Green, environment-friendly and dust-free chalk
A green, environmentally friendly, chalk technology, used in pencil leads, household appliances, applications, etc., can solve problems such as non-discovery and health effects, and achieve the effect of clear handwriting, less dust, and less dust flying.
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Embodiment 1
[0013] The green environmental protection dust-free chalk of the present invention is characterized in that: by weight, the material formula is: 15-20 parts of plaster of paris powder, 15-20 parts of large white powder, 15-20 parts of water; 3-5 parts of color paste, all The color paste is an aqueous solution consisting of 2-5 parts of polyvinyl acetate emulsion, 2-3 parts of polyvinyl alcohol and 50 parts of water.
Embodiment 2
[0015] The preparation method of the green environmental protection dust-free chalk of the present invention is characterized in that: by weight, after mixing 15-20 parts of plaster powder and 15-20 parts of large white powder, add 15-20 parts of water and stir evenly; add color paste 3-20 parts 5 parts, after being evenly stirred, extruded and dried to obtain the green environmental protection dust-free chalk of the present invention.
[0016] The green, environment-friendly and dust-free chalk of the present invention has the characteristics of fluent writing, clear handwriting, moderate hardness, little dust and is not easy to fly, and the like.
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Abstract
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Application Information
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