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additives | Laser marking and welding Right:


Undercap laser marking of linerless beverage


closures is gaining in popularity


technology. This is an area that laser technology suppliers are working hard to improve, he says.


The introduction of Ytterbium fibre


lasers - nanosecond, picosecond and femtosecond types - in conjunction with improved laser additives is enabling better beam quality and higher contrast and finer detail marking on plastics. Sabreen says this is due in part to the pulse width and average power available. However, chemistry also plays a part. “Additives


improve the degree of contrast in laser marking,” Sabreen says. “This can be further intensified by changing the laser set-up parameters. Polymers possess inherent characteristics to yield dark or light-coloured marking contrast. Some colorant compounds containing low amounts of titanium dioxide and carbon black may also absorb laser light and, in some instances, improve the marking contrast. Every polymer - even within the same polymeric group - can produce different results.” Compared to ink printing processes, laser additives


PHOTO: THE SABREEN GROUP


can provide a cost-saving. A fully optimised laser additive system can also offer faster marking perfor- mance – Sabreen estimates at least a 15% improve- ment in marking speed compared with a non-optimised formulation. Laser additives are supplied in pellet and powder


forms and most are easily dispersed in polymers, according to Sabreen. Depending on the additive and polymer combination, loading levels by weight are typically in the range of 0.01 to 4.0%. Both pellet and powder forms can be blended into pre-compounded colour material or colour concentrate.


Single Serve Beverage Capsules – Global Market Overview • August 2016


A brand new report by AMI Consulting to assist industry participants in facilitating change, formulating response strategies, directing R&D investment, and proactively managing market threats.


The report: l Analyses global market opportunity and maps out the complex supply chain structure


l Quantifies current and future demand for capsules in million units, metric tonnes, and market value.


l Segments the market by moulding technology, moulding material, products filled and type of system (proprietary vs. compatible)


To find out more, please contact Martyna Fong mf@amiplastics.com or +44 (0)117 924 9442


CLICK HERE FOR MORE DETAILS


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