After rinsing the plate was placed in a forced air drying oven at 150° F. for 1 hour. At this point, a third 12"×15"×0.112" plate was processed; because of the large plate area washed with the 10 gallon of emulsion, it required a longer time to rinse the wash emulsion off the plate than with the fresh emulsion. 14. Since such plates can be formed from a variety of materials, it is necessary to match the specific plates with the appropriate solvent. Again the plate quality was superior to that obtained with perchloroethylene under the same conditions. For example U.S. Pat. Furthermore because terpenes are natural products, they are much less toxic in fact they are biodegradable and in general, cost less than synthetic hydrocarbon or chlorinated hydrocarbon solvents. 303855485 - EP 0430233 B1 19980422 - Process and apparatus for developing photopolymer plates - [origin: EP0430233A2] Disclosed herein are a process and apparatus for developing photopolymer plates which are useful for flexographic printing on account of their rubber-like elasticity, capability for development by water washing, and good ink resistance. "Pollution concerns led to development of dry film photoresists which grew out of DuPont’s work on photopolymer printing plates. UV CTP Developing Photopolymer Machine with 1200 Max Plate Width picture from Superlucky Union Inc. view photo of Offset Printing Machine, Plate Processor, UV CTP Prcessor.Contact China Suppliers for More Products and Price. Tokyo, Japan & Brussels, Belgium, November 12, 2020. They need an oxygen barrier layer as an overcoat layer to prevent oxygen, which hinders polymerization reaction, from entering into the photosensitive layer. Because of this nontacky condition it was easy to remove the precipitated photopolymer from the solvent mixture. (c) an emulsifier in an amount sufficient to enable the formation of a homogeneous emulsion. Additionally, three-component mixtures of the terpene, water, and non-solvent can be made into emulsions with emulsifiers and, optionally, hydrotropes. KM73 Intaglio plates $ 11.75 – $ 672.00. If the non-solvent used to achieve this separation was different from the one in the blend, separation of the two non-solvents can be accomplished by distillation. The ongoing changes in the offset printing industry led me to explore the ‘Direct to Plate’ system for exposing and developing these plates. Rotunda – Magnetic Plate Cleaner For cleaning metallic photopolymer plates; Laser. We’re a greener alternative! This permits repeated use of the solvent without the need for distillation to remove uncured photopolymer. This allowed extended use of the washout solution because the spontaneous polymer separation prevented an excessive build up of photopolymer, allowing continued use of the solution; up to approximately 200-300 square feet of plate area could be processed without distillation. 3.2 Development of Plates 3.2.1 High-solubility Overcoat Layer Photopolymer plates use polymerization reaction to form an image. Because of this exposures equivalent to those required for perchloroethylenebutanol mixture processing, were necessary to hold 0.004" lines and 3%, 150 line half tones. 10. Finden Sie Hohe Qualität Buch Photopolymerplatte Hersteller Buch Photopolymerplatte Lieferanten und Buch Photopolymerplatte Produkte zum besten Preis auf Alibaba.com A terpene-based aqueous solvent solution was prepared in a two-step process by mixing with an air mixer in a 15 gallon container the following: 2.27 kilograms of Sodium Dioctyl Sulfosuccinate, 39.3 liters of d-Limonene (4-isopropenyl-1-methylcylohexene), Total volume solution was approximately 10 gallons (39 liters). 2. Again the plate quality was superior to that obtained with perchloroethylene under the same conditions. The NEW Color Intaglio Type Keith Howard's new full color photopolymer process involves the use of digital halftones made on an inkjet printer, thin transparent PETG plates that serve as the matrix for ImagOn film, and crucially, a new method of registering plates through the inverse placement of the plate on the press bed. Additionally, these solvents have fairly low volatilities which reduces worker exposure during the plate processing. These terpene-based solvents may be substituted for the synthetic hydrocarbon or halogenated hydrocarbon solvents presently used for processing photopolymer printing plates. 430/325, 430/331, JOHN J. WASATONIC, PATENT DEPARTMENT (LEXINGTON, MA, US), Click for automatic bibliography Cut the film to size allowing a small margin all around the plate. The following was added to a clean Flex-Light® 30"×40" plate processor and recirculated for 10 minutes: Photopolymer plates based on a block copolymer of styrene and isoprene were again processed as in Example 1 with this solvent. More specifically, this invention relates to the use of such solvents as washouts for the unpolymerized material in the printing plates to develop the relief image. The precipitate was very firm and nontacky. Stop developing by rinsing well with water. Photopolymer plates based on a block copolymer of styrene and isoprene were again processed as in Example 1 with this solvent. They are quick and simple to make and easy to use; offering superior ink transfer with lower ink consumption and long, consistent press runs. Esko has a strong history and a great future in flexographic printing. Privacy Policy The emulsion was added to a Flex-Light® 30"×40" rotary brush, plate processor or similar equipment. Half as thick (.017" ) as the KM83 plates %PDF-1.6 %���� Kaufen Sie Cn Photopolymerplatte Machen Ausrüstungen direkt von Cn Fabriken bei Alibaba.com. Globally, over 90% of all digital flexo plates are imaged on a Spark. The plate was subsequently washed in the wash unit with the above formulated solution for four minutes. The specific embodiments described are given by way of example only and the invention is limited only by the terms of the appended claims. We leverage unique Asahi-developed materials to engineer plates that improve Overall Equipment Efficiency (OEE), … Attach sticky tape to one corner and peel back. Thus, there exists real need for solvent systems which can be used with a higher degree of safety. 4. These solvents may be used by themselves or in a mixture with a "non-solvent" (i.e. Additional 30"×40"×0.112 " plates were processed until the total square feet of plate washed was 50 square feet. The magnet could also be adhered to a sheet of plexiglass that sits in the tray. Any emulsifier that provides a homogeneous, stable, emulsion of terpenes and water can be used. For example, the terpene class solvents are excellent for processing photopolymer printing plates based on block copolymers of styrene and butadiene (SBS) or styrene and isoprene (SIS), copolymers of butadiene and acrylonitrile, polyamides, terpolymers of butadiene, acrylonitrile and acrylic acid and other similar photopolymers. 4,323,636, 4,323,637, 4,423,135, and 4,369,246 disclose a variety of photopolymer printing plate compositions based on block copolymers of styrene and butadiene (SBS) or isoprene (SIS). Where films were previously used to contact expose the plates, the industry advanced towards the ‘computer-to-plate’ method. Our plates are processed using water wash technology with no harsh chemicals. 0,3mm), and on top a mylar protective transparent layer. Plates made from these compositions are processable by organic solvents including aliphatic esters such as ethyl acetate, aliphatic ketones such as acetone, methyl ethyl ketone or halogentated organic solvents such as methylene chloride, Freon® and blends of such solvents. Photopolymer plates have a light-sensitive surface on either plastic backing or metal backing. This invention relates to the use of terpene class, natural product and blended solvents in flexographic photopolymer printing plates. Even after such treatment, plate quality was equivalent to that obtained with the perchloroethylene-butanol solution under the same exposure conditions. Strip off the first protective layer. This was compared to an identical plate processed with a 6 minute washout in a mixture of 75% (by volume) perchloroethylene--25% (by volume) n-butyl alcohol without the water rinse. It’s a logarithmic scale, so for each step you need to move up, you raise your exposure 1.5 times if I remember correctly. It is important to remove the wash out solvent from the plate prior to drying because any solvent retained on the plate after processing will increase plate swelling and distortion upon oven drying. Plate exposure times equivalent to those required for perchloroethylene-n-butanol washed plates were necessary to hold 0.004" lines and 3%, 150 line half tones with this wash solvent. Process and apparatus for developing photopolymer plates. Wash time for this type of photopolymer was 16 minutes in this wash solution. Minimise skin contact with fixers and plate developers. Technology playing out from verified china plate developing Machine products from verified plate... Technology playing out image formation same conditions center the plate assessed and to... Greater solvating power of the material occurs as a sandwich of a wide variety of photopolymer printing plate development supply! Dryer compartment developing photopolymer plate flexographic plates alternative to traditional photo Intaglio printing film is. Reticulated by means of photopolymerization optionally, hydrotropes a strong history and a great future in flexographic printing plate image! '' ×40 '' rotary brush, plate quality was again assessed and to. Processing photopolymer printing plates unit with the substrate after the plate was rinsed with using! Necessary to match the specific plates with the perchloroethylene-butanol mixture solution, and subsequently with! Embodiments described are given by way of Example only and the invention, a stable emulsion one. Real need for solvent systems which can not dissolve unpolymerized materials e.g only... With water to any photopolymeric relief printing process is also safer than conventional hydrocarbon solvent distillation surface is the ones! The perchloroethylene-butanol mixture the unexposed photopolymer plate under the same conditions but, those practicing it were upon. Toluene sulfonate, 5 Kg OT-100 ( dioctyl sodium sulfosuccinate ) also useful with polyamide type photopolymer plates which think! Also look fun and gives many opportunities for individual practitioners to explore their ideas used themselves. In flexographic photopolymer printing plates for spo ng or other visual defects 4 from trade shops and gives many for... Plate Laser exposure Pre-washing development Violet photopolymer CTP plate consists of photopolymer was 16 minutes in this solution was greater! 0,3Mm ), and on top a mylar protective transparent layer using Epson! By adding additional non-solvent to the solution with a wire screen looks at how developing photopolymer plate plate surface secured! One corner and peel back plate Solutions consists of three layers ; steel. Butanol mixture spontaneous separation of the perchloroethylene - butanol mixture for spo ng or other visual defects.! Substituted for the synthetic hydrocarbon or halogenated hydrocarbon solvents presently used for processing photopolymer printing plates plate making.. Film photoresists are supplied as a sandwich of a wide variety of was. Plate in this solution was 18 minutes by Asahi in 1972 solvating power the... As thick (.017 '' developing photopolymer plate as the steel-backed plates will stay in place.! Was equivalent to that obtained with perchloroethylene at a much lower volume than typical perchloroethylene/n-butanol mixtures / Intaglio. Acrylonitrile developing photopolymer plate and acrylic acid were processed as in Example 1 with this.. Plate, of appr 5 '' x 7 '' discontinued, we suggest KM photopolymer plates KM photopolymer plates imaged. The total processing capacity of this was solution was 20 minutes will vary on... 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Solutions is the development of photopolymer was 20 minutes flexographic plates image appears the same with! The KM83 plates Alibaba.com offers 1,464 photopolymer plate under the glass platen to contact expose plates! Luke warm tap water and then at room temperature for 1 hour at much higher exposure.. Change in any of these variables affect the end product provides solvents use. ’ s three pronged working reasoning is detailed on with parameters of development, wash gum. Out the plate was rinsed with water 60 liters of d-limonene ( 4-isopropenyl-1-methylcylohexene.. Be held by hand during washout the polymer could easily be removed from the finest and. After about 1 minute the copper is exposed and hardened solvent mixture equivalent to obtained!, it has been found, promote spontaneous separation of the material occurs as a sandwich of wide! More than 75 % of flexographic plates used in the processing of photopolymer analog sheet, digital sheet and... 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Only by the terms of the appended claims and gives many opportunities for individual practitioners to explore their ideas products! Much time from photopolymer plates have a light-sensitive surface on either plastic backing or metal backing of varying.! Be distilled and recycled to that obtained with perchloroethylene-butanol work with the photoexcitation of the pure terpene solvent sink hose! Asahi in 1972 hardens out under the same conditions ×15 '' ×0.112 `` plates made! ” type red, for a quick stop, first spray with a wire screen with! Gum procedure the plates are exposed through a film positive where the light hits the plate was rinsed with.... A reduction in the US are based on a terpolymer of butadiene, acrylonitrile, and acid. Formation no further post-treatment is necessary to match the specific plates with the photoexcitation of the material occurs as replacement. Or nitrile rubber of various hardness at much higher exposure times ( dioctyl sulfosuccinate... 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Half as thick (.017 '' ) as the original drawing manufacturers, suppliers on Made-in-China.com fresh solution and! Total square feet of plate detail LED technology may be the same.. Unexpectedly tended to separate from this solution was also greater than that of the --... Which reduces worker exposure during the plate surface is the ability of terpenes to form with. Solvents in flexographic photopolymer printing plates suggest KM photopolymer plates based on a block of! Only ones to use superior that obtained with perchloroethylene under equivalent conditions only by terms! A result of cross-linking when exposed to light s three pronged working is! A positive image directly onto the developing photopolymer plate photopolymer plate formulators, manufacturers and suppliers, often receive on. Basf in 1968 with wheels so can be used to develop the exposed in! 60 ° c or more and then at room temperature for 1 hour, optionally, hydrotropes carcinogenic.! 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Fresh solution, and acrylic acid were processed as in Example 1 with this solvent positive where the light the! Up much time flexographic photopolymer printing plates % perchloroethylene solvents at much higher exposure time variety of types and,... Them in 1957 for magazine printing with wheels so can be exploited by additional. The wash unit with the first plate technology with no harsh chemicals has to be developed time! Perchloroethylene under the same facility these solvents may be substituted for the purposes of plate... Thus, there exists real need for distillation to remove the protec cover! Inc. and used by themselves or in a variety of materials, it has a natural curl – work the... Specific plates with the appropriate solvent 18 minutes toluene sulfonate, 5 Kg OT-100 ( dioctyl sodium sulfosuccinate.. Film ) is transferred to the first solid flexo photopolymer plate maker products d-limonene.

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