In a process for building tyres for vehicle wheels, at least one tread band (9) or other elastomeric component of a tyre (2) is made by applying at least one continuous elongated element (14) according to a plurality of turns (C) around a forming drum (15) rotating around a geometric rotation axis (X) thereof. The continuous elongated element (14) is made by the action of extruding a first material through an extrusion nozzle (16), to form an inner core (33) of said continuous elongated element (14) exiting from an outlet opening (18) of the extrusion nozzle (16). During the extrusion, a second material different from the first material is conveyed around the first material, at the extrusion nozzle (16) and upstream of the outlet opening (18), to form a coating layer (32) which entirely surrounds the inner core (33).

The invention relates to a method for producing a tread (20), comprising the steps: extruding the tread (20), which has an outer side (22) and an inner side (24), opposite the outer side (22), and a carrying region (26) made of a carrying region rubber material and a guide strip (28) made of a guide strip rubber material, wherein the guide strip (28) extends from the outside (22) to the inside (24) and a specific electrical guide strip resistance (W.sub.28) of the guide strip rubber material is smaller than a specific electrical carrying region resistance of the carrying region rubber material. The steps according to the invention are: determining an electrical guide strip resistance (W.sub.28) of the guide strip (28) between the outer side (22) and the inner side (24) and outputting a warning signal when the electrical resistance (W) exceeds a specified maximum resistance (W.sub.28,max).

A method for printing a three-dimensional part with an electrophotography-based additive manufacturing system having an electrophotography engine, a transfer medium, and a layer transfusion assembly includes providing a part material to the electrophotography-based additive manufacturing system, the part material compositionally comprising a charge control agent, and a thermoplastic material having a heat deflection temperature greater than about 150° C., and has a powder form. The method includes triboelectrically charging the part material to a Q/M ratio having a negative charge or a positive charge, and a magnitude ranging from about 5 micro-Coulombs/gram to about 50 micro-Coulombs/gram and developing layers of the three-dimensional part from the charged part material with the electrophotography engine. The method includes electrostatically attracting the developed layers from the electrophotography engine to the transfer medium and moving the attracted layers to the layer transfusion assembly with the transfer medium, wherein the layer transfusion assembly comprises a nip roller. The method includes transfusing the moved layers to previously-printed layers of the three-dimensional part with by moving the attracted layers about a nip of a nip roller using heat and pressure over time.

An enclosure and a method of making the enclosure is provided that includes mixing stainless steel, rubber, and polycarbonate to produce a material mixture that is electrically conductive. Carbon black powder and polyethylene are blended to produce an electrically resistive additive for dissipating static electricity. At least one injection mold for the enclosure is positioned in fluid communication with an exit end of a heating barrel. The weatherproof material mixture is injected into an entry end of the heating barrel to produce a melted weatherproof material mixture. The electrically resistive additive is introduced through a lateral port of the heating barrel proximate to the exit end to partially mix with the melted weatherproof material mixture to produce an injection mixture. The injection mixture into the at least one injection mold to produce the enclosure that is weatherproof, electrically conductive, and electrically resistive.

An enclosure and a method of making the enclosure is provided that includes mixing stainless steel, rubber, and polycarbonate to produce a material mixture that is electrically conductive. Carbon black powder and polyethylene are blended to produce an electrically resistive additive for dissipating static electricity. At least one injection mold for the enclosure is positioned in fluid communication with an exit end of a heating barrel. The weatherproof material mixture is injected into an entry end of the heating barrel to produce a melted weatherproof material mixture. The electrically resistive additive is introduced through a lateral port of the heating barrel proximate to the exit end to partially mix with the melted weatherproof material mixture to produce an injection mixture. The injection mixture into the at least one injection mold to produce the enclosure that is weatherproof, electrically conductive, and electrically resistive.

Disclosed is a method for preparation and activation of a super hydrophobic electret nanofibrous filter material for cleaning PM2.5, comprising the steps as follows: (1) dissolving polymer powders and resin into a corresponding solvent so as to prepare a polymer solution, then stirring on a magnetic stirrer and standing for use; (2) in order to reinforce the electrostatic effect of the fiber, before preparing the polymer solution, adding in organic electret nanoparticles into the solvent, then oscillating with an ultrasonic oscillator; (3) in order to reinforce the super hydrophobic effect of the filter, spraying a low surface energy solution on the prepared nanofiber with a designed nozzle to carry out modification.

A member which contacts liquid, gas, or powder insulating material when the insulating material is caused to flow and which is less susceptible to dielectric breakdown; a distribution mechanism, tank, and device using a sheet for lining the member or the inside of a pipe or a tank containing the member; a storage tank in which a portion of the surface of a liquid-contact portion thereof includes the member a storage method for storing organic solvent, ultrapure water, and hydrogen peroxide water, using the storage tanks; and a method for manufacturing a semiconductor product using the organic solvent stored in the storage tank. A resin composition containing a matrix resin and an electro-conductive material dispersed in the matrix resin is used for the member which contacts liquid, gas, or powder insulating material when the insulating material is caused to flow.

Provided is an electrically conductive resin composition with which the characteristics inherent in a thermoplastic resin are easily retained and which exhibits more excellent electrical conductivity even if the blending amount of an electrically conductive filler is small. This electrically conductive resin composition contains a thermoplastic resin, such as a polycarbonate or a polyolefin, and an electrically conductive filler, such as a carbon nanotube. This electrically conductive resin composition further contains a dye, such as a perinone-based dye or a disazo-based dye, which is a component for improving electrical conductivity, and this electrically conductive resin composition can be obtained by kneading or molding a raw material mixture containing a thermoplastic resin, an electrically conductive filler, and a dye under a condition of a temperature equal to or higher than the melting point of the thermoplastic resin.

The application relates to a plastic moulding for a moulding arrangement including a housing for another plastic moulding of the moulding arrangement, wherein the housing is formed within a moulding body of the plastic moulding including a weldable material in at least some areas. It is contemplated therein that a contact element is arranged on the moulding body, the contact element at least partly including an electrically conductive material and limiting a recess of the moulding body adjoining the housing in at least some areas. The application further relates to a moulding arrangement and a method for producing a moulding arrangement.

A resin composition includes 5 to 82 parts by weight of an aromatic polyester, 0 to 50 parts by weight of an aromatic polycarbonate, 10 to 90 parts by weight of a highly heat-resistant aromatic polycarbonate, 0 to 10 parts by weight of a graft-copolymer, 0 to 10 parts by weight of an ethylene copolymer, 2.5 to 50 parts by weight of a silicate filler, 0 to 10 parts by weight of an electric conductive filler, and 0 to 2 parts by weight of a phosphorus compound wherein the total amount of the components are 100 parts by weight. The total amount of the graft-copolymer and the ethylene copolymer is from 0.5 to 10 parts by weight, the silicate filler is at least one compound selected from mica and kaolin, and the resin composition has a deflection temperature under load of 130 C. or higher.