CN87101841A - The protection glue and the compound method of offset plate material - Google Patents
The protection glue and the compound method of offset plate material Download PDFInfo
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- CN87101841A CN87101841A CN198787101841A CN87101841A CN87101841A CN 87101841 A CN87101841 A CN 87101841A CN 198787101841 A CN198787101841 A CN 198787101841A CN 87101841 A CN87101841 A CN 87101841A CN 87101841 A CN87101841 A CN 87101841A
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Abstract
The present invention is a kind of protection liquid and compound method of offset plate material.Be applicable to printing industry.The protection glue of offset plate material is the active polyacrylamide, thickener-No. 1 of the active polyacrylamide that contains nonionic, anionic, the colloidal solution of dextrin or mosanom, sodium hydrogen phosphate, magnesium nitrate.Can be used as the protective agent of offset plate material, also can be made into Bailer liquid and ink-lifting agent.It can be the same with gum arabic, plays protection plate and the non-image stabilization of protection offset printing, and also be better than gum arabic on some performance.
Description
The present invention is a kind of protection liquid of offset plate material and the invention of compound method and application thereof.Offset plate material protection glue of the present invention is applicable in the printing industry.
In lithographic printing, use certain density gum arabic solution, be coated on exposure, on the space of a whole page after the development, after the drying, it forms the hard-packed film of one deck.This layer film can prevent the effect of space of a whole page oxidation and protection printing.Therefore, use certain density gum arabic solution, preparation plate protection liquid.Also can be made into Bailer liquid.So gum arabic is one of must indispensable raw material in the lithographic printing.But, because gum arabic is natural products, impure many, quality is unstable.Again because in press, it is used in when keeping non-image hydrophily in the bucket solution, the tendency of ink emulsification is arranged.Undue emulsification makes the image resolution lines of printing meticulous, causes on the plate dirty and printing ink demoulding from the ink roller.Therefore, people are seeking the sub of gum arabic for a long time.
In the past, someone advises with the substitute of some compositions as gum arabic, be used to process the printing plate that has image, homopolymers and copolymer as oxalic acid, itaconicacid, sodium carboxymethylcellulose, the copolymer of ethylene methacrylic ether and maleic anhydride, polyacrylic acid and its sodium or ammonium salt, alginic acid and its sodium salt and acid polyethylene etc.But in these substituents that proposed, do not have a kind of can dominating the game, and be used in the actual production commercial.
Propose in the patent of the US4214531 of the U.S. to replace gum arabic, be used for lithographic printing with the aqueous solution of active polyacrylamide and polyacrylic acid and its esters.Because the operation concentration of this glue is bigger, and is not easy to operate during coating, but also can spare by crawling; And in lithographic printing, can only play protectant effect, and can not in press prevent dirty phenomenon.
Protection glue and its compound method of the purpose of this invention is to provide a kind of offset plate material.With the protection glue of the offset plate material that compound method of the present invention was mixed with, can replace gum arabic, but also be better than the glue that US4214531 proposed of the U.S..Offset plate material protection glue of the present invention not only can be used as the protective agent of plate, but also can be used to prepare bucket solution and ink-lifting agent etc.
Offset plate material protection glue is by the active polyacrylamide that contains nonionic (PAM); the active polyacrylamide of anionic (PHP), the colloidal solution of thick dose of-No. 1 (Main Ingredients and Appearance is a Sodium Polyacrylate), dextrin or mosanom, sodium hydrogen phosphate, magnesium nitrate.The scope of each component is in the offset plate material protection liquid:
Active PAM 2%～4%(weight of A nonionic)
Active polyacrylamide 1.04%～1.78%(weight of B anionic)
C Sodium Polyacrylate (thickener-No. 1 in Main Ingredients and Appearance) 1.30%～2.5%(weight)
D dextrin 0.125%～0.25%(weight)
Or mosanom 0.07%～0.14%(weight)
Or dextrin, mosanom, wherein dextrin 0.125%～0.25%(weight),
Mosanom 0.07%～0.14%(weight)
F sodium hydrogen phosphate 0.07%～0.15%(weight)
E magnesium nitrate 0.12%～0.25%(weight)
G water 90.93%～95.275%(weight)
Total component is a 100%(weight)
Transferring the pH value of the glue of being made up of above-mentioned each component with acid again is 4.0～5.0.This glue is an offset plate material protection glue of the present invention.
To offset plate material protection glue of the present invention, be described in detail below.
Active polyacrylamide in the offset plate material protection glue is to add polyacrylic acid or other soluble-salt in the solution of polyacrylamide.Make the carboxyl that proper proportion is arranged on the polyacrylamide amine molecule with Hydrolyze method.Wherein on the carbonyl position 10%～50%, carboxyl, remainder amide groups balance.Active polyacrylamide can play the hydrophily effect.The present invention has adopted the mixed liquor of active polyacrylamide anionic (PHP) and nonionic (PAM).It can take into account both performances and characteristics like this, can make the proportion of composing of solution stable again.The mean molecule quantity of the active polyacrylamide of anionic and nonionic ionic is 200,000～500,000.
Thickener-No. 1 in the offset plate material protection glue.Be to be the thickener of Main Ingredients and Appearance with the Sodium Polyacrylate.In offset plate material protection glue, add this be the thickener of Main Ingredients and Appearance with the Sodium Polyacrylate after, can make glue under lower concentration, can reach required viscosity, play the effect of protection offset plate material.Make offset plate material protect the operation concentration of glue to be lower than the concentration of institute's obtain solution in traditional gum arabic and the US4214532 patent.When coating, not only operation easily, but also striped can not appear, make can be coated with aborning evenly.The thickener that with the Sodium Polyacrylate is Main Ingredients and Appearance is that the Sodium Polyacrylate by three kinds of different mean molecule quantities is that the thickener-1 of Main Ingredients and Appearance number mixes and to generate, be thickener-No. 1 (model-20), thickener-No. 1 (model 23), thickener-No. 1 (model 27) mixes and generates.The mean molecule quantity of Sodium Polyacrylate is respectively 200,000 in these three kinds of model thickeners, and 230,000,270,000.The polyacrylic acid sodium content that No. one, used thickener is 20%～30%(weight) Sodium Polyacrylate of these the three kinds of different mean molecule quantities weight ratio in offset plate material protection glue is: mean molecule quantity is 200,000 Sodium Polyacrylate: mean molecule quantity is 230,000 Sodium Polyacrylate: mean molecule quantity is 270,000 a Sodium Polyacrylate=1: 2.5: 1.
Offset plate material is protected dextrin or the mosanom in the glue, can increase the hydrophily of glue, makes offset plate material protection glue reach best hydrophilic effect.
Sodium hydrogen phosphate, magnesium nitrate in the offset plate material protection glue are a kind of desensitization medicaments, and they play the protective agent effect in glue, can also when particularly printing begins, make plate keep the space of a whole page of cleaning in printing process simultaneously.
With acid the pH value of offset plate material protection glue is transferred to 4.0～5.0, optimum range is 4.2～4.6.Make glue be faintly acid, little to plate corrosivity.In order to make offset plate material protection glue can play better anti-dirty effect, during the acid number of adhesive transfer, preferably use phosphoric acid.
In offset plate material protection glue, the active polyacrylamide of anionic and nonionic, and Sodium Polyacrylate, every kind mean molecule quantity are all between 200,000～500,000.Mean molecule quantity is in this scope, and glue is prevented dirty and the protection best results.
Offset plate material protection glue is to adopt following process formulated.The thickener-1 of the active polyacrylamide solution of nonionic and anionic and the Sodium Polyacrylate that contains three kinds of different mean molecule quantities number, i.e. model-20, model-23, model-27, is evenly mixed in a container according to certain proportional quantity blending.Use another container again, dextrin (or mosanom), sodium hydrogen phosphate, magnesium nitrate is measured according to a certain ratio and is dissolved in the water, then this mixed solution again with previous container in mixed solution evenly mix and water dilution, make each component reach desired content, use the pH value of sour adhesive transfer again.Obtain offset plate material protection glue of the present invention.
Offset plate material protection glue can be used as the protective agent of offset plate material, is widely used in the printing industry.Use offset plate material protection glue to be coated on exposure, on the space of a whole page after the development, also can form the hard-packed film of one deck, can prevent the effect of space of a whole page oxidation and protection plate.Offset plate material protection glue can also be used to prepare bucket solution and ink-lifting agent etc.
Can replace gum arabic fully with offset plate material protection glue.The stability that its physicochemical property had, water-soluble, hydrophily, grease resistance and all identical with gum arabic to the corrosivity of plate.Can be the same with gum arabic, play protection plate and the non-image stable effect of protection offset printing.Its operation concentration is lower than the gum arabic and the U.S..The operation concentration of the glue that proposes in the US4214531 patent.
Offset plate material protection glue can also be used for preparing bucket solution.In the offset printing operation, contact with offset plate material with bucket solution, to keep non-image ability that receives water (or hydrophilic) of plate.For many years, the Main Ingredients and Appearance of bucket solution is a gum arabic, the Bailer liquid that bichromate and phosphoric acid etc. are acid.Yet in use have many drawbacks.As: the gloss that can reduce printing-ink on bottom.Can cause that offset printing roller becomes smooth, even last demoulding; Make responsive, the easily oxidation etc. that becomes of non-image face.If use alcohol (ethanol, isopropyl alcohol etc.) as Bailer liquid, it can produce alcohol separates plastic emitting from bucket solution tendency, often causes losing problems such as printing quality.Use the neutral Bailer liquid of offset plate material protection glue of the present invention, can overcome with above-mentioned acidity or the more caused problems of alkaline Bailer liquid as Main Ingredients and Appearance.
With the neutral Bailer liquid of offset plate material protection glue as Main Ingredients and Appearance, used prescription is:
| Form | Proportioning |
| The protection glue of offset printing | 300 milliliters～500 milliliters |
| Ethylenediamine tetra-acetic acid (disodium) (adding in 200 ml ethanols) | 40～50 grams |
| Sodium hydrogen phosphate | 200～250 grams |
| Sodium pyrophosphate | 130～150 grams |
| Detergent for ink | 40～50 milliliters |
| Phosphoric acid (85%) | 100 milliliters |
| Water | 9150～9360 milliliters |
Be offset plate material protection glue, be dissolved with alcohol, detergent for ink, phosphoric acid (85%), the water of ethylenediamine tetra-acetic acid (disodium), by volume: 30～50: 20: 4～5: 10: 915～936, evenly mix; And ethylenediamine tetra-acetic acid (disodium) concentration in solution is 0.4%～0.5%(weight); Add the phosphoric acid disodium hydrogen again, making it concentration is 2%～2.5%(weight); Sodium pyrophosphate, making it concentration is 1.3%～1.5%(weight).Promptly be made into neutral Bailer liquid.
In use, above-mentioned be made into neutral Bailer liquid and water in 1: 10 ratio towards rare, can use after stirring.
Use offset plate material protection glue to prepare neutral bucket solution, avoided the shortcoming of or alkaline bucket solution acid with gum arabic.Because it is emulsified that it is difficult for, thereby help improving offset quality.
Use offset plate material protection glue can be made into ink-lifting agent, use before the offset printing four-color process is started shooting, its effect comes China ink fast, saves time, and behind adjustment of the printing plate, after 2～3 adjustment lay marks, can start to print.
Offset plate material protection glue of the present invention in a word can equally play protection plate and the non-image stable effect of protection offset printing with gum arabic, and its operation concentration is lower than the operation concentration of the glue that proposes in gum arabic and the U.S. US4214531 patent.Use offset plate material protection glue of the present invention can be mixed with neutral Bailer liquid, serial soup such as ink-lifting agent.Offset plate material protection glue does not have the sort of stink of gum arabic, therefore need not anticorrisive agent.Easy to use, can improve working environment.The raw material sources of offset plate material protection glue are very abundant, easy to make, not only can replace gum arabic, and on performance, be better than gum arabic on the purposes, also are better than the glue that proposes in the U.S. US421453 patent.
Embodiment 1
Use compound method proposed by the invention, be mixed with the offset plate material protection glue of three kinds of variable concentrations, fill a prescription as follows for glue (1), glue (2), (3) three kinds of glues of glue:
(notes) as the solution of the Sodium Polyacrylate (20%) of thickener, and the Sodium Polyacrylate mean molecule quantity in three kinds of model～20～23～27 solution is respectively 200,000,230,000,270,000.It all is the product of Beijing chemical industry two factories.Transferring pH value with acid is 4～5.The concentration of each component is in the glue of being prepared 1, glue 2,3 three kinds of glues of glue:
The offset plate material of above-mentioned three kinds of variable concentrations protection glue, gluing is tested on plate.Use 12 exposures, the PS plate after the development is of a size of 60 * 80(mm)
2The glue of every kind of concentration is coated with four, place 24,48,72,96 hours respectively after, water removes glue, coats offset ink, dirty situation in the inspection.
Assay certificate: dirty on eight none pieces of PS plate of glue (1), (2) placement different time, result of use is good.And the gelatin concentration of glue (3) is rare excessively, does not play a protective role, and the dirty phenomenon of going up is arranged.
Embodiment 2
Use polyacrylamide, thickener-No. 1, dextrin and mosanom, water are prepared eight kinds of solution respectively.At first:
1, by following concentration preparation glue, the polyacrylamide of nonionic
3.0%(weight),
The polyacrylamide of anionic
1.40%(weight),
Sodium Polyacrylate (thickener-No. 1 Main Ingredients and Appearance)
1.60%(weight),
Water
94%(weight),
Total consists of
100%(weight),
Transferring pH value with acid again is 4～5, is called stoste.
2, get 10 gram dextrin and be dissolved in the 490 gram warm water, be made into 2% dextrin solution.
3, get 5 gram mosanoms and be dissolved in the 495 gram warm water (can add some alcohol in right amount), be made into 1% solution of sodium alginate.
Be made into eight kinds of solution again with top three kinds of solution then, code name is 1
#To 8
#
1
#, stoste.
2
#, get 120 milliliters of stostes, add 20 milliliter 1% mosanom.Mosanom concentration in solution is 0.14%(weight).
3
#, get 120 milliliters of stostes, add 40 milliliter 1% mosanom.Mosanom concentration in solution is 0.25%(weight).
4
#, 1% solution of sodium alginate.
5
#, get 120 milliliters stoste, add 10 milliliter 2% dextrin.Dextrin concentration in solution is 0.125%(weight).
6
#, get 120 milliliters stoste, add 20 milliliter 2% dextrin.Dextrin concentration in solution is 0.25%(weight).
7
#, 2% dextrin solution.
8
#, get 120 milliliters stoste, add 10 milliliter 1% mosanom and 10 milliliter 2% dextrin solution.The concentration of mosanom in solution is 0.07%(weight).Concentration in dextrin and the solution is 0.14%(weight).
Above-mentioned eight kinds of glues are coated on exposure respectively, and on the PS version after the development, every kind is coated with two placements and tries upward dirty situation of each edition after 24,48 hours.Through assay certificate:
1
#, better.On inspection, the space of a whole page removes 1
#Glue, non-image of last China ink back is difficult for going up dirty.
2
#, 5
#, 6
#, 8
#Good.On inspection, the space of a whole page removes 2 respectively
#, 5
#, 6
#, 8
#Glue, non-image of last China ink back is substantially whether go up dirty.
3
#Poor slightly.On inspection, the space of a whole page removes 3
#Glue, the non-image face in last China ink back has the dirty phenomenon of going up slightly.
4
#, 7
#Difference.On inspection, the space of a whole page removes 4
#, 7
#Glue, non-image of last China ink back is easily gone up dirty.
Pure solution of sodium alginate and pure dextrin solution are described, all can not be as the protection liquid of offset plate material.The protection liquid of offset plate material must have stoste, and adds the effective of a certain amount of dextrin or mosanom in stoste.3
#The poor slightly reason of glue effect is that Sodium Polyacrylate (Main Ingredients and Appearance that No., thickener) is on the low side, and mosanom concentration is higher.
Embodiment 3
Prepare two kinds of different glues, glue 1, glue 2.
Glue 1, according to the stoste among the embodiment 2 preparation glue.
The active polyacrylamide 3% of glue 2, nonionic
The active polyacrylamide 1.4% of anionic
Sodium Polyacrylate (thickener-No. 1 in Main Ingredients and Appearance) 1.6%
Dextrin 0.20%
Sodium hydrogen phosphate 0.1%
Magnesium nitrate 0.25%
Water 93.45%
Total component is 100%
Transfer pH value to 4～5 with acid.
Two parts of glues that prepare be coated in four exposures respectively, on the PS plate after developing, place after 24,48 hours, detect their anti-dirty situation: remove respectively after the glue 1,2, place and went up China ink in 1,2 hour later on again, find that glue 1 after placing 2 hours, has the dirty phenomenon of going up, and that glue 2 does not occur is dirty, glue 2 is described within a certain period of time, still keeps anti-dirty performance.The dextrin of explanation in the protection glue of offset plate material, sodium hydrogen phosphate, magnesium nitrate can significantly improve anti-dirty performance.
Claims (7)
1, a kind of protection glue of offset plate material; be active polyacrylamide, thickener-No. 1 (Main Ingredients and Appearance is a Sodium Polyacrylate), dextrin or mosanom, the sodium hydrogen phosphate of the active polyacrylamide that contains nonionic, anionic, the colloidal solution of magnesium nitrate, it is characterized in that the scope of each component is:
The active polyacrylamide 2%～4% (weight) of A nonionic
The active polyacrylamide 1.04%～1.78% (weight) of B anionic
C Sodium Polyacrylate (thickener-No. 1 in Main Ingredients and Appearance) 1.30%～2.5% (weight)
D dextrin 0.125%～0.25% (weight)
Or mosanom 0.07%～0.14% (weight)
Or dextrin, mosanom, wherein: dextrin 0.125%～0.25% (weight)
Mosanom 0.07%～0.14% (weight)
F sodium hydrogen phosphate 0.07%～0.15% (weight)
E magnesium nitrate 0.12%～0.25% (weight)
G water 90.93%～95.275% (weight)
Total component is 100% (weight), and the pH value of glue is 4.0～5.0.
2, the protection glue of a kind of offset plate material according to claim 1; the active polyacrylamide that it is characterized in that anionic and nonionic; in its molecule on the carbonyl position 10%～50%, carboxyl, remainder amide groups balance, and mean molecule quantity is 200,000～500,000.
3, the protection glue of a kind of offset plate material according to claim 1 and 2; it is characterized in that thickener-No. 1 (Main Ingredients and Appearance is a Sodium Polyacrylate); be by model-20; model-23, the thickener-1 of model-27 3 kind of model number mixes and generates; the mean molecule quantity of Sodium Polyacrylate is respectively 200,000 in the thickener of three kinds of models; 230,000,270,000, the weight ratio in glue is 1: 2.5: 1.
4, the protection glue of a kind of offset plate material according to claim 3 is characterized in that transferring pH value with phosphoric acid is 4.2～4.6.
5; a kind of compound method of offset plate material protection glue; the active polyacrylamide solution of nonionic and anionic and three kinds of thickeners-No. 1; it is model-20; model-23; model-27; according to certain proportional quantity blending in container; evenly mix; use another container dextrin (or mosanom) again; the sodium hydrogen phosphate magnesium nitrate is measured according to a certain ratio and is dissolved in the water; then this mixed solution again with previous container in mixed solution evenly mix; and dilute with water makes each component reach desired content, uses the pH value of sour adhesive transfer again, promptly obtains offset plate material protection glue.
6, the protection glue of a kind of offset plate material according to claim 4 is characterized in that using on the space of a whole page after offset plate material protection glue is coated on exposure, development, as the protective agent of offset plate material.
7; the protection glue of a kind of offset plate material according to claim 4; it is characterized in that offset plate material protection glue can be used to prepare neutral bucket solution; offset plate material protection glue; be dissolved with the alcohol of ethylenediamine tetra-acetic acid (disodium); detergent for ink; phosphoric acid (85%); water; by volume: 30～50: 20: 4～5: 10: 915-936 evenly mixed; and ethylenediamine tetra-acetic acid (disodium) concentration in solution is 0.4%～0.5%(weight); add sodium hydrogen phosphate again; making it concentration is 2%～2.5%(weight); sodium pyrophosphate; making it concentration is 1.3%～1.5%(weight), promptly be made into neutral Bailer liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198787101841A CN87101841A (en) | 1987-03-14 | 1987-03-14 | The protection glue and the compound method of offset plate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198787101841A CN87101841A (en) | 1987-03-14 | 1987-03-14 | The protection glue and the compound method of offset plate material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87101841A true CN87101841A (en) | 1987-09-16 |
Family
ID=4813650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198787101841A Pending CN87101841A (en) | 1987-03-14 | 1987-03-14 | The protection glue and the compound method of offset plate material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87101841A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103802522A (en) * | 2014-01-16 | 2014-05-21 | 合肥环照高分子材料厂 | Environment-friendly fountain solution containing aloe extract and preparation method of environment-friendly fountain solution |
| CN109263338A (en) * | 2017-07-17 | 2019-01-25 | 乐凯华光印刷科技有限公司 | One kind is exempted to handle temperature-sensitive version and preparation method thereof in machine development |
-
1987
- 1987-03-14 CN CN198787101841A patent/CN87101841A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103802522A (en) * | 2014-01-16 | 2014-05-21 | 合肥环照高分子材料厂 | Environment-friendly fountain solution containing aloe extract and preparation method of environment-friendly fountain solution |
| CN103802522B (en) * | 2014-01-16 | 2016-02-03 | 合肥环照高分子材料厂 | A kind of environmental protection fountain solution containing aloe extract and preparation method thereof |
| CN109263338A (en) * | 2017-07-17 | 2019-01-25 | 乐凯华光印刷科技有限公司 | One kind is exempted to handle temperature-sensitive version and preparation method thereof in machine development |
| CN109263338B (en) * | 2017-07-17 | 2021-09-14 | 乐凯华光印刷科技有限公司 | On-press development treatment-free thermosensitive plate and preparation method thereof |
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