JP2012145717A - Adhesive label and device for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive label capable of ensuring high sensitivity at the time of development of adhesiveness, adhesive force, and stability.SOLUTION: An adhesive label 10 includes an adhesive layer 12 which is made of a pressure-sensitive adhesive and which is formed on one face of a support medium 11, and a thermal-reactive film 13 covering the adhesive layer 12. The thermal-reactive film 13 is nonadhesive, and is made of material which has a melting point equal to or higher than storage temperature and a boiling point equal to or lower than heating temperature. Adhesiveness is developed through openings of the thermal-reactive film which are formed by applying heat.

Description

  The present invention relates to an adhesive label and an apparatus for producing the same.

  Conventional general pressure-sensitive adhesive labels have a printing surface on one surface and an adhesive surface on the other surface, and these are wound in a roll shape or in a sheet shape.

  These pressure-sensitive adhesive labels are usually stored or stored in an overlapping manner. For this reason, it is known that the adhesive surface is covered with release paper so that the adhesive labels do not stick to each other. Such an adhesive label is used by being peeled off from the release paper at the time of use, and the release paper after use is treated as waste. Moreover, when producing an adhesive label with printing apparatuses, such as a printer, the operation | work for peeling off a label from a release paper after preparation was an effort. As described above, the conventional pressure-sensitive adhesive labels have various problems in terms of environmental protection, labor, and cost.

  In view of these problems, in recent years, a pressure-sensitive adhesive label that requires no release paper by forming the pressure-sensitive adhesive surface of the pressure-sensitive adhesive label with a heat-sensitive adhesive has been proposed (Patent Document 1). That is, the heat-sensitive adhesive used on the adhesive surface is usually non-adhesive and develops an adhesive property when heated to a certain temperature or higher. It becomes unnecessary.

  This pressure-sensitive adhesive label uses a heat-sensitive pressure-sensitive adhesive on the pressure-sensitive adhesive surface, so that it has high adhesiveness after heating and blocking resistance that does not cause blocking even when stored for a long time in an unheated state. Further, this pressure-sensitive adhesive label can be activated with low thermal energy, and has excellent anti-blocking properties and adhesion to non-rough surface adherends and rough surface adherends.

  In addition, an adhesive label has been proposed in which a recording surface is formed on one surface of a substrate and an adhesive surface made of a pressure-sensitive adhesive is formed on the other surface, and the adhesive surface is covered with a non-adhesive resin film (Patent Document 2). ). This prevents blocking during storage and storage, and when adhesive strength is required, the resin film is selectively heated to open an opening, and the lower adhesive layer is exposed from the opening to adhere. It describes about the structure of the adhesive label stuck on.

JP 2006-083196 A JP 2006-78733 A

  However, the solid plasticizer contained in the heat-sensitive adhesive has a glass transition point (Tg) of room temperature or lower, and therefore it is inevitable that a certain level of adhesive force is exhibited even at room temperature storage. In order to solve these problems, it is conceivable that the glass transition point at which the solid plasticizer is activated is made higher than room temperature, thereby suppressing the adhesiveness at room temperature and preventing blocking. A large amount of heat energy is required for sexual expression.

On the other hand, in order to obtain a strong adhesive force with the above-described configuration, that is, an adhesive force corresponding to various adherends, it is conceivable to form a thick heat-sensitive adhesive layer. This causes problems such as the need to increase the power source capacity of the heat source.
In the end, it is difficult to achieve both the prevention of the blocking phenomenon at room temperature and the securing of high adhesiveness with relatively low thermal energy.

  Furthermore, since the solid plasticizer contained in the heat-sensitive adhesive has crystallinity depending on temperature, it causes a sharp decrease in the adhesiveness due to recrystallization after thermal activation.

  In addition, when heat-sensitive adhesive is heated and melted using a thermal head such as a thermal printer as a heat source, the thermal head and the heat-sensitive adhesive are in direct contact with each other, leading to defective conveyance of adhesive labels and the occurrence of paper jams. Had.

  Moreover, in the adhesive label covered with the resin film, the resin film arrange | positioned on the surface of a pressure sensitive adhesive layer is heated with heat sources, such as a thermal head. At that time, a heat distribution is generated with the heating point by a heat source such as a thermal head as a heat peak, and the resin film starts to melt from the heating point to form a hole (opening). The heat from the heat source gradually spreads from the heating point to the surroundings. The size of this hole is determined by the inherent thermal conductivity of the resin and the amount of heat applied. Therefore, in order to form a larger hole in the same resin film, there is a problem that higher heat is required. Moreover, since the adhesive force of the pressure-sensitive adhesive layer that is originally applied to the adherend also acts on the resin film, it becomes a factor that inhibits thermal deformation and thermal shrinkage of the resin film during heating. If it does so, an opening part with sufficient size and a high precision cannot be formed, but the adhesive force of the pressure-sensitive adhesive layer exposed through an opening part may not fully be exhibited.

  The conventional pressure-sensitive adhesive label described above does not require a release paper, but has a common technical problem that heat energy is increased in order to develop pressure-sensitive adhesive properties by heating at room temperature.

In consideration of the reaction of the material by heating, first, the basic precondition is to induce the reaction by increasing the temperature of the material to be heated. From the viewpoint of heat capacity, it is known that the temperature rise of the material is mainly due to the specific heat and mass of the material to be heated, and it is advantageous that the specific heat of the material is small and the coating amount is small and the layer thickness is thin. It has been. However, since an adhesive label generally targets an unspecified adherend, the amount of adhesive applied to the adhesive label tends to increase.
The present invention aims to solve these problems.

  The pressure-sensitive adhesive label according to the present invention is a pressure-sensitive adhesive label having a pressure-sensitive adhesive surface formed on one surface of a support, and the pressure-sensitive adhesive surface includes the pressure-sensitive adhesive layer formed on one surface of the support, A non-adhesive thermal reaction film covering the adhesive layer and having an opening formed therein, wherein the thermal reaction film is formed of a material having a melting point of 50 degrees or more and a boiling point of 260 degrees or less. And

  According to the present invention, the entire adhesive surface of the adhesive label is covered with a non-adhesive thermal reaction film having a melting point of 50 degrees or more. Therefore, occurrence of so-called blocking during storage can be prevented.

  In addition, the non-adhesive thermal reaction film having a boiling point of 260 ° C. or less can be easily formed with an opening by heating a thermal head or the like having a heat source having a heating temperature higher than 260 ° C. In addition, since the thermal reaction film is vaporized, there is no influence of thermal deformation or thermal shrinkage like a resin film, so there is an adhesive label that can efficiently form an opening in the thermal reaction film and exhibit adhesiveness by the adhesive layer. Can be provided.

In addition, since waste such as release paper is eliminated, a pressure-sensitive adhesive label that is preferable from the viewpoint of environmental protection can be provided.
In addition, when the pressure-sensitive adhesive label is wound in a roll shape, the unit cost of the pressure-sensitive adhesive label can be reduced by the thickness of the unnecessary release paper.
At the same time, the use of the pressure-sensitive adhesive label according to the present invention eliminates the adhesion of glue dust to the pressure-sensitive adhesive label producing apparatus, paper jams caused by this, and poor pressure-sensitive label conveyance.
As a result, it is possible to obtain a pressure-sensitive adhesive label that can achieve high sensitivity by minimizing heating for the development of pressure-sensitive adhesive properties, and can further secure the pressure-sensitive adhesive properties and stability that are characteristics of the pressure-sensitive pressure-sensitive adhesive.

Further, the pressure-sensitive adhesive layer is made of a material that does not change its adhesive property at a temperature equal to or lower than a heating temperature at which the opening is formed in the thermal reaction film.
The heating temperature for forming the opening in the thermal reaction film is not less than the boiling point of the material of the thermal reaction film.
Further, it is possible to increase the sensitivity by reducing the thickness of the thermal reaction film, and the thickness is desirably 1 μm or less.
In addition, a heat-sensitive recording layer is formed on the other surface of the support.

  The pressure-sensitive adhesive label production apparatus according to the present invention produces a pressure-sensitive adhesive label having a pressure-sensitive adhesive layer formed on one surface of a support and a non-adhesive thermal reaction film covering the pressure-sensitive adhesive layer. A pressure-sensitive adhesive label producing apparatus, wherein the pressure-sensitive adhesive label is stored, a heating unit that forms an opening in the thermal reaction film by heating, and a suction unit that sucks the vaporized thermal reaction film by the heating unit. It is characterized by having.

  According to the present invention, it is possible to reduce the driving power of the thermal head or the like due to good thermal efficiency, and it is possible to reduce the size of the power source and the label manufacturing apparatus main body.

  Further, the heating means is a thermal head, and the thermal reaction film is selectively heated at an arbitrary position to form a plurality of the openings with a desired pattern.

  By using the thermal head of the pressure-sensitive adhesive label production apparatus as a heat source, it is possible to freely control the desired pressure-sensitive adhesive force on the pressure-sensitive adhesive area of the pressure-sensitive adhesive surface of the pressure-sensitive adhesive label, and by using a pressure sensitive adhesive, Regardless of the non-rough surface, it is possible to obtain an adhesive label that exhibits sufficient adhesive properties in accordance with the adherend.

  Further, it has a heat-sensitive recording layer on the other surface of the support, and has a recording means for recording desired print information on the heat-sensitive recording layer. Further, the recording means is a thermal head.

  According to the present invention, the entire adhesive surface of the adhesive label is covered with a non-adhesive thermal reaction film having a melting point of 50 degrees or more. Therefore, occurrence of so-called blocking during storage can be prevented.

It is the schematic which shows an example of the adhesive label production apparatus of this invention. It is sectional drawing which shows an example of the adhesive label of embodiment of this invention. It is sectional drawing which shows an example of the adhesive label of embodiment of this invention. It is sectional drawing which shows an example of the adhesive label of embodiment of this invention. It is a top view which shows the arrangement pattern of the opening part of the adhesive label of this invention. It is a top view which shows the arrangement pattern of the opening part of the adhesive label of this invention. It is the schematic which shows an example of the adhesive label production apparatus of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic diagram of an adhesive label production apparatus. 2 to 4 show sectional views of the pressure-sensitive adhesive label.

  The pressure-sensitive adhesive label production apparatus 100 includes a storage unit 1 that stores a pressure-sensitive adhesive label, a printing unit 2, a pressure-sensitive adhesive expression unit 3, and a cutting unit 4.

  The storage unit 1 holds an adhesive label 10 wound in a roll shape. Further, a recording means for recording desired print information on the thermosensitive recording layer 14 of the support 11 is provided.

  FIG. 2 is a view showing a cross section of the pressure-sensitive adhesive label 10 in the storage unit 1. The pressure-sensitive adhesive label 10 is a pressure-sensitive adhesive label having a pressure-sensitive adhesive surface formed on one surface of the support 11, and the pressure-sensitive adhesive surface covers the pressure-sensitive adhesive layer 12 and the pressure-sensitive adhesive layer on one surface of the support 11. A non-adhesive thermal reaction film 13 in which an opening is formed. A thermosensitive recording layer 14 is formed on the other surface of the support 11. Further, an overcoat 15 for protecting the heat-sensitive recording layer 14 is formed on the heat-sensitive recording layer 14.

  The pressure-sensitive adhesive layer 12 is a layer made of a pressure-sensitive pressure-sensitive adhesive that exhibits adhesiveness only by applying a slight pressure at room temperature in a short time without using water, a solvent, heat, or the like. It is formed on the surface.

  In addition, as a pressure sensitive adhesive, what has both cohesion force and elastic force and has high adhesiveness, but can be easily peeled is preferable.

  However, the pressure-sensitive adhesive layer 12 is not limited to a pressure-sensitive pressure-sensitive adhesive, and for example, a rubber-based pressure-sensitive adhesive such as natural rubber, styrene butadiene rubber (SBR), polyisobutylene rubber, or a monomer having a low glass transition point is high. It may be made of a non-crosslinked acrylic pressure-sensitive adhesive copolymerized with a monomer, a silicone pressure-sensitive adhesive composed of a high cohesive silicone and a high adhesive silicone resin, or the like.

  The pressure-sensitive adhesive label 10 is in a state where the pressure-sensitive adhesive layer 12 cannot be exhibited because the pressure-sensitive adhesive layer 12 is covered with the non-adhesive thermal reaction film 13. Therefore, even if a plurality of adhesive labels 1 are stacked and stored, or a long adhesive label 10 is wound and stored in a roll shape as shown in FIG. Can be prevented. Moreover, in this unheated state, since it is kept in a non-adhesive state, it does not adhere to various members in the adhesive label production apparatus, and the paper passing property is good. The pressure-sensitive adhesive label 10 fed out from the storage unit 1 is conveyed and sent to the printing unit 2 which is a recording means.

  FIG. 3 is a view showing a cross section of the pressure-sensitive adhesive label 10 on which the pattern recording layer 141 is formed. In the printing unit 2, the adhesive label 10 is conveyed while being sandwiched between the thermal head 21 and the platen roller 22, and a desired pattern, that is, a pattern of characters, symbols, designs, etc., is applied to the thermal recording layer 14 by the thermal head 21 at a desired position. Are recorded, and the pattern recording layer 141 is formed. Then, the adhesive label 10 is conveyed to the adhesion expression part 3.

  FIG. 4 is a view showing a cross section of the pressure-sensitive adhesive label 10 in which the opening (adhesive strength adjusting portion) 131 is formed. In the adhesion developing unit 3, the adhesive head 3 is sandwiched between the thermal head 31 and the platen roller 32 and heated at a desired position. Thereby, a desired opening 131 is selectively formed in the thermal reaction film 13 at a desired position by the thermal head 31. Specifically, the portion of the thermal reaction film 13 that is in contact with the thermal head 31 is heated to change phase, and the opening 131 is formed. At this time, the pressure-sensitive adhesive layer 12 positioned below the thermal reaction film 4 has a larger heat capacity than the thermal reaction film 4, so that the temperature does not increase and the adhesive property does not change, and therefore hardly deforms.

  At this time, as an example, a plurality of openings 131 arranged in a matrix at equal intervals can be formed as shown in FIG. In addition, the adhesive force of the lower-layer adhesive exposed through the opening 131 can be controlled. In general, the larger the total area of the openings 131, the greater the adhesive force, and the arrangement pattern of the openings 131 should be a checkered pattern or a staggered pattern as shown in FIG. 5 or a polygonal geometric pattern. Can do.

  Furthermore, as shown in FIG. 6, it is possible to form a large opening 131 so that the central part of the pressure-sensitive adhesive label is opened in a rectangular shape, that is, almost the entire surface of the pressure-sensitive adhesive label is opened, and the adhesive force can be controlled. Further, the heating means is not limited to the thermal head 31, and an appropriate one can be used.

  In order to obtain such an opening 131, the boiling point of the thermal reaction film 13 is set to be equal to or lower than the temperature heated by the thermal head 31. That is, since the heating temperature in the thermal head is larger than 260 degrees, the opening 131 is obtained by using the thermal reaction film 13 having a boiling point of 260 degrees or less. Furthermore, if the boiling point of the thermal reaction film is 250 degrees or less, the opening 131 can be obtained reliably.

  Further, in order to prevent the occurrence of blocking or the like during storage, the melting point is made higher than the storage temperature. That is, any substance having a melting point higher than the storage temperature and a boiling point lower than the heating temperature may be used. Furthermore, since the temperature at the time of storage does not become higher than 50 degrees, it is preferable that the substance has a melting point of 50 degrees or more. That is, the thermal reaction film 13 is formed of a material having a melting point of 50 degrees or more and a boiling point of 260 degrees or less. Examples of the substance include naphthalene having a melting point of 80 degrees and a boiling point of 218 degrees, paradichlorobenzene having a melting point of 54 degrees and a boiling point of 174 degrees, and bornan-2-one having a melting point of 180 degrees and a boiling point of 208 degrees. Since the thermal reaction film 13 made of such a material is vaporized by heating, no tearing or the like occurs when a resin film is used, so that the influence on the unheated part is small and a clean opening pattern can be obtained. . Further, it is possible to increase the sensitivity by reducing the thickness of the thermal reaction film 13, and the thickness is desirably 1 μm or less. That is, the opening 131 starts to be formed by heating above the melting point of the thermal reaction film 4, and the opening 131 is completely formed by heating above the boiling point of the thermal reaction film 4.

  Further, in order to prevent the vaporized gas from being cooled and aggregated and adhered in the apparatus, a suction part 33 may be installed in the adhesion developing part 3 as shown in FIG. Depending on the substance, there is an odor due to sublimation and vaporization, so that the user can be made uncomfortable by installing the suction part 33.

  Thereafter, the adhesive label 10 is conveyed to the cutting unit 4. The cutting part 4 is cut to a desired length by the cutter members 41 and 42. As described above, the pressure-sensitive adhesive label 10 can be produced. Then, the pressure-sensitive adhesive layer 12 exposed from the opening 131 adheres to the adherend by lightly pressing the adhesive label 1 having the opening 131 formed on the adherend, and deforms along the surface of the adherend. Can be pasted.

  In the present embodiment, the storage unit 1, the printing unit 2, the adhesion developing unit 3, and the cutting unit 4 are installed in this order, but the installation order can be changed. For example, the cutting unit 4 is placed immediately after the storage unit 1. Can be installed.

  Further, the layer formed on the other surface of the support 11 with respect to the pressure-sensitive adhesive layer 12 is not limited to the one that can be recorded by a thermal head method that performs printing by heat as in the present embodiment, but an ink jet method or electrophotography. It may be recordable by another printing method such as a method. Further, on the other surface of the support 11, not a printable print layer but display means such as an RFID tag such as an RFID or electronic paper can be provided.

DESCRIPTION OF SYMBOLS 1 Storage part 10 Adhesive label 11 Support body 12 Adhesive layer 13 Thermal reaction film 131 Opening part (adhesive force adjustment part)
14 thermal recording layer 141 pattern recording layer 15 overcoat 2 printing unit 21 thermal head (recording means)
22 Platen roller 23 Inkjet part (recording means)
3 Adhesive expression part 31 Thermal head (heating means)
32 Platen roller 33 Suction part (dust collection / gas adsorption means)
4 Cutting part 41, 42 Cutter member 100 Adhesive label production apparatus

Claims (9)

An adhesive label having an adhesive surface formed on one surface of a support,
The pressure-sensitive adhesive surface is a pressure-sensitive adhesive layer formed on one surface of the support,
A non-adhesive thermal reaction film covering the pressure-sensitive adhesive layer and having an opening formed therein;
The thermal reaction film is formed of a material having a melting point of 50 degrees or more and a boiling point of 260 degrees or less.   2. The pressure-sensitive adhesive label according to claim 1, wherein the pressure-sensitive adhesive layer is made of a material whose pressure-sensitive adhesive property does not change below a heating temperature at which the opening is formed in the thermal reaction film.   The pressure-sensitive adhesive label according to claim 1 or 2, wherein a heating temperature for forming the opening in the thermal reaction film is equal to or higher than a boiling point of a material of the thermal reaction film.   The pressure-sensitive adhesive label according to claim 1, wherein the thermal reaction film is formed with a thickness of 1 μm or less.   The pressure-sensitive adhesive label according to any one of claims 1 to 4, wherein a thermosensitive recording layer is formed on the other surface of the support. An adhesive label production apparatus for producing an adhesive label having an adhesive layer formed on one surface of a support and a non-adhesive thermal reaction film covering the adhesive layer,
A storage section for storing the adhesive label;
Heating means for heating at a temperature equal to or higher than a heating temperature at which an opening is formed in the thermal reaction film;
And a suction means for sucking the vaporized thermal reaction film by the heating means.   The pressure-sensitive adhesive label production according to claim 6, wherein the heating means is a thermal head, and the thermal reaction film is selectively heated at an arbitrary position to form a plurality of the openings in a desired pattern. apparatus. In the case where the adhesive label has a thermosensitive recording layer on the other surface of the support,
8. The pressure-sensitive adhesive label producing apparatus according to claim 6, further comprising recording means for recording desired print information on the thermosensitive recording layer.   The pressure-sensitive adhesive label producing apparatus according to claim 8, wherein the recording means is a thermal head.

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