6results about How to "Good extrusion processing performance" patented technology

This invention relates to the field of polymer materials technology, and discloses a high-elasticity rubber-plastic insulated cable composite material and its preparation method. The high-elasticity rubber-plastic insulation material comprises, by weight, 40-50 parts of EPDM rubber, 20-25 parts of polyolefin elastomer, 30-35 parts of modified calcined kaolin, 3-5 parts of composite antioxidant, 2-3 parts of silane coupling agent, and 1.5-2 parts of vulcanizing agent. During preparation, EPDM rubber and polyolefin elastomer are kneaded for 5-8 minutes, then modified calcined kaolin and silane coupling agent are added and kneaded for another 8-12 minutes, followed by the addition of composite antioxidant and vulcanizing agent and kneading for 3-5 minutes. Finally, the mixture is vulcanized in stages. The first stage vulcanization temperature is 155-160℃, and the second stage vulcanization temperature is 165-170℃. The insulating material prepared by this invention has excellent elasticity, outstanding resistance to flexural fatigue, stable insulation performance, high volume resistivity, excellent aging resistance, and tight interfacial bonding. It is suitable for use in high-voltage cable insulation layers, effectively extending the service life and stability of the cable.

The utility model belongs to the technical field of cable processing, and particularly relates to a cable insulating layer extruder which comprises a machine body, a machine head used for discharging an insulating layer body is arranged on the machine body, the insulating layer body is provided with a coating section and a diffusion section, two change detection assemblies are arranged on the outer side of the machine head, and the change detection assemblies are connected with the machine head. The change detection assembly comprises a transverse frame, a sliding block and two distance sensors, and one distance sensor is opposite to the wrapping section; when an insulating material is extruded, the two distance sensors can be arranged, along with the proceeding of extrusion work, the distance sensor opposite to the coating section can be used as a reference, the distance sensor opposite to the diffusion section can be compared, if the distance floating change occurs, the equipment can be adjusted in time, and the production efficiency is improved. And meanwhile, according to the change of the position between the diffusion section and the coating section, self-adaptive adjustment can be carried out through the sliding block, and the extrusion processing effect of the insulating layer is improved.

The present application relates to the technical field of cable material, in particular to a kind of high tear-resistant cable material and preparation method.The material takes hydrogenated styrene-butadiene-styrene block copolymer as matrix, contains carboxyl-terminated liquid fluororubber microcapsule and polypyrrole modified layered double hydroxide nanosheet.Through the process of containing dynamic vulcanization, the microcapsule core material is released and interfacial interaction occurs with nanosheet, and dynamic sacrificial network and rigid nanoskeleton interpenetrating structure are constructed in situ in matrix.The material has both ultra-high tear strength (≥78kN / m) and high elongation at break (≥400%), and realizes early mechanical damage electrical warning function using sensitive conductive network formed by polypyrrole on the surface of nanosheet.Meanwhile, the material maintains excellent flame retardancy, insulation, heat resistance and processing performance, and is suitable for cable sheath with high requirements for reliability and intelligentization.

The present invention discloses a polymer melt composite vibration extrusion molding device, including a composite vibration system including a feed die composed of an upper die and a lower die, a feed die parting surface provided with a flow channel that runs through both ends of the feed die and is used for polymer melt to flow; the upper die is provided with at least one first through hole, and the lower die is provided with at least one second through hole; the first through hole and the second through hole are respectively perpendicular to and connected with the flow channel; a medium and low frequency vibration module includes a vibration rod installed in the first through hole and extending into the flow channel, and a driving member drives the vibration rod to perform piston movement in the first through hole; a high frequency ultrasonic module includes an ultrasonic vibration head arranged at one end of a variable amplitude rod; the variable amplitude rod is installed in the second through hole and the ultrasonic vibration head extends into the flow channel. The present invention can significantly improve the processing performance of polymers, and the composite vibration field can also change the microstructure morphology of polymers, thereby improving the mechanical properties and thermal properties of products, etc., and realizing industrialized polymer melt extrusion production and application.

The invention discloses an antistatic master batch, a preparation method thereof and an antistatic sheet, and relates to the technical field of composite materials. The antistatic master batch provided by the invention comprises the following components in parts by weight: 30-40 parts of polystyrene resin; 15 to 30 parts of polysiloxane resin; 40 to 60 parts of modified carbon black; wherein the modified carbon black is acidified and modified carbon black; 5 to 20 parts of a modified carbon nanotube; wherein the modified carbon nano tube is a carbon nano tube modified by a surfactant; and 15-30 parts of a combined dispersant. When the obtained antistatic master batch is used for preparing a polystyrene sheet, the extrusion processing performance of polystyrene resin is improved, the dispersing performance of the carbon black and the carbon nanotubes is relatively good, the generation of particles, insoluble substances and the like of the carbon black and the carbon nanotubes is effectively reduced, and the antistatic performance of the sheet is also relatively good.

Provided is a polyurethane resin composition comprising 20 to 99 parts by mass of a thermoplastic polyurethane elastomer (A) and 1 to 80 parts by mass of multilayered polymer particles (B), the multilayered polymer particles (B) satisfying the following conditions (1) to (6): (1) the multilayered polymer particles (B) comprise two or more layers having at least one rubber component layer (I) inside and at least one thermoplastic resin component layer (II) in an outermost part, (2) the rubber component layer (I) is a polymer layer formed by copolymerizing a monomer mixture (i) comprising 50 to 99.99 mass% of an acrylic acid ester, 49.99 to 0 mass% of an additional monofunctional monomer copolymerizable with the acrylic acid ester, and 0.01 to 10 mass% of a polyfunctional monomer, (3) the thermoplastic resin component layer (II) is a polymer layer formed by polymerizing a monomer (ii) comprising 40 to 100 mass% of a methacrylic acid ester and 60 to 0 mass% of an additional monomer copolymerizable with the methacrylic acid ester, (4) of the thermoplastic resin component layer (II), a polymer of the outermost layer has a number average molecular weight measured by a GPC method of 30,000 or less, (5) the total mass ratio [(I) / (II)] of the rubber component layer (I) to the thermoplastic resin component layer (II) is 30 / 70 to 90 / 10, and (6) the multilayered polymer particles (B) have an average particle size of 150 nm or less; and the melt viscosity ratio ηr of the melt viscosity η(A) of the thermoplastic polyurethane elastomer (A) at a shear rate of 121.6 sec-1 to the melt viscosity η of the polyurethane resin composition at a shear rate of 121.6 sec-1 satisfying the following relationships: melt viscosity ratio ηr (180°C) at 180°C: η(A) / η>1.0, melt viscosity ratio ηr (200°C) at 200°C: η(A) / η<1.0