769 results about "Silicone rubber" patented technology

The invention discloses a co-extrusion shielding medium-voltage power cable, and relates to the technical field of cables, the outer side of an inner reinforcing rope is provided with a supporting flame-retardant assembly, the outer side of the inner reinforcing rope is sleeved with a reinforcing spiral, the outer side of the reinforcing spiral is sleeved with a heat conduction pipe, a flame-retardant bag is installed between adjacent supporting rods, and one side of a heat conduction film is bonded with a flame-retardant silica adhesive tape. According to the invention, the reinforced connecting rods embedded in the reinforced through holes can extrude the supporting rods to deform, so that bending is resisted, and excessive bending deformation is prevented; heat generated in the use process of the cable can be dispersed to other positions of the cable, local overheating of the cable is prevented, influences on other inner conductors are reduced due to various reasons such as cooling, fire extinguishing and keeping away of the inner conductors, it is guaranteed that the cable can work normally for a longer time, and the other normal inner conductors are protected.

The invention provides an anti-extrusion cable and a cable connection structure, and relates to the technical field of cables.The anti-extrusion cable comprises a cable body, the cable body comprises a middle sheath, a shielding layer, a plurality of guide cores, a filling layer and an inner insulating sheath, the guide cores are evenly arranged on the inner side of the middle sheath, and the shielding layer is arranged on the inner side of the middle sheath; the guide cores, the inner insulating sheaths and the shielding layers are arranged in a one-to-one correspondence manner, the inner insulating sheaths tightly wrap the outer sides of the guide cores, the shielding layers tightly wrap the outer sides of the inner insulating sheaths, and the filling layers are filled in gaps between the shielding layers and the middle sheath; a middle sheath of a cable main body is made of chloroprene rubber materials and provides stable support for an internal structure, a spiral spring steel wire fixedly sleeved on the outer side of the middle sheath can effectively disperse external extrusion acting force and improve the overall anti-extrusion performance of the cable, and a silicone rubber layer coated on the outer side of the steel wire is tightly attached to the steel wire and extends to the outer wall of the middle sheath to be in hot melting connection, so that the service life of the cable is prolonged. And extrusion impact can be buffered in an auxiliary manner.

The invention relates to the technical field of protective film preparation, and particularly discloses an antistatic silica gel protective film and a preparation method thereof.The protective film comprises a base material layer and an antistatic coating coated on the surface of the base material layer; the base material layer is prepared from methyl vinyl silicone rubber, modified fumed silica, a compound antistatic agent A and a vulcanizing agent, and the antistatic coating is prepared from a compound antistatic agent B and water-based acrylic resin. The preparation method comprises the following steps: banburying, calendering and vulcanizing a compound antistatic agent A, methyl vinyl silicone rubber and modified fumed silica to form the base material layer; and finally, mixing the compound antistatic agent B with water-based acrylic resin to prepare an antistatic coating solution, coating the surface of the base material layer with the antistatic coating solution, and drying and curing to obtain a finished product. The silica gel protective film prepared by the invention has excellent antistatic property, mechanical property, adhesive force and high light transmittance, and is suitable for the fields of electronic equipment screens, optical lenses and the like.

A tamper for making paraffin blocks for histology may include a pliable tamper head and a handle. The handle may be permanently or removably attached to the tamper by using screws, magnets, or the like. The tamper may be made from a pliable material, such as a silicone rubber, with improved thermal transfer and high latent heat. In use, the tamper may be warmed in advance to a working temperature by placing the tamper on a hot plate of the embedding station or on a dedicated smaller hot plate. Alternatively, the tamper may be heated with an electric resistive element, a thermoelectric device, or an electric induction coil.

The invention relates to a nanometer enhanced intelligent monitoring silicone rubber cable and a preparation method thereof, and the cable comprises a conductor unit and a nanometer composite insulating layer which is extruded at the outer side of the conductor unit; the gradient shielding structure is sequentially arranged on the outer side of the nano composite insulating layer in a sleeving mode, the gradient shielding structure, the inner tinned monofilament braid layer and the middle aluminum-plastic composite heat insulation wrapping tape are bonded through a conductive adhesive layer, and fiber bundles of the outer basalt fiber braid layer are embedded into surface grooves of the middle aluminum-plastic composite tape to form a mechanical interlocking structure; the distributed sensing unit is embedded between the middle shielding layer and the outer shielding layer, and the outer sheath layer is extruded on the outer side of the gradient shielding structure. According to the invention, the problems of poor aging resistance, weak shielding and sensing distortion of a traditional cable are solved. The tensile strength retention rate after aging at 150 DEG C is greater than or equal to 85%, the electromagnetic interference attenuation is improved by 14dB, the signal distortion rate during bending is less than or equal to 5%, and the cable is suitable for intelligent monitoring in high-temperature, high-humidity and strong-corrosion environments.

The invention discloses a high-elasticity anti-aging foamed silica gel sealing element, and belongs to the technical field of sealing materials. The silicone rubber is prepared from raw materials including methyl vinyl silicone rubber, fumed silica, hydroxyl-terminated polydimethylsiloxane and the like according to specific parts by weight through the processes of mixing, foaming vulcanization and the like. The apparent density of the sealing element is 0.3-0.6 g / cm < 3 >, the Shore A hardness is 25-45 degrees, the tensile strength is larger than or equal to 2.5 MPa, the elongation at break is larger than or equal to 350%, the performance retention rate is high after the sealing element is aged for 1000 h at the temperature of 150 DEG C, and the sealing element has excellent elasticity and aging resistance. The surface of the anti-slip sealing gasket can be provided with anti-slip textures to meet sealing requirements in the fields of automobiles, electronics and the like, and is long in service life and high in practicability.

The invention provides methyl vinyl silicone rubber. The methyl vinyl silicone rubber is prepared from the following raw materials in parts by weight: 85 to 95 parts of methyl vinyl silicone rubber raw rubber, 27 to 35 parts of modified filler, 0.3 to 1.5 parts of vulcanizing agent, 0.5 to 1.5 parts of assistant crosslinking agent and 0.2 to 0.8 part of bulking agent, the modified filler is prepared from the following raw materials: chitosan, a filler and methacrylic acid, and the dosage ratio of the chitosan to the filler to the methacrylic acid is (25-35) g: 22g: (0.07-0.15) mol; the filler comprises hydroxyapatite and silicon dioxide. The invention also provides a preparation method of the methyl vinyl silicone rubber. The methyl vinyl silicone rubber provided by the invention has excellent tensile strength and damp-heat aging resistance.

This invention discloses a flame-retardant silicone rubber for cables and its preparation method, belonging to the field of cable material technology. By copolymerizing methyl vinyl silicone rubber with flame-retardant modified spiky hollow microspheres, the flame-retardant modified spiky hollow microspheres can be fixed in the silicone rubber network. The flame-retardant modified spiky hollow microspheres themselves are inorganic high-temperature resistant ceramic materials. The hollow structure can form a physical heat insulation and oxygen barrier layer, blocking heat transfer and oxygen penetration, and delaying the thermal decomposition of the matrix. The grafted phosphorus-based flame-retardant groups and the nitrogen element of 4-aminobenzoic acid form a phosphorus-nitrogen synergistic chemical flame retardant. During combustion, a dense carbon layer is quickly generated, which inhibits flame spread, reduces heat release rate, and has excellent smoke suppression and toxicity reduction effects, meeting the stringent requirements for cable fire safety.

The utility model discloses an internal hidden type customized household lamp belt groove, which belongs to the technical field of lamp belt grooves and comprises lamp grooves, positioning pin blocks are inserted between the adjacent lamp grooves, rivets penetrate through the centers of overlapped areas of the positioning pin blocks and the corresponding lamp grooves, and lamp covers are clamped at the opening ends of the lamp grooves. Heat dissipation holes are formed in the lower half portion of the side face of the lamp trough in an array mode, partition plates are integrally and symmetrically arranged on the inner wall of the lamp trough, a lamp belt is bonded to the upper portions of the partition plates through silicon rubber, and the heat dissipation holes are evenly formed in the lower half portion of the side face of the lamp trough, so that a heat dissipation cavity for ventilation can be formed in a trough body of the lamp trough; the LED lamp strip installed on the partition plate in the groove body is further subjected to ventilation and heat dissipation treatment, so that continuous high temperature of a light-emitting area of the LED lamp strip caused by a closed structure is avoided, and the service life of the LED lamp strip is prolonged by reducing high-temperature loss of the LED lamp strip.

The application relates to a kind of injection molding equipment of hybrid insulator, including injection unit, mould unit, electric control unit, temperature control unit, hydraulic control unit, rack and safety protection unit, injection unit includes feeding mechanism, plasticizing mechanism and injection mechanism, feeding mechanism is used to receive high-temperature vulcanized solid silicone rubber and output after high-temperature vulcanized solid silicone rubber is compacted and exhausted, plasticizing mechanism is used to receive high-temperature vulcanized solid silicone rubber sent by feeding mechanism and output after high-temperature vulcanized solid silicone rubber is once plasticized, injection mechanism is used to receive high-temperature vulcanized solid silicone rubber sent by plasticizing mechanism and output after high-temperature vulcanized solid silicone rubber is twice plasticized.The application is more compact by setting two-stage plasticizing, and high-temperature vulcanized solid silicone rubber is injected into mould in better flowability, and the performance of the covering layer of the finally formed hybrid insulator is more excellent, and the product quality of hybrid insulator is improved.

The utility model discloses a kind of flexible inner container pressure-bearing hot water storage tank, belong to the technical field of hot water storage equipment, including water storage tank main body, water inlet pipe is installed on water storage tank main body upper end, water outlet pipe is installed on water storage tank main body lower end, flexible inner container is fixedly connected in water storage tank main body, multiple evenly distributed pressure-bearing rings are arranged between flexible inner container and water storage tank main body inner wall, pressure-bearing ring includes the connecting ring being connected with water storage tank main body inner wall, multiple evenly distributed elastic contact rods are embedded and arranged in connecting ring, flexible connecting rod is connected between each elastic contact rod and flexible inner container, the flexible inner container is made of fluorine rubber, silicon rubber or temperature-resistant polyurethane material, elastic contact rod is made of elastic metal material, and rubber layer is covered on the surface of elastic contact rod, can be realized through setting pressure-bearing ring, can promote its inner flexible inner container when storing water has stronger buffering effect, improve the pressure-bearing performance of flexible inner container.

The invention discloses a composite film, a composite film preparation method and a microphone. The composite membrane comprises a fiber membrane layer, the fiber membrane layer is provided with a plurality of pores, the pores are filled with silicone rubber filler, and / or at least one surface of the fiber membrane layer in the thickness direction is covered with a silicone rubber layer. The fiber membrane layer can provide high mechanical strength for the composite membrane, and the silicone rubber filler filled in the gaps and / or the silicone rubber layer covering the surface of the fiber membrane layer can improve the waterproof performance of the composite membrane, so that the overall strength and waterproof performance of the composite membrane can be improved.

This product is a rice cooking aid made of silicone rubber that is placed together with the rice when cooking.

The invention discloses high-heat-insulation ceramic silica gel foam, and relates to the technical field of high-temperature-resistant silica gel. The high-heat-insulation ceramic silica gel foam is prepared from the following components in parts by mass: 100 parts of methyl vinyl silicone rubber, 15 to 40 parts of ceramic silicon resin, 15 to 25 parts of a flame retardant, 3 to 15 parts of fumed silica, 0.5 to 5 parts of hydrogen-containing silicone oil, 0.1 to 2 parts of a platinum catalyst, 2 to 10 parts of an azodicarbonamide foaming agent, 1 to 8 parts of a ceramic accelerant, 0.5 to 3 parts of a heat-resistant additive and 5 to 8 parts of reinforcing filler. Compared with the prior art, the material disclosed by the invention can quickly form a compact ceramic layer at a high temperature, can more effectively block heat transfer, avoids sharp reduction of mechanical properties or structural damage of the material in a high-temperature environment, and is more excellent in high-temperature use stability.

The utility model belongs to the technical field of silicone rubber production, and particularly relates to feeding equipment for silicone rubber production, which comprises a rack, a feeding bin fixedly embedded in the middle of the rack, a cover plate arranged at the top of the feeding bin, a hollow shaft motor arranged at the top of the cover plate and connected with the feeding bin through a fixing mechanism. The output end of the hollow shaft motor is connected with a rotating shaft in the feeding bin; the fixing mechanism comprises fixing seats, the fixing seats are symmetrically arranged on the outer side of the feeding bin, connecting rods penetrating through the cover plate are arranged at the symmetrical positions of the symmetrical top of the cover plate, sleeve shafts penetrating through the fixing seats are rotationally installed in the middles of the fixing seats, and the sleeve shafts are matched with the connecting rods; the gear ring can be driven to rotate through the driving rod, then the multiple sleeve shafts are driven to rotate at the same time, after the clamping blocks are driven to move to the positions corresponding to the openings in the lower ends of the rail grooves in the rail grooves, the cover plate can be disassembled by pulling up the cover plate, the cover plate can be disassembled conveniently and rapidly, and therefore the interior of the feeding bin can be cleaned or overhauled and maintained regularly, and practicability is high.

The invention provides fluorine-containing hyperbranched polysiloxane modified resin and a preparation method thereof as well as an unvulcanized silica gel soft film and a preparation method thereof, and belongs to the field of silica gel molds. After the fluorine-containing hyperbranched siloxane is introduced, the fluorine-containing hyperbranched siloxane is large in size and higher in polarity than methyl, the regular spiral structure of a main chain can be broken, close packing between molecular chains is reduced, crystallization driving force is reduced, shrinkage caused by crystallization is inhibited, and it is guaranteed that in the preparation process of parts with complex structures formed by the composite material, the specific surface area of the composite material is increased; and the final part tolerance is small. The fluorine-containing hyperbranched polysiloxane can improve the entanglement density of a molecular chain and limit the free contraction movement of the vulcanized molecular chain, and meanwhile, the fluorine-containing hyperbranched chain segment can absorb energy through deformation under the action of external force, so that the tear toughness, tensile strength and reusability of the mold are remarkably improved.

The application relates to the technical field of robot preparation, in particular to AI intelligent simulation robot silicone rubber and a preparation method thereof. The silicone rubber is prepared from the following components: modified polysiloxane 35-62 parts, filler 15-35 parts, solvent 100-300 parts, crosslinking agent 21-35 parts, additive 12-25 parts, dispersion aid 1-3 parts, polyvinylpyrrolidone 8-12 parts, antibacterial agent 6-18 parts, polydopamine 2-5 parts and hydrogen-containing silicone oil 2-9 parts. The prepared silicone rubber has lower hardness, softer and smoother touch, is closer to human skin, and has excellent flexibility, ductility and high and low temperature resistance.

Provided are a sound-generating device and an electronic terminal. The sound-generating device includes an annular housing, a lower cover fixed to a side of the housing, an upper cover extending inward from the other side of the housing and enclosing to form a sound-generating hole, and a sound-generating unit supported on and fixed to a side of the upper cover close to the lower cover and located in the housing. The sound-generating unit, the housing, and the lower cover jointly enclose a rear cavity, and a sound-generating side of the sound-generating unit directly faces the sound-generating hole. The sound-generating device further comprises an annular first silicone rubber member injection-molded into the housing, the first silicone rubber member seals and surrounds a peripheral side of the sound-generating unit, and the first silicone rubber member abuts against inner sides of both the upper cover and the housing to seal the rear cavity.

The invention discloses a self-lubricating rubber material as well as a preparation method and application thereof. The self-lubricating rubber material comprises the following components in parts by weight: 80-120 parts of silicon-containing rubber, 30-70 parts of fumed silica, 15-35 parts of phenyl silicone oil, 3-10 parts of amino silicone oil, 5-15 parts of calcium oxide, 3-6 parts of a vulcanizing agent and 2-5 parts of an antibacterial agent. The granularity of the calcium oxide is 500 to 3000 meshes; the viscosity of the phenyl silicone oil at 25 DEG C is 500-1000 mm < 2 > / s. The self-lubricating rubber material provided by the invention has long-acting self-lubricating performance, excellent mechanical performance and excellent aging resistance, can be used as an excellent sealing material, and is widely applied to gate valve switch sealing in the fields of municipal water supply and drainage, petrochemical engineering, industrial pipelines, fire fighting systems and the like.

This application provides a flame-retardant silicone and its preparation method. In this flame-retardant silicone, through the synergistic effect of boron-containing polysiloxane prepolymer and functionalized boron nitride, the flame-retardant silicone has an afterflame time of ≤5s at 800℃, an oxygen index of ≥36%, and has passed UL94V-0 certification. It can quickly form a ceramic barrier layer at high temperatures, effectively preventing flame propagation. The helical structure of the siloxane main chain, combined with the reinforcing effect of functional fillers such as nano-fumed silica, low-melting-point glass powder, and activated inorganic smoke suppressant and flame retardant, makes the tensile strength of the flame-retardant silicone ≥45N, and the permanent tensile modulus retention rate ≥85% under 125% radial shrinkage, exhibiting excellent tear resistance. This flame-retardant silicone is suitable for applications requiring high flame-retardant performance, such as new energy cables and electronic device protection.

The invention relates to the technical field of silicone rubber, and discloses a preparation method of high-transparency extruded and precipitated silicone rubber. The preparation method comprises the following steps: adding a silicone rubber compound and modified titanium dioxide into an internal mixer for mixing, then adding a vulcanizing agent, carrying out thin-passing after mixing, and carrying out extrusion molding and vulcanization on the rubber compound in an extruder to obtain the high-transparency extruded precipitated silicone rubber. The organic silicon modifier contains a large amount of carboxyl, so that coating modification and surface modification of titanium dioxide are effectively realized, agglomeration of titanium dioxide is reduced, compatibility between titanium dioxide and silicone rubber polysiloxane molecular chains is improved, titanium dioxide is uniformly dispersed in a silicone rubber matrix, and a better reinforcing effect is achieved; the tensile property and the tearing strength are obviously improved, and the obtained silicone rubber is high in transparency and good in mechanical property.

A composition obtainable by mixing (a) a crosslinker or a crosslinker mixture obtainable by reacting (HX(CRc2)oY(CRc2)oX(CRc2)o)4-pSiKp, and (b) metal catalyst and (c) amino silane is provided.

The application discloses a kind of temperature-resistant wear-resistant three-layer insulated wire and preparation method thereof, it is related to cable technical field.The preparation method of the application is: the surface of conductor material is extruded and packed inner layer material to form inner insulation layer, then the surface of inner insulation layer is extruded and packed modified silicone rubber to form middle layer, then the surface of middle layer is extruded and packed outer layer material to form outer insulation layer, and high-temperature-resistant flame-retardant cable material is obtained after curing.In which, inner layer material is made of low-density polyethylene, antioxidant 1010, insulation particle, voltage stabilizer and the like;Modified silicone rubber is made of silicone rubber, boron nitride compound, modified magnesium oxide and the like;Outer layer material is made of inner layer material, boron nitride compound.The introduction of insulation particle, voltage stabilizer, boron nitride compound and the like components effectively improves the high-voltage resistance, aging resistance, wear resistance and temperature resistance of crosslinked polyethylene insulated power cable wire.Therefore, the application has wide application prospect.

The utility model belongs to the technical field of rubber processing, and particularly relates to a silicone rubber production rubber cutting device which comprises a machine body and two connecting plates, fixing pieces are fixedly connected to the front side and the rear side of the outer wall of the machine body, vertical plates are fixedly connected to the adjacent sides of the multiple fixing pieces, sliding grooves are formed in the adjacent sides of the two vertical plates, and the connecting plates are fixedly connected to the vertical plates. Sliding blocks are fixedly connected to the sides, away from each other, of the two connecting plates, fixing holes are formed in the sides, away from each other, of the two sliding blocks, clamping strips are slidably connected to the outer walls of the two vertical plates, and the outer walls of the clamping strips are fixedly connected to the inner walls of the fixing holes; the adjacent sides of the two connecting plates are each rotationally connected with a pressure roller frame. According to the utility model, the sliding block is manually adjusted and operated to slide in the sliding chute, and after the connecting plate reaches a proper height, the height adjustment of the lower pressing roller frame is completed, so that a certain downward pressure is applied to the top of the silicon rubber in the transportation process, and the track of the silicon rubber is prevented from deviating.

The utility model discloses an anti-seismic optical fiber groove for optical fiber cable installation, which comprises a U-shaped groove channel, two sides of the U-shaped groove channel are respectively and fixedly provided with two screw installation sheets, and two sides of a top opening of the U-shaped groove channel are respectively and fixedly provided with three semicircular strips; the n-shaped top cover is installed on the outer side of a top opening of the U-shaped channel, three semicircular grooves are formed in the inner walls of the two sides of the n-shaped top cover, and the three semicircular grooves are matched with the corresponding semicircular strips; the two plugging structures are matched with the two ends of the U-shaped channel; and the multiple damping structures are all installed on the inner wall of the bottom of the U-shaped channel, the same damping plate is fixedly installed at the tops of the multiple damping structures, and a plurality of clamping strips are fixedly installed at the top of the damping plate. The titanium alloy belleville springs and the silicon rubber damping columns form a composite damping system, the anti-seismic effect is improved, the rubber semicircular strips are matched with the semicircular grooves in a clamped mode, three-point type elastic sealing is achieved, and the mounting and sealing effects are improved.

This invention relates to a preparation method and application of a two-component fire-retardant, high-temperature resistant sealant, belonging to the field of sealant technology. The sealant comprises component A and component B; component A contains α,ω-dihydroxy polydimethylsiloxane, methylphenyl silicone rubber, dimethyl silicone oil, filler, flame retardant additive, and curing accelerator; component B contains dimethyl silicone oil, silane coupling agent, crosslinking agent, catalyst, and dehydrating agent. The flame retardant additive, containing phosphate ester groups, -Si-O-Si- segments, and a nitrogen-containing triazine ring structure, is prepared via a three-step method. The flame retardant additive of this invention, through the synergistic flame retardancy of phosphorus, nitrogen, and silicon and reactive anchoring design, enables the sealant to possess excellent fire-retardant properties, high-temperature resistance, and mechanical properties, making it suitable for sealing and protection in fields such as electronics, aerospace, and building curtain walls.

The utility model belongs to pipeline technical field especially, it relates to a kind of extruded heat insulation silica gel sleeve, including the silica gel base material layer enclosed into tubular, ceramicized silicone rubber layer is provided on the silica gel base material layer outer surface, carbon black silica gel layer is provided on the ceramicized silicone rubber layer outer surface, the silica gel base material layer platinum gold vulcanization treatment, improve heat insulation performance by the above structure setting.

This application relates to the field of hydrosilylation, and in particular to a highly efficient catalyst for hydrosilylation reactions and its preparation method. This application provides a method for preparing a microcapsule-form catalyst, which first modifies methyl-terminated hydroxyl silicone oil with silazane, and then forms a microcapsule coating system with paraffin, thereby improving the release performance of the microcapsule coating system, so that the catalyst has low reactivity in the early stage of release, thereby improving the uniformity of the reaction process inside the silicone rubber, and thus improving the transparency and overall strength of the silicone rubber.

The invention belongs to the technical field of high polymer materials, and particularly relates to high-thermal-conductivity and high-strength solid silicone rubber and a preparation method thereof. The high-thermal-conductivity and high-strength solid silicone rubber provided by the invention is prepared from the following raw materials in percentage by weight: 3%-30% of methyl vinyl silicone rubber, 3.1%-4.6% of white carbon black, 0.1%-1% of a white carbon black modifier, 0.3%-0.6% of a cross-linking agent, 0.01%-0.03% of a catalyst and the balance of filler, totaling 100%. The thermal conductivity of the high-thermal-conductivity and high-strength solid silicone rubber reaches 2.01 W / m.K and is superior to that of a traditional material, the heat conduction bottleneck of a charging gun can be effectively solved, and the heat dissipation efficiency is improved.

The invention discloses an electric arc indication composition suitable for an insulator silicone rubber surface and a preparation method thereof, and belongs to the technical field of functional materials of electrical equipment. The composition comprises the following components in percentage by mass: 0.1-20% of main functional particles, 5-50% of a film-forming material, 60-80% of a solvent and 0-20% of an auxiliary agent, wherein the main functional particles are colored particles coated with Co3 (PO4) 2.8 H2O and ester materials or a combination of the Co3 (PO4) 2.8 H2O and the ester materials; according to the electric arc indicating composition, through the swelling effect of the solvent on the silicon rubber substrate and the synergistic reaction of all the components, the adhesive force and durability of the electric arc indicating composition on the low-surface-energy silicon rubber of the insulator are remarkably improved, and when an electric arc occurs on the surface of the insulator, generated local high temperature triggers the thermochromic combined material to generate irreversible color change; therefore, the position of arc generation can be recorded and indicated visually and permanently.