CN103468061B - Environmental protection dust-free chalk - Google Patents
Environmental protection dust-free chalk Download PDFInfo
- Publication number
- CN103468061B CN103468061B CN201310386442.XA CN201310386442A CN103468061B CN 103468061 B CN103468061 B CN 103468061B CN 201310386442 A CN201310386442 A CN 201310386442A CN 103468061 B CN103468061 B CN 103468061B
- Authority
- CN
- China
- Prior art keywords
- parts
- chalk
- environmental protection
- dust
- mill base
- 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.)
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- 230000007613 environmental effect Effects 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims abstract description 5
- 239000000839 emulsion Substances 0.000 claims abstract description 5
- 229920002689 polyvinyl acetate Polymers 0.000 claims abstract description 5
- 239000011118 polyvinyl acetate Substances 0.000 claims abstract description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 15
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 12
- 239000010440 gypsum Substances 0.000 description 9
- 229910052602 gypsum Inorganic materials 0.000 description 9
- 239000011505 plaster Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 4
- 239000011507 gypsum plaster Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 210000003800 pharynx Anatomy 0.000 description 4
- 230000003203 everyday effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 210000001331 nose Anatomy 0.000 description 2
- 208000019693 Lung disease Diseases 0.000 description 1
- 208000025865 Ulcer Diseases 0.000 description 1
- 230000001754 anti-pyretic effect Effects 0.000 description 1
- 239000002221 antipyretic Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- ZHZFKLKREFECML-UHFFFAOYSA-L calcium;sulfate;hydrate Chemical compound O.[Ca+2].[O-]S([O-])(=O)=O ZHZFKLKREFECML-UHFFFAOYSA-L 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 230000035922 thirst Effects 0.000 description 1
- 230000017423 tissue regeneration Effects 0.000 description 1
- 231100000397 ulcer Toxicity 0.000 description 1
- 210000003135 vibrissae Anatomy 0.000 description 1
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
Environmental protection dust-free chalk of the present invention, material formula is: gesso 15-20 part, chalk powder 15-20 part, water 15-20 part; Mill base 3-5 part; Described mill base is by polyvinyl acetate emulsion 2-5 part, polyvinyl alcohol 2-3 part, the aqueous solution that water is 50 parts, its product have write smoothly, writing is clear, hardness is moderate, dust such as not easily to fly upward less at the feature.
Description
Technical field
The invention belongs to a kind of chalk.
Background technology
Chalk is the instrument widely used in daily life, is generally used for book and writes on the blackboard.The chalk in ancient times is made with natural chalk usually, but now multiplex other material replace.The composition of chalk is a kind of white depositions of calcium sulfate, and be not easy to be decomposed, particle is larger than dust.Now, the chalk of domestic use mainly contains common chalk and dust-free chalk two kinds, and its main component is calcium carbonate (Wingdale) and calcium sulfate (gypsum), or containing a small amount of calcium oxide.Chalk be by
calcium sulfatehydrate (being commonly called as plaster stone) make.Also can add various
pigmentmake pastel.In making processes, plaster stone is heated to certain temperature, makes its partial dehydration age gypsum, then the plaster of Paris is added water and stir into pasty state, pour into model and solidify and form.The reaction of plaster stone age gypsum is (needing to heat): the reaction becoming plaster stone that adds water of the 2CaSO42H2O=2CaSO4H2O+3H2O plaster of Paris is (normal temperature): 2CaSO4H2O+3H2O=2CaSO42H2O
teacheroften need write on blackboard, draw and explain.In a class of 45 ~ 50 minutes, will erasable several, lower class hour, often on hand, on sleeve, even hair, shoulder all leave one deck white chalk dust.Everyday like this, year after year, work after 20 ~ 30 years, worn down ten hundreds of chalks.Inevitably suck some chalk dusts from nostril.Whether suck chalk dust to cause a disease, be the problem that numerous teachers are most deeply concerned.Chalk is made up of gypsum.The composition of gypsum is calcium sulfate.Gypsum stable performance, nontoxic.For thousands of years, in medical plaster stone (the calcium sulfate CaSO--42H2O containing crystal water) decoction, external application plaster of paris (plaster of Paris) applies affected part.Thinking can be refrigerant antipyretic, promotes the production of body fluid to quench thirst, promoting tissue regeneration and ulcer healing.Use chalk-writing
writing on the blackboard, be that gypsum powder is coated on blackboard.During blackboard wiping, Gypsum dust (chalk dust) in atmosphere of short duration wave after to fall object plane near blackboard and on the ground.Its particle is comparatively large, and how more than 100 microns, heavier, fall very fast, the time of aloft floating is short.According to labour hygiene pertinent data, the dust particle in production, living environment air, diameter is person more than 10 ~ 20 microns, inhales majority in time and is stopped by vibrissa, nose, pharynx, throat, be attached to mucous membrane small airway and alveolar through nostril.If to the harmful material of body (as
silicon-dioxide, asbestos),
alveolarand accumulate more in small airway, will cause damage to human body.From the above, the particle of chalk dust is comparatively large, and scarcely can be drawn into lower respiratory tract, add that again gypsum itself is to human non-toxic, medical circle also there is no the report causing pulmonary disorder because sucking chalk dust so far.
china's workhygiene department, in occupation
pneumoconiosisrelevant regulations in, also not using the cause of disease of chalk dust as lung.Although chalk dust there is no large evil to human body, but the teacher that China is millions of, every day all does writing on the blackboard with chalk, all lives in every day in the chalk dust after blackboard wiping, still can cause nose, pharynx, throat's discomfort.There is the deficiency of healthy effect in it.
Retrieve through Chinese publication, do not find the scheme identical with present patent application.
Summary of the invention:
The object of the invention is to; A kind of environmental protection dust-free chalk is proposed.
Environmental protection dust-free chalk of the present invention, is characterized in that: by weight, and material formula is: gesso 15-20 part, chalk powder 15-20 part, water 15-20 part; Mill base 3-5 part, described mill base is by polyvinyl acetate emulsion 2-5 part, polyvinyl alcohol 2-3 part, the aqueous solution that water is 50 parts.
Environmental protection dust-free chalk preparation method of the present invention, is characterized in that: by weight, and by gesso 15-20 part, after the mixing of chalk powder 15-20 part, the 15-20 part that adds water stirs; Add mill base 3-5 part, after stirring, extrusion molding, drying both environmental protection dust-free chalk of the present invention.
Environmental protection dust-free chalk of the present invention, have write smoothly, writing is clear, hardness is moderate, dust such as not easily to fly upward less at the feature.
The present invention compared with prior art its beneficial effect is: have write smoothly, writing is clear, hardness is moderate, dust such as not easily to fly upward less at the feature.
Concrete embodiment:
Below in conjunction with embodiment, the invention will be further described, but embodiments of the present invention are not limited thereto.
Environmental protection dust-free chalk of the present invention, raw materials usedly buys acquisition.
Embodiment 1
Environmental protection dust-free chalk of the present invention, is characterized in that: by weight, and material formula is: gesso 15-20 part, chalk powder 15-20 part, water 15-20 part; Mill base 3-5 part, described mill base is by polyvinyl acetate emulsion 2-5 part, polyvinyl alcohol 2-3 part, the aqueous solution that water is 50 parts.
Embodiment 2
Environmental protection dust-free chalk preparation method of the present invention, is characterized in that: by weight, and by gesso 15-20 part, after the mixing of chalk powder 15-20 part, the 15-20 part that adds water stirs; Add mill base 3-5 part, after stirring, extrusion molding, drying both environmental protection dust-free chalk of the present invention.
Environmental protection dust-free chalk of the present invention, have write smoothly, writing is clear, hardness is moderate, dust such as not easily to fly upward less at the feature.
Claims (2)
1. an environmental protection dust-free chalk, is characterized in that: by weight, and material formula is: gesso 20 parts, chalk powder 15 parts, 15 parts, water; Mill base 3 parts, described mill base is polyvinyl acetate emulsion 5 parts, polyvinyl alcohol 3 parts, the aqueous solution that water is 50 parts.
2. an environmental protection dust-free chalk preparation method, is characterized in that: by weight, by gesso 20 parts, after chalk powder 15 parts mixing, adds water 15 parts and stirs; Add mill base 3 parts, after stirring, extrusion molding, is drying to obtain environmental protection dust-free chalk of the present invention; Described mill base is polyvinyl acetate emulsion 5 parts, polyvinyl alcohol 3 parts, the aqueous solution that water is 50 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386442.XA CN103468061B (en) | 2013-08-30 | 2013-08-30 | Environmental protection dust-free chalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386442.XA CN103468061B (en) | 2013-08-30 | 2013-08-30 | Environmental protection dust-free chalk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103468061A CN103468061A (en) | 2013-12-25 |
| CN103468061B true CN103468061B (en) | 2015-09-30 |
Family
ID=49793113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310386442.XA Active CN103468061B (en) | 2013-08-30 | 2013-08-30 | Environmental protection dust-free chalk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103468061B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826025A (en) * | 2020-08-17 | 2020-10-27 | 淮阴工学院 | Regenerated chalk manufactured based on industrial waste alkaline residues |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046746A (en) * | 1989-04-29 | 1990-11-07 | 刘凤义 | Film enveloped chalk is made liquid |
| CN1796470A (en) * | 2004-12-29 | 2006-07-05 | 薛玮翔 | Fragrant coloured chalk without dust |
-
2013
- 2013-08-30 CN CN201310386442.XA patent/CN103468061B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046746A (en) * | 1989-04-29 | 1990-11-07 | 刘凤义 | Film enveloped chalk is made liquid |
| CN1796470A (en) * | 2004-12-29 | 2006-07-05 | 薛玮翔 | Fragrant coloured chalk without dust |
Non-Patent Citations (1)
| Title |
|---|
| 李东光.粉笔.《1000种小化工产品配方与制作(1-200)》.2012, * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103468061A (en) | 2013-12-25 |
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| 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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 542800 the Guangxi Zhuang Autonomous Region Hezhou City eight step Xiyuan No. 40 Lane eight new materials research and Development Institute Patentee after: Long Qizhi Address before: 542800, Baisha Town, Fuchuan County, Hezhou, the Guangxi Zhuang Autonomous Region Patentee before: Long Qizhi |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191022 Address after: 314502 202a, building B, 369 GONGMAO Avenue, Puyuan Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Tongxiang Hongchen Industrial Design Co., Ltd Address before: 542800 the Guangxi Zhuang Autonomous Region Hezhou City eight step Xiyuan No. 40 Lane eight new materials research and Development Institute Patentee before: Long Qi Zhi |