22 results about "Rubber material" patented technology

The invention relates to a composite underwater sound transmission rubber material and a preparation method thereof. A component A is prepared through steps of plasticating natural rubber, then adding into an internal mixer for mixing, adding metallic oxide, inorganic filler, active agent and accelerator for mixing, and discharging sheets by an open mill and testing; a component B is prepared through steps of plasticating chloroprene rubber, then adding into the internal mixer for mixing, then sequentially adding stearic acid, antiager, carbon black, inorganic filler and softener for mixing, adding sulphur for mixing, discharging sheets and cooling down; the composite underwater sound transmission rubber material is prepared through steps of mixing the component A and component B according to proportion of 1:1, packaging into triangle, thinning, discharging sheets, sampling for sulfuration test, and sulfurizing at relatively low temperature. The acoustic impedence of the material and acoustic characteristic impedence of water are well matched, the sound attenuation coefficient of sound wave transmitting in sizing material is low, the material has good hydrolytic resistance and silicone oil resistance; the material can be stored for long time, is safe to operate, has high underwater sound transmission performance, and can be sulfurized at low temperature so that the contradiction between low temperature sulfurization and normal temperature storage is relieved.

The invention discloses a flame-retardant and wear-resisting rubber material for a borehole cable sheath and a preparation method of the flame-retardant and wear-resisting rubber material. The flame-retardant and wear-resisting rubber material is prepared from nitrile rubber, natural rubber, triethyl citrate, benzoxazine resin, magnesium dimethacrylate, acetyl benzoyl peroxide, ethanol [2-[2-(2-methoxyethoxy)ethoxy]ethyl], triester with boric acid, gamma-aminopropyltriethoxysilane, polychlorinated terphenyl, dimethyldiethoxysilane, tricresyl phosphate, magnesium hydroxide, white jade powder, microcrystalline wax, hydrogenated rosin resin and the like. By matching the nitrile rubber with the natural rubber for use, the flame-retardant and wear-resisting rubber material has the advantages of good mechanical property and processing property, good oil resistance, wear resistance and chemical corrosion resistance, as well as heat resistance and low temperature resistance; by matching the tricresyl phosphate, the polychlorinated terphenyl and the magnesium hydroxide with sodium aluminum carbonate hydroxide for use, the fire-retardant property is enhanced; by adding the white jade powder, nano- tungsten boride and other fillers, high temperature resistance, wear resistance and other physical properties of the material are enhanced.

A process for the manufacture of thin-walled elasto-porous elements in the form of bushings in metal-rubber material (MR), comprises the steps of: obtaining wire fragments in the form of spirals having a lead equal to the spiral diameter, forming a flat blank from said spiral segments; pressing the blank into a roll; placing the roll into a mold; placing some elastic medium inside said roll; and pressing the roll in several passes by axial compression together with the elastic medium elements transforming the axial compression into radial pressure on the roll to be compressed.

The invention discloses a high-toughness anti-cracking rubber material for a sealing ring. The high-toughness anti-cracking rubber material for the sealing ring is prepared by using the following raw materials in parts by weight: 100 to 120 parts of ethylene propylene diene monomer rubber, 5 to 10 parts of methyl vinyl silicone rubber, 60 to 80 parts of white carbon black, 2 to 4 parts of zinc oxide, 0.15 to 0.25 part of dibenzoyl peroxide, 1.5 to 2.5 parts of sulfur S80, 1.5 to 2.5 parts of anti-aging agent MB, 0.3 to 0.5 part of accelerator TMTD, 1 to 2 parts of ethyl cellulose, 2 to 4 parts of methyltrimethoxysilane, 0.5 to 1 part of tetrabutyl titanate, 0.15 to 0.25 part of titanate coupling agent NDZ-401, 6 to 8 parts of nano-graphite powder, 4 to 6 parts of castor oil and 0.5 to 1 part of glycidyl methacrylate. The rubber material disclosed by the invention has good wear resistance and long-lasting friction-reducing performance, simultaneously has high toughness and good anti-cracking performance, is long in service life, is good in sealing performance and is suitable for being used as a sealing ring material.

The invention discloses novel rubber good in oil resistance. The novel rubber comprises 15-35 parts of chlorinated ethylene propylene rubber, 20-30 parts of butadiene-acrylonitrile rubber, 25-40 parts of fluoride rubber, 3-7 parts of zinc oxide, 5-10 parts of calcium borate, 3-8 parts of magnesium methacrylate, 10-15 parts of white carbon black, 20-40 parts of paraffin, 12-20 parts of bismaleimide resin, 15-28 parts of phenol-urea-formaldehyde copolycondensation resin, 2-7 parts of 2-(p-benzyl-chloride-sulfhydryl-thioxo) benzimidazole and 15-22 parts of anti-aging agent. The novel rubber is prepared through a process of plastication, mixing, vulcanization, drying, cooling and standing and the like. According to the prepared novel rubber, the use of a rubber material in the environment filled with oil is met, and original rubber performances are not affected. The oil resistance (the expansion rate after oil soaking) of the novel rubber is 6.5-8.5%, the heat-resistant coefficient (the coefficient of thermal aging) is 0.61-0.78, the air tightness is 2.5-2.8 m2/s.Pa, and the tear resistance is 58-63 kN.m.

The invention relates to a high-strength marine rubber fender. Rubber raw materials consist of the following components in parts by weight: 70-90 parts of natural rubber 1#, 30-50 parts of chloroprene rubber 21, 2-3 parts of stearic acid, 1-2 parts of paraffin, 15-25 parts of hard carbon black, 2-3 parts of anti-aging agent DTPD, 2-4 parts of vulcanizing agent TRA, 20-30 parts of calcium carbonate, 3-5 parts of zinc oxide, 4-5 parts of magnesium oxide, 2-5 parts of Vaseline, 0.3-0.5 part of accelerant DM, 1.1-1.3 parts of accelerant TT, 0.9-1.1 parts of anti-aging agent 4010 and 0.9-1 part of anti-aging agent D, wherein the anti-aging agent DTPD is domestically called an anti-aging agent 3100 which has the Chinese name of N,N'-xylyl-p-phenylenediamine mixture, the vulcanizing agent TRA is also called DPTT which has the Chinese name of tetra-sulfide bis(pentamethylene) thiuram and the molecular formula of C12H20N2S4, the accelerant DM has the Chinese name of 2,2'-dithio-dibenzothiazole and the molecular formula of C14H8N2S4, the accelerant TT has the Chinese name of disulfide tetramethyl thiuram and the molecular formula of C6H12N2S4, the anti-aging agent 4010 has the Chinese name of N-isopropylbenzene-N-phenylene-p-phenylenediamine, and the anti-aging agent D has the Chinese name of N-phenyl-2-naphthylamine and the molecular formula of C16H13N. According to the high-strength marine rubber fender, the tensile breaking strength of the rubber fender is improved through changing the proportions of a rubber material, a polar material and polysulfur bonds.

A rubber mold for molding a resin 2 is provided with a cavity 213 for filling therein a thermoplastic resin in a molten state by applying pressure. The rubber mold 2 includes a core mold 21 made of a rubber material and provided with the cavity 213 and a base mold 22 made of a rubber material and having such a shape that the core mold 21 is to be placed therein. The core mold 21 is formed by combining a pair of split mold parts 211 which is divided on splitting surfaces 212 for opening the cavity 213. The base mold 22 has a bottom part 221 and a pair of first side parts 222 formed on two opposite sides in a direction in which the plurality of split mold parts are aligned with each other.

The invention discloses a negative pressure adjustable and universally rotatable tumor removing auxiliary device which comprises a tumor removing auxiliary device. The tumor removing auxiliary device is composed of a negative pressure device, an air inlet pipe, a universal rotating device and a sucking disc. The air inlet pipe is connected to the negative pressure device, the air inlet pipe is composed of a first air inlet pipe and a second air inlet pipe, one end of the second air inlet is connected to the first air inlet pipe while the other end of the second air inlet pipe is connected to the universal rotating device, and the universal rotating device is composed of an outer housing and a universal ball. According to the negative pressure adjustable and universally rotatable tumor removing auxiliary device disclosed by the invention, the first air inlet pipe is a member made from an elastic rubber material and can stretch; the universal ball can rotate universally when the tumor removing auxiliary device is used; the connection of the inner side and the outer side of the sucking disc is of an elastic folding structure; when tumors are removed, the sucking disc becomes large and small by rotating the sucking disc, so that the size of the sucking disc is matched with the size of the tumor, and the sucking disc sucks the tumor better.

The invention discloses a hydrophobic butadiene rubber material. The material is prepared from, by weight, 0.2-0.3 part of azodicarbonamide, 2-4 parts of calcium stearate, 30-40 parts of carbon nano tubes, 50-60 parts of hydroxyl-terminated polybutadiene, 200-300 parts of N-methylpyrrolidone, 5-7 parts of boric oxide, 160-200 parts of butadiene rubber, 2-3 parts of anti-aging agent 4010, 1.3-2 parts of sulphur, 10-13 parts of trifluoroethyl methacrylate, 1-3 parts of nickel aminosulfonate, 3-5 parts of tetraethoxysilane and 0.5-1 part of ethylene thiourea. Trifluoroethyl methacrylate is added, and the hydrophobic performance of the finished material surface is effectively improved.

The invention provides a preparation method of an ablation-resistant low-thermal-conductivity composite material. The heat insulation layer is prefabricated into the mode that the ablation-resistant layer and the heat insulation layer are alternately compounded, and the ablation-resistant layer serves as a functional layer in direct contact with a propellant, can bear the high temperature of 2000 DEG C or above and can effectively resist thermal oxygen erosion and high-speed solid-phase particle scouring; the thermal insulation layers and the ablation-resistant layers are alternately stacked, on one hand, the number of alternate layers is increased, the thickness of a single layer is reduced, fibers with the large length-diameter ratio are oriented in the ablation-resistant layers to generate a fiber densification effect, and therefore the anti-scouring performance of the ablation-resistant rubber material is improved; the heat insulation layers and the ablation-resistant layers are alternately arranged, so that a heat conduction channel formed by the high-heat-conduction fibers in the thickness direction of the heat insulation layers can be cut off, meanwhile, the interface heat resistance can be increased by increasing the number of the alternate layers, and therefore the heat insulation performance of the material is improved.

The invention discloses an internal and external rubber material special for an automobile R744 air conditioner rubber hose and a manufacturing method thereof, and belongs to the technical field of rubber and plastic polymer application. The internal and external rubber material comprises the following components (in parts by weight): 100 parts of special silica gel rubber compound; 1-3 parts of a black coloring agent; 3-5 parts of an extrusion modifier; 8-16 parts of a strong polarity modifier; and 0.8 to 1.2 parts of a vulcanization system. According to the invention, the continuous processing technology requirement of the R744 air conditioner pipe can be met, the production efficiency is greatly improved, and the adhesive force with adjacent metal layers (a stainless steel corrugated pipe and a copper-plated steel wire) reaches the standard except that the physical property of the sizing material can resist the temperature of-40 to 165 DEG C.

The invention relates to a urine buffer stream guidance instrument which prevents a disabled male patient from wetting a bed and trousers due to senile dementia and uracratia, in particular to a male genital organ stationary type urine buffer stream guidance instrument. A main structure of the male genital organ stationary type urine buffer stream guidance instrument comprises a universal type urine buffer stream guidance instrument which is composed of a buffer sleeve opening edge, a buffer sleeve, a round cylinder support, a connecter, a stream guidance pipe, an expanding head and a pipe head and a multi-functional male genital organ fixing device which is formed by respectively and evenly arranging three open connecting rings on a fixed ring. The buffer sleeve is made of soft rubber materials. The round cylinder support is arranged on the middle portion of the buffer sleeve, and the buffer sleeve is not easy to twist and paste when used. The bottom portion of the buffer sleeve is provided with the connecter which is integrally composed of the expanding head and the pipe head, the pipe head is sleeved with the stream guidance pipe, and the buffer sleeve and the stream guidance pipe are connected into a whole and keep unblocked. The three open connecting rings are respectively and evenly arranged on the buffer sleeve opening edge of the universal type urine buffer stream guidance in the male genital organ fixing device to form the male genital organ stationary type urine buffer stream guidance instrument.

The invention discloses a preparation method for a composite material of a corrugated pipe of a natural gas pipeline. The method takes the following materials in parts by weight as raw materials: 70-80 parts of acrylic rubber, 25-30 parts of brominated butyl rubber, 10-15 parts of fluororubber, 6-10 parts of white carbon black, 15-18 parts of polytetrafluoroethylene, 8-12 parts of dioctyl phthalate, 4-6 parts of gum easy T-78, 0.5-0.8 part of zinc oxide, 1-2 parts of ferrocene, 2-4 parts of zinc stearate, 0.3-0.6 part of lead tetraoxide, 3-6 parts of accelerant TBZTD and 5-8 parts of accelerant CZ. According to the invention, three rubber materials are taken as the main raw materials, and meanwhile, the organic and inorganic auxiliary materials are added and the prepared composite material has higher elasticity and higher material strength. The corrugated pipe of the natural gas pipeline prepared from the material not only can meet the strength requirement of the natural gas pipeline but also has better compressible deformability.

The invention relates to the technical field of plastic molding or connection, and discloses a device for preventing air existing in a charging barrel and a runner from influencing molding after injection molding start and stop. The device comprises the charging barrel, a first guide rail is fixedly connected to the interior of the charging barrel, and a fixing block is fixedly connected to the surface of the first guide rail. According to the device for preventing air existing in the charging barrel and the runner from influencing molding after injection molding start and stop, a rotating rod rotates to drive a sliding block to slide in a sliding groove formed in the surface of an annular push plate, and then the annular push plate pushes and presses redundant rubber and air in the charging barrel up and down and discharges the redundant rubber and air; the annular push plate moves up and down and drives a sliding plate to move up and down, gear teeth arranged on the surface of the sliding plate are engaged with a gear to enable the gear to rotate, and therefore a swing rod rotates and drives a connecting rod to push a sliding plug with an ejection block to be repeatedly ejected in a runner opening, redundant rubber materials and air in the runner opening are discharged, and the effects of quickly and effectively removing the residual air between the charging barrel and the runner and improving the injection molding efficiency and quality are achieved.

The invention discloses a rubber mixing formula using a vulcanizing agent as well as a production process thereof, and belongs to the field of rubber mixing. The rubber mixing formula is prepared by mixing the following raw materials in parts by weight: 100 parts of raw rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of RL-20, 4 parts of PEG-4000, 4 parts of carbon black, 20 partsof black factice, 110 parts of paraffin oil and 15 parts of a vulcanizing agent. The scorching time of the rubber can be significantly prolonged, the Mooney viscosity can be reduced, the tensile strength of the rubber is significantly optimized, the storage property of the rubber is further improved, and transportation and processing are facilitated; and various raw materials can be mixed completely and various properties of the rubber material can be further improved.