JPH04193595A - Preparation of visibly recordable card - Google Patents

Abstract

PURPOSE:To provide a method simpler than a method for successively forming necessary layers to an individual card and to prevent the damage of a card base material by preliminarily forming and holding a laminate consisting of a recording layer, a reflecting layer and an adhesive layer on a release sheet and transferring the same to the card base material. CONSTITUTION:For example, a resin such as polyvinyl chloride is applied to a release sheet 4 composed of polyethylene terephthalate preliminarily subjected to surface release treatment to form a recording layer 21 and, next, a reflecting layer 22 is formed thereon by the vapor deposition of aluminum. A hot-melt adhesive layer 23 is applied and formed on the layer 22 to form a laminate 2. Next, a card base material 11 is placed on a receiving table 5 wherein a rubber plate 52 is bonded to a metal 51 and the release sheet 4 is sent in so as to turn the laminate 2 downwardly. As the card base material 1, one to which predetermined printings 3, 3 are preliminarily applied can be used. Then, the laminate 2 is pressed to the surface of the card base material under heating by a heating head 6 through the release sheet 4. By this method, the hot-melt adhesive layer 23 is melted to transfer the laminate 2 to the surface of the card base material 1.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a recording layer for repeatedly forming and erasing visible records on cards that are used repeatedly, such as commuter passes, admission passes, and various prepaid cards. Concerning how to form.

(Prior Art) Commuter passes for public transportation and admission permits to event venues and buildings are used repeatedly every day, but due to management reasons, there is no way to check for unauthorized boarding or unauthorized entry.

Also, various prepaid cards include magnetic cards and I/O cards.
Although C cards are used, the recorded contents cannot be viewed directly, so it is not possible to easily check the payment amount or balance.
There was a problem in terms of guaranteeing the content to users.

Conventionally, therefore, methods have been proposed in which a visible record is recorded on the card each time it is used and the record is erased.

For that purpose, a material that causes a reversible change in appearance is required, and the applicant first formed a frosted surface (rough surface) on the surface of a smooth synthetic resin layer that can be erased by heat. step, and a step of erasing the frosted surface with heat to return it to a smooth surface. 70 This method creates a visually visible image based on the contrast between the frosted surface and the smooth surface, that is, the difference in light reflectance and transparency. Proposed.

In addition, we have developed materials that change between a transparent state and a cloudy state depending on the temperature, by dispersing organic low-molecular substances in a synthetic resin matrix (
JP-A-55-154198).

A polymer blend system that dissolves and becomes transparent in a low temperature range and phase separates and becomes opaque in a high temperature range (Japanese Patent Application Laid-Open No. 61-25885)
3)=Polymer liquid crystal materials that become transparent above the isotropic phase transition temperature, maintain a transparent state when rapidly cooled to room temperature, and become cloudy when slowly cooled (Japanese Patent Application Laid-Open No. 2-16082) have been proposed.

In these methods of recording by reversibly changing between a transparent state and an opaque state, if a reflective layer is placed on the bottom surface of the recording layer,
The image becomes easier to see.

(Problem to be Solved by the Invention) However, when attempting to manufacture a card by combining these materials, it is necessary to sequentially laminate a reflective layer, a recording layer, and in some cases a surface protective layer on a card base material. Since the cards will be passed through the process in sequence,
The problem arises that manufacturing becomes complicated.

In particular, it is not necessary to provide the recording layer and the reflective layer on the entire surface of the card base material, and it is fine to provide them only on a part of the surface. It's time consuming.

(Means for Solving the Problems) The present invention efficiently forms a recording layer for repeatedly forming and erasing visible records on cards that are used repeatedly, such as commuter passes, admission passes, and various prepaid cards. The method provides a method in which a laminate in which necessary layers are laminated on a release sheet is formed and held in advance, and the laminate is transferred from the release sheet to the surface of a card base material by heating and pressing. It is characterized by

The present invention will be described in detail below with reference to the drawings.

Fig. 1 is a perspective view showing an example of a card manufactured by the method of the present invention, Fig. 2 is a cross-sectional view taken along the line ■-■ of Fig. 1, and Fig. 3 is a cross-section of the laminate held on a release sheet. 4 are cross-sectional views of the state in which the laminate is transferred onto the surface of the card base material.

The card produced according to the present invention will be explained with reference to FIGS. 1 and 2. The card is made by laminating a recording layer 2 on a part of the surface of a card base material 1 such as a strong polyethylene terephthalate sheet, printing 3. 3 to display necessary explanations and decorative designs.

The laminate 2 includes a recording layer 21, a reflective layer 22, and an adhesive layer 2.
3 and is adhered to the card base material 1 by an adhesive layer 23.

The recording layer 21 is made of a material that exhibits a visible and reversible change between a transparent state and an opaque state.

For example, this material consists of a smooth layer of synthetic resin. The layer is heated to a temperature higher than the glass transition temperature (Tg) of the synthetic resin, and the melting point (
Tm) at a temperature below J I 5-B-〇601 10
When frosted to a point average roughness of about 1 to 10 μm, a frosted surface with distortion is formed. Then, when the frosted surface is partially heated at a temperature higher than the frosting temperature, the strain is released only in that portion and returns to a smooth surface, making it possible to form an image.

The image can be erased by frosting the entire surface again at a temperature of 7 g or more and Tm or less.

In this case, the resin is preferably a non-grade resin such as polyvinyl chloride, polystyrene, polymethyl (meth)acrytate, or polycarbonate.

Also, JP-A-55-154198, JP-A-58-459
As seen in 98, polyvinyl chloride, vinyl chloride-
Synthetic resins such as vinyl acetate copolymer, polyvinylidene chloride, vinylidene chloride copolymer, polyester, polyamide, polystyrene, polymethyl (meth)acrylate, and higher fatty acids having 16 or more carbon atoms and aliphatic saturation as organic low molecular substances. A layer consisting of a composition in which dicarboxylic acid is dispersed can also be used.

This material becomes transparent when heated to, for example, 70 to 100°C, and remains transparent even when cooled to room temperature.
When cooled from a temperature exceeding 00°C to room temperature, it becomes cloudy (opaque), so depending on the temperature conditions, it is possible to reversibly form an image.
Can be erased.

The reflective layer 22 makes the image stand out clearly to make it easier to see, and is made of a vapor-deposited layer or foil of a metal such as aluminum or tin, or a paint mixed with aluminum powder. - A layer with high glossiness and a 10-point average roughness defined by 601 of 0.1 μm or less is preferable.

Further, a protective layer 8 can be provided on the surface of the recording layer 21 if necessary. This protective layer 8 is effective in preventing deterioration of the recording material due to heating during recording and erasing, and is made of, for example, polyethylene terephthalate, polyetherimide,
Synthetic resins with high heat resistance such as polyether ether getone, polysulfone, polyphenylenesulfide, polyarylate, and polyimide are preferred.

A method of manufacturing such a card will be explained with reference to FIGS. 3 and 4. A release sheet 4 made of polyethylene terephthalate or the like whose surface has been subjected to release treatment in advance is coated with a resin such as polyvinyl chloride to form the recording layer 21. Then, a reflective layer 22 is formed thereon by aluminum vapor deposition or the like. And on top of that, a hot melt type adhesive layer 23
The laminate 2 is formed by coating.

Then, the laminate 2 is punched out into a predetermined shape.

Next, as shown in FIG. 4, the card base material 1 is placed on the stand 5, and the release film 4 is fed in with the laminate 2 facing down.

As the card base material 1, one that has been subjected to predetermined printing 3.3 in advance can be used.

Then, the heating head 6 heats the laminate 2 onto the release film 4.
It is heated and pressed onto the surface of the card base material 1 through. As a result, the hot-melt adhesive layer 23 is melted and the laminate 2 is transferred to the surface of the card base material 1, making it possible to easily manufacture the desired card.

The heating pad 6 may be in the form of a roll.

Furthermore, when providing the protective layer 8 on the surface of the recording layer 21,
The protective layer 8 may be formed on the release sheet 4 first.

(Effects of the Invention) According to the method of the present invention, a laminate consisting of a recording layer, a reflective layer, and an adhesive layer is formed and held on a release sheet in advance, and is transferred to a card base material. It is easier than sequentially forming the necessary layers on the card, and there is no damage to the card substrate.

Furthermore, the recording layer can be accurately formed at any position on the surface of the card base material.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a card manufactured by the method of the present invention, Fig. 2 is a cross-sectional view taken along the line ■-■ of Fig. 1, and Fig. 3 is a cross-section of the laminate held on a release sheet. FIG. 4 is a cross-sectional view of the state in which the laminate is transferred to the surface of the card base material. 1... Card base material 2... Laminate 21... Recording layer, 22... Reflective layer 23... Adhesive layer
4...Release sheet patent applicant Mitsubishi Plastics Co., Ltd. agent Patent attorney Kumi Kondo 'Figure 2 Figure 3

Claims (1)

[Claims] When forming a recording layer made of a material that reversibly changes between a transparent state and an opaque state on the surface of a card base material, a laminate in which a recording layer, a reflective layer, and an adhesive layer are sequentially laminated on a release sheet. 1. A method for producing a visually recordable card, which comprises holding the laminate and transferring the laminate from a release sheet to the surface of a card base material by heating and pressing.