Radiation cured material

Then there is the impact on raw materials costs of higher oil prices. In the long term, costs such as energy and cooling need to be assessed. The use of radiation-curing materials also has consequences for the layout within plants of machines with coating facilities. 

Radiation-curing materials differ hugely in the way in which they react Therefore, distinctions are made between ... 

One of the recent trends in radiation-curing materials is the development of new resin systems that provide high levels of performance in new market applications. New UV-curable resin systems are being applied for food packaging, a market that was previously closed to UV. The resin market is also expected to witness more flexible press systems entering the market, providing the flexibility to perform smaller print jobs in a more cost-competitive manner. 

Hoyle, C. E. and J. F. Kinstle (eds.), Radiation Curing of Polymeric Materials , ACS, Washington, DC, 1990. Sections cover photoinitiators, photocurable systems, properties of radiation-cured materials, photodegradation, laser-initiated polymerization and high energy radiation curing. 

Earlier material systems were screened epoxies, but both laminatable dry-film and Hquid uv photoimageable coatings are finding wide acceptance. These radiation-cured coatings offer high resolution and registration accuracy, and can be either epoxies or epoxy acrylates. 

Radiation curing of epoxies with cationic initiators is well known [20—28]. UV-visible light has been the predominant radiation source the process has been limited to thin coatings due to the low penetration of the visible-UV light [22,23], Thermal and mechanical properties of these materials are low and the curing is incomplete. Several studies have shown that commercially available epoxies with various cationic initiators can be polymerized with EB curing [20,29-34]. 

This technique is used for the production of radiation-cured coatings, adhesives, and inks. The process is not accompanied by the release of heat, which is particularly important in the case of heat-sensitive materials, e.g., wood, cardboard, paper, plastics, etc. Various radiation sources are used for this technique, among which UV and EB are most useful. 

Another way of modifying unsaturated PHAs in the bulk is by crosslinking of the material. This has been accomplished by either chemical reaction with sulfur or peroxides [109, 110], or by radiation curing [91, 111]. In all cases, crosslinking altered the ultimate material properties drastically, yielding a true rubbery material. The advantages of applying rubbers from crosslinked PHAs over the use of current rubbers will be elaborated in Sect. 4.5. 

Radiation Curing of Polymeric Materials, Hoyle C.E, Kinstle J.F. (Eds), ACS Symp.Series 417, ACS Washington DC, 1990. 

Vacuum UV (VUV) is strongly absorbed by quartz, which is used as the envelope material for bulbs. Because of that and because of its small penetration depth, VUV is not suitable for usual radiation curing. 

Screen printing of UV inks is being done over paper, metal, films, foils, plastics, and PVC. Radiation curable materials are being used as vehicles for ceramic inks that are screened onto automotive windshields, cured, and then fired in an oven to bum off the organic binder and fuse the ceramic into the glass windshield. ... 

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