8results about How to "Lower surface resistivity" patented technology

The invention discloses a special conductive PVC (polyvinyl chloride) resin and a preparation method thereof, and the method comprises the following steps: adding vinyl chloride monomer, deionized water, a composite initiator, a composite emulsifier and a PH value regulator into a polymerization kettle in a uniform dispersion manner after high-rotating-speed mechanical shearing, and heating with hot water to start polymerization reaction at the polymerization temperature of 49 + / -0.2 DEG C to obtain polyvinyl chloride latex; adding a viscosity reducer and a defoaming agent into the polymerization kettle; the obtained latex enters a discharging groove after being recycled, a conductive additive is added into the discharging groove, and the latex is evenly stirred in the discharging groove; dehydrating by a spray type drying tower, and physically crushing by a hammer type grinding machine to obtain the finished product polyvinyl chloride resin. The surface resistivity of the prepared conductive PVC special resin is below 107 ohms. Compared with the prior art, the conductive additive is added in the polymerization production process, so that the distribution of the conductive additive is more uniform, the construction of a conductive network is firmer, and the surface resistivity of the resin is easier to reduce.

The invention discloses a high-flame-retardant EVA (Ethylene Vinyl Acetate) foaming material and a preparation method thereof, and relates to the technical field of high polymer materials. The high-flame-retardant EVA foaming material is prepared from a coated functional filler, a nitrogen-doped graphene-like carbon / cobalt nano composite material, EVA, stearic acid, zinc stearate, zinc oxide, a foaming agent AC and dicumyl peroxide, a core-shell combined filler composed of a coated functional filler and a nitrogen-doped graphene-like carbon / cobalt nano composite material is uniformly distributed in an EVA three-dimensional network cross-linked matrix to form a porous material with a uniform closed cell structure, so that the flame retardant property is improved by virtue of a physical barrier effect and a catalytic carbon formation mechanism, and an efficient and stable conductive network is also constructed; the antistatic performance is optimized, and the application range of the EVA foaming material is widened.

The utility model belongs to the technical field of printing paper, and particularly relates to anti-adhesion printing paper for digital printing, which comprises a basic paper layer, a water absorption auxiliary layer arranged at the top of the basic paper layer, an antistatic layer arranged inside the basic paper layer, and an anti-adhesion functional layer arranged at the top of the water absorption auxiliary layer. The bottom of the base paper layer is provided with the blocking layer, the edge of the base paper layer is provided with a tearing line and a positioning hole, the interior of the water absorption auxiliary layer is communicated with a pore structure so that water in digital printing ink can be rapidly absorbed, ink fixation can be accelerated, and the adhesion risk caused by water residue can be reduced; the anti-adhesion functional layer forms a continuous film layer, stable adhesion of anti-adhesion particles is ensured, the blocking layer prevents ink on the front side from permeating to the back side, the blocking layer is matched with the anti-adhesion functional layer on the front side to achieve the double-sided anti-adhesion effect, meanwhile, when the paper is torn, the paper is broken along a hole line, and the edge is neat and free of burrs; and accurate alignment during paper conveying is ensured.

This invention relates to the field of polymer materials technology and discloses an antistatic PC / ABS composite material and its preparation method. The PC / ABS composite material of this invention comprises the following raw materials in parts by weight: 45-65 parts PC resin, 15-25 parts ABS resin, 5-10 parts composite macromolecular antistatic agent, 4-8 parts toughening agent, 1-3 parts antioxidant, 0.5-1.5 parts lubricant, 3-7 parts inorganic filler, and 1-2 parts coupling agent. The composite macromolecular antistatic agent added to this composite material differs from the addition of traditional small-molecule antistatic agents and conductive fillers, possessing a permanent antistatic effect, good compatibility, and minimal impact on mechanical properties.

A display device is provided, comprising a cover layer and an adhesive layer disposed on the cover layer. The adhesive layer has a size of less than 5 × 10⁻⁶. 13 Surface resistivity of Ω / square and less than 4×10 10 The volume resistivity is Ω-meter, and the adhesive layer is essentially free of any non-polymer ionic compounds. Advantageously, the adhesive layer reduces electrostatic charge buildup on the cover layer while also reducing electronic bright spots along the edges of the display device or near the aperture features of the display device.

This invention relates to a high-impact polyethylene composite modified plastic and its preparation method, belonging to the field of polyethylene plastics technology. The invention involves creating a self-made modifier and using this modifier to modify chlorinated polyethylene to obtain modified chlorinated polyethylene. This modified chlorinated polyethylene is then blended with polyethylene and silica to obtain a composite modified plastic. The siloxane groups at the end of the modifier can combine with the hydroxyl groups on the silica surface, improving the interfacial bonding between the filler and the polymer, and enhancing the mechanical properties of the material. The pyridine ring forms a stable conjugated π-electron system with benzotriazole, synergistically expanding the ultraviolet absorption range of the material, thereby enhancing its ultraviolet absorption performance. The quaternary ammonium salt structure formed by the combination of the modifier and chlorinated polyethylene can form ion-conducting channels in the polymer matrix, reducing surface charge accumulation and lowering surface resistivity, thus endowing the material with excellent antistatic properties.

The application discloses a weakly conductive polypropylene composite material and a preparation method thereof, which is prepared from 0.1-1 parts of carbon nanotubes, 5-25 parts of inorganic fillers, 0.3-0.9 parts of antioxidants, 0.1-0.5 parts of processing aids, 49-85 parts of polypropylene, 5-10 parts of polyethylene, 3-10 parts of toughening agents and 2-6 parts of compatilizers according to weight parts; the carbon nanotubes are treated at a high temperature above 1200 DEG C. The weakly conductive effect is achieved by adding the carbon nanotubes, the adding amount is very low, the surface resistivity of the polypropylene can be reduced, and the mechanical property of the material is less affected.

The invention relates to the technical field of pre-oxidized fibers, and particularly discloses a cotton spinning pre-oxidized fiber and a preparation method thereof. The preparation method comprises the following steps: mixing a polyacrylonitrile precursor with a first modified oil agent to obtain a pretreated precursor; the first modified oil agent comprises polytetrafluoroethylene dispersion liquid, nano aluminum oxide and a silane coupling agent; carrying out gradient pre-oxidation on the pre-treated precursor in an air atmosphere under the conditions that the temperature is 215-255 DEG C and the tension is 1650-2100 cN, so as to obtain a pre-oxidized fiber; immersing the pre-oxidized fiber into a second modified oiling agent for oiling and curling to obtain a cotton spinning pre-oxidized fiber; the second modified oiling agent comprises an antistatic agent, a bundling agent and a moisture absorption friction increasing agent. According to the invention, the structural stability and antistatic property of the fiber are improved by controlling the condition parameters of pre-oxidation and optimizing the components and proportion of the first modified oil agent and the second modified oil agent, so that the spinnability of the cotton spinning pre-oxidized fiber is improved, and high-quality and large-scale cotton spinning processing of the pre-oxidized fiber is realized.