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Non-toxic dust-free chalk

A technology of chalk and gypsum powder, which is applied to pencil lead, household utensils, applications, etc. It can solve the problems of residue, unfriendly environment, dust pollution, etc., and achieve the effect of moderate hardness, fluent writing, and clear writing

Inactive Publication Date: 2018-01-09
广安市广安区化龙乡外经贸希望小学校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing chalk will have dust pollution problems during use, which is harmful to the health of users
Most of the existing non-toxic and dust-free chalks and dust-free colored chalks are improved traditional formulas, the handwriting cannot be automatically faded, and there are residues after erasing, which is not friendly to the environment
And various chemical substances are added in the existing chalk, which has certain toxicity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: a kind of nontoxic and dust-free chalk, its raw material counts 20 parts of gypsum powder, 15 parts of magnesium carbonate, 15 parts of titanium dioxide, 8 parts of activated clay, 5 parts of medical stone powder, 4 parts of plant pigments by weight of its raw material, 1 part of nano-graphene, 2 parts of borax, 3 parts of aloe vera gel, and the balance is water.

Embodiment 2

[0009] Embodiment 2: a kind of nontoxic and dust-free chalk, its raw material is counted as 15 parts of gypsum powder, 20 parts of magnesium carbonate, 20 parts of titanium dioxide, 5 parts of activated clay, 6 parts of medical stone powder, 5 parts of plant pigments by weight of its raw material, 2 parts of nano-graphene, 4 parts of borax, 1 part of aloe vera gel, and the balance is water.

Embodiment 3

[0010] Embodiment 3: a kind of nontoxic dust-free chalk, its raw material counts 25 parts by weight of gypsum powder, 10 parts of magnesium carbonate, 10 parts of titanium dioxide, 5 parts of activated clay, 3 parts of medical stone powder, 1 part of plant pigment, 0.5 parts of nano-graphene, 1 part of borax, 4 parts of aloe vera gel, and the balance is water.

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PUM

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Abstract

The invention relates to the technical field of teaching supplies, in particular to a non-toxic and dust-free chalk, the raw materials of which are calculated in parts by weight: 15-25 parts of gypsum powder, 10-20 parts of magnesium carbonate, 10-20 parts of titanium dioxide, and 5 parts of activated clay. ~10 parts, 3-6 parts of medical stone powder, 1-5 parts of plant pigment, 0.5-2 parts of nano-graphene, 1-4 parts of borax, 1-4 parts of aloe gel, and the balance is water. It has the characteristics of fluent writing, clear handwriting, moderate hardness, etc., and the dust is not easy to fly.

Description

technical field [0001] The invention relates to the technical field of teaching supplies, in particular to a non-toxic and dust-free chalk. Background technique [0002] The existing chalk will have the problem of dust pollution during use, which is unfavorable to the health of users. Most of the existing non-toxic and dust-free chalks and dust-free colored chalks are improved traditional formulas. The handwriting cannot be automatically removed, and there are residues after erasing, which is not friendly to the environment. And adding various chemical substances in the existing chalk has certain toxicity. Contents of the invention [0003] In order to solve the above problems, the invention provides an environmentally friendly, non-toxic, non-sticky and dust-free colored non-toxic and dust-free chalk. [0004] In order to achieve the above object, the present invention adopts a kind of nontoxic and dust-free chalk, whose raw materials are 15 to 25 parts of gypsum powder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
Inventor 段建东袁道川
Owner 广安市广安区化龙乡外经贸希望小学校
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