CN1938761A - Additive-free fiber for metal texture of hard disk drives - Google Patents
Additive-free fiber for metal texture of hard disk drives Download PDFInfo
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- CN1938761A CN1938761A CNA2005800096785A CN200580009678A CN1938761A CN 1938761 A CN1938761 A CN 1938761A CN A2005800096785 A CNA2005800096785 A CN A2005800096785A CN 200580009678 A CN200580009678 A CN 200580009678A CN 1938761 A CN1938761 A CN 1938761A
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- fabric
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- texture
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Abstract
A fabric for forming a storage media disk texturing member is formed from a non-woven polymeric material formed from fibers and having substantially no titanium dioxide. A method for texturing a surface of a metal storage media disk is also disclosed.
Description
Technical field
The present invention relates to fabric, more particularly, the present invention relates to be used to form the non-additive fabric of hard disk drive superficial makings.
Background technology
When making storage medium as hard disk (in hard disk drive), the surface of these video discs must form, so that a smooth and flawless surface to be provided.Along with disk storage capacity increases, the standard of magnetic disk surface also can improve.
Nylon is used to the popular material that video disc provides the fabric of grain surface.。The nylon fiber of preparation fabric typically forms from polymkeric substance weaving, extrude with pelletization in, this polymkeric substance dopes titania (TiO to some extent in molten condition
2).Additive is used for making technology to become simply, provide rheological charactristics and light to suppress the gloss of (light inhibition) and cancellation fabric.
Non-additive fiber is known, yet these fibers are almost transparent and have gloss highly, and use for common fabric, and it is not desired.Therefore, these have the fiber of abundant gloss only to be applied in the specific application.
Have been found that: when the surface becomes more and more smooth 5 that are reduced to when following, the cut of the metal medium that forms texture subtly that is used to make hard disk drive (as the Winchester hard disk) is become the problem that increases day by day.
Minute scratch marks is out of question under higher mean roughness situation, but can cause the failure at high proportion of recording medium state of the art.Have been found that: be not used under the lapping compound condition of finishing textured surfaces, using available texturing recording strip to cause and be similar to the meticulous cut of seeing in the disk that damages, the titania that uses in the fiber is believed it is a reason.
Known fabric uses the fiber of the filling TiO 2 of standard, and it has demonstrated and has produced high scratch levels.These cuts bear results to not obtaining being used to have the 120G surface that can allow the people accept of the advanced disk drives of capacity per square inch.
The fabric of no titania may be used for the application of glass medium.It is not relevant with cut using the reason of non-additive like this fiber in the glass medium application, but relevant with the pollution of controlling glass surface with the fiber that grinds.The potential fiber that is used in the glass medium field is a dacron.
Therefore, need a kind of fiber that does not have additive, this fiber can be used on disc surface and forms in the fabric of texture.What expect is that this fibrid fabric is based on fabric (fiber), and preparation easily.More expectation is, uses such fabric to cause the surface scratch that reduces, and it can provide the suitable hard disk recording capacity that is allowed with process conditions.
Summary of the invention
A kind of fabric that is used to form the storage media disk texture part, it is made up of nonwoven polymeric material, and this polymeric material is formed by fiber, and does not contain titania substantially.Be preferably formed to have and be less than or equal about 0.02 Denier (Denier), more preferably be about the fabric of 0.01～0.02 Denier.
Fibre-forming polymer can be the combination of nylon and polycarbamate, and wherein nylon and polycarbamate are about 1: 1～about 3: 1 ratio.
A kind of method that is used for forming in metal storage medium panel surface texture may further comprise the steps: provide a kind of this polymeric material of fabric that is formed by nonwoven polymeric material to be made of fiber and do not contain titania in fact, fabric is contacted with disk, and move fabric or disc with respect to other fabric or disc, to form texture in disc surface.
This method can be included in the step of introducing fluid such as lapping compound/lubricant slurry between disk and the fabric.Provide fabric as having the recording strip that is less than or equals about 0.02 Denier, be preferably about 0.01-0.02 Denier.
This fabric is to be formed by nylon and polycarbamate with about 1: 1～about 3: 1 ratios.
This method be included in rotating disc sheet in the plane of rotation and with the plane of Plane of rotation coplane in the disc that swings back and forth.In the plane parallel with Plane of rotation along rectilinear direction moving recording band.
By following detailed and appended claim, these and other feature and advantage of the present invention will become clear.
Brief description of the drawings
For various equivalent modifications, after browsing following detailed and accompanying drawing, benefit of the present invention and advantage will become clear easilier.
Fig. 1 is the schematic representation of apparatus that is used for forming in metal storage medium panel surface texture, and it has shown according to the present invention the fabric of principle.And
Fig. 2 is used for comparison to contain and do not contain TiO at the recording strip fiber
2The OSA of various materials and the result's of Ra Denier value diagram.Wherein, the OSA value representation is from the upwardly extending big bar of X-axis, and the Ra value representation is usually the blockage on the OSA value.
The detailed description of invention
Though the present invention allows various forms of embodiments, but show among the figure and will describe at present preferred embodiment subsequently, the preferred implementation of these demonstrations and description is interpreted as of the present inventionly openly being considered to example of the present invention, and is not to limit the invention in specific implementations described herein.
Will be further understood that for this division header of instructions promptly " detailed description of invention " relate to the requirement of United States Patent Office (USPO), and do not mean that or thinking and limiting theme disclosed herein.
A kind of additive-free form of texture fabric is the nylon fiber fabric of no titania.This fabric reduces the main cause of (having eliminated in fact) medium cut widely, and this belongs to the contribution of fiber.The fiber of use standard, more the cut of substandard can not or have the huge available recording capacity that this result is higher yield and Geng Gao that obtains difficultly.It is to form texture that those skilled in the art will identify (storage medium) panel surface, and this panel surface has the standard of a control " cut " on the degree of depth, width and density.Although term cut used herein is relevant with texture, but it is not cut itself that those skilled in the art will recognize texture, and cut (its for do not expect) is darker and more at random than texture, and texture is a more common surface phenomena and can shape pattern and control.
Have been found that the prepared fabric of no titania between the 0.01-0.02 Denier has shown surprising low cut than the fabric that contains titania accordingly.Also find simultaneously, show by nylon and the formed fabric of polycarbamate and be used for media discs and make necessary structure or physical stability.This fabric that is used for texture has and is about 50/50 to about 75/25 the nylon ratio to polycarbamate, and this ratio provides moderately stable fabric.Other ratio also within the spirit and scope of the present invention.
The texture of disc is to realize with device 10, and the device shown in Fig. 1 for example wherein, will coil 12 and contact with fabric 14, coil like this 12 and fabric 14 between relatively move.In this was arranged, dish 12 was to contact with the fabric recording strip, so that relatively moving between dish 12 and recording strip 14 is that (shown among the figure 16) and swing back and forth (shown among the figure 18) are moved in rotation.That is to say that dish 12 is around A
12Axle rotates (advance figure and publish picture), axle also move with the same level on the plane of rotation 16 in swing back and forth 18.Simultaneously, fabric 14 (forming the part as the recording strip among the figure) moves shown among the figure 20, and 24 supply with so that recording strip 14 moves continuously from supply volume 22 to take-up reel.
Except that dish 12 and the relatively moving of recording strip 14 (fabric), fluid (as the slurries of 26 common indications among the figure) can from slurries supply 28 be incorporated into the dish 12 and recording strip 14 between positions, with influence texture (as influencing the roughness of dish 12) and reduce to coil 12 and magnetic recording tape 14 between friction.The slurries 26 that use are lapping compound and lubricant at present.
Fig. 2 is the diagram of overall average cut (Ra) that contains and do not contain the various Denier fiber fabrics of titania, and wherein d represents Denier.OSA representative (is compared) location, counting and measurement from the teeth outwards and is not expected that the level of cut (is every disk overall average cut with institute conceivable texture, OSA) optical surface analyzer (existing use be Candela Model 5100 and other), it is represented as Ra (TMS): Ra is the mean value that statistics draws, in medium production, be used for measuring degree of roughness or opposite smooth finish, (long measure equals 10 typically to be expressed as
-10Rice), representative " roughness average ".The expectation level that it will be appreciated by those skilled in the art that desired disc roughness depends on the kind and the conceivable storage volume of the material (metal) that some factor for example is used to form disc, and the common roughness levels that provides is desired " band (band) ".TMS is the device that uses in test.Now the device of Shi Yonging is the Model TMS2000-RC by the preparation of Schmitt Measurement Systems company, and what this device used is the program of noncontact, its objective is in order not hinder the surface.
As from the result, seeing, and comprise TiO
2Identical materials (the OSA value is respectively about 444 and 339) compare, the fabric of 0.02 and 0.015 Denier has shown still less the cut (the OSA value is respectively about 174 and 144, each disk overall average cut) of ground that makes one notice.When 0.01 Denier, contain TiO
2Material than the TiO of no fabric
2Shown lower overall average cut (about 65 pairs about 145), this is considered to cause reducing cut owing to the fabric of lower Denier value.
Whether all patents that herein relate to are quoted with the form of list of references, no matter clearly do like this in the present invention is open.
In the present invention was open, " one " was believed to comprise odd number and plural form.On the contrary, any form of quoting plural number comprises singulative (if being fit to).
From as can be seen above-mentioned, under true spirit that does not depart from novel concept of the present invention and scope, many improvement and variation can both realize.Any restriction that should be appreciated that the specific implementations aspect of relevant explanation all is can not mean or infer out that disclosed in this invention being intended to covers the modification that all fall into claim scope of the present invention by appended claims.
Claims (16)
1. a fabric that is used to form the storage media disk texture part is characterized in that, this fabric comprises nonwoven by fibroplastic polymeric material, and does not contain titania in fact.
2. fabric according to claim 1 is characterized in that, this fabric forms has the Denier that is less than or equals about 0.02.
3. fabric according to claim 1 is characterized in that, this fabric forms the Denier with about 0.01-0.02.
4. fabric according to claim 1 is characterized in that, this fabric is to be formed by nylon and polycarbamate.
5. fabric according to claim 4 is characterized in that, the ratio that this fabric contains nylon and polycarbamate is about 1: 1 to about 3: 1.
6. fabric according to claim 5 is characterized in that, this fabric forms the Denier with about 0.01-0.02.
7. one kind is used for the method that metal storage medium panel surface forms texture, it is characterized in that this method may further comprise the steps:
The fabric that does not contain titania in fact that forms from nonwoven polymeric material is provided, and this polymeric material is to be formed by fiber;
Fabric is contacted with disc; And
Move fabric or disc with respect to other fabric and disc, to form texture in disc surface.
8. method according to claim 7 is characterized in that, this method comprise with a kind of fluid be incorporated into the dish and fabric between.
9. method according to claim 7 is characterized in that this fabric provides as recording strip.
10. method according to claim 7 is characterized in that, this fabric forms has the Denier that is less than or equals about 0.02.
11. method according to claim 1 is characterized in that, this fabric forms the Denier with about 0.01-0.02.
12. method according to claim 1 is characterized in that, this fabric is to be formed by nylon and polycarbamate.
13. method according to claim 12 is characterized in that, the ratio that this fabric contains nylon and polycarbamate is about 1: 1 to about 3: 1.
14. method according to claim 13 is characterized in that, this fabric forms the Denier with 0.01-0.02.
15. method according to claim 7 is characterized in that, disc is to rotate in Plane of rotation, and with the plane of Plane of rotation coplane in swing back and forth.
16. method according to claim 15 is characterized in that, recording strip is that straight line moves in the parallel plane of Plane of rotation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56788704P | 2004-05-04 | 2004-05-04 | |
| US60/567,887 | 2004-05-04 | ||
| US11/047,035 | 2005-01-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1938761A true CN1938761A (en) | 2007-03-28 |
| CN100472611C CN100472611C (en) | 2009-03-25 |
Family
ID=37955212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800096785A Expired - Fee Related CN100472611C (en) | 2004-05-04 | 2005-04-21 | Additive-free fiber for metal texture of hard disk drives |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100472611C (en) |
-
2005
- 2005-04-21 CN CNB2005800096785A patent/CN100472611C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN100472611C (en) | 2009-03-25 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090325 Termination date: 20140421 |