CN106675191A - Printing ink for spraying code - Google Patents
Printing ink for spraying code Download PDFInfo
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- CN106675191A CN106675191A CN201510765865.1A CN201510765865A CN106675191A CN 106675191 A CN106675191 A CN 106675191A CN 201510765865 A CN201510765865 A CN 201510765865A CN 106675191 A CN106675191 A CN 106675191A
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Abstract
The invention discloses printing ink for spraying code. The printing ink is prepared from the following raw materials in mass percent: 4 to 8 percent of vinyl chloride-vinyl acetate resin, 1 to 5 percent of chlorinated polypropylene, 1 to 5 percent of rosin resin, 58 to 70 percent of butanone, 8 to 15 percent of methylbenzene, 8 to 15 percent of butyl acetate, 5 to 10 percent of solvent dye, and 0.2 to 0.5 percent of paraffin. In the printing ink, the vinyl chloride-vinyl acetate resin, the chlorinated polypropylene and the rosin resin are selected as mixed resin, and not only can form a uniform and dense ink film to improve the alcohol resistance of printing ink, but also realize good wetting on a PE substrate to improve the adhesion force of the printing ink. The butanone, the methylbenzene and the butyl acetate are selected as a mixed solvent, and can properly dissolve the mixed resin, thereby reducing the viscosity of the printing ink.
Description
Technical field
The present invention relates to technical field of ink, more particularly, to coding ink.
Background technology
With the growing interest to safety problem, existing legal provisions must indicate the explanation for date of manufacture, lot number, shelf-life etc. protecting consumers' rights and interests on the label of the products such as food, medicine, cosmetics.It is widely used in label explanation because code-spraying printing ink has a series of excellent properties such as clear writing, stable performance, scrubbing resistance.But, there is following Railway Project in existing code-spraying printing ink：1st, the alcohol resistance of existing code-spraying printing ink is still poor, and especially on the product surface for needing Jing often to clean, ink erasibility is poor, can affect the definition of product outside sign.2nd, the adhesive force on the grounds such as PVC, PE is still poor, needs separately to pre-process ground when in use, for example the treatment measures such as corona, polarization, and by improving the surface energy of ground good attachment can be realized.3rd, in the packaging in the fields such as food, medicine, cosmetics, existing code-spraying printing ink is also insufficient for the demand of environmental-protecting performance.
The content of the invention
The purpose of the present invention is the defect for overcoming above-mentioned prior art, there is provided coding ink, has the advantages that viscosity is low, adhesive force is strong, alcohol resistance good, quick-drying is suitable, stability is high.
The purpose of the present invention is achieved through the following technical solutions：
Coding ink, is obtained by the raw material of following mass fraction：It is obtained by the raw material of following mass fraction：Vinyl chloride-vinyl acetate resin 4 ~ 8%, chlorinated polypropylene 1 ~ 5%, rosin resin 1 ~ 5%, butanone 58 ~ 70%, toluene 8 ~ 15%, butyl acetate 8 ~ 15%, solvent dye 5 ~ 10%, paraffin 0.2 ~ 0.5%.
It is that and being used for frosting ink should possess first two fundamental propertys with polyethylene ground to carry object to considering for ink adhesion in the present invention：One is that ink must have good adhesive force to plastics.There is good attachment on PE grounds, the corrosion that by changing the composition of solvent PE surfaces should be made appropriate is so that it produces good wetting.Two to be that the structure of resin in ink should try one's best similar to PE.PE is a kind of non-polar polymer being crosslinked by C-H bond, former from polarity should being selected relatively small, the similar polyene compound of molecular structure according to similar compatibility.There is ink certain solvent resistant scouring performance to be primarily referred to as resistance to ethanol scouring performance, namely require that selected raw material solubility in ethanol is low or insoluble.Consider, the present invention is from vinyl chloride-vinyl acetate resin, chlorinated polypropylene as matrix resin, vinyl chloride-vinyl acetate resin be by VCM and vinyl acetate in the presence of initiator copolymerization and obtain, in the molecular structure of vinyl chloride-vinyl acetate resin, due in the embedded vinyl chloride chain of nonpolar molecule vinyl acetate, so the polarity of original molecule is reduced, so as to enhance the ability of its resistance to polar solvent dissolving.Thus vinyl chloride-vinyl acetate resin has excellent alcohol resistance, dissolution degree in ethanol is less, is relatively suitable as the matrix resin of alcohol resistance scrubbing ink.Wetability of the chlorinated polypropylene on PE grounds is preferable, and ink viscosity is relatively low by obtained in chlorinated polypropylene.But it is not eventually very strong that chlorinated polypropylene matches somebody with somebody attachment of the ink on PE, thus has also selected rosin resin to be compounded, and the good viscosity of adhesive force satisfactory High-adhesion ink again is so just obtained.Because resin is used as the major part of ink solid constituent, the impact to ink substrate adhesion plays definitely effect, thus ink adhesion increases with the increase of resin quality fraction.But based on considering to ink viscosity, the mass fraction of hybrid resin is：Vinyl chloride-vinyl acetate resin 4 ~ 8%, chlorinated polypropylene 1 ~ 5%, rosin resin 1 ~ 5%.
Solvent accounts for the overwhelming majority of ink, although solvent can volatilize after ink film, but the performance such as the immixture of the volatility of solvent, viscosity, dissolubility, the corrosivity to ground and solvent all has large effect to the adhesive force of ink.And the selection to solvent is considered as：One is that solvent can well dissolve selected resin, and the macromolecular chain in resin can be made intactly to launch.Two is that the solubility parameter of solvent and ground are closer to, by corrosive nature of the increase to ground, so that surface of bottom material generation is less swelling, in so contributing to the molecular structure that the components such as resin penetrate into surface of bottom material.Three is impact of the solvent to ink evaporation rate.Four is that selected solvent should also as far as possible embody environmental-protecting performance, low irritant smell, and volatilizees soon to ensure quick-drying.The present invention can be preferably dissolved in butanone from butanone as bulk solvent, vinyl chloride-vinyl acetate resin and chlorinated polypropylene.Meanwhile, not only film is brighter for butanone, and ink colors are more bright-coloured, and volatility is good, meets the quick-drying needed for product and requires.To obtain preferable adhesive force, while stablizing for the evaporation rate balance and holding ink when can realize printing-ink film forming, also needs to increase secondary solvent.On the basis of consideration and main solvent butanone and rosin resin compatibility,, from toluene and butyl acetate as secondary solvent, solubility of the hybrid resin in toluene is preferable, and macromolecular chain can sufficiently uniformly launch for the present invention, finer and close resin film can be formed after solvent volatile dry, film cohesive force is good.In addition, toluene is good to the corrosivity of PE grounds, when ink is sprayed at PE grounds, toluene can make it produce certain swelling action, produce certain active group, so that resin macromolecule can be embedded in PE surfaces and be anchored, increase adhesive force of the ink to ground.Butyl acetate can preferably dissolve each other with butanone, and form certain ion pair, can increase the repulsion between macromolecular chain, so that the macromolecule in ink preferably disperses, after solvent volatile dry, the ink film of even compact can be formed, thus the alcohol resistance energy of ink can be increased.With the increase of solvent ratio in ink, the adhesive force of ink is then reduced, therefore the mass fraction of butanone is controlled 58 ~ 70% in the present invention, and 8 ~ 15%, the mass fraction of butyl acetate is controlled 8 ~ 15% for the mass fraction control of toluene.
Ink colouring agent is divided into pigment and the big class of dyestuff two, compared with solvent dye, the alcohol resistance of the ink being made up of pigment is preferable, it is substantially insoluble in alcohol, but the viscosity using the made ink of pigment is too big, and dispersiveness is not so good as solvent dye, thus the present invention selects solvent dye as colouring agent.Because solvent dye is slightly soluble in alcohol, especially when its content in ink is more than 10%, alcohol resistance is gradually deteriorated；And when being less than 5%, the colourity of ink is again weaker, requirement is not reached, therefore the mass fraction of solvent dye is 5 ~ 10%.The solvent-resisting of code-spraying printing ink is closely bound up with the surface appearance of ink, and the film of surface ethanol-tolerant is thicker, and alcohol resistance is stronger, and such as in the wax powder of one layer this iris action of resin film overlying, then the alcohol resistance of ink will strengthen.Herein from paraffin as solvent resistant auxiliary agent.It is found through experiments, with the increase of paraffin content, the alcohol resistance of ink increased, but when more than 0.5%, then has insoluble matter to occur in ink.Therefore, the mass fraction of paraffin is controlled 0.2 ~ 0.5% in the present invention.
Further, the butanone, the toluene and the mass ratio of the butyl acetate are 7:1:1.It is in mixed solvent, although butanone plus membership reduction ink adhesive force but for the more single toluene solvant of the depreciation and few.Now, what both ratios more should be considered is the impact to ink viscosity.For chlorinated polypropylene, butanone is good solvent, and the dissolubility in toluene is then slightly worse；And for rosin resin, toluene is good solvent, the dissolubility in butanone is then slightly worse.Jing experiments find, when the mass ratio of butanone, toluene and butyl acetate is 7:1:When 1, the chlorinated polypropylene and rosin resin in hybrid resin can preferably dissolve with mixed solvent so that viscosity reduce, meanwhile, larger humidification also can be played to the alcohol resistance of ink.
To realize preferable combination property, further, it is obtained by the raw material of following mass fraction：Vinyl chloride-vinyl acetate resin 5%, chlorinated polypropylene 2.5%, rosin resin 2.5%, solvent dye 8%, paraffin 0.5%, balance of butanone, toluene and butyl acetate, balance of butanone and toluene.Obtained ink ethanol-tolerant of the invention can reach 6s, and viscosity 2.6cP, quick-drying E value is 5.5, and adhesive force is up to 0.24N/mm2。
Further, the chlorinated polypropylene and the mass ratio of the rosin resin are 1:1.It is found through experiments, with the increase of rosin resin, ink adhesion and viscosity are in increase trend, and when a small amount of rosin resin is added, ink attachment value added is not obvious, illustrate that rosin resin need to reach a certain amount of can reach humidification to ink adhesion.When two resinoid ratios are 1 in ink:When 1, the adhesive force of ink reaches new peak, and ink viscosity is suitable.
It is preferably compatible with mixed solvent, further, the vinyl chloride-vinyl acetate resin includes polymer V1 and polymer V2, polymer V1 is obtained by the vinyl chloride and mass fraction that mass fraction is 96% for 4% vinyl acetate copolymerization, and polymer V2 is obtained by the vinyl chloride and mass fraction that mass fraction is 85% for 15% vinyl acetate copolymerization.In the preparation of vinyl chloride-vinyl acetate resin, the percentage composition of vinyl acetate in copolymer can be controlled to reach different performance requirements by being gradually added VCM.By realizing finding, dissolubility in a solvent, the vinyl chloride-vinyl acetate resin being modified is not so good as unmodified vinyl chloride-vinyl acetate resin, thus the present invention selects polymer V1 and polymer V2.Although the vinyl chloride-vinyl acetate resin of hydroxyl dissolubility in a solvent is than crying out the vinyl chloride-vinyl acetate resin of carboxyl good, reason is because the butanone in hydroxyl and solvent can form certain hydrogen bond, and carboxyl can react with the hydroxyl in alcohol, so its alcohol resistance is slightly poor, but the addition of polymer V2 can improve adhesive force of the ink on the plastic materials such as PE, consider, selective polymer V1 and polymer V2 are used as main resin.
Further, the mass ratio of the polymer V1 and polymer V2 is 1:2.
Further, the solvent dye is SLB-34.
The invention has the advantages that：In the present invention, from vinyl chloride-vinyl acetate resin, chlorinated polypropylene, rosin resin as hybrid resin, the ink film of even compact can be formed to increase the alcohol resistance energy of ink；Again the good wet on PE grounds can be realized to improve the adhesive force of ink.From butanone, toluene and butyl acetate as mixed solvent, hybrid resin can be preferably dissolved in wherein, so as to reduce the viscosity of ink.From paraffin as solvent resistant auxiliary agent, the wax powder of iris action can be built in resin film overlying, to strengthen the alcohol resistance energy of ink.The present invention has the advantages that viscosity is low, adhesive force is strong, alcohol resistance good, quick-drying is suitable, stability is high under the requirement for meeting environmental-protecting performance.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Embodiment 1
Coding ink, is obtained by the raw material of following mass fraction：It is obtained by the raw material of following mass fraction：Vinyl chloride-vinyl acetate resin 4 ~ 8%, chlorinated polypropylene 1 ~ 5%, rosin resin 1 ~ 5%, butanone 58 ~ 70%, toluene 8 ~ 15%, butyl acetate 8 ~ 15%, solvent dye 5 ~ 10%, paraffin 0.2 ~ 0.5%.
It is that and being used for frosting ink should possess first two fundamental propertys with polyethylene ground to carry object to considering for ink adhesion in the present embodiment：One is that ink must have good adhesive force to plastics.There is good attachment on PE grounds, the corrosion that by changing the composition of solvent PE surfaces should be made appropriate is so that it produces good wetting.Two to be that the structure of resin in ink should try one's best similar to PE.PE is a kind of non-polar polymer being crosslinked by C-H bond, former from polarity should being selected relatively small, the similar polyene compound of molecular structure according to similar compatibility.There is ink certain solvent resistant scouring performance to be primarily referred to as resistance to ethanol scouring performance, namely require that selected raw material solubility in ethanol is low or insoluble.Consider, the present invention is from vinyl chloride-vinyl acetate resin, chlorinated polypropylene as matrix resin, vinyl chloride-vinyl acetate resin be by VCM and vinyl acetate in the presence of initiator copolymerization and obtain, in the molecular structure of vinyl chloride-vinyl acetate resin, due in the embedded vinyl chloride chain of nonpolar molecule vinyl acetate, so the polarity of original molecule is reduced, so as to enhance the ability of its resistance to polar solvent dissolving.Thus vinyl chloride-vinyl acetate resin has excellent alcohol resistance, dissolution degree in ethanol is less, is relatively suitable as the matrix resin of alcohol resistance scrubbing ink.Wetability of the chlorinated polypropylene on PE grounds is preferable, and ink viscosity is relatively low by obtained in chlorinated polypropylene.But it is not eventually very strong that chlorinated polypropylene matches somebody with somebody attachment of the ink on PE, thus has also selected rosin resin to be compounded, and the good viscosity of adhesive force satisfactory High-adhesion ink again is so just obtained.Because resin is used as the major part of ink solid constituent, the impact to ink substrate adhesion plays definitely effect, thus ink adhesion increases with the increase of resin quality fraction.But based on considering to ink viscosity, the mass fraction of hybrid resin is：Vinyl chloride-vinyl acetate resin 4 ~ 8%, chlorinated polypropylene 1 ~ 5%, rosin resin 1 ~ 5%.
Solvent accounts for the overwhelming majority of ink, although solvent can volatilize after ink film, but the performance such as the immixture of the volatility of solvent, viscosity, dissolubility, the corrosivity to ground and solvent all has large effect to the adhesive force of ink.And the selection to solvent is considered as：One is that solvent can well dissolve selected resin, and the macromolecular chain in resin can be made intactly to launch.Two is that the solubility parameter of solvent and ground are closer to, by corrosive nature of the increase to ground, so that surface of bottom material generation is less swelling, in so contributing to the molecular structure that the components such as resin penetrate into surface of bottom material.Three is impact of the solvent to ink evaporation rate.Four is that selected solvent should also as far as possible embody environmental-protecting performance, low irritant smell, and volatilizees soon to ensure quick-drying.The present invention can be preferably dissolved in butanone from butanone as bulk solvent, vinyl chloride-vinyl acetate resin and chlorinated polypropylene.Meanwhile, not only film is brighter for butanone, and ink colors are more bright-coloured, and volatility is good, meets the quick-drying needed for product and requires.To obtain preferable adhesive force, while stablizing for the evaporation rate balance and holding ink when can realize printing-ink film forming, also needs to increase secondary solvent.On the basis of consideration and main solvent butanone and rosin resin compatibility,, from toluene and butyl acetate as secondary solvent, solubility of the hybrid resin in toluene is preferable, and macromolecular chain can sufficiently uniformly launch for the present invention, finer and close resin film can be formed after solvent volatile dry, film cohesive force is good.In addition, toluene is good to the corrosivity of PE grounds, when ink is sprayed at PE grounds, toluene can make it produce certain swelling action, produce certain active group, so that resin macromolecule can be embedded in PE surfaces and be anchored, increase adhesive force of the ink to ground.Butyl acetate can preferably dissolve each other with butanone, and form certain ion pair, can increase the repulsion between macromolecular chain, so that the macromolecule in ink preferably disperses, after solvent volatile dry, the ink film of even compact can be formed, thus the alcohol resistance energy of ink can be increased.With the increase of solvent ratio in ink, the adhesive force of ink is then reduced, therefore the mass fraction of butanone is controlled 58 ~ 70% in the present invention, and 8 ~ 15%, the mass fraction of butyl acetate is controlled 8 ~ 15% for the mass fraction control of toluene.
Ink colouring agent is divided into pigment and the big class of dyestuff two, compared with solvent dye, the alcohol resistance of the ink being made up of pigment is preferable, it is substantially insoluble in alcohol, but the viscosity using the made ink of pigment is too big, and dispersiveness is not so good as solvent dye, thus the present invention selects solvent dye as colouring agent.Because solvent dye is slightly soluble in alcohol, especially when its content in ink is more than 10%, alcohol resistance is gradually deteriorated；And when being less than 5%, the colourity of ink is again weaker, requirement is not reached, therefore the mass fraction of solvent dye is 5 ~ 10%.The solvent-resisting of code-spraying printing ink is closely bound up with the surface appearance of ink, and the film of surface ethanol-tolerant is thicker, and alcohol resistance is stronger, and such as in the wax powder of one layer this iris action of resin film overlying, then the alcohol resistance of ink will strengthen.Herein from paraffin as solvent resistant auxiliary agent.It is found through experiments, with the increase of paraffin content, the alcohol resistance of ink increased, but when more than 0.5%, then has insoluble matter to occur in ink.Therefore, the mass fraction of paraffin is controlled 0.2 ~ 0.5% in the present invention.
Preferably, the butanone, the toluene and the mass ratio of the butyl acetate are 7:1:1.It is in mixed solvent, although butanone plus membership reduction ink adhesive force but for the more single toluene solvant of the depreciation and few.Now, what both ratios more should be considered is the impact to ink viscosity.For chlorinated polypropylene, butanone is good solvent, and the dissolubility in toluene is then slightly worse；And for rosin resin, toluene is good solvent, the dissolubility in butanone is then slightly worse.Jing experiments find, when the mass ratio of butanone, toluene and butyl acetate is 7:1:When 1, the chlorinated polypropylene and rosin resin in hybrid resin can preferably dissolve with mixed solvent so that viscosity reduce, meanwhile, larger humidification also can be played to the alcohol resistance of ink.
To realize preferable combination property, it is preferable that be obtained by the raw material of following mass fraction：Vinyl chloride-vinyl acetate resin 5%, chlorinated polypropylene 2.5%, rosin resin 2.5%, solvent dye 8%, paraffin 0.5%, balance of butanone, toluene and butyl acetate, balance of butanone and toluene.Obtained ink ethanol-tolerant of the invention can reach 6s, and viscosity 2.6cP, quick-drying E value is 5.5, and adhesive force is up to 0.24N/mm2。
Preferably, the chlorinated polypropylene and the mass ratio of the rosin resin are 1:1.It is found through experiments, with the increase of rosin resin, ink adhesion and viscosity are in increase trend, and when a small amount of rosin resin is added, ink attachment value added is not obvious, illustrate that rosin resin need to reach a certain amount of can reach humidification to ink adhesion.When two resinoid ratios are 1 in ink:When 1, the adhesive force of ink reaches new peak, and ink viscosity is suitable.
It is preferably compatible with mixed solvent, preferably, the vinyl chloride-vinyl acetate resin includes polymer V1 and polymer V2, polymer V1 is obtained by the vinyl chloride and mass fraction that mass fraction is 96% for 4% vinyl acetate copolymerization, and polymer V2 is obtained by the vinyl chloride and mass fraction that mass fraction is 85% for 15% vinyl acetate copolymerization.In the preparation of vinyl chloride-vinyl acetate resin, the percentage composition of vinyl acetate in copolymer can be controlled to reach different performance requirements by being gradually added VCM.By realizing finding, dissolubility in a solvent, the vinyl chloride-vinyl acetate resin being modified is not so good as unmodified vinyl chloride-vinyl acetate resin, thus the present invention selects polymer V1 and polymer V2.Although the vinyl chloride-vinyl acetate resin of hydroxyl dissolubility in a solvent is than crying out the vinyl chloride-vinyl acetate resin of carboxyl good, reason is because the butanone in hydroxyl and solvent can form certain hydrogen bond, and carboxyl can react with the hydroxyl in alcohol, so its alcohol resistance is slightly poor, but the addition of polymer V2 can improve adhesive force of the ink on the plastic materials such as PE, consider, selective polymer V1 and polymer V2 are used as main resin.
Preferably, the mass ratio of the polymer V1 and polymer V2 is 1:2.
Preferably, the solvent dye is SLB-34.
Above content is to combine the further description that specific preferred embodiment is made to the present invention, it is impossible to which the specific embodiment for assert the present invention is confined to these explanations.For general technical staff of the technical field of the invention, the other embodiment drawn under without departing from technical scheme should be included in protection scope of the present invention.
Claims (7)
1. coding ink, it is characterised in that：It is obtained by the raw material of following mass fraction：Vinyl chloride-vinyl acetate resin 4 ~ 8%, chlorinated polypropylene 1 ~ 5%, rosin resin 1 ~ 5%, butanone 58 ~ 70%, toluene 8 ~ 15%, butyl acetate 8 ~ 15%, solvent dye 5 ~ 10%, paraffin 0.2 ~ 0.5%.
2. coding ink according to claim 1, it is characterised in that：The butanone, the toluene are 7 with the mass ratio of the butyl acetate:1:1.
3. coding ink according to claim 2, it is characterised in that：It is obtained by the raw material of following mass fraction：Vinyl chloride-vinyl acetate resin 5%, chlorinated polypropylene 2.5%, rosin resin 2.5%, solvent dye 8%, paraffin 0.5%, balance of butanone, toluene and butyl acetate.
4. coding ink according to claim 1, it is characterised in that：The chlorinated polypropylene is 1 with the mass ratio of the rosin resin:1.
5. the coding ink according to any one in claim 1 ~ 4, it is characterised in that：The vinyl chloride-vinyl acetate resin includes polymer V1 and polymer V2, polymer V1 is obtained by the vinyl chloride and mass fraction that mass fraction is 96% for 4% vinyl acetate copolymerization, and polymer V2 is obtained by the vinyl chloride and mass fraction that mass fraction is 85% for 15% vinyl acetate copolymerization.
6. coding ink according to claim 5, it is characterised in that：The mass ratio of the polymer V1 and polymer V2 is 1:2.
7. environmentally friendly code-spraying printing ink according to claim 6, it is characterised in that：The solvent dye is SLB-34.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765865.1A CN106675191A (en) | 2015-11-11 | 2015-11-11 | Printing ink for spraying code |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765865.1A CN106675191A (en) | 2015-11-11 | 2015-11-11 | Printing ink for spraying code |
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| CN106675191A true CN106675191A (en) | 2017-05-17 |
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| CN201510765865.1A Pending CN106675191A (en) | 2015-11-11 | 2015-11-11 | Printing ink for spraying code |
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- 2015-11-11 CN CN201510765865.1A patent/CN106675191A/en active Pending
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Application publication date: 20170517 |
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