Particle Filled Polyethylene Composites Used in the Technology of Rotational Moulding The submitted article discusses rotational moulding technology and filled plastics. For testing, linear low density polyethylene filled with talc was used. The materials tested varied way of mixing the filler into the polymer. For the prepared samples were evaluated by tensile, elongation, melt flow index, density, Shore hardness and Vicat softening temperature. Experiments showed that, in principle, it is possible to produce rotational moulding technology filled thermoplastics.

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The present study has been undertaken to compare the microstructure of the plain carbon steel, containing 0.65 carbon, which was formed during varying isothermal and continuous cooling conditions following austenitisation at the same temperature and soaking time. After austenitisation, one set of samples was subjected to isothermal treatment which was carried out at a temperature varying in the range of 650–400 °C, and the other one was continuously cooled to ambient temperature using different cooling rates ranging from 500 to 1.4 °Cs–1. The metallographic examination of the samples was fulfilled using light and TEM microscopy. Additionally, Vickers hardness measurements were performed.

Contribution deals with an influence of dies geometry on processing of steel wires in a ropery. Experiments were carried out at the drawing and bunching of wires with diameter 0.30 mm and tensile strength approximately 2 900 ÷ 3 000 N.mm -2 . The wires were being drawn on dies with drawing angle size 2 = 11° and 2 = 13° from two producers. The drawn wires were being bunched on double twisted machines. The count of wire fractures were mathematically and statistically evaluated. It was also monitored total quantity of material which was processed during this experiment. A positive influence of restriction of drawing die angle from 13° to 11° at the bunching process was found. Mainly count of wire fractures and mass of wires scrap were significant decreased at the bunching of steelcords