Abstract: Process for treatment of an initial polyethylene-containing material to produce a polyethylene composition comprising providing a twin-screw extruder with thermal regulation devices; providing an initial polyethylene-containing material comprising at least 50 wt. % of polyethylene based on the total weight of the initial polyethylene-containing material; extruding the initial polyethylene-containing material to obtain a polyethylene composition; wherein extrusion is performed with a residence time of less than 20 min; and recovering a polyethylene composition; wherein extruding comprises a thermal treatment of the initial polyethylene-containing material at a temperature of at least 300° C. in one or more hot zones of the extruder by self-heating to have a maximum barrel temperature ranging from 300 to 460° C. in at least one hot zone of the extruder.

Abstract: Process of grafting of a polyethylene-containing material to produce a modified polyethylene composition comprising providing a twin screw extruder with one or more thermal regulation devices; a polyethylene-containing material and a grafting agent and extruding the polyethylene-containing material and the grafting agent to obtain a modified polyethylene composition; the step of extruding comprises a thermal treatment of the polyethylene-containing material by self-heating of the material at a maximum barrel temperature Ts ranging from 315° C. to 410° C. in one or more hot zones of the extruder.

Abstract: Process of grafting of a polyethylene-containing material to produce a modified polyethylene composition comprising providing a twin screw extruder with one or more thermal regulation devices; a polyethylene-containing material and a grafting agent and extruding the polyethylene-containing material and the grafting agent to obtain a modified polyethylene composition; the step of extruding comprises a thermal treatment of the polyethylene-containing material by self-heating of the material at a maximum barrel temperature Ts ranging from 315° C. to 410° C. in one or more hot zones of the extruder.

Abstract: Polyethylene composition comprising at least 50 wt. % of polyethylene based on the total weight of the polyethylene composition, and having a density of at least 0.910 g/cm3; a melt index MI2 ranging from 3.0 to 60.0 g/10 min; an unsaturation index higher than 2,000 wherein the unsaturation index is the product of the Mn in Dalton and the vinyl unsaturation units per 1,000 carbon atoms as determined by ASTM D6248-98:2004; a complex viscosity at 0.1 rad/sec at 190° C. ranging from 200 to 20,000 Pa·s; and a ratio of complex viscosity at a frequency of 0.01 rad/sec to the complex viscosity at a frequency of 100 rad/sec of at most 8.0, said ratio being measured at 190° C.

Abstract: Polyethylene composition comprising at least 50 wt. % of polyethylene based on the total weight of the polyethylene composition, and having a density of at least 0.910 g/cm3; a melt index MI2 ranging from 3.0 to 60.0 g/10 min; an unsaturation index higher than 2,000 wherein the unsaturation index is the product of the Mn in Dalton and the vinyl unsaturation units per 1,000 carbon atoms as determined by ASTM D6248-98:2004; a complex viscosity at 0.1 rad/sec at 190° C. ranging from 200 to 20,000 Pa·s; and a ratio of complex viscosity at a frequency of 0.01 rad/sec to the complex viscosity at a frequency of 100 rad/sec of at most 8.0, said ratio being measured at 190° C.

Abstract: The disclosure provides for a composite material suitable for use as EMI shielding material, remarkable in that it comprises a component A being a polymer resin being at least one amorphous polymer resin and/or at least one semi-crystalline polymer resin selected from polyethylene resin and/or polypropylene resin; from 15.0 to 60.0 wt. % of component B being at least one metal-coated particle based on the total weight of the composite material; and from 0.5 to 5.0 wt. % of component C being one or more dispersants based on the total weight of the composite material; wherein one or more dispersants are selected from fatty acids, fatty acid derivatives, ethylene bis stearamide, functionalized waxes, maleic anhydride-grafted polymers and any mixture thereof; wherein the blend of components A, B and C shows a density ranging from 0.8 to 2.0 g/cc.

Abstract: The disclosure provides for a composite material suitable for use as EMI shielding material, remarkable in that it comprises a component A being a polymer resin being at least one amorphous polymer resin and/or at least one semi-crystalline polymer resin selected from polyethylene resin and/or polypropylene resin; from 15.0 to 60.0 wt. % of component B being at least one metal-coated particle based on the total weight of the composite material; and from 0.5 to 5.0 wt. % of component C being one or more dispersants based on the total weight of the composite material; wherein one or more dispersants are selected from fatty acids, fatty acid derivatives, ethylene bis stearamide, functionalized waxes, maleic anhydride-grafted polymers and any mixture thereof; wherein the blend of components A, B and C shows a density ranging from 0.8 to 2.0 g/cc.

Abstract: A binder for an injection moulding composition, the binder includes, in percentage by mass and for a total of 100%: 35% to 60% of a component (a), or polymer base, made of a polymer or a mixture of polymers, each of the polymer being non-amphiphilic and having a mass average molar mass greater than or equal to 5,000 g/mol, 30% to 55% of a component (b), or wax, made of a polymer or a mixture of polymers, each of the polymer being non-amphiphilic and having a mass average molar mass less than 5,000 g/mol, and less than 10% of an amphiphilic component (c), or surfactant, and less than 10% of other components (d). The polymer base comprising 2% to 15% of a styrene-ethylene-butylene-styrene copolymer (SEBS), in percentage by mass based on the mass of the binder.

Abstract: A granulation method that can be used to obtain a polymer from “post-consumer” materials, and a motor vehicle part made from polymers produced by recycling used polymers.

Abstract: The invention relates to an electrical device (1,20,30) comprising a cross-linked layer (3, 4, 5, 21, 22, 23, 31, 32) produced from a polymer composition comprising: at least one polymer A comprising at least one epoxy function; and a cross-linking agent B comprising at least one reactive function that can react with the epoxy function of said polymer A in order to allow the cross-linking of said polymer A. The device is characterised in that the polymer composition also comprises a compound C comprising: at least one aromatic group; and a reactive group that can physically interact with the hydroxyl function formed by the opening of said epoxy function during the cross-linking of polymer A.

Abstract: A granulation method that can be used to obtain a polymer from “post-consumer” materials, and a motor vehicle part made from polymers produced by recycling used polymers.

Abstract: A method of treating a material derived from recovery and shredding, the material comprising a mixture of polypropylene and polyethylene, wherein the material is mixed with 1% to 5% by weight of copolymer of ethylene-?-olefin type.

Abstract: The invention concerns a micro-composite polymer/polymer material comprising an amorphous polymer (I) forming a dispersed phase localised inside a thermoplastic or elastomeric polymer (II) forming a matrix, the glass transition temperature of polymer (I) forming a dispersed phase being higher by at least 20° C. than the melting or softening point of matrix-forming polymer (II), and the amorphous polymer content (I) forming the dispersed phase being not less than 40 wt. %.

Abstract: The invention concerns a micro-composite polymer/polymer material comprising 25 to 35 wt. % of a semicrystalline polymer (I), forming a dispersed phase localised inside a thermoplastic or elastomeric polymer (II) forming a matrix, the temperature of crystallisation of the polymer forming a dispersed phase being higher by at least 20° C. than the melting or softening point of polymer (II) forming the matrix, and the dispersed phase of said material having specifically a morphology such that it induces crosslinking of the continuous phase.