58results about How to "With electromagnetic shielding effect" patented technology

The invention relates to a circuit board substrate, which comprises a first copper foil layer, a first insulating layer, an epoxy resin composite material layer, a second insulating layer and a second copper foil layer which are sequentially stacked, wherein the epoxy resin composite material layer consists of an epoxy resin composite material, the epoxy resin composite material comprises carboxyl end group polymer modified epoxy resin, a carbon nano tube and an inorganic dispersed material, and the mass percentage of the carbon nano tube in the epoxy resin composite material is 4.6-16%. The invention also provides a manufacturing method of the circuit board substrate.

The present invention relates to the technical field of materials, and in particular relates to a method for preparing a flexible stretchable conductive film with an electromagnetic shielding function. The method comprises uniformly mixing conductive materials (including metal nanowires and nanoparticles, carbon nanotubes, graphene, etc.) with a fluid state polymer (for example, polydimethylsiloxane, PDMS), and preparing a functional glue with excellent electrical conductivity and electromagnetic shielding effectiveness, at the same time preparing a solid stretchable flexible (PDMS) substrateand then attaching the functional glue to the substrate. The conductive film obtained has excellent features of high electromagnetic interference shielding performance (70dB), recyclability (20,000 times), high stretchability (up to 340% for strain of the PDMS), and excellent electrical conductivity (surface resistance (0.2 Omega) etc..

The invention relates to a vehicle antistatic electricity technique, and discloses a tyre with anti-static electrification, comprising tyre lip, tyre wall and tyre cap. A conducting layer extends from the tyre lip through tyre side to tyre cap. The conducting layer of the said tyre lip is mounted on the external surface of the tyre lip and directly contacts with the wheel rim. A ground contact is set on the conducting layer of the tyre cap. The conducting layer is increased in the tyre and wheel rim is grounded. The effect of releasing static electricity is realized by tyre. The invention has features of stable and reliable discharge property, continuous discharge, wear well, beautiful vehicle.

The invention relates to an amorphous alloy-gypsum composite board, a preparation method and an application thereof. The amorphous alloy-gypsum composite board comprises an amorphous alloy strip layer and gypsum layers, wherein the amorphous alloy strip layer is clamped between the gypsum layers, and the whole composite board is integrally cast and formed. The preparation method comprises the following steps: firstly putting amorphous alloy into a mould, exerting certain pre-tensile stress on the amorphous alloy, adding water into gypsum powder and then pouring the mixture into the mould, releasing the pre-tensile stress after the board is formed and detaching the mold, so as to obtain the amorphous alloy-gypsum composite board. The amorphous alloy strip positioning accuracy is achieved, the integrity of the amorphous alloy strip and the gypsum is good, the binding force is strong, and the bending and cracking resistance of the gypsum is improved, the composite board has electromagnetic shielding performance, and meanwhile, the mechanical property and the electromagnetic shielding performance are high in designability.

The invention particularly relates to a power distribution box, and belongs to the technical field of electrical control. By virtue of the power distribution box, electromagnetic interference betweenhigh-voltage and low-voltage components can be avoided, and safety and reliability are achieved; meanwhile, the power distribution box provides an electromagnetic shielding function, so that the normal operation requirement of an electric control box can be satisfied; the power distribution box comprises a box body, a box door and components placed in the box body; one side of the box door is hinged with the power distribution box body through several door hinges; a ring of sealed shielding door frame is arranged in the opening of the power distribution box body; the inner side edge of the shielding door frame is fixedly connected with the power distribution box body, and an electromagnetic shielding door sealed structure is arranged between the outer side edge and the inner side surface of the box door; the electromagnetic shielding door sealed structure comprises a sealed frame substrate and a conductive rubber sealed frame; the sealed frame substrate is fixedly connected with the inner side of the box door; the conductive rubber sealed frame is glued and fixed on the sealed frame substrate through conductive adhesive; and the position of the conductive rubber sealed frame is corresponding to the outer side edge position of the shielding door frame.

The invention discloses a lotus leaf surface-imitated super-hydrophobic film and a preparation method thereof. The super-hydrophobic film comprises a base membrane made of a low surface energy material and a micro / nano structure formed on the base membrane, wherein the micro / nano structure comprises micron particles evenly distributed on the base membrane and nano mastoids grown on the micron particles. The preparation method comprises the following steps: firstly, dispersing oxide nano particles in a modified solution added with a coupling agent, stirring, separating and drying, thus obtaining modified oxide nano particles; then adding an initiator in the modified oxide nano particle solution, heating, and simultaneously dropwise adding a mixed monomer solution of fluorine-containing acrylate monomers and hydroxyl-containing acrylate monomers; mixing with organic silicon modified polyurethane, and adding a catalyst so as to obtain a nano composite solution after reaction; and finally, filming by utilizing the diluted nano composite solution, and drying so as to obtain the lotus leaf surface-imitated super-hydrophobic film. The film discloses by the invention has the advantages ofgood self-cleaning effect, good mechanical property and stability, low cost, environmental friendliness and the like.

The invention discloses an electromagnetic shielding concrete and a preparation method thereof, and relates to the technical field of concrete materials. An electromagnetic shielding concrete is prepared from concrete raw materials comprising the following parts by weight: 450-550 parts of cement, 950-1050 parts of gravel, 500-600 parts of sand, 100-160 parts of zeolite powder, and 120-180 parts of water; The concrete raw material also includes additives and regulators; the additives include the following raw materials in parts by weight: 4-8 parts of carbon fiber, 2-8 parts of steel fibers; the regulator is made up of the raw materials of the following parts by weight: graphite powder 35-45 parts 8-15 parts of amantadine hydrochloride, 15-25 parts of aluminum sol; electromagnetic shielding concrete has the advantage of good electromagnetic shielding performance. The preparation method of the electromagnetic shielding concrete includes the following steps: preparation of additives, preparation of regulators, mixing and preparation of concrete, etc.; it has the advantage of improving the electromagnetic shielding performance of concrete.

The invention discloses a leakage-proof plate. The leakage-proof plate is characterized in that the leakage-proof plate comprises a stainless steel housing, multiple insulators and inserting pins, wherein the insulators are arranged in the stainless steel housing, and the inserting pins correspond to the insulators in a one-to-one mode; the stainless steel housing and the insulators are fixedly connected through a sintering process, and the insulators and the corresponding inserting pins are also fixedly connected through the sintering process; a sealing sleeve is fixed to one side of the stainless steel housing, and one end of each inserting pin penetrates out of the sealing sleeve. Multiple mounting holes are evenly formed in the stainless steel housing. The leakage-proof plate is simple in structure, low in manufacturing cost and high in performance and is used for circuit connection between electronic instruments, electronic instruments of sealed containers, electronic equipment and power supplies, airtightness is good, and the leakage-proof plate has the electromagnetic shielding effect and is suitable for different severe environments of coal mines, airtight power equipment and the like.

The invention discloses a circuit board which comprises a first dielectric layer, a first circuit layer, a second dielectric layer and a second circuit layer. The first dielectric layer is provided with a first surface and a second surface, wherein the first surface is provided with at least one groove. The first circuit layer is arranged on the inner wall of the groove. Furthermore, the second dielectric layer is arranged in the groove and covers the first circuit layer; the second circuit layer is arranged in the groove; and the second dielectric layer is positioned between the first circuit layer and the second circuit layer. The invention also discloses a manufacture method of the circuit board.