JP2012173430A - Hologram label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which since a hologram label is used to certify the authenticity of an object to be stuck after the hologram label is stuck to the object to be stuck, if the label is illegally peeled off and may be used for sticking again to the other object to be stuck which is unauthentic, it becomes impossible to maintain the certification.SOLUTION: A hologram label is obtained which has such an effect that when the label is to be peeled off, only a transparent substrate is easily peeled off, predetermined characters are displayed and the "pattern" stands out in a hologram reproduction image by subjecting one surface of the transparent substrate constituting the hologram label to an activation treatment or an inactivation treatment. The hologram label is capable of maintaining the authenticity.

Description

The present invention relates to a hologram label, and more particularly to a hologram brittle label that forms a brittle hologram that is difficult to forge or falsify by re-attaching a hologram.
In the present specification, “parts” indicating blending are based on mass unless otherwise specified. The “hologram” includes a hologram and a hologram having a light diffractive function such as a diffraction grating.
Furthermore, the “adhesive strength” is an adhesive strength obtained by a 180 ° peel test specified in JIS Z0237.

(Main application) The main application of the hologram label of the present invention is a hologram label used in the field of anti-counterfeiting or design, and specifically,
(1) Various product fields, such as genuine products manufactured by manufacturers, where certification of genuine products is significant, such as electronic equipment, electrical equipment, computer-related products, and their components, computer-related software, genuine equipment (paper Consumables such as printers and toner etc.) Pharmaceuticals, quasi-drugs, chemicals, etc.
(2) Fields where consumers are strongly required that the product itself is a genuine product, or affixing a label to improve designability, indicate that the product is expensive, and increase the added value of the product Fields, such as books, documents, lectures, plays, movies, photographs, paintings, sculptures, prints, drawings, models, etc., or edits thereof, or those recorded on a recording medium (video cassette, compact disc, digital video Works such as discs), ROM boards that have been set and prevented from being changed (used for computer equipment, game machines, game machines, etc., including stickers across ROM and boards), watches, Clothing, bags, jewelry such as jewelry, sports equipment, cosmetics, and their luxury brand products,
(3) Identification method (ID card) field, such as passport, driver's license, insurance card, membership card, identification card, resident registration card, hospital card, library card, etc.
(4) Fields that are required to be genuine in order to maintain economic order, such as gift certificates, gift certificates, etc., or prepaid cards, credit cards, cash cards, etc.
(5) Further, the field of packaging these items and sealing the packaging, for example, the field of simply storing or putting them in an envelope as mail or small parcels, or delivering and delivering them in a package, Fields that sell products in packages, fields that are simply packaged, fields that are used as seals for seals, fields that are affixed to prove their authenticity in their instructions and efficacy documents, etc.
In particular, the present invention is suitable for a field in which the hologram label is skillfully removed to reduce the value of the hologram label or to be reused.

(Prior Art) In recent years, development of a hologram capable of reproducing a three-dimensional image using light interference has progressed, and this hologram requires advanced manufacturing technology and can be formed into various forms such as labels, seals, and foils. Therefore, it is applied and applied to a part of various things including the above-mentioned field as a forgery prevention means by applying this. This hologram has been widely used because it can be seen at a glance whether it is genuine or not and is difficult to manufacture as described above.
These are peeled off after being affixed to the article, and are peeled off by the support and the hologram layer, or the release layer provided between them and the support or the hologram layer so as not to be misused. In some cases, the entire hologram is destroyed when it is intentionally peeled off. In particular, as in the hologram brittle seal disclosed in Japanese Utility Model Publication No. 5-48210, a support and a hologram forming layer are laminated via a patterned release layer, and a reflective metal thin film layer and an adhesive are formed on the hologram formation. Laminate the layers one after another and cut them into the required size and shape for use. Forgeries such as certificates and identification cards, adherends that do not want to be altered (also called adherends), sealed letters, etc. There is one that is applied to the sealing part by applying pressure to the sealing part while heating. (See Patent Document 1.)
When the hologram label once attached to the adherend in this way is peeled off, the hologram is destroyed at the boundary section between the release layer portion and the non-release layer portion, and the hologram is formed on the support and the adherend. Since the label remains separated and cannot be peeled off as it is, the hologram label cannot be replaced with another article, and the hologram label is covered by the difficulty of counterfeiting or altering the hologram itself. The authenticity of the kimono can be guaranteed.

Therefore, in order to rewrite the description items and the imprint photo of the place where the hologram label is pasted, it is necessary to remove the remaining part of the label, and it is difficult to forge or alter it. Further, since the hologram remains only in a pattern on the support, it is impossible to replace the label, and the opening of the sealed portion can be easily recognized by the hologram remaining in the pattern on the adherend.
Therefore, the hologram label of the present invention can be applied not only to an adherend that is not to be forged, but also as a seal of a package, and furthermore, the hologram label can be used as a decorative decoration.
However, the former holographic brittle seal of the former type is abused because the hologram layer and the reflective thin film layer are not destroyed depending on how they are peeled off, and the entire hologram seal is completely peeled off and can be reused as a result. There is a possibility. Therefore, as a method for destroying the hologram layer and the reflective thin film layer itself, there is a method disclosed in Japanese Utility Model Publication No. 5-48210. However, in this method, when the hologram brittle seal is attached, Since the pattern-like release layer is provided, the presence of the pattern can be easily visually determined, which not only affects the appearance of the reproduced image of the hologram, but also reveals the existence of anti-counterfeiting measures. Have a problem.
In order to solve this problem, JP-A-8-152842 proposes a method of providing a brittle release layer between the reflective thin film layer and the adhesive layer. If the strength of the layer is large, the difference in adhesive strength with the base material, or the presence of brittle releasability, the hologram forming layer itself will not break, or there will be a mixture of those that will break and those that will not break. Could not be achieved sufficiently. (See Patent Document 2.)

Japanese Utility Model Publication No. 5-48210 JP-A-8-152842

In the present invention, when applying a hologram label as a label to an adherend (also referred to as sticking), the hologram label can be attached without any problem, and an attempt is made to illegally remove the hologram label from the adherend. Then, only the label substrate is peeled off, and as a peeled trace, what remains on the adherend side (hologram forming layer, reflective thin film layer, and adhesive layer) is clearly visible message such as “open” A hologram label on which (pattern) is displayed is provided.
The present invention has been made in view of the above-described conventional problems, and the object of the present invention is to reliably prevent the hologram seal from being replaced by an unauthorized peeling action and to be partially brittle. An object of the present invention is to provide a hologram brittle seal in which it is difficult to find the presence of a layer to be destroyed (a mechanism for partially breaking).

To solve the above problem,
The first aspect of the hologram label of the present invention is:
A hologram forming layer having a hologram relief provided so as to cover the activation processing region on a transparent substrate having a pattern-shaped activation processing region, so as to follow the hologram relief of the hologram forming layer The provided reflective thin film layer and the pressure-sensitive adhesive layer are provided in this order, and the pressure-sensitive adhesive layer is formed by alternately forming two types of pressure-sensitive adhesives having different adhesive strengths. .
According to the hologram label of the first aspect,
A hologram forming layer having a hologram relief provided so as to cover the activation processing region on a transparent substrate having a pattern-shaped activation processing region, so as to follow the hologram relief of the hologram forming layer A hologram label characterized in that the provided reflective thin film layer and the adhesive layer are provided in this order, and the adhesive layer is formed by alternately forming two types of adhesives having different adhesive strengths. Can be provided,
When the hologram label is attached to the adherend, there is a difference in the adhesive strength with the adherend between areas where two types of adhesives with different adhesive strengths are formed. It is possible to provide a hologram label in which the hologram forming layer is likely to be broken when it is carried out, it is possible to reliably prevent replacement, and it is difficult to find the presence of a pattern displayed at the time of peeling. it can.
The second aspect of the hologram label of the present invention is:
A region other than the pattern activation treatment region on the transparent substrate is an inactivation treatment region.
According to the hologram label of the second aspect,
A region other than the pattern activation treatment region on the transparent substrate is an inactivation treatment region, and the hologram label of the first aspect can be provided, and illegal peeling is performed. It is possible to provide a hologram label that can make it easier to break the hologram-forming layer when it is broken.
The third aspect of the hologram label of the present invention is:
The pattern is constituted by a set of fine patterns.
According to the hologram label of the third aspect,
The pattern can be provided by the hologram label according to the first aspect or the second aspect, characterized in that the pattern is constituted by a set of fine patterns, and the hologram is obtained when illegal peeling is performed. It is possible to provide a hologram label that is more likely to break the forming layer and that makes it difficult to find the presence of a pattern displayed at the time of peeling.

The fourth aspect of the hologram label of the present invention is:
The fine pattern has a halftone dot shape, the size and arrangement of the halftone dot shape of the fine pattern, and the two types of pressure-sensitive adhesives at positions corresponding to the pattern of the pressure-sensitive adhesive layer. Among the formation regions, the size and arrangement of the formation region of the pressure-sensitive adhesive having the smaller adhesive strength are the same.
According to the hologram label of the fourth aspect,
The fine pattern has a halftone dot shape, the size and arrangement of the halftone dot shape of the fine pattern, and the two types of pressure-sensitive adhesives at positions corresponding to the pattern of the pressure-sensitive adhesive layer. The hologram label of the third aspect can be provided, in which the size and arrangement of the formation region of the adhesive having the smaller adhesive strength among the formation regions are the same, and unauthorized peeling can be provided. It is possible to provide a hologram label that can further easily cause a rupture of the hologram forming layer when performed.
That is, the hologram label has a pattern-like activation treatment area (and also has an inactivation treatment area) on one surface of the transparent substrate, and the pattern-like activation treatment area On the surface, a hologram forming layer having a hologram relief, a reflective thin film layer, and an adhesive layer in which two types of adhesives having different adhesive strengths are alternately formed are formed in this order, In the above-described use of the hologram label, it is attached to a part of a desired adherend or a sealed part such as an envelope.
“Adhesive layer in which two types of adhesives are alternately formed” means that when one adhesive layer is formed of two adhesives, adhesive 1 and adhesive 2, the “adhesive layer forming surface” (reflection) The adhesive thin film layer and the adhesive layer is divided into regions, for example, in a checkered pattern, and the adhesive 1 or the adhesive 2 is formed in a single pattern on the grid. means. Of course, this "region division shape" may be a dot shape, a polygonal shape, or an indefinite shape.
However, as will be described in detail below, the boundary line between the adhesive 1 and the adhesive 2 having different adhesive strengths is a “trigger” that causes the hologram label to break. It is desirable that it is uniformly distributed on the “formation surface” (meaning that it exists without unevenness), and “the shape of the area division” is “a fixed shape” rather than “a random shape”. Is preferable.
In addition, when the adhesive layer is visually recognized, the transparency of the adhesive 1 and the adhesive 2 is the same so that the “region division shape” (checkered pattern or halftone dot) cannot be visually recognized. Or, even if there is a difference in transparency and color tone, the area division of the two types of adhesives is made “uniform” to make it look like a so-called “background pattern”. It is preferable to make it difficult to discover that it is a mechanism (partial destruction mechanism).
This hologram label is peeled off from the adherend or sealed part without leaving a sticking trace, and the hologram label is peeled off in a completely original state, and is replaced with another adherend prepared illegally. Or after opening the envelope or box and replacing the contents, the contents of the adherend, envelope or box are claimed to be authentic, or the original hologram label is peeled off. In order to prevent fraud, such as reducing its value,
Although it is desirable that the transparent base material and hologram forming layer of the hologram label are ruptured, the rupture strength of the base material of the hologram label and the hologram forming layer is very large, and the adhesive strength as a label (180 ° defined in JIS Z0237) In the peel test, 0.1 to 2.0 kg / 25 mm width)), it is difficult to break these layers 100%.

Therefore, one surface of the transparent substrate is activated (means surface treatment; hereinafter used for the same meaning), and the hologram forming layer formed so as to cover the region is transparent in the region. Adhesiveness between the base material and the hologram forming layer is improved, the adhesive strength is 0.5 kg / 25 mm width or more and 3.0 kg / 25 mm width or less (according to 180 ° peel test specified in JIS Z0237), and adhesive. By alternately forming two types of adhesives with different adhesive strengths,
The adhesive strength between the adhesive layer and the adherend is defined as “parts having a large adhesive strength” and “parts having a small adhesive strength” for each alternate region in which two types of adhesives are formed. When the transparent substrate is peeled off in an attempt to illegally peel off the hologram label from the adherend, the boundary line between the two adhesives (the boundary line between the adhesive 1 and the adhesive 2 having different adhesive strengths) ) Means “trigger” so that the hologram forming layer is easily broken.
As the “pattern” to be activated, any desired visible pattern (characters, figures, symbols, etc.) can be used. Typically, the evidence that the hologram label is peeled off is used. In order to display characters such as “open”, the image line portion of the “open” character is activated (this is the “patterned activation region”). .
Since the size of the “pattern” is such that the display content can be visually recognized, if the character is “open”, the character height is preferably 2 mm to 30 mm.
For this reason, the image line width is 0.1 mm to 5 mm on average.
In order to reliably break the hologram forming layer in this “pattern shape” (for example, this breakage may be “recognizable” by visually recognizing the characters “open”). It is clear from the purpose that it is not necessary to precisely break to the tip of “jump” or “splash”.) The above-mentioned “trigger” is the image area of this pattern (especially, It is necessary to exist at the boundary part.) Of the two types of adhesives, the size of each area occupied by the adhesive with the lower adhesive strength (in the case of a checkered pattern, one square It means the size of an eye, and in the case of a halftone dot, it means the diameter.) Is a size of 1/2 to 1/10 of the line width.
For example, in the case of a checkered pattern, the shape of the pressure-sensitive adhesive is such that square pillars having the bottom faces of individual cells are forested in a predetermined arrangement.
The space between the forested square columns is filled with another adhesive to form one adhesive layer. Alternatively, the other pressure-sensitive adhesive may be a quadrangular column, and two types of quadrangular columns may be erected to form one pressure-sensitive adhesive layer.

When a hologram label having such an adhesive layer is affixed to an adherend, the reflective thin film layer and the adhesive, and the adhesive and the adhesive are adhered to each area occupied by the adhesive having the higher adhesive strength. In each region where the adhesive with a lower adhesive strength occupies a strong adhesive force with the adherend, the reflective thin film layer and the adhesive, and between the adhesive and the adherend A weak adhesive force will work.
If the size of each area occupied by the adhesive with the smaller adhesive strength is larger than half of the line width, the hologram forming layer should not break, and the pattern line boundary and break The part that overlaps the periphery of the region (for example, the part where the border of the image line and one side of the adhesive cell overlap substantially) The effect of dividing the area is not fully demonstrated. (The border line of the image line means a “pattern” such as a character, that is, a “line” surrounding the “image area” in the “image area” of the character or the like.)
In that sense, it is desirable that the size of each region is small. However, when the size is smaller than 1/10 of the line width, for example, the cross-sectional size is 0.01 mm with respect to the minimum line width of 0.1 mm. Therefore, it is difficult to stably form the region division itself.
That is, when the width of the image area (for example, the average value of the widths of the individual lines of the characters “opened”) is 0.1 mm to 5 mm, the pressure sensitive adhesive having the smaller adhesive strength occupies each. The size of the area is set to 0.01 mm to 2.5 mm. Preferably, it is 0.05 mm to 0.5 mm.
The thickness of the adhesive layer (for example, the height of a cylinder or a quadrangular prism) is determined by attaching the hologram label to the adherend and applying pressure firmly to the adherend. It is desirable that the surface is sufficiently in contact with and adhered to the surface, and the thickness is set to 5.0 μm to 30.0 μm.
When an attempt is made to peel off the hologram label, the adherend and the adhesive are firmly adhered to each other in the individual areas occupied by the adhesive having the higher adhesive strength, and the reflective thin film layer, and further the hologram Since it is firmly bonded to the forming layer, this region becomes a portion pulled toward the adherend.
Moreover, in the individual areas occupied by the adhesive having the smaller adhesive strength, the adhesion between the adherend and the adhesive is weak, and the reflective thin film layer is also weakly adhered. Then, peeling occurs at any one of the interfaces, and the reflective thin film layer, and further the hologram forming layer, is a part that promotes the phenomenon that it is taken (means taken) to the transparent substrate side.
Such a force directed in the opposite direction is generated at the boundary line between the two pressure-sensitive adhesives, and this force is a “trigger” for the breakage of the hologram forming layer and the reflective thin film layer on the boundary line.
The difference between the adhesive strengths of these two types of pressure-sensitive adhesives (according to the 180 ° peel test specified in JIS Z0237) is expressed as a ratio of the adhesive strengths and is 5/1 to 10/1.
That is, the adhesive strength of the adhesive having the larger adhesive strength is 1.0 to 2.0 kg / 25 mm width, and the adhesive strength of the adhesive having the smaller adhesive strength is 0.1 to 0.4 kg / 25 mm width. And
If this bond strength ratio is less than 5/1, the effect of “break” as described above is small, and in order to make the bond strength ratio greater than 10/1, 2 A pressure-sensitive adhesive having an adhesive strength exceeding 0.0 kg / 25 mm width is required. However, such a pressure-sensitive adhesive having a high adhesive strength tends to become opaque and has a clear color tone, from the viewpoint of anti-counterfeiting. It is not preferable.
Further, as a method for improving the adhesive strength, it is also preferable to add transparent fine particles such as microsilica to the pressure-sensitive adhesive.

  And when illegal peeling is performed, the hologram forming layer remains in this pattern on the transparent base material having the pattern-like activation treatment area, and the illegal In order to indicate the presence of the act, the peeled transparent substrate (the hologram forming layer or the reflective thin film layer is partially attached), or the remaining part of the adherend ("opened" characters, etc. are extracted) The fraud determination can be easily made by simply glanced at the hologram forming layer, the reflective thin film layer, and the adhesive layer.

For this activation treatment, that is, treatment that greatly enhances wettability, treatment that creates functional groups on the surface, etc., light treatment such as laser irradiation, excimer light irradiation, oxygen-sensitized excimer light irradiation, (open) plasma treatment , Physical treatment such as corona treatment and electron beam irradiation treatment, surface treatment with chemicals such as oxidants, chemical treatment such as primer treatment and silane coupling treatment, physical treatment such as argon beam etching, etchant treatment, and sandblasting A rough surface forming process or the like can be used.
In order to perform the process in a “pattern” shape, a direct drawing method (a method of scanning a processing beam such as laser irradiation), a masking method (shielding with a “pattern” metal plate, A method of masking a portion not to be processed by applying a masking agent in the form of “and processing the entire surface.)”.
When the transparent substrate is peeled off in order to peel off the hologram label, only the activated portion, that is, for example, the character portion (image portion) of “open”, the surface of the hologram forming layer is formed on the transparent substrate. By peeling off while adhering, the letters “open” appear as “open letters” on the adherend after peeling.
In this case, the hologram reproduction image is observed as being blocked by the characters “open”.
Since the hologram reproduction image has very high redundancy, this interruption (meaning the interruption of the width of the activation processing region, for example, the line width of the character of “open”) has an interference fringe period of 0. 5 μm to 2 μm, 200 times to 2500 times, more preferably 500 times to 1000 times.

If this blockage is less than 200 times, the hologram reproduction image is strongly reproduced due to the redundancy of the hologram, and the blockage is weakened. If this blockage exceeds 2500 times, the transparent substrate becomes difficult to peel off, or the entire hologram label Can be peeled off, and the broken surface is unnecessarily enlarged, making it difficult to obtain an accurate interruption.
The best accuracy of blocking when the transparent substrate is peeled is 500 to 1000 times.
Further, the region other than the pattern-like activation treatment region on the transparent substrate is deactivated (becomes an inactivation treatment region), and the transparent substrate and the hologram forming layer in the activation treatment region are By increasing the difference between the peel strength (also referred to as adhesive strength) and the peel strength (also referred to as adhesive strength) between the transparent substrate and the hologram forming layer in the inactivation treatment region, The hologram forming layer can be surely broken.
In order to form the activation treatment region and the deactivation treatment region side by side on the transparent substrate, they can be formed separately on the transparent substrate, respectively, but after the entire surface of the transparent substrate is activated, Only a predetermined portion may be inactivated, or only the predetermined portion may be activated after the entire surface of the transparent substrate is inactivated.
Among them, a method of activating the entire surface of the transparent substrate once and then inactivating the desired portion from the top is excellent in the shape (formation) accuracy of the “pattern”. It is preferable because of excellent processing fixability (meaning that it is easy to secure and maintain performance).
The deactivation treatment surface on the transparent substrate has a peel strength of 0.01 kg / 25 mm width or more and 0.1 kg / 25 mm width or less. The transparent substrate is peeled off, and the outermost surface of the hologram forming layer after peeling the transparent substrate (meaning the surface in contact with the inactivated surface of the transparent substrate. After peeling the transparent substrate, The surface is exposed and becomes the outermost surface.) Is almost a mirror surface, from which the reproduced hologram image underneath can be clearly seen.

As the inactivation treatment, it is necessary to accurately inactivate only a predetermined portion (meaning a region extending in the surface direction and thickness direction of the transparent substrate),
Only the outermost surface of the transparent substrate is partially dissolved (a method of directly treating the transparent substrate surface), or it reacts with the activated functional group to eliminate the activity of the functional group (once the substrate surface is After the activation treatment, a method of deactivating the activation treatment surface.) Solvents such as ketones (methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.), alcohols (methanol, ethanol, isopropyl alcohol, etc., Furthermore, its aqueous solution.), Aromatics (benzene, toluene, xylene, etc.), esters, ethers (tetrahydrofuran, etc.), etc.
Or, it is difficult to adhere to these transparent substrates in the first place, and resins having a low interfacial tension, such as silicone resins, paraffin resins, fluorine resins, resins containing these fluorinated hydrocarbon groups and organic silicon groups, etc. Among them, a highly transparent material is formed into a pattern with high accuracy by using a method (a method for directly treating the surface of a transparent substrate) of partially forming the desired pattern by letterpress printing or ink jet printing. Inactivate it.
At this time, it is desirable not to give an optical change on the transparent base material by the partial treatment (optical change means that the surface of the transparent base material becomes clouded or roughened unnecessarily. The optical change causes the hologram reproduction image to become unclear and also causes the desired pattern to be recognized unnecessarily.) The solvent etc. is volatilized, and the resin etc. is only surface modified. For this purpose, it is desirable that the thickness of the treated region after drying be about 1/5 to 1/50 of the wavelength of light. Of course, it is also suitable to use these in combination.

Since the inactivation treatment of the present invention uses the printing method described above, a very clear pattern can be formed, and the difference in adhesion strength between the inactivation treatment surface and the activation treatment surface is greatly increased. Therefore, the destruction area can be made clearer.
Of course, the pattern processing using the activation processing and the deactivation processing is optically transparent, and when observing the hologram label, the pattern boundary cannot be visually recognized, and illumination with a laser or the like is performed. However, unnecessary scattering and diffraction do not occur, and the transparency (its continuity) must be maintained.
Among the activation treatments, light treatment such as laser irradiation or physical treatment such as plasma treatment does not generate irregularities on the treated surface of the transparent substrate, maintains a mirror surface, and is excellent in optical transparency. It is particularly desirable because the inactivation effect by the inactivation treatment is large.
Further, in place of the above-mentioned “pattern” being uniformly activated or deactivated (hereinafter also referred to as “activation process” or the like), the “pattern” is made smaller “small” (For example, a collection of “fine patterns” such as halftone dots, checkered patterns, random patterns, etc.), and only the “fine patterns” are activated. (For example, by performing an activation process or the like in a checkered pattern, the inside of the “pattern” is uniformly divided by the grids, and only one skipped part remains as a surface for the activation process or the like.) By adding a checkered pattern strength to the peel strength between the material and the hologram forming layer, the chance to break the hologram forming layer can be increased, and the break can be more easily generated. Concealment Easy to stone, the existence of a "pattern" for the first time displayed at the time of illegal peeling, in advance, can be more difficult to discover.
The individual size of the “fine pattern” is ¼ to 1/20 of the line width of the “pattern”. When the character “open” is “pattern”, the character height is 2 mm to 30 mm, and the image line width is 0.1 mm to 5 mm on average. "(If it is a checkered pattern, it means the size of one square) is 5 μm to 1.25 mm.
If the individual size of the “fine pattern” is larger than ¼ of the line width of the “pattern”, it becomes difficult to recognize the “pattern” itself, and 1/20 of the line width of the “pattern”. If it is smaller than the size, the accuracy of the activation process and the deactivation process is lowered.
Preferably, it is 30 μm to 300 μm.

As the hologram forming layer, various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins can be used as described below, but the method of the present invention has a strength as a film of the hologram forming layer. This is particularly effective when an ionizing radiation curable resin such as ultraviolet curing or electron beam curing is used, which is very strong and very difficult to break the film itself.
After forming an appropriate hologram relief on the hologram forming layer, a reflective thin film layer is formed, and further, an adhesive layer in which two types of adhesives having different adhesive strengths are alternately formed is formed thereon. The hologram label of the invention can be produced.
As a method of forming an adhesive layer in which two types of adhesives having different adhesive strengths are alternately formed,
On the reflective thin film layer, using a silk screen printing method, etc., a low adhesive strength adhesive is formed in a checkered pattern, and then the surface in contact with the adhesive is fluorinated using a stainless screen printing method. Thus, it is possible to use a method in which an adhesive having a high adhesive strength is formed on the vacant part of the checkered pattern.
In this case, the pressure-sensitive adhesive layer is formed using a relatively low-viscosity adhesive having a high adhesive strength so as to fill a gap between the adhesive having a low adhesive strength and the adhesive having a high adhesive strength. Although it may be formed, a gap may be provided between the “pressure-sensitive adhesive having low adhesive strength” and the “pressure-sensitive adhesive having high adhesive strength”.
When the gap is provided in this manner, the two adhesives are not in contact with each other, so that the gap itself functions in the same manner as the above-described “boundary line”, and further, the hologram forming layer is broken. The boundary between the pattern line and the gap that acts as the “boundary line”, which is the “trigger” of the break, increases, and the effect of dividing the area is fully demonstrated. This is preferable.
However, increasing the area of this gap means that the area of the adhesive layer that is adhered to the adherend is reduced, so this gap is less than 1/10 of the size of each region. It is preferable that

In addition, as another method for forming the adhesive layer, once the “adhesive having low adhesive strength” is formed in a checkered pattern on the reflective thin film layer using a silk screen printing method or the like. The “adhesive with high adhesive strength” adjusted to a low viscosity can be formed using a curtain coat method or a nozzle method so as to fill the space between the formation regions of “adhesive with low adhesive strength”. .
Furthermore, on the reflective thin film layer, using a silk screen printing method, etc., "adhesive with low adhesive strength" is formed in a checkered pattern, and on the release paper, "adhesive strength" The adhesive layer can be formed by laminating by laminating by forming the adhesives with a small size in a checkered pattern, making these adhesive surfaces face each other and aligning them alternately. it can. When this method is used, the accuracy of the thickness as the adhesive layer becomes high, and a stable effect can be obtained when sticking to an adherend or “breaking”, which is preferable.
Of course, it is possible to reverse the above-mentioned formation order and previously form a “adhesive with high adhesive strength” on the reflective thin film layer, but due to its high adhesiveness (adhesive strength), In this case, the laminating method described above is most suitable in order to reduce the workability of the subsequent steps. And in order to maintain the formation shape of the adhesive formed previously, it is also suitable to give a hardening agent to an adhesive and to make it harden and to prevent the shape collapse.

In addition, a “pattern” region (a region expressed as an aggregate of fine patterns) formed by a fine pattern activation treatment region on the transparent substrate, and the “pattern” on the transparent substrate. The individual areas of the “adhesive with low adhesive strength” in the position corresponding to the area of the “pattern” (the individual areas of the “adhesive with low adhesive strength” are formed over the entire area of the hologram label. In particular, it means an individual area group in an area immediately below a pattern-like activation treatment area provided on a transparent substrate.) Expressed as a collection of dots, and the size (diameter, etc.) of the “fine pattern” halftone dot and the individual size (diameter, etc.) of the “individual areas of the adhesive with low adhesive strength” )) Is the same as the “fine pattern” Point arrangement (horizontal position within the hologram label, horizontal spacing, etc.) and individual arrangement of “individual areas of adhesive with low adhesive strength” (horizontal direction within the hologram label) , And the horizontal interval, etc.) are made the same, it becomes possible to make it easier for the hologram forming layer to break when it is illegally peeled off.
That is, when trying to peel off the transparent substrate, the hologram forming layer breaks in the “fine pattern halftone dot” portion that is activated and firmly adhered to the transparent substrate and the hologram forming layer, At this time, the broken hologram forming layer is laminated with a similarly broken reflective thin film layer, but the adhesive layer below it Is just “individual areas of“ adhesive with low adhesive strength ”” (because it has a low adhesive strength between the adhesive and the reflective thin film layer and the adhesive and the adherend, The force against the “pulling by the transparent base material” due to the agent works only a little, and it is easily taken to the transparent base side.
In particular, at the boundary of the “pattern” on the transparent substrate (the end of the image line), the inside is a group of “fine pattern” halftone dots that form the “pattern”, and the outside is Since the halftone dot is a region where no halftone dot exists, the above-described breakage occurs reliably and stably at this boundary line. (This means that even if there is no rupture in the area where the individual areas of the first “adhesive with low adhesive strength” are located just inside the boundary line, (It means that a break occurs in a part of each region of the “adhesive having low strength” and further in a part of the individual region of the “adhesive having low adhesive strength” inside.)
After pasting this hologram label at an appropriate position on the desired adherend, if the hologram label is to be peeled off, the transparent substrate is easily peeled off, and the hologram forming layer is broken to the transparent substrate side. The reflective thin film layer and a part of the adhesive layer are attached (showing a pattern such as “open” characters), and on the adherend side, the remaining hologram forming layer and the remaining reflective thin film layer, and A part of the adhesive remains (the pattern is raised so as to show a “white” pattern such as “open” characters and to block the hologram reproduction image by the hologram relief). Clarify that the label has been removed.

  According to the present invention, a transparent substrate is subjected to a pattern activation treatment, and further, the other region is subjected to an inactivation treatment, and a hologram forming layer having a hologram relief thereon, a reflective thin film And a hologram label characterized in that an adhesive layer formed by alternately forming two types of adhesives having different adhesive strengths is provided. After sticking to the adherend, if the hologram label that is not originally peeled off is to be peeled for an illegal purpose, peeling occurs preferentially at the interface between the transparent substrate and the hologram forming layer. Later, a clear message indicating fraud can be displayed, and it is possible to visually and reliably determine that the fraud has been performed.

It is sectional drawing of the hologram label A which shows one Example of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Transparent substrate)
The transparent substrate 1 used in the hologram label A of the present invention can be reduced in thickness, and has mechanical strength and solvent resistance suitable for processing and processing when producing the hologram label A and What has heat resistance is preferable. Since it depends on the purpose of use, it is not limited, but a film-like or sheet-like plastic is preferable.
For example, various plastic films such as polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, and polyethylene / vinyl alcohol can be exemplified. .
And one side of the transparent substrate 1 is activated in a pattern (becomes an activation process region 2), or a region other than the pattern activation treatment region 2 on the transparent substrate 1 is Inactivation treatment (not shown), and further, the entire surface of the transparent substrate 1 is once activated (not shown), and then a desired portion (other than the “pattern”) is formed thereon. By using a method for inactivating the region (not shown), the peel strength between the transparent substrate 1 and the hologram forming layer 3 in the activation region 2, and the other region or The difference between the peel strength between the transparent substrate 1 and the hologram forming layer 3 in the inactivation treatment region can be increased, and the hologram forming layer can be broken more reliably. (See Figure 1)
The thickness of the transparent substrate 1 is usually 5 to 250 μm, but is preferably 25 to 100 μm for proper handling as a “label”.
Further, a transparent resin may be coated on one surface of the transparent substrate, and the above-described effects may be obtained by performing the above-described treatment on the transparent resin. In addition to the above resin group, the resin used for the hologram forming layer described below can be used for this transparent resin.

Furthermore, for the purpose of expanding the difference in peel strength between the activation treatment surface and the deactivation treatment surface, a transparent resin formed as a protective layer on the hologram forming layer 3 and having peelability from the transparent substrate 1 is used. It may be provided. Also in this case, as the transparent resin, in addition to the resin group described above, a resin used for the hologram forming layer 3 described below can be appropriately used.
Of course, in consideration of environmental impact, a transparent biodegradable plastic film or sheet can also be used. As a chemical synthesis system, a lactone resin: ε-caprolactone, 4-methylcaprolactone, 3, 5, 5 -Trimethylcaprolactone, 3,3,5-trimethylcaprolactone, β-propiolactone, γ-butyrolactone, δ-valerolactone, a homopolymer of enanthlactone or a copolymer of these two or more monomers, a mixture thereof, polycaprolactone Or, polybutylene succinate resin: polybutylene succinate adipate, a mixture of polybutylene succinate and polycaprolactone, a mixture of polybutylene succinate and polybutylene succinate adipate, polybutylene succinate adipate A mixture of polylactic acid, or a polylactic acid, a mixture of polylactic acid and D-lactic acid, or a polyester resin synthesized from a low molecular weight aliphatic dicarboxylic acid and a low molecular weight aliphatic diol, such as succinic acid and butanediol, ethylene Polymerization by adding aliphatic isocyanate to a mixture of modified polyvinyl alcohol, aliphatic polyester resin and starch, low molecular weight aliphatic polyester, such as combinations with glycols, oxalic acid and neopentyl glycol, butanediol, ethylene glycol, etc. What was made to be suitable is suitable.
In addition, natural products such as animal natural materials such as gelatin, plant natural materials such as cellulose: starch fatty acid ester, starch chitonan and cellulose, etc., as microbial production systems, polyhydroxybutyrate and polyester systems: as carbon source P (3HB-CO-4HB) based on 3-hydroxypropionic acid, 4-hydroxybutyric acid, γ-butyrolactone, propionic acid as carbon source, P (3HB-CO-3HV) based on valeric acid, etc. Is preferred.

(Activation process)
The activation treatment for one surface of the transparent substrate 1 includes carbon dioxide laser irradiation, far infrared carbon dioxide laser irradiation, 172 nm vacuum ultraviolet (VUV, excimer light) irradiation, oxygen sensitized excimer light irradiation, plasma treatment, and open plasma. The chemical bond on the outermost surface of the transparent substrate is cut by photon energy (7.2 eV), discharge energy, electron beam energy, etc. larger than the chemical bond energy on the outermost surface of the transparent substrate such as treatment, corona treatment, and electron beam irradiation treatment. Or physical treatment such as generation of functional groups by contact with ozone or directly excited oxygen that is absorbed by oxygen in the atmosphere, such as vacuum ultraviolet light of 172 nm,
Oxidation treatment of transparent substrate surface by applying oxidizing agents such as permanganate and peroxide, primer coating treatment, vinyl, epoxy, methacryloxy, amino, mercapto, acryloxy, isocyanate, or styryl, alkoxy oligomer type silane Chemical treatment such as treatment using a coupling agent, argon beam etching treatment that is vacuum treatment, etching solution treatment that partially dissolves the transparent substrate, and sandblasting that mechanically scrapes the transparent substrate surface, etc. The activation processing region 2 is formed using physical processing or the like.
By the surface activation treatment of the transparent substrate 1, a high peel strength can be obtained even for a resin having low adhesion to the transparent substrate 1, that is, a resin having a low peel strength.

Using the above activation treatment, the interfacial tension or surface energy of the transparent substrate 1 is increased. Since the peel strength is determined by the resin used for the hologram forming layer 3 and the method of forming the resin, the interfacial tension value cannot be uniquely specified, but 60 to 80 mN / m is suitable as a guide. (In polyethylene terephthalate resin, 36 mN / m increases to 60 mN / m, and the peel strength from the melamine resin as the hologram forming layer increases from 0.4 kg / 25 mm width to 2.1 kg / 25 mm width.)
Therefore, one surface of the transparent substrate 1 is activated to improve the adhesiveness with the hologram forming layer 3 formed thereon, and the strength (0.5 kg / 25 mm width to 3.0 kg / 25 mm width) ( Any desired display pattern (characters, figures, symbols, etc.) that can visually recognize the activation treatment surface can be used, in accordance with the 180 ° peel test specified in JIS Z0237. , In order to show evidence that the label has been peeled off, the character portion “open” is activated in order to display characters such as “open”.) This is the activation processing area 2. (See Figure 1)
Among the activation treatments, light treatment such as laser irradiation or physical treatment such as plasma treatment does not cause unevenness on the treatment surface of the transparent substrate 1 and maintains a mirror surface, on the activation treatment surface. This is particularly desirable because it has a large deactivation effect due to the deactivation treatment and excellent optical transparency.
Further, instead of uniformly activating the above “pattern”, the “pattern” has a smaller “fine pattern”, for example, a halftone dot shape, a checkered pattern, a random pattern, etc. The transparent substrate 1 is peeled off by activating only the fine regions (for example, the portions other than the halftone dots in the “pattern” remain as untreated surfaces by activating the halftone dot shape). It is possible to increase the “trigger” for breaking and improve its breakability.
Preferably, it has a uniform halftone dot with a size of 30 μm to 300 μm (halftone dot ratio is preferably 30% to 70%. Activation is performed only within the halftone dot) and has a mesh of that size. Checkered pattern (square, rectangular, other shapes; one activation process is skipped), and to avoid the occurrence of unnecessary diffraction due to regular processing, halftone dots and checkered patterns The size is changed randomly between 30 μm and 300 μm. Of course, the change may not be disordered at all, but may be a discontinuous change according to a predetermined law.

(Inactivation process)
A portion other than the activation treatment region 2 on one side of the transparent substrate 1 is selectively inactivated, or a portion other than the “pattern” is applied after the entire surface of one side of the transparent substrate 1 is activated. In order to perform a treatment such as inactivation treatment (meaning surface treatment; hereinafter used in the same meaning),
Solvents such as ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, which dissolves only the outermost surface of the transparent substrate 1 or reacts with activated functional groups to eliminate the activity of the functional groups. Cyclohexanone, diacetone alcohol, isophorone, diisobutyl ketone, etc.), alcohols (methanol, ethanol, isopropyl alcohol, n-propyl alcohol, isobutyl alcohol, n-butyl alcohol, etc., and further aqueous solutions thereof), aromatics ( Benzene, toluene, xylene, Solvesso No. 100, Solvesso No. 150, Cactus P-180, etc.), cyclic hydrocarbons (cyclohexane, etc.), esters (ethyl acetate, butyl acetate, isobutyl acetate, propylene glycol monomethyl ether acetate) The , Cellulose acetate, ethyl-3-ethoxypropionate, etc.), ethers (tetrahydrofuran, methyl cellosolve, ethyl cellosolve, butyl cellosolve, t-butyl cellosolve, etc.), etc. A pattern is formed by using an ink jet method while avoiding contact with the activated surface, reacting only with the activated outermost surface portion of the transparent substrate 1, and inactivating only that portion.
At this time, since the solvent does not volatilize instantaneously and needs to remain on the surface of the transparent substrate for a predetermined time, the boiling point is adjusted to 60 degrees or more and 200 degrees or less, preferably 100 degrees or more and 160 degrees.
This method is particularly suitable in the sense that it hardly affects the surface roughness (specularity) of the transparent substrate 1 and only changes its properties.

Alternatively, it is difficult to adhere to the transparent substrate 1 in the first place, and a resin having a low interfacial tension, such as a silicone resin, a paraffin resin, a fluorine resin, a resin containing these fluorinated hydrocarbon groups or organic silicon groups, or a non-volatile Oil (dry seed oil such as linseed oil, poppy oil, walnut oil, non-drying oil such as olive oil and peanut oil, semi-drying oil such as sesame oil and rapeseed oil), etc. by typographic printing, inkjet printing, etc. By performing partial formation in a region other than the “pattern” (not shown), inactivation processing can be performed with high accuracy.
At this time, it is desirable not to give an optical change on the transparent substrate 1 after the partial formation, the solvent etc. is volatilized, and the resin etc. is only for the purpose of surface modification and the formation thickness after drying Is preferably about 1/5 to 1/50 of the wavelength of light. Of course, it is also suitable to use these in combination.
Of course, the same applies to the case where the “pattern” is composed of a set of “fine patterns”.
By this deactivation treatment, the deactivation treatment surface can set the peel strength between the transparent substrate 1 and the hologram forming layer 3 to 0.01 kg / 25 mm width or more and 0.1 kg / 25 mm width or less, If the hologram label A is to be peeled off, no matter how it is devised, there will always be a “gap” between the transparent substrate 1 and the hologram forming layer 3 and only the transparent substrate will begin to peel off.
And the part which peeled the transparent base material 1, ie, the outermost surface of the hologram formation layer 3 which hits an inactivation process surface becomes a mirror surface substantially, and the hologram reproduction image under it is visually recognizable clearly from the part. be able to.

(Hologram forming layer)
As the transparent resin material for constituting the hologram forming layer 3 of the present invention, various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins can be used. Thermoplastic resins include acrylic ester resins, acrylamide resins, nitrocellulose resins, or polystyrene resins. Thermosetting resins include unsaturated polyester resins, acrylic urethane resins, epoxy-modified acrylic resins, and epoxy-modified unsaturated resins. A polyester resin, an alkyd resin, a phenol resin, etc. are mentioned. (See Figure 1)
These thermoplastic resins and thermosetting resins can be used alone or in combination of two or more. One or more of these resins may be cross-linked using various isocyanate resins, or various curing catalysts, for example, metal soap such as cobalt naphthenate or zinc naphthenate may be blended. Or peroxide such as benzoyl peroxide or methyl ethyl ketone peroxide for initiating polymerization with heat or ultraviolet light, benzophenone, acetophenone, anthraquinone, naphthoquinone, azobisisobutyronitrile, or diphenyl sulfide. Also good.
Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, acrylic-modified polyester, etc., for the purpose of introducing a crosslinked structure into such an ionizing radiation curable resin or adjusting the viscosity, A monofunctional monomer, a polyfunctional monomer, or an oligomer may be blended and used.

In order to form the hologram forming layer 3 using the above resin material, it can be directly formed by developing the photosensitive resin material by performing interference exposure of the hologram. It is preferable to perform molding by using a replica or a plating mold thereof as a replica mold and pressing the mold surface against the layer of the resin material.
When thermosetting resin or ionizing radiation curable resin is used, curing is performed by heating or ionizing radiation irradiation while keeping the uncured resin in close contact with the mold surface, and then cured by peeling after curing. The fine irregularities of the relief hologram can be formed on one side of the layer made of a transparent resin material. A diffraction grating forming layer having a diffraction grating formed in a pattern by a similar method can also be used as the optical diffraction structure.
A relief hologram is a recording of interference fringes due to interference of light between object light and reference light in an uneven relief shape. For example, a laser reproduction hologram such as a Fresnel hologram, a white light reproduction hologram such as a rainbow hologram, There are color holograms utilizing these principles, computer generated holograms (CGH), holographic diffraction gratings, and the like. Further, like a machine readable hologram, the reproduction light may be converted into data by a light receiving unit and transmitted as predetermined information, or authenticity may be determined.

In order to precisely create fine irregularities, not only optical methods, but also electron beam lithography equipment can be used to create precisely designed relief structures that produce more precise and complex reproduction light. Good. The relief shape is designed to have a pitch, depth, or specific periodic shape of the unevenness according to the wavelength (range) of the light or light source for reproducing or reproducing the hologram, the direction and the intensity of reproduction or reproduction. The pitch (period) of the unevenness depends on the reproduction or reproduction angle, but is usually 0.1 μm to several μm, and the depth of the unevenness is a factor that greatly affects the reproduction or reproduction intensity, but is usually 0.1 μm. ˜1 μm.
As in the case of a single diffraction grating, when the unevenness of exactly the same shape is repeated, as the adjacent unevenness is the same shape, the degree of interference of reflected light increases and the intensity increases, and the maximum value is reached. Converge. Diffraction in the diffraction direction is also minimized. When a single point of an image converges to a focal point, such as a stereoscopic image, the convergence accuracy to the focal point is improved, and a reproduced or reproduced image becomes clear.
Furthermore, when the reflective thin film layer 4 is a transparent reflective thin film made of a transparent metal compound or the like, the upper and lower surfaces of the thin film have the same relief shape, and the distance between the surfaces (that is, the film thickness). The more uniform the is, the greater the reproduction or reproduction intensity. In addition, if there are irregularities having a period and shape different from the irregularities of the hologram image on the relief surface, this becomes noise during reproduction or reproduction of the hologram or diffraction grating, which causes the image to become unclear.
The relief shape is shaped (also referred to as replication) by using an original plate on which diffraction gratings and interference fringes are recorded in a concavo-convex shape as a press die (referred to as a stamper) on the hologram forming layer 3 or described below. The concavo-convex pattern of the original plate can be duplicated by superimposing the original plate on the reflective thin film layer 4 and heat-pressing both of them with an appropriate means such as a heating roll. The hologram pattern to be formed may be single or plural.
In order to accurately reproduce the above-mentioned extremely fine shape and to minimize distortion and deformation such as heat shrinkage after replication, the original plate is made of metal and replicated at low temperature and high pressure.
The original plate uses a metal having high hardness such as Ni. After a Cr or Ni thin film is formed on the surface of a glass master or the like formed by optical photography or electron beam drawing by vacuum deposition or sputtering, Ni or the like is electrodeposited (electroplating, electroless plating, Furthermore, after forming 50-1000 micrometers by composite plating etc., it can make by peeling a metal.

In order to use it for high-pressure rotation type replication, it is necessary to increase the thickness accuracy of this Ni layer, and it is usually ± 10 μm, preferably ± 1 μm. For this reason, you may use the back surface grinding | polishing or the planarization method.
Since the replication method is a high pressure, a rotary method is used instead of a flat plate method, and the linear pressure is 0.1 ton / m to 10 ton / m, preferably 5 ton / m or more. If the diameter of the duplication cylinder is small, the reproducibility of the relief is lowered. Therefore, it is preferable that the duplication cylinder diameter is large. Usually, an arc having a diameter of 0.1 m to 2.0 m, preferably 1.0 m or more is used. To do.
The hologram forming layer 3 on the transparent substrate 1 is pressed along this duplication cylinder, and duplication is carried out from the back side with a metal cylinder at the above pressure. In order to minimize distortion and deformation such as heat shrinkage after replication, a method of heating only a part of the hologram forming layer 3 side rather than heating the entire transparent substrate 1 is desirable. Usually it is heated to 60 ° C to 110 ° C. Furthermore, the precision can be further improved by keeping the metal cylinder on the back surface at room temperature or cooling it.

(Reflective thin film layer)
In the hologram label A of the present invention, the reflective thin film layer 4 is formed so as to contact and follow the hologram relief formed on the hologram forming layer 3. The reflective thin film layer 4 is not particularly limited as long as it is a thin film having a higher refractive index than that of the transparent substrate 1 because it is necessary to reflect incident light. (See Figure 1)
The reflective thin film layer 4 may be either a metallic gloss reflective layer such as a metal thin film formed by a vacuum thin film method or the like, or a transparent reflective layer. When provided, the image on the adherend covered with the label after label sticking can be observed through the hologram, which is preferable.
As the transparent reflective layer, it is a substantially colorless and transparent hue, and its optical refractive index is different from that of the hologram forming layer 3, so that it is possible to visually recognize the glitter such as a hologram even though there is no metallic luster, A transparent hologram can be produced.
For example, examples of the thin film having a higher refractive index than the hologram forming layer 3 include ZnS, TiO ₂ , Al ₂ O ₃ , Sb ₂ S ₃ , SiO, SnO ₂ , and ITO.

Preferably, it is a metal oxide or nitride, specifically, Be, Mg, Ca, Cr, Mn, Cu, Ag, Al, Sn, In, Te, Ti, Fe, Co, Zn, Ge, Pb. , Cd, Bi, Se, Ga, Rb, Sb, Pb, Ni, Sr, Ba, La, Ce, Au, etc. Oxides or nitrides, etc., or a mixture of two or more thereof (transparent metal compound) Can be illustrated.
In addition, a metal thin film having a general light reflectivity (reflection over almost the entire visible light wavelength, that is, a property close to “total reflection”) such as aluminum has transparency when the thickness is 20 nm or less. Can be used.
The transparent reflective layer (transparent metal compound layer) is formed by vapor deposition, sputtering, ion plating, CVD (chemical vapor deposition) so as to have a thickness of about 10 to 2000 nm, preferably 20 to 1000 nm, like a metal thin film. It may be provided by a vacuum thin film method or the like. In particular, the CVD method causes little thermal damage to the hologram forming layer 3. Even if other thin film forming methods are used, if the thin film layer to be formed is made thin, the thermal damage can be reduced. For example, in the case of an aluminum vapor deposition layer, depending on the formation conditions, a thickness of approximately 20 nm is a critical point where transparency is lost and total reflectivity appears. This thickness varies depending on the forming conditions such as the thin film material, the forming method, the metal heating temperature and the degree of vacuum.

(Adhesive layer)
The “parts made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 5 and “parts made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 6 constituting the pressure-sensitive adhesive layer 7 include conventionally known solvent systems and Any water-based adhesive such as vinyl acetate resin, acrylic resin, vinyl acetate-acrylic copolymer, vinyl acetate-vinyl chloride copolymer, ethylene-vinyl acetate copolymer, polyurethane resin, natural rubber, chloroprene rubber And rubber-based resins. Natural latex such as natural rubber latex, natural rubber latex obtained by graft polymerization of natural rubber with styrene, especially methacrylic acid methyl, in particular, to make natural material composition You may use what was produced from the raw material. Furthermore, a tackifier for increasing the adhesive strength or a curing agent can be used as appropriate.
Among these materials, materials having an adhesive strength ratio of 5/1 to 10/1 can be selected and used. (See Figure 1)
Furthermore, after mixing ionizing radiation curing type resins such as ultraviolet rays and electron beams into the adhesive and applying it uniformly, the ionizing radiation is applied only to the "adhesive area with high adhesive strength" masking method, etc. , And increase the adhesive strength of the adhesive in that area, "parts made of adhesive with low adhesive strength in the adhesive layer" 5 and "parts made of adhesive with high adhesive strength in the adhesive layer" It is also preferable that the area 6 is made to appear to be the adhesive layer 7 because it can be formed without being affected by the workability and the size and complexity of the area.
Further, in order to further increase the adhesive strength of the “part of the pressure-sensitive adhesive layer made of a pressure-sensitive adhesive having a high adhesive strength” 6, the “pressure-sensitive adhesive used in the“ part of the pressure-sensitive adhesive layer made of a pressure-sensitive adhesive having a high adhesive strength ”6 It is also suitable to add a fine particle additive.
As the fine particle additive, 10% of the resin compound fine particles such as silicone resin fine particles and fluororesin fine particles having an average particle diameter of 0.1 μm to 2 μm, and inorganic compound fine particles such as alumina fine particles with respect to the adhesive. By adding ~ 30%, the adhesive strength between the reflective thin film layer 4 and the adherend (not shown) in this region can be further increased.
In order to form the pressure-sensitive adhesive layer 7, first, a low-adhesive pressure-sensitive adhesive is formed in a checkered pattern on the reflective thin film layer 4 using a silk screen printing method or the like. The part made of adhesive with low adhesive strength "5" is provided, and then the surface in contact with the adhesive is fluorinated using a stainless screen printing method. A method can be used in which a large pressure-sensitive adhesive is formed, and a “part made of a pressure-sensitive adhesive having high adhesive strength in the pressure-sensitive adhesive layer” 6 is provided to form a pressure-sensitive adhesive layer 7 consisting of both parts.
Further, on the reflective thin film layer 4, “adhesive with low adhesive strength” is formed in a checkered pattern using a silk screen printing method or the like, and from “adhesive with low adhesive strength in the adhesive layer” After that, the “adhesive with high adhesive strength” adjusted to a low viscosity is filled between the areas where the “adhesive with low adhesive strength” is formed using a curtain coat method or a nozzle method. Thus, it is possible to use a method of forming and forming a “part made of a pressure-sensitive adhesive having a high adhesive strength in the pressure-sensitive adhesive layer” 6 and forming a pressure-sensitive adhesive layer 7 made of both parts.

Furthermore, on the reflective thin film layer 4, by using a silk screen printing method or the like, "adhesive with low adhesive strength" is formed in a checkered pattern so that the adhesive with low adhesive strength in the adhesive layer is formed. Separately from this, “parts made of agent” 5 are provided, and on the release paper (not shown), “adhesive with low adhesive strength” is formed in a checkered pattern, and “in the adhesive layer” By providing “parts made of adhesive with high adhesive strength” 6, and further, aligning these adhesive surfaces so that they face each other, laminating them, laminating, and peeling off the release paper, Layer 7 can be formed on reflective thin film layer 4. (See Figure 1)
As a solvent used for the “part made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 5 and the “part made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 6 constituting the pressure-sensitive adhesive layer 7,
Solvents such as ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, diacetone alcohol, isophorone, diisobutyl ketone, etc.), alcohols (methanol, ethanol, isopropyl alcohol, n-propyl alcohol, isobutyl alcohol, n -Butyl alcohol, etc., and its aqueous solution.), Aromatics (benzene, toluene, xylene, Solvesso No. 100, Solvesso No. 150, Cactus P-180, etc.), cyclic hydrocarbons (cyclohexane, etc.), esters (Ethyl acetate, butyl acetate, isobutyl acetate, propylene glycol monomethyl ether acetate, cellosolve acetate, ethyl-3-ethoxypropionate, etc.), ethers (tetrahydrofuran, methyl Cellosolve, ethyl cellosolve, butyl cellosolve, t-butyl cellosolve.) And the like can be used.
The formation thickness of the adhesion layer 7 shall be 5.0 micrometers-30.0 micrometers.
Further, the adhesive strength of the pressure-sensitive adhesives of the “parts made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 5 and the “parts made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 6 constituting the pressure-sensitive adhesive layer 7 ( The difference in the 180 ° peel test specified in JIS Z0237 is expressed as a ratio of the adhesive strength and is 5/1 to 10/1.
That is, the adhesive strength of the adhesive having the higher adhesive strength is 1.0 to 2.0 kg / 25 mm width in the peeling method at 180 ° in accordance with JIS Z0237, and the adhesive strength of the adhesive having the lower adhesive strength is In the peeling method at 180 ° in accordance with JIS Z0237, the width is 0.1 to 0.4 kg / 25 mm.
The types and thicknesses of the pressure-sensitive adhesives as described above are “parts made of a pressure-sensitive adhesive with low adhesive strength in the pressure-sensitive adhesive layer” 5 and “on the transparent base material 1, the hologram forming layer 3 and the reflective thin film layer 4”. When forming the pressure-sensitive adhesive layer 7 composed of the “part made of a pressure-sensitive adhesive with high adhesive strength” 6 in the pressure-sensitive adhesive layer, it is selected and used so that its peel strength is within the range.

EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this. In addition, except a solvent, each composition of each layer is a mass part of solid content conversion.
(Example 1) A 38 μm polyethylene terephthalate resin film was used as the transparent substrate 1, and one side of the film was “open” and “sealed” characters of 20 mm × 20 mm size (the width of the image line was 2 mm.) Was activated by irradiating excimer light having a wavelength of 172 nm while scanning using an excimer UV03 reformer manufactured by Excimer. This processing region becomes a pattern-shaped activation processing region 2. (See Figure 1)
A hologram forming layer 3 made of melamine resin is formed thereon (peeling strength between the transparent substrate 1 and the hologram forming layer 3: equivalent to an activation surface of 1.2 kg / 25 mm width), and then a laser optical system. A Ni original plate having a highly designed hologram photographed using the above-mentioned is prepared, and the relief surface of the Ni original plate is aligned with the above-described hologram forming layer 3 to form a rotary relief hologram forming apparatus (original cylinder diameter 1.0 m). A hologram relief was formed on the hologram forming layer 3 at an original surface temperature of 100 ° C., a pressurized cylinder diameter of 0.3 m, water-cooled, a pressure of 2 ton / m, and a replication speed of 10 m / min.
Next, a reflective thin film layer 4 made of an aluminum thin film having a thickness of 200 nm was formed so as to be in contact with and follow the hologram relief surface by a vacuum vapor deposition machine manufactured by ULVAC. (See Figure 1)

On this reflective thin film layer 4, the following “parts made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 5, using a pressure-sensitive adhesive composition 5, a stainless screen printing method, a diameter of 200 μm, a dot ratio A 50% halftone dot-shaped “part made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 5 was formed so that the thickness after drying was 20 μm. Thereafter, from the “adhesive with high adhesive strength in the adhesive layer” described below so as to fill a region where the “part made of the adhesive with low adhesive strength in the adhesive layer” 5 on the reflective thin film layer 4 is not provided. Using the pressure sensitive adhesive composition for "Part 6", stainless screen printing method (using negative / positive reversal plate of the screen plate used in the above printing, connecting halftone dots with thin lines and fluorination treatment on the bottom surface Is formed so that the thickness after drying of the adhesive layer having a high adhesive strength in the adhesive layer is 20 μm, and the adhesive layer 7 is provided. The hologram label A of Example 1 was obtained by cutting into a size of 40 mm × 60 mm. (See Figure 1)
・ <"Adhesive composition for" part consisting of adhesive with low adhesive strength in adhesive layer "5 >>
(Adhesive strength after drying 0.2kg / 25mm width)
Vinyl acetate-acrylic copolymer 30 parts by mass Toluene 20 parts by mass Isopropyl alcohol 20 parts by mass Vinyl acetate 20 parts by mass Ethyl cellosolve 10 parts by mass << Part consisting of an adhesive with high adhesive strength in the adhesive layer> 6 Adhesive composition>
(Adhesive strength after drying 1.8kg / 25mm width)
Vinyl chloride-vinyl acetate-acrylic copolymer 30 parts by weight Isophorone diisocyanate 0.1 part by weight Toluene 30 parts by weight Vinyl acetate 35 parts by weight Average particle size 0.3 μm Ultrafine silica 5 parts by weight When sealed with a 2 kg weight rubber roller for sealing the sealed envelope, left for 24 hours and visually observed, there is no optical difference between the activation treatment area 2 and other areas. It could not be recognized, and it could not be confirmed that there was a “pattern” character.
When the hologram label A was peeled off, only the transparent substrate 1 started to peel easily, and only the portion corresponding to the characters “open” and “sealed” of the transparent substrate 1 (activation processing region 2) was broken. The hologram forming layer 3, the reflective thin film layer 4, and the adhesive layer 7 were partly adhered and peeled off.
Then, the remaining portion of the hologram label A without the transparent base material 1 in which the portions corresponding to the letters “open” and “sealed” are “open” remains in the sealed portion of the envelope, and “open” And a clear hologram reproduction image in which the portion corresponding to the characters “sealing” was cut off was visible.
From this, it was considered that the hologram label A has a high designability and a high anti-opening effect.

(Example 2) A 38 μm polyethylene terephthalate resin film was used as the transparent substrate 1, and one surface of the transparent substrate 1 was used with an excimer UV03 reformer manufactured by Excimer, wavelength 172 nm.
The excimer light was irradiated and activated.
On the activation treatment surface, using the following deactivation treatment solvent composition, the letter “open” and “sealing” characters of the vertical and horizontal sizes of 20 mm × 20 mm (the width of the image line is 2 mm.) Was formed with a coating thickness of 5 μm before drying so that the characters that repeat vertically and horizontally become “white” (only the line portions of the characters “open” and “sealed” are active) The remaining area becomes the inactivation area, and the other area becomes the inactivation area.)
This is dried at a drying temperature of 80 ° C., and a pattern-like activation processing region 2 (see FIG. 1) that repeats the characters “open” and “sealing” vertically and horizontally, and a surrounding inactivation processing region (not shown). Z.) was formed.
<Solvent composition for deactivation treatment>
Methyl ethyl ketone (boiling point 80 degrees) 15 parts Toluene (boiling point 100 degrees) 25 parts Methyl isobutyl ketone (boiling point 115 degrees) 30 parts Cyclohexanone (boiling point 156 degrees) 30 parts On top of that, a hologram forming layer 3 made of melamine resin was formed Except for (peeling strength between the transparent substrate 1 and the hologram forming layer 3: equivalent to an inactivation treatment portion of 80 g / 25 mm width and an activation treatment surface of 1.2 kg / 25 mm width). The hologram label A of Example 2 was obtained. (See Figure 1)
When evaluated in the same manner as in Example 1, when the transparent substrate 1 was peeled off, the initial peeling of the transparent substrate 1 was very smooth, and the hologram forming layer 3 was more easily broken. Good results similar to those of Example 1 were obtained except for the above.

(Example 3) All the same as Example 1 except that the TiOx thin film layer 40nm is formed and the design is printed on the envelope to be sealed by using an electron beam heating method vacuum deposition machine manufactured by ULVAC. A hologram label A (transparent hologram label A) of Example 3 was obtained. (See Figure 1)
When evaluated in the same manner as in Example 1, there is no optical difference between the “patterned” character portion in the transparent hologram label A and the other portions, and the envelope design is passed through the transparent hologram label A. And a dot-like pattern (“part made of a pressure-sensitive adhesive in the pressure-sensitive adhesive layer” 6 is slightly cloudy under the reflective thin film layer 4 having transparency. The part of the adhesive layer 5 that is visible and has a low adhesive strength in the adhesive layer “5” looks like a halftone dot pattern.) Is a uniform pattern and is observed as a simple “background pattern”. In addition to the fact that it was not possible to read that there was something that promoted the breakage of the hologram forming layer 3, the same good effects as in Example 1 were obtained.
(Example 4) A 38 μm polyethylene terephthalate resin film was used as the transparent substrate 1, and one surface thereof was activated by a corona treatment system using a polydyne low-frequency corona treatment system manufactured by Navitas. A hologram label A of Example 4 was obtained in the same manner as Example 2 except that the activation treatment solvent composition was formed by an inkjet method with a thickness of 1 μm. (See Figure 1)
<Solvent composition for deactivation treatment>
Methyl ethyl ketone (boiling point 80 degrees) 40 parts Toluene (boiling point 100 degrees) 30 parts Methyl isobutyl ketone (boiling point 115 degrees) 29 parts Linseed oil 1 part When evaluated in the same manner as in Example 2, the transparent substrate 1 peels off very easily. Except that, the same effect as in Example 2 was obtained.

Example 5 A hologram label A of Example 5 was obtained in the same manner as in Example 1 except that a biodegradable plastic Tosero pal seal thickness of 40 μm was used as the transparent substrate 1. (See Figure 1)
When evaluated in the same manner as in Example 1, it was estimated that the same effect as in Example 1 was obtained and that it would be environmentally friendly when discarded.
(Example 6) The “pattern” of the pattern-like activation processing region 2 is a “fine pattern” of a 50 μm × 100 μm rectangle, and this basic shape is a checkered pattern (“rectangular fine solid portion” Next, the pattern becomes the “rectangular fine blank”.) The “pattern” in the pattern-like activation processing area 2 is inactivated by skipping one (only the rectangular blank is processed). In addition, the above-described “opening” is made up of a set of “fine patterns” by uniformly inactivating areas other than “patterns” (areas other than “open” and “sealed” image lines). ”And“ sealed ”“ patterned activation treatment region 2 ”(only the“ rectangular fine solid portion ”is activated). The hologram label A of Example 6 was obtained. (See Figure 1)
When evaluated in the same manner as in Example 2, the characters “open” and “sealed” displayed at the time of peeling were more difficult to find before peeling, and the hologram forming layer 3 was more likely to break. The same good results as in Example 2 were obtained.
(Embodiment 7) The “pattern” of the pattern-like activation processing region 2 is a “fine pattern”, that is, a halftone dot shape having a diameter of 200 μm and a halftone dot ratio of 50%, and the region corresponding to the “pattern” About five groups of “parts made of adhesives with low adhesive strength in the adhesive layer”, “parts made of adhesives with low adhesive strength in the adhesive layer having a diameter of 200 μm with the same dot size and position” "5", and also in areas other than the "pattern", the same size "parts made of adhesive with low adhesive strength in the adhesive layer" 5 were formed at the same interval Obtained hologram label A of Example 7 in the same manner as Example 6. (See Figure 1)
When evaluated in the same manner as in Example 6, good results similar to those in Example 6 were obtained except that the hologram forming layer 3 was more easily broken.

(Comparative example)
Comparative Example 1 A hologram label of Comparative Example 1 was obtained in the same manner as in Example 1 except that the activation treatment was not performed and the adhesive layer was a uniform layer having a thickness of 30 μm.
When this hologram label was evaluated in the same manner as in Example 1, the transparent substrate 1 was not easily peeled off, but was peeled off from the adhesive layer, and a slight amount was removed between the transparent substrate 1 and the hologram forming layer 3 during the peeling. “Gap” only occurred.
Therefore, if this hologram was carefully removed, it would have been possible to remove it illegally.

A hologram label 1 transparent substrate 2 activation treatment region in which one surface of the transparent substrate is partially activated 3 hologram forming layer 4 reflective thin film layer 5 adhesive having low adhesive strength in the adhesive layer Part 6 Consisting of adhesive layer with low adhesive strength 7 Adhesive layer (“Part of adhesive layer with low adhesive strength” and “Adhesive layer with high adhesive strength” Part ”)

Claims (4)

A hologram forming layer having a hologram relief provided so as to cover the activation processing region on a transparent substrate having a pattern-shaped activation processing region, so as to follow the hologram relief of the hologram forming layer A hologram label, wherein the reflective thin film layer and the adhesive layer are provided in this order, and the adhesive layer is formed by alternately forming two types of adhesives having different adhesive strengths.
2. The hologram label according to claim 1, wherein an area other than the pattern activation process area on the transparent substrate is an inactivation process area.
3. The hologram label according to claim 1, wherein the pattern is constituted by a set of fine patterns.
  The fine pattern has a halftone dot shape, the size and arrangement of the halftone dot shape of the fine pattern, and the two types of pressure-sensitive adhesives at positions corresponding to the pattern of the pressure-sensitive adhesive layer. 4. The hologram label according to claim 3, wherein the size and arrangement of the forming region of the adhesive having the smaller adhesive strength among the forming regions are the same.

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