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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 dust flying and ineffective effect, and achieve the effect of less dust flying, simple manufacturing method and low production cost

Inactive Publication Date: 2019-06-04
南宁市远才教育咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the problem of flying dust, people have never stopped exploring the dust-free chalk. Although the dust of the existing dust-free chalk is reduced after wiping, the effect is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A dust-free chalk, mainly prepared from the following components by weight:

[0014] 15 parts of gypsum powder, 15 parts of calcium carbonate, 5 parts of talc powder, 5 parts of sodium metasilicate nonahydrate, 5 parts of white or color pigments, 10 parts of ethanol, 5 parts of polyvinyl alcohol, 30 parts of water;

[0015] The above-mentioned preparation method of dust-free chalk includes the following steps: firstly, dissolve sodium metasilicate nonahydrate, ethanol, and polyvinyl alcohol in water and stir evenly; secondly, add gypsum powder, calcium carbonate, talc, white or colored The pigment is stirred evenly; finally, it is cast into a shape and dried to obtain a dust-free chalk product.

Embodiment 2

[0017] A dust-free chalk, mainly prepared from the following components by weight:

[0018] 30 parts of gypsum powder, 30 parts of calcium carbonate, 10 parts of talc powder, 10 parts of sodium metasilicate nonahydrate, 10 parts of white or color pigments, 15 parts of ethanol, 10 parts of polyvinyl alcohol, and 50 parts of water;

[0019] The above-mentioned preparation method of dust-free chalk includes the following steps: firstly, dissolve sodium metasilicate nonahydrate, ethanol, and polyvinyl alcohol in water and stir evenly; secondly, add gypsum powder, calcium carbonate, talc, white or colored The pigment is stirred evenly; finally, it is cast into a shape and dried to obtain a dust-free chalk product.

Embodiment 3

[0021] A dust-free chalk, mainly prepared from the following components by weight:

[0022] 20 parts of gypsum powder, 20 parts of calcium carbonate, 8 parts of talc powder, 7 parts of sodium metasilicate nonahydrate, 8 parts of white or color pigments, 12 parts of ethanol, 8 parts of polyvinyl alcohol, 40 parts of water;

[0023] The above-mentioned preparation method of dust-free chalk includes the following steps: firstly, dissolve sodium metasilicate nonahydrate, ethanol, and polyvinyl alcohol in water and stir evenly; secondly, add gypsum powder, calcium carbonate, talc, white or colored The pigment is stirred evenly; finally, it is cast into a shape and dried to obtain a dust-free chalk product.

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Abstract

The invention discloses a dust-free chalk, which is mainly prepared from the following components by weight: 15-30 parts of gypsum powder, 15-30 parts of calcium carbonate, 5-10 parts of talc powder,5-10 parts of sodium metasilicate nonahydrate, 5-10 parts of a white or color pigment, 10-15 parts of ethanol, 5-10 parts of polyvinyl alcohol, and 30-50 parts of water. The preparation method comprises: dissolving sodium metasilicate nonahydrate, ethanol and polyvinyl alcohol in water, and uniformly stirring; adding gypsum powder, calcium carbonate, talc powder and a white or color pigment, and uniformly stirring; and carrying out cast molding, and drying to obtain the dust-free chalk. According to the present invention, during the writing and wiping, the dust flying is extremely less so as to achieve environmental protection; and the sources of the raw materials are wide, the production cost is low, and the production method is simple.

Description

Technical field [0001] The invention relates to a dust-free chalk. Background technique [0002] When teachers are teaching, they often write and wipe on the blackboard non-stop, often making dusty, posing a serious threat to the health of teachers and students. In order to overcome the problem of flying dust, people have never stopped exploring the dust-free chalk. The existing dust-free chalk reduces the dust after wiping, but the effect is not obvious. Summary of the invention [0003] The purpose of the present invention is to solve the deficiencies of the prior art to provide a dust-free chalk, so that the user will not be contaminated by the chalk during use, and no dust will be left in the place where the chalk is placed. [0004] In order to achieve the above objectives, the present invention adopts the following technical solutions: [0005] A dust-free chalk, mainly prepared from the following components by weight: [0006] 15-30 parts of gypsum powder, 15-30 parts of calci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
Inventor 丘志远
Owner 南宁市远才教育咨询有限公司
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