WO2020212765A1

WO2020212765A1 - Board marker ink composition and method for manufacturing same

Info

Publication number: WO2020212765A1
Application number: PCT/IB2020/050589
Authority: WO
Inventors: 준서 유브라이언; 김성은
Original assignee: 주식회사 제이케이테크; 준서 유브라이언
Priority date: 2019-04-17
Filing date: 2020-01-27
Publication date: 2020-10-22
Also published as: KR102056352B1

Abstract

Provided is a method for manufacturing a board marker ink composition used for a board marker which comprises a pen holder, an ink-containing filter accommodated in the pen holder, and a nib exposed on one side of the pen holder and receiving ink from the filter through only capillary action, and does not include a valve for controlling the flow of ink, the method comprising: a first stirring step for adding 20.0-25.8 parts by weight of a sizing agent and 117.1-161.3 parts by weight of an ink stock solution to 100 parts by weight of a solvent, and stirring to form a first mixture; and a second stirring step for adding an additive containing 1.4-3.2 parts by weight of a dispersant to the first mixture and stirring the resultant mixture to form an ink composition.

Description

【Specification】

【Name of invention】

Board marker ink composition and method for manufacturing the same

【Technical field】

The present invention relates to a board marker, and more particularly, to an ink composition for a board marker that is easy to write and erase on a glossy or matte board and does not cause scattering of fine ink powder, and to a method of manufacturing the same.

【Background description】

Filter type whiteboard marker ink was developed in the United States about 60 years ago, and has been widely used in schools, academies, offices, and homes since then.

Conventional filter type board markers accommodate cotton (中綿, Fi l ter) moistened with ink in a pen holder, and use a nib made of felt or synthetic resin. Ink in the pen stand moves to the pen tip by the capillary action, and the porosity of the pen tip is about 45 to 55%, and the ink viscosity is also maintained at about 8 to 14 cps.

However, in the existing filter type board marker ink, fine ink powder may be scattered in the air when you erase the handwriting after writing on the white board, and the fine ink powder may enter the respiratory tract of the human body and harm health. In addition, the ink written on the surface of the whiteboard penetrates and adheres to the surface of the board as time passes, leaving ink stains or afterimages on the surface of the whiteboard. Contamination by such stains or afterimages requires frequent replacement of the board. Being the reason.

In addition, matte whiteboards for electronic boards and non-reflective (matte) whiteboards for project beam projection, which are used as part of the improvement of eco-friendly classrooms, have been widely used in recent years. have. However, the existing filter-type board marker ink on the market is firmly adhered to the surface after a certain period of time after writing, making it more difficult to erase than a glossy board, and in some cases, it is not erasing at all.

Existing filter-type board marker inks have different quick drying properties depending on the product. In the case of quick-drying ink, if the lid of the board marker (CAP) is opened for a certain period of time, the nib (NIB) will dry out, making it impossible to use the pen, and the written handwriting also volatilizes and does not erase after a certain period of time. The ink adheres to the white board, causing serious contamination (afterimage), which provides a problem that requires frequent replacement of the board.

As for solving the above-described problem, Korean Patent Registration No. 10-1096756 (registered on Dec. 14, 2011) discloses an ink composition for a white board marker. In the board marker to which the ink composition is applied, ink is not directly wetted with a cotton (中綿, Fi l ter) to move by capillary action, but an ink that forms the viscosity of the ink to about 20 cps to 30 cps is added to a sponge. It is a form that is wetted and transferred to the nib, and the porosity of the sponge is maintained at about 70ppm to 80ppm, and the porosity of the nib is limited to the pen structure that must be maintained at about 65~75%. Was developed.

In addition, the method of delivering ink to the nib does not transfer the fresh ink stored in the pen holder to the capillary tube, but directly delivers the required amount to the sponge by pressing (pumping) the nib. It is limited only to the way you do it.

Another Korean Patent Registration No. 10-0889574 (registered on March 12, 2009) discloses an ink composition for a marker pen. The board marker is a pen structure that is widely used in the market, that is, a filter is used and ink is transferred by capillary action. However, when using it, the ink wetted with the filter is hardly transferred to the pen tip, so the writing is difficult. It does not work, and in matte boards for screens, the erasability is remarkably poor and the contamination of the board is also severe. 2020/212765 ?01/162020/050589

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Problems may arise.

【Detailed description of the invention】

【Technical task】

The present invention is intended to solve the above-described problems, and targets a board marker including a pen tip formed of felt or synthetic resin, using a filter containing ink in the pen holder, but not leaving a stain or an afterimage on the plate surface of a glossy or matte board. It provides an ink composition for board markers capable of suppressing the generation of fine ink powder and a method of manufacturing the same.

The present invention provides an ink composition for a board marker and a method for manufacturing the same, which can prevent contamination by ink stains or afterimages on the board surface, extend the service life of the board, and solve an increase in cost due to board replacement.

【Technical solution】

According to an exemplary embodiment of the present invention for achieving the objects of the present invention described above, the pen holder, the filter accommodated in the pen holder and holding ink, and the pen holder are exposed to one side of the pen holder and receive ink from the filter using a capillary action. The method of manufacturing the ink composition for board markers used for board markers including a pen nib but not including a valve that controls the flow of ink, is to add 20.0-25.8 parts by weight of the size agent and 117.1 to 161.3 parts by weight of the ink stock solution to 100 parts by weight of the solvent. And a first stirring step of forming a first mixture by stirring, and a second stirring step of forming an ink composition by stirring an additive containing 1.4 3.2 parts by weight of a dispersant in the first mixture.

The first stirring step may be performed under the setting conditions at a temperature of about 55 to 651, preferably from about 601 to 480 to 530, preferably about 50 Ah. The first stirring step is about 1.5 to 2.5 hours, preferably for about 2 hours, can be carried out by stirring the bath. 2020/212765 ?01/162020/050589

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have.

In the second stirring step, additives are 4.3-5.8 parts by weight of silicone, 4.3-5.8 parts by weight of releasing agent, 8.6-11 .0 parts by weight of plasticizer, 14.3 to 17.7 parts by weight of surfactant, and 2.9-4.8 parts by weight of drying retardant. It may contain, and components such as the additive may be adjusted based on 100 parts by weight of the solvent.

The second stirring step may be performed for at least 3 hours by sand milling set at a temperature of about 55 to 651, preferably about 601 to 480 to 530印此, preferably about 500.

The ink composition may be produced based on a filter having a porosity of about 55 to 60% and a pen tip having a porosity of about 55 to 65%, and the ink viscosity may be adjusted to have an ink viscosity of about 10 to 1¾1).

According to an exemplary embodiment of the present invention for achieving the objects of the present invention described above, the pen holder, the filter accommodated in the pen holder and holding ink, and the pen holder are exposed to one side of the pen holder and receive ink from the filter using a capillary action. The manufacturing method of the ink composition for board markers used for board markers including pen nibs is the first in which 100 parts by weight of a solvent are mixed with 10 to 17. 1 parts by weight of a pigment, 12.5-24.3 parts by weight of a sizing agent, and 2.5-4.3 parts by weight of a dispersant. Forming a mixture, grinding to form an average particle size of the pigment in the first mixture of 0.3 to 0.8 by sand milling, and the base ink stock solution 87.5-117 to the first mixture. 1 part by weight, 7.5-11 .4 parts by weight of plasticizer, 3 .8-5 .7 parts by weight of mold release agent, 3.8-5.7 parts by weight of silicone agent, 7.5-11 .4 parts by weight of surfactant and 2.5-5.7 parts by weight of drying retardant It may include the step of forming an ink composition by adding and stirring parts by weight.

The step of pulverizing the first mixture is about 55 to 651, preferably about 900 to 1100 at a temperature of about 601, preferably about 10 Ah, at least 4 hours by sand milling 2020/212765 ?01/162020/050589

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Can be done.

The step of forming the ink composition may be performed at a temperature of about 55 to 651, preferably about 601, under a setting condition of 480 to 530, preferably about 50 Ah.

The step of forming the ink composition may be performed by stirring for about 1.5 to 2.5 hours, preferably about 2 hours.

【Effects of the Invention】

The ink composition of the present invention can be completely agglomerated and peeled off by applying an ink composition and manufacturing process that have never been applied to filter-type board marker inks so far. You can overcome the problems that exist.

Specifically, it does not leave stains or afterimages on the surface of a glossy or matte board, and it is possible to prevent the inflow through the respiratory tract of the human body by suppressing the generation of fine ink powder.

The ink composition of the present invention can prevent contamination by ink stains or afterimages on the board surface, extend the service life of the board, and solve an increase in cost due to board replacement.

【Simple explanation of drawings】

1 to 3 are the ink compositions according to Examples 1 and 2 prepared according to an embodiment of the present invention, and the degree of contamination of the board on the glossy white board, erasability, and erasure by using the ink compositions of Comparative Examples 1 and 2 These are pictures to compare the methods.

4 to 6 are the ink compositions according to Examples 1 and 2 prepared according to an exemplary embodiment of the present invention, and the degree of contamination of the board on the matte board, erasing and erasing methods using the ink compositions of Comparative Examples 1 and 2 These are photos to compare. 【Forms for the implementation of the invention】

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and contents described in other drawings under the above rules may be cited and described, and contents that are determined to be obvious to those skilled in the art or repeated may be omitted.

Example 1 (Embodiment 1)

In this experiment, the board marker according to an embodiment of the present invention includes a pen holder, a filter accommodated in the pen holder to hold ink, and a pen nib exposed to one side of the pen holder and receiving ink from the filter using a capillary action. It is formed using cotton and has a porosity of about 55 to 60%, and the pen tip is formed using felt or synthetic resin, and may have a porosity of about 55 to 65%. And, the ink composition may be provided by adjusting to have an ink viscosity of about 10 ~ 18cp.

In order to compose an ink suitable for these criteria, an arbitrary ink stock solution is selected from among the existing filter type marker inks that are widely marketed at present, and the first ink stock solution according to the present embodiment is used in the randomly selected ink stock solution. To the fourth stirring step to prepare an ink composition.

First, a first stirring step of forming a first mixture may be performed by adding and stirring 20.0-25.8 parts by weight of a solvent based on 100 parts by weight of a solvent.

Here, the sizing agent can be used at least one of ethylene vinyl acetate (Ethylene Vinyl Acetate: EVA), polyvinyl acetate, polyvinyl butyral (PVB), and nitrocellulose ((NC).

For reference, the sizing agent adjusts the viscosity between additives in the ink composition, enhances the peelability of the ink, When erasing after writing, it can prevent the ink pigment from scattering in the air. In the first stirring step, 117.1-161.3 parts by weight of the existing ink stock solution is added together, and the mixture can be stirred by boiling water at a temperature of about 60 ^° C and about 500 rpm for about 2 hours. Through this process, the first mixture may be finally formed.

In addition to the first mixture stirred with hot water through the second stirring step, 1.4 to 3.2 parts by weight of dispersant, 4.3-5.8 parts by weight of silicone, 4.3-5.8 parts by weight of release agent, 8.6-11.0 parts by weight of plasticizer, surfactant 14.3-17.7 A second stirring step of forming a second mixture may be performed by stirring the additive including parts by weight and 2.9-4.8 parts by weight of the drying retarder.

Example 2 (Embodiment 2)

The ink composition according to the present embodiment forms a first mixture by mixing 10 to 17.1 parts by weight of a pigment, 12.5-24.3 parts by weight, and 2.5-4.3 parts by weight of a dispersant to 100 parts by weight of a solvent, and pulverizing the first mixture by sand milling. Thus, it may be pulverized so that the average particle size of the pigment in the first mixture is about 0.3 to 0.8 by setting it to about 100 Orpm at a temperature of about 60 ^° C. At this time, it can be performed for at least 3 or 4 hours.

In the first mixture, the base ink stock solution 87.5-117.1 parts by weight, plasticizer 7.5-11.4 parts by weight, release agent 3.8-5.7 parts by weight, silicone agent 3.8-5.7 parts by weight, surfactant 7.5-11.4 parts by weight, and drying retardant 2.5-5.7 parts by weight After adding the part, it can be mixed again at a temperature of about 60 ^° C and stirred at about 500 rpm for 3 hours or more.

Comparison 1, 2 (Comparison 1, 2)

Comparative Example 1 is a filter-type whiteboard marker ink that is commercially available on the market, and Comparative Example 2 is formulated under conditions outside the minimum and maximum ranges of the numerical values shown in Examples 1 and 2. [Table 1]

[Table 1] is evaluated based on the degree of contamination of the board, erasability, erasing method, ink drying, board life, and ink scattering according to Example 1, Example 2, Comparative Example 1 and Comparative Example 2 in a glossy white board. will be.

Specifically, about 5 _§ of the ink composition corresponding to each of Examples 1 and 2, Comparative Examples 1 and 2 was injected into a board marker including a pen holder, a filter, and a pen tip, and the glossiness was about 65 at a reflection angle of 130 ^° . After writing specific characters with board markers on a general glossy whiteboard between -75 ^° , writing at regular time intervals and then comparing over time.

1-1. (Glossy) Contamination on the board surface (whether ink remains)

As described above, by using the ink compositions prepared according to Examples 1 and 2 and Comparative Examples 1 and 2, writing and erasing were repeated on a general glossy white board at regular intervals to evaluate contamination over a short or long period of time.

In the glossy board, short term is 1 to 30 days, medium term is 30 to 120 days, and long term is 2020/212765 ?01/162020/050589

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It was defined as 120 to 180 days.

Referring to FIG. 1, when the ink compositions of Examples 1 and 2 were used, the board surface was kept clean without adhesion of ink afterimages and ink contamination, resulting in'good' (£00(1) results.

On the other hand, in Comparative Example 1, in the case of a short term (1 to 30 days), the surface was kept clean to some extent, but the afterimages of ink and ink contamination were finely present, showing a result of being'inadequate' (11 £00 (1)). However, in the case of a long-term (120 to 180 days), the result of'bad' ratio 3 (1) was provided, such as ink afterimages and ink contamination adhered to the board surface and partially stained on the surface.

Comparative Example 2 could be said to be generally clean, but it was judged as a result of being'inadequate' due to the fine presence of ink afterimages and ink contamination.

1-2. (Glossy) Handwriting Eumseong

As described above, by using the ink compositions prepared according to Examples 1 and 2 and Comparative Examples 1 and 2, writing and erasing was repeated on a regular glossy white board at regular time intervals, while visually evaluating the erasability for a short or long period of time. I did.

In the glossy board, the short term was defined as within 1 to 7 days, the medium term as 7 to 30 days, and the long term as more than 30 days.

As a result, as shown in Fig. 2, when the ink compositions of Examples 1 and 2 were used, a result of'good' () was obtained in which the writing contents were erased cleanly.

On the other hand, in Comparative Example 1, in the case of a short term (1-7 days), it was not as clean as Examples 1 and 2, but it was cleared to some extent and some of the text was left behind, showing a result of'insufficient' (11 £00 (1)). However, as it progressed in the medium term (7 to 30 days) and long term (more than 30 days), the writing contents began to show a state of'bad' 0 (1), which was difficult to erase. 2020/212765 ?01/162020/050589

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Comparative Example 2 was determined as a result of'insufficient' in which some of the written letters were erased and some remained.

1-3. (Glossy) Erased when handwriting is erased (exfoliation of ink)

The method of erasing is that the surface of the glossy whiteboard is placed in a vertical or horizontal state, and the handwriting is erased after writing a spiral line, a straight line, or a general character. The method of erasing the contamination of the board surface and the ink is completely like a spider web. The phenomenon of lumping and peeling (erased) from the surface was evaluated visually as follows.

For reference, the written content was partially erased around the middle text, and as shown in FIG. 3, when the ink composition of Examples 1 and 2 was used, the writing content was peeled from the board surface without contamination, Was completely clumped like a spider web and completely peeled off the surface. In the photo, vowels and consonants in the middle of the'poetry' were neatly separated.

On the other hand, in Comparative Example 1, the writing contents were not peeled off from the board surface, and ink powder adhered to the board surface to partially contaminate the board surface, and it was found that peeling was not well performed when the letters were partially retained. have.

In Comparative Example 2, fine ink powder partially contaminated the board surface, and it was not completely peeled off but only partially peeled off.

1-4. （Glossy） Ink drying

After writing, the pen lid (31)) was evaluated based on the time the pen tip (11) dries after opening for a certain period of time.

When the ink compositions of Examples 1 and 2 were used, the pen tip remained moist even after 1 to 3 days, and writing was possible. However, in the case of Comparative Examples 1 and 2, as 1 hour elapsed, the pen nib dried up, making it impossible to write any more. 1-5. (Glossy) Board life (surface contamination)

Using the ink composition prepared according to Examples 1 and 2 and Comparative Examples 1 and 2, writing and erasing was repeated on a general glossy white board at regular time intervals, while contaminant conditions for a short or long period of time and the need to replace other boards were visually observed. Evaluated.

In the glossy board, the short term was defined as 1 to 30 days, the medium term as 30 to 120 days, and the long term as 120 to 180 days.

As a result, when the ink compositions of Examples 1 and 2 were used, the surface of the board was kept clean without adhesion of ink afterimages and ink contamination, and the life of the board was maintained to be'good' (£00 (1)).

On the other hand, in Comparative Example 1, an ink afterimage and ink contamination adhered to the plate surface of the white board and partially stained the surface of the white board, thereby providing a result of severely shortening the life of the board.

Comparative Example 2 could be said to be clean to some extent, but it was determined as a result of'inadequate' in which the replacement of the board was emphasized due to the presence of fine ink afterimages and ink contamination.

[Table 2]

[Table 2] shows the degree of contamination of the board, erasability, erasing method, ink drying, board life, and ink scattering according to Example 1, Example 2, Comparative Example 1 and Comparative Example 2 in a matte screen board. 2020/212765 ?01/162020/050589

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It was evaluated as a standard.

Similar to the comparison using a glossy white board, about 5 _§ of the ink composition corresponding to each of Examples 1 and 2, and Comparative Examples 1 and 2 was injected into a board marker including a pen holder, a filter and a pen tip, and the reflection angle 130 ^° gloss were conducted compared in accordance with the general gloss after filling a specific character such as a board with a marker on a whiteboard, the writing time after a specific time interval of between about 65-75 ^° from.

4 to 6 are the ink compositions according to Examples 1 and 2 prepared according to an exemplary embodiment of the present invention, and the degree of contamination of the board on the matte board, erasing and erasing methods using the ink compositions of Comparative Examples 1 and 2 These are photos to compare.

2-1. (Matte) Board surface contamination (whether ink remains)

As described above, using the ink compositions prepared according to Examples 1 and 2 and Comparative Examples 1 and 2, writing and erasing was repeated on a general matte screen board at regular intervals to evaluate contamination over a short or long period of time.

Since the matte board has a relatively rough surface, the short term is defined as 1 to 3 days, the medium term is 3 days, and the long term is defined as 7 to 30 days, which is a remarkably short period compared to the glossy board.

Referring to FIG. 4, when the ink compositions of Examples 1 and 2 were used, the board surface was kept clean without adhesion of ink afterimages and ink contamination, resulting in'good' (required 00(1) results).

On the other hand, in Comparative Example 1, irrespective of short-term or long-term, ink afterimages and ink contamination adhered to the plate surface of the screen and partially stained the surface, providing a result of'insufficient' or'defective'.

Comparative Example 2 could not be said to be generally clean, and ink afterimages and ink contamination 2020/212765 ?01/162020/050589

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It was judged as a result of being'inadequate' because it existed finely.

2-2. (Matte) Handwriting eraser

As described above, by using the ink composition prepared according to Examples 1 and 2 and Comparative Examples 1 and 2, writing and erasing was repeated on a general matte screen board at regular time intervals, while visually evaluating the erasability for a short or long period of time. I did.

In the glossy board, the short term was defined as within 1 day, the medium term as 1 day, and the long term as 7 days or more. As a result, as shown in FIG. 5, when the ink compositions of Examples 1 and 2 were used, a result of'good' () was obtained in which the writing contents were erased cleanly.

On the other hand, in Comparative Example 1, from a short term (1-7 days), the writing contents began to show a state of'insufficient' or'poor' ratio 3 (1), and in Comparative Example 2, only part of the text was generally It was judged as a result of being erased and partially remaining'insufficient'.

2-3. (Matte) Erased when handwriting is erased (the degree of peeling of ink)

The method of erasing is that the surface of the matte screen board is placed in a vertical or horizontal state, and the handwriting is erased after writing a spiral line, a straight line, or a general character. The method of erasing the contamination of the board surface and the ink is completely like a spider web. The phenomenon of lumping and peeling (erased) from the surface was evaluated visually as follows.

For reference, the written content was partially erased centering on the middle text, and as shown in FIG. 6, when using the ink composition of Examples 1 and 2, the writing content was peeled off from the surface of the matte board without contamination. ， Ink completely peeled off. In the photo, you can see that the part corresponding to'Example' has been neatly peeled off.

On the other hand, in Comparative Example 1, the writing contents did not peel off cleanly from the board surface, and ink powder adhered to the board surface, partially contaminating the board surface, 2020/212765 ?01/162020/050589

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It can be seen that peeling is not well done when the letters are partially left.

2-4. (Matte) ink drying

When the ink compositions of Examples 1 and 2 were used, the pen tip remained moist even after 1 to 3 days, and writing was possible. However, in the case of Comparative Examples 1 and 2, as 1 hour elapsed, the pen nib dried up, so that further writing was not possible.

2-5. (Matte) Board life (surface contamination)

Using the ink composition prepared according to Examples 1 and 2 and Comparative Examples 1 and 2, writing and erasing was repeated on a regular gloss screen at regular intervals, while visually evaluating the contamination status over a short or long period of time and the need to replace other boards. I did.

In the glossy board, the short term is defined as 1-3 days, the medium term is 3 days, and the long term is defined as 7-30 days.

On the other hand, in Comparative Example 1, the result of'defect' ratio 3 (1) was provided in which the life of the board was severely shortened, such as ink afterimages and ink contamination adhered to the plate surface of the screen and partially stained on the surface.

Comparative Example 2 could be said to be somewhat clean, but ink afterimages and ink contamination 2020/212765 ?01/162020/050589

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It was judged as a result of being'inadequate' that the replacement of the board was emphasized due to the presence of minutely.

Evaluation for Comparative Example 1

As can be seen from the results of Examples 1 and 2, the degree of ink contamination on the surface of the board, long/short erasure of handwriting, peelability of handwriting, sharpness of handwriting, dryness of the pen tip, etc. were compared to Comparative Example 1 [Table 1] As can be seen in [Table 2] and [Table 2], all were excellent.

From the standpoint of the level of contamination on the board surface (whether ink remains), in Comparative Example 1 using the existing filter type white board marker ink, it can be seen that the ink contamination remains severely on the board surface. It can be understood that as the alcohol, which is an additive of the ink, is volatilized, it is strongly adhered to the board in the form of fine ink powder, and the degree of contamination becomes more severe as time passes.

On the other hand, in the case of Examples 1 and 2, the method of erasing even if it exceeds about 4 weeks is not a method in which the written handwriting adheres in the form of fine ink powder to cause contamination, but the handwriting is dried like a spider web and completely peeled off from the surface. As it has a feature that is erased, it can be seen that contamination of the board surface does not occur.

In particular, the degree of contamination of the ink on the matte screen board shows that the ink is completely adhered to the irregularities on the surface, and the degree of contamination is very severe, indicating that the handwriting cannot be erased after writing.

From the viewpoint of handwriting erasure, it can be seen that in Comparative Example 1, the short-term erasing property of about 1 week is good for a general whiteboard, but it is not easily erased after a long period of time, such as 1 to 4 weeks after writing. In the non-reflective board for project projection, not only does the erasure of the handwriting appear very bad results from 1 day after writing.

After one week, the ink is completely adhered to the board surface and is almost indelible. 2020/212765 ?01/162020/050589

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In the comparative evaluation of eraseability and ink contamination, in the case of Examples 1 and 2, excellent erasability was maintained even after 4 weeks of writing and ink contamination on the board surface hardly occurred, so the evaluation of handwriting erasure and ink contamination was severely compared. You can see the result.

From the viewpoint of the method of erasing when handwriting is erased (the degree of peeling of the ink), in the case of Examples 1 and 2, when a certain time elapses after writing on a white board, as can be seen from the above result, the handwriting becomes like a spider web when erasing the handwriting. It is peeled off and completely peeled off, resulting in no adhesion of the remaining ink to the surface of the board, and almost no remaining contaminant parts of the ink, whereas in the case of Comparative Example 1, the handwritten ink adhered to the surface of the board in the form of fine powder. You can see the result that contamination always exists.

In particular, in the matte board, it can be seen that the degree of contamination is very severe because the ink is completely adhered to the irregularities on the surface.

From the point of view of ink drying, as can be seen from the above results, in the case of the dryness of the ink on the nib, in Comparative Example 1, when the pen lid (31)) was opened, the pen tip dries out after 1 hour or 1 hour. Writing is not possible, but in Examples 1 and 2, even when the pen cap (31)) is opened for about 3 days, the pen tip) remains moist and constant, resulting in a possible writing result, resulting in rapid dryness of the pen tip ratio). As a result, it is possible to expect a result that prevents the problem of being discarded due to inability to write.

Evaluation of Comparative Example 2

In the evaluation of Examples 1 and 2, and Comparative Example 2, the ink compositions deviating from the minimum and maximum numerical ranges indicated in [Table 1] and [Table 2] as a result of incomplete mixing between pigments and additives. As can be seen, it shows that there is some difference from the object to be pursued by the present invention.

For example, a filter with a porosity of 55 to 60% and a pen tip with a porosity of 55 to 65% 2020/212765 ?01/162020/050589

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In the case of using, in the case of Comparative Example 2, the viscosity was lowered and the ink overflowed or the viscosity was too high, resulting in the ink not being ejected by the pen tip, resulting in a problem in which writing was impossible. In addition, even in the written handwriting, bubbles were generated, contracted, or spread because the balance of all components was out of optimal conditions. There was also a problem that the clarity of the handwriting gradually faded. As a result of this, it can be seen that problems in dispersibility and stability are found as a result of improper mixing between pigments, resins, and additives, and thus the goal of the present invention cannot be achieved.

Taken together, as can be seen in [Table 1] and [Table 2], the evaluation of Example 1 and Example 2 and Comparative Example 1 showed that the degree of ink contamination, the presence or absence of fine ink powder, long/short erasure change, In the comparative evaluation of the ink drying properties of the nib under the open condition, Examples 1 and 2 are derived as far superior results compared to Comparative Example 1 as well as Comparative Example 2.

In addition, in the case of an experiment comparing the main features of the present invention, in particular, when looking at the comparative evaluation on a matte (non-reflective) white screen board for project beam perspective with a reflection angle of 130 ^° and a gloss of 12 ^° to 18 ^° , In the case of Comparative Example 1, when erasing the written handwriting as shown in [Table 2], the handwritten ink spreads and scatters in the form of fine powder, and adheres to the board surface, resulting in severe contamination on the board and hardly erasing. In Example 1 and Example 2, as can be seen from [Table 2], the ink was peeled off and erased as if it was peeled off in a cobweb-like form. It shows unparalleled results.

As described above, although it has been described with reference to a preferred embodiment of the present invention, those skilled in the art will understand that various modifications and changes can be made to the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. There will be.

Claims

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【Scope of claim】

[Claim 1]

A pen holder, a filter accommodated in the pen holder to hold ink, and a pen nib exposed to one side of the pen holder and receiving ink from the filter using only a capillary action, but not including a valve that controls the flow of ink. In the manufacturing method of the ink composition for board markers used,

A first stirring step of forming a first mixture by adding and stirring 20.0-25.8 parts by weight of a sizing agent and 117. 1 to 161.3 parts by weight of an ink stock solution to 100 parts by weight of a solvent; And

A second stirring step of forming an ink composition by stirring an additive containing 1.4 3 .2 parts by weight of a dispersant in the first mixture; a method for preparing an ink composition for a board marker comprising.

[Claim 2]

The method of claim 1,

The first stirring step is a method for producing an ink composition for a board marker, characterized in that carried out under a setting condition of 480 to 530 zero at a temperature of 55 to 651.

[Claim 3]

The method of claim 2,

The first stirring step is a method for producing an ink composition for a board marker, characterized in that proceeding with a boiling water bath for 1.5 ~ 2.5 hours.

[Claim 4]

The method of claim 1,

In the second stirring step, the additive is 4.3-5.8 parts by weight of silicone, 4.3-5.8 parts by weight of release agent, 8.6-11 .0 parts by weight of plasticizer, surfactant in addition to the dispersant. 2020/212765 ?01/162020/050589

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14.3-17.7 parts by weight and 2.9-4.8 parts by weight of a drying retarder. Method for producing an ink composition for a board marker further comprising.

[Claim 5]

The method of claim 4,

The second stirring step is a method for producing an ink composition for a board marker, characterized in that it is performed at least 3 hours by sand milling set to 480 to 530 at a temperature of 55 to 651.

[Claim 6]

The method of claim 1

The ink composition targets a filter having a porosity of 55 to 60% and a pen tip having a porosity of 55 to 65%, and is formed to have an ink viscosity of 10 to 1 此1). Method for preparing the composition.

[Claim 7]

An ink composition for a board marker prepared by the method for producing an ink composition for a board marker according to any one of claims 1 to 6.

[Claim 8]

A board marker including a pen holder, a filter accommodated in the pen holder to hold ink, and a pen nib exposed to one side of the pen holder and receiving ink from the filter using only a capillary action, but does not include a valve for controlling the flow of ink. In the method for producing an ink composition for a board marker used

100 parts by weight of solvent, 10 to 17.1 parts by weight of pigment, 12.5-24.3 parts by weight of sizing agent, dispersant

Forming a first mixture of 2.5-4.3 parts by weight;

The average particle size of the pigment in the first mixture by sand milling is 0.3 to 0.8 2020/212765 ?01/162020/050589

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Grinding to form; And

In the first mixture, the base ink stock solution 87.5-117.1 parts by weight, plasticizer 7.5-11.4 parts by weight, releasing agent 3.8-5.7 parts by weight, silicone agent 3.8-5.7 parts by weight, surfactant 7.5-11.4 parts by weight, and drying retardant 2.5-5.7 parts A method of preparing an ink composition for a board marker comprising a step of forming an ink composition by adding and stirring parts by weight.

[Claim 9]

The method of claim 8,

The step of pulverizing the first mixture is a method for producing an ink composition for a board marker, characterized in that the sand milling is performed at least 4 hours at a temperature of 55 to 651 with a setting of 900 to 1100.

【Claim 10】

The method of claim 8,

The step of forming the ink composition is a method for producing an ink composition for a board marker, characterized in that it is carried out under a setting condition of 480 to 530 zero at a temperature of 55 to 651.

【Claim 11】

The method of claim 10,

The step of forming the ink composition is a method for producing an ink composition for a board marker, characterized in that the stirring for 1.5 to 2.5 hours proceeds.

【Claim 12】

An ink composition for a board marker prepared by the method for producing an ink composition for a board marker according to any one of claims 8 to 11.