Fragrant coloured chalk without dust

A color and chalk technology, applied in pencil lead, household utensils, applications, etc., can solve the problems of no fragrance, harmful to human health, and poor writing, and achieve the effect of less dust and smooth writing

Inactive Publication Date: 2006-07-05
薛玮翔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The chalks used now have a lot of dust, which is harmful to human health, and the writing is not fluent and has no fragrance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Below in conjunction with fragrance colored dust-free chalk of the present invention is described in further detail:

[0014] Grind 100 grams of calcium sulfate and 100 grams of calcium carbonate, pass through an 80-mesh sieve, and mix, then add 200 grams of water to the mixed powder, add 0.6 grams of pigment and 0.4 grams of essence, mix thoroughly and set aside.

[0015] The above-mentioned mixture is sent to a screw extruder coated with kerosene in advance for extrusion. The inner diameter of the horizontal hole is about 10 mm. The extruded chalk is cut off according to the required length and dried. The drying can be carried out in a high-temperature drying box or Dry naturally in the air.

[0016] The dried chalk is immersed in an aqueous solution prepared with 0.9-1.0 parts of polyvinyl alcohol, and then dried.

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PUM

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Abstract

This invention describes a fragrant, colored dustless chalk, composed of: 100 portions of calcium sulfate, 100 portions of calcium carbonate, 0.9-1.0 portions of pigment, 0.1-1.0 portions of essence, 150-200 portions of water, and an appropriate amount of lamp oil. The fragrant, colored dustless chalk in this invention makes writing more smoothly with few dusts.

Description

technical field [0001] The present invention relates to chalk, especially a kind of colored dust-free chalk with fragrance. Background technique [0002] The chalk dust that is used now is more, harmful to human health, and writing is not fluent, has no fragrance. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a scented colored dust-free chalk that makes writing more fluent and smooth, and has very little dust. [0004] In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a kind of scented colored dust-free chalk, comprising the following ingredients: [0005] Calcium sulfate: 100 parts [0006] Calcium carbonate: 100 parts [0007] Polyvinyl alcohol: 0.9 to 1.0 parts [0008] Pigment: 0.5~1.0 parts [0009] Flavor: 0.1~1.0 parts [0010] Water: 150-200 parts [0011] Kerosene: Appropriate amount. [0012] The fragrance-colored dust-free ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
Inventor 薛玮翔
Owner 薛玮翔
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