CN109135430A - Dust-free chalk - Google Patents
Dust-free chalk Download PDFInfo
- Publication number
- CN109135430A CN109135430A CN201710499458.XA CN201710499458A CN109135430A CN 109135430 A CN109135430 A CN 109135430A CN 201710499458 A CN201710499458 A CN 201710499458A CN 109135430 A CN109135430 A CN 109135430A
- Authority
- CN
- China
- Prior art keywords
- parts
- dust
- chalk
- free chalk
- paris
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D13/00—Pencil-leads; Crayon compositions; Chalk compositions
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The present invention provides a kind of dust-free chalk, by following parts by weight at being grouped as: 20~25 parts of calcium carbonate, 60-70 parts of the plaster of paris, 10-12 parts of magnesia, 1-2 parts of polyvinyl alcohol, 1-2 parts of glycerine, 3-4 parts of white oil, 1.5-2.5 parts of mill base, 100-120 parts of water.The formula of the invention is reasonable, and using effect is good, and production cost is low.
Description
Technical field
Invention belongs to the manufacturing technology of school supply and stationery chalk.Dust-free chalk, which is scientifically said, should be referred to as micronic dust chalk.
Background technique
Teacher at school when carry out writing on the blackboard with chalk on blackboard, chalk dust is flown upward, and seriously affects the health of teacher.
There is " dust-free chalk " new product in recent years abroad, and produces strong repercussion in educational circles, is highly valued.
In fact, from the perspective of science, it is to lean on the coverage of dirt and present because of chalk writing that absolute dust-free chalk, which is impossible,
Writing, therefore the meaning of dust-free chalk refers to that the dust quantity of its Dust Capacity chalk more common than its greatly reduces.To reach improvement religion
Teacher's working environment, the purpose of advantageous teachers and students' health.China only has a small number of area productions such as Beijing, Shanghai, Zhejiang without dirt powder at present
Pen；But effect is undesirable, high production cost.
Summary of the invention
The dust-free chalk that the purpose of the present invention is to provide a kind of effects is good, production cost is low.
The specific technical solution of the present invention is as follows:
A kind of dust-free chalk, by following parts by weight at being grouped as: 20~25 parts of calcium carbonate, 60-70 parts of the plaster of paris, magnesia
10-12 parts, 1-2 parts of polyvinyl alcohol, 1-2 parts of glycerine, 3-4 parts of white oil, 1.5-2.5 parts of mill base, 100-120 parts of water.
Preferably, dust-free chalk of the present invention is by following parts by weight at being grouped as: 23 parts of calcium carbonate, the plaster of paris 65
Part, 12 parts of magnesia, 1.5 parts of polyvinyl alcohol, 1 part of glycerine, 3.5 parts of white oil, 2 parts of mill base, 115 parts of water.
The formula of the invention is reasonable, and using effect is good, and production cost is low.
Specific embodiment
The present invention is further illustrated with reference to embodiments.
Embodiment 1
A kind of dust-free chalk is by following parts by weight at being grouped as: 23 parts of calcium carbonate, 65 parts of the plaster of paris, 12 parts of magnesia, poly- second
1.5 parts of enol, 1 part of glycerine, 3.5 parts of white oil, 2 parts of mill base, 115 parts of water.
Embodiment 2
A kind of dust-free chalk is by following parts by weight at being grouped as: 25 parts of calcium carbonate, 61 parts of the plaster of paris, 11 parts of magnesia, poly- second
1.8 parts of enol, 1.5 parts of glycerine, 4 parts of white oil, 2.4 parts of mill base, 120 parts of water.
Claims (2)
1. a kind of dust-free chalk, it is characterized in that: by following parts by weight at being grouped as: 20~25 parts of calcium carbonate, plaster of paris 60-70
Part, 10-12 parts of magnesia, 1-2 parts of polyvinyl alcohol, 1-2 parts of glycerine, 3-4 parts of white oil, 1.5-2.5 parts of mill base, water 100-120
Part.
2. dust-free chalk according to claim 1, it is characterized in that: by following parts by weight at being grouped as: 23 parts of calcium carbonate,
65 parts of the plaster of paris, 12 parts of magnesia, 1.5 parts of polyvinyl alcohol, 1 part of glycerine, 3.5 parts of white oil, 2 parts of mill base, 115 parts of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499458.XA CN109135430A (en) | 2017-06-27 | 2017-06-27 | Dust-free chalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499458.XA CN109135430A (en) | 2017-06-27 | 2017-06-27 | Dust-free chalk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109135430A true CN109135430A (en) | 2019-01-04 |
Family
ID=64805042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710499458.XA Pending CN109135430A (en) | 2017-06-27 | 2017-06-27 | Dust-free chalk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109135430A (en) |
-
2017
- 2017-06-27 CN CN201710499458.XA patent/CN109135430A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190104 |