KR100834886B1 - Fragrance discharging ink composition, printing method and printed material using the composition - Google Patents

Abstract

A fragrance-emitting ink composition is provided to enable gravure printing of microcapsule ink, and to realize safety and hygienic property when used for packaging foods or living goods. A fragrance-emitting ink composition comprises: 80-95 wt% of aqueous printing ink; and 5-20 wt% of fragrance-emitting microcapsule composition containing fragrance-emitting capsules and a solvent. The fragrance-emitting microcapsules have a particle diameter of greater than 0 and less than or equal to 3 micrometers, and the fragrance-emitting microcapsules having the above particle diameter is present in an amount of 50-100 wt% based on the total weight of the microcapsules.

Description

Fragrance discharging ink composition, printing method and printed material using the composition

1 to 3 are schematic diagrams showing the layer structure of a printed matter (packaging material) according to embodiments of the present invention.

* Description of Major Reference Marks *

10 substrate 20 oily or aqueous printing ink layer

30: fragrance ink layer

The present invention relates in particular to fragrance ink compositions useful for gravure printing, printing methods and prints using the same.

A fragrance ink is a mixture of a fragrance component and a general ink. As the fragrance component, a fragrance microcapsule having microencapsulated (solidified) wrapped with a fragrance in a polymer film is used. Microencapsulation is usually encapsulated by mixing the fragrance with water to make an emulsion and raising the temperature to the temperature at which phase separation occurs, and then adding a crosslinking agent to cause a crosslinking reaction of the polymer. The ink containing the microcapsules is pressurized after printing, and the fragrance emanates as the capsule is broken.

Such fragrance microcapsule inks are well known. For example, Japanese Patent Application Laid-Open No. 1996-039929 discloses a microcapsule-type fragrance ink composed of dyes, pigments, fragrances, additives, and adhesives in an oil-based ink to prepare a pressure-sensitive transfer method. Printing forming with a printing press is described.

However, in the conventional flavor microcapsule ink technology, an oil ink using an organic solvent such as toluene is used, but such an oil ink has a problem that it is not suitable to be applied to packaging materials requiring hygiene and stability such as food packaging paper.

In addition, the reason for using the above-mentioned oil ink is to consider the resistance of the microcapsules to the solvent, it was not easy to replace the oil ink.

In addition, the conventional odor microcapsule ink has a problem that it is difficult to apply to gravure printing itself because the microcapsule itself is destroyed due to the friction of the beta and the guide during the gravure printing process.

The present invention is to solve the problems of the prior art as described above, an object of the present invention, the gravure printing of microcapsule ink is possible, and even when used in food or household packaging, etc. The present invention provides a fragrance ink composition for gravure printing, a printing method and a print using the same, which are excellent in the resistance of the capsule to solvents and which can be suitably used for gravure printing.

The above object of the present invention is a fragrance ink composition containing a fragrance microcapsule, comprising: 80 to 95 wt% of an aqueous printing ink; And a odor microcapsules composition comprising 5 to 20% by weight of a odor microcapsules and a solvent.

In one embodiment of the present invention, the fragrance microcapsule composition further comprises an additive, such as an emulsifier, 25 to 50 parts by weight of the fragrance microcapsules, 45 to 75 parts by weight of the solvent and an additive 1 such as the emulsifier It is preferable to contain 2 weight part.

In one embodiment of the present invention, the aqueous printing ink, 45 to 60 parts by weight of acrylic resin; 30 to 60 parts by weight of a solvent and 1 to 4 parts by weight of an additive; wherein the solvent is 35 to 50% by weight of water, 45 to 60% by weight of ethanol, any one or a mixture of two or five of methanol or isopropyl alcohol 5 To 10% by weight, wherein the additive is preferably at least one additive selected from the group consisting of an antifoaming agent, a wax, a slipping agent, a pH adjusting agent and a heat resistant reinforcing agent.

In one embodiment of the present invention, the fragrance microcapsule is preferably composed of a common fragrance and crosslinking agent in the interior and one or more outer wall layers.

In one embodiment of the present invention, it is preferable that the micro-capsule having a particle size of 3 μm or less contains 50 wt% or more with respect to the entire micro capsule.

The above object of the present invention is also achieved by a gravure printing method and a printed matter using the above ink composition.

In one embodiment of the present invention, the printing method of the cylinder for printing during gravure printing is preferably a laser engraving engraving method constituting a passage between the dot and the dot.

In one embodiment of the present invention, the printing cylinder at the time of engraving the printing cylinder is 150 to 300 lines, the depth of the cylinder is preferably 15 to 46㎛.

In one embodiment of the present invention, the coating thickness of the fragrance ink composition is preferably 3 to 8 mu m.

In one embodiment of the present invention, the drying temperature after application of the fragrance ink composition is 60 to 65 ℃, the drying time is preferably 120 to 200m / min.

In one embodiment of the present invention, the printed matter is preferably a food or household packaging.

In one embodiment of the present invention, it is preferable that a conventional oily or aqueous printing ink layer is formed on the substrate, and an odor ink layer which is a printing layer of the fragrance ink composition is formed on the oily or aqueous printing ink layer.

In one embodiment of the present invention, it is preferable that a conventional oily or water-based printing ink layer is formed on one surface of the substrate, and an odor ink layer, which is a printing layer of the fragrance ink composition, is formed on the other surface of the substrate.

Hereinafter, the fragrance ink composition according to the present invention, a printing method using the same, and a printed matter will be described in detail.

In the present invention, even when applied to gravure printing by adjusting the size of the odor microcapsules to be suitable for gravure printing. In addition, the fragrance microcapsule composition containing the fragrance microcapsules and the solvent is combined with an aqueous printing ink to form a fragrance microcapsule ink composition, and by controlling the blending ratio, it is possible to prevent the deterioration of the distribution of the fragrance microcapsules having a specific size and to aroma Keep it going. Further, even in the aqueous printing ink, the solvent is composed of a compound having a predetermined component, more preferably, a predetermined component to achieve the resistance of the capsule to a solvent equivalent to toluene without using toluene.

First, the fragrance microcapsules are formed to have a particle diameter of several μm, and in order to maintain preservation properties during gravure printing and after printing, the microcapsule may have a small particle diameter in the range of several μm. In the present invention, in particular, the particle size of the odor microcapsules is 3 μm or less (the lower limit is more than 0 μm). In this case, since the microcapsules are hardly destroyed during the process during gravure printing, the preservation during printing is excellent, and the preservation and transfer after printing are excellent. The condition is also excellent. Further, even when the particle size of the totally oriented microcapsules is only 50% by weight or more (upper limit of 100% by weight or less), the preservation properties and the state of transition during printing and after printing are good.

The particle size distribution control may be performed by removing or filtering relatively large particles larger than 3 μm through the mesh. By repeatedly performing such removal operations using a mesh, a desired particle size can be secured.

The fragrance microcapsules are made of an outer wall made of an internal fragrance, a crosslinking agent and an external melamine resin, yeast, starch or dextrin. The fragrance uses raw materials in the usual liquid state of the desired fragrance and such fragrances are well known. The crosslinking agent forms the outer wall of the capsule by a crosslinking reaction with, for example, melamine resin, yeast, starch or dextrin as formaldehyde.

In the present invention, the fragrance microcapsules are first mixed with a solvent to form a fragrance microcapsule composition, and the fragrance microcapsule composition is mixed with an aqueous printing ink described below.

The fragrance microcapsule composition is configured to contain 25 to 50 parts by weight of fragrance microcapsules (solids) and 45 to 75 parts by weight of a solvent such as distilled water. Furthermore, it may be configured such that 25 to 50 parts by weight of the aromatic microcapsule (solid content), 45 to 75 parts by weight of the solvent, and an additive component such as an emulsifier in total of 1 to 2 parts by weight. When the fragrance microcapsule (solid content) is in the above range, there is no breakage during the process, and the transition state and the post-printing storage property are improved.

The above flavor-oriented microcapsule composition is mixed by stirring at room temperature for 10 to 20 minutes with an aqueous printing ink to which no organic solvent such as toluene or MEK is added. At this time, the blending ratio is 80 to 95% by weight of the aqueous printing ink and 5 to 20% by weight of the fragrance microcapsule composition.

When the odor microcapsules composition is less than 5% by weight, the amount of odor after the process is small, and when the amount exceeds 20% by weight, there is no advantage in odor, and since the use of expensive capsules is unnecessary, the main cause of the cost increase. Not desirable

On the other hand, in the present invention, capsule resistance to a solvent equivalent to that of an organic solvent such as toluene can be attained by adjusting each component of the solvent and further compounding ratio in the aqueous printing ink.

Specifically, the aqueous printing ink uses a composition of an acrylic resin and a solvent, wherein the solvent is water; ethanol; And a mixed solvent of either methanol or isopropyl alcohol or a mixture of both. To adjust the degree of drying through the combination of water and ethanol, methanol or isopropyl alcohol is used to improve the film adhesion of the ink.

In the blending ratio, the aqueous printing ink composition, 35 to 50% by weight of water relative to 45 to 60 parts by weight of the acrylic resin; Ethanol 45-60 wt%; And 30 to 60 parts by weight of a solvent consisting of 5 to 10% by weight of any one or a mixture of methanol or isopropyl alcohol. The solvent has no problem due to the residual solvent (solvent remaining in printed materials such as packaging materials after printing) at the above composition ratio. Meanwhile, the composition may further include 1 to 4 parts by weight of an antifoaming agent, a wax, a slipping agent, a pH adjusting agent, or a mixture of two or more of the heat resistant reinforcing agent.

When applying the above-mentioned fragrance ink composition (aqueous printing ink + fragrance microcapsule composition), the gravure printing engraving method includes helio, mangravure, electronic engraving, laser method, and especially dots and dots so that the ink can be spread well. The laser engraving making method which comprises a channel | path in between is the most preferable.

At the time of engraving, the bow of the ink cylinder is preferably 150 to 300 lines and a depth of 15 to 46 μm.

If the bow is less than 150 lines, many capsules with a particle size larger than 3 µm will transfer, resulting in poor drying power and roughening the printed surface. On the other hand, in some cases, more athletes than 300 athletes are required, but in this case, it is possible to obtain the same effect as raising athletes by adjusting the depth below 300 athletes. It is preferable because there is no problem that the transfer power of the ink is lowered.

When the depth exceeds 46 μm, the printing color is improved, but the ink transfer state is not preferable because many capsules having a size larger than 3 μm are transferred, the drying power is reduced, and the ink itself is agglomerated and the surface is rough. If the depth is less than 15㎛ less fragrance microcapsules per cross-sectional area may be poor fragrance retention.

Therefore, in order to print an odor microcapsules having a particle diameter of 3 µm or less, it is preferable to manufacture a cylinder for ink with 150 to 300 lines in a depth of 15 to 46 µm. In the range of the bow and the depth of the bow, the amount of ink transfer appears to be as large as possible in the bow and as large as possible.

1 is a schematic view showing the layer structure of a printed matter (packaging material) according to one embodiment of the present invention.

As shown in FIG. 1, the fragrance ink composition as described above on the substrate 10 of the film or paper is subjected to gravure printing with a working speed of 120 to 200 m / min and a drying temperature of 60 to 65 ° C. 30 is formed. It is preferable that the application thickness of the said fragrance ink layer shall be 3-8 micrometers. In the present invention, in consideration of the fact that the size of the scent microcapsule particles is 3㎛ or less, the thickness of the scented ink layer is 3 μm or more, but the coating thickness of the scented ink layer is increased to 8 for the transition state of the ink and good odor. It is preferable to set it as micrometer or less.

2 and 3 are schematic diagrams showing the layer structure of a printed matter (packaging material) according to another embodiment of the present invention.

2, an oily or aqueous printing ink layer 20 is formed on one surface of the substrate 10 and the fragrance ink layer 30 is formed on the other surface of the substrate 10.

3 shows an oily or aqueous printing ink layer 20 to which a pigment is added between the fragrance ink layer 30 and the substrate 10. When the fragrance ink layer 30 is present between the substrate 10 and the printing ink layer 20, the fragrance ink layer 30 does not function properly even when the capsule is applied under a predetermined pressure and does not function properly even when broken. It must be provided on the outermost layer.

As described above, the method of overlaying the oil-based or water-based printing ink layer increases the adhesion, and in particular, forming the oil-based printing ink layer 20 and forming the fragrance ink layer 30 therein is preferable because the adhesion can be further enhanced. As the oil-based or water-based printing ink, conventional ones can be used.

Hereinafter, the present invention will be described in more detail by explaining preferred examples and experimental examples of the present invention. However, the present invention is not limited to the following examples, and various forms of embodiments can be implemented within the scope of the appended claims, and the following examples are only ordinary in the art while making the disclosure of the present invention complete. It is intended to facilitate the implementation of the invention to those with knowledge.

Experimental Example 1-Measurement of Tolerance (Degree of Endurance of Capsule by Solvent) and Fragrance Retention According to Solvent]

A solvent consisting of 40 wt% water, 50 wt% ethanol and 10 wt% methanol (Example), toluene (Comparative Example 1), MEK (Comparative Example 2), EA (Comparative Example 3), isopropyl alcohol (Comparative Example 4 ), 80% by weight of an aqueous printing ink containing 40 parts by weight of an acrylic resin in 60 parts by weight of each solvent of ethanol (Comparative Example 5) and methanol (Comparative Example 6) was prepared. -ST; 20 parts by weight of a solid content of 25 to 50 parts by weight and the same result was obtained in this experiment) was added to prepare a fragrance ink composition.

In order to confirm the capsule resistance to the solvent, the prepared fragrance ink composition was left for 10 days, 20 days, and 30 days, and then gravure printing was carried out to check whether the fragrance was rubbed by hand. If the scent is strong across the printing surface and has good resistance (“○”), if the scent is relatively weak in some of the printing surface and is medium in resistance (“△”), the scent is hardly spread across the printing surface This poor case ("x") was evaluated.

In order to confirm the fragrance retention, the fragrance ink composition prepared 1 day ago was uniformly gravure printed on paper and placed in a aging room at 45 ° C. for 6 months. After that, I tried to improve by rubbing by hand. Here, too, when the fragrance is thick throughout the printing surface and has good fragrance retention ("○"), when the fragrance is relatively weak in some of the printing surface and has a moderate fragrance retention ("△"), the fragrance is spread throughout the printing surface. The case where the fragrance retention property was bad because it hardly came out was evaluated ("x").

Table 1 shows each measurement result.

10 days 20 days 30 days Enjoyability Example ○ ○ ○ ○ Comparative Example 1 ○ ○ ○ ○ Comparative Example 2 △ △ × × Comparative Example 3 △ △ × × Comparative Example 4 ○ △ △ △ Comparative Example 5 ○ △ △ △ Comparative Example 6 ○ △ △ △

As can be seen from the above, toluene (Comparative Example 1) was the most excellent resistance of the capsule to the solvent, MEK (Comparative Example 2), EA (Comparative Example 3) was significantly lower the resistance of the capsule to the solvent, The feature is completely gone. On the other hand, isopropyl alcohol (Comparative Example 4), ethanol (Comparative Example 5), methanol (Comparative Example 6) each had a similar resistance of the capsule to the solvent, but the capsule resistance to the solvent over time decreased. In the case of the solvent of the example, the capsules were excellent in resistance to the solvent, and in terms of fragrance retention, they were found to be equivalent to toluene.

Experimental Example 2-Measurement of Fragrance Retention According to the Mixing Ratio

The change in the fragrance retention was measured by adjusting the amounts of the aqueous printing ink and the fragrance microcapsule composition of the example of Experimental Example 1, respectively. Fragrance retention was measured in the same manner as in Experiment 1.

Table 2 shows the measurement results.

Flavored Microcapsule Composition Content Enjoyability 3 wt% × 4 wt% × 5 to 20% by weight ○

As can be seen from the above, when the fragrance microcapsule composition is contained in less than 5% by weight relative to the aqueous printing ink, there is little fragrance retention, while the fragrance microcapsule composition is in the range of 5 to 20% by weight with respect to the aqueous printing ink. The fragrance retention was good.

According to the present invention, the fragrance microcapsules are not destroyed during gravure coating, and in particular, even when used in the field of packaging materials requiring hygiene or stability, such as food or household packaging, there is no problem, and at the same time, the capsule is excellent in solvent resistance. And is particularly suitable for gravure printing. Therefore, the printing method of the conventional fragrance ink can overcome the limitation of the screen or offset printing and can further expand the application area.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.

Claims (11)

In a fragrance ink composition containing a fragrance microcapsule, 80-95 wt.% Aqueous printing ink; And A fragrance ink composition comprising 5 to 20% by weight of a fragrance microcapsule composition comprising a fragrance microcapsule and a solvent. delete The method of claim 1, The fragrance microcapsules have a particle size of more than 0 μm and 3 μm or less, and the fragrance microcapsules having the particle size are contained in an amount of 50 wt% or more and 100 wt% or less with respect to the total microcapsules. The method of claim 1, The flavor microcapsules composition further comprises an emulsifier, 25 to 50 parts by weight of the flavor microcapsules; 45 to 75 parts by weight of the solvent; And A fragrance ink composition comprising 1 to 2 parts by weight of the emulsifier. The method of claim 1, wherein the aqueous printing ink, 45 to 60 parts by weight of acrylic resin; 30 to 60 parts by weight of a solvent composed of 35 to 50% by weight of water, 45 to 60% by weight of ethanol, 5 to 10% by weight of any one or a mixture of methanol or isopropyl alcohol; And 1 to 4 parts by weight of at least one additive selected from the group consisting of an antifoaming agent, a wax, a slipping agent, a pH adjusting agent and a heat resistant reinforcing agent. In the printing method, A gravure printing method using the fragrance ink composition according to any one of claims 1 and 3 to 5. The method of claim 6, The gravure printing method of the printing cylinder during the gravure printing method characterized in that the laser engraving engraving system constituting a passage between the dot and the dot. The method of claim 7, wherein Gravure printing method characterized in that the bow of the printing cylinder at the time of engraving the printing cylinder is 150 to 300 lines, the depth of the cylinder is 15 to 46㎛. In print, A printed matter comprising a fragrance ink layer composed of the fragrance ink composition according to any one of claims 1 to 5. The method of claim 9, An oil-based or water-based printing ink layer is formed on a substrate, and the fragrance ink layer is formed on the oil-based or aqueous printing ink layer. The method of claim 9, An oil-based or water-based printing ink layer is formed on one surface of the substrate, and the fragrance ink layer is formed on the other surface of the substrate.

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