70results about How to "Increased tensile yield strength" patented technology

A pipe for connecting to a similar adjacent pipe. The pipe has a male end with a plurality of rigid fingers extending from within and out of at least one exterior circumferential groove disposed on its exterior surface. On the female end is at least one interior circumferential groove sized and positioned to receive the plurality of rigid fingers from a corresponding exterior circumferential groove on the male end of an adjacent pipe. The number of exterior circumferential grooves on the male end typically corresponds to the number of interior circumferential grooves on the female end. When the male end of the pipe inserts into the female end of a similar adjacent pipe, the plurality of rigid fingers is received within a corresponding interior circumferential groove on the female end, thereby preventing the male end of the pipe from being withdrawn from the female end of the similar adjacent pipe.

A pipe for connecting to a similar adjacent pipe. The pipe has a female end with a plurality of rigid fingers extending into the space within the female end. The plurality of rigid fingers extends from at least one interior circumferential groove on the interior surface of the female end. On the male end of the pipe there is at least one exterior circumferential groove that is sized and positioned to receive the plurality of rigid fingers from a corresponding interior circumferential groove on the female end of an adjacent pipe. The number of interior circumferential grooves on the female end with the plurality of rigid fingers extending from them typically corresponds to the number of exterior circumferential grooves on the male end. When the male end of a similar adjacent pipe is inserted into the female end of the pipe, the plurality of rigid fingers is received within the corresponding exterior circumferential groove on the male end, thereby preventing the male end of the similar adjacent pipe from being withdrawn from the female end of the pipe.

The invention provides modified talcum powder and a preparation method thereof. According to the technical scheme provided by the invention, a brucite component in the talcum powder can react with a pretreatment agent, so that Vander Wale force of the talcum powder is damaged; interlayer stripping is generated; meanwhile, the size of the talcum powder is decreased; through treatment of a coupling agent, the agglomeration of the talcum powder can be effectively avoided. Through the modified talcum powder obtained by the modification method, the phenomenon of agglomeration of the talcum powder can be avoided.

The invention provides a production method of a high-purity micro-powder silica plastic anti-block agent; high-purity water glass reacts with sulfuric acid to gain sodium sulfate and silicic acid; the sodium sulfate is washed by water to gain silicious colloid which is centrifugally dehydrated, and dried by micro-wave to gain pure SiO2 powder which is crushed by an airflow crusher to gain the high-purity micro-powder silica plastic anti-block agent. The production method of the high-purity micro-powder silica plastic anti-block agent has simple process, high purity and small particle size of the gained products, is suitable for the production and use of top-class plastic films, can obviously improve the top-grade product rate, reduces the cost of the product, improves the tensile yielding strength of the film to 13.5-14.5MPa generally, improves the tensile breaking elongation rate of the film to about 1400 percent, and obviously reduces the fish eye number of the film.

The invention relates to water solubility biodegradable material. The material contains the outcome formed by mixture fusing which contains starch, polyhydric alcohol, and aqueous polyvinyl alcohol which has hydrophilicity. Using the mixture total weight as the criterion, the content of the polyhydric alcohol is between 0.1wt% and 10wt%. Its fusing temperature is 140-190 degree centigrade; decomposition temperature is 250-400 degree centigrade. Thus it can realize squeezing granulation and injection molding. The formed water solubility biodegradable material has better simply supported beam impact strength, yield strength in tension, water solubility and biodegradability.

The invention relates to a polyethylene water supply pipe for trenchless construction. The pipe which is formed by blending and extrusion molding of a special high-density polyethylene pipe material and co-polypropylene mixture which are used as base materials, a glass fiber and a proper number of auxiliary agent comprises more than 70 percent of polyethylene, 10-20 percent of co-polypropylene, 5-15 percent of boron and alkali-free (E-CR) glass fiber, an antioxidant, an activating agent and a compatilizer. Compared with the traditional PE100 water supply polyethylene pipe, the polyethylene water supply pipe prepared by the raw materials through methods of high-speed kneading, mixed granulation and extrusion molding has higher ring stiffness and tensile strength, improves the ring stiffness by more than 25 percent and improves the tensile yield strength by more than 30 percent. The pipe disclosed by the invention can be prevented from being flattened or broken during trenchless construction, the dragging and ejecting length of the pipe is greatly reduced, the pipe cost is reduced and the construction cost is also reduced.

The invention provides a preparation method of doped nanoporous gold (NPG) with a small pore diameter and a large specific surface area. The preparation method comprises the following steps: 1, cleaning gold alloy foils thoroughly, and drying for standby application; 2, mixing lauryl sodium sulfate or sodium dodecyl benzene sulfonate (SDBS) with corrosive mineral acid uniformly to obtain a corrosive medium solution; 3, placing the gold alloy foils in the corrosive medium solution for dealloying treatment; 4, boiling, washing and soaking the gold alloy foils subjected to dealloying treatment by adopting absolute ethyl alcohol as a solvent, drying to obtain the doped nanoporous gold (NPG) with a small pore diameter and a large specific surface area. According to the preparation method of the doped nanoporous gold (NPG) with a small pore diameter and a large specific surface area, provided by the invention, nanoporous gold (NPG) with high toughness, a small pore diameter and a large specific surface area is prepared by adopting the surface active agent-induced electrochemical corrosion dealloying technology, therefore the advantages that the process is simple, the cost is quite low, the structure is easy to control and the toughness is higher are achieved.

The invention relates to a preparation method for a plastic raw material, especially a preparation method for a natural plant fiber plastic. The preparation method for a natural plant fiber plastic includes the first step by melting (by weight percentage) 59.5-69.5 base resin, 0.1-0.4 compatilizer, and 0.1-0.4 ageing resistance auxiliary agent, to obtain molten resin; the second step by adding 30-40% free-water-free hydrophobic modified bastose into the molten resin for performing blending; the third step by extruding via a short screw stem for granulation after the bastose is uniformly dispersed in the base resin. The plastic material obtained via the method has the advantages of high tensile yield strength, high bending strength, and high notch-free impact strength, and can be used in a plane, a steamship, an automobile, and other instruments. Relative to conventional loading strength material, plastic has lighter weight and can reduce whole weight of a transportation tool, with obvious effect.

The invention discloses an online two-way stretching device of plastic pipes. The online two-way stretching device comprises a die, a mandrel and a circular runner, wherein the die is arranged on an extrusion die, and the circular runner is arranged between the die and the mandrel. The online two-way stretching device is provided with a mold cavity connected with the die and a mold core connected with the mandrel. An expansion circular runner communicated with the circular runner and a horizontal circular runner communicated with the expansion circular runner are sequentially arranged between the mold cavity and the mold core, the mold core is provided with a cavity, a cyclone is arranged in the cavity, and an inlet pipe and an outlet pipe of the cyclone are connected with an external mold temperature controller respectively. The online two-way stretching device has the advantages that two-way stretching of pipes can be continuously realized online, impact resistance and stretching performance of the pipes are improved, and without high-pressure media, the online two-way stretching device is convenient to seal, simple in structure and safe and reliable to use.

The grain size of magnesium alloys is effectively refined and made smaller by the addition of a small amount of titanium. The effect of the reduction of grain size is often an improvement in the strength and processability of a cast magnesium alloy. Often less than about 0.1% by weight of titanium need be used. It may be preferred to incorporate the titanium with another alloying constituent (such as aluminum) for addition to a melt of a magnesium base alloy.

The invention discloses a toughening polypropylene material, comprising the following components in parts by weight: 100 parts of homo-polypropylene, 0.1-10 parts of polyethylene, 0.05-0.2 part of nucleating agent, 0.04-0.3 part of antioxygen, and 0.01-0.04 part of organic peroxide. The invention also discloses a preparation method of the toughening polypropylene material, and the preparation method includes the following steps: adding homo-polypropylene, polyethylene, a nucleating agent, an antioxygen and an organic peroxide into a high speed mixer for mixing, and conducting melting blendingextruding pelletizing on the uniformly mixed premix by a twin screw extruder, so as to obtain the final product. According to the invention, a low proportion of polyethylene is added into the formulacomponents and is used as a toughening agent of polypropylene, thereby realizing impact modification of polypropylene, refining grain size of polypropylene crystal, increasing impact resistance of thepolypropylene material, enhancing low-temperature resistance, and decreasing the melting point of the polypropylene material, decreasing the processing temperature and correspondingly reducing energyconsumption.

The invention discloses a steel belt self-locking type flange pipe connector used for connecting compound pipes and belongs to the technical field of the pipe connector. The steel belt self-locking type flange pipe connector comprises a shrinking sleeve, a flange 4, a sleeve liner, a steel belt and a filling layer, wherein the flange 4 is composed of an upper flange 5 and a lower flange 6; the shrinking sleeve is arranged between the steel belt and the sleeve liner; a ladder-shaped inner hole is formed on one side, which is close to a pipe body, of the lower flange 6; the sleeve liner is positioned in a hollow cavity; the steel belt is tangent with the outer side of the upper flange 5 and an end of the steel belt is matched with the inner wall of the inner hole, thereby forming the hollow cavity; the filling layer is positioned in the hollow cavity which is encircled by the steel belt, the upper flange 5 and the inner wall of the inner hole; the steel belt is positioned between the sleeve liner and the inner hole; an inclined angle of 30 degrees is formed between the slope of the ladder-shaped inner hole and the axial line of the pipe body. The steel belt self-locking type flange pipe connector can be used for reducing 10% of cost. The loading capacity is above dozens of MPa and the tensile yield strength is above 10MPa. The steel belt self-locking type flange pipe connector used for connecting compound pipes is capable of being used for efficiently promoting the tensile yield strength of the pipes and is reliable in connection and long in service life.

The invention relates to sorbitol derivatives and a preparing method and application of a DBS polyolefin nucleating agent synthesized with the sorbitol derivatives.The sorbitol derivatives include 1-(2-butenyl) sorbitol, 1-butyl sorbitol, 1-(2-methyl allyl)sorbitol, 1-isobutyl sorbitol, 1-vinyl sorbitol, 1-ethyl sorbitol and the like.The nucleating agent prepared from the series of novel sorbitol derivatives is odorless, and thus the odor issue of an existing nucleating agent is effectively relieved.The nucleating agent effectively increases the crystallization speed of polyolefin resin and improves the degree of crystallinity of polyolefin resin, the transparence and the surface gloss of polyolefin are improved, and the physical and chemical properties such as the bending modulus, the tensile yield strength, the heat deflection temperature and the impact strength of polyolefin are improved; in addition, the preparing method is simple in step, and industrialized production is easy to achieve.

The invention relates to a high-strength corrosion-resistant nickel-based polycrystalline high-temperature alloy and a preparation method thereof. The alloy comprises the following components of, in percentage by mass, 13%-17% of Cr, 15%-20% of Co, 0.1%-0.5% of Ti, 5.0%-5.5% of Al, 3.0%-7.0% of W, less than or equal to 0.5% of Si, less than or equal to 0.5% of Mn, 1.5%-2.0% of Nb, 0.04%-0.07% of Cand the balance Ni. Homogenizing treatment is conducted after smelting is conducted, hot rolling is conducted and finally heat treatment is conducted. The alloy has excellent strength and corrosion resistance, and the tensile yield strength of the alloy at a room temperature and 850 DEG C is higher than 900 MPa and 680 MPa respectively, and the alloy has excellent processing performance and structure stability at the same time.

The invention discloses a production method of 1-hexene copolymerized linear polyethylene resin. The method includes the steps of: (1) on a Unipol polyethylene process unit, taking ethylene, hydrogenand 1-hexene as the raw materials, using a Ziegler-Natta Ti based catalyst, carrying out reaction in a gas-phase fluidized bed reactor to obtain copolymer powder; and (2) adding an antioxidant and heat stabilizer into the copolymer powder obtained by step (1), conducting material granulation and drying, thus obtaining the 1-hexene copolymerized linear polyethylene resin. The 1-hexene copolymerizedlinear polyethylene resin prepared by the method provided by the invention has high quality stability, and greatly improved performance compared with the copolymers produced by the existing technology, especially higher melt flow index, tensile breaking strength, tensile elongation at break, tensile yield strength, tensile yield elongation and other data, and lower bending modulus, is very suitable for application to automobile fenders, and can effectively meet the ever-increasing performance requirements for polyethylene.

The invention discloses a method for inhibiting a sawtooth rheological phenomenon of nickel-based superalloy. The method includes the following steps: a heat treatment furnace is heated to a target solution treatment temperature, an Inconel 625 alloy sample is put into a hearth of the heat treatment furnace, the Inconel 625 alloy sample is immediately taken out of the heat treatment furnace after the solution treatment heat preservation time is reached, and the Inconel 625 alloy sample is quenched and cooled to the room temperature; the target solution treatment temperature is higher than the temperature of the MC type carbide precipitate of the Inconel 625 alloy, and the solution treatment heat preservation time is t1 = (d * 0.6 + 40) min-(d * 0.6 + 80) min; the Inconel 625 alloy sample obtained after solution treatment is put into the hearth, and then the temperature of the heat treatment furnace is increased to the target aging treatment temperature; after the aging treatment heat preservation time is reached, the Inconel 625 alloy sample is taken out, and quenched and cooled to the room temperature; and the target aging temperature is within the temperature interval of precipitating gamma ''-delta phases in the Inconel 625 alloy, and the aging treatment heat preservation time is 200-800 h. The method can effectively inhibit the sawtooth rheological phenomenon.

The invention discloses a high-performance degradable polypropylene composite material for a water horse. The high-performance degradable polypropylene composite material is prepared from the following raw materials in parts by weight: 80-120 parts of polypropylene, 1-2 parts of a nucleating agent, 3-5 parts of a plasticizer, 2-8 parts of glass fibers, 4-10 parts of wool fibers, 2-6 parts of coconut fibers, 1-6 parts of roasted kaolin, 2-4 parts of diatomite, 1-2 parts of tetrabutyl titanate, 1-2 parts of a stabilizer, 1-2 parts of a lubricating agent and 1-2 parts of an anti-ageing agent. Theplasticizer is prepared from the following components in parts by weight: 1-2 parts of castor oil compound, 1-2 parts of epoxy fatty acid methyl ester and 0.5-1 part of disproportionated rosin. The castor oil compound is prepared from the following process: mixing castor oil, hydrogen peroxide and formic acid, heating up and stirring, adding cocoalkanoylamido propyl betaine and a neutral phosphate buffer solution to uniformly stir, and adding soybean proteins to homogenize, thereby obtaining the caster oil compound.