processing of claim 14,
Wherein the winding tension with 0.8N/cm to 0.9N/cm twines each banded recording medium around the dish core.
17, according to the device of the banded recording medium of the processing of claim 15,
Wherein the winding tension with 0.8N/cm to 0.9N/cm twines each banded recording medium around the dish core.
18, according to the banded recording medium of claim 1,
Wherein the winding tension with 0.8N/cm to 0.9N/cm twines each banded recording medium around the dish core.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004345138A JP2006155758A (en) | 2004-11-30 | 2004-11-30 | Method for treating tape |
| JP2004345138 | 2004-11-30 | ||
| JP2004-345138 | 2004-11-30 | ||
| JP2005068289A JP2006252679A (en) | 2005-03-11 | 2005-03-11 | Tape-shaped recording medium |
| JP2005068289 | 2005-03-11 | ||
| JP2005-068289 | 2005-03-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808574A true CN1808574A (en) | 2006-07-26 |
| CN1808574B CN1808574B (en) | 2010-12-01 |
Family
ID=36633865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510129017 Expired - Fee Related CN1808574B (en) | 2004-11-30 | 2005-11-29 | Tape-shaped recording medium, and apparatus and method for processing the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006155758A (en) |
| CN (1) | CN1808574B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024022A (en) * | 2015-03-31 | 2016-10-12 | 国际商业机器公司 | Method, device and system for determining estimated position information of magnetic recording tape |
| CN110176255A (en) * | 2018-02-20 | 2019-08-27 | 富士胶片株式会社 | Cassette |
| CN110319795A (en) * | 2018-03-29 | 2019-10-11 | 宝山钢铁股份有限公司 | A kind of measurement method and system of steel plate coating thickness |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004280920A (en) * | 2003-03-14 | 2004-10-07 | Tdk Corp | Method for manufacturing magnetic tape |
-
2004
- 2004-11-30 JP JP2004345138A patent/JP2006155758A/en active Pending
-
2005
- 2005-11-29 CN CN 200510129017 patent/CN1808574B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024022A (en) * | 2015-03-31 | 2016-10-12 | 国际商业机器公司 | Method, device and system for determining estimated position information of magnetic recording tape |
| CN106024022B (en) * | 2015-03-31 | 2019-01-15 | 国际商业机器公司 | For determining the method, apparatus and system of the location information of the estimation of magnetic recording tape |
| CN110176255A (en) * | 2018-02-20 | 2019-08-27 | 富士胶片株式会社 | Cassette |
| CN110176255B (en) * | 2018-02-20 | 2021-11-23 | 富士胶片株式会社 | Magnetic tape cassette |
| CN110319795A (en) * | 2018-03-29 | 2019-10-11 | 宝山钢铁股份有限公司 | A kind of measurement method and system of steel plate coating thickness |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006155758A (en) | 2006-06-15 |
| CN1808574B (en) | 2010-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10403318B2 (en) | Magnetic tape having characterized back coating layer | |
| US10522180B2 (en) | Magnetic tape including characterized magnetic layer, tape cartridge, recording and reproducing device, and method of manufacturing | |
| US9721606B2 (en) | Magnetic tape and method of manufacturing the same | |
| US10424330B2 (en) | Magnetic tape having characterized back coating layer | |
| US20180240475A1 (en) | Magnetic tape | |
| US9704527B2 (en) | Magnetic tape and method of manufacturing the same | |
| JP2018137019A (en) | Magnetic tape | |
| CN1674105A (en) | Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus | |
| CN1808574A (en) | Tape-shaped recording medium, and apparatus and method for processing the same | |
| CN1822094A (en) | Magnetic recording medium, recording/reproducing apparatus, and stamper | |
| CN1856823A (en) | Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus | |
| CN1878653A (en) | Film and magnetic-recording medium using the same | |
| CN1332445A (en) | Magnetic head | |
| CN1581303A (en) | Tape winding method | |
| CN1210695C (en) | Magnetoresistive head, and magnetic recording/reproducing apparatus using same | |
| CN1230801C (en) | A perpendicular magnetic memory medium, a manufacturing method thereof, and a magnetic memory storage | |
| CN1345034A (en) | Magnetic tape | |
| CN1095748C (en) | Aromatic polyamide film and magnetic recording media made by using same | |
| CN1179326C (en) | Magnetic head and its manufacture method | |
| CN100351905C (en) | Meghetic recording medium and its manufacturing method, maghetic recorder, and maghetic recording method | |
| US7550212B2 (en) | Tape-shaped recording medium, and apparatus and method for processing the same | |
| US7369363B2 (en) | Method for producing magnetic tape in which a prescribed winding habit is imparted to the magnetic tape | |
| CN1922244A (en) | Biaxially oriented polyester film | |
| CN100504467C (en) | Optical transmission protocol array primary plate and optical transmission protocol array production method | |
| JP2007115353A (en) | Method of heat treating tape, and method of manufacturing tape with curling tendency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: FUJI PHOTO FILM CO., LTD. Free format text: FORMER OWNER: FUJIFILM HOLDINGS CORP. Effective date: 20070810 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20070810 Address after: Tokyo, Japan Applicant after: Fuji Film Corp. Address before: Tokyo, Japan Applicant before: Fuji Photo Film Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20131129 |