KR102042386B1 - Ball pen refill including backflow preventive gel and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a ballpoint pen refill including backflow prevention gel, and a manufacturing method thereof, configured to add functional silica to prevent a rapid change in physical properties of the backflow prevention gel, thereby adjusting the temperature of the backflow prevention gel in response to an ambient temperature. The manufacturing method of a ballpoint pen refill including backflow prevention gel comprises the steps of: preparing backflow prevention gel by adding functional silica; coupling a ballpoint pen nib having an embedded ball bearing to a front surface of a transparent connection member; coupling a transparent tube to a rear surface of the transparent connection member; filling the transparent tube with ink; filling a rear surface of the ink filled in the transparent tube with the backflow prevention gel including the functional silica; and coupling a rubber cap to a front surface of the ballpoint pen nib.

Description

Ball-pen refill containing a backflow prevention gel and a method for manufacturing the same {BALL PEN REFILL INCLUDING BACKFLOW PREVENTIVE GEL AND MANUFACTURING METHOD THEREOF}

The present invention relates to a ballpoint pen refill comprising a backflow prevention gel and a method for manufacturing the same, which can adjust the temperature of the backflow prevention gel in response to the ambient temperature by incorporating functional silica to prevent sudden changes in physical properties of the backflow prevention gel.

The conventional anti-flow gel has a sharp change in physical properties according to environmental conditions, affecting the ink followability. If the ink followability is deteriorated, the ejection of ink for writing may stop, or the ink may leak when the pen tip is placed above the horizontal.

In particular, when the temperature drops sharply, the viscosity of the backflow gel may change by more than 20 times, which not only reduces the fluidity of the backflow gel but also forms an inner space as the distance between molecules decreases. There is a higher possibility that the problem occurs.

Republic of Korea Patent No. 10-0235906

The present invention is to solve the above problems, in order to prevent the sudden change in physical properties of the backflow gel by mixing functional silica to adjust the temperature of the backflow gel in response to the ambient temperature, ball-pen refill containing a backflow gel And its manufacturing method.

As a means for achieving the above object, the configuration of the production method of the present invention, comprising the steps of preparing a backflow prevention gel by adding functional silica; Coupling a ballpoint pen nib with a ball bearing therein to the front surface of the transparent connection member; Coupling a transparent tube to a rear surface of the transparent connecting member; Filling ink into the transparent tube; Filling a backflow prevention gel including functional silica on a back surface of the ink filled in the transparent tube; And bonding a rubber cap to the front surface of the ball point pen nib, wherein the rubber cap is based on 100 parts by weight of natural rubber, and 23 to 27 parts by weight of p, p'-oxybisbenzenesulfonylhydrazide, polylactic acid It is preferable to use what contains 10-15 weight part, 8-10 weight part of butylacrylates, 5-10 weight part of methyl methacrylates, and 1-3 weight part of epoxidized soybean oil.

The configuration of the present invention, the step of preparing the backflow prevention gel, the step of preheating the tank to 60 ℃; Adding a polyolefin-based resin to the preheated tank to prepare a base oil while stirring at 6.5 rpm for 15 minutes; 1 to 10 parts by weight of the functional silica equipped with a temperature-sensitive coating to the prepared base oil was stirred for 15 minutes at 7 rpm for primary mixing; Second mixing of the mixture, the mixture of which has been completed first, at 7 rpm for 30 minutes; Putting the mixture in which the secondary mixing is completed into a mill and stirring while stirring at 7 rpm for 105 to 115 minutes; Vacuum defoaming with stirring at 7 rpm for 65 minutes to remove bubbles generated in the milled mixture; And a packaging step.

In the configuration of the present invention, the step of preparing the base oil, it is preferable to use a base oil containing 50 to 80 parts by weight of polyalphaolefin, 10 to 50 parts by weight of polybutene.

The composition of the present invention, the first mixing step, silica; A temperature sensitive coating attached to the surface of the silica and having a porous structure; And a functional material filled in the temperature sensitive coated micropores, and the coating thickness is preferably 15 to 30 µm.

In the constitution of the present invention, the temperature sensitive coating is preferably such that when the ambient temperature is less than 18 ° C., the surface of the temperature sensitive coating is condensed and the micropores are expanded to partially expose the surface of the functional material that has been filled.

In the structure of this invention, it is preferable that the said functional substance uses a photo-thermal carbon material, and the diameter of a particle | grain is 0.5-3.0 micrometers on average.

As a means for achieving the above object, the configuration of the present invention, the ball-point pen nib ball ball embedded; A rubber cap coupled to the front surface of the ball pen nib; A transparent connection member coupled to the back of the ball pen nib; A transparent tube coupled to a rear surface of the transparent connecting member; An ink filled in the transparent tube; And a backflow prevention gel filled on the back surface of the ink and including functional silica, wherein the functional silica comprises: a temperature sensitive coating having a porous structure; And a photo-heating carbon material filled in the temperature sensitive coated micropores.

This invention can be applied to the actual industry, it is possible to control the temperature of the backflow prevention gel in response to the ambient temperature by incorporating functional silica to prevent a sudden change in physical properties of the backflow prevention gel.

1 is a cross-sectional view of a ballpoint pen refill containing a backflow prevention gel according to the present invention.
Figure 2 is a flow diagram of a ballpoint pen refill manufacturing method comprising a backflow prevention gel according to the present invention.
3 is a flow chart of a method for producing a backflow prevention gel according to the present invention.
4 is an exemplary view showing a state of the temperature sensitive coating according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. Other objects, features, and operational advantages, including the object, operation, and effect of this invention, will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not limited or limited only by the embodiments presented In addition, various changes, additions and changes are possible within the scope not departing from the technical idea of the present invention, as well as other embodiments that are equally clear.

In addition, the terms or words used in the specification and claims are defined on the basis that the inventor can properly define the concept of terms in order to best explain the invention in his own way, usually It should not be construed as being limited to the above or only a dictionary meaning, but should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention. As an example, singular forms include plural forms unless the context clearly indicates otherwise.

1 is a cross-sectional view of a ballpoint pen refill including a backflow preventing gel according to the present invention, and FIG. 2 is a flowchart of a method for manufacturing a ballpoint pen refill including a backflow preventing gel according to the present invention.

As shown in Figures 1 to 2, the configuration of the method for producing a backflow prevention gel according to the present invention, the step of preparing a backflow prevention gel (5) by adding functional silica (S10); Coupling the ball pen nib 1 with the ball bearing 11 to the front surface of the transparent connection member 2 (S20); Coupling the transparent tube (3) to the rear of the transparent connection member (2) (S30); Filling the transparent tube (3) with ink (S40); Filling the backflow preventing gel (5) containing functional silica on the back of the ink (4) filled in the transparent tube (S50); And a step (S60) of coupling a rubber cap 6 to the front surface of the ball point pen nib.

The rubber cap (6) is based on 100 parts by weight of natural rubber, p, p'- oxybisbenzenesulfonyl hydrazide 23 to 27 parts by weight, polylactic acid 10 to 15 parts by weight, butyl acrylate 8 to 10 parts by weight , 5 to 10 parts by weight of methyl methacrylate, 1 to 3 parts by weight of epoxide soybean oil is used.

The step (S10) of preparing the backflow prevention gel may include: preheating the tank to 60 ° C (S11); Adding a polyolefin-based resin to the preheated tank to prepare a base oil while stirring at 6.5 rpm for 15 minutes (S12); 1 to 10 parts by weight of a functional silica equipped with a temperature-sensitive coating to the prepared base oil was stirred for 15 minutes at 7 rpm for primary mixing (S13); Stirring the mixture of which the first mixing is completed for 30 minutes at 7 rpm (S14); Putting the mixture in which the secondary mixing is completed into a milling step and milling while stirring at 7 rpm for 105 to 115 minutes (S15); Vacuum degassing while stirring at 7 rpm for 65 minutes to remove bubbles generated in the mixture in which the milling is completed (S16); And a packaging step (S17).

In preparing the base oil (S12), a base oil including 50 to 80 parts by weight of polyalphaolefin and 10 to 50 parts by weight of polybutene is used.

The first mixing step (S13), the silica (1301); A temperature sensitive coating 1302 attached to the surface of the silica and having a porous structure; Functional silica (1300) comprising; a functional material (1303) filled in the temperature-sensitive coated micropores is used.

The temperature sensitive coating 1302 is attached to a part of the silica surface, and polar molecular bonds are formed on the surface of the exposed silica to gel. On the other hand, when the temperature sensitive coating 1302 is attached to the entire surface of the silica, there is a problem in that the gelation is not sufficiently made and the viscosity of the backflow prevention gel is lowered.

The milling step (S15) is performed to improve the uniformity, and if the milling time is insufficient, the followability of the backflow prevention gel may be reduced. When milling for more than 100 minutes, there was a problem that a part of the raw material evaporated and thus the viscosity reproducibility was lowered.

The vacuum degassing step (S16), when performed in less than 65 minutes does not sufficiently remove the bubbles in the backflow prevention gel, the transparency of the backflow prevention gel as well as the viscosity is lowered to affect the quality.

3 is an exemplary view of a state of the temperature sensitive coating according to the present invention.

As shown in FIG. 3, the thermosensitive coating 1302 is a functional material in which the micropores 1302a are expanded and filled as the surface of the thermosensitive coating 1302 is condensed when the ambient temperature is less than 18 ° C. A portion of the surface of 1303 is exposed to the outside.

A portion of the surface of the functional material 1303 is exposed to the outside to directly contact the light to absorb the light and generate heat.

The temperature sensitive coating 1302 thickness is used in the range of 15 ~ 30㎛. If the coating thickness is less than 15 μm, it is difficult to form the fine pores 1302 a on the surface, so it is not suitable for the manufacturing process. If the coating thickness is more than 30 μm, the flexibility of the coating 1302 is lowered, so that There is a problem that expansion is difficult to achieve.

The functional material 1303 uses a photo-heating carbon material and uses at least one of carbon black, carbon fiber, multi-walled carbon nanotubes, and single-walled carbon nanotubes. do.

When the diameter of the functional material 1303 particles is an average of 0.5 ~ 3.0㎛ used, if the diameter of the particle exceeds 3.0㎛ because filling is larger than the fine pores of the temperature-sensitive coating, when the diameter of the particle is less than 0.5㎛ There is a problem that the heat generation is insufficient to control the properties of the backflow prevention gel.

Experimental Example 1

A pen (Example 1, Comparative Example 1, Comparative Example 2) was prepared in order to evaluate the quality of the anti-reflux gel prepared according to the above process, and the following test was performed: the followability, impact, ink and reversal, and viscosity change test.

Followability was evaluated by continuously writing the pen with the writing tester under the following conditions and observing the state of the charge backflow inhibitor. At this time, the conditions of writing speed 4.5m / min, writing angle 65 °, writing load 100g was maintained.

Impact was evaluated by dropping five times at 1.2M height with the tip of the pen up, and then observing the pen's ink and backflow condition.

Ink and reversal were evaluated by leaving the pen under the condition of 50 ° C. for 1 month with the pen tip facing upward, and then observing whether the anti-reflective agent moved toward the pen tip.

Viscosity change was evaluated by measuring the viscosity of the backflow inhibitor sample again after 30 days. At this time, using a measuring viscometer (BROOKFIELD LVT, SPINDLE-No 4) was measured under RPM-6, measuring temperature-25 ℃ conditions.

The results are shown in Tables 2 to 3 as evaluation criteria according to Table 1.

○ △ × Followability Followed up with the outflow of ink. Spill of ink is normal, but inferior. Ink is deposited on the inner wall of the tube, and the followability is poor. Impact There is no scattering of the ink and no deformation of the backflow inhibitor is observed. There is no scattering of the ink, but deformation of the backflow inhibitor is observed. At the rear end of the tube, ink scattering is observed. Ink and reversing No reversal of the backflow inhibitor is observed. There is no reversal towards the tip of the pen, but deformation of the backflow inhibitor is observed at the ink and backflow interface. Reversal of the backflow inhibitors is observed. Viscosity change After 30 days from the initial viscosity value, the measured viscosity increased by only about 10%. After 30 days from the initial viscosity value, the measured viscosity is increased by 20% or more. After 30 days from the initial viscosity value, the measured viscosity is increased by 30% or more.

product High viscosity Midpoint Low viscosity * Common *
Ink used: GEL INK
Ball pen nib: 0.5 mm
Backflow Gel Color: white


Target viscosity 35,200 cps 18,400 cps 12,500 cps Transparent tube
Bore 4mm 2.8mm 2.4mm

Backflow Prevention Gel
Compounding cost

Polyalphaolefin: 50 wt%
Polbutene: 45 wt%
Functional silica: 5% by weight Polyalphaolefin: 60 wt%
Polbutene: 36 wt%
Functional Silica: 4 wt% Polyalphaolefin: 70 wt%
Polbutene: 26 wt%
Functional Silica: 4 wt%

Example 1 Comparative Example 1 Comparative Example 2 observe product Episode Milling time 100 minutes 40 minutes milling time 60 minutes milling time matters Black ink Blue ink Red ink Black ink Blue ink Red ink Black ink Blue ink Red ink Followability High viscosity Primary ○ ○ △ × × × △ △ △ Secondary ○ ○ ○ × × × △ △ △ 3rd △ ○ ○ × × × △ △ △ Midpoint Primary ○ ○ ○ △ × × △ △ △ Secondary ○ ○ ○ × × × △ △ △ 3rd ○ ○ ○ × × △ △ △ △ Low viscosity Primary ○ ○ ○ △ △ △ △ △ △ Secondary ○ ○ ○ × △ △ △ △ ○ 3rd ○ ○ ○ × △ △ ○ △ △ Impact Example 1 ○ △ ○ Example 2 ○ △ ○ Example 3 △ × △ Ink and reversing Example 1 ○ △ ○ Example 2 ○ △ ○ Example 3 ○ × △ Viscosity change Example 1 ○ × △ Example 2 ○ × △ Example 3 ○ × △

As described above, in Comparative Example 1 and Comparative Example 2 having a milling time of less than 100 minutes, most of the items were rejected for quality, which was not suitable for the production process and was not valuable as a product, and the milling time was the longest. In most cases, all items received the quality pass and were suitable for the production process and the product quality was excellent.

1: ballpoint pen nib
11: ball bearing
2: transparent connecting member
3: transparent tube
4: ink
5: Backflow Prevention Gel
6: rubber cap
1300: functional silica
1301: silica
1302: thermosensitive sheath
1302a: micropores
1303: functional material

Claims (7)

Preparing a reverse flow prevention gel by adding functional silica;
Coupling a ballpoint pen nib with a ball bearing therein to the front surface of the transparent connection member;
Coupling a transparent tube to a rear surface of the transparent connecting member;
Filling ink into the transparent tube;
Filling a backflow prevention gel including functional silica on a back surface of the ink filled in the transparent tube; And
And a rubber cap coupled to the front surface of the ball point pen nib;
The rubber cap is based on 100 parts by weight of natural rubber, p-p'-oxybisbenzenesulfonylhydrazide 23 to 27 parts by weight, polylactic acid 10 to 15 parts by weight, butyl acrylate 8 to 10 parts by weight, methyl meta 5 to 10 parts by weight of acrylate, 1 to 3 parts by weight of epoxide soybean oil,
The step of preparing the backflow prevention gel,
Preheating the tank to 60 ° C;
Preparing a base oil by adding polyolefin-based resin to the preheated tank and stirring at 6.5 rpm for 15 minutes;
1 to 10 parts by weight of the functional silica equipped with a temperature-sensitive coating to the prepared base oil was stirred for 15 minutes at 7 rpm for primary mixing;
Second mixing of the mixture, the mixture of which has been completed first, at 7 rpm for 30 minutes;
Putting the mixture in which the secondary mixing is completed into a mill and stirring while stirring at 7 rpm for 105 to 115 minutes;
Vacuum degassing with stirring at 7 rpm for 65 minutes to remove bubbles generated in the milled mixture; And
Method for producing a ballpoint pen refill comprising a backflow gel, characterized in that it comprises a packaging step. delete The method of claim 1,
Preparing the base oil,
50 to 80 parts by weight of polyalphaolefin, 10 to 50 parts by weight of polybutene, a method for producing a ballpoint pen refill comprising a backflow gel, characterized in that using a base oil. The method of claim 1,
The first mixing step,
Silica; A temperature sensitive coating attached to the surface of the silica and having a porous structure; And a functional material filled in the temperature-sensitive coated micropores, wherein the coating thickness is 15 to 30 μm. The method of claim 4, wherein
The temperature sensitive coating,
A method for producing a ballpoint pen refill comprising a backflow prevention gel, characterized in that when the ambient temperature is less than 18 ℃ the surface of the temperature-sensitive coating is condensed, the micropores are expanded to expose a portion of the surface of the functional material was filled. The method of claim 4, wherein
The functional material is a method for producing a ballpoint pen refill comprising a backflow prevention gel, characterized in that using a light-emitting carbon material and the diameter of the average particle is 0.5 ~ 3.0㎛. Ballpoint pen nibs with embedded ball bearings;
A rubber cap coupled to the front surface of the ball pen nib;
A transparent connection member coupled to the back of the ball pen nib;
A transparent tube coupled to a rear surface of the transparent connecting member;
An ink filled in the transparent tube; And
And a backflow prevention gel filled in the back surface of the ink and including functional silica.
The functional silica, the temperature sensitive coating consisting of a porous structure; And a photo-heating carbon material filled in the temperature sensitive coating micropores.

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