CN104723717B - A kind of flexographic plate of CTP and preparation method thereof - Google Patents
A kind of flexographic plate of CTP and preparation method thereof Download PDFInfo
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- CN104723717B CN104723717B CN201310710866.7A CN201310710866A CN104723717B CN 104723717 B CN104723717 B CN 104723717B CN 201310710866 A CN201310710866 A CN 201310710866A CN 104723717 B CN104723717 B CN 104723717B
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- diaphragm
- elastomer body
- photosensitive elastomer
- flexographic plate
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
- G03F7/2014—Contact or film exposure of light sensitive plates such as lithographic plates or circuit boards, e.g. in a vacuum frame
- G03F7/2016—Contact mask being integral part of the photosensitive element and subject to destructive removal during post-exposure processing
- G03F7/202—Masking pattern being obtained by thermal means, e.g. laser ablation
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Optics & Photonics (AREA)
- Materials For Photolithography (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
The present invention discloses a kind of flexographic plate of CTP and preparation method thereof; the flexographic plate includes support, photosensitive elastomer body layer, adherent layer and diaphragm from bottom to top; the plate directly uses computer scanning; then cleaned with water or solvent; heated-air drying, so that it may flexographic printing plates are made, computer scanning is scanned in scanning before diaphragm is peeled off or after diaphragm stripping; photosensitive elastomer body layer is extremely sensitive to purple light and ultraviolet light, can full cross-linked solidification；Diaphragm is transparent membrane.The present invention realizes the laser combination that quickly plate-making is reduced with fine site, and good with flexographic plate photosensitive elastomer body layer bonding force.
Description
Technical field
The present invention relates to a kind of flexographic plate of CTP and preparation method thereof, more particularly, to a kind of computer
Flexible photosensitive resin plate that can be directly imaged and preparation method thereof.
Background technology
At present, flexographic plate be widely used in carton, flexible package, label etc. be easily deformed or softer stock printing.
Generally, the film with pattern or word is placed on unexposed flexographic plate, ultraviolet exposure, film is transparent
Place pass through ultraviolet light, photosensitive elastomer body crosslinks solidification.Reaction can not be crosslinked through the region of ultraviolet, profit
With the difference of their solubility in developer solution, rinse development and obtain the relief image containing character pattern.Plate after development
Dry, go to glue, post-exposure.The plate made is fixed on the roller of flexible printing press, can prepare printing.
Foregoing lithography process needs the film with pattern or word, and film is easy to by washing processing, dust, humidity etc.
External condition influences, and causes disadvantage, influences the reduction of flexographic plate plate word, pattern etc., prevents while film is attached to flexographic plate
When adhesion coating is made a plate, easily it is bonded film and causes the plate-making disadvantage such as refraction, scattering of light, cause pattern or word also proper mass to drop
It is low.
With the development of document processing technology before computer technology and print, the document information with pattern or word etc. can be with
Digital information is converted into, by computer control, digital information is converted into infrared laser, purple laser etc. and is output to flexographic plate
On, realization is made a plate without film, so that eliminating the plate graph and text reduction quality caused using film reduces problem.
In order to realize said process, researcher has found various solutions.United States Patent (USP) US5719009 is used soft
Property a version photosensitive elastomer body layer barrier layer is set above, then infrared laser ablation layer is set on barrier layer, then with infrared sharp
Light ablation is imaged, then is made a plate by normal flexible version, imposes back exposing, positive exposure, solvent or buck rinsing, drying, post processing etc.
Plate-making.Japan Patent JP-A-10-119436 is using the heat decomposable resin such as common polyester, makrolon, 1-2 μm of coating layer thickness,
Its heat decomposition temperature is high, it is necessary to special laser, and laser energy requires high, and its lithography process is similar with US5719009.It is beautiful
State patent US6037102 uses water-soluble poval-polyethylene glycol for matrix resin, aids in the laser such as carbon black heat absorption material
Material, realizes laser ablation, but to remove the region of non-laser ablation, it is necessary to wash in lithography process, solvent again after washing
Plate-making, the step that operates is more, washes the different systems of version, and user uses complicated.
Chinese patent 200910227511.6 is also a kind of flexographic plate of laser ablation black film.
Also a kind of soft version of laser direct engraving, the elastomer of early stage is rubber, now with photosensitive synthetic resin.It is this
The advantage of plate is need not to dry flushing, eliminates flushing link, saves a large amount of expenses；Due to that need not be done again to printing plate
It is dry, it can significantly shorten the plate-making time；But it is insufficient for the reduction of fine site to carve soft version, and Recession rate is slow, ablation residue
Processing is also pretty troublesome.
The content of the invention
The present invention is in the case where overcoming above-mentioned a variety of disadvantages, and the computer direct printmaking plate invented is realized sharp
The light combination that quickly plate-making is reduced with fine site, and it is good with flexographic plate photosensitive elastomer body layer bonding force.
The sensitivity of conventional flexographic only has 4000-5000mj/cm2, the sensitivity of flexographic plate of the invention can reach 300mj/
cm2, computer capacity directly scans.
The purpose of the present invention is achieved through the following technical solutions：
A kind of flexographic plate of CTP, it include from bottom to top support, photosensitive elastomer body layer, adherent layer and
Diaphragm, the plate of the flexographic plate directly uses computer scanning, is then cleaned with water or solvent, heated-air drying, so that it may be made
Flexographic printing plates.Photosensitive elastomer body layer is felt to purple light and ultraviolet light height, can full cross-linked solidification after computer scanning；Diaphragm is
Transparent membrane.There can also be adhesive linkage between support and photosensitive elastomer body layer, for increasing support and photosensitive elastomer body
The fastness of layer.
Support of the present invention includes：It is poly- to have supportted the carbonic ester of naphthalene -2,6- bis-, polyethylene terephthalate, gathered
Mutual-phenenyl two acid bromide two alcohol ester, polyvinyl chloride, polypropylene, makrolon, aluminium sheet, stainless steel plate, copper coin etc., it would however also be possible to employ its
His polymer sheet etc., 50-300 μm of thickness.
In photosensitive elastomer body layer of the present invention, at least containing a kind of thermoplastic polymeric material, at least one vinyl
Unsaturated compound, at least one initiator trigger system, a kind of sensitizer, other auxiliary agents etc..
Thermoplastic polymeric material in photosensitive elastomer body layer can be the copolymer of Butadiene/Styrene, isoprene/benzene
The copolymer of ethene, acrylonitrile/styrol copolymer, acrylonitrile/butadiene/styrene copolymer, polyurethane, polyethylene etc.,
Such example such as polystyrene-polybutadiene-polystyrene triblock copolymer, polystyrene-polyisoprene-polyphenyl second
Alkene triblock copolymer, Polystyrene-Polyethylene butylene-polystyrene block copolymer, the star of polystyrene-polyisoprene
Type copolymer, acrylonitrile/butadiene/styrene copolymer etc..
Vinyl unsaturated compound in photosensitive elastomer body layer can be such monomer such as 2- (2 ethoxy ethoxy)
Ethyl propylene acid esters, isobornyl acrylate, 2- benzene oxygen ethyl propylenes acid esters, tetrahydrofurfuryl alcohol acrylate, (methyl) acrylic acid-
2- hydroxyl ethyl esters, acrylic acid -2- hydroxyl ethyl esters, (methyl) hydroxypropyl acrylate, butyl acrylate, (methyl) 2-ethyl hexyl acrylate, (first
Base) dodecylacrylate, (methyl) octadecyl acrylate, 1,3-PD two (methyl) acrylate, BDO
Two (methyl) acrylate, 1,5-PD two (methyl) acrylate, 1,6- hexylene glycols two (methyl) acrylate, 1,9- nonyls
Glycol two (methyl) acrylate, triethylene Glycol two (methyl) acrylate, four condensed ethandiol two (methyl) acrylate, five
Condensed ethandiol two (methyl) acrylate, propylene glycol diacrylate, tripropylene glycol two (methyl) acrylate, four contractings third
Glycol two (methyl) acrylate, neopentylglycol diacrylate, PDDA, O-phthalic
Sour tripropylene glycol diacrylate, ethoxylated bisphenol a diacrylate, ethoxylated trimethylolpropane triacrylate,
Glycerol propoxylate triacrylate, 2,2- bis- (p-hydroxybenzene)-propane two (methyl) acrylate, dihydroxy methylpropane two
(methyl) acrylate, trimethylolpropane tris (methyl) acrylate, pentaerythrite two (methyl) acrylate, pentaerythrite
Three (methyl) acrylate, pentaerythrite four (methyl) acrylate, Dipentaerythritol Pentaacrylate, two-trihydroxy methyl third
Alkane tetraacrylate etc..
Initiator or initiation system in photosensitive elastomer body layer (2) can be benzophenone, rice sneer ketone, 4- acetoxyl groups-
4 ,-diethylamide benzophenone, benzoin ethyl ether, Alpha-hydroxy cumene ketone, Alpha-hydroxy phenylcyclohexyl ketone, 2- benzene
Base -2,2- dimethoxyacetophenon ketone, 2- tertiary butyls anthraquinone, isopropyl thioxanthone, the bases 1 of (morpholinyl benzoyl) 1- six,
1 (dimethylamino) propane, benzil, benzoin etc..
Sensitizing dye is different and different according to light source used, and the dyestuff for being usually used in purple laser sensitized systems is roughly divided into four
Class：A. the purple laser sensitizing dye of acetone derivatives class；B. portion spends the purple laser sensitizing dye of cyanines class (merocyaine dye)；C. contain
The purple laser sensitizing dye of styryl structures；D. the purple laser sensitizing dye of coumarin derivative class.
There are two major classes by the interaction between light activated sensitizing dye and initiator：Energy transfer and electro transfer,
So that initiator is decomposed, free radical polymerization is produced.The power of interaction and dyestuff and the molecule knot of initiator
Structure is related, directly influences sensitizing efficiency, research shows：Using organic titanic compound as initiator, the purple laser of above-mentioned four major class increases
Sensitizing efficiency highest containing styryl structures in infection material.
Because dye molecule is all the conjugated structure with phenyl ring or heterocycle composition, rigidity is stronger, need to consider to improve it and match somebody with somebody
The compatibility of other components in side, to avoid in plate storing process, the sensitivity caused by dye crystallization or precipitation declines.
Sensitizer in photosensitive elastomer body layer can be peacock green, CuPc and disperse orange.Can also include tertiary amine
The compound of base, such as N, N- diethyl-to dimethylamino benzamide；(4- dimethylamino phenyls)-(1- piperidyls)-ketone；
(4- dimethylamino phenyls)-(4- morpholinyls)-ketone etc..
Other auxiliary agents such as antioxidant, hot inhibitor, releasing agent, levelling agent, dyestuff can also be added in photosensitive elastomer body layer.
Adherent layer used film forming resin of the present invention is polyamide (Macromelt6900#, U.S. Henkel
Adhesives companies), the inside can add the various auxiliary agents such as levelling agent, surfactant.
Polyamide is dissolved in n-butanol, toluene solvant, coating solution is configured to, can using roller coating, blade coating,
The coating methods such as anilox roll coating, dip-coating, are coated on diaphragm, dry winding and form.The coating layer thickness of adherent layer is in 0.5-
20 μm, preferably at 0.5-10 μm, dry coating weight 0.2-10g/m2, best 1.0-5g/m2。
Diaphragm is transparent membrane, and the light transmission rate to wave-length coverage in 350-450nm is more than 80%, more preferably greater than
90%.Film thickness is 75-175 μm, preferably 100-125 μm
Diaphragm of the present invention includes：It is poly- to have supportted the carbonic ester of naphthalene -2,6- bis-, polyethylene terephthalate, gathered
Mutual-phenenyl two acid bromide two alcohol ester, polyvinyl chloride, polypropylene, makrolon etc..
Integrated, the present invention referred to as anti-sticking composite membrane containing adherent layer and diaphragm.When preparing anti-sticking composite membrane, protecting
Adherent layer is coated with cuticula, is wound after drying standby.
Each component in photosensitive elastomer body layer is proportionally added into extruder, heating, mixing, exhaust etc., in 110-
150 DEG C knead 2-5 minutes, and extrusion the sheet material of the 0.5-6.35mm thickness of photosensitive elastomer body is made through die head, then by photosensitive bullet
Property body sheet surface heating pressurization be covered with support and the anti-sticking composite membrane containing adherent layer and diaphragm, just obtain counting
The flexographic plate that calculation machine is directly made a plate.
During CTP, first to plate back-exposure, base is formed.Then directly with purple laser or Ultra-Violet Laser
Deng being scanned to plate front, sweep test crosslinking curing.Diaphragm is torn, with water or solvent washing, is washed away uncrosslinked
Photosensitive elastomer body, is formed with the pattern of projection, subsequent 60-70 DEG C of drying, post-exposure, goes to glue, that is, obtain what can be printed on the machine
Flexographic plate.It can also be formed to plate back-exposure after base, first tear diaphragm, then with purple laser or Ultra-Violet Laser etc.
Plate front is scanned, with water or solvent washing, uncrosslinked photosensitive elastomer body is washed away, the pattern of projection is formed with, with
Afterwards 60-70 DEG C of drying, post-exposure, go to glue, that is, obtain the flexographic plate that can be printed on the machine.
Brief description of the drawings
Accompanying drawing 1 is the flexographic plate structural representation of the CTP of the present invention.
Embodiment
Below in conjunction with the accompanying drawings 1 and embodiment the present invention is elaborated, but present disclosure is not limited to this.
The lithography process of the present invention：To plate back exposing, front scan tears film, washes version, dries, and post-exposure goes to glue
Etc. program.Film can also be first torn after back exposing and carry out front scan again, then wash version, dried, post-exposure goes to glue.
Embodiment 1
Support 1, which can select to gather, has supportted the carbonic ester of naphthalene -2,6- bis-, polyethylene terephthalate, poly terephthalic acid
Butanediol ester etc., 50-300 μm of thickness.The present embodiment using polyethylene terephthalate as support, 100 μm of thickness,
Lekai company produces.
The preparation of photosensitive elastomer body layer 2：By thermoplastic elastomer (TPE) SIS 1107 (Ke Teng companies) 700g, plasticizer polybutadiene
(Zhangjiagang bonded area it is prompt for alkene Nisso PB-P 2000 (Japanese Nippon Soda) 200g, 1- hydroxy-cyclohexyl phenyl ketone
International Trading Company Ltd) 32g, 2,6- d-tert-butyl-p-cresol (Nanjing Kowloon Chemical Co., Ltd.) 12g, trimethylolpropane
Triacrylate 40g (Tianjin proud son of heaven Chemical Co., Ltd.), (Tianjin proud son of heaven chemical industry has 1,9- nonanediol diacrylate 15.8g
Limit company), dyestuff RED 335 (BASF AG) 0.2g, styryl benzimidazole dyestuff 0.2g, be added to double screw extruder
In, 150 DEG C knead 2 minutes, the photosensitive elastomer body layer 2 that extrusion thickness is 2.70mm, standby.
It is prepared by adherent layer 3：Polyamide6900 (German Henkel companies production) 100g, FC-4430 (3M
Company produces) 0.1g, dioctyl phthalate 0.1g, it is dissolved in the mixed solvent 900g of toluene/n-butanol (mass ratio 4/1)
In, this solution is coated on diaphragm 4 with 30 ms/min of speed, 100 DEG C of dryings 5 minutes, obtains coating layer thickness for 2 μm
Adherent layer, wind it is standby.
Diaphragm 4, which can select to gather, has supportted the carbonic ester of naphthalene -2,6- bis-, polyethylene terephthalate, poly terephthalic acid
Butanediol ester etc., 50-300 μm of thickness.The present embodiment using polyethylene terephthalate as support, 100 μm of thickness,
Lekai company produces.
Lower surface of the thickness for the sheet material of 1.60mm photosensitive elastomer body layer 2 will be extruded in above-described embodiment, at 120 DEG C and
Under 6MPa heating pressurizations, support 1 is covered with, while the upper surface of the sheet material in photosensitive elastomer body layer 2, adds at 120 DEG C and 6MPa
Under heat pressurization, the anti-sticking composite membrane containing adherent layer 3 and diaphragm 4 is covered with the present embodiment, just obtaining can be direct with computer
The flexographic plate of plate-making.
Printing plate made from foregoing invention, does not throw off diaphragm 4, and first back exposing 20 seconds (under 365nm, light intensity 9.7mw/cm2),
Use Lusher XPOSE！Laser diode, power 95Mw/cm2, rotating speed 550rpm, dominant wavelength 375nm, direct scanning imagery,
Imagewise pattern is 70%, 50%, 10%, 5%, 3%, 2%, 1% site under 133lpi.
Then 7 minutes are washed with the environmentally friendly developer solution in Shanghai quick morning, 65 DEG C of heated-air dryings 2 hours go viscous 5-12 minute, rear exposure
Light 5 minutes, the reduction of evaluation and test site.
Embodiment 2
Support 1, which can select to gather, has supportted the carbonic ester of naphthalene -2,6- bis-, polyethylene terephthalate, poly terephthalic acid
Butanediol ester etc., 50-300 μm of thickness.The present embodiment using polyethylene terephthalate as support, 125 μm of thickness,
Lekai company produces.
The preparation of photosensitive elastomer body layer 2：Thermoplastic elastomer (TPE) SIS D1160ES (Ke Teng companies) 700g, plasticizer are gathered
(Japanese Nippon Soda) 200g, 1- hydroxy-cyclohexyl phenyl ketones of butadiene Nisso PB-P 2000 (Zhangjiagang bonded area
Tian Jie International Trading Company Ltd) 32g, 2,6- d-tert-butyl-p-cresol (Nanjing Kowloon Chemical Co., Ltd.) 12g, trihydroxy methyl
Propane triacrylate 40g (Tianjin proud son of heaven Chemical Co., Ltd.), 1,9- nonanediol diacrylate 15.8g (the Tianjin proud son of heavens
Work Co., Ltd), dyestuff RED 335 (BASF AG) 0.2g, pyridine cyanine dyes 0.2g, be added in double screw extruder, 140
DEG C mixing 2 minutes, extrusion thickness for 1.58mm photosensitive elastomer body layer (2), it is standby.
Adherent layer 3 prepares be the same as Example 1.
The selection be the same as Example 1 of diaphragm 4.
Sheet material lower surface of the thickness for 1.58mm photosensitive elastomer body layer 2 will be extruded in above-described embodiment, at 120 DEG C and
Under 6MPa heating pressurizations, support 1 is covered with, while the upper surface of the sheet material in photosensitive elastomer body layer 2, adds at 120 DEG C and 6MPa
Under heat pressurization, the anti-sticking composite membrane containing adherent layer 3 and diaphragm 4 is covered with the present embodiment, just obtaining can be direct with computer
The flexographic plate of plate-making.
Embodiment 3：
The selection be the same as Example 2 of support 1.
The preparation of photosensitive elastomer body layer 2：By thermoplastic elastomer (TPE) SIS 1107 (Ke Teng companies) 750g, plasticizer polybutadiene
(Zhangjiagang bonded area it is prompt for alkene Nisso PB-P 2000 (Japanese Nippon Soda) 150g, 1- hydroxy-cyclohexyl phenyl ketone
International Trading Company Ltd) 32g, 2,6- d-tert-butyl-p-cresol (Nanjing Kowloon Chemical Co., Ltd.) 12g, trimethylolpropane
Triacrylate 30g (Tianjin proud son of heaven Chemical Co., Ltd.), (Tianjin proud son of heaven chemical industry has 1,9- nonanediol diacrylate 25.8g
Limit company), dyestuff RED 335 (BASF AG) 0.2g, CuPc 0.2g, be added in double screw extruder, 140 DEG C mixing 2
Minute, the photosensitive elastomer body layer 2 that extrusion thickness is 2.70mm is standby.
Adherent layer 3 prepares be the same as Example 1.
Diaphragm 4 selects be the same as Example 1.
Sheet material lower surface of the thickness for 1.60mm photosensitive elastomer body 2 will be extruded in above-described embodiment, in 120 DEG C and 6MPa
Heat under pressurization, be covered with support 1, while the upper surface of the sheet material in photosensitive elastomer body layer 2, adds in 120 DEG C and 6MPa heating
Pressure, is covered with the present embodiment the anti-sticking composite membrane containing adherent layer 3 and diaphragm 4, just obtaining can be with CTP
Flexographic plate.
Embodiment 4：
The selection be the same as Example 2 of support 1.
The preparation be the same as Example 2 of photosensitive elastomer body layer 2.
It is prepared by adherent layer 3：It is prepared by adherent layer 3：Polyamide6900 (German Henkel companies production) 80g
It is dissolved in n-butanol solvent 900g, above-mentioned solution is heated to 50 DEG C, dissolved efficiency is more preferably.Being subsequently added FC-4430, (3M is public
Department's production) 0.1g, dioctyl phthalate 0.1g, this solution is coated on diaphragm 4 with 30 ms/min of speed, 100
DEG C dry 5 minutes, it is 3 μm of adherent layer to obtain coating layer thickness, is wound standby.
Diaphragm 4 selects be the same as Example 1.
Sheet material lower surface of the thickness for 2.70mm photosensitive elastomer body 2 will be extruded in above-described embodiment, in 120 DEG C and 6MPa
Heat under pressurization, be covered with support 1, while the upper surface of the sheet material in photosensitive elastomer body layer 2, adds in 120 DEG C and 6MPa heating
Pressure, is covered with the present embodiment the anti-sticking composite membrane containing adherent layer 3 and diaphragm 4, just obtaining can be with CTP
Flexographic plate.
Embodiment 5：
The selection be the same as Example 2 of support 1.
The preparation be the same as Example 2 of photosensitive elastomer body layer 2.
It is prepared by adherent layer 3：Polyamide6900 (German Henkel companies production) 95g, acrylic resin
ZD-980 (East Asia synthesizes Chemical Co., Ltd.) 4.8g, FC-4430 (production of 3M companies) 0.1g, dioctyl phthalate
In 0.1g, the mixed solvent 900g for being dissolved in toluene/isopropanol (mass ratio 4/1), this solution is applied with 30 ms/min of speed
Cloth is on diaphragm 4,100 DEG C of dryings 5 minutes, obtains the adherent layer that coating layer thickness is 3 μm, winds standby.
Diaphragm 4 selects be the same as Example 2.
Sheet material lower surface of the thickness for 2.70mm photosensitive elastomer body 2 will be extruded in above-described embodiment, in 120 DEG C and 6MPa
Heat under pressurization, be covered with support 1, while the upper surface of the sheet material in photosensitive elastomer body layer 2, adds in 120 DEG C and 6MPa heating
Pressure, is covered with the present embodiment the anti-sticking composite membrane containing adherent layer 3 and diaphragm 4, just obtaining can be with CTP
Flexographic plate.
Comparative example 1
The preparation be the same as Example 1 of support 1.
The preparation be the same as Example 1 of photosensitive elastomer body layer 2.
It is not provided with adherent layer 3.
The preparation be the same as Example 1 of diaphragm 4.
Sheet material lower surface of the thickness for 2.70mm photosensitive elastomer body 2 will be extruded in above-described embodiment, in 120 DEG C and 6MPa
Heat under pressurization, be covered with support 1, while the upper surface of the sheet material in photosensitive elastomer body layer 2, adds in 120 DEG C and 6MPa heating
Pressure, is covered with diaphragm 4 in the present embodiment, obtains the flexographic plate of CTP.
Comparative example 2
The preparation be the same as Example 1 of support 1.
The preparation of photosensitive elastomer body layer 2：By thermoplastic elastomer (TPE) SIS 1107 (Ke Teng companies) 750g, plasticizer polybutadiene
(Zhangjiagang bonded area it is prompt for alkene Nisso PB-P 2000 (Japanese Nippon Soda) 150g, 1- hydroxy-cyclohexyl phenyl ketone
International Trading Company Ltd) 32g, 2,6- d-tert-butyl-p-cresol (Nanjing Kowloon Chemical Co., Ltd.) 12g, trimethylolpropane
Triacrylate 30g (Tianjin proud son of heaven Chemical Co., Ltd.), (Tianjin proud son of heaven chemical industry has 1,9- nonanediol diacrylate 25.8g
Limit company), dyestuff RED 335 (BASF AG) 0.2g, be added in double screw extruder, 140 DEG C knead 2 minutes, and extrusion is thick
The photosensitive elastomer body layer 2 for 2.70mm is spent, it is standby.
The preparation be the same as Example 1 of adherent layer 3.
The preparation be the same as Example 1 of diaphragm 4.
Sheet material lower surface of the thickness for 2.70mm photosensitive elastomer body 2 will be extruded in above-described embodiment, in 120 DEG C and 6MPa
Heat under pressurization, be covered with support 1, while the upper surface of the sheet material in photosensitive elastomer body layer 2, adds in 120 DEG C and 6MPa heating
Pressure, is covered with the present embodiment the anti-sticking composite membrane containing adherent layer 3 and diaphragm 4, just obtaining can be with CTP
Flexographic plate.
Comparative example 3
The conventional plate lithography process of the Du Pont DHC of in the market：First prepare negative film.Then to plate back exposing, film is torn,
Negative film is pasted, is vacuumized, positive exposure washes version, dries, go to glue, the program such as post-exposure.
Comparative example 4
The wheat dolantin 170MVP Digital plate lithography process of in the market：To plate back exposing, film is torn, ablation is black
Film, positive exposure, washes version, dries, goes to glue, the program such as post-exposure.
Flexible plate making evaluation criterion：
1. flow of making a plate
Zero ... excellent (only need to expose, rinse)
▲ ... good (needing laser ablation black film, it is necessary to expose, rinse)
× ... poor (needing to make negative film in advance, it is necessary to which laser ablation black film is, it is necessary to expose, rinse).
2. film speed
Zero ... excellent (1% site can come out)
▲ ... good (1% site can not come out, and 2% site can come out)
× ... poor (less than 3% site can not come out).
Plate made from foregoing invention and the plate compared, diaphragm (4), 20 seconds (365nm of first back exposing are not thrown off
Under, light intensity 9.7mw/cm2), use Lusher XPOSE！Laser diode, power 95mw/cm2, rotating speed 550rpm, dominant wavelength
375nm, direct scanning imagery, imagewise pattern is 70%, 50%, 10%, 5%, 3%, 2%, 1% site under 133lpi.
Then 7 minutes are washed with the environmentally friendly developer solution in Shanghai quick morning, 65 DEG C of heated-air dryings 2 hours go viscous 5-12 minute, rear exposure
Light 5 minutes, the reduction of evaluation and test site.
3. diaphragm is peeled off
By the laser ablation black film ablation of above-mentioned Metal Substrate resin plate into 2 × 10cm strip, in flexible platemaking apparatus
Face exposure 5 minutes on KY1320 (Guangzhou white clouds science and trade), with FPT-F1 coefficient of frictions/peeling tester (Jinan blue streak)) enter
Row measurement.With peeling rate 150mm/min, peel angle 1800Operation, test diaphragm and photosensitive elastomer body (or antiadhesion barrier)
Peeling force, peeling force preferably peels off less than 5g/cm.
4. effect of making a plate
Obtained plate is analyzed with the soft version analyzers of FAG Vipflex334 (FAG companies of Switzerland).Test is independent
Line and the reduction situation for highlighting negative line, independent lines it is thin and it is straight preferably, negative line is more deep better.It is excellent respectively with zero ..., ▲ ... it is good, × ...
Difference is represented.
Embodiment 1~5 and the evaluation result of comparative example 1~4 are as follows：
| Test sequence number | Plate-making flow | Film speed | Diaphragm is peeled off | Plate-making effect |
| Embodiment 1 | ○ | ○ | ○ | ○ |
| Embodiment 2 | ○ | ○ | ○ | ○ |
| Embodiment 3 | ○ | ○ | ○ | ○ |
| Embodiment 4 | ○ | ○ | ○ | ○ |
| Embodiment 5 | ○ | ○ | ○ | ○ |
| Comparative example 1 | ○ | ○ | × | × |
| Comparative example 2 | ○ | × | ○ | ○ |
| Comparative example 3 | × | × | ○ | ▲ |
| Comparative example 4 | ▲ | × | ○ | ○ |
As can be seen from the above table, plate of the invention plate-making flow is succinct, there is wider photosensitive interval, effect of making a plate
It is good.
Claims (9)
1. a kind of flexographic plate of CTP, it includes support from bottom to top（1）, photosensitive elastomer body layer（2）, it is anti-sticking
Layer（3）And diaphragm（4）, it is characterised in that：The plate of the flexographic plate directly uses computer scanning, then clear with water or solvent
Wash, heated-air drying, so that it may flexographic printing plates are made, computer scanning is in scanning before diaphragm is peeled off or after diaphragm stripping
Scanning, photosensitive elastomer body layer（2）It is extremely sensitive to purple light and ultraviolet light, can full cross-linked solidification；Diaphragm（4）For thin transparent
Film；Described photosensitive elastomer body layer（2）At least containing a kind of thermoplastic polymeric material, the unsaturated chemical combination of at least one vinyl
Thing, at least one initiator trigger system, a kind of sensitizer, auxiliary agent；Sensitizer is different and different according to light source used, uses
It is divided into four classes in the dyestuff of purple laser sensitized systems：A. the purple laser sensitizing dye of acetone derivatives class；B. portion spends the purple laser of cyanines class
Sensitizing dye；C. the purple laser sensitizing dye containing styryl structures；D. the purple laser sensitizing dye of coumarin derivative class；
（a）（b）；
Initiator is organic titanic compound；Described photosensitive elastomer body layer（2）In sensitizer refer to Styryl cyanine dyestuff or benzene second
Alkene purple laser sensitizing dye.
2. the flexographic plate of CTP according to claim 1, it is characterised in that：In support（1）With it is photosensitive
Elastomer layer（2）Between be additionally provided with adhesive linkage, for increasing support（1）With photosensitive elastomer body layer（2）Fastness.
3. the flexographic plate of CTP according to claim 1, it is characterised in that：Photosensitive elastomer body layer（2）In
Sensitizer be peacock green, CuPc, disperse orange or the compound for including tertiary amine groups.
4. the flexographic plate of CTP according to claim 3, it is characterised in that：Include the chemical combination of tertiary amine groups
Thing is N, N- diethyl-to dimethylamino benzamide,（4- dimethylamino phenyls）-（1- piperidyls）- ketone or（4- diformazans
Aminophenyl）-（4- morpholinyls）Any of-ketone or at least two.
5. the flexographic plate of CTP according to claim 1, it is characterised in that：The photosensitive elastomer body layer
（2）In also include any of antioxidant, hot inhibitor, releasing agent, levelling agent or dyestuff or at least two.
6. the flexographic plate of CTP according to claim 1, it is characterised in that：The adherent layer（3）It is used
Film-forming resin is polyamide, and the inside adds levelling agent or/and surfactant.
7. the flexographic plate of CTP according to claim 1, it is characterised in that：Diaphragm（4）For thin transparent
Film, is more than 80%, film thickness is 75-175 μm to wave-length coverage in 350-450nm light transmission rate.
8. the flexographic plate of CTP according to claim 1, it is characterised in that：The diaphragm（4）Be with
The diaphragm of lower material：It is poly- to have supportted the carbonic ester of naphthalene -2,6- bis-, polyethylene terephthalate, polybutylene terephthalate
Any of ester, polyvinyl chloride, polypropylene or makrolon.
9. a kind of preparation method of the flexographic plate of the CTP described in claim 1, it is characterised in that：By photosensitive bullet
Property body layer（2）In each component be proportionally added into extruder, heating, mixing, exhaust knead 2-5 point at 110-150 DEG C
Photosensitive elastomer body is made through die head in clock, extrusion（2）0.5-6.35mm thickness sheet material, then by photosensitive elastomer body（2）Piece
The heating pressurization of material surface is covered with support（1）With contain adherent layer（3）And diaphragm（4）Anti-sticking composite membrane, just obtaining can be with
The flexographic plate of CTP.
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| CN201310710866.7A CN104723717B (en) | 2013-12-19 | 2013-12-19 | A kind of flexographic plate of CTP and preparation method thereof |
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| CN201310710866.7A CN104723717B (en) | 2013-12-19 | 2013-12-19 | A kind of flexographic plate of CTP and preparation method thereof |
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| CN104723717B true CN104723717B (en) | 2017-08-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10108087B2 (en) * | 2016-03-11 | 2018-10-23 | Macdermid Graphics Solutions Llc | Method of improving light stability of flexographic printing plates featuring flat top dots |
| US10599035B2 (en) * | 2017-04-12 | 2020-03-24 | Macdermid Graphics Solutions, Llc | Method of improving light stability of flexographic printing plates featuring flat top dots |
| CN109466201B (en) * | 2017-09-07 | 2020-10-27 | 乐凯华光印刷科技有限公司 | Regenerated flexible plate and preparation method thereof |
| CN111319372B (en) * | 2018-12-14 | 2021-10-15 | 乐凯华光印刷科技有限公司 | Water-washing flexographic plate support body and preparation method thereof |
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