JPH02312079A - Recording disket or jacket for disc and manufacture thereof - Google Patents

Abstract

PURPOSE: To improve the cleanliness by forming a jacket of a thin outer layer consisting of an impact resistant plastic material and an inner liner of a powder- adhered non-woven fabric laminated on this outer layer. CONSTITUTION: The powder-adhered non-woven fabric is laminated as a linear layer on the inside surface of the material of the jacket for diskettes and disks by pin lamination, etc. The material forming the outside is a relatively thin layer of an impact resistant plastic material. A half-finished product 70 before bending and joining of the laminated jacket for diskettes has the external jacket 72 laminated with the powder adhered non-woven fabric liner 74. The jacket 72 has ends 88, 90, 92, 94 protruding from the liner 74 and is joined when the half-finished product 70 is bent. As a result, the protrusion of the fibers at the time of lamination on the cut parts of the half-finished product 70 is lessened and the cleanliness is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to jackets for diskettes or disks and methods of manufacturing them. In particular, the present invention provides nonwoven fabrics (using antistatic fibers in all or a substantial portion of the fibers, or in which all or a substantial portion of the fibers are antistatically treated, or all or a substantial portion of the fabric itself). (including cloth made by electrostatic treatment) as a liner in direct contact with a recording diskette or disk;
The present invention relates to a cassette, jacket or cartridge for holding flexible rotating magnetic recording diskettes or disks (also known as "floppy" diskettes or disks).

BACKGROUND OF THE INVENTION Floppy diskettes or disks are used to later access and retrieve information by a computer transducer. These are stored in diskette or disc jackets or cassettes.

Typically such a jacket comprises a porous, low-friction material, preferably antistatic, that protects the magnetic recording surface of the diskette or disk from damage and contamination by dust and other particulate matter during storage, handling, and use. It is lined with material. Such a liner also removes contamination from the magnetic recording surface of the diskette or disk while the information stored thereon is being accessed by a computer.

Nonwovens that are bonded by heat fusing the individual fibers at their intersections, and nonwovens that are bonded by applying a liquid adhesive, such as a natural or synthetic polymer latex or emulgitane, to the fibrous mat or web. (including nonwoven fabrics mixed with antistatic agents) have been found useful as diskette or disk jackets or cartridge liners.

In the prior art, disclosures about jackets or cartridge liners for diskettes or discs can be found in the following documents: US Pat.
et al. disclose a diskette jacket or cartridge having an inner layer of "porous, low-friction, antistatic material." However, it does not disclose the preformed nonwoven fabric (2nd m, 7th m).
(See lines 2 to 3, line 17).

U.S. Pat. (A-2, column 3, lines 30-36) discloses a diskette or disk jacket or cartridge lined with an "engaging liner" (A-2, column 3, lines 30-36).

U.S. Pat. No. 3,864,755 [issued February 4, 1975, Hargis] discloses a "synthetic nonwoven wiping layer that provides a low friction, antistatic surface" of a bonded diskette jacket or cartridge liner. Discloses the configuration (No. 21111.Second
~See lines 5). The wiping layer is disclosed as being "made of a porous, low-friction, antistatic material" (Second @,
Lines 63 and 64 (“synthetic non-woven fabric”), column 3, 3
lines 6-44).

U.S. Patent Nos. 4,586,606 and 4,610,352
issue [May 6 and September 9, 1986, Howey and Howey et al.] as a diskette jacket or cartridge liner.
Discloses a structure using a special nonwoven fabric bonded by heat (for example, No. 4586606, column 1, 5
-9th line and 25th-43rd line, 2111. 55th to 6th
Line 5, 511° Lines 6-9 and 7ilI, 7-
(See line 24).

U.S. Pat. No. 4,251,843 (issued Feb. 17, 1981, Masuyama et al.) discloses an improvement to ``a conventional disk jacket with a fibrous layer, such as a nonwoven fabric, on the inner surface to protect and clean the disk surface.'' The jacket is disclosed (column 1, lines 31-34). Non-woven fabric is [
Made from nylon (polyamide), polyester, viscose rayon, cellulose acetate, polypropylene, acrylic resin, alkyl acrylate copolymer, etc.
A binder is mixed to make it into a nonwoven fabric. Non-woven materials are fibrous products made of fibers (said fibrous materials) arranged in webs or mats made by conventional methods and then coated with natural latex, e.g. natural rubber latex, synthetic latex. using adhesives such as or in combination with urea resin or melanin resin adhesives,
Alternatively, for example, when polyethylene, polypropylene or polyamide is used, the adhesive force of the fibers themselves is used to adhere the fibers. Among synthetic latexes, acrylonitrile-butadiene copolymers and acrylonitrile are preferred, with synthetic latexes having a molecular weight of about 800 to 10,000 being most preferred." (Column 1, lines 60 to 34I1)
, line 8).

U.S. Patent No. 425T843 discloses an improved method comprising incorporating an anionic, cationic, or nonionic antistatic agent into a nonwoven fabric to prevent static charges from forming on the nonwoven fabric (No. 41. 21-30
(see row and column 6, lines 42-50).

A cartridge or shroud for a diskette "manufactured by combining a layer of porous fibrous, low friction, antistatic material with a layer of solid material" is disclosed in U.S. Pat. No. 4,354,213 [IO, 1982] Martinelli, column 1, lines 17-19]. According to U.S. Pat. No. 4,354,213, [generally, porous fibrous, low friction, antistatic liner materials are
Manufactured by gluing loose synthetic fibers together. Within the range of materials produced by said methods, two types are commonly used as liner materials for floppy disks: materials with different fiber compositions and materials with the same composition in different ways. The former is rayon fiber 7
0-80% and 30-20% polypropylene fibers. Polypropylene fibers have a lower softening point than rayon fibers. Therefore, such loose fiber blends are typically bonded together by forming a cohesive layer by heating to a temperature at which the polypropylene fibers soften and adhere to each other or to the rayon fibers. Next, the obtained material is cooled. The latter material used in floppy disk liners is made entirely of polyester fibers. This type of fiber is formed into a cohesive layer by applying a liquid binder solution containing polyester and a catalyst, among other substances, to the loose fibers. Additionally, the fiber coating material is further treated to polymerize certain components of the binder solution, thereby creating a cohesive layer of bonded fibers comprising 93% polyester fibrous and about 7% polyester terpolymer binder. arise.

The polyester terpolymer binder is formed by polymerization of polyester molecules contained in a binder solution applied to the loose fibers. ” (column 1,
Lines 24-51).

An overview of the technique is given by Petkie-W.
icz), ``Nonwoven as liners for floppy disks''
s asL 1ners for F Iopp
y D 1sks”) J, Non Woven Zoo '7-
Nonwovens World, 19
Seen in May-June 1986, pages 120-124.

The types of nonwoven fabrics mentioned by the author as liners for floppy disk jackets include "thermally bonded rayon/polypropylene,""chemically bonded rayon/polyester (acrylic resin),""chemically bonded rayon (S-R)," and "thermally bonded Polyester” (Table 2, page 123).

[Problems to be Solved by the Invention] The present invention seeks to provide a new diskette, disk jacket, or cartridge, and a method for manufacturing the same.

The present invention also provides a new diskette or disk jacket or cartridge lined with a specific nonwoven fabric.

Furthermore, the present invention provides a method for manufacturing diskettes, disk jackets, or cartridges lined with a specific nonwoven fabric, which significantly increases the manufacturing throughput of semi-finished products used for manufacturing diskettes, disk jackets, or cartridges. It is an object of the present invention to provide an improved method and an improved jacket in which a liner is laminated to the outer layer material of the blank cut out of the jacket or cartridge.

These and other objects of the invention, as well as its nature,
The scope and utilization will be readily apparent to those skilled in the art from the following description, drawings, and claims.

SUMMARY OF THE INVENTION Powder-bonded nonwoven fabrics (preferably, but not necessarily, antistatic fibers) are used as liners in jackets or cartridges for conventional diskettes or discs manufactured by conventional methods. If all or a substantial part of the fibers of the powder-bonded nonwoven fabric or all or a substantial part of the nonwoven fabric itself is subjected to antistatic treatment, conventionally used nonwoven fabrics, For example, compared to the throughput achieved when thermally bonded nonwoven fabrics are used as diskette or disk jackets or cartridge liners,
The manufacturing throughput of blanks used in the manufacture of diskette or disk jackets or cartridges can be effortlessly increased.

In addition, if the powder-bonded non-woven fabric used as a diskette or disc jacket or cartridge liner is a non-woven fabric in which antistatic fibers are used for all or a substantial portion of the fibers of the powder-bonded non-woven fabric, or The manufacturing throughput of blanks used in the manufacture of diskettes or disc jackets or cartridges can be significantly increased if all or a substantial part of the fibers or the nonwoven fabric itself is antistatically treated. . When a powder-bonded nonwoven fabric (with or without antistatic fibers or cloth) is used as a liner for a diskette or disk jacket or cartridge, the material that is cut out of the diskette or disk jacket or cartridge may be Lamination and cleanliness (reduced fiber protrusion at cutout 17) can also be improved.

The nonwoven fabric used in the present invention is prepared by carding the fibers, then secondary forming the carded fibers, preferably drying them on a conveyor (dry-1a-ying),
It is manufactured by applying and sprinkling powdered adhesive onto the resulting layered web. The fibrous web then passes through a heating section to soften or melt the adhesive particles and then through a compression section to bring the fibers into greater contact with the molten or softened adhesive. The resulting material is then cooled to solidify the adhesive, thereby bonding the fibers at all points in the fiber matrix.

The technology for producing a single-layer powder-bonded nonwoven fabric is as follows: 1. known (for example, Mayer et al., “Production on Laminates and Nonwovens”).
Pie Powder Bonde 2f (“Pro-duet”)
ion of Lam1nates and
Nonvovens by Powder Bon
ding") J, Inside-'85-Advanced
Forming/Bonding Conference (INS
IGHT '85 Advance-ced For
ming/Bonding Conference)
, October 27-29, 1985, Toronto, Canada). The manufacture of powder bonded nonwoven fabrics suitable for use in the practice of the present invention will now be described with reference to the manufacturing process illustrated in FIG.

The manufacturing process comprises a coarse conveyor belt 20 driven in the direction indicated by arrow A between rollers 22,24. One or more cards (shown as one device 26) are provided for depositing a fibrous web or -28 onto the top surface of the conveyor belt 20. Polyethylene, polypropylene, rayon, acrylic, commonly used in the production of non-woven fabrics, such as Orion
- polyacrylonitrile fibers, nylon, e.g. nylon 4.6.6/6 or 6/12 fibers, polyester,
For example, Fortrel, Dacron (D
aeron) or Kodel-polyethylene terephthalate fibers, carbon/graphite fibers, such as carbonized nylon or carbonized acrylic fibers, and hybrids of such fibers, such as nylon/polypropylene hybrids; Any fiber may be used. Conductive fibers and fibers with deformed cross-sections, such as circular, trilobal, human-shaped, Y-1H-
It is also possible to use fibers having a 1-square cross section.

Approximately 1.0 to 6.0 denier, average staple length approximately 37
Particularly preferred are polyester stable fibers that are 4 to 21/7 inches.

Antistatic fibers with antistatic properties in the fibers themselves or in the fiber material, e.g. synthetic polymers, fibers prepared from these fibers, and powder adhesives applied before or after being placed on the conveyor belt 20 treated with antistatic treatments, including conventionally used anionic, cationic, nonionic or amphoteric antistatic treatments, by any of the methods such as spraying, saturation printing, forming, coating. The fibers are used to make the powder bonded nonwoven fabrics used in the practice of this invention.

The fibrous layer or web 28 passes through a web developing section 30 and is then conveyed to a section where the web is spread with powdered adhesive. This compartment is shown as a powder distribution device 32 (
In practice, several such devices are used). A suitable powder spreading device is a powder spreader of the known type, which is a wire roller which feeds the powder into the interstices between the wires, the rotation of which causes the powder to fall from the interstices onto the web passing beneath it. It is. A screw 34 is provided to raise and lower the rollers of the powder distribution device 32. A catch pan 36 is provided to receive excess powder falling through the rough conveyor belt 20.

The collected powder is recycled.

Of course, as an alternative powder spreading device, fluidized air
Other devices such as sprays or electrostatic atomizers, devices capable of applying the powder as a liquid or in the form of a foam may also be used.

The powder adhesive has a lower melting point than the fibers of the web. Generally the adhesive is a thermoplastic material and is capable of forming a good adhesive bond with the fibers used.

For polyester fibers, polyester adhesives such as Eastman Chemical Products
Chemical Products) as a hot melt adhesive [East Bond ("E
Particular preference is given to using the polyester powder commercially available under the name "astobond" (trademark). Typical polyester adhesives have a melting point of 100-130°C and a coarse powder (200-420 microns or 70-4
0 US standard mesh: L), intermediate powder (80~
200 micron or 200-70 US standard
mesh), fine powder (less than 80 microns, or 200 microns)
Available as US Standard Metsch).

Preference is given to using intermediate powders for mechanical dispersion. The amount of adhesive applied to the web is typically about 5% of the total weight of the nonwoven.
-50%, preferably about 10-20%.

The fiber layer or web 28 sprinkled with powder adhesive is transferred from the conveyor belt 20 to another conveyor belt 38, for example a fiberglass conveyor belt coated with Teflon (polytetrafluoroethylene). Conveyor belt 38 is driven between rollers 40 , 42 in the direction indicated by arrow B and conveys fibrous web 28 to infrared oven 44 . In oven 44, the powdered adhesive melts and adheres to the fibers of web 28 at the intersections where the fibers and adhesive meet.

Upon exiting the furnace 44, the web 28 -nip rolls 46
is lightly compressed by

The strength of the web material can be improved by reheating. Accordingly, the web 28 processed by the nip rolls 46 is transferred to another conveyor belt 48. Conveyor belt 48 is running in the direction indicated by arrow C between rollers 50,52. Upon contact with conveyor belt 48 , web 28 is conveyed past lightweight rollers 54 . The web 28 is then transferred to the second infrared furnace 5
6 and then nip rolls 58
further compressed by Nip rolls 46 and 58 are heated during start-up, but are then generally cooled during operation. Rollers 40.42 and 50.52 are water cooled to prevent them from getting too hot due to the transfer of heat from infrared furnaces 44 and 56. The resulting web 28 is then further cooled by passing through a water-cooled drum 60,62 or by air cooling. The web 28 is then wound onto rolls on a winder 64 and slit to a usable width (not shown).

Suitable oven temperatures depend on the powder adhesive used and can be determined by simple tests or from literature provided by the powder adhesive supplier.

However, typically the temperature of the infrared furnaces 44 and 56 is 8
It is in the range of 0 to 200°C. The temperature of web 28 exiting infrared ovens 44 and 56 is sensed, for example, by infrared thermometers 66 and 68.

Of course, infrared ovens 44 and 56 may be replaced by other heating devices, such as calenders, hot air ovens, steam presses and thermal contact drums with non-stick surfaces. The residence time of the web 28 in each oven is determined by achievable process speeds and other factors, but is typically 20 seconds to 2 minutes.

The pressure exerted by nip rolls 46 and 54 depends on the material used, the desired properties of the web (no diskette or disc wear, low foreign material, etc.).
Compressibility, wiping uniformity, high surface area and low torque values are particularly important properties), determined by manufacturing process conditions, but pressures of up to about 20 to 9 per roll surface width IC are typically used.

In the practice of the present invention, powder bonded nonwoven fabrics can be applied to diskette or disc jackets or cartridges by conventional lamination methods, such as pin lamination using various bin patterns, heat and pressure lamination, or a combination of the two. The liner is laminated as a single layer to the inner surface of the material forming the exterior of the material. The material forming the exterior is typically a relatively thin layer (layer thickness: about 0.010-0.050 inches) of a high-impact plastic material, such as a vinyl plastic material such as polyvinyl chloride. Betskievich's article (p. 122) discusses methods of manufacturing lined diskettes or disk jackets that are currently in common use: ``In recent years, methods of manufacturing floppy disks have changed from individual assembly There has been a change to continuous manufacturing.The most recent change is from continuous "in-line" manufacturing to what is now known as "transverse" manufacturing. This means that attempts have been made to increase machine throughput simply by changing the process layout of laminating the liner to the jacket material.

FIG. 3 (of the Betskievich reference) schematically shows the continuous lamination of a nonwoven fabric onto a jacket material. The manufacturing process is divided into two main steps (magnetic media manufacturing, jacket assembly). [Production of a floppy disk jacket involves laminating a polyvinyl chloride (PVC) jacket with a nonwoven lining fabric. Currently, the most widely used continuous lamination equipment uses PVC to remove the internal stress of PVC.
The sheet is placed in the decurling chamber ("decurl").
The nonwoven liner is fed into a rotating die where it is cut to the required length.

The liner cut by the die is then fed onto the PVC sheet by a moving roll.

This process requires precise placement of the liner on the PVC sheet. This can be accomplished by using a static eliminator to remove static electricity from the nonwoven liner and simultaneously using a static electricity generator to statically charge the PVC sheet. In this way the liner is held in the correct position.

The liner is then laminated to the PVC sheet and the laminate is cut and punched into planar members. Then fold this part and
Join the ends.

At this point, the magnetic media or floppy disk is placed into the folded jacket. ``The final step in the manufacture is to fold and join the jacket in an end folding machine (see Becky Vicci, Figure 3, page 122).'' Typical Laminated Diskette Jacket Made in accordance with the Invention FIG. 2 shows the blank product before bending and joining, with the nonwoven fabric liner facing upward. Blank 70 has an outer jacket 72 laminated with a powder bonded nonwoven liner 74 .

The large circular holes 76 and 78 accommodate the drives of a computer disk drive when the blanks are folded and stacked along line 70 with the liner inside.
This will be the center hole for the hub. If a powder-bonded nonwoven fabric is used as the fabric liner 74 of the diskette jacket blank 70, the liner 74 when folded along the l-1 line
and outer jacket 72 is better than results achieved with conventionally used nonwoven fabrics. The oval holes 80.82 then form the transducer holes (or diskette read slots) in the diskette jacket, and the small circular holes 84.86 form the diskette jacket sectors (
form a hole for the index). The outer jacket 72 of the blank 70 has four ends 88, 90, 92 and 94 that extend beyond the ends of the nonwoven liner 74. These protruding ends were folded together so that the blanks 70 were folded and overlapped along the 1-1 line with the liner inside, and a floppy disk (not shown) was inserted into the diskette jacket. At this time, it is folded to join the ends of the diskette jacket.

The test was carried out as follows: ■ 00% polyethylene terephthalate staple fibers having an average denier per filament of 1°5 and an average stable length of 1'/, inch.
A thermally bonded antistatic nonwoven fabric (width: 5.1 inches, thickness: 20°065 inches) consisting of polyester fibers was thermally point bonded and subjected to antistatic post-treatment (type: 149- 007, Kendall (K
100% containing special antistatic polyethylene terephthalate stable fibers having an average denier per filament of 1°5 and an average staple length of t”/+6 inches. A powder-bonded nonwoven fabric (width: 5°1 inch, thickness: 0.065 inch) consisting of polyester was prepared as described above using Eastbond 252 intermediate polyester powder and was prepared as described above in the Petskievich reference, supra, p. 122. Bernard (Bernard) described in
al) method, a sheet of polyvinyl chloride (width: 6 inches, thickness: O, O 14 inches) [Hoechst
hst)] were laminated. The same pin pattern was used in each run during lamination.

The heat-adhesive antistatic polyester nonwoven liner (1) is passed through the process at a rate of 108 parts per minute;
On the other hand, the powder-bonded antistatic polyester nonwoven liner (2) has a processing speed of more than 162 parts per minute [
Approximately 50% of the manufacturing throughput achieved using liner (1)
% increase] in the process.

As mentioned above, the present invention provides for the cut-out portions of diskette or disk jacket blanks thus produced (large circular holes 76, 78 in blank 70 shown in FIG. Provides a jacket with improved cleanliness with respect to lamination into holes 80.82 and small circular holes 84.86) and as evidenced by reduced fiber extrusion into cutouts. Extrusion of fibers into the read slot of a diskette or disk results in read/write errors. Diskettes or disc jackets lined with powder bonded nonwoven fabrics prepared in accordance with the present invention are individually smaller compared to nonwoven liners bonded by other methods, such as those using heat bonded nonwoven fabrics. It also has a more widely distributed adhesive area and a larger number of adhesive sites.

This is a photomicrograph of powder-bonded polyethylene terephthalate nonwoven fabric (magnification +48.1x, 102x and 300x).
Micrographs (magnifications near 0 and 200 ) with the adhesive structure shown in Figures 6 and 7 (Figures 6 and 7 are reproduced from Nonwoven World, May-June 1986, p. 51). ).

This smaller and more widely distributed adhesive area and more adhesive sites significantly reduce the possibility of free fibers remaining in the cut blank after cutting. In addition, the heat generated when punching a hole in a diskette or disk jacket blank made using powder-bonded nonwoven fabric as a liner material can easily melt the edges of the fabric at the cutout, resulting in a rough cut. Improves fiber entanglement.

The foregoing discussion of the invention leads directly to preferred embodiments and embodiments. It will be readily apparent to those skilled in the art that changes and modifications may be readily made in carrying out the concepts described herein without departing from the spirit and scope of the invention as defined by the claims.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a manufacturing process of a powder-bonded nonwoven fabric suitable for carrying out the present invention. FIG. 2 shows a diskette jacket blank with the nonwoven liner on top, prior to folding and edge joining. 3 to 5 are micrographs (magnifications of 48.1 times, 102 times, and 300 times, respectively) showing the shape of the fibers of the powder-bonded polyethylene terephthalate nonwoven fabric. FIGS. 6 and 7 are micrographs (magnifications: 70x and 200x, respectively) showing the shapes of fibers of heat-adhesive polypropylene and heat-adhesive polyethylene terephthalate nonwoven fabrics. 20.38.48...Conveyor belt, 22.24
．． 40.42.50.52... Roller, 28... Fiber web, 30... Expanding section, 32... Powder scattering device, 34... Screw, 36... Receiving plate, 44.5
6... Infrared furnace, 54... Light roller, 46.58... Nip roll, 60.62... Water-cooled drum, 64... Winder 66
．． 68...Infrared thermometer 70...Semi-finished product, 72...External jacket, 74
...Liner, 76.78...Circular hole (large), 8
0.82...Oval hole, 84.86...Circular hole (small), 88.90.92.94...Edge patent applicant Bonner Fabric Corporation agent Patent attorney Above 2 FIG+ 3 procedure amendment written on Fl by 葆 and 1 other person) September 28, 1999

Claims (1)

Claims: 1. A jacket for holding a flexible rotating magnetic recording diskette or disk comprising a relatively thin outer layer of high impact plastic material and an inner liner of powder bonded nonwoven fabric laminated to the outer layer. 2. A jacket for a diskette or disk according to claim 1, wherein said outer layer comprises a vinyl plastic material. 3. A diskette or disc jacket according to claim 2, wherein said vinyl plastic material is polyvinyl chloride. 4. The diskette or disk jacket according to claim 1, wherein the powder-bonded nonwoven fabric contains polyester fibers. 5. The diskette or disk jacket according to claim 1, wherein the powder-bonded nonwoven fabric contains antistatic polyester fibers. 6. The jacket for a diskette or disk according to claim 1, wherein the powder-bonded nonwoven fabric contains polyester fibers and fibers which are all or substantially partially treated with antistatic treatment. 7. A jacket for a diskette or disk according to claim 1, wherein said powder-bonded nonwoven fabric contains polyester fibers and said fabric is treated in whole or in substantial part to be antistatic. 8. A jacket for holding a flexible rotating magnetic recording diskette or disk comprising a relatively thin outer layer of polyvinyl chloride and an inner liner of powder bonded nonwoven fabric laminated to the outer layer. 9. A jacket for holding a flexible rotating magnetic recording diskette or disk comprising a relatively thin outer layer of polyvinyl chloride and an inner liner of powder bonded nonwoven antistatic polyester laminated to the outer layer. 10. Laminating a powder-bonded nonwoven fabric onto a relatively thin layer of impact-resistant plastic material, cutting a blank from the resulting laminate, punching appropriate openings in the blank, and processing the blank. A method of manufacturing a jacket for holding a flexible rotating magnetic recording diskette or disk comprising the steps of folding the article and joining the edges. 11. The method according to claim 10, wherein the powder bonded nonwoven fabric contains polyester fibers. 12. The method of claim 10, wherein the powder bonded nonwoven fabric contains antistatic polyester fibers. 13. The method of claim 10, wherein the powder-bonded nonwoven fabric contains polyester fibers and fabric fibers that are all or substantially partially antistatic treated. 14. The method of claim 10, wherein the powder bonded nonwoven fabric contains polyester fibers and the fabric is treated in whole or in substantial part with an antistatic treatment. 15. The method of claim 10, wherein said plastic material is a vinyl plastic material. 16. The method of claim 10, wherein the plastic material is polyvinyl chloride. 17. An improved method of manufacturing a jacket for holding a flexible rotating magnetic recording diskette or disk comprising laminating a powder bonded nonwoven to a relatively thin layer of high impact plastic material. 18. The method of claim 17, wherein the powder bonded nonwoven fabric contains polyester fibers. 19. The method of claim 17, wherein the powder bonded nonwoven fabric contains antistatic polyester fibers. 20. The method of claim 17, wherein the powder-bonded nonwoven fabric contains polyester fibers and fabric fibers that are all or substantially partially antistatic treated. 21. The method of claim 17, wherein the powder bonded nonwoven fabric contains polyester fibers and the fabric is treated in whole or in substantial part with an antistatic treatment. 22. The method of claim 17, wherein the plastic material is a vinyl plastic material. 23. The method of claim 17, wherein the plastic material is polyvinyl chloride. 24. An improved jacket for holding a flexible rotating magnetic recording diskette or disk comprising an outer layer and an inner layer bonded to the outer layer, the inner layer being a powder bonded nonwoven fabric. 25. The jacket for a diskette or disk according to claim 24, wherein the powder-bonded nonwoven fabric contains polyester fibers. 26. The jacket for a diskette or disk according to claim 24, wherein the powder-bonded nonwoven fabric contains antistatic polyester fibers. 27. The jacket for a diskette or disk according to claim 24, wherein the powder-bonded nonwoven fabric contains polyester fibers and fibers that are all or substantially partially antistatic treated. 28. The diskette or disc jacket of claim 24, wherein said powder-bonded nonwoven fabric contains polyester fibers and said fabric is treated in whole or in substantial part with an antistatic treatment.