CN1041214C - Formula and process of wet dust-free chalk - Google Patents
Formula and process of wet dust-free chalk Download PDFInfo
- Publication number
- CN1041214C CN1041214C CN 93104131 CN93104131A CN1041214C CN 1041214 C CN1041214 C CN 1041214C CN 93104131 CN93104131 CN 93104131 CN 93104131 A CN93104131 A CN 93104131A CN 1041214 C CN1041214 C CN 1041214C
- Authority
- CN
- China
- Prior art keywords
- chalk
- dust
- writing
- formula
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title abstract description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000011187 glycerol Nutrition 0.000 claims abstract description 9
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 7
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 7
- 239000000661 sodium alginate Substances 0.000 claims abstract description 7
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 10
- 241000206672 Gelidium Species 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 4
- 239000010440 gypsum Substances 0.000 abstract description 4
- 229910052602 gypsum Inorganic materials 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 2
- -1 amine chloride Chemical class 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000005303 weighing Methods 0.000 description 4
- 229920002261 Corn starch Polymers 0.000 description 3
- 239000008120 corn starch Substances 0.000 description 3
- 229940099112 cornstarch Drugs 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 2
- 230000002110 toxicologic effect Effects 0.000 description 2
- 231100000027 toxicology Toxicity 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention relates to a formula and a process of wet dust-free chalk. It is made up by using gypsum powder, talcum powder, sodium alginate, amine chloride, glycerine and water through the processes of mixing and casting. The chalk keeps the humidity permanently, the writing and wiping do not have dust flying, do not change the paste, write smoothly, do not skid, the writing is clear, not sticky, the material used is nonhazardous, there is no waste water waste liquid treatment problem. Thoroughly solves the pollution of dust flying of common chalk and tiny dust chalk to the teaching environment. In addition, the invention has the advantages of fast curing and hardening, easy moisture removal and reduced drying cost.
Description
The present invention relates to the prescription and the production technique of a kind of chalk, particularly a kind of moist dust-free chalk.
Common chalk is to be formed by the semi-hydrated gypsum chill casting, or is formed by the extruding of Cornstarch interpolation tackiness agent.Gypsum chalk contains pore, and easily, proportion is less, the writing sharpness height of writing, but dust from flying is very big.The Cornstarch pen is more closely knit, and proportion is bigger, but the varying in size of suffered frictional force during because of writing on the blackboard, blackboard wiping, and dust granules varies in size, and little still flying dust is all over the sky.In recent years, people have done many effort and exploration to the research of chalk, have also obtained certain effect.For example Chinese patent discloses a kind of " prescription of novel micronic dust chalk and technology " (application number has been: 86103372), it is to be raw material with semi-hydrated gypsum powder, Cornstarch, water, make by certain proportioning, the all more aforementioned two kinds of chalks of effect are for well, but the problem of chalk dust, skidding are also not basic to solve.
The objective of the invention is to avoid above-mentioned weak point of the prior art and a kind of moist dust-free chalk is provided, this chalk is permanent to keep moist, during use, and no dust from flying, non-slip, writing sharpness height, toxicological harmless effect.
The present invention is mixed by gesso, talcum powder, sodium alginate (or sea moss), ammonia chloride, G ﹠ W to form through casting.Its prescription (by weight percentage) is:
Gesso 30～60%, talcum powder 1.28～3.47%, ammonium chloride 0.0001～2%, glycerine 0.75～4.29%, and sodium alginate 0.0001～1%, sea moss 0.0001～1% are wherein a kind of, surplus is a water.
The effect of above-mentioned each component is: talcum powder is a lubricant, and glycerine is wetting Agent for Printing Inks, and sodium alginate, sea moss and ammonia chloride then are hardness and the toughness that strengthens chalk.
Through the chalk of cast molding, can natural air drying, or carry out drying by heating, bake out temperature mustn't be greater than 55 ℃.
The present invention has following advantage compared to existing technology: 1, write soft and smooth, fluent, non-slip, writing is pure white, clear, easy wiping.2, chalk and the powder write out are lasting keeps moist, and the wiping powder does not have and flies upward, and constant paste.3, toxicological harmless effect, health, tack-free, sticking clothes, and the releasing of imperial end uses the dryness chalk to cause the misery that finger skin is cracked from dryness.4, the hardening of shaping and demoulding after fixing is fast, removes moisture content easily, reduces baking, shines cost.
Embodiment:
Raw material weight %
Gesso 46.91
Talcum powder 2.47
Sodium alginate 0.0025
Ammonia chloride 0.0025
Glycerine 1.23
Water 49.385
Take by weighing gesso and talcum powder by formula rate, mixing is stand-by; Taking by weighing 30～40 ℃ of warm water by formula rate places in the stirred vessel stand-by; Take by weighing ammonia chloride by formula rate, and get the water that is five times in ammonia chloride place in the container from the proportioning water that has weighed up, pouring ammonia chloride into, to stir evenly into thin liquid stand-by; Take by weighing glycerine by formula rate, get the water that is three times in glycerine again from the proportioning water that has weighed up and place in another container, pouring glycerine into, to stir into thin liquid stand-by.Then in stirred vessel, on one side stir water, Yi Bian slowly pour sodium alginate into, make it become uniform viscous liquid after, pouring the ammonia chloride thin liquid into stirs, pour gesso and talcous powder mix again into, treat that nature soaks after, along after a direction stirs into finely starched, pouring the glycerine thin liquid under constantly stirring stirs, speed extremely stirs retrogradation gradually, i.e. moulded by casting slowly by fast then.Through cool, shine or be not higher than 55 ℃ of oven dry finished product packings.
Claims (2)
1, a kind of moist dust-free chalk is characterized in that by gesso 30～60% talcum powder 1.28～3.47%, ammonia chloride 0.0001～2%, glycerine 0.75～4.29%, and sodium alginate 0.0001～1%, sea moss 0.0001～1% are wherein a kind of, surplus is that water is formed.
2, moist dust-free chalk according to claim 1, it is characterized in that cast molding after, bake out temperature must not be greater than 55 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104131 CN1041214C (en) | 1993-04-01 | 1993-04-01 | Formula and process of wet dust-free chalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104131 CN1041214C (en) | 1993-04-01 | 1993-04-01 | Formula and process of wet dust-free chalk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1077472A CN1077472A (en) | 1993-10-20 |
| CN1041214C true CN1041214C (en) | 1998-12-16 |
Family
ID=4985016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93104131 Expired - Fee Related CN1041214C (en) | 1993-04-01 | 1993-04-01 | Formula and process of wet dust-free chalk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1041214C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108659626A (en) * | 2018-07-11 | 2018-10-16 | 欧光君 | A kind of water-soluble chalk and its manufacturing method |
-
1993
- 1993-04-01 CN CN 93104131 patent/CN1041214C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1077472A (en) | 1993-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |