Environmentally friendly colored pencil

A color and pencil technology, applied in the field of stationery, can solve the problems of easy melting of pencil lead and waste of natural resources, and achieve the effect of improving hardness and coverage, no dross, and easy mass production

Inactive Publication Date: 2015-12-23
颍上县满天星文具用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Special attention should be paid to the preservation of the pencil lead, and the more common pen holders on the market are still made of wood or paper. If the pen is accidentally dropped into water during use or the pen is placed in a humid environment, the pencil lead will easily melt. It will be a phenomenon that the pencil lead is melted and damaged while the pen barrel is intact, which is a great waste of natural resources

Method used

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  • Environmentally friendly colored pencil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: prepare red pencil lead

[0018] Components: sodium thiosulfate 7g, sodium carbonate 0.565g, phenolphthalein 1.186g, carboxymethylcellulose (CMC) 1g.

[0019] Preparation method: mix phenolphthalein and sodium carbonate, add absolute ethanol dropwise to adjust to a thick paste, then pour molten sodium thiosulfate into it and stir evenly, then add carboxymethyl cellulose (CMC) and stir evenly, pour Put it in the mold, let it dry, take it out, and it's ready.

[0020] Effect: Using the Wolff-wilborn pencil hardness test method, the hardness of the pencil core is 5H, with high chroma and good coverage. Withstand temperature 45℃.

Embodiment 2

[0021] Embodiment 2: prepare red pencil lead

[0022] Components: sodium thiosulfate 7g, sodium carbonate 0.421g, phenolphthalein 0.883g, carboxymethylcellulose (CMC) 0.9g, clay 0.8g.

[0023] Preparation method: mix phenolphthalein and sodium carbonate, add absolute ethanol dropwise to adjust to a thick paste, then pour molten sodium thiosulfate into it and stir evenly, then add carboxymethyl cellulose (CMC) and clay and stir evenly , pour into the mold, let it dry, take it out, and that's it.

[0024] Effect: Using the Wolff-wilborn pencil hardness test method, the hardness of the pencil core is 4H, the chroma is very high, and the coverage is very good. Withstand temperature 45℃.

[0025] Effect: Using the Wolff-wilborn pencil hardness test method, the hardness of the pencil core is 4H, the chroma is very high, and the coverage is very good. Withstand temperature 45℃.

Embodiment 3

[0026] Embodiment 3: prepare yellow pencil lead

[0027] Components: sodium thiosulfate 7g, sodium carbonate 0.812g, m-nitrophenol 1.077g, carboxymethylcellulose (CMC) 1.5g.

[0028] Preparation method: mix m-nitrophenol and sodium carbonate, add absolute ethanol dropwise to adjust to a thick paste, then pour molten sodium thiosulfate into it and stir evenly, then add carboxymethyl cellulose (CMC) and stir Evenly, pour into the mold, let it dry, take it out, and that's it.

[0029] Effect: Using the Wolff-wilborn pencil hardness test method, the hardness of the pencil core is 3H, with high chroma and good coverage. Withstand temperature 45℃.

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Abstract

The invention discloses an environmentally friendly colored pencil. The pencil comprises a pencil holder and a pencil core, and is characterized in that the pencil holder is made of plant straws; a plastic film is arranged between the pencil holder and the pencil core; a pencil point sealing film is arranged at a pencil point of one end of the pencil. The pencil core comprises is prepared from the following components in parts by mass: 50 to 60 parts of sodium thiosulfate, 0 to 10 parts of clay, 13 to 20 parts of color developing agent, and 7 to 15 parts of carboxymethylcellulose (CMC). The environmentally friendly colored pencil has the advantages that the pencil core can be faded when meeting water or put in the air for a long time, the pencil core is easy to clean when being adhered to hands or clothes, no residue exists, all the components are poisonless and harmless, and the pencil is suitable for occasions not requiring stored for a long time, such as temporary tags, practices of scripts and paintings, and the like.

Description

technical field [0001] The invention belongs to the technical field of stationery, in particular to an environment-friendly colored pencil. Background technique [0002] In the prior art, ordinary pencil refills used for writing, drawing and painting are basically composed of graphite powder, which has disadvantages such as incomplete erasing, unsanitary, and difficult cleaning when it gets on hands, which is not good for the health of users; Existing colored pencil cores are made of complex raw materials and processes such as patent CN1302316A. The raw materials pollute the environment, and the written handwriting cannot automatically fade. [0003] In addition, colored pencil cores are mostly water-soluble substances. Special attention should be paid to the preservation of the pencil lead, and the more common pen holders on the market are still made of wood or paper. If the pen is accidentally dropped into water during use or the pen is placed in a humid environment, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
Inventor 曹斌
Owner 颍上县满天星文具用品有限公司
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