CN1329212C - Reusable printing plate - Google Patents

Reusable printing plate Download PDF

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Publication number
CN1329212C
CN1329212C CNB031450040A CN03145004A CN1329212C CN 1329212 C CN1329212 C CN 1329212C CN B031450040 A CNB031450040 A CN B031450040A CN 03145004 A CN03145004 A CN 03145004A CN 1329212 C CN1329212 C CN 1329212C
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China
Prior art keywords
printing
metal oxide
organic compound
reusable
printing plate
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Expired - Fee Related
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CNB031450040A
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Chinese (zh)
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CN1470396A (en
Inventor
马丁·古特弗莱施
格拉尔德·埃里克·豪普特曼
哈拉尔德·拉策尔
格哈尔德·派特尔
沃尔夫冈·埃克
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of CN1470396A publication Critical patent/CN1470396A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/006—Printing plates or foils; Materials therefor made entirely of inorganic materials other than natural stone or metals, e.g. ceramics, carbide materials, ferroelectric materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1041—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by modification of the lithographic properties without removal or addition of material, e.g. by the mere generation of a lithographic pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Materials For Photolithography (AREA)
  • Graft Or Block Polymers (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Presented is a reusable printing form including a printing area that has a metal oxide surface, in particular a native oxidized titanium surface, which is treated with at least one amphiphilic organic compound whose polar region has an acidic character. In an advantageous embodiment, n-heptadecanyl hydroxamic acid {CH3-(CH2)16-C(O)-NH-OH} and/or n-octadecanyl phosphonic acid {CH3-(CH2)17-P(O)-(OH)2} is used. Also described is a method for imaging a reusable printing form. The reusable printing form can be used for offset printing.

Description

Reusable printing plate, printing mechanism, printing machine, manufacturing can patterned printing surface method and the pattern forming method of reusable printing plate
Technical field
The present invention relates to reusable printing plate, in particular for the galley with a printing surface of hectographic printing.The invention still further relates to a pattern forming method that can re-use galley.
Background technology
Galley is used in the printing mechanism of printing machine, is used for predetermined printed patterns, predetermined theme or image are applied to printing material.Typical printing material is paper, ground paper, cardboard, organic polymer, fabric or analog.Mainly use galley in the case, apply, constitute or describe pattern to be printed durably (being on the part on galley surface) on its printing surface.This galley can only be used once.Wish for various reasons to adopt reused galley, especially can repeatedly describe or repeatedly form the galley of figure.In other words, interested is that printing surface can constitute second image subsequently after eliminating first map architecture.In this was described, a reusable printing plate should be understood that to have the galley that can repeatedly constitute each visual printing surface.
In hectographic printing, printing surface is formed with the zone of different wetting performance, especially hydrophilic/oleophobic and hydrophobic/lipophile zone.Hectographic printing is based on and utilizes lipophilic substance on the galley, especially contains the unmixability of flow of oil or liquid and hydrophilic substance, especially aqueous fluid or liquid, wherein lipophilic substance or printing ink or process color China ink are attached on the zone of the formation of printing surface image, and hydrophilic substance or water are attached printing surface non-and constitute on the zone of image.When the printing surface of preparing with proper method was wetting with hydrophilic and lipophilic substance, non-image region preferably kept hydrophilic substance and repels lipophilic substance, and image region reception lipophilic substance and repel hydrophilic substance.Consequently, lipophilic substance is transferred on the surface of a material in a suitable manner, thereon with static image.Correspondingly printing surface also constitutes the zone of different wetting performance in anhydrous hectographic printing.
In some documents, propose and discussed the galley that can re-use, especially can describe again.
In EP 0 911 154 A1, propose with titanate (TiO 2) or zirconates (ZnO 2) as the surface of galley, they occur with the accrete ceramic formula of other metal pure or that have the different blended composition and division in a proportion.This surface is hydrophobic at nonexcited state, and can be transformed into hydrophily by the irradiation of ultraviolet light.To become reversible by heating this transfer process.Whole version surface UV-irradiation, and the zone of answering glass laser during printing can form image thus by mask or film covering.In order to eliminate image, then by heating, for example making the image region inverse conversion with laser beam heats.
This especially based on the hydrophobicity of the metal oxide surface that in air, mixes up with hydrocarbon can be for example by using FTIS (FTIR), use X ray photoelectric spectrometer (XPS), using atomic force microscope (AFM) etc. determine.Though should the surface can become by ultraviolet light or wet chemical method hydrophilic, in air, place uncontrollably become again in the several hrs hydrophobic.Therefore neither one is as reset condition hydrophobicity that determine, lasting.
In addition, for example by EP 0 962 333 A1 known use the galley can change printed patterns.Here apply hydrophobic or hydrophilic material on the galley surface, then the galley surface also then applies the look China ink again with water-wet on the galley surface.Because hydrophilic or hydrophobic property, with in the process of water-wet on the hydrophilic surface zone adsorbed water, the hydrophilic surface zone does not receive the process color China ink then with the black coating of process color the time thus.Behind the printing process of predetermined number, will remove the printed patterns that is applied.Then, this galley can constitute or describe a new printed patterns.The known in this respect coating material that uses sulfur alcohol compound as the galley surface.This sulfur alcohol compound will be under heat affecting by from the galley surface removal.
In the scheme according to the know-why of document EP 0 962 333 A1, it is very expensive and time-consuming making a senior monolayer on untreatment surface arbitrarily.Especially golden substrate and employedly have the thiol base (expense of self-organizing molecule SH) has been repelled possible technology and used.
Summary of the invention
Task of the present invention is, proposes a kind of reusable printing plate, and its printing surface can repeatedly produce and eliminate image.
A kind of galley with a printing surface that re-uses, especially can describe or form figure is again proposed according to the present invention, this printing surface has the metal surface that an at least a amphipathic property organic compound of usefulness is handled, and the polarity zone of this compound has the acids characteristic.This amphipathic property organic compound can be the compound of surfactant form.This amphipathic property organic compound can be the inorganic or organic acid that is replaced by aliphatic or aromatic group, and the latter has IV, the V of the periodic table of elements or an element, especially carbon (C), phosphorus (P), sulphur (S) or the nitrogen (N) in VI master's group at least.Described substituted radical can be unsubstituted or substituted fat hydrocarbon (Aliphat) or is substituted or unsubstituted aromatics (Aromat).This group can especially be fluoridized especially partly or entirely by halogenation.This group can especially have a carbochain, and wherein the number of carbon is more than or equal to 12 and be less than or equal to 25.
In one embodiment, the amphipathic property organic compound is hydroxamic acid (Hydroxams  ure) or phosphonic acids.Especially in a preferred embodiment according to reusable printing plate of the present invention, the amphipathic property organic compound is n-heptadecane-hydroxamic acid { CH3-(CH2) 16-C (O)-NH-OH} and/or n-octadecane-phosphonic acids { CH3-(CH2) 17-P (O)-(OH) 2}.Metal oxide surface can be aluminium surface, titanate and the zirconates of the agent for special steel surface of titanium surface, autoxidation of autoxidation such as anti-corrosion Ni-based alloy surface, autoxidation.Therefore the present invention is mainly based on such design: metal oxide surface coarse on the technology is handled with organic compound amphipathic property, the surfactant form, especially applies on coarse metal oxide surface or with organic compound coating amphipathic property, the surfactant form.Therefore this reusable printing plate especially be called as (nanometer range) but the galley of resurfacing.
In other words, galley according to the present invention has a surface, and it obtains by the effect of amphipathic property organic compound on metal oxide surface.As the basis, prepare to will be described below according to the details of the method for galley of the present invention.
Can be particularly advantageous in the offset printing method according to reusable printing plate of the present invention, especially can be used for planographic directly or indirectly.Therefore they especially can be called as the hectographic printing version that can re-use or be called (nanometer range) but the hectographic printing version of resurfacing.
Can repeatedly produce definite hydrophobic metallic oxide surface, especially titanium oxide surface by organic compound amphipathic property, the surfactant form.The printing surface of handling by the amphipathic property organic compound can be changed into hydrophobic.But also can repeatedly produce definite hydrophilic metal oxides surface by organic compound amphipathic property, the surfactant form of hydrophily replacement or terminating.The printing surface of handling by organic compound amphipathic property, the surfactant form of hydrophily replacement can be hydrophilic.This amphipathic property, the surfactant form in a preferred embodiment organic compound is n-heptadecane-hydroxamic acid (CH3-(CH2) 16-C (O)-NH-OH) and tautomeric form thereof and/or n-octadecane-phosphonic acids (CH3-(CH2) 17-P (O)-(OH) 2).That this metal oxide surface will be placed in will be hydrophobic, pass the state of leading the look China ink, and it can be used as the reset condition that offset printing method forms figure.This hydrophobic metal oxide surface to the contact angle of water gaging be 80 with 120 degree between the value that becomes of real number array at interval.This metal oxide surface can by controlled energy input be placed in hydrophilic, pass the state of leading the look China ink.In hydrophily to the contact angle of water gaging be 0 with 10 degree between the value that becomes of real number array at interval.Therefore the side-play amount between these two states is enough big for hectographic printing.Galley according to the present invention is convertible, especially can change between hydrophilic and hydrophobic state.After constituting hydrophilic region and hydrophobic region state, reusable printing plate according to the present invention can implement offset printing method.
Can implement with different embodiments according to reusable printing plate of the present invention with different layouts and geometrical property.Can be configured the surface of a solid cylinder or the surface of a hollow cylinder according to galley of the present invention.Solid or hollow cylinder especially can be a straight cylinder.Its lower surface especially can be understood that horizontal surface.In addition, galley of the present invention also can be configured a sleeve or a flat board.A sleeve has two surfaces (inner surface and outer surface), and has two edges.This sleeve can be has the cylindrical of same diameter, especially same inner diameter or external diameter (hollow cylinder shape) or conical, promptly has variable diameter, the diameter that especially evenly increases or reduce (especially internal diameter or external diameter).Internal diameter and external diameter can differently change.Therefore it is the object of a non-simple relation on the layout meaning.A plate has two surfaces (upper surface and lower surface), and has an edge.Therefore it is the object of a simple relation on the layout meaning.This plate especially can be rectangular six shapes or rectangle.
Reusable printing plate according to the present invention can be applicable in printing mechanism, especially the hectographic printing mechanism.It can constitute the surface of a printing cylinder or be received on the cylinder surface.Therefore, the feature according to printing mechanism of the present invention is to be provided with one at least according to reusable printing plate of the present invention.Printing mechanism according to the present invention can be the part of printing machine, especially an offset press.This printing machine can be a printing machine or a printing machine of handling paper tape of handling page.The printing machine of handling page can have a feeder, a plurality of printing mechanism and a paper delivery device.Printing machine according to the present invention has at least one according to printing mechanism of the present invention.
With according to the invention of reusable printing plate of the present invention relatively, a pattern forming method and a various favourable configuration according to (but especially resurfacing or form figure again) galley that re-uses of the present invention is provided.The method according to this invention wherein can repeatedly form figure according to galley of the present invention and also can be eliminated, so that this galley is particularly suitable for hectographic printing based on the effort of setting up a cyclic process.The method that is used to form figure according to the present invention can be in a printing mechanism or the inner or outside enforcement of printing machine.Printing surface can expose according to the pattern of image by the mask form and process.But preferably use the point-like of digital information directly to expose.
The method that is used on reusable printing plate forming figure according to the present invention may further comprise the steps: but prepare can re-use a, resurfacing or form figure again and have the galley of a printing surface especially, and this printing surface has the metal oxide surface that an at least a amphipathic property organic compound of usefulness is handled.This reusable printing plate especially can be implemented by aforesaid mode.On printing surface, can produce image by selectivity (especially space and temporal selectivity) point-like input energy.In other words, but digital terrain becomes figure.Galley will be transformed into hydrophily from hydrophobic state by forming figure.Printed printing material, especially with offset printing method after, remove figure by large tracts of land input energy.For a new figure being prepared reusable printing plate, the printing surface of the galley solution-treated of amphipathic property organic compound.In other words, the preparation of galley is by iteration or repetition.Therefore, these figures formation and removal process can repeatedly carry out with different printed patterns or theme.The method according to this invention can realize a cyclic process.
In the method according to the invention, the preparation process of reusable printing plate can advantageously comprise with a kind of amphipathic property organic compound and handle printing surface, and the polarity zone of this compound has the acids characteristic.Printing surface can use aqueous solution (or pure water) or alcohol solution, especially ethanol wetting, and it comprises a kind of amphipathic property organic compound of debita spissitudo at least, and its concentration is near saturated border, and preferably concentration is 1mMol/l.Making metal oxide surface stand a kind of amphipathic property organic compound by this step handles.In other words, will apply the amphipathic property organic compound.In a favourable scheme, in ultrasonic wavestrip, carry out this and apply or terminating.To metal oxide surface, especially titania surface apply, terminating or cover the amphipathic property organic compound molecule and stand solution, realize as being immersed in the solution several seconds, so that cause confirmable change on the wetting property macroscopic view by metal oxide surface.
In the method according to the invention, the preparation process of reusable printing plate can advantageously comprise following steps: use the ultraviolet source irradiation metal oxide surface, purify printing surface thus.Remove inadhering compound from treated metal oxide surface.The especially available alcoholic solution of the cleaning of processed metal oxide surface, preferably ethanol is realized.Metal oxide surface processed, that be cleaned will be with non-aqueous technique gas, especially with the next drying of nitrogen.
The preparation of the method according to this invention, especially reusable printing plate can advantageously comprise the step of following preparation metal oxide surface.Metal oxide surface is a surface in more following surfaces: aluminium surface, titanate and the zirconates of the titanium surface of autoxidation, the agent for special steel surface of autoxidation, autoxidation.Exactly, prepare the predeterminable following preparation process of putting the first time of reusable printing plate.Metal oxide surface will be purified in advance.This purification can comprise with acetone, ethanol, isopropyl alcohol, ethyl acetate or the flushing of other appropriate organic solvent.Its purpose is to remove degrease.Metal oxide surface can stand the about 10 minutes processing of a kind of aqueous solution being about under 60 ℃ the temperature, and the component of this solution is: at the H of 4 parts by volume 2The NH of 1 parts by volume 25% among the O 4The H of OH solution and 1 parts by volume 30% 2O 2This step is for the titanium surface advantageous particularly of autoxidation.Its purpose especially is, makes the oxidizing hydrocarbon on metal oxide surface.Main purification can realize by the corrosion of metal oxide surface.This corrosion can at room temperature realize that the component of this solution was in about 1 minute with a kind of solution-treated: at the H of 20 parts by volume 2The H of the HF solution of 1 parts by volume 40% and 3 parts by volume 30% among the O 2O 2Its purpose especially erodes definite roughness of some other burning skins and adjusting metal oxide surface.Definite oxide-film, especially a hydrophilic surface can be realized by the oxidation on purification and the surface of corroding.For this surperficial oxidation, can handle with a kind of solution being about under 60 ℃ the temperature, the component of this solution is: at the H of 4 parts by volume 2The NH of 1 parts by volume 25% among the O 4The H of OH solution and 1 parts by volume 30% 2O 2Corrosion and to produce the step of a definite oxide-film especially favourable for the titanium surface of autoxidation.
In a preferred embodiment according to the inventive method, by electromagnetic radiation optionally point-like input be used for the energy of hydrophiling, can on printing surface, produce a figure thus.This electromagnetic radiation can be in the scope of 150 to 1200 millimicrons of wavelength.The input of energy especially can be carried out in the infrared spectrum zone.Digital image forms can be by laser instrument, preferably the laser instrument of about 1100 millimicrons of wavelength is realized.In a preferred embodiment, by electromagnetic radiation irradiation printing surface, input in large area is used for the energy of hydrophobization, can eliminate figure thus.The large tracts of land irradiation is especially carried out in the ultraviolet spectra zone.A kind of optimized light source is for being excited light source (Excimerstrahler).
In a preferred embodiment, printing cleaning or the removal of behind the printing material printing surface being carried out the process color China ink according to the inventive method.Especially can clean as the cleaning agent of selling with title EUROSTAR by using traditional look China ink washer or traditional cleaning agent, a kind of aqueous solution that contains surfactant.
In a preferred version according to the inventive method, after the energy that is used for hydrophiling on the printing surface of metal oxide surface, the especially titania surface handled with the amphipathic property organic compound by point-like input optionally produced figure, the printing surface of formation was handled with the amphipathic property organic compound of at least a hydrophily replacement or terminating.Substituting group can constitute the head group on the compound molecule.The amphipathic property organic compound can be a kind of compound described in this explanation.Substituting group especially can be one or more NH2 groups, one or more COOH group or one or more OH group.The zone that forms by the input of point-like optionally energy can be in this way covers or terminating with the molecule of the amphipathic property organic compound of replacement or terminating.Method step that should be additional causes the hydrophily in point-like figure zone to strengthen with advantageous manner and is stable.
The present invention is by forming figure and eliminating the galley that method reliable in the figure process, that can repeat provides that can re-use, that especially can describe again or can form figure again.The generation of image or printing surface structure is simple and reliable, and must not constitute the individual layer of amphipathic property organic compound on metal oxide surface self-organizing ground.Therefore the pattern forming method galley preparation time that only needs are very little of galley according to the present invention.Applying above-claimed cpd in time interval a few minutes just is enough to reach the enough strong hydrophobicity of metal oxide surface, and this is particularly suited for using in offset printing method.As the metal oxide surface of current industrially preparing process manufacturing, the method according to this invention especially can realize the hydrophobization of coarse metal oxide surface.
Description of drawings
To and describe by the following drawings now other advantage of the present invention and advantageous embodiments and configuration will be described.Accompanying drawing is:
Fig. 1: be used to form flow chart according to a favourable embodiment of the method for the figure that re-uses galley of the present invention according to the present invention, and
Fig. 2: one according to the sketch plan that re-uses the structure of galley of the present invention, and this galley has the metal surface of handling with at least a amphipathic property organic compound by the method according to this invention.
10 preparation method steps
12 form the method step of figure
14 printing process steps
16 removing method steps
The repetition of 110 each step
30 printed panels
32 lipophile printing surfaces
34 hydrophilic regions
The specific embodiment
Below will describe a favourable embodiment that re-uses favourable embodiment of galley and be used for re-using the method that the figure of galley forms according to the present invention according to of the present invention by the example of the titanium surface of an autoxidation and n-octadecane-phosphonic acids, be unrestricted aspect the amphipathic property organic compound and in the generality aspect the burning surface wherein.
Fig. 1 represents to be used to form according to the present invention the flow chart according to a favourable embodiment of the method for the figure that re-uses galley of the present invention.Sample with titanium surface can be obtained from " Goodfellow " company.For pending titanium surface at first is cleaned, it is shone with light with UV wavelength range.The preparation method step 10 of reusable printing plate comprises and applies organic compound amphipathic property, the surfactant form.Solution-wet is used on the titanium surface, and this solution comprises the above-claimed cpd of debita spissitudo.About 5 minutes time is at room temperature flooded in this titanium surface in the 1mM ethanolic solution of n-octadecane-phosphonic acids (stearic phosphonic acids).Treated titanium surface will realize by the flushing with ethanol purifying, and it will remove inadhesive compound in n-octadecane-phosphonic acids.The titanium surface that is cleaned processing is fully dry with anhydrous, so-called drying process gas (being nitrogen here).
The titanium surface of preparing like this or preparing is hydrophobic and can forms figure with the UV or the IR light source of big intensity.To produce hydrophilic region by forming figure.In a favourable embodiment, use the diode-pumped yttrium of SDL company to mix up fibre laser as light source.Partly, selectively, digital formation figure can be by luminous point (point-like, the 1/e of 30 microns sizes 2Decay) carries out.Its wavelength is 1100 millimicrons, and power is that 3 watts and intensity or fluence (Fluenz) are 30 joules/square centimeter.Form in the method step 12 of figure on the titanium surface, form a visible structure or visible pattern with infrared laser.
Compiled the example that is had the visible structure of various color sensations by the titanium surface of amphipathic property compound treatment in the table below, the polarity zone of this compound has the acids characteristic:
Color sensation Pattern V [cm/s] Irradiation time [μ s] Diode current I[A] Power P [W] Fluence [J/cm 2] Every pixel energy W[mJ]
Brass Whole 25 72 16 1.95 17.7 0.13
Skipper Whole 25 72 22 3.0 27.2 0.19
Coppery Whole 25 72 25 3.7 33.5 0.24
The ash coppery The pixel face 25 72 25 3.7 33.5 0.24
Gray purple The pixel face 25 72 22 3.0 27.2 0.19
Cream-coloured The pixel face 25 72 25 1.95 17.7 0.13
Relatively observe following color sensation for a simple titanium surface:
Color sensation V [cm/s] Irradiation time [μ s] Diode current I[A] Power P [W] Fluence [J/cm 2] Every pixel energy W[mJ]
Coppery 25 72 25 3.7 33.5 0.24
Skipper 25 72 22 3.0 27.2 0.19
Gray purple 25 72 19 2.5 22.6 0.16
Brass 25 72 16 1.95 17.7 0.13
Livid purple look 25 72 17 2.1 19.0 0.14
Skipper 25 72 22 3.0 27.2 0.19
Blue 12.5 14 22 3.0 54.4 0.38
Golden 25 72 32 5.0 45.3 0.32
For the titanium surface of repeatedly handling-do not use the hydrophilic and oleophilic compound treatment, its polarity zone has the acids characteristic, observes following example:
Color sensation Pattern V [cm/s] Irradiation time [μ s] Diode current I[A] Power P [W] Fluence [J/cm 2] Every pixel energy W[mJ]
Skipper Whole 3 * 7 25 72 22 3.0 27.2 0.19
The flash of light skipper Whole 3 * 7 25 2×72 22 3.0 2×27.2 2×0.19
Black and blue color Whole 3 * 7 25 3×72 25 3.0 3×27.2 3×0.19
Dusty blue The pixel face * 3×7 25 72 25 3.0 27.2 0.19
The ash skipper The pixel face * 1.5×7 12 144 25 3.0 54.4 0.38
Variable v represents the sample rate (sweep speed) of printing surface.Pattern can whole forms figure (vollfl.) or with pixel face (pixelfl.).Pixel size is 40 microns.
Different laser energies can cause the different color sensation in surface.The reason of color sensation ascribes titanyl compound to, and it is not to have absolute stoichiometric composition.XPS measuring shows: after the processing of preparing, especially as above describing in detail wet-chemical, have the different oxidation states of titanium in 6 millimicrons of degree of depth on titanium surface.For example TiO, TiO 2, TiO 3, and in these 6 millimicrons of surface, also have metal Ti.After the irradiation of laser, lip-deep oxide-film is thicker than 6 millimicrons, by detectable 6 millimicrons of 100% ground or fully by TiO on the certainty of measurement scope of XPS method 2Form.Once whole laser treatment after a wet-chemical is prepared is an extremely beneficial primary condition that is used for forming the figure of reversible (can eliminate) on this titanium surface.Produce slight color sensation variation though on surperficial the same area, repeatedly form figure, this regional wetting characteristics is not had influence with IR laser.In other words, the irradiation by hydrophobic surface always forms hydrophilic zone.
When irradiation can obtain the effective galley of function greater than 15 joules/square centimeter.Can reach good especially quality more than 30 joules/square centimeter.
In the 3rd printing process step 14, on a printing material, carry out the printing of multiple theme according to offset printing method.After printing, the titanium surface is cleaned by contacting optionally with the solution of the process color China ink of suitable ingredients.In this advantageous embodiment, will use the look China ink washer of EUROSTAR company.
In the cubic method step of eliminating 16, expose in large area and continue 5 minutes under wavelength be about 172 millimicrons ultraviolet light in the titanium surface.As light source use Xerader (OSRAM) company, electrical power is that 20 watt-hour luminous powers are 5 watts xenon excitation source.
Can carry out the repetition 110 of each step now, it starts from the preparation process 10 of reusable printing plate, and this cyclic process can be finished in less than 30 minutes.
Fig. 2 is the sketch plan according to the structure of a reusable printing plate of the present invention, this galley has by the method according to this invention, with the metal surface that at least a amphipathic property organic compound is handled, and the polarity zone of this compound has the acids characteristic.Fig. 2 represents the state of galley 30, and the time sequencing of this state is indicated with arrow.At first galley 30 has large-area hydrophobic printing surface 32.Partly, point-like ground, form figure selectively, can on the surface of galley 30, produce hydrophilic zone 34 thus.Therefore this surface has hydrophobic region 32 and hydrophilic region 34, and this surface can be used for printing thus, especially prints with offset printing method.Carry out on the surface of galley 30 large tracts of land irradiation and with amphipathic property, after its polarity zone has the organic compound processing of acids characteristic, will make this galley have hydrophobic printing surface 32 again in large area.

Claims (25)

1, reusable printing plate, it comprises: the printing surface with metal oxide surface, this metal oxide surface is handled with at least a amphipathic property organic compound with polarity zone of acids characteristic, and it is characterized in that: described amphipathic property organic compound is hydroxamic acid or phosphonic acids.
2, according to the reusable printing plate of claim 1, it is characterized in that: described galley is the hectographic printing version.
3, according to the reusable printing plate of claim 1, it is characterized in that: described amphipathic property organic compound is by the hydroxamic acid or the phosphonic acids of aliphatic or the replacement of aromatic group.
4, according to the reusable printing plate of claim 3, it is characterized in that: the number that described aliphatic or aromatic group have a carbon is more than or equal to 12 and be less than or equal to 25 carbochain.
5, according to the reusable printing plate of claim 1, it is characterized in that: described amphipathic property organic compound is n-heptadecane-hydroxamic acid { CH 3-(CH 2) 16-C (O)-NH-OH} and/or n-octadecane-phosphonic acids { CH 3-(CH 2) 17-P (O)-(OH) 2.
6, according to the reusable printing plate of claim 1, it is characterized in that: described metal oxide surface is to be selected from least a in the following surface: aluminium surface, titanate and the zirconates of the titanium surface of autoxidation, the stainless steel surfaces of autoxidation, autoxidation.
7, according to the reusable printing plate of claim 1, it is characterized in that: because described amphipathic property organic compound, processed printing surface is hydrophobic.
8, according to the reusable printing plate of claim 1, it is characterized in that: described surface is the surface of solid cylinder, the surface of hollow cylinder, the surface or the dull and stereotyped surface of sleeve.
9, printing mechanism, it comprises: at least one has the reusable printing plate of printing surface, this printing surface has metal oxide surface, this metal oxide surface is handled with at least a amphipathic property organic compound with polarity zone of acids characteristic, and it is characterized in that: described amphipathic property organic compound is hydroxamic acid or phosphonic acids.
10, printing machine, it comprises: at least one printing mechanism, this printing mechanism has at least one reusable printing plate with printing surface, this printing surface has metal oxide surface, this metal oxide surface is handled with at least a amphipathic property organic compound with polarity zone of acids characteristic, and it is characterized in that: described amphipathic property organic compound is hydroxamic acid or phosphonic acids.
11, make can patterned printing surface method, it may further comprise the steps:
Prepare a printing surface with metal oxide surface, and
Handle this metal oxide surface with at least a amphipathic property organic compound with polarity zone of acids characteristic, it is characterized in that: described amphipathic property organic compound is hydroxamic acid or phosphonic acids.
12, the pattern forming method of reusable printing plate, it may further comprise the steps:
Prepare a reusable printing plate with printing surface, this printing surface has metal oxide surface, this metal oxide surface is handled with at least a amphipathic property organic compound with polarity zone of acids characteristic, and wherein said amphipathic property organic compound is hydroxamic acid or phosphonic acids;
On printing surface, produce a figure by the input of pointwise optionally energy;
On printed substrates, after the printing, eliminate figure by large tracts of land input energy.
13, according to the method for claim 12, it is characterized in that: described printing is hectographic printing.
14, according to the method for claim 12, it is characterized in that: the preparation of reusable printing plate comprises uses solution-wet printing surface, this solution to comprise at least a amphipathic property organic compound.
15, according to the method for claim 12, it is characterized in that: the preparation of reusable printing plate may further comprise the steps:
By purifying printing surface with the ultraviolet source irradiation metal oxide surface;
Remove inadhering compound from treated metal oxide surface; And
With the dry metal oxide surface of non-aqueous technique gas.
16, according to the method for claim 15, it is characterized in that: described non-aqueous technique gas is nitrogen.
17, according to the method for claim 12, it is characterized in that: the preparation of reusable printing plate comprises the step of preparing metal oxide surface by preliminary clearning.
18, according to the method for claim 12, it is characterized in that: the preparation of reusable printing plate comprises the following step that is used to prepare metal oxide surface, and this metal oxide surface is the titanium surface of autoxidation:
The titanium surface of corrosion autoxidation; And
Produce a definite oxidation film.
19, according to the method for claim 18, it is characterized in that: described definite oxidation film is a pending hydrophilic surface.
20, according to the method for claim 12, it is characterized in that: the step that produces figure makes the regional hydrophiling of printing surface, and comprises use first electromagnetic radiation; And the step of eliminating comprises with second electromagnetic radiation irradiation printing surface.
21, according to the method for claim 20, it is characterized in that: described first electromagnetic radiation is in ultraviolet spectral range.
22, according to the method for claim 20, it is characterized in that: described second electromagnetic radiation is in infrared range of spectrum.
23, according to the method for claim 12, it is characterized in that: after producing the step of figure, replaced by hydrophilic radical or the amphipathic property organic compound processing printing surface of end-blocking with at least a.
24, according to the method for claim 12, it also comprises: after the printing, clean the printing surface of printing-ink on printed substrates.
25, according to the method for claim 24, it is characterized in that: described cleaning process comprises uses the printing ink cleaning solution.
CNB031450040A 2002-06-17 2003-06-17 Reusable printing plate Expired - Fee Related CN1329212C (en)

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JP2004042633A (en) 2004-02-12
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DE10227054B4 (en) 2013-01-03
EP1375136A1 (en) 2004-01-02
EP1375136B1 (en) 2008-02-13
DE50309140D1 (en) 2008-03-27
CN101121351A (en) 2008-02-13
DK1375136T3 (en) 2008-06-02
HK1062662A1 (en) 2004-11-19
CN1470396A (en) 2004-01-28
DE10227054A1 (en) 2003-12-24
ATE385894T1 (en) 2008-03-15

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