Influence of false-twist texturing parameters on the structural properties of polyester yarn

37-41Structural changes of polyester yarn with false-twist draw texturing parameters have been studied using a high-temperature heater, high texturing speeds, short residence time in the heater and a short yarn path. The dependence of three structural parameters, viz. crystalline orientation, crystal size and birefringence, on texturing temperature, yarn residence time in the heater and draw ratio has also been studied. At high texturing speeds, the crystalline orientation and crystal size decrease due to low thermal input. Crystalline orientation tends to increase at high texturing temperatures and draw ratios

Application of flame retardant products to knitted fabric

330-334The effect of durable flame retardant products on knitted fabric flammability has been studied. Firstly, the non-durable, semi-durable and durable flame retardants were applied to the bleached knitted cotton fabrics to observe their effects on fabric flammability and then phosphorus-based durable flame retardant products were applied to bleached fabrics at different concentrations, curing temperatures and curing times alternatively to evaluate the effect of their treatment parameters on fabric burning behaviour. The burning behaviour and weight loss values of all the fabrics were evaluated using the standard vertical flammability test method. The results evaluated using an SPSS statistical program show that the flame retardant concentration, curing temperature and curing time are very important parameters to obtain FR fabrics having good flame resistance and acceptable handle and appearance

Impact structures and events - a Nordic perspective

Abstract in UndeterminedImpact cratering is one of the fundamental processes in the formation of the Earth and our planetary system, as reflected, for example in the surfaces of Mars and the Moon. The Earth has been covered by a comparable number of impact scars, but due to active geological processes, weathering, sea floor spreading etc, the number of preserved and recognized impact craters on the Earth are limited. The study of impact structures is consequently of great importance in our understanding of the formation of the Earth and the planets, and one way we directly, on the Earth, can study planetary geology.The Nordic-Baltic area have about thirty confirmed impact structures which makes it one of the most densely crater populated terrains on Earth. The high density of identified craters is due to the level of research activity, coupled with a deterministic view of what we look for. In spite of these results, many Nordic structures are poorly understood due to the lack of 3D-geophysical interpretations, isotopeor other dating efforts and better knowledge of the amount of erosion and subsequent tectonic modifications.The Nordic and Baltic impact community is closely collaborating in several impact-related projects and the many researchers (about forty) and PhD students (some seventeen) promise that this level will continue for many more years. The main topics of research include geological, geophysical, and geochemical studies in combination with modeling and impact experiments. Moreover, the Nordic and Baltic crust contains some hundred suspect structures which call for detailed analysis to define their origin.New advanced methods of analyzing geophysical information in combination with detailed geochemical analyses and numerical modeling will be the future basic occupation of the impact scientists of the region. The unique Cretaceous/Tertiary boundary (K-T) occurrences in Denmark form an important source of information in explaining one of the major mass extinctions on Earth