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Whiteboard color chalk capable of fading
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A technology of colored chalk and whiteboard, applied in applications, pencil leads, household utensils, etc., can solve the problems of hard to erase and hard to fade handwriting, and achieve the effect of no stimulation, smooth writing and clear writing
Inactive Publication Date: 2015-03-18
杜纪群
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Summary
Abstract
Description
Claims
Application Information
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Problems solved by technology
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Problems solved by technology
A variety of new types of chalk appearing at present, although the colors are diverse and easy to write, the handwriting is not easy to fade and difficult to erase
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0013] Embodiment 1, the preparation of blue chalk:
[0014] Weigh 0.6 grams of methyl blue red, add 1.0 grams of glycerin, stir and wet, add 8.36 grams of emulsifying wax, heat to 90 ° C, stir to completely melt, then gradually add 1.34 grams of polyethylene glycol, 3.0 grams of talc, 0.3 grams Sodium polyacrylate, melted separately, stirred evenly, and finally added 4.18 grams of stearic acid and 0.5 grams of white carbon black and stirred evenly. After cooling a little, pour it into the mold, and take out the sample after it is completely cooled and set.
Embodiment 2
[0015] The preparation of embodiment 2, red chalk:
[0016] Weigh 0.4 grams of acid fuchsin, add 1.0 grams of glycerin, stir and wet, add 8.40 grams of emulsifying wax, heat to 90 ° C, stir to completely melt, then gradually add 1.40 grams of polyethylene glycol, 3.0 grams of talc, 0.3 grams of poly Sodiumacrylate, melted separately, stirred evenly, and finally added 4.20 grams of stearic acid and 0.5 grams of white carbon black and stirred evenly. After cooling a little, pour it into the mold, and take out the sample after it is completely cooled and set.
Embodiment 3
[0017] The preparation of embodiment 3, green chalk:
[0018] Weigh 0.4 grams of acid No. 3 green, add 1.0 grams of glycerin and stir to wet, add 8.36 grams of emulsifying wax, heat to 90°C, stir to melt completely, then gradually add 1.34 grams of polyethylene glycol, 3.0 grams of talc, 0.3 g of sodium polyacrylate, respectively, melted, stirred evenly, and finally added 4.18 g of stearic acid and 0.5 g of white carbon black and stirred evenly. After cooling a little, pour it into the mold, and take out the sample after it is completely cooled and set.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM
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Abstract
The present invention provides a whiteboard color chalk capable of fading, and a preparation method thereof, wherein the raw materials of the whiteboard color chalk comprise, by mass, 40-45% of emulsified wax, 20-25% of stearic acid, 14-18% of talcpowder, 6-10% of polyethylene glycol, 1-2% of sodium polyacrylate, 2-4% of a coloring agent, 5-6% of glycerin, and 0.6-0.8% of white carbon black, wherein the coloring agent is one or a plurality of materials selected from methyl blue, acid fuchsin and acid green 3#. According to the present invention, the preparation method is simple, and the prepared color chalk has characteristics of smooth writing and clear writing on the whiteboard, fading and no trace after erasure with the erasure agent, no stimulating effect on the skin, and green environmental protection.
Description
technical field [0001] The present invention relates to writing implements, in particular to a fadeable colored chalk for whiteboards. Background technique [0002] In modern teaching, although water-soluble chalk and whiteboard pens have replaced traditional chalk to a certain extent, their development is not very smooth. The non-degradability of some pigments and the use of a large amount of organic solvents in inks have certain hazards to the environment and human health. A variety of new types of chalk appearing at present have various colors and are easy to write, but their handwriting is not easy to fade and difficult to erase. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a kind of fadeable colored chalk for whiteboard, which can write smoothly on the whiteboard, the handwriting is clear, and the color can be faded by erasing with an eraser, and it has no irritating effect on the skin, and is green and environmentally friendly....
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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