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Sintered colored pencil lead

A pencil lead, color technology, applied in pencil lead, non-moving pencil, printing, etc., can solve the problem of low erasability of handwriting, and achieve the effect of excellent erasability and smooth writing.

Pending Publication Date: 2022-05-10
PILOT PEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this colored pencil lead to write on paper, the ink impregnated in the pores penetrates into the fibers of the paper, whereby coloring components such as dyes penetrate into the inside of the paper. Therefore, when erasing the color with an eraser When writing with a pencil lead, the erasability of the handwriting may become lower

Method used

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  • Sintered colored pencil lead
  • Sintered colored pencil lead
  • Sintered colored pencil lead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] [Kneading process, extrusion process, and firing process]

[0131]

[0132]

[0133] The above complex was evaporated with a kneader and three rolls, heated and kneaded, and the obtained kneaded product was extruded into a predetermined diameter to obtain a linear molded product. The linear molded product was heated up to 600°C at a temperature increase rate of 10°C / hour in argon gas, and kept for 5 hours, then heated at 100°C / hr in an oxygen atmosphere, and fired at 900°C for 1 hour. A porous substrate having a porosity of 25% and a cross-sectional diameter of 0.55 mm was obtained.

[0134] [Impregnation process]

[0135] 70 parts by mass of ethanol

[0136] 30 parts by mass of yellow common dye

[0137] (Salt-forming dye of basic dye and organic acid, manufactured by Hodogaya Chemical Industry Co., Ltd., trade name: AizenSpilon Yellow C-GNH)

[0138] The above complex was stirred at 60°C until uniformly mixed to obtain a colorant solution (1).

[0139]The p...

Embodiment 2～17

[0146] Colored pencil leads were obtained in the same manner as in Example 1 except that the colorant solution (1) or the low-volatile liquid (1) was changed to the liquids described in Table 1.

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Abstract

The invention provides a color pencil lead which is excellent in handwriting erasing performance, smooth in writing feeling and excellent in physical strength. The color pencil lead comprises a porous core body and a non-volatile liquid filled in pores of the porous core body, wherein the porous core body comprises a host material, an inorganic binding material and a solid colorant.

Description

technical field [0001] The present invention relates to colored pencil leads. More specifically, it relates to a colored pencil lead having excellent color rendering properties and erasability, smooth writing feeling, and high physical strength. Background technique [0002] At present, colored pencil leads used in mechanical pencils etc. use pencil leads with the following structure. The main components are main materials such as boron nitride and binder materials such as clay, and a kneaded product containing organic polymer compounds and the like is extruded as necessary. Then, the ink containing the dye is impregnated into the pores of the white porous substrate obtained by firing at a high temperature. When using this colored pencil lead to write on paper, the ink impregnated in the pores penetrates into the fibers of the paper, whereby coloring components such as dyes penetrate into the inside of the paper. Therefore, when erasing the color with an eraser When writin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K19/02B43K19/18C09D13/00
CPCB43K19/02B43K19/18C09D13/00
Inventor 神林宏信乾太郎
Owner PILOT PEN CO LTD
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