CN109466201A - A kind of regeneration flexographic plate and preparation method thereof - Google Patents
A kind of regeneration flexographic plate and preparation method thereof Download PDFInfo
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- CN109466201A CN109466201A CN201710801758.9A CN201710801758A CN109466201A CN 109466201 A CN109466201 A CN 109466201A CN 201710801758 A CN201710801758 A CN 201710801758A CN 109466201 A CN109466201 A CN 109466201A
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- flexographic plate
- regeneration
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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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of preparation methods for regenerating flexographic plate, the specific steps are as follows: (1) distills old developer solution by high-temperature pressure-reduction and bottoms are made, bottoms, the monomer added and initiator are kneaded in mixer；(2) the good material of mixing is placed between the compression roller of open type plastic purificating set, is kneaded；(3) the good sheet elastomers both sides of mill are covered with transparent PET supporter, put it into the mold being preheated and cover pressing plate, is then put into vulcanizing press together with mold；(4) it tears the transparent PET sheet base in elastomer both sides off, this photosensitive elastomer body both sides is then covered with supporter with adhesive layer respectively and with the protective film of adherent layer, last available regeneration flexographic plate.Raw flexographic plate provided by the invention and preparation method thereof, can be suitable for the flexographic plate regeneration of all producers production, and developing system can be any solvent developer solution.
Description
Technical field
The invention belongs to printing equipment technology, and in particular to a kind of regeneration flexographic plate and preparation method thereof.
Background technique
Flexible version printing is effectively reduced and was printed because using environmentally protective ink, alcohol ink, UV ink etc. to print ink
VOC emission in journey is practically free of heavy metal in layer of ink, healthy and safe.Flexographic plate is generally used for packages printing, especially suitable for
The packages printing of the relationships such as daily use chemicals, food, drug, cosmetics life and health safety, while for anti-fake, transfer, security and electricity
The specialty printings such as sub- component.Flexographic plate pressrun is high, and print machine simply easily combines, with short production cycle, and labor efficiency is high, by wide
Big press is paid attention to and is promoted.
Flexible resin plates include hard resin version and liquid resin version.It is in the market mostly hard resin version, it can according to thickness
It is divided into thick version (3.94mm~7.00mm) and thin version (1.14mm~2.84mm) etc..
Flexographic plate has more than 700 ten thousand square metres of consumption every year, and flexible plate making development can generate a large amount of residue and give up
Developer solution, waste developing solution can be recycled by high temperature distillation, be reused, however a large amount of residue is very difficult, anxious
Need to find the method for processing flexographic plate residue.
Summary of the invention
The present invention aiming at the problems existing in the prior art, provides a kind of regeneration flexographic plate and preparation method thereof, will develop
When dissolution in developer solution without overexposure crosslinking elastomer, by high-temperature pressure-reduction be distilled to recover flexographic plate residue, add
Monomer and initiator appropriate apply support membrane and protective film applicatory and prepare again by mixing at uniform elastomer shape
A kind of regeneration flexographic plate out can be used as the use of normal flexible version.
The object of the present invention is achieved in the following manner:
A kind of preparation method regenerating flexographic plate, the specific steps are as follows:
(1) old developer solution is distilled by high-temperature pressure-reduction and bottoms is made, bottoms, the monomer added and initiator are existed
In 90-150 DEG C of mixing 0.5-2h in mixer, it is cooled to room temperature, elastomeric mass is taken out；
(2) the good material of mixing is placed between the compression roller of open type plastic purificating set, 40-90 DEG C of mixing 10-30min, is kneaded equal
It is even, elastomer is finally smelt to the sheet of suitable thickness；
(3) the good sheet elastomers of mill are cut into required weight, both sides are covered with transparent PET supporter, put it into
In the mold being preheated and pressing plate is covered, is then put into vulcanizing press together with mold and is forced into 20MPa in 80-160 DEG C,
Constant temperature 10min；
(4) it opens recirculated cooling water to be sufficiently cooled to room temperature, followed by opening mold takes out flexographic plate；Tear elastomer off
This photosensitive elastomer body both sides is then covered with the supporter with adhesive layer respectively and had anti-sticking by the transparent PET sheet base in both sides
The protective film of layer is then placed in the operation that hot pressing, cold pressing are repeated in preheated mold, last available with a thickness of 1.70-
The regeneration flexographic plate of 5.50mm.
The condition of the high-temperature pressure-reduction distillation are as follows: 150-200 DEG C of temperature, pressure -0.07--0.09Mpa.
The monomer is simple function group or multi-functional acrylic ester monomer, such as Tianjin proud son of heaven Chemical Co., Ltd.
1,6 hexanediol diacrylate, 1,4 butanediol diacrylate, glycerol propoxylate triacrylate, trimethylolpropane tris
Acrylate, ethoxylated trimethylolpropane triacrylate, propoxylation trimethylolpropane trimethacrylate, poly- second two
Alcohol (200) acrylate, neopentylglycol diacrylate, tripropylene glycol diacrylate, two propylene of phthalic acid diethanol
Acid esters etc.；The 2- phenoxyethyl acrylate of Zhuhai Changxing chemical material Co., Ltd, 3,3,5- trimethylcyclohexyl propylene
It is acid esters, ethoxyethoxyethyl acrylate, lauric acid acrylate, stearic acid acrylate, isodecyl acrylate, different
Decyl methacrylate, 2- phenoxyethyl methacrylate, laurel acid methacrylate, benzyl acrylate, two
Propylene glycol diacrylate, tripropylene glycol diacrylate, ethoxyquin 1,6 hexanediol diacrylate, polyethylene glycol (600)
Diacrylate, 2- methyl-1,3-propanediol diacrylate, ethylene glycol dimethacrylate, ethoxylated bisphenol A dimethyl
Acrylate, pentaerythritol triacrylate, the third oxidation trimethylolpropane trimethacrylate, three acrylic acid of glycerol propoxylate
Ester, trimethylol-propane trimethacrylate, ethoxyquin trimethylol-propane trimethacrylate, pentaerythrite tetrapropylene
Acid esters, ethoxyquin pentaerythritol tetraacrylate, two-trimethylolpropane tetra-acrylates etc.；The village Xin Zhong Chemical Co., Ltd.
Ethyoxyl polyethylene glycol o-phenyl phenol acrylate, 400 acrylate of methoxy poly (ethylene glycol), phenoxy group diethylene glycol third
Olefin(e) acid ester, 2- acryloyloxyethyl succinate, acrylic acid isostearate, 2- hydroxyl 3- acryloyloxymethyl acryloyl-oxy
Base propane, polyethylene glycol #1000 diacrylate, propoxylation ethoxylated bisphenol a diacrylate, two propylene of tripropylene glycol
Acid esters, 1.9- nonanediol diacrylate, Tricyclodecane Dimethanol diacrylate, three acrylic acid of ethoxylation cyamelide
Ester, ethoxylated glycerol triacrylate, dimethoxy propane tetrapropylene acid, tetramethoxy methane tetraacrylate, two seasons penta
Six acrylate of tetrol etc..
The monomer additional amount is the 0.5-2% of bottoms, monomer and initiator total amount.
The initiator is benzophenone, thioxanthones, benzoin and its derivatives, acetophenone derivs or acyl group
At least one of phosphine oxide class photoinitiator, such as the rich Chemical Co., Ltd.'s benzophenone of Quzhou City's riel such as hexichol first
Ketone, 2,4 dihydroxyl benzophenone, 4- chlorobenzophenone, 4- phenyl benzophenone, 4,4 '-two (lignocaine) benzophenone
Deng；Nanjing Jin Lu Chemical Co., Ltd. thioxanthones such as 2- isopropyl thioxanthone, 2,4- diethyl thioxanthone etc.；Nanjing
Jin Lu Chemical Co., Ltd. benzoin and its derivatives such as styrax, benzoin dimethylether, benzoin ethyl ether, benzoin isopropyl
Ether, benzoin isobutyl ether etc.；Jingjiang Hong Tai Chemical Co., Ltd. acetophenone derivs such as diphenylethan, dimethoxy -1 2,2-,
2- benzyl phenyl ketone etc.；Nanjing Jin Lu Chemical Co., Ltd. acylphosphine oxide class such as aroyl phosphine oxide, 2,4,6- trimethyl
Benzoyl-diphenyl phosphine oxide etc..
The initiator additional amount is the 0.2-1% of bottoms, monomer and initiator total amount.
The supporter with adhesive layer is the polyester film base with adhesive layer.
The protective film with adherent layer is the frosted polyester film base with adherent layer.
A kind of regeneration flexographic plate, including photosensitive elastomer body layer, in the supporter that photosensitive elastomer body layer bottom plays a supportive role,
Play the protective layer of protection photosensitive elastomer body at the top of photosensitive elastomer body layer, and is located at photosensitive elastomer body layer and protective layer
The adherent layer of paper and the adhesive layer for being connected supporter and photosensitive elastomer body layer, the photosensitive elastomer body layer are such as claim 1
The old developer solution distills bottoms obtained through high-temperature pressure-reduction, adds monomer and initiator is kneaded and is made.
Compared with the existing technology, it is raw can be suitable for all producers for raw flexographic plate provided by the invention and preparation method thereof
The flexographic plate of production regenerates, and developing system can be any solvent developer solution.It will dissolve when development in developer solution without overexposure
The elastomer of photo-crosslinking can be used as photosensitive elastomer system into a kind of regeneration flexographic plate by the residue that high-temperature pressure-reduction is distilled to recover,
It can be used as the use of normal flexible version.Of version made of after exposure, site also proper energy reach 5%-93%.Recycling residue is made into again
Plate-making effect of the raw flexographic plate slightly poorer to master material, but its independent point, independent lines, hardness and site reduction etc. can satisfy
Print request.
Specific embodiment
Following embodiment is intended to further illustrate the contents of the present invention, but does not limit the scope of the invention.
Monomer and initiator used are that commonly UV light-cured acrylic class monomer and light draw during preparing flexographic plate
Send out agent.
Embodiment 1:
Certain family makes a plate company using magnificent II flexographic plate of light R394-, and developer solution is quick morning environment-friendly type developer solution, is developed using section
Luxuriant cover-plate type plate processing machine.Old developer solution distills under 180 DEG C and -0.08Mpa, and 0.5% 1,6 hexylene glycol acrylic acid are added in residue
Ester (Tianjin proud son of heaven Chemical Co., Ltd.) and 1.0% 2,2- dimethoxy -1,2- diphenylethan (are commonly called as 651, the macro Thailand of Jingjiang
Chemical Co., Ltd.), 2h is kneaded at 90 DEG C, is cooled to room temperature, elastomeric mass is taken out；The good material of mixing is placed on opening
Between the compression roller of formula plastics processing mill, 50 DEG C of mixing 10min are kneaded uniformly, elastomer are finally smelt to the sheet of suitable thickness；It will
The good sheet elastomers of mill cut required weight, both sides are covered with transparent PET supporter, put it into and have been preheated
In mold and pressing plate is covered, is then put into vulcanizing press together with mold and is forced into 20MPa, constant temperature 10min in 80 DEG C；It opens
Recirculated cooling water is sufficiently cooled to room temperature, and followed by opening mold takes out flexographic plate；It is transparent to tear elastomer both sides off
This photosensitive elastomer body both sides is then covered with polyester film base with adhesive layer and with the frosted of adherent layer by PET sheet base respectively
Polyester film base is then placed in the operation for repeating hot pressing, cold pressing in preheated mold, is finally pressed into a thickness of 3.94mm again
Raw flexographic plate.
Using section's cyclopentadienyl cover board plate processing machine, quick morning environmental protection developer solution and section's cyclopentadienyl printer, washed through back exposing-main exposure-
Version-drying-post-exposure-except viscous processing, this regenerated flexographic plate site reduction can reach 5%-93%, independent point 0.30mm,
Each performances such as independent lines 0.30mm, exposure latitude 32.4% meet equal thickness plate print request.
Embodiment 2
The flexible plate making company of certain wife and children, development use cover-plate type plate processing machine, and developer solution is tetrachloro-ethylene class, and plate is only
Use a kind of model of magnificent light flexographic plate R394Q- II.Old developer solution distills under 150 DEG C and -0.07Mpa, and the solvent steamed is again
It recycles, solid residue is photosensitive elastomer body.Recycling residue adds 2.0% trimethylol-propane trimethacrylate body (day
Saliva proud son of heaven Chemical Co., Ltd.) and 1,6 hexylene glycol crylic acid ester mixture monomers (Tianjin proud son of heaven Chemical Co., Ltd.) and 1.0%
2,2- dimethoxy -1,2- diphenylethan photoinitiators (Jingjiang Hong Tai Chemical Co., Ltd.) are kneaded 0.5h at 150 DEG C,
It is cooled to room temperature, elastomeric mass is taken out；The good material of mixing is placed between the compression roller of open type plastic purificating set, 40 DEG C mixed
30min is refined, is kneaded uniformly, elastomer is finally smelt to the sheet of suitable thickness；Needed for the good sheet elastomers of mill are cut
The weight wanted, both sides are covered with transparent PET supporter, put it into the mold being preheated and cover pressing plate, then together with
Mold, which is put into vulcanizing press, is forced into 20MPa, constant temperature 10min in 100 DEG C；Recirculated cooling water is opened sufficiently to be cooled to
Room temperature, followed by opening mold take out flexographic plate；The transparent PET sheet base in elastomer both sides is torn off, then by this photosensitive elastomer
Body both sides are covered with the polyester film base with adhesive layer and the frosted polyester film base with adherent layer respectively, are then placed in preheated
The operation that hot pressing, cold pressing are repeated in mold, is finally pressed into the regeneration flexographic plate with a thickness of 3.94mm.
Available after plate-making: site restores available 5%-90%, independent point 0.30mm, independent lines 0.30mm, exposure
Each performance such as tolerance 35.4% meets equal thickness plate print request.
Embodiment 3
Certain flexographic plate using Du Pont HDC type 3.94mm thickness, development use section's cyclopentadienyl line-connection type plate processing machine and quick morning ring
Protect developer solution.Old developer solution distills under 160 DEG C and -0.09Mpa, and the solvent steamed recycles again, and solid residue is sense
Optic elastic body.Recycling residue adds 0.5% glycerol propoxylate triacrylate (Zhuhai Changxing chemical material Co., Ltd) and three
Hydroxy acrylate (Zhuhai Changxing chemical material Co., Ltd) mix monomer and 0.2% Benzophenone photoinitiator (Quzhou City
The rich Chemical Co., Ltd. of riel), 1h is kneaded at 130 DEG C, is cooled to room temperature, elastomeric mass is taken out；By the good material of mixing
It is placed between the compression roller of open type plastic purificating set, 90 DEG C of mixing 20min, is kneaded uniformly, elastomer is finally smelt suitable thickness
Sheet；The good sheet elastomers of mill are cut into required weight, both sides are covered with transparent PET supporter, put it into
In the mold being preheated and pressing plate is covered, is then put into vulcanizing press together with mold and is forced into 20MPa in 120 DEG C, it is permanent
Warm 10min；It opens recirculated cooling water to be sufficiently cooled to room temperature, followed by opening mold takes out flexographic plate；Tear elasticity off
This photosensitive elastomer body both sides is then covered with the polyester film base with adhesive layer respectively and had by the transparent PET sheet base in body both sides
The frosted polyester film base of adherent layer is then placed in the operation for repeating hot pressing, cold pressing in preheated mold, is finally pressed into thickness
For the regeneration flexographic plate of 3.94mm.
Available after plate-making: site restores available 5%-93%, independent point 0.30mm, independent lines 0.20mm, exposure
Each performance such as tolerance 28.0% meets equal thickness plate print request.
Embodiment 4
Certain bigger plate-making company uses the digital version of Fu Linte FAC type 1.70mm, this company has a Cologne man of virtue and ability to connect
Wire type plate processing machine, quick morning environment-friendly type developer solution, when development, can peel off black film in advance.Old developer solution is in 170 DEG C and -0.075Mpa
Lower distillation, the solvent steamed recycle again, and solid residue is photosensitive elastomer body.Recycling residue add 1.5% 1,6 oneself two
(Quzhou City's riel is rich for alcohol acrylate monomer (Tianjin proud son of heaven Chemical Co., Ltd.) and 0.4% 1- hydroxy-cyclohexyl benzyl ketone
Chemical Co., Ltd.) and benzophenone (the rich Chemical Co., Ltd. of Quzhou City's riel) mix photoinitiator, be kneaded at 130 DEG C
1h is cooled to room temperature, and elastomeric mass is taken out；The good material of mixing is placed between the compression roller of open type plastic purificating set, 80
DEG C be kneaded 20min, be kneaded uniformly, elastomer is finally smelt to the sheet of suitable thickness；The good sheet elastomers of mill are cut
Required weight, both sides are covered with transparent PET supporter, put it into the mold being preheated and cover pressing plate, then
It is put into vulcanizing press together with mold and is forced into 20MPa, constant temperature 10min in 160 DEG C；Unlatching recirculated cooling water sufficiently carries out cold
But to room temperature, followed by opening mold takes out flexographic plate；Tear the transparent PET sheet base in elastomer both sides off, it is then that this is photosensitive
Elastomer both sides are covered with the polyester film base with adhesive layer and the frosted polyester film base with adherent layer respectively, are then placed in preheating
The operation that hot pressing, cold pressing are repeated in good mold, is finally pressed into the regeneration flexographic plate with a thickness of 2.28mm.
Available after plate-making: site restores available 5%-93%, independent point 0.20mm, independent lines 0.20mm, exposure
Each performance such as tolerance 36.6% meets equal thickness plate print request.
Embodiment 5
Certain flexographic plate using Du Pont HDC type 3.94mm thickness, development use section's cyclopentadienyl line-connection type plate processing machine and quick morning ring
Protect developer solution.Old developer solution distills under 160 DEG C and -0.09Mpa, and the solvent steamed recycles again, and solid residue is sense
Optic elastic body.Recycling residue adds 1.2% 3,3,5- trimethylcyclohexyl acrylate (the limited public affairs of Zhuhai Changxing chemical material
Department) and two-trimethylolpropane tetra-acrylates (Zhuhai Changxing chemical material Co., Ltd) mix monomer and 0.2% hexichol first
Ketone photoinitiator (the rich Chemical Co., Ltd. of Quzhou City's riel) is kneaded 0.8h at 125 DEG C, is cooled to room temperature, by elastomer object
Material takes out；The good material of mixing is placed between the compression roller of open type plastic purificating set, 70 DEG C of mixing 15min, is kneaded uniformly, finally
Elastomer is smelt to the sheet of suitable thickness；The good sheet elastomers of mill are cut into required weight, both sides are covered with transparent
PET supporter, put it into the mold being preheated and cover pressing plate, then together with mold be put into vulcanizing press in
120 DEG C are forced into 20MPa, constant temperature 10min；It opens recirculated cooling water to be sufficiently cooled to room temperature, followed by opening mold will
Flexographic plate takes out；It tears the transparent PET sheet base in elastomer both sides off, then this photosensitive elastomer body both sides is covered with respectively with bonding
The polyester film base and frosted polyester film base with adherent layer of layer are then placed in and repeat hot pressing, cold pressing in preheated mold
Operation, is finally pressed into the regeneration flexographic plate with a thickness of 1.70mm.
Available after plate-making: site restores available 5%-93%, independent point 0.30mm, independent lines 0.20mm, exposure
Each performance such as tolerance 35.0% meets equal thickness plate print request.
Embodiment 6
Certain flexographic plate using Du Pont HDC type 3.94mm thickness, development use section's cyclopentadienyl line-connection type plate processing machine and quick morning ring
Protect developer solution.Old developer solution distills under 160 DEG C and -0.09Mpa, and the solvent steamed recycles again, and solid residue is sense
Optic elastic body.Recycling residue adds 1.6% ethoxylated bisphenol A dimethylacrylate (the limited public affairs of Zhuhai Changxing chemical material
Department) and trimethylol-propane trimethacrylate (Zhuhai Changxing chemical material Co., Ltd) mix monomer and 0.6%2- isopropyl
Base thioxanthone photoinitiator (Nanjing Jin Lu Chemical Co., Ltd.) is kneaded 0.8h at 125 DEG C, is cooled to room temperature, will be elastic
Body material takes out；The good material of mixing is placed between the compression roller of open type plastic purificating set, 70 DEG C of mixing 15min, is kneaded uniformly,
Elastomer is finally smelt to the sheet of suitable thickness；The good sheet elastomers of mill are cut into required weight, both sides are covered with
Transparent PET supporter, puts it into the mold being preheated and covers pressing plate, be then put into vulcanizing press together with mold
In 20MPa, constant temperature 10min are forced into 120 DEG C；It opens recirculated cooling water to be sufficiently cooled to room temperature, followed by opening mould
Tool takes out flexographic plate；It tears the transparent PET sheet base in elastomer both sides off, this photosensitive elastomer body both sides is covered with respectively then and is had
The polyester film base of adhesive layer and frosted polyester film base with adherent layer are then placed in preheated mold and repeat hot pressing, cold
The operation of pressure is finally pressed into the regeneration flexographic plate with a thickness of 2.84mm.
Available after plate-making: site restores available 5%-93%, independent point 0.20mm, independent lines 0.20mm, exposure
Each performance such as tolerance 38.3% meets equal thickness plate print request.
Embodiment 7
Certain flexographic plate using Du Pont HDC type 3.94mm thickness, development use section's cyclopentadienyl line-connection type plate processing machine and quick morning ring
Protect developer solution.Old developer solution distills under 160 DEG C and -0.09Mpa, and the solvent steamed recycles again, and solid residue is sense
Optic elastic body.Recycling residue adds the 1.8% ethyoxyl polyethylene glycol o-phenyl phenol acrylate (village Xin Zhong chemistry strain formula meeting
Society) and polyethylene glycol (600) diacrylate (Zhuhai Changxing chemical material Co., Ltd) mix monomer and 0.8% styrax (south
Jing Jin deer Chemical Co., Ltd.) and benzoin isopropyl ether (Nanjing Jin Lu Chemical Co., Ltd.) mix photoinitiator, at 125 DEG C
It is kneaded 0.8h, is cooled to room temperature, elastomeric mass is taken out；By the good material of mixing be placed on open type plastic purificating set compression roller it
Between, 70 DEG C of mixing 15min are kneaded uniformly, elastomer are finally smelt to the sheet of suitable thickness；By the good sheet elastomers of mill
Required weight is cut, both sides are covered with transparent PET supporter, put it into the mold being preheated and cover pressing plate,
It is then put into vulcanizing press together with mold and is forced into 20MPa, constant temperature 10min in 120 DEG C；Open recirculated cooling water sufficiently into
Row is cooled to room temperature, and followed by opening mold takes out flexographic plate；The transparent PET sheet base in elastomer both sides is torn off, then by this
Photosensitive elastomer body both sides are covered with the polyester film base with adhesive layer and the frosted polyester film base with adherent layer respectively, are then placed in
The operation that hot pressing, cold pressing are repeated in preheated mold, is finally pressed into the regeneration flexographic plate with a thickness of 4.70mm.
Available after plate-making: site restores available 5%-93%, independent point 0.20mm, independent lines 0.30mm, exposure
Each performance such as tolerance 32.9% meets equal thickness plate print request.
Embodiment 8
Certain flexographic plate using Du Pont HDC type 3.94mm thickness, development use section's cyclopentadienyl line-connection type plate processing machine and quick morning ring
Protect developer solution.Old developer solution distills under 160 DEG C and -0.09Mpa, and the solvent steamed recycles again, and solid residue is sense
Optic elastic body.Recycling residue add 0.8% ethoxylation cyamelide triacrylate (village Xin Zhong Chemical Co., Ltd.) and
(Jingjiang is macro for tetramethoxy methane tetraacrylate (village Xin Zhong Chemical Co., Ltd.) mix monomer and 0.9% aroyl phosphine oxide
Safe Chemical Co., Ltd.) and 2,4,6- trimethylbenzoy-dipheny phosphine oxide (Jingjiang Hong Tai Chemical Co., Ltd.) mixing
Photoinitiator is kneaded 0.8h at 125 DEG C, is cooled to room temperature, elastomeric mass is taken out；The good material of mixing is placed on opening
Between the compression roller of formula plastics processing mill, 70 DEG C of mixing 15min are kneaded uniformly, elastomer are finally smelt to the sheet of suitable thickness；It will
The good sheet elastomers of mill cut required weight, both sides are covered with transparent PET supporter, put it into and have been preheated
In mold and pressing plate is covered, is then put into vulcanizing press together with mold and is forced into 20MPa, constant temperature 10min in 120 DEG C；It opens
It opens recirculated cooling water to be sufficiently cooled to room temperature, followed by opening mold takes out flexographic plate；It is transparent to tear elastomer both sides off
PET sheet base, this photosensitive elastomer body both sides is then covered with polyester film base with adhesive layer respectively and with the mill of adherent layer
Sand polyester film base is then placed in the operation for repeating hot pressing, cold pressing in preheated mold, is finally pressed into a thickness of 5.50mm's
Regenerate flexographic plate.
Available after plate-making: site restores available 5%-93%, independent point 0.30mm, independent lines 0.30mm, exposure
Each performance such as tolerance 37.4% meets equal thickness plate print request.
Comparative example 1
Version-drying-post-exposure-is washed except viscous processing through back exposing-main exposure-using magnificent light R394- II, and site reduction can
Reach each performances such as 3%-93%, independent point 0.30mm, independent lines 0.20mm, exposure latitude 34.5% and meets print request.
By the above content and comparative example and comparative example it follows that a kind of regeneration flexographic plate disclosed by the invention and
Preparation method can be applicable in any kind of flexographic plate.The present invention distills old developer solution by high-temperature pressure-reduction, distills
Solvents Solvent recycle, bottoms are using preparing a kind of regeneration flexographic plate.The regeneration flexographic plate site of preparation is also
Former, exposure latitude meets the plate of print request.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art,
Without depart from that overall concept of the invention, several changes and improvements can also be made, these also should be considered as of the invention
Protection scope.
Claims (9)
1. a kind of preparation method for regenerating flexographic plate, it is characterised in that: specific step is as follows:
(1) old developer solution is distilled by high-temperature pressure-reduction and bottoms is made, bottoms, the monomer added and initiator are existed
In 90-150 DEG C of mixing 0.5-2h in mixer, it is cooled to room temperature, elastomeric mass is taken out；
(2) the good material of mixing is placed between the compression roller of open type plastic purificating set, 40-90 DEG C of mixing 10-30min, is kneaded equal
It is even, elastomer is finally smelt to the sheet of suitable thickness；
(3) the good sheet elastomers of mill are cut into required weight, both sides are covered with transparent PET supporter, put it into
In the mold being preheated and pressing plate is covered, is then put into vulcanizing press together with mold and is forced into 20MPa in 80-160 DEG C,
Constant temperature 10min；
(4) it opens recirculated cooling water to be sufficiently cooled to room temperature, followed by opening mold takes out flexographic plate；Tear elastomer off
This photosensitive elastomer body both sides is then covered with the supporter with adhesive layer respectively and had anti-sticking by the transparent PET sheet base in both sides
The protective film of layer is then placed in the operation that hot pressing, cold pressing are repeated in preheated mold, last available with a thickness of 1.70-
The regeneration flexographic plate of 5.50mm.
2. the preparation method of regeneration flexographic plate according to claim 1, it is characterised in that: the item of the high-temperature pressure-reduction distillation
Part are as follows: 150-200 DEG C of temperature, pressure -0.07--0.09Mpa.
3. it is according to claim 1 regeneration flexographic plate preparation method, it is characterised in that: the monomer be simple function group or
Multi-functional acrylic ester monomer.
4. the preparation method of regeneration flexographic plate according to claim 1, it is characterised in that: the monomer additional amount is distillation
The 0.5-2% of residue, monomer and initiator total amount.
5. the preparation method of regeneration flexographic plate according to claim 1, it is characterised in that: the initiator is benzophenone
In class, thioxanthones, benzoin and its derivatives, acetophenone derivs or acylphosphine oxide class photoinitiator at least
It is a kind of.
6. the preparation method of regeneration flexographic plate according to claim 1, it is characterised in that: the initiator additional amount is to steam
Evaporate the 0.2-1% of residue, monomer and initiator total amount.
7. the preparation method of regeneration flexographic plate according to claim 1, it is characterised in that: the support with adhesive layer
Body is the polyester film base with adhesive layer.
8. the preparation method of regeneration flexographic plate according to claim 1, it is characterised in that: the protection with adherent layer
Film is the frosted polyester film base with adherent layer.
9. a kind of regeneration flexographic plate, including photosensitive elastomer body layer, in the supporter that photosensitive elastomer body layer bottom plays a supportive role, position
The protective layer of protection photosensitive elastomer body effect at the top of photosensitive elastomer body layer, and it is located at photosensitive elastomer body layer and protective paper
The adherent layer of part and the adhesive layer for being connected supporter and photosensitive elastomer body layer, it is characterised in that: the photosensitive elastomer body layer is such as
Old developer solution described in claim 1 distills bottoms obtained through high-temperature pressure-reduction, adds monomer and initiator is kneaded system
?.
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| CN109466201B (en) | 2020-10-27 |
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