Abstract: A modular block with four walls, a top face and two internal cavities, where both the locking and the centralization between the blocks are prominently made by male and female wedge-like couplings.

Abstract: This invention refers to a medium voltage electric cable (up to about 45 kV) comprising one or more cores, each of said cores being constituted by a conductor covered with an inner semiconductive screen, an insulation layer of extruded polymeric material (preferably, cross-linked polyethylene or ethylenepropylene rubber) and an outer semiconductive screen.The outer semiconductive screen, which is extruded on the insulation and vulcanized at the same time as the insulation in a continuous vulcanizing line, is constituted by a mixture based on a blend of nitrile rubber and ethylene-propylene rubber and containing carbon black, cross-linking agents and various additives.The blend of nitrile rubber and ethylene-propylene rubber comprises 50-70 parts by weight of nitrile rubber and 50-30 parts by weight of ethylene-propylene rubber.The so constituted outer semiconductive screen has good adhesion to the insulation and can be easily removed from said insulation.

Abstract: This invention relates to a process for making textiles containing cellulose crease-resistant.The process of the invention involves contacting the textile with an aqueous treatment bath to which alkali chlorides or bromides of sodium and potassium have been added and which contains 1,3-dimethylol-4,5-dihydroxyethylene urea, the hydroxyl and methylol groups of which can optionally be partially or completely etherified with low, monohydric aliphatic alcohols with 1 to 3 carbon atoms and potential acid catalysts. It is possible for the treatment bath to contain in addition other precondensates normally used in the treatment of textiles provided at least 40% by weight based on the weight of the sum of the N-methylol derivatives calculated as anhydrous substances is the optionally etherified 1,3-dimethylol-4,5-dihydroxyethylene urea.