JPH0636297B2 - Disc jacket manufacturing method - Google Patents

Description

The present invention relates to a jacket for covering a disk such as a floppy disk jacket, a compact disk jacket and a video disk jacket, and a method for manufacturing the same.

[Conventional technology]

As is already known, disk jackets such as floppy disks rapidly increase with the number of floppy disks as the number of computers increases. At present, the jacket of this floppy disk is mainly made of polyvinyl chloride sheet with conductivity added, and 1 part of ABS (acrylic butadiene styrene copolymer) is also used. Similarly, conductivity is imparted. Further, a non-woven fabric is heat-bonded inside the jacket to protect the floppy disk. That is, the form is as shown in FIG. Most floppy disks are 3.5 inches x 5 inches.
There are two types of jackets for this floppy disk, one manufactured from a sheet as shown in FIG. 1 and one molded by injection. In either method, the nonwoven fabric for protecting the floppy disk is in a donut shape. It is a cut-out piece that is stuck together.
However, at present, it is very time-consuming to bond the non-woven fabrics together, and the complexity of the process further increases the cost of the jacket.
Further, the conventional specifications have a drawback that the display effect and the functionality cannot be sufficiently imparted.

[Problems to be solved by the invention]

The present invention can improve the above-mentioned drawbacks of the conventional disc jacket and the manufacturing method thereof, simplify the manufacturing process and reduce the cost, and can sufficiently provide the display effect and the functionality.

Structure of the Invention [Means for Solving Problems] The present invention provides a film having a nonwoven fabric or a woven fabric on one surface of at least one or more layers, and a printing or embossing film on the other surface of the sheet. One of a method of manufacturing the disc jacket and a method of manufacturing the disc jacket, wherein the non-woven fabric surface or the woven fabric surface is punched into a required shape in a state of being the inner surface of the disc jacket. is there.

That is, the present invention is a method of molding from a sheet when manufacturing a floppy disk jacket. At the same time, for example, printing or embossing is performed on the sheet surface opposite to the surface on which the nonwoven fabric or the woven fabric is thermally laminated during film formation. The process is simplified and the cost is reduced by thermally laminating a film having functions such as "nonwoven fabric or woven fabric / extruded sheet / functionality-imparting film" to form a three-layered sheet. At the same time, a display effect and functionality can be imparted.

Next, the manufacturing method and the floppy disk jacket will be specifically described.

A method of thermally laminating the above-mentioned non-woven fabric or woven fabric and a sheet processed by printing or the like will be described. Resins generally used as a sheet material for extrusion film formation include olefin resins such as polyethylene and prepropylene, and also include polystyrene, acrylic butadiene styrene copolymer, acrylic styrene copolymer, and polyvinyl chloride. All thermoplastic resins are effective. In addition to carbon black and graphite, iron, stainless steel, copper, chromium, titanium,
Metal particles such as tungsten, boron, nickel, cobalt, aluminum, zinc and nichrome, metal plated non-metal particles, stannic oxide, silver oxide, metal fosker,
It is possible to mix a carbon fiber or glass fiber with a metal coating material or the like. When a thermoplastic resin containing these is extruded from a T-die into a sheet-shaped molded product, a nonwoven fabric or a woven fabric and a sheet treated by printing or the like are heat-laminated at the same time. This step is shown in FIG. As shown in FIG. 2, the resin extruded from the die is heat-bonded while passing through the rolls 9, 10 and 11 by thermally laminating a non-woven fabric or a woven fabric and a sheet subjected to a treatment such as printing. At this time, by appropriately widening the interval between the rolls 9 and 10, it is possible to prevent the sheet 4 and the non-woven fabric or the woven fabric 2'and the film 5 on which printing or embossing has been applied from curling due to thermal lamination.

Further, if necessary, take the final sheet 14 as a sheet,
At about 60 to 100 ℃, you may take measures such as stacking sheets and aging them to remove sleds.

As the film 5 which is printed or embossed, a film printed with "a frame in which various patterns, continuous patterns or information necessary for storage of floppy disks can be written" is printed, and further, the printed film is embossed. A sheet, a metal vapor-deposited sheet, or a laminated film obtained by pasting a metal foil such as an aluminum foil, a copper foil, a silver foil, or a gold foil, or a single layer film or a laminated film thereof having conductivity is used. . As a non-woven fabric,
Cotton, rayon, acetate, polyester fiber, nylon, polypropylene, vinylon, and other acrylic fibers are arranged in a web (thin cotton) or mat shape by an appropriate method, and the fibers are joined together by the adhesive or the fusion force of the fibers themselves. A sheet-shaped product obtained by the above is used.

As the woven fabric, a woven fabric of fibers such as cotton, rayon, acetate, nylon, polyester, vinylon, polyvinyl chloride, polypropylene, and saran based on plain weave, twill weave, and sushi (satin) weave is used. .

The sheet thus prepared is drawn out into a shape as shown in FIG. 1 and a floppy disk is put therein and then packaged.

[Work]

The present invention, when manufacturing a floppy disk jacket, in a method of molding from a sheet, at the same time the reverse sheet surface for thermal laminating a nonwoven fabric or a woven fabric at the time of sheet film formation, for example, a film having a function such as printing or embossing is provided. By thermally laminating a non-woven fabric or woven fabric / extruded sheet / functionality-imparting film, a sheet having a three-layer structure is prepared.
In addition to simplifying the process and reducing the cost, the display effect and the functionality can be added.

〔Example〕

Example 1 20% by weight of carbon black was mixed into polypropylene, and masterbatch pellets were extruded with a normal extruder and sheeted with a T-die. The thickness of the sheet is 0.15 mm. At the same time, as shown in FIG.
A polypropylene film 0.05 mm that had been further embossed and colored with a red pigment was thermally laminated and sheeted, and the thickness of the sheet was 0.2 mm. At the same time, take up 13 rayon + polypropylene (2
0%) non-woven fabric having a basis weight of 35 g / m ² was thermally laminated.

The volume resistivity of the inner surface of the sheet sheeted by the T-die was 10 ⁷ Ωcm. At this time, take a sheet to seat so that the sheet does not warp,
The sheet was turned up at 80 ° C. and aged to remove the sled.

The sheet thus obtained is punched into the outer shape shown in FIG. Next, the thus punched sheet is bent along the dotted line portion near the center in FIG. 1 and then punched out in the center hole. A floppy disk manufactured separately is put into the floppy disk jacket thus obtained.

After this process, the jacket performance is the same as the conventional one, and after the jacket performance is inspected, the end seal is performed, the label is attached, and the like, and then the product is shipped. Since the non-woven fabric is thermally laminated on the sheet itself, the step of applying the non-woven fabric to the sheet is simplified.

Further, since the inner surface of the disc is a non-woven fabric, the next polypropylene sheet is black, and the outermost polypropylene film has a red embossed film, the display effect is improved and it is easy for the user to use.

Example 2 Pellets prepared by mixing 20% by weight of carbon black with polypropylene into a masterbatch and polyethylene pellets were extruded with a two-layer extruder and sheeted with a T-die. In this case, polyethylene is on the roll 9 side. The thickness of the sheet is 0.2mm (each 0.1mm). At the same time, as shown in FIG. 2, a stretched polypropylene film 0.05 printed in three colors of yellow, red and eye from winding 7 0.05
mm was thermally laminated and sheeted. Further, from the winding 13, rayon fabric (basis weight: 30 g / m ² ) was thermally laminated. Here, the volume resistivity of the polypropylene surface of the sheet sheeted from the T-die was 10 ⁷ Ωcm. At this time, in order to prevent the sheet from being warped, it was taken as a sheet and taken as a warp by aging the sheet at about 80 ° C. and aging it.

The sheet thus obtained is punched into the outer shape shown in FIG. Next, the thus punched sheet is bent along the dotted line portion near the center in FIG. 1 and then punched out in the center hole. A floppy disk manufactured separately is put into the floppy disk jacket thus obtained.

After this step, the jacket performance is inspected as usual, the end seal is applied, the label is attached, and the like, and then the product is shipped. Since the woven fabric is thermally laminated on the sheet itself, the process of applying the woven fabric to the sheet is simplified.

In addition, the inner surface of the disc is woven, the polypropylene side of the following laminated sheet of polypropylene and polyethylene is black, and the outermost polypropylene is printed in three colors of yellow, red, and eye, which improves the display effect and the user. It is easy to use for

EFFECTS OF THE INVENTION The disc jacket manufactured in this manner has a significantly simplified manufacturing process, reduced cost, and a significantly improved display effect, as compared with the conventional disc jacket.

[Brief description of drawings]

FIG. 1 is a view showing the inner surface of a floppy disk jacket manufactured by the present invention or the conventional method for manufacturing a floppy disk jacket. FIG. 2 is a diagram showing a step of thermally laminating a sheet, a non-woven fabric, and a film on which printing or embossing has been performed at the same time in one embodiment of the method for manufacturing a floppy disk jacket of the present invention. 1 ... Inner surface of floppy disk jacket 2 ... Part where nonwoven fabrics are bonded together 2 '... Nonwoven fabric or fabric 3 ... Floppy disk 4 ... Thermoplastic sheet 5 ... Film with printing or embossing 6 ... Dice 7: Winding of printed or embossed film 8,9,10,11,12 ...... Roll 13: Nonwoven or woven material 14 ...... Final sheet

Claims (12)

[Claims] 1. At least one layer of a hot-melt resin is extruded into a sheet shape, and at the same time, a nonwoven fabric or a woven fabric is formed on one surface of the sheet, and a film having printing or embossing is formed on the other surface of the sheet at the same time. After that, the method for producing a disc jacket is characterized in that the non-woven fabric surface or the woven fabric surface is an inner surface of the disc jacket, and then punched into a required shape. 2. The method for producing a disc jacket according to claim 1, wherein when the sheet has one layer, the sheet is electrically conductive. 3. When the sheet has two or more layers, at least the sheet on the non-woven fabric side or the fabric side is conductive, and the other sheets are conductive or non-conductive. A manufacturing method of the disc jacket according to the first item of the range. 4. The method for manufacturing a disc jacket according to claim 2, wherein the electrically conductive sheet is made by mixing an electrically conductive substance in a thermoplastic resin. 5. The disc jacket according to claim 4, wherein the thermoplastic resin is polyethylene, polypropylene, polystyrene, acrylic butadiene styrene copolymer, acrylic styrene copolymer, polyvinyl chloride, or the like. Production method. 6. In addition to carbon black and graphite, the conductive substance is metal particles such as iron, stainless steel, copper, chromium, titanium, tungsten, boron, nickel, cobalt, aluminum, zinc and nichrome, and metal-plated non-metal. The method for producing a disc jacket according to claim 4, which is a particle, stannic oxide, silver oxide, metal phosker, carbon fiber, a metal coating material for glass fiber, or the like. 7. The method of manufacturing a disc jacket according to claim 3, wherein the non-conductive sheet is made of a thermoplastic resin. 8. The disc jacket according to claim 7, wherein the thermoplastic resin is polyethylene, polypropylene, polystyrene, acrylic butadiene styrene copolymer, acrylic styrene copolymer, polyvinyl chloride, or the like. Production method. 9. The volume electric resistivity of the conductive sheet is 1 × 10.
Claim 2 characterized in that it is ¹⁴ Ωcm or less.
A method for manufacturing a disc jacket according to the items 3, 4 and 5. 10. The non-woven fabric is cotton, rayon, acetate,
Polyester fiber, nylon, polypropylene, vinylon, other acrylic fibers, etc. are arranged in a web shape (thin cotton shape) or a mat shape by an appropriate method, and a sheet shape obtained by bonding the fibers to each other by an adhesive or the fusion force of the fibers themselves. The method of manufacturing a disc jacket according to claims 1 and 3, characterized in that 11. A woven fabric is a woven fabric of fibers such as cotton, rayon, acetate, nylon, polyester, vinylon, polyvinyl chloride, polypropylene, saran, etc., based on a plain weave, a diagonal weave and a swoosh weave. The method for manufacturing a disc jacket according to claims 1 and 3, characterized in that. 12. A film on which a printed or embossed film has a "frame capable of writing information necessary for storage of various patterns, continuous patterns or floppy disks", and further the printed film and embossing. Sheet, a metal vapor-deposited sheet, or a laminated film obtained by laminating a metal foil such as an aluminum foil, a copper foil, a silver foil, or a gold foil, or a single layer film or a laminated film thereof having conductivity. The method for manufacturing a disc jacket according to claim 1, wherein: