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Production method for nontoxic water-soluble chalk

A production method and technology of water-soluble starch, applied in the direction of pencil lead, household utensils, applications, etc., to achieve the effect of simple raw materials

Inactive Publication Date: 2018-08-17
陈风淇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most schools are using traditional chalk for teaching. The main components of traditional chalk are calcium carbonate, calcium sulfate, calcium oxide, and other small amounts of ingredients. Using traditional chalk, a large amount of chalk dust is diffused in the air when wiping. In recent years To carry out process improvement, but it has not fundamentally changed a lot of dust during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: a kind of preparation method of nontoxic water-soluble chalk, comprises the following steps:

[0014] a select water-soluble starch, and after the water-soluble starch is screened through a sieve with a mesh number of 100, adding hot water at a temperature of 20-40°C for stirring to form starch glue;

[0015] b Select gypsum powder, titanium dioxide, fatty alcohol polyoxyethylene ether, and borax to mix evenly, add water and stir to make a slurry;

[0016] c. Add starch glue into the prepared slurry, stir evenly, pour into mold, extrude and dry.

[0017] The raw materials are calculated by weight: 3 parts of starch glue, 30 parts of gypsum powder, 11 parts of titanium dioxide, 9 parts of fatty alcohol polyoxyethylene ether, 20 parts of borax, and the rest is water.

Embodiment 2

[0018] Embodiment 2: a kind of preparation method of nontoxic water-soluble color chalk, comprises the following steps:

[0019] a select water-soluble starch, and after the water-soluble starch is screened through a sieve with a mesh number of 100, adding hot water at a temperature of 20-40°C for stirring to form starch glue;

[0020] b Select gypsum powder, titanium dioxide, fatty alcohol polyoxyethylene ether, and borax to mix evenly, add water and stir to make a slurry;

[0021] Add plant pigment in the slurry described in c;

[0022] d Add starch glue into the prepared slurry, stir evenly, pour into a mold, extrude, and dry.

[0023] The raw materials for making colored chalk are calculated by weight: 3 parts of starch glue, 25 parts of gypsum powder, 15 parts of titanium dioxide, 10 parts of fatty alcohol polyoxyethylene ether, 18 parts of borax, 9 parts of plant pigment, and the rest is water.

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PUM

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Abstract

The invention discloses a production method for an environment-friendly, non-toxic and dust-less water-soluble chalk. The production method comprises the following steps: (a) water-soluble starch is chosen, and the water-soluble starch is screened by a screen with 100 meshes, then added into hot water with the temperature of 20 DEG C to 40 DEG C and stirred, so that starch glue is formed; (b) gypsum powder, titanium dioxide, fatty alcohol polyoxyethylene ether and borax are chosen to be uniformly mixed, then added with water and stirred, so that slurry is prepared; (c) after the starch glue isadded into the prepared slurry and uniformly stirred, the mixture is poured into a mold for being subjected to extrusion forming and drying, thereby the nontoxic water-soluble chalk is obtained.

Description

technical field [0001] The invention relates to a teaching article, in particular to a method for making non-toxic water-soluble chalk. Background technique [0002] At present, most schools are using traditional chalk for teaching. The main components of traditional chalk are calcium carbonate, calcium sulfate, calcium oxide, and other small amounts of ingredients. Using traditional chalk, a large amount of chalk dust is diffused in the air when wiping. In recent years To improve the process, but it has not fundamentally changed the large amount of dust that will be scattered during use. These dusts directly affect the health of teachers and students. After a large amount of inhalation, they will produce cumulative toxicity in the human body, causing diseases such as respiratory tract and lungs, and become a health killer for teachers and students. Contents of the invention [0003] Aiming at the above problems, the present invention provides a method for making water-so...

Claims

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Application Information

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IPC IPC(8): C09D13/00
CPCC09D13/00
Inventor 陈风淇
Owner 陈风淇
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