JPS6227439Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a writing instrument, more specifically, after writing on the writing surface such as paper or cloth using the writing part, it is applied over the handwriting to make it waterproof. This invention relates to a writing instrument in which a writing part is provided with an application part that stores a coating liquid that imparts properties, and by applying ink to the writing surface after writing, it is possible to obtain handwriting with excellent water resistance. .

(Prior art and its problems) Water-based inks have been widely used as inks for writing instruments due to their low toxicity and less bleed through of handwriting. However, it had a major problem in that when it got wet with water, the handwriting smeared and became unreadable, that is, the water resistance was weak. Attempts have been made to impart water resistance to water-based inks, but approaches based on ink composition have had their own limitations, such as problems with dye dissolution stability and increased ink viscosity.

(Means for solving the problem) Therefore, the purpose of this invention is not to rely only on the ink approach, but to mainly approach the structure.
It is an object of the present invention to provide a writing instrument which eliminates the above-mentioned conventional problems as much as possible. That is, the gist of the present invention is to provide a writing instrument that is equipped with a writing part that accommodates water-based ink containing a water-soluble dye, and an applicator part that accommodates a resin solution containing the water-soluble dye and a water-soluble resin capable of forming salts. That is.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Reference numeral 1 indicates a writing section 2 separated by an inner stopper 8.
A writing instrument consisting of an application part 9 and a writing part 2.
A water-based ink 4 stored in an ink storage body 3 such as a resin-coated synthetic fiber bundle is stored therein.

This water-based ink 4 is a water-based ink consisting of at least an acidic dye and/or a direct dye, a water-soluble organic solvent, and water, or a water-based ink consisting of at least a basic dye, a water-soluble organic solvent, and water. be.

A pen tip 5 made of felt, synthetic fiber bundle treated with resin, resin extrusion, resin sintered body, etc. is attached to the tip of the writing part 2.
6 is an air hole, and 7 is a round bar for promoting air circulation and preventing the ink storage body 3 from shifting.

The applicator 9 has a monofilament bundle or an applicator 10 made of the same material as the pen tip 5 of the writing unit 2 at its tip, and inside thereof,
A resin solution 11 is accommodated therein.

When the water-based ink 4 is an ink using an acid dye and/or a direct dye, this resin solution 11 is a resin solution consisting of at least a cationic water-soluble resin, a water-soluble organic solvent, and water; When the ink 4 is an ink using a basic dye, it is a resin solution consisting of at least an anionic water-soluble resin, a water-soluble organic solvent, and water.

Since the present invention has the above-mentioned configuration, when in use, the writing section is used to write on the surface to be written, and the resulting handwriting is coated with a resin solution using the application section, so that the dye and resin form salt. , it is possible to obtain handwriting with excellent water resistance, and it is of high practical value.

In the present invention, an ink occlusion body is arranged in the writing section and the ink is occluded in this ink occlusion body. It is also possible to occlude it in an occluding material and accommodate it in the applicator.Furthermore, as shown in FIG. Appropriate installation means can be adopted, such as providing a recess at the end of the applicator 9' and a protrusion at the end of the applicator 9', and integrating the two by fitting them together.

(Example) Hereinafter, specific examples of the water-based ink and resin solution in the present invention will be described in detail. In the examples, "parts" indicate "parts by weight."

Example 1 Γ Brilliant Blue FCF (CI42090, manufactured by Rakuto Chemical Industry Co., Ltd.) 6.0 parts Γ Sulfolane 10.0 parts Γ Ethylene glycol 10.0 parts Γ Water 74.0 parts The above components were mixed and heated to 40 to 50°C. By filling, an aqueous blue ink was obtained.

Γ Kayacrylic resin EC003 (quaternary ammonium type cationic resin, manufactured by Nippon Kayaku Co., Ltd.) 25.0 parts Γ Sulfolane 20.0 parts Γ Water 55.0 parts By mixing and stirring the above components, resin solution No. 1 was obtained. The above blue ink was filled into the writing part of a writing instrument as shown in the attached Figure 1, and this resin solution No. 1 was filled into the applied part to obtain a writing instrument.

Example 2 Γ Rhodamine 6GCP (CI45160, Sumitomo Chemical Co., Ltd.)
1.5 parts Γ Thiodiglycol 5.0 parts Γ n-methyl-2-pyrrolidone 20.0 parts Γ Water 73.5 parts A water-based red ink was obtained in the same manner as in Example 1 for each of the above components.

Γ Kayacrylic Resin H-900 (anionic resin, manufactured by Nippon Kayaku Co., Ltd.) 15.0 parts Γ Propylene glycol 5.0 parts Γ Water 80.0 parts The above components were mixed and stirred to obtain resin solution No. 2, The above red ink was filled into the writing part in the same manner as in Example 1, and this resin solution No. 2 was also filled into the application part to obtain a writing instrument.

(Effect of the invention) Regarding the writing implements obtained in Examples 1 and 2 above*
When a water resistance test was conducted, both Examples 1 and 2 had a water resistance of grade 5. As described above, according to the writing instrument of the present invention, the water resistance is significantly improved compared to the conventional writing instrument, and an excellent writing instrument can be provided.

*Water resistance test: Write the three letters "Writing Instrument" on a piece of high-quality paper, then apply the coating completely over the letters using the applicator, leave it for 5 minutes, soak the paper in water for 1 hour, and then This was determined visually after air drying. The criteria for evaluation are: 5th grade: unchanging, 4th grade: slightly flowing handwriting, 3
Grade: Handwriting is quite flowing but legible.
Grade 2: Handwriting remains but is illegible.
Grade 1: Handwriting completely disappears.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view, and FIG. 2 is a longitudinal sectional view of a main part of another embodiment. DESCRIPTION OF SYMBOLS 1... Writing instrument, 2... Writing part, 4... Water-based ink, 9... Coating part, 11... Resin solution.

Claims (1)

[Scope of utility model registration request] A writing instrument that includes a writing part that accommodates a water-based ink containing a water-soluble dye, and an applicator part that accommodates a resin solution containing the water-soluble dye and a water-soluble resin capable of forming salts.