by Dr. Stephen C. Lapin, PCT Engineered Systems LLC Introduction Low energy electron beam (EB) systems with accelerating potentials up to 300 kV have been used in industrial processes for more than 30 years. Most of the systems feature a self-shielded design, meaning the systems include all shielding needed to prevent emission of secondary X-rays as the substrate is … [Read more...] about Modification of Polymer Substrates Using Electron Beam-Induced Graft Copolymerization
2015 Issue 1
Interaction of Photoexcited Photoinitiators with Nitroxyl Radicals
by Dr. Igor V. Khudyakov, Catawba County, North Carolina Introduction Formulations that undergo photopolymerization have, in most cases, photoinitiators (PIs) such as benzophenone and others. These formulations may have nitroxyl (aminoxyl) radicals, which are added for prevention of degradation of the cured coatings. Nitroxyls also are formed during oxidation of hindered … [Read more...] about Interaction of Photoexcited Photoinitiators with Nitroxyl Radicals
Regulatory News
2015 Reminder: New OSHA Reporting Requirements Beginning January 1, 2015, the Occupational Safety and Health Administration (OSHA) changed what covered employers are required to report. They now are required to report all work-related fatalities within eight hours and all in-patient hospitalizations, amputations and losses of an eye within 24 hours of finding out about the … [Read more...] about Regulatory News
Stereolithography: Three Decades of UV Technology Innovation
by Dr. Kangtai Ren, senior scientist, DSM Functional Materials Abstract: Since the first patent application in the field was officially filled in 19841, stereolithography (SL) has advanced to become a fascinating technological innovation. This technology uses digital data to create complex three-dimensional structures by curing a liquid resin using a UV-laser. The parts … [Read more...] about Stereolithography: Three Decades of UV Technology Innovation
Q&A: UV-Curing Technology
by R.W. Stowe, Heraeus Noblelight America LLC Question: Why Don't Technical Data Sheets Specify a UV-Curing System? Answer: Product data sheets for UV inks, coatings, adhesives and paints provide a good amount of detail on the target physical properties of the product, as these are most important to the end use. Why is there so little information on the process of curing … [Read more...] about Q&A: UV-Curing Technology