CN1038239C - Dry carbon paper and productive method - Google Patents
Dry carbon paper and productive method Download PDFInfo
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- CN1038239C CN1038239C CN 94111474 CN94111474A CN1038239C CN 1038239 C CN1038239 C CN 1038239C CN 94111474 CN94111474 CN 94111474 CN 94111474 A CN94111474 A CN 94111474A CN 1038239 C CN1038239 C CN 1038239C
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- carbon paper
- dry carbon
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Abstract
The present invention provides a piece of dry carbon paper and a production method thereof, which relates to a pressure sensing material for duplication. The dry carbon paper is composed of base paper, a middle isolation paint layer and a color transferring paint layer. First, a layer of middle isolation paint with the isolation function and the adhesive function is coated on one surface of the base paper by a coater; then, a layer of color transferring paint is coated on the middle isolation paint layer. When the dry carbon paper is used as tickets, bills, report forms, printed pictures and recorded documents, a plurality of copies can be obtained without carbon paper. The dry carbon paper of the present invention has the advantages of good anti-counterfeiting performance and good document performance, can be manufactured into various kinds of products such as flat paper, punching folding paper, reels, etc., and has convenient use.
Description
Dry carbon paper relates to a kind of pressure-sensitive material of making carbon copies usefulness.
By printing, the carbon paper that handwriting mode obtains many parts of copy usefulness first generation product just occurred as far back as eighties of last century, work out carbon element carbon paper the beginning of this century, work out NCR the fifties again, the like product " magic paper " (PHYSICALSELFIMAGING PAPER) that also has Germany, but the said goods still more or less has the following disadvantages: friction is polluted, coating is torn open to split easily and is come off, writing is easily wiped, the writing poor definition, light resistance is bad, the false proof anti-modification difference etc. that is coated with, as NCR price height, antifalsification is relatively poor, perishable relatively, there is friction to pollute the colour developing phenomenon, and distributed offending smell.The friction of carbon element carbon paper is polluted greatly, discomfort is fit to do the reel goods.
The objective of the invention is: a kind of dry carbon paper and production method thereof are provided, utilize this carbon paper to print or when hand-written, liner carbon paper just can obtain many parts of copies again, and pollute little, writing definition height, light resistance is good, good antifalsification and archives are arranged, can make the form of sheet, reel and punching folding, cost is low, and steady quality is reliable, the comprehensive quality index is better than existing like product.
Technical solution of the present invention is:
Dry carbon paper is made of for three layers body paper, intermediate isolating dope layer and coloured transfer coatings layer, has been coated with in the one side of body paper and has isolated and one deck intermediate isolating coating of adhesive effect, on the intermediate isolating dope layer, is coated with the coloured transfer coatings of one deck.Body paper adopts proprietary paper best, general high-quality writing paper, offset paper, carbonless copying body paper, and carbon element duplicating original paper, India paper, thin typographic printing paper also can use.Be coated with the intermediate isolating coating that one deck prepares in advance with coating machine earlier in the one side of body paper, the coloured transfer layer coating of coating one deck, polishing then on the intermediate isolating dope layer again.For improving the quality of dry carbon paper, utilize coating machine behind the intermediate isolating dope layer, with after the calender press polish, on the intermediate isolating dope layer, be coated with the coloured transfer coatings of one deck with coating machine more earlier, at last polishing.
Intermediate isolating coating is joined and is comprised:
Isolate 100 parts of antitack agents (weight, as follows)
Filler powder 0-50 part
Bonding, film forming agent 5-60 part
Colouring agent 0.1-1 part
Emulsification wetting agent 0.5-3 part
Fungusproof anti-corrosion agent 0.1-4 part
Alkaline matter 0-70 part
Water is adjusted to solid contents 8-15%
Solids among the present invention is meant at 105 ℃ dries the nonvolatile matter that stayed in the coating in 2 hours, (as follows) down.
The intermediate isolating coating constitutes and can select for use stock chart as follows respectively:
| The intermediate isolating coating constitutes | Can select raw material for use respectively |
| Isolate antitack agent | Stearic slaine and ammonia salt and organic amino salt, the slaine of high carbon chain acid and ammonia salt and organic amino salt, silicones, polyvinyl chloride and copolymer emulsion thereof, water and milk silicon rubber, containing hydrogen silicone oil, stearatochromic chloride, 16,18 amine, 16,18 alcohol |
| Bonding, film forming agent | Converted starch: oxidized starch, phosphate ester starch, hydroxypropul starch, enzyme starch, CMC (carboxymethyl cellulose), CMS (CMS), dialdehyde starch, dextrin, common starch etc., lactic casein, soya casein, PVA (polyvinyl alcohol), shellac, gum arabic, gelatin, synthetic resin emulsion and synthetic resin (comprise butylbenzene system, acrylic acid series, ethylene copolymer system, chloroethylene copolymer system, vinylidene chloride copolymerization system etc.) |
| The filler powder | Titanium dioxide, talcum powder, kaolin, calcium carbonate |
| Colouring agent | The organic pigment of no imbibition or inorganic pigment |
| The emulsification wetting agent | OP is emulsifying agent (Triton X-100), peregal (polyoxyethylene aliphatic alcohol ether), TX-10 (APES), glycerine |
| Fungusproof anti-corrosion agent | BCM (benzene different imidazoles amido methyl formate or be carbendazim), sodium benzoate, formaldehyde |
| Alkaline matter | NaOH, sodium carbonate, ammoniacal liquor, potassium hydroxide, borax, ethylenediamine |
Coloured transfer layer coating formula comprises:
Colouring agent 10-40 part (weight, as follows)
Pigment dispersing agent 0.5-8 part
100 parts of transfer membrane materials
Fungusproof anti-corrosion agent 0.1-3 part
Defoamer 1-3 part
Water is adjusted to solid contents 15-20%
Coloured transfer layer coating constitutes and can select for use stock chart as follows respectively:
| Coloured transfer layer coating constitutes | Can select raw material for use respectively |
| Colouring agent | The organic pigment of no imbibition or inorganic pigment |
| Pigment dispersing agent | Surfactant, glycerine such as peregal (polyoxyethylene aliphatic alcohol ether), polyoxyethylene nonylphenol ether (Triton X-100), Sodium Polyacrylate, Qu Latong, stearate, Tween-80. |
| The transfer membrane material | Water-soluble resin, synthetic rubber resin and emulsion thereof, wax class: palm wax, insect wax, montan wax, synthetic wax, paraffin, ceresine, sugarcane wax and decomposition high carbon chain hydrochlorate thereof, higher alcohols or emulsified body, rosin, terpene resin, CMC (carboxymethyl cellulose), CMS (CMS) |
| Fungusproof anti-corrosion agent | BCM (the different imidazoles amido of benzene methyl formate), Sodium Benzoate, formaldehyde |
| Defoamer | Butanols, octanol, tbp |
Intermediate isolating coating coating weight is 2-5g/m
2, coloured transfer layer coating coating weight is 1-2.5g/m
2
Utilize this method can produce versicolor dry carbon paper,, also can be made into sheet formula, roll type and the punching folding paper product of various sizes as black, blue, black blue, green, red, purple and palm fibre etc.
Major advantage of the present invention is: it is low to remove cost, easy to use, steady quality can be outer, dry carbon paper of the present invention and existing carbon paper, carbon element carbon paper, homemade NCR, the P.S.I.P magic paper contrast of import NCR and Germany, its comprehensive quality index all is better than above-mentioned like product (seeing that 1-4 is for carbon paper quality contrast test data), particularly have pollute little, writing definition height, light resistance is good, the writing of manifolding has good anti-water, anti-organic solvent, bleach-resistant, anti-oxidant, the anti-wiping, antiacid alkali, the archives of anti-sweat stain, anti-counterfeiting performance; Can be made into the various sizes of sheet, also can be made into the product of roll type or punching folding paper, can be made into multiple color as requested, as colors such as black, blue, black blue, purple, red, green, palm fibres, be used for ticket, document, form, statistical form, figure message printing, official document and write down and do not need again liner carbon paper can obtain many parts to copy clearly.
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1: dry carbon paper structure cutaway view;
Fig. 2: dry carbon paper process chart.
Embodiment 1:
The dry carbon paper (see figure 1) is made of body paper 3, an isolation dope layer 2 and coloured transfer coatings layer 1, be coated with one deck intermediate isolating coating 2 of isolation and adhesive effect in the one side of body paper 3, be coated with the coloured transfer coatings 1 of one deck on intermediate isolating dope layer 2, Fig. 2 is seen in the dry carbon paper technological process.
The intermediate isolating coating formula is:
100 parts of odium stearate (dry measure) (weight, as follows)
Converted starch (dry measure) 5-60 part
The serial 0.5-2 part of polyoxyethylene nonylphenol ether (Triton X-100)
Formaldehyde (concentration 36%) 0.5-2 part
Lauxite initial reduced body (dry measure) 0-2 part
Sodium Benzoate 0-2 part
Pthalocyanine blue pigment (dry measure) 0.1-0.3 part
Butanols 0.5-1 part
Water is adjusted to solid contents to 8-15%
Intermediate isolating coating preparation method is:
Odium stearate be with stearic acid and monovalence alkaline matter such as NaOH by mole ratio 1: 1, adding water, to make concentration be 20%, is warmed to 98-99 ℃, saponification 30 minutes is standby.
Converted starch employing oxidized starch or hydroxypropul starch, phosphate ester starch, the viscosity of using starch for well, is measured under 25 ℃ of conditions with No. 4 paint cups about 20 seconds with 20% concentration, starch adds 80% water and stirs and be warming up to 98 ℃, do not have insoluble matter to liquid-transparent till.Cool off standby.
Emulsifying agent can be used OP (Triton X-100) series, and it is standby that first water is made into 20% concentration.
Plain to be made into 15% concentration aqueous solvent at 1: 1.6 standby with the formaldehyde mole ratio by urea for the Lauxite initial reduced body.
It is standby that the Sodium Benzoate water is made into 20% concentration.
Feeding sequence and condition: under 38 ℃ condition, to calculate load weighted whole water by proportioning and mix stirring 10 minutes with odium stearate, add the converted starch solution of getting ready, stir 10 minutes, add the emulsifier solution of getting ready, stirred 5 minutes, and added formaldehyde, urea-formaldehyde resin initial reduced body, Sodium Benzoate and pthalocyanine blue, stirring 3-5 minute again, poured the ball mill mill into 2 hours, discharging is filtered with 200 order nylon mesh, the coating surface foam with defoamer butanols froth breaking, can be sent into coating machine and use for a long time.
Coloured transfer layer coating formula is:
Hard wax 50-100 part (weight, as follows)
Soft wax 0-30 part
Stearic acid 0-20 part
The preceding 3 kinds of sponifiable materials of NaOH NaOH (concentration 30%) and its mole ratio are 1: 0.6
Lauxite initial reduced body 0-10 part
1.25 parts of fungusproof anti-corrosion agent BCM (the different imidazoles amido of benzene methyl formate)
Phthalocyanine blue B or BX 20-40 part
Peregal (polyoxyethylene aliphatic alcohol ether) 0.4-1 part
Tween-80 0.1-0.4 part
Water 30-80 part
Water is regulated solid matter content to 15-20%
Coloured transfer layer preparation method for coating is:
Method one: transfer membrane material hard wax 50-100, soft wax 0-30 part and stearic acid 0-20 part (title variables A) are 1: 0.6 with the mole ratio of NaOH (concentration 30%), earlier with hard wax, soft wax and stearic acid (variables A) are warmed up to 200 ℃, the NaOH aqueous solution that adds amount of calculation concentration 30% several times, continuous stirring reaction, after adding, be warmed up to 220 ℃, reacted about 20 minutes, be cooled to 110 ℃, add boiling water and regulate solids content, boil and stirred about one hour to 15-20%, waiting not have particle exists, all become till the uniform liquid, under agitation be cooled to 30 ℃, add variable B (preparation of variable B is seen below), stirred 15 minutes, add Lauxite initial reduced body 0-10 part again, stirred about 10 minutes, discharging is filtered standby with 200 mesh sieves.
The preparation method of variable B is: add peregal 0.4-1 part, Tween-80 0.1-0.4 part by proportioning in 30-80 part water, adding phthalocyanine blue B 20-40 part by proportioning again after stirring stirs, carry out sand milling or ball milling then, reach the 0.2-2 micron until the pigment fineness and get final product.
Method two: be with the difference of method one: variables A and water are boiled the dissolving back jointly added the NaOH stirring reaction 1.5-2 hour by proportioning, concentration is controlled at 15-20%, is cooled to 30 ℃, and addition of variable B stirred 10-15 minute, and is standby with the filtration of 200 mesh sieves.
Body paper is best with special dedicated paper, general high-quality writing paper, offset paper, carbonless copying body paper, and the carbon element duplicating original paper, India paper and thin typographic printing paper also can use.
Utilize scraper drying cylinder hot air type coating machine to be coated with intermediate layer coating earlier in the one side of body paper, carry out press polish with seven roller supercalenderings again, smoothness reaches that (calendaring technology is consulted pulping and paper-making handbook the 11st fascicle converted paper more than 200 seconds after the coated face press polish, in March, 1988 version), the intermediate layer coating coating weight is 2-5g/m
2(absorb speed by paper and determine coating weight), 25 ℃ of coating temperature are coated with coloured transfer layer coating at last on intermediate layer coating, and coating weight is 1-2.5g/m
2, the coating temperature is 30 ℃, becomes paper water content 6 ± 1%.
Two kinds of coating also can adopt air knife or intaglio plate coating process to be coated with.
Embodiment 2:
With the difference of embodiment 1 be:
1, intermediate isolating coating proportioning:
100 parts of odium stearate (dry measure) (weight, as follows)
7 parts of EVA (polyethylene and vinyl acetate copolymer) emulsions
20 parts of lactic caseins (dry measure)
2.6 parts of ammoniacal liquor (proportion 0.91)
2 parts in urea (industrial)
20 parts of talcum powder
1 part of paregal O (polyoxyethylene aliphatic alcohol ether) (industrial)
0.125 part of BCM (the different imidazoles amido of benzene methyl formate) fungusproof anti-corrosion agent
0.2 part of carbon black (dry measure)
Octanol 1-1.5 part
Water is adjusted solid contents to 8-15%
2, intermediate isolating coating preparation method:
The odium stearate preparation is with embodiment 1, under 35 ℃ of conditions, add lactic casein solution, stirred about 10 minutes, add paregal O (polyoxyethylene aliphatic alcohol ether) by proportioning successively while stirring, BCM fungusproof anti-corrosion agent (the different imidazoles amido of benzene methyl formate), carbon black and talcum powder, add the back and continue to stir discharging in about 10 minutes, release grinding machine ball milling, discharging is filtered with 200 order nylon mesh, add EVA emulsion (polyethylene and vinyl acetate copolymer) emulsion at last, add and fashionablely regulate pH value to 8-9 with ammoniacal liquor, stir, the coating surface foam is used the octanol froth breaking for a long time, stir, send coating machine to use.
The preparation of lactic casein solution is: add cold water by proportioning and add lactic casein while stirring in mixer, stirred 3-5 minute, left standstill then 30 minutes, add ammoniacal liquor when starting mixer and being warming up to 40-50 ℃, continue to stir and be warming up to 80 ℃, add urea and continue to be stirred to till whole dissolvings, be cooled to 35 ℃ standby.
3, coloured transfer layer coating formula:
100 parts of montan waxes (weight, as follows)
60 parts in paraffin
40 parts of stearic acid
30 parts of NaOH NaOH (concentration 30%)
1100 parts in water
24 parts of carbon blacks
0.1 part of NaOH NaOH (concentration 30%)
0.28 part of polyoxyethylene nonylphenol ether (Triton X-100)
0.7 part of glycerine
1 part of Sodium Benzoate
76 parts in water
(30%) 10 part of Lauxite initial reduced body
Water is adjusted solid contents to 15-20%
4, coloured transfer layer preparation method for coating:
Earlier 1100 parts in water, 100 parts of montan waxes, 60 parts in paraffin, 40 parts of inputs of stearic acid are taken back the reaction pot heating of stream device by proportioning, after treating that wax all dissolves, add 30 parts of saponification of NaOH (concentration 30%), temperature remained on 98-100 ℃ of stirring reaction 2 hours, and it is standby to reduce to normal temperature then.To deceive and send into the ball mill ball milling 12 hours after 76 parts in 24 parts in carbon, 0.1 part of NaOH (concentration 30%), 0.28 part of polyoxyethylene nonylphenol ether (Triton X-100), 0.7 part of glycerine, 1 part of Sodium Benzoate, water mix by proportioning, add the front again and reduced to the material of normal temperature and Lauxite initial reduced body ball milling 2 hours, discharging is filtered with 200 mesh sieves, and it is standby to 15-20% that water is adjusted solid contents.
Embodiment 3:
With the difference of embodiment 1 be:
1, intermediate layer coating proportioning:
100 parts of odium stearate (dry measure) (weight, together following)
1 part of containing hydrogen silicone oil
500 parts of ethanol
0.5 part of emulsifying agent TX-10 (APES)
Ethanol is adjusted to solid contents below 16%
2, intermediate layer coating preparation method:
Odium stearate preparation is by stearic acid and monovalence or be converted to the alkaline matter mole ratio of monovalence, got 1: 1, in being arranged, the airtight stirring reaction pot of reflux condensate device carries out, earlier ethanol and stearic acid are dropped into reaction pot in proportion, after the heating for dissolving, the concentration that adding is dissolved with ethanol is 10% NaOH, kept boiling reaction one hour, be cooled to 60 ℃, add containing hydrogen silicone oil, TX-10 emulsifying agent and ethanol while stirring, it is following standby to adjust solids coatings to 16% with ethanol, and heating for dissolving is sent coating machine during use.
3, coloured transfer layer coating formula:
120 parts of palm waxs (weight, as follows)
60 parts in ceresine
20 parts of stearic acid
24 parts of potassium hydroxide KOH (concentration 30%)
1100 parts in water
808 bright red 60 parts
1 part of paregal O (polyoxyethylene aliphatic alcohol ether)
0.5 part of Qu Latong
3.6 parts of glycerine
0.29 part of fungusproof anti-corrosion agent BCM (the different imidazoles amido of benzene methyl formate)
140 parts in water
4, coloured transfer layer coating compounding method
Earlier 120 parts of palm waxs, 60 parts in ceresine, 20 parts of stearic acid and 1100 parts of inputs of water are taken back the reaction pot heating of stream device by proportioning, after treating that wax all dissolves, add 24 parts of saponification of KOH (concentration 30%), temperature remained on 98-100 ℃ of stirring reaction 2 hours, and it is standby to reduce to normal temperature then.Sent into the ball mill ball milling 12 hours after 140 parts of 808 bright red 60 parts, 1 part of paregal O, 0.5 part of Qu Latong, 3.6 parts of glycerine, 0.29 part of fungusproof anti-corrosion agent BCM (the different imidazoles amido of benzene methyl formate), water are mixed by proportioning, add aforementioned material of reducing to normal temperature again and ground 2 hours, discharging is filtered standby with 200 mesh sieves.
Claims (13)
1, dry carbon paper, it is characterized in that: constitute for three layers by body paper, intermediate isolating dope layer and coloured transfer coatings layer, the one side of body paper has been coated with one deck intermediate isolating coating of isolation and adhesive effect, on the intermediate isolating dope layer, be coated with the coloured transfer coatings of one deck, it is characterized in that: the intermediate isolating coating formula comprises:
Isolate 100 parts of antitack agents (weight, as follows)
Bonding, film forming agent 5-60 part
Colouring agent 0.1-1 part
Emulsification wetting agent 0.5-3 part
Fungusproof anti-corrosion agent 0.1-4 part
Water is adjusted to solid contents 8-15% wherein: isolating antitack agent is odium stearate
Being bonded into film is: one or more in converted starch, polyethylene and vinyl acetate copolymer, the lactic casein.
Coloured transfer layer coating formula:
Colouring agent 10-40 part (weight, as follows)
Pigment dispersing agent 0.5-8 part
100 parts of transfer membrane materials
Fungusproof anti-corrosion agent 0.1-3 part
Water is adjusted to solid contents 15-20%
Wherein the transfer membrane material is the mixture of one or more and NaOH or potassium hydroxide in wax, Lauxite initial reduced body, the stearic acid.
2, according to the described dry carbon paper of claim 1, it is characterized in that: also comprise the filler powder that is selected from titanium dioxide, talcum powder, kaolin, calcium carbonate in the intermediate isolating coating formula, its consumption is 0-50 part.
3, according to the described dry carbon paper of claim 1, it is characterized in that: also comprise in the alkaline matter that is selected from NaOH, sodium carbonate, ammoniacal liquor, potassium hydroxide, borax, ethylenediamine one or more in the intermediate isolating coating formula, its consumption is 0-70 part.
4, according to the described dry carbon paper of claim 1, it is characterized in that: the emulsification wetting agent in the intermediate isolating coating formula is: Triton X-100 or polyoxyethylene aliphatic alcohol ether.
5, according to the described dry carbon paper of claim 1, it is characterized in that: also comprise the Lauxite initial reduced body that is made into 15% concentration with urea and formaldehyde mole ratio at 1: 1.6 in the intermediate isolating coating formula, its consumption is 0-2 part (dry measure).
6, according to the described dry carbon paper of claim 1, it is characterized in that: comprise also in the intermediate isolating coating formula that defoamer butanols, its consumption are 0.5-1 part or octanol, its consumption is 1-1.5 part.
7, according to the described dry carbon paper of claim 1, it is characterized in that: also comprise defoamer octanol, butanols or tbp in coloured transfer coatings proportioning, its consumption is 1-3 part.
8, according to the described dry carbon paper of claim 1, it is characterized in that: the wax in coloured transfer coatings proportioning is selected from one or more in palm wax, montan wax, paraffin, the ceresine.
9, according to the described dry carbon paper of claim 1, it is characterized in that: pigment dispersing agent is selected one or more among polyoxyethylene aliphatic alcohol ether, Tween 80, NaOH, Triton X-100, glycerine, the Qu Latong for use.
10, according to the described dry carbon paper of claim 1, it is characterized in that: also comprise the Lauxite initial reduced body that is made into 15% concentration with urea and formaldehyde mole ratio at 1: 1.6 in coloured transfer coatings proportioning, its consumption is 0-10 part.
11, according to any described dry carbon paper among the claim 1-10, it is characterized in that: intermediate isolating coating coating weight is 2-5g/m
2, coloured transfer coatings coating weight is 1-2.5g/m
2
12, according to the production method of any described dry carbon paper among the claim 1-10, it is characterized in that: utilize coating machine to be coated with one deck intermediate isolating coating earlier in the body paper one side, again coloured transfer coatings is coated with one deck on the intermediate isolating dope layer, then polishing.
13, according to the described dry carbon paper of claim 12, it is characterized in that: utilize coating machine after body paper simultaneously is coated with the intermediate isolating dope layer, use earlier the calender press polish, on the intermediate isolating dope layer, be coated with the coloured transfer layer coating of one deck with coating machine again, at last polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111474 CN1038239C (en) | 1994-10-27 | 1994-10-27 | Dry carbon paper and productive method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111474 CN1038239C (en) | 1994-10-27 | 1994-10-27 | Dry carbon paper and productive method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1109824A CN1109824A (en) | 1995-10-11 |
| CN1038239C true CN1038239C (en) | 1998-05-06 |
Family
ID=5035341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94111474 Expired - Lifetime CN1038239C (en) | 1994-10-27 | 1994-10-27 | Dry carbon paper and productive method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038239C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230304B (en) * | 2010-09-27 | 2015-02-04 | 宁波鸿运纸业有限公司 | Preparation method for dry-type carbon paper |
| CN102619136B (en) * | 2012-04-18 | 2014-06-11 | 金华盛纸业（苏州工业园区）有限公司 | Carbonless copy paper |
| CN105133419A (en) * | 2015-09-06 | 2015-12-09 | 安徽金亿禾特种纸有限公司 | Waterproof carbon paper |
| CN105239452A (en) * | 2015-09-06 | 2016-01-13 | 安徽金亿禾特种纸有限公司 | Production process of carbon paper |
| CN105133425A (en) * | 2015-09-06 | 2015-12-09 | 安徽金亿禾特种纸有限公司 | Low-toxicity carbonless copy paper coating line |
| CN108035185A (en) * | 2018-01-15 | 2018-05-15 | 上海室兰实业有限公司 | A kind of water-based mould release of thermoprint and preparation method thereof |
-
1994
- 1994-10-27 CN CN 94111474 patent/CN1038239C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1109824A (en) | 1995-10-11 |
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Expiration termination date: 20141027 Granted publication date: 19980506 |