CN1868761A - Manufacturing method of dustless chalk - Google Patents
Manufacturing method of dustless chalk Download PDFInfo
- Publication number
- CN1868761A CN1868761A CN 200610046902 CN200610046902A CN1868761A CN 1868761 A CN1868761 A CN 1868761A CN 200610046902 CN200610046902 CN 200610046902 CN 200610046902 A CN200610046902 A CN 200610046902A CN 1868761 A CN1868761 A CN 1868761A
- Authority
- CN
- China
- Prior art keywords
- chalk
- dust
- paraffin
- idiosome
- free
- 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
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
A process for preparing a non-dust chalk includes such steps as proportionally mixing CaCO3 with Ca(HCO3)2, stirring, filling the mixture in mould, compacting to obtain raw chalk, immersing it in the alcohol solution of paraffin wax, and drying in the air.
Description
Technical field
The present invention relates to a kind of preparation method of chalk, particularly relate to a kind of preparation method of dust-free chalk.
Background technology
Employed necessity when chalk is teachers ' teaching, present employed chalk all can produce a large amount of chalk dusts, and the dust when chalk is write not only pollutes classroom environment, the more important thing is that Faculty and Students can the harm health after sucking.These chalk dusts act on the skin and the lung of human body, accumulate over a long period, and harmfulness is very big.When skin is stained with chalk dust, can cause dermatitis, particularly summer high-temperature season, human body is perspired in a large number, and the chalk dust that sticks to skin surface blocks pore easily, if do not have timely cleaning can cause the leather bag inflammation.When human body sucks chalk dust for a long time, can stimulate upper respiratory tract mucosa, so that cause rhinitis, sphagitis, bronchitis.Contain lime class basic species, VOC and adhesive etc. in the chalk dust human body is had strong harmfulness composition, therefore suffer from the about 30% of rhinitis, pharyngitis, uncomfortable in chest, asthma, pneumoconiosis, pneumonia, pulmonary tuberculosis, chronic cardiopulmonary disease, lung cancer, the student is because of quite growing many that the harm that is subjected to chalk dust also will be big in the classroom time.
Summary of the invention
The objective of the invention is to overcome the existing high shortcoming of dust-free chalk price, improve by test, provide a kind of with CaCO
3And Ca (HCO
3)
2, paraffin is the preparation method of the low-cost dust-free chalk of raw material.
The objective of the invention is to be achieved through the following technical solutions:
A kind of preparation method of dust-free chalk, its manufacturing process is: earlier with CaCO
3And Ca (HCO
3)
21: 0.35 in mass ratio～0.50 mixes, and with the mixture uniform mixing, pours chalk die into, and the demoulding behind the compaction moulding forms the chalk idiosome; Dissolve in the alcohol with 15 times of quality of paraffin adding, with 10～20 seconds of alcoholic solution that the chalk idiosome is put into paraffin, taking-up is dried, and is dust-free chalk again.
Aforesaid CaCO
3And Ca (HCO
3)
2, paraffin is technical grade product.
Advantage of the present invention and effect are:
Production technology of the present invention is simple, cost of manufacture is low, does not have dust when writing with wiping.
The specific embodiment
Embodiment 1
With CaCO
3And Ca (HCO
3)
2Mix at 1: 0.35 in mass ratio, with the mixture uniform mixing, pour chalk die into, the demoulding behind the compaction moulding forms the chalk idiosome.Dissolve in the alcohol with 15 times of quality of paraffin adding, with 10 seconds of alcoholic solution that the chalk idiosome is put into paraffin, taking-up is dried, and is dust-free chalk.
Embodiment 2
With CaCO
3And Ca (HCO
3)
2Mix at 1: 0.50 in mass ratio, with the mixture uniform mixing, pour chalk die into, the demoulding behind the compaction moulding forms the chalk idiosome.Dissolve in the alcohol with 15 times of quality of paraffin adding, with 10 seconds of alcoholic solution that the chalk idiosome is put into paraffin, taking-up is dried, and is dust-free chalk.
Embodiment 3
With CaCO
3And Ca (HCO
3)
2Mix at 1: 0.50 in mass ratio, with the mixture uniform mixing, pour chalk die into, the demoulding behind the compaction moulding forms the chalk idiosome.Dissolve in the alcohol with 15 times of quality of paraffin adding, with 20 seconds of alcoholic solution that the chalk idiosome is put into paraffin, taking-up is dried, and is dust-free chalk.
Claims (2)
1. the preparation method of a dust-free chalk is characterized in that its manufacturing process is: earlier with CaCO
3And Ca (HCO
3)
21: 0.35 in mass ratio～0.50 mixes, and with the mixture uniform mixing, pours chalk die into, and the demoulding behind the compaction moulding forms the chalk idiosome; Dissolve in the alcohol with 15 times of quality of paraffin adding, with 10～20 seconds of alcoholic solution that the chalk idiosome is put into paraffin, taking-up is dried, and is dust-free chalk again.
2. the preparation method of a kind of dust-free chalk according to claim 1 is characterized in that described CaCO
3And Ca (HCO
3)
2, paraffin is technical grade product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610046902 CN1868761A (en) | 2006-06-15 | 2006-06-15 | Manufacturing method of dustless chalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610046902 CN1868761A (en) | 2006-06-15 | 2006-06-15 | Manufacturing method of dustless chalk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1868761A true CN1868761A (en) | 2006-11-29 |
Family
ID=37442590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610046902 Pending CN1868761A (en) | 2006-06-15 | 2006-06-15 | Manufacturing method of dustless chalk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1868761A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550301B (en) * | 2009-05-23 | 2010-08-18 | 曾爱军 | Biochemical chalk and preparation method thereof |
-
2006
- 2006-06-15 CN CN 200610046902 patent/CN1868761A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550301B (en) * | 2009-05-23 | 2010-08-18 | 曾爱军 | Biochemical chalk and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fang et al. | A study of traditional blood lime mortar for restoration of ancient buildings | |
| CN101940909B (en) | Efficient ecotype inorganic formaldehyde adsorbing material and preparation method thereof | |
| CN104403399B (en) | Internal wall putty with humidity-regulating and moistureproof functions | |
| CN105778164B (en) | Curriculum Standards for English specialized hand plasticine and preparation method thereof | |
| CN101348627A (en) | Dust absorbing, dust removing inner wall decorative coating and preparation thereof | |
| CN101607750B (en) | Sewage purifying agent | |
| CN105358767B (en) | Adsorption and desorption wallpaper and preparation method thereof | |
| CN1868761A (en) | Manufacturing method of dustless chalk | |
| CN101705034A (en) | Water-soluble dustfree chalks | |
| CN101550301B (en) | Biochemical chalk and preparation method thereof | |
| CN102226050A (en) | Dust-free chalk and manufacture method thereof | |
| CN101113078A (en) | Novel glass fungus-proof insulating powder | |
| CN102504051B (en) | Method for solidifying nature rubber fresh latex through double parallel-flow and solidification liquid | |
| CN103571277A (en) | Preparation method of dustless chalk | |
| CN102952433B (en) | Water-soluble chalk | |
| CN1868703A (en) | Manufacturing method of wood seam filling agent | |
| CN103611433B (en) | A kind of shitosan/lithium chloride hybrid films and its preparation method and application | |
| CN106588105A (en) | Diatomite water absorption pad and preparation method therefor | |
| CN105401240B (en) | It is a kind of that catalytic waste gas is had based on electrostatic spinning technique and adsorbs the dual-purpose nanofiber preparation method of dust particle | |
| CN102442106A (en) | Chalky teaching chalk and manufacturing method thereof | |
| CN103568638A (en) | Non-sticky dust-free chalk | |
| CN102337058A (en) | Novel dust-free chalk and manufacturing method thereof | |
| CN103045018B (en) | Dust-free and environment-friendly chalk and preparation method thereof | |
| CN104396765A (en) | Mineral adsorption type cat litter and preparation method thereof | |
| CN110527327A (en) | A kind of method of preparation and use of high rigidity damp-proofing ground floor curing agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |