JP2003205375A - Method of forming engraved letter on label with laser beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of forming an engraved letter on a label with a laser beam by elaborating an engraving accuracy and an engraving depth. <P>SOLUTION: In the method by which a back face coloring ink layer 3, an aluminum vapor-deposition layer 4 and an adhesive layer 5 are formed on the back side of a transparent base plate film 2, a front face coloring ink layer 6, a coloring letter ink layer 7 and a transparent cover film 8 are stacked on the front face side of the transparent base plate film 2 to form a label 1, and an engraved letter is formed by using a laser beam from the front face side of the label 1, the method is characterized by the fact that such processes are taken as an output confirmation process in which the engraving work of the engraving letter is started after a stable laser output is assured by preliminarily running a laser oscillator and a depth adjustment process in which the deepest part 9a of a dot engraving of an engraved letter stays at the position of the transparent base plate film. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an engraved character on a label by using a laser. More specifically, a computer, a label formed by laminating polyester films (hereinafter simply referred to as “PET film”) and the like on a label is provided with letters, symbols, numbers, logos, etc. "Engraved character") is engraved using a laser.

[0002]

2. Description of the Related Art It has been widely practiced to display "number" or the like, which means the color number of cosmetics, on a label. However, the method of forming a stamped character by using a laser on a label has not been adopted at all.

[0003]

[Problems to be Solved by the Invention] Conventionally, a "label number" indicating a color number of a cosmetic is displayed on a cosmetic label, and a user of the cosmetic product should rely on this "number" to purchase. I chose the color of the cosmetics. By the way, it has been widely used to display "number" etc. on a label by printing means, but when using this label in a cosmetics manufacturing factory, etc., before using all the labels that are planned to be used. It was necessary to make and prepare in advance.

Therefore, in the case of a label used for a small amount of a wide variety of products, the number of labels assortment increases, which lowers the material turnover ratio, and when the "number" is abolished, the label is already manufactured. There was a problem that the label became unnecessary and it wasted to discard the label in an unused state, and due to such circumstances, the inventory management work of the label became complicated. .

On the other hand, in the case of forming the engraved characters by laser, the engraved characters can be formed immediately before the use of the label in the working process, that is, after the planned use is confirmed.
It is possible to avoid the situation of having unnecessary labels in stock.

However, when the engraved characters are formed by the laser, the label is subjected to special processing so that the quality of the label is not different from the case where the label is produced by the conventional printing means. Is also a condition, and it is also a condition to adjust the position of the deepest part of the engraved character to be engraved by the laser.If both of these conditions are not cleared, the label of the gold engraved character obtained by the printing means is secured, for example. There was a problem that I could not do it.

The present invention provides a method for forming an engraved character on a label by using a laser, which is devised in consideration of the constitutional aspect of the label and the engraved depth management aspect of the engraved character. It tries to eliminate all the problems.

Further, in order to form an engraved character using a laser, a laser emitted from a laser oscillator (an example of a typical laser oscillator is shown in FIG. 2) is used. YAG laser, CO
2 Lasers and semiconductor lasers are known. In addition,
A CO2 laser is preferable as the laser used in the present invention.

[0009]

In order to achieve the above-mentioned object of the present invention, the first aspect of the present invention is that a backside coloring ink layer is laminated on the backside of a transparent substrate film, and an aluminum vapor deposition layer is formed on the backside of the backside coloring ink layer. To form a glue layer on the back surface of the aluminum vapor deposition layer, a surface coloring ink layer is laminated on the front surface side of the transparent substrate film, a colored character ink layer is laminated on the surface of the surface coloring ink layer, and In the method of forming a label by laminating a transparent cover film on the surface of this colored character ink layer, and forming engraved characters from the surface side of this label by using a laser, a laser oscillator is preliminarily operated and a stable laser is generated. After confirming that the output is secured, start the engraving of the engraved character, and make sure that the deepest part of the dot engraving of the engraved character remains at the transparent substrate film position. A method of forming a marking character on the label by the laser, characterized in that through the depth adjustment step of.

According to a second aspect of the present invention, there is provided a method for forming an engraved character on a label by a laser according to the first aspect, wherein the backside coloring ink layer is colored yellow.

According to the method for forming a stamped character on the label by the laser according to the present invention described above, the stamped character that is easy to see is reliably formed, and the stamped character displayed on the label is a black background with gold characters floating in gold. Since it can be displayed so that it rises, it looks as good as a gold label created by conventional printing means.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for forming an engraved character on a label by a laser according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a label 1 used in the present invention.
It is a longitudinal cross-sectional view explaining a state of forming a stamped character by a laser. Further, Table 1 below describes the structure of the label.

[0014]

[Table 1]

The transparent substrate film 2 is formed of a transparent PET film and constitutes the main body of the label 1. A backside colored ink layer 3 is laminated on the backside of the transparent substrate film 2 (about 40 to 70 μm thick).

Further, an aluminum vapor deposition layer 4 is formed on the back surface of the back surface coloring ink layer 3. The aluminum vapor deposition layer 4 can be formed by a general aluminum vapor deposition method,
By forming the aluminum vapor deposition layer 4, light entering from the front surface side of the transparent substrate film (that is, the front surface side of the transparent cover film 7) is transmitted through the transparent substrate film 2 and the backside coloring ink layer 3 to form the aluminum vapor deposition layer. 4 and is reflected at the aluminum vapor deposition layer position. Therefore, when the engraved character 15 is viewed from the front surface side of the transparent substrate film 2, the color of the backside coloring ink layer is more vividly projected because of the presence of the aluminum vapor deposition layer 4.

A glue layer 5 made of an appropriate adhesive is formed on the back side of the aluminum vapor-deposited layer 4, and the glue layer 5 is prevented from being dried until it is used, if necessary. A protective release paper (not shown) is attached to prevent the adhesive layer from accidentally adhering to an unintended position.

On the other hand, on the surface side of the transparent substrate film 2, a surface coloring ink layer 6 made of, for example, black is laminated. Further, on the surface side of the surface coloring ink layer 6,
A colored character ink layer 7 for printing immovable characters is laminated, and a transparent cover film 8 is further laminated on the surface side thereof so as to be located at the outermost layer.

The surface coloring ink layer 6 is the transparent substrate film 2
It is provided for the purpose of masking and simultaneously forming the background color of the colored character ink layer 7. Further, the colored character ink layer 7 is a portion corresponding to a universal display such as immovable characters of the label 1 (for example, a sales company name, a manufacturing factory name, etc., and naturally, a display such as the number of cosmetics is displayed. Is for forming a display of a portion by a printing means, and the color of the colored character ink layer 7 can be freely selected. Depending on the color adopted by the colored character ink layer 7, the color of the surface colored ink layer 6 which becomes the background background color is naturally selected to be preferable.

As described above, the label 1 used in the present invention, when viewed from the front surface side, first has a transparent cover film 7, a colored character ink layer 7, a surface colored ink layer 6, a transparent substrate film 2, a back surface colored ink. Layer 3, Aluminum vapor deposition layer 4,
The glue layers 5 are laminated in this order (see FIG. 1).

FIG. 2 is an explanatory view showing the structure of the laser oscillator 11 of the CO 2 laser, which is the computer control unit 1.
A laser is generated in the oscillator 11 by sending an electric signal from 0, the laser is amplified while being reflected between the reflecting mirrors 12a and 12b, and finally a high-power laser 14 is emitted from the emission port 13. .

The laser 14 is used to form the engraved characters 15 on the transparent substrate film 2 of the label 1. The engraved characters 15 include the number of cosmetics, the code number of the product, a favorite word, etc. The content may be any form such as kanji, hiragana, katakana, roman letters, numbers, symbols, logos, etc., and when the engraved character 15 specified there is to be concretely formed. Is registered in advance in the computer control unit 10, and thereafter, the engraved character 15 is automatically formed according to a command from the computer control unit 10.

At the time of starting the engraving of the engraved character 15, the output of the laser 14 emitted from the laser oscillator 11 is unstable immediately after the laser oscillator 11 is started. Therefore, the laser oscillator 11 is stable until the output is stabilized. Continue the preliminary operation of. In this way, preparation for marking is performed through the output confirmation step for confirming the stability of the laser output, but the output can be confirmed by the computer control unit 10. In this way, the preliminary operation is continued until it is confirmed that the laser output is stable. At that time, if necessary, check and replace the light source lamp and substrate of the laser oscillator, and also consider voltage adjustment etc. Prepared.

Here, the laser engraved character 15 is
When observed with a microscope capable of measuring in units of 0.01 μ, it can be understood that the marking character 15 is composed of an assembly of small dot markings 9. First, (a) and (b) of FIG.
An enlarged plan view and an enlarged vertical cross-sectional view in the case of a non-defective product in which the engraved character 15 is proper are shown (c) and (d).
An enlarged plan view and an enlarged vertical cross-sectional view in the case of a defective product in which is inappropriate are shown. It can be seen that in the case of a defective product, the dot marking 9 is non-uniform, but in the case of a non-defective product, the dot marking 9 is uniform.

After the above-mentioned preparation, when the stability of the laser output is confirmed, the output confirmation step is completed, and thereafter, the stable laser 14 is fired toward the transparent substrate film 2 and the engraved character 15 is formed. As will be formed, the deepest portion 9a of the dot marking 9 of the marking character 15 to be marked by the laser 14 is adjusted in the depth adjusting step so that it remains at the position of the transparent substrate film 2. Reference numeral S1 indicates the depth dimension of the engraved character 15.

First, when the laser 14 is emitted to the label 1, the corresponding portions of the transparent cover film 8, the colored character ink layer 7, the surface colored ink layer 6, and the transparent substrate film 2 in the portion irradiated with the laser 14 are melted and engraved. The setting character 15 is formed.

Here, the deepest part 9 of the dot marking 9 of the engraved character
Since a is adjusted in depth so as to remain at the position of the transparent substrate film 2, the engraved character 15 is displayed in the color adopted in the backside coloring ink layer 3 when viewed from the front side of the label 1. Here, if the background color of the backside coloring ink layer 3 is colored especially yellow, the effect that the engraved character 15 looks like gold can be achieved, and in this sense, a conspicuous label can be obtained.

When the preferred depth dimension S1 up to the deepest portion 9a of the dot marking 9 of the marking character 15 is secured by the depth adjusting step, the marking character 15 becomes clear and easy to read. When the front surface coloring ink layer 6 is colored black, for example, the background color of the label dyed in black is used as a background, and the desired color of the back surface coloring ink layer 3 (especially yellow is preferable) is transmitted to make the marking easy to read. Characters 15 are obtained, and the immovable character portion is displayed by the colored ink layer 7, and the engraved character and immovable character portion are protected by the transparent cover film 8 to ensure a label that is easy to see.

Further, in the present invention, the label 1 is conveyed to the irradiation position of the laser oscillator 11 by a supply conveyor (not shown), and the laser leaks to the carry-in and carry-out portions of the label 1 on the supply conveyor. Providing a safety cover (not shown) to prevent this ensures safety management of the work for forming the engraved character.

[0030]

As described above, according to the method of forming the engraved characters on the label by the laser according to the present invention, the laser output is stable and the variation is small in the output confirmation step for the specially constructed label. After confirming that, the marking character starts marking, and the depth adjustment process of the marking character dot marking makes it easier to see the marking character and the marking character part is vividly expressed in a conspicuous color. Therefore, it is possible to achieve excellent effects such as obtaining a product which is comparable to the level obtained by the conventional printing means.

Further, according to the method for forming a marking character on a label by the laser according to the present invention, it is possible to achieve the effect that the safety management of the forming operation of the marking character is ensured.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part for explaining a marking work state in a method for forming a marking character on a label by a laser according to the present invention.

FIG. 2 is a vertical sectional view showing the structure of a laser oscillator of a CO 2 laser.

FIG. 3 is an enlarged plan view of a main portion of a stamped character portion.

FIG. 4 is an enlarged view of a main part of a stamped character portion, showing (a) and (b).
Is a plan view and a vertical sectional view in the case of a non-defective product, and (c)
(D) is a plan view and a vertical sectional view in the case of a defective product.

[Explanation of symbols]

1 ... Label 2 ... Transparent substrate film 3 ... Back coloring ink layer 4 ... Aluminum vapor deposition layer 5 ... glue layer 6 ... Surface coloring ink layer 7 ... Colored character ink layer 8 ... Transparent cover film 9 ... dot engraving 9a ... The deepest part of the dot marking 9 ... Engraved characters 9a ... Deepest part of engraved character 10 ... Computer control unit 11 ... Laser oscillator 12a, 12b ... Reflecting mirror 13 ... Launching port 14 ... Laser 15 ... Engraved characters S1 ... Dot marking depth

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B41M 1/30 B41J 3/00 Q 5/26 B41M 5/26 S (72) Inventor Yasuhide Sugimoto Tokyo Itabashi 2-16-1, Kaga, Ku, Shiseido Kako Co., Ltd. (72) Inventor Mitsuharu Kimura 2-16-1, Kaga, Itabashi-ku, Tokyo (72) Inventor, Satoshi Hirama 2-chome, Kaga, Itabashi-ku, Tokyo No. 16-1 Shiseido Kako Co., Ltd. (72) Inventor Kozo Endo 2-16-1 Kaga, Itabashi-ku, Tokyo Shiseido Kako Co., Ltd. (72) Inventor Yoshinori Tanaka 2-16-1 Kaga, Itabashi-ku, Tokyo No. Shiseido Kako Co., Ltd. (72) Inventor Naoki Maekawa 2-16-1, Kaga, Itabashi-ku, Tokyo Inside Shiseido Kako Co., Ltd. (72) Masaki Ito Oamibaku, Sanmu-gun, Chiba Prefecture Machiyanagibashi 31 (72) Inventor Aiko Teramoto 4-23, Senjodaidai, Wakaba-ku, Chiba, Chiba Prefecture, 8th F-term (reference) 2C362 AA02 CB67 2H111 HA14 HA23 HA32 2H113 AA01 AA04 AA06 BB08 BB22 BB32 CA15 DA04 4E068 AB01 CA02 DB10 DB10 CA02 DB10 DB14 4F100 AB10 AB10C AK01A AK01E AK42 AR00D BA04 BA05 BA07 BA10D BA10E CB00 EC18D EH66 EH66C EJ53 GB90 HB00B HB00E HB31B HB31E HB35E JL05 JL10B JL10E JN01A JN01E

Claims (2)

[Claims] 1. A transparent substrate film is provided with a backside coloring ink layer on the backside thereof, an aluminum vapor deposition layer is formed on the backside of the backside coloring ink layer, and a glue layer is formed on the backside of the aluminum vapor deposition layer. A label is formed by laminating a surface coloring ink layer on the surface side of the substrate film, laminating a coloring character ink layer on the surface of this surface coloring ink layer, and further laminating a transparent cover film on the surface of this coloring character ink layer. Then, in the method of forming engraved characters using a laser from the surface side of this label, check the output that starts engraving of engraved characters after confirming that a stable laser output is secured by pre-operating the laser oscillator. Laser-based leveling, characterized by undergoing a process and a depth adjustment process so that the deepest part of the dot marking of the marking character remains at the position of the transparent substrate film. Method of forming engraved characters on the card. 2. The method for forming an engraved character on a label by a laser according to claim 1, wherein the backside coloring ink layer is colored yellow.