Dust free chalk and preparation process thereof

A chalk and talc technology, applied in pencil leads, household appliances, applications, etc., can solve the problems of dust pollution, unhealthy users, easy powder falling when writing and wiping, and achieve the effect of not easy powder falling and good bonding force.

CN1450128AInactive Publication Date: 2003-10-22王力
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2003-10-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a dust-free health chalk. It is made up by using water-soluble wax, glycerine and titanium pigment, talcum powder and water through the processes of mixing raw materials, casting and drying.
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Description

Technical field

[0001] The invention relates to a chalk for teaching and a manufacturing process thereof. Background technique

[0002] At present, chalk and fine-dust chalk widely used in the teaching field are easy to be stained with dust on hands during use, and are easy to fall off when writing and wiping, causing dust pollution and causing adverse health effects on users. Contents of the invention

[0003] The object of the present invention is to provide a kind of dust-free chalk that does not stick to hands and has no dust.

[0004] The purpose of the present invention is to realize the purpose of the invention: use water-soluble wax and glycerin as binder and modifier to improve the bonding force between powder particles, and mix it with titanium dioxide, talcum powder and water and then cast and dry it Become chalk, its proportioning is as follows (weight ratio):

[0005] Titanium dioxide 10% - 20%

[0006] Talc powder 30% - 40% [...

Examples

Embodiment Construction

[0014] Embodiment adopts optimal proportioning (weight ratio) to be:

[0015] Titanium dioxide 15%

[0016] Talc 35%

[0017] Water-soluble wax 15%

[0018] Glycerin 5%

[0019] water 30%

[0020] Process description:

[0021] 1. Mixing: Mix titanium dioxide and talcum powder, add water-soluble wax, glycerin, and water and stir well to make a paste.

[0022] 2. Casting: Fill the paste into the mold, take it out after compaction, and fully dry it.

[0023] 3. Drying: Put the semi-finished product in the oven after drying, bake at 120°C for 1-2 hours, take it out and cool it naturally.