Preparation method of high-elastic and environment-friendly crayon

Abstract

The invention relates to a preparation method of a high-elastic and environment-friendly crayon. The preparation method comprises the following steps of (1) weighing the raw materials according to the ratio of the components, mixing white or colorless solid powder and stearic acid, and uniformly grinding for further use; (2) adding emulsifying wax into a flask, enabling a magnetic stirrer to heat and stir, and melting the emulsifying wax, until the emulsifying wax is fully melted; (3) adding macromolecular polymer into the melted emulsifying wax, and continuing to stir, until the macromolecular polymer is completely melted; (4) adding the powder in step (1), a color developing agent and an adhesive into the step (3), continuously performing stirring until the powder, the color developing agent and the adhesive are completely dissolved into the uniform opacifying form, and adding a color developing additive in the stirring process until the color is completely developed and the stirring is uniform; (5) adding the materials into a die of a vacuum injection molding machine, and performing forming, so as to form a cylindrical product; performing cutting as required after cooling, so as to obtain the high-elastic and environment-friendly crayon.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a preparation method of a high-elastic environmental protection crayon. Background technique [0002] A crayon is a tool for writing calligraphy and painting. It disperses the pigment in a solid or (and) liquid medium, and adheres to the surface of the solid material evenly and meticulously with the help of the medium. It can have dozens of colors; but the crayon does not have Permeability is fixed on the screen by adhesion; crayons are mainly used by children, so their main defect is that the carcinogens such as aromatic hydrocarbons produced by raw materials exceed the standard, which is harmful to children's health; Once bent during use, it will be broken, which is not conducive to children's use; in order to overcome the above defects, some water-soluble crayons have been released on the market, such as the Chinese invention patent document (application number: 200...

AI Technical Summary

Problems solved by technology

[0002] A crayon is a tool for writing calligraphy and painting. It disperses the pigment in a solid or (and) liquid medium, and adheres to the surface of the solid material evenly and meticulously with the help of the medium. It can have dozens of colors; but the crayon does not have Permeability is fixed on the screen by adhesion; crayons are mainly used by children, so their main defect is that the carcinogens such as aromatic hydrocarbons produced by raw materials exceed the standard, which is harmful to children's health; Once bent during use, it will be broken, which is not conducive to children's use; in order to overcome the above defects, some water-soluble crayons have been released on the market, such as the Chinese invention patent document (application number: 200910189491. Composed of paraffin wax, water-soluble wax, filler, and coloring agent, the composition and mass percentage of the main raw materials of the washable crayon of the present invention are: paraffin wax 51.5-79.5%, water-soluble wax 10-20%, filler 10-30%, Colorant 0.2-1.5%

But the crayons of this technical solution are easily broken