Printing rubber plate

Figure 19. Thermoformed rubber printing plate and matrix by the Photopolymer...

A number of photopolymer printing plates are already known. Their basic structures are to combine one of the general purpose resins such as cellulose (1), polyamide (2J, polyester, poly urethane (3j, polyvinyl alcohol (4), synthetic rubber (5) and the like with photopolymerizing vinyl monomer, photopolymerization initiator and so on. Any one of the plates of such structures can be used as a press plate, but they can not be used as an original plate for duplicate plate owing to their insufficient hardness, toughness and the similar negative properties. 

The Photopolymer Plate of over 85° Shore D hardness can stand temperatures over 160°C, and it could be successfully used as a master plate for making thermoformed matrix of phenol group resin to be used for thermoformed polymer printing plates such as rubber plates and the like under conditions of 30 kg/cm2 pressure... 

This is a relief printing process in which the image areas are raised above the level of the non-image areas and transferred from the inked printing plate to the metal surface by means of an intermediate resilient rubber surface. 

Photo-crosslinking of negative resists is exemplified by the bisazide-cyclized rubber system widely used in the production of offset printing plates. The system hardens when exposed to actinic rays. 

CAS 1189-08-8 EINECS/ELINCS 214-711-0 Uses Crosslinking monomer for preparation of inks, photoresists for printed circuit boards, photopolymer printing plates, wire and cable coalings reactive diluent for PVC plastisols, rubber crosslinking, glass reinforc plastics, adhesives, sealants, impregnated wood composites, and other surf, coatings... 

CAS 109-16-0 EINECS/ELINCS 203-652-6 Uses Adduct monomer for preparation of anaerobic adhesives and sealants, castings, plastisols, coatings, fibers, cast acrylic sheets, elec, photoresists, rubber prods., dental resins, overprint varnishes, and flexographic printing plates crosslinks and copolymerizes with other vinyl monomers imparting solv. resist., heat resist., and hardness Properties Pt-Co 100 max. clear liq. m.w. 286 vise. 10 mPa-s flash pt. 

Features Highly effective at low usage levels will not cause swelling ot rubber rollers or polymer print plates contains no min. oil exc. tor use in clear or pigmented systems sensitive to oil or silicone Regulatory SARA nonreportabie... 

Uses Crosslinking agent for rubber vulcanization, moisture barrier films and coatings, photopolymer printing plates and letterpress inks, conversion coatings and adhesives crosslinked actylic/vinyl resin comonomer syn. resin modifier plastisols photosensitive resins textile modifier... 

Flexographic printing n. A rotary process employing flexible rubber or elastomeric printing plates adhered to a roll, inked by a screen roll which in turn is coated from a feed roll immersed in ink. 

Letterpress printing The process used for paper is adapted to plastics by the use of special inks and transfer rolls, and possibly a modification of press speed. Flexible printing plates are usually employed, made of vinyl or rubber. It is the oldest method of printing flat plastic substrates and uses a press for rehef printing ffom metal type or raised surfaces formed ffom wood, metal, or linoleum. Leach RH, Pierce RJ, Hickman EP, Mackenzie MJ, Smith HG (eds) (1993) Printing ink manual, 5th edn. Blueprint, New York. 

Offset of- Set (ca. 1555) n. An indirect form of printing in which the ink is transferred from the printing plate to a rubber blanket and subsequently to the sheet. 

Rubber-plate printing n. A marking method sometimes employed for intricate parts such as molded terminal blocks. Numbers, instructions, etc., are stamped with conventional rubber stamps or printing plates. 

Major Applications Recording materials, waveguides, thin solid films, photographic materials, printing plates, inks, 10-12 toners, detergents,i4 corrosion inhibitors, rubber,is textiles,i -i hair dyes2o... 

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