JPH018360Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plastic card with metallic luster.

Recently, plastic cards have been widely used as identification cards, bank cards, membership cards, credit cards, etc. These cards can be used as they are, or magnetic recording methods can be used to store various information on them. It is used by configuring it to record information and function as a magnetic card.

In recent years, several cards with a beautiful appearance that have a metallic luster have been proposed. Conventional cards of this type are printed with printing ink in which metallic luster pigments are dispersed on a plastic sheet by offset printing or screen printing, etc. A glossy printed layer is formed and a transparent plastic sheet is laminated on the printed layer, or a metallic glossy powder layer is formed by attaching metallic powder with metallic luster to the plastic sheet with an adhesive. Some had a structure in which a transparent plastic sheet was laminated on the powder layer. However, since the metallic gloss printed layer or the metallic gloss powder layer cannot be formed too thick, it is difficult to obtain sufficient metallic luster, and the bonding between the transparent plastic sheet and the metallic gloss printed layer or the metallic gloss powder layer is poor. However, there were drawbacks such as the transparent plastic sheet being easy to peel off. In order to improve the above-mentioned problems, a structure has been proposed in which a metallic luster pigment is dispersed and kneaded into a transparent plastic sheet to produce a metallic lustrous plastic sheet, and a transparent plastic sheet is laminated on top of the metallic lustrous plastic sheet. Ta. However, in this case, if the pigment concentration is increased in order to improve the metallic luster, the dispersion of the pigment becomes poor, which tends to cause uneven metallic luster coloring, and the pigment adheres to the rolling roll during the sheet manufacturing process, which impedes manufacturing workability. In the end, it was not possible to obtain a good plastic sheet because of the tendency to cause problems on the surface and also because the physical properties of the sheet were poor in tensile strength and impact strength. Furthermore, when using a plastic card as a magnetic card, it is difficult to obtain one with a high pigment concentration as described above, so with the card thickness normally used (0.7 to 0.8 mm), the card becomes translucent. Since the light transmittance is too high, for example, when the card is applied to various card processing devices, there is a problem that the card position becomes impossible to detect because the light transmittance of the card is too high.

In order to solve the above problems, the present inventors proposed a plastic card having a structure in which a black plastic sheet is interposed between two metallic luster plastic sheets. However, although this plastic card can solve the above problems, due to the interposition of a black plastic sheet, it only exhibits a dark and unchanging metallic luster.
There was a drawback in that it was not possible to provide an appearance with a metallic luster that was more similar to that of metal.

This invention was made in view of the above points,
It is an object of the present invention to provide a plastic card which not only can solve the problems of the prior art mentioned above but also has a metallic luster with a more varied appearance.

That is, in the present invention, metallic luster plastic sheets containing metallic luster pigments are laminated on both sides of a gray plastic sheet, a visible recording layer is formed on the outer surface of each of the metallic luster plastic sheets, and each of the metallic luster plastic sheets is laminated. The object of the present invention is to provide a plastic card having a metallic luster, characterized in that a transparent plastic sheet is laminated on the outer surface of the card so as to cover the recording layer.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a plastic card 1 with metallic luster, which is an embodiment of the present invention. This plastic card 1 has metallic luster plastic sheets 4 containing a metallic luster pigment 3 laminated on both sides of a gray plastic sheet 2, and a visible recording layer 5 on the outer surface of each of the metallic luster plastic sheets 4.
, and further a metallic luster plastic sheet 4
It has a structure in which a transparent plastic sheet 6 is laminated so as to cover the outer surface of each of the visible recording layers 5,
Its thickness is usually 0.7-0.8 mm.

Gray plastic sheet 2, metallic gloss plastic sheet 4, and transparent plastic sheet 6
The synthetic resin used as the material may be the same or different. For example, polyvinyl chloride, polyethylene, polypropylene, polyester, polystyrene, polycarbonate, etc. can be used, but those with good transparency are preferred. desirable.

Gray plastic sheet 2 is the above plastic.
After heating and kneading 10 to 15 parts by weight of the gray pigment per 100 parts by weight, a sheet with a smooth surface can be obtained using a roll or the like. As the gray pigment, a black pigment such as carbon black, lamp black, or diamond black is mixed with a white pigment such as titanium white, and the mixing ratio is 1 part by weight of black pigment to 10 to 20 parts by weight of white pigment. is preferred. If the amount of white pigment mixed with the black pigment is larger than the above, the gray plastic sheet 2 will become too white, and the light transmittance of the plastic card 1 will increase, causing problems when applied to various card processing devices, as well as ensuring that there is not enough metal. Difficult to obtain gloss.

The metallic luster plastic sheet 4 can be obtained using the metallic luster pigment 3 in the same manner as the gray plastic sheet 2 described above. Examples of the metallic luster pigment 3 include lead-based compounds and bismuth-based compounds, and are used in an amount of 1.0 to 10 parts by weight per 100 parts by weight of plastic. When the gray plastic sheet 2 and the metallic luster plastic sheet 4 are heated and kneaded, a small amount of stabilizer, lubricant, etc. may be added.

The visible recording layer 5 is a metallic luster plastic sheet 4.
Background patterns, patterns, characters, etc. are formed on the outer surface of each of the sheets, and these are usually formed by offset printing, silk screen printing, etc.

In manufacturing plastic card 1,
A metallic luster plastic sheet 4 with a visible recording layer 5 formed on both sides of the gray plastic sheet 2 in advance.
After laminating transparent plastic sheets 6 on both sides, heating at appropriate temperature and pressure,
It can be obtained by crimping. At this time, if necessary, it is also possible to use an adhesive on the laminated surface.

The plastic card 1 of the present invention has a light transmission density
2.5 or above, which is the Japanese Industrial Standard (JIS) for credit cards with magnetic stripes.
B9560), it can be used as a magnetic card because it satisfies the light transmission density requirement of 2.0 or higher. In this case, although not particularly shown, a magnetic layer is provided on the transparent plastic sheet 6 of the plastic card 1 of the present invention to produce a magnetic card. Since this magnetic card has a beautiful metallic luster and a light transmission density higher than that specified by JIS, when this magnetic card is applied to a card processing device, the card position can be reliably detected. The plastic card 1 of the present invention is not limited to being used as a magnetic card, but can also be used as an identification card, membership card, credit card, etc.

As explained above, the plastic card of the present invention is provided with a gray plastic sheet, which improves the iris effect of the metallic luster plastic sheet, so even if the content of metallic luster pigment is small, it is extremely beautiful. It can exhibit a metallic luster and has a great design effect. Furthermore, by using a gray plastic sheet, the design effect can be further increased compared to the case where a black plastic sheet is used. In addition, by producing various plastic cards with different shades of gray from the gray plastic sheet, it is possible to provide products with a wide variety of designs and further improve the product value. It has various advantages such as cost.

Next, a concrete example of the present invention will be shown.

Example 1 After heating and kneading 100 parts by weight of polybenyl chloride, 3.0 parts by weight of a tin-based stabilizer, 2.0 parts by weight of a lubricant, 1.0 parts by weight of carbon black, and 10 parts by weight of titanium white,
A gray plastic sheet with a thickness of 0.1 mm was molded.
On the other hand, 100 parts by weight of polyvinyl chloride, 3.0 parts of tin-based stabilizer
Parts by weight, 2.0 parts by weight of lubricant, 5.0 parts by weight of metallic luster pigment (product name: Pearl Essence, manufactured by Nihon Koken Kogyo Co., Ltd.)
After heating and kneading the parts by weight, two metallic luster plastic sheets with a thickness of 0.23 mm were obtained. A visible recording layer such as a ground pattern or pattern was formed on this sheet by offset or silk screen printing. Next, a metallic luster plastic sheet with a visible recording layer was placed on both sides of the gray plastic sheet with the visible recording layer on the outside, and a layer of 0.1 mm thick was placed on both outer sides.
After overlapping transparent plastic sheets made of transparent rigid polyvinyl chloride, they were sandwiched between mirror-finished stainless steel plates and heated at a temperature of 150 using a heat press.
When heated and pressed for 10 minutes at a temperature of 30 kg/cm ² , a plastic card with a beautiful metallic luster was obtained with complete melt bonding.

The light transmission density of this plastic card was measured with a Macbeth TD 404 transmitted light densitometer (filter: Ratten #106) and found to be 3.0.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view showing a plastic card which is an embodiment of the present invention. 1...Plastic card, 2...Gray plastic sheet, 3...Metallic luster pigment, 4...Metallic luster plastic sheet, 5...Visible recording layer, 6
...Transparent plastic sheet.

Claims (1)

[Scope of utility model registration request] A metallic luster plastic sheet containing a metallic luster pigment is laminated on both sides of a gray plastic sheet, a visible recording layer is formed on the outer surface of each of the metallic luster plastic sheets, and a visible recording layer is formed on the outer surface of each of the metallic luster plastic sheets. A plastic card having a metallic luster layer, characterized in that it is made by laminating transparent plastic sheets so as to cover the layer.