DuPont’s new Cyrel Lightning flexo plate optimized for LED exposure

Figure 5: Abiding Bank Exposure vs. Scanning LED Exposure Source: DuPont internal analysis. Illustration – DuPont's technical white paper on 'Understanding and optimizing photopolymer plates for UV LED exposure'

DuPont'southward new Cyrel Lightning photopolymer plate is optimized for LED UV exposure and tin save upwardly to 42% higher productivity in the flexographic platemaking process. LED lamps are increasingly used for curing inks in printing and for the UV exposure of flexographic plates instead of the conventional florescent tube systems known every bit 'banking concern exposure.' While LED exposure tin bring many benefits to the flexographic platemaking, for not-optimized photopolymers, using this unique exposure process tin require compromises in productivity and quality. However, the new Cyrel Lightning made for LED UV exposure plates deliver higher productivity, improved plate quality and superior impress quality.

While one can reach very short exposure times using the maximum UV output (since LED emit UV radiation at a very high intensity that is 15 to xx times college than florescent banks and have a narrower emission spectrum), tradeoffs in quality may occur especially when using flexo photopolymer plates that have been designed for the banking company exposure.

DuPont's technical white paper on 'Understanding and optimizing photopolymer plates for UV LED exposure' says, "Often, the combination of high output and curt exposure time leads to larger minimum dots, pronounced shoulders of printing elements and cupping, which all tin can contribute to less breadth on press and lower impress quality. This claiming often requires LED exposure times to exist longer in society to prevent the quality issues mentioned higher up."

The challenge in flexo terms is to reach a well-baked surface, but likewise a sufficient curing of the centre of the photopolymer material in, forming fine elements and surface structures while photopolymerizing the bulk of the cloth sufficiently for stable shoulders and acceptable through-cure.

DuPont Technical White Paper for understanding and optimizing plates for LED UV exposure

The Solution

If photopolymer formulations were optimized for LED exposure from the start, there would be less of a need to compromise betwixt productivity and quality. Optimized flexo plates along with experienced application support staff yield the all-time results. With chemical science, the photopolymer plate tin be redesigned for LED exposure.

DuPont has rethought plate formulation, specifically for UV LED exposure for the new Cyrel Lightning series of photopolymers plates. The plate series uses chemistries with tailored UV profile to reach a balance between surface and through cures. The innovation enables fast surface cure that effectively mitigates oxygen inhibition between passes of LED exposure when the plate is in the dark. At the same time, information technology provides sufficient through-cure through a finely tuned UV absorption contour.

This leads to an exposure time reduction of up to 42% in the corresponding platemaking processes and improved quality especially in isolated highlight dots and superior print quality amid LED-exposed plates.

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Source: https://packagingsouthasia.com/consumables/polymers/duponts-new-cyrel/

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