JP3047529B2 - Thermal recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive recording medium for recording predetermined visible information and signal information by using heat recording means such as a thermal head.

[0002]

2. Description of the Related Art In general, as a thermal recording method for recording predetermined visible information or invisible signal information, a thermal color recording method in which a dye contained in a recording layer is colored by heating by heating, a thermal fusion transfer method is possible. Transfer recording method using a thermal transfer recording medium having a colored layer, a recording method in which a recording layer is made transparent by heat, a metal thin film method in which a metal thin film is melted or evaporated by heat, and a high-temperature method in which a polymer film is thermally deformed. A molecular film deformation method and the like are known.

[0003]

Such a thermal recording system is,
Recently, various types of cards such as credit cards, shopping cards, and members' cards, or recording methods for directly recording necessary information on recording materials such as passbooks, stickers, and labels have come to be widely used. In particular, in a recording medium that does not require correction or erasure of recorded information, durability of the recorded information, prevention of falsification, and good design of the appearance of the recording medium are required.

[0004] The present invention is a thermosensitive recording medium having a durable retention of recorded information and a falsification preventing performance and having a good external appearance, and a relatively simple recording mechanism and reading mechanism ensure that necessary information is reliably obtained. The purpose is to enable recording and reading.

[0005]

Means for Solving the Problems According to claim 1 of the present invention.
In the invention, the resin layer 2 is laminated on one or both sides of the base sheet 1.
Approaching the surface with the heating pin or heating press mold or
By melting the resin layer 2 by contact or pressure contact
Recording with low reflection area with light diffusion performance with fine irregularities
The metal thin film reflective layer 3 having a portion formed on the surface is formed of the resin layer
2 is a heat-sensitive recording material characterized by being laminated on
In addition, the invention according to claim 2 is a
The resin layer 2 is laminated on one side or both sides,
The hot pressing mold is brought close to or in contact with
The resin layer 2 was melted to form fine irregularities and a thin film
Recording with low reflection area with light diffusion performance and light absorption performance
The metal thin film reflective layer 3 having a portion formed on the surface is formed of the resin layer
2 on the base sheet 1 side of the resin layer 2 or
On the metal thin film reflective layer 3 side or on both sides of the resin layer 2,
A low anti-reflection film with light absorption performance
A light absorbing layer 8 for forming the recording portion having a projection region;
It is a thermosensitive recording medium characterized by being laminated.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to embodiments. FIG. 1 is a side view of the thermosensitive recording medium of the present invention, in which a resin layer 2 is provided on one surface of a base sheet 1, and an outer surface of the resin layer 2 is provided on the outer surface of the resin layer 2.
A metal thin film layer 3 thinner than the resin layer 2 is laminated.

On the other surface of the base sheet 1, a printing layer 4 of letters, numbers, symbols, patterns, colors, etc. is appropriately applied, and a transparent surface protection layer 5 is coated on the printing layer 4 side. Alternatively, they can be laminated by a film lamination method, an extruder lamination method, or the like.

The base sheet 1 can be made of paper, paper material, synthetic paper, synthetic resin, metal or the like. For example, the thickness of the base sheet 1 is about 0.2 mm to 0.8 mm.

The resin layer 2 is made of a thermoplastic resin such as polyvinyl chloride, polyvinyl chloride-vinyl acetate copolymer resin, polyolefin resin, polyester resin (saturated polyester, unsaturated polyester), thermosetting resin,
Alternatively, these mixed resins can be used. In addition, the thickness of the resin layer 2 is about 0.05 mm to 0.5 mm. or,
The resin layer 2 can be laminated on the base sheet 1 by an appropriate method such as a coating method, a film laminating method, and an extruder laminating method.

The metal thin film layer 3 is a metal foil or a metal vapor-deposited film of aluminum, tin, zinc, copper, nickel, or the like, or an alloy thereof. For example, the thickness of the metal thin film layer 3 is suitably in the range of ¹ × 10 ⁻⁴ μm to ¹ × 10 ⁻¹ μm, and is preferably formed by a metal deposition method. When the thickness is more than this, the thermal recording performance may be deteriorated. However, the thickness of each of the base sheet 1, the resin layer 2, and the metal thin film layer 3 is not limited to the above numerical values.

The surface of the metal thin film layer 3 has a metallic material color or is appropriately colored, and has a glossy and smooth surface with relatively good light reflection performance or as smooth as possible. It is desirable that the surface is a surface, and it is better if the surface is a mirror surface. The printing layer 4 is for displaying desired characters, symbols, pictures, colors, and the like on the thermosensitive recording medium of the present invention.

The surface protective layer 5 is a transparent resin layer, such as polyvinyl chloride, polyvinyl chloride-vinyl acetate copolymer resin, polyolefin resin, polyester resin (saturated polyester, unsaturated polyester) and the like. , A thermoplastic resin, a thermo-crosslinkable curable resin, or a resin mixture thereof.

Using the thermosensitive recording medium of the present invention, predetermined information (data) is transferred to a thermal head (set temperature is, for example, 150 °).
C to 400 ° C.).
2A, the metal thin-film layer 3 side of the thermosensitive recording medium A according to the present invention is spaced apart and opposed to a lower side of a thermal head 6 as a heating medium, as shown in FIG. After the installation, predetermined write information to be recorded is transmitted to the thermal head 6 as a signal.

A reciprocating heating stroke pin 6b provided in a housing 6a of the thermal head 6
Is moved in the vertical direction toward the thermosensitive recording medium A based on the signal, so that the heating tip 6c of the stroke pin 6b is projected toward the metal thin film layer 3 so that the metal thin film layer 3 Approach the tip 6c to the surface,
Alternatively, the surface of the metal thin film layer 3 is pressed by a predetermined pressure (for example, a pressure of a stroke pin of a normal thermal head).

As soon as the surface of the metal thin film layer 3 is heated or pressed under heat, the heating tip 6 of the stroke pin 6a is heated.
c returns to the housing 6a away from the metal thin film layer 3 surface.

As the thermal head 6, for example, a raster system (dot system) in which a predetermined number of stroke pins 6a are arranged at a density of 8 lines / mm is used, and the tip of each stroke pin 6a is used. One dot is represented by the section 6c, and the combination of the dots represents the form of a character such as a character, a numeral, or a code mark to be recorded.

As shown in FIG. 2B, the temperature of the metal thin-film layer 3 heated or pressed by the tip 6c of the stroke pin 6a is higher than that of the portion not heated or pressed. The lower resin layer 2 is also heated and temporarily melted.

The heating tip 6c of the stroke pin 6b
By melting of the resin layer 2 and cooling of the metal thin film layer 3 and the resin layer 2 due to the separation of the tip 6c.
Fine irregularities due to the difference in expansion and contraction ratio due to heat between the resin and the metal at the interface between the resin layer 2 and the metal thin film layer 3 are reduced.
A recording portion 7 having fine irregularities which is generated on the surface and has light diffusion (light scattering) performance is obtained.

The heating tip 6 of the stroke pin 6b
When c is in pressure contact with the surface of the metal thin film 3, the metal thin film layer 3 in the pressed portion of the tip 6 c is heated while being compressed, and at the same time, the lower resin layer 2 is also heated and melted, and the stroke is reduced. Irregularities are generated on the surface of the metal thin film layer 3 by the pressing of the heating tip 6c of the pin 6b, and a recording section 7 having fine irregularities is obtained, and predetermined information is recorded on the surface of the thermosensitive recording medium A as the recording section 7.

As a heating medium for recording information on the thermosensitive recording medium A of the present invention, it is possible to use a stamping die having a predetermined shape other than the dot system using the stroke pins 6a.

As shown in FIG. 2 (b), the recording portion 7 having the fine irregularities recorded on the surface of the metal thin film layer 3 does not approach or come into contact with the heating medium, or records without contacting the heating medium by pressing. Compared to the surface of the metal thin film layer 3 in a region not to be diffused (a relatively smooth surface or a mirror surface having light reflection performance), the metal thin film layer 3 has a diffusion performance of scattering light, a high reflection area m having high light reflection performance, and a light diffusion ( A low-reflection area n corresponding to the recording unit 7 having light scattering performance is irradiated by a projector that emits irradiation light L, and the areas m and n are reflected by a reflection type optical system including a CCD camera or a line sensor. The identification information is detected by the type reader, and the display information by the recording unit 7 is read.

FIG. 3 is a side view for explaining a laminated state in another embodiment of the thermosensitive recording medium A of the present invention. FIG.
1A, a light-absorbing layer 8 made of a light-absorbing coloring material such as black ink is provided on one surface of a base sheet 1, and a resin layer 2 is laminated from above the light-absorbing layer 8. , A heat-sensitive recording body in which a metal thin film layer 3 is laminated.

It should be noted that the recording method can be used to record the data in the recording section 7 in the same manner as in the first embodiment.
When the metal thin film layer 3 of the recording section 7 pressed by the heating tip 6c of the stroke pin 6b is further thinned and the light concealing property for the lower layer is reduced, the light absorbing layer 8 in the lower layer The light absorbing performance is provided in addition to the diffusing performance, and the recording unit 7 can be further made a low light reflective area.

FIG. 3B shows a light absorption layer 8 between the resin layer 2 and the metal thin film layer 3 which are sequentially laminated on one surface of the base sheet 1.
Is a heat-sensitive recording medium on which is laminated The recording unit 7 can record the data in the recording unit 7 in the same manner as in the above-described embodiment.

FIG. 3C shows that the resin layer 2 and the metal thin film layer 3 are sequentially laminated on the base sheet 1, and the resin layer 2 is used as a first resin layer 2a and a second resin layer 2b. The second resin layer 2
This is a thermosensitive recording medium in which a light absorbing layer 8 is laminated between a and 2b, and the recording method can be recorded on the recording section 7 by the same method as in the above-described embodiment. In FIG. 3,
The other surface of the base sheet 1 can be provided with a printing layer 4 and a surface protection layer 5 similar to those described in the embodiment of FIG.

On the outermost surface including the surface of the metal thin film layer 3 of the thermosensitive recording medium of the present invention, polyvinyl chloride, polyvinyl chloride-vinyl acetate copolymer resin, polyolefin resin, polyester resin (saturated polyester) , Unsaturated polyester), thermoplastic resins, thermo-crosslinkable curable resins,
Alternatively, it is possible to appropriately apply a surface protective layer using these mixed resins.

The recording section 7 which is recorded via the thermal head 6 based on predetermined information includes characters, numerals,
The symbol information may be recorded and displayed as it is in the recording unit 7 in the same font, but in order to provide confidentiality, the characters, numerals, and symbol information to be recorded are determined by a predetermined code mark, collation or personal identification code. After the conversion into the mark, the mark can be recorded and displayed as the recording unit 7.

The heat-sensitive recording material of the present invention is a credit card,
It can be used as a card-shaped information recording medium that records necessary information such as shopping card, member's card, issuer code, expiration date, owner code, personal identification code, verification code, etc. Manufacturer code,
It can be used as a recording body for displaying an article identification code, a price, or the like, or as a label attached to these articles to display a shipping source code, a shipping destination code, a seal-shaped recording body, or the like.

[0029]

In the thermal recording medium A of the present invention, the metal thin film layer 3 is laminated on the base sheet 1 with the resin layer 2 interposed therebetween, so that the heating medium of the thermal head is brought close to, in contact with, or pressed against the metal thin film layer 3. By contact, the metal thin film layer 3 is heated by the heating medium, and the underlying resin layer 2 is also heated, and the resin layer 2 once melts while holding the metal thin film layer 3 on the upper side. A recording portion 7 having fine irregularities is obtained on the surface of the metal thin film layer 3 due to a difference in thermal expansion / contraction ratio between the resin and the metal, or by pressing a heating medium.

[0030]

The heat-sensitive recording material of the present invention has a durability and a falsification-preventing performance for recorded information, and in particular, the surface of the metal thin film layer of the recording portion has a beautiful metallic luster and has a good appearance. With a relatively simple recording mechanism and reading mechanism, necessary information can be reliably recorded and read,
Also, by converting the information to be recorded into a predetermined code number or symbol and recording it, confidentiality can be enhanced.
When used in combination with an electronic recording system such as a C card, security can be further improved.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an embodiment of a thermosensitive recording medium of the present invention.

FIG. 2 is a side view of a case where the thermal recording medium of the present invention is recorded by a thermal head.

FIG. 3 is a side view of another embodiment of the thermal recording medium of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base sheet 2 ... Resin layer 2a ... 1st resin layer 2b
... second resin layer 3 ... metal thin film layer 4 ... printing layer 5 ... surface protection layer 6 ... thermal head 6a ... housing 6b ...
Stroke pin 6c Heating tip 7 Recording part 8
Light absorbing layer A: Thermal recording medium m: High reflection area n: Low reflection area

Claims (2)

(57) [Claims] 1. A resin layer 2 is laminated on one or both sides of a base sheet 1, and a heating pin or a hot pressing mold is brought close to or in contact with or pressed against the surface to melt the resin layer 2 so that fine irregularities are formed. thermosensitive recording material <br/> recording unit having a low reflection region of the light diffusing performance and the thin metal film reflective layer 3 formed on the surface, characterized in that it is laminated on the resin layer 2. 2. A resin layer 2 is provided on one or both sides of a base sheet 1.
Stacked, approaching the heating pin or hot pressing mold to the surface
Alternatively, the resin layer 2 is melted by contact or pressure contact.
Low reflection with light diffusion performance with finer unevenness and thinner
Metal thin film reflective layer 3 having a recording portion having a region formed on the surface
Is laminated on the resin layer 2, and the base sheet of the resin layer 2 is
1 side or the metal thin film reflective layer 3 side or the resin layer 2
On both sides, light absorption due to thinning of the metal thin film reflective layer 3
To form the recording section with a low reflection area with high performance
Wherein the light absorbing layer 8 is laminated .