Nyloprint

Photo-polymer letterpress plates were patented by Gates in 1945 but the most successful commercial systems were based on the work of Plambeck in 1956, which led to the introduction in 1957 of Du Pont s Dycril plate and nearly ten years later of the Nyloprint system from BASF. The Dycril and the Nyloprint systems are very similar to the exposure and development of a photographic plate but there is another popular method of producing such plates using a liquid photo-polymer system. Letterpress plates for newspapers based on liquid photo-polymers were introduced in 1971. 

In the context of printing plastics, the Nyloprint photo-polymer plate appears to be the most popular in the areas of narrow-web rotary-letterpress label printing and rotary-offset letterpress printing of plastic tubs and tubes. 

BASF Nyloprint Polyamide Bifunctional acrylamide Solid Alcohol. 

These results can be easily explained by examining Figure 14 and 15. The first figure shows the overlap between the emission band of the BASF Nyloprint bulb (a light source commonly employed in printing plate technology) and the absorption bands of BDMB, I and II,... 

Figure 13. Comparison of BOMB and I in a flexographic printing plate (radiation source BASF Nyloprint bulb, 350-400 nm).

Figure 14. Emission spectrum of a BASF Nyloprint bulb vs. absorption of BDK (I), MMMP (II) and BDMB.

Nyloprint, of BASF is a solid type of photosensitizer compound coated plate, around 1967. The solid photopolymerizing material is a combination of an alcohol-soluble polyamide (such as a polyamide copolymer of hexamethylene diammonium adipate and e-caprolactam), a vinyl monomer (such as bis-acrylamide, hexamethylene bis-acrylamide, triethylene glycol diacrylate, etc.), a photo-initiator such as benzoin methyl ether, and an inhibitor (such as hydroquinone) and maleic anhydride to function as a... 

Printing plates of type Nyloprint WF-M were provided by BASF, who carried out the optochemical etching. The plates, which were chosen for their high conformity and low tolerances, had screen rulings of 54 and 80 lines per centimetre (Ipc), giving distances between adjacant peaks of 185 pm and 125 pm, respectively, and tonal values of 2, 5, 10, 20 and 50% (Fig. 2). The plates were made of (a) a mixture of poly(vinyl alcohol) and poly(vinyl alcohol-co-poly(ethylene glycol) 60%, (b) a mixture of monoacrylate and diacrylate 38% and (c) a photoinitiator and stabiliser dye 2%. 

Malten KE, van der Meer-Roosen CH, Seutter E (1978) Nyloprint-sensitive patients react to NN -methylene-bis-acrylamide. Contact Dermatitis 4 214... 

Hydroxyethyl methacrylate, 1% pet Hexanediol diacrylate, 1% pet Nyloprint WD printing plates (Pedersen et al. 1983) N,N -methylene-bis-acrylamide, 1% pet (Pedersen et al. 1983)... 

Pedersen NB, Chevallier MA, Senning A (1982) Secondary acrylamides in nyloprint printing plates as a source of contact dermatitis. Contact Dermatitis 8 256-262 Pedersen NB, Senning A, Nielsen AO (1983) Different sensitising acrylic monomers in Napp printing plate. Contact Dermatitis... 

Uses organic intermediate cross-linking agent for preparation of polyacrylamides in preparing poly-acrylamide gel for electrophoresis, chemical grouting and other purposes in NAPP and Nyloprint UV-cured printing plates A... 

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