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Environment-friendly dustless biochemical chalk and making method thereof

A kind of chalk and biochemical technology, applied in pencil lead, household utensils, applications, etc., can solve the problems of easy breakage and breakage, dust pollution, heart and lung function decline, etc., and achieve fine and flexible texture, not easy to break and break, and bright color Effect

Inactive Publication Date: 2010-09-15
金松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ①. The texture is crisp, easy to break and break, which affects writing and causes a lot of waste
[0004] ②. Due to the decision of the product model, the remaining part (chalk head) cannot be used, resulting in waste
[0005] ③. The chalk is damp or the blackboard surface is wet and the writing is not clear, so it cannot be used
[0006] ④. The most important point is the serious dust pollution, which affects the health of teachers and students
And harmful substances flow into the blood vessels, which will cause the decline of heart and lung function, cause various diseases, and seriously damage the health of teachers and students.
[0008] At present, although there are various so-called "dust-free chalks" in my country's teaching supplies market, they cannot achieve the "dust-free" effect at all because the composition ratio has not changed substantially.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 15g of calcium carbonate, 11g of castor oil, 7.5g of soybean oil, 5.5g of coconut oil, 15g of stearic acid, 5g of magnesium carbonate, and 3.5g of paraffin wax, and then put them in a hot melt mixer at 1600 rpm for 11 hours. The operating temperature is 350 degrees Celsius to make the main material; after mixing the obtained main material with 35g of titanium dioxide and 2.5g of glycerin, it is put into the hot melt mixer again at 2600 rpm for 1 hour, and the operating temperature is 100 Celsius, the raw material is made; the raw material in the mixer is injected into the chalk forming mold, and the forming mold is cooled to solidify the raw material in the mold, and the finished product is obtained after demolding.

[0019] The obtained dust-free biochemical chalk has the characteristics of fluent writing, clear handwriting, not easy to fade, bright color, high hardness, and not easy to break. The writer's fingers, face, and clothing are free from dust contamination. T...

Embodiment 2

[0021] Mix 16g calcium carbonate, 10g castor oil, 8g soybean oil, 5g coconut oil, 15.5g sodium lauryl sulfonate, 4.5g magnesium carbonate, 3.6g paraffin wax, and then put them in a hot melt mixer at 2000 rpm, stirring 12 hours, the operating temperature is 360 degrees Celsius, make the main material; after mixing the obtained main material with 37g of titanium dioxide and 2g of glycerin, put it into the hot melt mixer again at 2800 rpm, stirring for 1.5 hours, operation The temperature is 105 degrees Celsius to make raw materials; the raw materials in the blender are injected into the chalk forming mold, and the raw materials in the mold are cooled by cooling the forming mold, and the finished product is obtained after demolding.

[0022] The obtained dust-free biochemical chalk has the characteristics of fluent writing, clear handwriting, not easy to fade, bright color, high hardness, and not easy to break. The writer's fingers, face, and clothing are free from dust contamination...

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PUM

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Abstract

The invention relates to an environment-friendly dustless biochemical chalk and a making method thereof. The environment-friendly dustless biochemical chalk is made of main materials and auxiliary materials, wherein the main materials comprise the following components in parts by weight: 10-20 parts of calcium carbonate, 9-13 parts of castor oil, 6.5-8.5 parts of bean oil, 5-6 parts of coconut oil, 14-16 parts of surfactant, 4.5-5.5 parts of magnesium carbonate and 3.2-3.8 parts of paraffin; and the auxiliary materials comprise the following components in parts by weight: 25-45 parts of titanium pigment powder, 2-3 parts of glycerol and 0-3 parts of pigment. The obtained dustless biochemical chalk has fine and flexible quality, smooth writing and bright color and is not easily broken, furthermore, the product has clear characters and easy identification no matter the product is dry or wet and is written on a blackboard, a glass or the surface of any substance, and most important of all, no dust occurs in the writing and erasing processes.

Description

Technical field [0001] The invention relates to an environment-friendly dust-free biochemical chalk and a manufacturing method thereof. Background technique [0002] Chalk is an important writing tool to demonstrate and convey teaching content in blackboard writing. Although it took a long time, it is still used in all primary and secondary schools and some university teaching activities. Traditional chalk is made of plaster, lime and other auxiliary materials. Although it has the characteristics of smooth, clear writing and easy to wipe, it also has shortcomings and deficiencies that can never be remedied. Mainly as follows: [0003] ①. Crisp texture, easy to break and break, affect writing and cause a lot of waste. [0004] ②. Due to the product model, the remaining part (chalk head) cannot be used, resulting in waste. [0005] ③. The chalk is damp or the surface of the blackboard is damp and the writing is not clear and cannot be used. [0006] ④. The most important point is tha...

Claims

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Application Information

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IPC IPC(8): C09D13/00
Inventor 金松
Owner 金松