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Low-dust clean pencil lead and preparation method thereof

A pencil lead and dust technology, which is applied in the direction of pencil lead, non-active pencil, printing, etc., can solve the problems of high risk and harm, and achieve the effect of small dust generation, simple process flow and reasonable ratio of raw materials

Inactive Publication Date: 2015-12-16
蚌埠神龙笔业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"6b" is the softest, with the darkest writing. It is often used for drawing. The label of ordinary pencils is generally "hb". It is relatively dry, and in daily use, a large amount of dust will be produced. Although the dust itself is not very toxic, if the dust is inhaled by the user, it will cause certain harm, especially for elementary school students who have just started school. bigger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take by weighing graphite 50kg, clay 15kg, mutton oil 5kg, guar gum 8kg, sodium thiosulfate 5kg, developer 6kg;

[0016] The color developer is prepared by configuring citric acid and hydrogen peroxide at a ratio of 1:1.5.

[0017] The preparation method is as follows: weigh the raw materials according to the amount of raw materials, mix sheep oil, guar gum and sodium thiosulfate, and then stir to form a paste, add clay and graphite powder in the raw materials, and mix well , then mix the developer into the mixture and stir evenly, pour it into the mold, let it dry, and then take it out.

Embodiment 2

[0019] Weigh 55 parts of graphite, 20 parts of clay, 5 parts of lard, 5 parts of tallow, 10 parts of flax gum, 7 parts of sodium thiosulfate, and 8 parts of color developer;

[0020] The color developer is prepared by configuring citric acid and hydrogen peroxide at a ratio of 1:1.5.

[0021] The preparation method is as follows: weigh each raw material according to the amount of raw materials, mix lard, tallow, flax gum and sodium thiosulfate, then stir to form a paste, add clay and graphite powder in the raw materials, and mix thoroughly After uniformity, mix the developer into the mixture and stir evenly, pour it into the mold, let it dry, and then take it out.

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PUM

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Abstract

The invention relates to the technical field of production of school supplies, in particular to a low-dust clean pencil lead, comprising 50-60 parts of graphite, 15-25 parts of clay, 5-15 parts of animal fat, 8-12 parts of original plant gum, 5-8 parts of sodium thiosulfate, and 6-10 parts of a color developing agent. The low-dust clean pencil lead has the advantages that a technical process is simple, the ratio of materials is reasonable, the addition of the fat into the materials increases product viscosity and firmness and is friendly to original writing, no dust is generated, physical harm caused by inhaling dust is maximally avoided, the application effect is significant, and this lead is convenient to popularize and use.

Description

technical field [0001] The invention relates to the technical field of school supplies preparation, in particular to a low-dust clean pencil lead and a preparation method thereof. Background technique [0002] Pencil is the main utensil used for art painting and drawing, and it is also one of the commonly used learning utensils for students. Pencil is mainly composed of pencil shaft and pencil lead, and the main component of pencil lead is graphite. In fact, the refill of a pencil is made by mixing graphite and clay in a certain proportion. For example, "h" is the English prefix of "hard" (hard), which stands for clay and is used to indicate the hardness of the pencil lead. The larger the number in front of "h" (such as 6h), the harder the pencil refill is, that is, the larger the proportion of clay mixed with graphite in the refill, the less obvious the written characters are, and it is often used for rewriting. "b" is the prefix of "black" (black) in English, which stand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00B43K19/18
Inventor 朱建青朱凯
Owner 蚌埠神龙笔业有限公司
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