Dust-free chalk with smoothness in writing and preparation method thereof

Abstract

The invention discloses a dust-free chalk with smoothness in writing and a preparation method thereof. The dust-free chalk is prepared from the following raw materials in parts by weight: 5.6 to 8.1 parts of dimethyl ether, 12.8 to 16.4 parts of vegetable oil, 13.1 to 16.3 parts of heavy calcium carbonate, 0.6 to 1.4 parts of pigment, 3.6 to 5.5 parts of beewax, 2.3 to 3.6 parts of lauryl sodium sulfate, 8.8 to 10.5 parts of lignocellulose, 10.5 to 15.2 parts of isopropyl alcohol, 6 to 7.5 parts of kieselguhr and 4 to 7.5 parts of lemongrass herb. According to the dust-free chalk disclosed bythe invention, the lemongrass herb is extracted to obtain a lemongrass herb extracting solution, the lemongrass herb extracting solution is utilized to modify the lignocellulose and the kieselguhr toenhance surface combining capacity of the lignocellulose and the kieselguhr, and the lignocellulose and the kieselguhr are matched with a first mixture and a third mixture to be used after being treated by an electric field; thus, better adhesive property is achieved, the ratio of the volume of chalk dust are improved, the scaling-off phenomenon is avoided, slippage in writing is avoided, and writing is clear.

Description

technical field [0001] The invention relates to a teaching article, in particular to a dust-free chalk with smooth writing. Background technique [0002] As people pay more attention to education, more and more children can go to school to study. School refers to an organization where educators carry out systematic educational activities for educated people in a planned and organized manner. Schools include kindergartens, primary schools, junior high schools, high schools and universities. Students receive teaching in schools. [0003] Teaching is a human-specific talent cultivation activity composed of teachers' teaching and students' learning. Through such activities, teachers guide students to learn and master cultural and scientific knowledge and skills purposefully, in a planned and organized manner, and promote the improvement of students' quality, so that they can become the people needed by society. [0004] Teaching supplies need to be used in teaching, and chalk ...

AI Technical Summary

Problems solved by technology

Chalk includes ordinary chalk and dust-free chalk. Ordinary chalk has a crisp texture, is easy to break and break, and particles scatter during use, causing air pollution and affecting the health of users; though dust-free chalk increases the proportion and volume of chalk dust, thereby It is not easy to fly, but it is easy to slip when used, such as the patent with the notification number CN 102618123A, the writing fluency is not good