Biochemical chalk and preparation method thereof

Abstract

A biochemical chalk and a preparation method thereof belong to the field of environment-protection articles of culture and education. The biochemical chalk is prepared by the following main materials according to weight percentage: 52 to 56 percent of base material, 2 to 4 percent of zeolite powder, 2 to 4 percent of ledikite powder, 33 to 38 percent of titanium pigment and 1 to 3 percent of glycerin, wherein the base material comprises the following components according to mass percentage: 15 to 20 percent of surface active agent, 7 to 9 percent of essential oil, 1 to 2 percent of edible oil, 50 to 55 percent of paraffin, 1 to 2 percent of alcohol and 16 to 22 percent of vegetable palm oil. The preparation method comprises the steps of: preparing the base material by stirring and heating according to the components of the base material and weight percentage; preparing the materials of the biochemical chalk by stirring and heating according to the components of the materials and weight percentages; and finally injecting the materials into a steel mould, pressing, cooling and cutting the materials to obtain the finished product. When in use, the biochemical chalk avoids powder generation; and the handwriting can be cleaned by a wet cloth; the writing with the biochemical chalk is smooth and the clear. The biochemical chalk is prepared by easy-available and environment friendly materials and has simple preparation process and low preparation cost.

Description

technical field [0001] The invention relates to a biochemical chalk and a production method thereof, belonging to the technical field of environmental protection cultural and educational supplies. Background technique [0002] The micro-ions of traditional chalk dust have a strong ability to adsorb germs, and chalk dust contains heavy metals such as cadmium, lead, and manganese. These harmful bacteria and heavy metal components such as cadmium, lead, and manganese are likely to cause inflammation to the respiratory system, skin, ear, nose and throat of teachers and students. Among the ingredients contained in many chalks currently used in schools, except for the slightly low content of lead and manganese, the content of heavy metal cadmium is relatively high. Once cadmium is inhaled into the human body, it is mainly stored in tissues such as liver, kidney, and bone. The damage is obvious. The main lesions caused by long-term exposure to cadmium compounds are emphysema and l...

AI Technical Summary

Problems solved by technology

However, liquid chalk requires a special black (green) board, or a special film is pasted on the surface of the existing blackboard or green board, and the blackboard needs to be transformed, and after writing, the chalk liquid will quickly become shallow after volatilization. Unclear blackboard content

Due to the structural design of liquid chalk, problems such as poor supply of pen liquid during the writing process often affect normal teaching