摘要:
A process for producing a rubber powder from a vulcanized rubber material by the steps of: a) feeding a grinding device with the vulcanized rubber material; b) contacting the vulcanized rubber material with at least one liquid coolant; c) introducing at least one grinding aid additive into the grinding device; d) operating the grinding device so as to grind the vulcanized rubber material to form a rubber powder, and e) discharging the rubber powder from the extruder.
摘要:
A process for producing a rubber powder from a vulcanized rubber material by the steps of: a) feeding a grinding device with the vulcanized rubber material; b) contacting the vulcanized rubber material with at least one liquid coolant; c) introducing at least one grinding aid additive into the grinding device; d) operating the grinding device so as to grind the vulcanized rubber material to form a rubber powder, and e) discharging the rubber powder from the extruder.
摘要:
A thermoplastic material has a) from 5% weight to 95% by weight, preferably from 10% by weight to 60% by weight, of vulcanized rubber in a subdivided form; b) from 5% by weight to 95% by weight, preferably from 40% by weight to 90% by weight, of at least one heterophase copolymer having a thermoplastic phase made from a propylene homopolymer or copolymer and an elastomeric phase made from a copolymer of ethylene with an α-olefin, preferably with propylene; c) from 0% by weight to 90% by weight, preferably from 0% by weight to 50% by weight, of at least one α-olefin homopolymer or copolymer different from b); the amounts of a), b) and c) being expressed with respect to the total weight of a)+b)+c). The thermoplastic material shows improved mechanical properties, in particular, improved elongation at break.
摘要:
A thermoplastic material has a) from 5% weight to 95% by weight, preferably from 10% by weight to 60% by weight, of vulcanized rubber in a subdivided form; b) from 5% by weight to 95% by weight, preferably from 40% by weight to 90% by weight, of at least one heterophase copolymer having a thermoplastic phase made from a propylene homopolymer or copolymer and an elastomeric phase made from a copolymer of ethylene with an α-olefin, preferably with propylene; c) from 0% by weight to 90% by weight, preferably from 0% by weight to 50% by weight, of at least one α-olefin homopolymer or copolymer different from b); the amounts of a), b) and c) being expressed with respect to the total weight of a)+b)+c). The thermoplastic material shows improved mechanical properties, in particular, improved elongation at break.
摘要:
A sun tracker device includes a base frame provided with a track that is at least in part circular; a support structure, of at least one photoreceiver module, the support structure being slidably associated with the track and including a reference plane for the coupling to the at least one photoreceiver module; a first motor group for controlling the movement of the support structure on the track around a substantially vertical axis; and at least one movement member of the at least one photoreceiver module around a respective substantially horizontal axis. The reference plane is tilted, with respect to a support plane of the device, by an angle of predetermined amplitude. An optimal compromise is achieved between maximisation of the energy yield and minimisation of the device size, at the same time ensuring an easy access to the components of the device for the maintenance operations.
摘要:
Cable including at least one core comprising at least one transmissive element and at least one coating layer made of a coating material, wherein said coating material comprises: —at least one polyethylene; —at least one non-ionic surfactant having the following general formula (I): wherein: —Q is a p-functional group; —R is a linear or branched C1-C4 alkyl group, preferably a methyl group; —R1 is a hydrogen atom or a linear or branched C1-C6 alkyl group, preferably a hydrogen atom; —n is an integer from 2 to 5 inclusive, preferably 2; —x is an integer from 5 to 500 inclusive, preferably from 10 to 300 inclusive; —y is an integer from 0 to 500 inclusive, preferably from 10 to 300 inclusive; —z is an integer from 0 to 500 inclusive, preferably from 10 to 300 inclusive; —y+z is not lower than 2; —p is an integer from 1 to 4 inclusive, preferably 1 or 4; provided that, when the transmissive element is an electrical energy transmissive element, said at least one coating layer is an external sheathing layer. Preferably, said coating layer is an external sheathing layer having a protective function.
摘要:
Cable including at least one core comprising at least one transmissive element and at least one coating layer made of a coating material, wherein said coating material comprises: —at least one polyethylene; —at least one non-ionic surfactant having the following general formula (I): wherein: —Q is a p-functional group; —R is a linear or branched C1-C4 alkyl group, preferably a methyl group; —R1 is a hydrogen atom or a linear or branched C1-C6 alkyl group, preferably a hydrogen atom; —n is an integer from 2 to 5 inclusive, preferably 2; —x is an integer from 5 to 500 inclusive, preferably from 10 to 300 inclusive; —y is an integer from 0 to 500 inclusive, preferably from 10 to 300 inclusive; —z is an integer from 0 to 500 inclusive, preferably from 10 to 300 inclusive; —y+z is not lower than 2; —p is an integer from 1 to 4 inclusive, preferably 1 or 4; provided that, when the transmissive element is an electrical energy transmissive element, said at least one coating layer is an external sheathing layer. Preferably, said coating layer is an external sheathing layer having a protective function.
摘要:
A tire for vehicle wheels, includes at least one structural element obtained by crosslinking a crosslinkable elastomeric composition including at least one vulcanized rubber in a subdivided form surface treated with at least one oxidizing agent; at least one diene elastomeric polymer, and at least one sulfur-based vulcanizing agent. A surface treatment process of vulcanized rubber and crosslinkable elastomeric composition is obtained with the vulcanized rubber in a subdivided form surface treated with at least one oxidizing agent.
摘要:
Cable comprising at least one conductor and at least a fire resistant coating layer including a composition comprising: (a) at least an organic polymer having a combustion temperature range comprised between a minimum value T1 and a maximum value T2; (b) at least a glass frit; (c) at least an inert compound; wherein:—said inert compound (c) has a softening point or a melting temperature of not less than 1000° C.;—said glass frit (b) reaches a viscosity of between 107 poise and 108 poise in a selected temperature range including the combustion temperature range of said organic polymer (a), said selected temperature range being such that said glass frit (b) flows over said inert compound (c) and the burned organic polymer (a) so as to form a solid char fire resistant coating layer.
摘要:
A thermoplastic elastomeric material includes a vulcanized rubber in a subdivided form surface-grafted with at least one vinyl polymer, wherein the amount of the surface-grafted vinyl polymer is not lower than 60% by weight, preferably not lower than 70% by weight, more preferably not lower than 80% by weight, with respect to the total weight of the surface-grafted vinyl polymer and the vulcanized rubber in a subdivided form.