CN1307979A - Blackboard writing pen and its making process - Google Patents
Blackboard writing pen and its making process Download PDFInfo
- Publication number
- CN1307979A CN1307979A CN 01107638 CN01107638A CN1307979A CN 1307979 A CN1307979 A CN 1307979A CN 01107638 CN01107638 CN 01107638 CN 01107638 A CN01107638 A CN 01107638A CN 1307979 A CN1307979 A CN 1307979A
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- pigment
- water
- blackboard writing
- writing pen
- pen
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- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The preparation method of pen for writing on blackboard includes the following steps: mixing polyethylene glycol, stearic acid and water, its mixing temp. is 70-100 deg.C after 5-20 min. adding pigment and filling material continuously mixing the make the mixture undergo the processes of cross-linking and condensating treatment to make the above-mentioned materials into paste-like material, then extruding said paste-like material into pen-lire product. Said invented product has no dust or toxicity, can be smoothly written, and its handwriting is clear, and can be scraped by using wet soft material.
Description
The present invention relates to chemical field, particularly a kind of non-dusting blackboard writing pen and preparation method thereof.
Existing blackboard writing pen mainly is the chalk that uses of tradition and with erasability blank pen and the advertising pen of organic solvent as matrix.Constantly produce dust in traditional chalk use, contaminated environment, and wipe on the blackboard of back and leave scratch, seem unclean.In order to solve the chalk dust pollution problem, improvement was arranged in recent years, the adhesive that for example in traditional chalk raw material, adds carboxymethyl cellulose, ethyl cellulose, polyvinyl alcohol, make the dust chap, do not fly upward everywhere after coming off, but since adhesive the powder adhesion, write just so fluent, the visibility of person's handwriting also decreases, and still has dust to produce; Also have in traditional chalk raw material and add ferrite powder, adopt magnetic blackboard eraser to hold powder when wiping to reach dustless effect, in fact magnetic blackboard eraser can not exhaust all dust, the non-magnetic material major part still flies, simultaneously, because ferrite particle is big and heavy, writes and also becomes happy inadequately.Also there is common shortcoming in above-mentioned chalk, is easy to loss exactly, fractures easily, and blackboard is smooth a little or when getting damp again spring, writes and skids, and it is unclear to show word.With the organic solvent is the erasability blank pen of matrix, be exclusively used in and write smooth blank, the volatilization of organic solvent has a kind of offensive odour when writing, and this smell endangers to some extent to health, simultaneously because the solvent highly volatile, often cause that nib is dry and hard and influence is used, after person's handwriting was done, the pigment conjunctiva was wiped dustless, but this film body can be reduced into dust by complete dehumidification in dry season, this dirt is the organic matter condensation body with certain toxicity, and is bigger to the harm of human body.Advertising pen is that liquid poster colour is poured in a kind of special shell, writes onboard by fiber nib, and its pigment is easy to precipitation, and often stifled nib is write on coarse slightly plate such as frosted glass, is difficult for wiping clean.
The object of the present invention is to provide a kind of do not have dust, the avirulent blackboard writing pen that can on any surface, write, write smoothly, have a clear handwriting, bright and lustrous, wipe promptly clean with wet soft material one.
The present invention also aims to provide a kind of preparation method of blackboard writing pen.
The preparation method of blackboard writing pen of the present invention comprises:---polyethylene glycol, stearic acid, pigment, filler, water are mixed, and mixing temperature is 70-200 ℃, is sticky shape up to mixture interlinkage, condensation;---above-mentioned material is extruded into lip pencil or pen core shape, adds shell and uses; The weight of above-mentioned raw materials is composed as follows: the described pigment of polyethylene glycol 10-50 stearic acid 0.2-5 pigment 1.5-50 filler 0-30 water 0-15 is resistance to water pigment.
The inventor finds that following pigment is particularly suitable for the present invention: titanium dioxide, zinc oxide, carbon black, plastics toner, look mother, water base colorant and other water-fast dyestuffs.
Described filler can be to make the general filler of chalk, and the inventor finds that following filler is particularly suitable for the present invention: precipitated calcium carbonate, Xin Beibai, talcum powder etc.; Polyethylene glycol, molecular weight can select 200,400,4000,6000,10000,20000.
In the above-mentioned raw materials, polyethylene glycol is a carrier, and its effect is to allow copolymer interlinkage, condensation moulding, reaches the anti-effect of writing anti-stroke, not the low wet condition of frangibility and maintenance.
Stearic acid is a lubricant, and its effect is that lubricated sense and happy sense are arranged when blackboard writing pen of the present invention is write preferably, and makes person's handwriting hydrophobic to some extent, and pigment is not opened and the complete stroke of clear display by aquation when further consolidating it and writing on the plate face of humidity.
The consumption of water is decided on the needs of mixing, when being difficult for mixing, adds water until mixing easily.
The effect of filler is the volume that increases composite material, reduces the cost cost.
Mixing can be taked the form that stirs or mix and stir, for example uses mixer, mixer, mixer etc.
During the blackboard writing pen moulding, can adopt to change and irritate the mould mode or extrude with extruder or injection machine.
Blackboard writing pen can directly use, and also can directly put it into a shell of cap, screw out to build after writing, or as propelling pencil by going out to write.
The present invention compared with prior art has following advantage:
1, can not produce dust pollution and being detrimental to health;
2, can on existing any plate face, write;
2, write smoothly, have a clear handwriting, bright and lustrous;
3, promptly clean with wipings such as wet towels, do not stay scratch;
4, write 10-20 times that length can reach the equal volume chalk;
5, the preparation method is simple, and cost is low.
Further specify the present invention below in conjunction with embodiment.
Embodiment 1
30 kilograms of polyethylene glycol, 3 kilograms of stearic acid, 8 kg of water, 35 kilograms of titanium dioxide, 15 kilograms of precipitated calcium carbonates are mixed, and temperature is controlled between 70-100 ℃, is sticky shape until mixture interlinkage, condensation; Use extruder for shaping.
Embodiment 2
50 kilograms of polyethylene glycol, 0.240 kilogram of stearic acid, 3 kg of water, 15 kilograms of titanium dioxide and 22 kilograms of precipitated calcium carbonates, 5 kg of water primary colours slurries are mixed, and temperature is controlled between 100-150 ℃, is sticky shape until mixture interlinkage, condensation; Irritate mold forming.
Embodiment 3
With 20 kilograms of polyethylene glycol, 2 kilograms of stearic acid, 50 kilograms of zinc oxide, 30 kilograms of lithopones, mix stirring down at 200 ℃, be sticky shape until mixture interlinkage, condensation; Use the injection machine casting.
Embodiment 4
With 10 kilograms of polyethylene glycol, 5 kilograms of stearic acid, 1.5 kilograms of carbon blacks, mix stirring down at 100 ℃, be sticky shape until mixture interlinkage, condensation; Use the injection machine casting.
Claims (4)
- The preparation method of 1 one kinds of blackboard writing pens is characterized in that comprising:---polyethylene glycol, stearic acid, pigment, filler, water are mixed, and mixing temperature is 70-200 ℃, is sticky shape up to mixture interlinkage, condensation;---above-mentioned material is extruded into lip pencil or pen core shape, adds shell and uses; The weight of above-mentioned raw materials is composed as follows: the described pigment of polyethylene glycol 10-50 stearic acid 0.2-5 pigment 1.5-50 filler 0-30 water 0-15 is resistance to water pigment.
- 2, blackboard writing pen according to claim 1 is characterized in that pigment is titanium dioxide, zinc oxide, carbon black, plastics toner, look mother, water base colorant and other water-fast dyestuffs.
- 3, blackboard writing pen according to claim 1 and 2 is characterized in that filler is precipitated calcium carbonate, Xin Beibai, talcum powder.
- 4, a kind of blackboard writing pen for preparing by the preparation method of the described blackboard writing pen of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011076380A CN1138647C (en) | 2001-03-15 | 2001-03-15 | Blackboard writing pen and its making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011076380A CN1138647C (en) | 2001-03-15 | 2001-03-15 | Blackboard writing pen and its making process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1307979A true CN1307979A (en) | 2001-08-15 |
| CN1138647C CN1138647C (en) | 2004-02-18 |
Family
ID=4656553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011076380A Expired - Fee Related CN1138647C (en) | 2001-03-15 | 2001-03-15 | Blackboard writing pen and its making process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1138647C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392373A (en) * | 2011-09-01 | 2012-03-28 | 朱仲洪 | Tailoring chalk and process flow for manufacturing same |
| CN103073956A (en) * | 2013-01-14 | 2013-05-01 | 山西大学 | Fadable coloured chalk for white board |
-
2001
- 2001-03-15 CN CNB011076380A patent/CN1138647C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392373A (en) * | 2011-09-01 | 2012-03-28 | 朱仲洪 | Tailoring chalk and process flow for manufacturing same |
| CN102392373B (en) * | 2011-09-01 | 2016-06-22 | 朱仲洪 | Cutting cloth tailor's chalk and make the technological process of this cutting cloth tailor's chalk |
| CN103073956A (en) * | 2013-01-14 | 2013-05-01 | 山西大学 | Fadable coloured chalk for white board |
| CN103073956B (en) * | 2013-01-14 | 2014-10-22 | 山西大学 | Fadable coloured chalk for white board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1138647C (en) | 2004-02-18 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |