Knowledge base

IntroductionWhen the title of this paper was first accepted forpresentation atthis Conference, it was stressed by the organisers that new "hard"information was required and not a review of that which "we alreadyseem to know". The interesting word here is "seem", which itselfimplies some doubt as to the extent and accuracy of existing knowledgeof th

IntroductionTextiles'may need to be coated for a number of reasons, such as ensuringwatertightness or windtightness (1]. Sometimes, it is necessary to improvechemical and wear resistanthe or to enhance'the decorative qualities ofcloth. Textiles are also used in applications where the coating is primarilyresponsible for the functional properties of

INTRODUCTIONWithin the radiation curing industry,' photopolymerization of organic coatings induced by cationicinitiation has acquired real commeicial interest and stimulated many investigations in variousapplication fields. This is particularly due to the distinct of cationic UV-curing over theother techniques of radiation curing.As a consequenceof

IntroductionRadiation curable resins often consist of oligomer and/ortheir mixtures with monomer having acrylic double bond.1Investigations and developments for functional oligomers andmonomers having such properties as low viscosity, highreactivity, low toxicity, and low irritation, were important.In our previous paper, it was reported that a liqu

IntroductionEnvironmental and safety problems (solvent emission,energy consumption, flammability) associated withsolvent based pressure sensitive adhesives (PSA) haveintensified the, development of and conversion toalternative technologies in the last ten years e.g.emulsion and holtmelt PSA.These systems do not always offer all the properties ofthe

IntroductionRadiation curing is of particular interest in the packagingindustry because this industry is noted for its rapid growth intechnological adcances. It started in 1969 when the first commercialrun of UV—curing inks and varnishes were tested on afolding carton line in the United States[1].Since then only a couple of reports on UV-flexo inks

IntroductionOver the last few years, the surface caotings industry has seana rapid increase in the use of radiation curing. [1] The mostcommonly used materials in conjunction with radiation curing areacrylates. These materials are polymerised by afree radicalchain process which in uv. curing is triggered by the use of aphotoinitiator and in the cas

IntroductionThe application of radiation curing has, until now, been son ewhat restricted by limitationsinherent in the chemistry of free-radically initiated acrylates. As a result the penetration ofthe coating industry by radiation curing lags behind that achieved by the other so-called "new"coating technologies. The cationically initiated epoxide