JP2975181B2 - Telephone card manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a telephone card based on a metal foil.

[0002]

2. Description of the Related Art When a public telephone is used, there is an increasing tendency to use a telephone card, avoiding the trouble of putting coins each time. This telephone card has a laminated structure in which a magnetic recording layer is bonded to a base material such as a synthetic resin sheet or cardboard.

With the spread of telephone cards, various improvements have been proposed. For example, it has been proposed in JP-A-2-1393 and JP-A-2-50897 to form a heat-sensitive recording medium so that visible information corresponding to individual information can be easily recorded. Also,
As a device for transferring necessary information to a substrate, a transferable magnetic sheet provided with an acrylate resin-based release agent is introduced in JP-A-56-134318.

[0004] Furthermore, the design of telephone cards, the PR effect, etc., have been enhanced, and the commercial value itself has been increased.
A card is used in which a synthetic resin sheet such as polyester or a cardboard is offset-printed or silk-printed on one side with UV ink and a magnetic recording layer is laminated on the back side.

[0005]

Recently, telephone cards are not only used as a substitute for cash when making a phone call, but also by printing on the surface, souvenirs,
It has come to be treated as a new value-added product as a gift or PR product. In addition, with the trend of the times and diversification of hobbies, there is a demand for a novel and more luxurious telephone card.

[0006] In this respect, a conventional telephone card using a synthetic resin sheet or cardboard as a base has good printability on the base, but has a poor impression given by the material of the base. In addition, the crush resistance and the bending resistance are poor, and the device is likely to be unusable when an unexpected force is applied or when inserted into a card insertion slot of a telephone in an incorrect posture.

The present invention has been devised to solve such a problem. By using a metal foil such as a stainless steel foil as a base, a novel surface property different from that of a conventional material is exhibited. It is an object of the present invention to provide a telephone card that gives a good impression and has excellent durability.

[0008]

According to the telephone card manufacturing method of the present invention, in order to achieve the object, a paste is pasted on one side of a metal foil in a striped form and a protective paper is pasted thereon. It is characterized in that the magnetic recording layer is cut to the size of a telephone card, and then a magnetic recording layer whose back surface is polished so that the entire thickness becomes a standard value is adhered to the surface from which the protective paper has been peeled off from the metal foil.

As the metal foil, a non-magnetic stainless steel such as SUS304 or SUS305 which does not affect the magnetic recording layer can be used. In addition, since a punch hole indicating the frequency of use is opened in metal foil when using the phone,
It is preferable to use a material softened by component design, heat treatment, or the like.

If the metal foil is too thick, the thickness of the magnetic recording layer bonded to the metal foil is restricted because the product thickness of the telephone card is standardized. Also, it is difficult to make a punch hole for displaying the telephone usage frequency. vice versa,
If the metal foil is too thin, the waist will be weak. In this regard, 20
It is preferable to use a metal foil having a thickness of 60 μm. In addition, a portion where a punch hole for indicating the telephone use frequency is formed may be locally thinned by embossing or etching to facilitate the perforation.

[0011] Protective paper is glued to one side of the metal foil.
The glue applied to the surface of the metal foil to attach the protective paper is preferably a rubber-based adhesive or the like on which a flexible adhesive layer is formed. Conversely, if a strong adhesive layer is formed using a two-component mixed type adhesive, the magnetic recording layer is liable to be cracked due to bending stress that is frequently applied when a telephone card is used, making it unusable.

[0012] The adhesive for attaching the protective paper is preferably applied to the surface of the metal foil in a striped manner so that air bubbles do not remain between layers when the magnetic recording layer is attached to the stainless steel foil. Specifically, the width of the portion where the glue is attached is 3 to 7 m.
m and a width of 0.3 to 1 m between adjacent glue adhering parts
A metal exposed portion of about m is provided. The thickness of the adhesive layer is optimally about 10 to 20 μm.

The glue adhering to the metal foil does not dry even when left for a long time, and exhibits good adhesive strength when the magnetic recording layer is laminated in a later step. Further, the metal foil covered with the protective paper is easy to handle.

The metal foil to which the protective paper is attached is cut to the size of a telephone card. This cutting is preferably performed with a laser beam so that burrs and the like do not occur on the cut surface. The metal foil cut by the laser beam has a cut surface having a rounded edge as if chamfered, and the step of polishing the cut surface can be omitted.

On the other hand, when the metal foil is cut mechanically, burrs are easily generated on the back side of the cut portion. The generated burrs are caught in the card insertion slot when the telephone card is inserted into the telephone, and cause trouble.
Therefore, an extra step of polishing the cut surface is required.

Further, the metal foil is provided with an appropriate pattern by printing, etching or the like on the surface opposite to the side where the protective paper is attached. This patterning can be performed either before or after cutting the metal foil to the size of the telephone card. Further, if the surface to which the ink is applied is roughened in advance, the fixability of the ink is improved, and a clear printed pattern can be obtained.

A magnetic recording layer whose thickness has been adjusted by polishing the back surface is bonded to the treated metal foil so that the total thickness of the telephone card corresponds to the card insertion slot of the telephone. This backside polishing is also effective in improving the adhesion of the magnetic recording layer to the metal foil. However,
It is necessary to polish the magnetic recording layer to such an extent that the magnetized portion is not damaged.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. Non-magnetic stainless steel SUS with a thickness of 30 μm as the metal foil of the telephone card base
304 was used. Then, the non-magnetic stainless steel foil wound in a coil shape was rewound and cut in advance into a size easy to glue.

As shown in FIG. 1, a rubber-based paste 20 having an average thickness of 15 μm was applied on one surface 11 of the stainless steel foil 10 in a stripe shape. At this time, the width of one glue adhesion layer 21 is 6 m.
m, and the gap 22 between the adjacent glue adhering layers 21 is 0.5
mm width. Then, the glue adhering layer 21 formed in a stripe shape
, The protective paper 30 was bonded to the stainless steel foil 10. The other surface 12 of the stainless steel foil 10 was mirror-finished in advance.

The stainless steel foil 10 to which the protective paper 30 was bonded was cut into a standard size for a telephone card by a laser beam. Unlike the case of mechanical cutting, the cut surface by the laser beam had no edges such as burrs and had edges.

The other side 12 of the cut stainless steel foil 10
While applying water at a pressure of 6 kg,
Polishing was performed lightly for 2 to 3 seconds on an abrasive provided with 3 μm abrasive grains. By this polishing, the other surface 12 of the stainless steel foil 10 was slightly roughened.

The other surface 12 after polishing was subjected to offset printing using UV ink to form a printed pattern 40. At this time, since the other surface 12 was roughened, the fixing of the UV ink was good, and the print finish was excellent. Also,
An etching pattern 50 was formed on a part of the other surface 12. The etched pattern 50 has a three-dimensional effect, and the printed pattern 4
It had an appearance giving an impression different from 0. (Fig. 2)

One side 11 of the treated stainless steel foil 10
Then, the protective paper 30 is peeled off, and the magnetic recording layer 60 is attached as shown in FIG. Here, the slit width is 300μ
In order to make the total thickness of the telephone card 200 to 220 μm corresponding to the card insertion slot of the telephone set m, the thickness was adjusted by polishing the back surface of the magnetic recording layer 60.

That is, the non-magnetized back surface of the magnetic recording layer 60 is polished with an appropriate abrasive so that the total thickness including the stainless steel foil 10 and the glue adhesion layer 21 is 200 to 200.
The thickness of the magnetic recording layer 60 is reduced to 220 μm. As the polishing material at this time, the same abrasive grains as used when polishing the other surface 12 of the stainless steel foil 10 were used.

The polished back surface 61 of the magnetic recording layer 60 is
One side 1 of stainless steel foil 10 with rubber glue 20 interposed
Pressed to 1. With the pressing force at this time, the glue-adhering layer 21 provided in a stripe shape spreads along the entire surface 11, and filled the gap 22 between the adjacent glue-adhering layers 21. As a result, the magnetic recording layer 60 was bonded to the stainless steel foil 10 without bubbles remaining at the bonding interface. (Fig. 3)

The obtained telephone card 70 has a printed pattern 40 and an etched pattern 50 on its surface as shown in FIG.
And the contrast between the printed pattern 40 and the etched pattern 50 gives a novel impression that has never been seen before. Further, the punch hole 72 formed along the frequency scale 71 indicating the frequency of use could be opened without any trouble using a conventional telephone.

[0027]

As described above, in the telephone card of the present invention, a metal foil is used as a base and a magnetic recording layer is formed thereon. Since the substrate is made of metal foil, it has excellent rupture resistance and bending resistance compared to conventional synthetic resin sheets and cardboard, etc., and makes use of the metallic surface gloss to give users a strong and secure impression. It becomes a telephone card. In addition, since a pattern having a three-dimensional effect can be provided by etching or half-etching, a unique design property that cannot be obtained with a conventional printed pattern can be provided. Thus, according to the present invention, a telephone card having excellent commercial value is obtained.

[Brief description of the drawings]

FIG. 1 shows a state in which protective paper is stuck to a metal foil.

FIG. 2 shows a partial cross section of a metal foil to which protective paper is attached.

FIG. 3 shows a partial cross section in which a magnetic recording layer is bonded to a metal foil.

FIG. 4 shows the obtained telephone card.

[Explanation of symbols]

Reference Signs List 10 stainless steel foil (metal foil) 11 one side (magnetic recording layer forming side) 12 other side (pattern forming side) 20 rubber glue
21 Glue adhesion layer 22 Gap between adjacent glue adhesion layers (exposed metal surface)
DESCRIPTION OF SYMBOLS 30 Protective paper 40 Printing pattern 50 Etching pattern 60 Magnetic recording layer 61 Back surface (lamination side) 70 Telephone card 71 Frequency scale 72 Punch hole

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuaki Masaki 11-1 Showa-cho, Kure City, Hiroshima Prefecture Inside Kure Sales Office, Shinwa Corporation (72) Inventor Yuji Horiuchi 8-47- 22 (56) References JP-A-1-108098 (JP, A) JP-A-64-33740 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B42D 15/10

Claims (5)

(57) [Claims] 1. A metal foil is pasted on one side with glue in a striped form and a protective paper is affixed, and then the metal foil is cut into a telephone card size, and then the protective paper is separated from the metal foil. A method for manufacturing a telephone card, comprising: adhering a magnetic recording layer whose back surface is polished so that the entire thickness becomes a standard value. 2. The method for manufacturing a telephone card according to claim 1, wherein the metal foil is made of non-magnetic stainless steel. 3. The metal foil according to claim 1, which has a thickness of 20 to
A method for manufacturing a telephone card, which is 60 μm. 4. A method for manufacturing a telephone card, wherein the metal foil according to claim 1 is cut by a laser beam. 5. A method for manufacturing a telephone card, wherein the metal foil according to claim 1 is patterned by printing, etching or the like on the surface opposite to the side where the protective paper is attached.