337results about How to "High specific modulus" patented technology

The invention belongs to the technical field of building decoration and transportation, and discloses a light-weight and high-strength plastic steel sandwich board and its making method. The plastic steel sandwich board comprises two panels and a sandwich layer fixed between the two panels. The making method of the plastic steel sandwich board comprises the following steps: placing the sandwich layer between the two panels, and respectively bonding the two panels with the right and wrong surfaces of the sandwich layer through an adhesive to prepare the plastic steel sandwich board, wherein each of the panel is obtained through compounding one side of a continuous fiber reinforced thermoplastic plastic board with a non-woven fabric through hot-press molding. The plastic steel sandwich board has the advantages of light weight, high strength, heat insulation, fire resistance, moisture resistance, corrosion resistance and the like.

The invention relates to aramid fiber enhanced wood-plastic composite material and a preparation method thereof, relating to fiber enhanced wood-plastic composite material and the preparation method thereof. The invention solves the problem that the existing wood-plastic composite material has bad comprehensive mechanical property. The wood-plastic composite material comprises thermoplastic, wood fiber material, lubricant, bulking agent and graft modification aramid fiber. The preparation method of the invention is as follows: 1. weighing raw materials; 2. preparing premixing materials; 3. melting, extruding and molding the premixing materials to obtain the fiber enhanced wood-plastic composite material. The preparation method utilizes carbon-carbon double bond and silane alkyl on the surface of modified aramid fiber and polyolefin and wood flour to form chemical bonds so that aramid fiber and polyolefin has good compatibility, and effectively enhances the interface binding force of the composite materials; the aramid fiber enhanced wood-plastic composite material simultaneously has high strength, high tenacity, and good comprehensive mechanical property. The method can be used for producing the wood-plastic composite material with high performances such as structural engineering materials, etc.

The invention relates to a light-weight and high-strength thermoplastic composite material sandwich board and a production method thereof. The light-weight and high-strength thermoplastic composite material sandwich board comprises two panels and a sandwich layer, wherein the sandwich layer is fixedly arranged between the two panels. The preparation method comprises the following steps: putting the sandwich layer between the two panels; and sticking the two panels on the front and rear faces of the sandwich layer by a thermoplastic glue film through a hot pressing process and a cold pressing process to produce the thermoplastic composite material sandwich board. The panels are continuous fiber enhanced thermoplastic composite material boards and the sandwich layer is made of a honeycomb aluminum material. Compared with the prior art, the thermoplastic composite material sandwich board has the advantages of light weight, high strength, heat preservation, fireproof prevention, moisture prevention, corrosion prevention and the like.

A manufacturing method of a carbon fiber metal composite laminated plate relates to a manufacturing method of a fiber metal composite laminated plate. The method aims at solving the problems that no manufacturing methods for manufacturing aircraft structural material with high specific stiffness, high specific strength, tenacity and workability exist in China. The method comprises the following steps of: carrying out surface treatment to three pieces of metal plates; winding a carbon fiber composite material layer which is soaked in liquid cement on one of the metal plates, wherein, the liquid cement is prepared by epoxy resin, a metaphenylene diamine curing agent and an anhydrous alcohol solvent according to the mass ratio of 1:0.1 to 0.18:0.15 to 0.2; fixedly arranging another two metal plates on the upper surface and the lower surface of the carbon fiber composite material layer so as to be integrally put into a mould, and then treated with mould assembling, drying, solidification by adopting the method of gradient temperature increasing, and demoulding. The manufacturing method of the invention is simple and is easy for operation. The carbon fiber metal composite laminated plate manufactured by the method of the invention has the advantages of high specific stiffness, high specific strength, also high tenacity and workability of metal material, good fatigue property, and good damage tolerance capability.

The invention provides a hot press molding device for a carbon fiber enhanced polyether-ether-ketone (PEEK) composite board. The hot press molding device comprises a hydraulic machine, a molding die and a vacuum system. According to the device, a heating unit is separated from the hydraulic machine, and a heating pipe is used for heating the die to achieve a high temperature hot pressing function; by carrying out hot press molding in a vacuum environment, the content of bubbles in resin can be greatly reduced, and the test piece surface smoothness and workpiece performances are improved; a cooling unit is arranged in the die, and cooling speed is regulated by regulating the flow and temperature of high pressure cold air, so as to control the crystallinity of matrix resin and realize flexible selection between high strength and high toughness. Correspondingly, the invention also provides a hot press molding method for the carbon fiber enhanced polyether-ether-ketone (PEEK) composite board. A carbon fiber enhanced polyether-ether-ketone (PEEK) composite board produced by adopting the device and the method disclosed by the invention through hot press molding is simple in production equipment and solves the problems that material internal porosity is large, resin impregnation fiber is insufficient, test piece performance is insufficient, molding cycle is long and the like during production of polyether-ether-ketone resin with high melting point and high viscosity.

The invention belongs to the field of textile machinery, in particular to a novel 3D loom capable of producing 3D textile composite material skeleton. The novel 3D loom comprises a frame and a transmission portion, and is characterized in that the loom also includes a 3D woven fabric winding mechanism arranged on the front end of the frame, a multilayer warp let-off mechanism arranged on the tailend of the frame, and a Y-direction opening, a Z-direction weft inserting mechanism, a Z-direction opening and a Y-direction weft inserting mechanism, which are sequentially arranged between the winding mechanism and the let-off mechanism. The 3D loom has the advantages that (1) the loom can weave completely and has good stability, the woven fabrics have various structures, and the produced textile composite material has excellent performance; (2) four different fabrics can be woven; (3) the integrity of the fabric can be ensured; (4) the pitch between yarns can be better controlled to combine with the looseness of the 3D woven fabrics, and the loom obviates the need of a beating up mechanism; and (5) the loom has simple structure and operation and convenient maintenance by fully utilizing electromechanical integration technology.

The invention belongs to the technical field of composite material preparation, and relates to a preparation method of a para-aramid paper honeycomb core. The preparation method of the para-aramid paper honeycomb core is used for preparing a sandwich-structure composite material, and comprises the four treatment process steps of sequentially gluing and pressing para-aramid paper, stretching and setting the para-aramid paper, glue dipping and solidifying the para-aramid paper, and slicing processing the para-aramid paper. A para-aramid paper honeycomb prepared through the preparation method provided by the invention has higher specific strength and specific modulus, and a more excellent heat-resisting property; and under the same design requirement, the weight of a composite material component can be further reduced. The para-aramid paper honeycomb core prepared by adopting the method provided by the invention has higher strength and modulus, under the same mechanical property design requirement, the weight of the high-performance para-aramid paper honeycomb is reduced greatly, and the para-aramid paper honeycomb core can be widely applied in high-end fields such as aerospace.

The invention discloses a preparation method of a polyurethane pervaporation phenol/water separating membrane compounded by inorganic particles, and belongs to the field of pervaporation membrane separation. The polyurethane membrane basic material is obtained by polymerizing and mixing monomer hydroxyl-terminated polybutadiene, toluene diisocynate, 4,4'-diamine diphenylmethane solution, cyclodextrin and silica or carbon fiber powder. The preparation method comprises the following steps: reacting hydroxyl-terminated polybutadiene with toluene diisocynate to obtain blocked prepolymer, then adding 4,4'-diamine diphenylmethane solution and cyclodextrin as chain extenders to perform the chain extension, and adding inorganic modified particle silica or carbon fiber powder (using N,N-dimethylacetamide as solvent) to obtain prepolymer solution of polyurethane; casting the solution on a polyfluortetraethylene plate to form a membrane, solidifying for 1-1.5 hours at room temperature, and moving the membrane to an oven at 80 DEG C to thermally treat to obtain the polyurethane membrane compounded by inorganic particles. The preparation method disclosed by the invention is simple in process, and the prepared membrane has good heat and chemical stability and mechanical property.

The invention discloses a high-performance jute fiber reinforced polypropylene composite and a prepration method thereof. The high-performance jute fiber reinforced polypropylene composite comprises the following raw materials of, by weight, 20-60 parts of jute fibers, 30-80 parts of polypropylene, 1-10 parts of a compatilizer, 0.5-2 parts of a coupling agent, 0.1-1 part of antioxidants, and 0.2-1 part of lubricants. The polypropylene composite used for vehicles is prepared by adoption of the jute fibers which are low in price, rich in source, high in specific modulus, low in density and small in effect on the environment, the production cost can be lowered, and the composite accords with the development trend of low-weight, environment-friendly and recyclable automobiles; and meanwhile, the natural fibers are treated by adoption of an alkaline solution, the coupling agent and the compatilizer, the hygroscopicity of the jute fibers is reduced, and the bonding force between the jute fibers and polypropylene particles is increased at the same time.

The present invention adopts the sisal hemp fiber as fiber raw material, and uses the nonwoven fabric of thermoplastic resin PP, film, powder material and its fiber as resin base body, and adopts thefollowing steps: pretreating sisal hemp fiber and making it into fiber felt, hot-pressing and forming, selecting and using a certain number of fiber felts, delaminating and sand wiching pp nonwoven fabric or film, under the condition of a certain temp. and pressure hot-pressing and forming or mixing PP fiber (PP powder) directly with sisal hemp fibre, making them into fiber felt and then hot-pressing and forming so as to obtain the invented sisal hemp fiber reinforced polypropylene composite material.

The invention relates to a preparation method of an electret polylactic acid meltblown nonwoven material, and belongs to the technical field of textile materials. According to the method, an inorganicelectret material nano silicon nitride and a polymer polytetrafluoroethylene are compounded to serve as a filler by means of a mechanical dispersion method, the charge storage capacity of the compound material can be effectively improved under a high-temperature or humid environment, the occurrence of an electret agglomeration phenomenon is avoided, and the service life of the product is prolonged; the compound filler and polylactic acid are meltblown and then subjected to treatment such as opening, impurity removal, combing, lapping, pre-needling, spunlacing and hot rolling, and the nonwovenmaterial is prepared. The method has the advantages that the inorganic electret material nano silicon nitride and the polymer polytetrafluoroethylene are compounded to serve as the filler by means ofthe mechanical dispersion method, and the charge storage capacity of the compound material can be effectively improved under the high-temperature or humid environment; the electret filler and the polylactic acid are compounded, so that the electrostatic potential of the surface of the polylactic acid nonwoven material is increased, and the charge storage capacity is improved.

The invention relates to a net-size preparation method of a three-dimensional woven pyramid sleeve, which comprises the steps of: arranging yarns into a square shape on a chassis of a weaving machine, and on the basis of the four-step square three-dimensional weaving process, weaving a cross beam part and a longitudinal beam part of the pyramid sleeve respectively; and the net-size preparation method is characterized in that the yarns are moved and reduced for at least once in the weaving process to obtain an equal-wall-thickness three-dimensional pyramid sleeve. The net-size preparation method of the three-dimensional woven pyramid sleeve can realize net-size forming of the pyramid sleeve, and reduce the working procedures; and the prepared products have higher specific strength, fatigue resistance and impact damage tolerance, and can totally avoid damage to the sleeve layer by layer.

The invention relates to a glass steel stabilizer. Wherein, two glass steel fixing rings (2) are individually mounted on two ends of 4-12 glass steel arc bars (1). The producing method comprises: making the arc back of said glass steel arc bars (1) outward to be distantly radial fixed on the surface of mould; coiling the continuous glass fiber immerged with thermosetting resin on two ends of glass steel arc bars (1), to be solidified to fix the bars (1) and the fixing rings (2), or directly fixing the glass steel stabilizer on the glass steel tube or glass steel oil tube via said method. The invention has lower weight, simple process and lower cost.

A preparation method of a carbon fiber and fiberglass-combined reinforced composite relates to the field of a composite technology. The preparation method comprises the following steps: a, blending of base materials: weighing 1-15 wt% of carbon fiber, 45-70 wt% of fiberglass and 30-45 wt% of resin according to the weight ratio and uniformly mixing; b, preparation of a prepreg; c, spraying of a mold release agent for a mold; d, laying of the prepreg; and e, compression molding; and f, demolding. The prepared composite has light weight, high specific strength, high specific modulus, fatigue resistance, corrosion resistance, high temperature resistance and good dimensional stability, and has high cost performance. In addition, the method has few processes, is simple to operate, has high market promotion and application value, and can be used to significantly reduce weight of pure fiberglass reinforced composite parts and greatly enhance carrying capacity of aeronautics and astronautics devices.

The invention discloses an impact-resistant and high-energy-absorption lattice sandwich structure with a negative poisson ratio characteristic. The lattice sandwich structure is formed on the basis ofa high-performance negative poisson ratio lattice core material. The negative poisson ratio lattice core material is obtained by changing an included angle between a supporting column and a coordinate axis through a three-dimensional cubic structure. When the included angle between the supporting column and the coordinate axis is not equal to zero, the negative poisson ratio lattice core materialis obtained. The negative poisson ratio lattice material and two thin plates form a novel negative poisson ratio lattice sandwich structure, and the structure has the characteristics of a traditionalauxetic lattice structure and a traditional lattice sandwich structure at the same time, that is, the structure has the characteristics of the negative poisson ratio and the same-direction curvature;meanwhile, has excellent mechanical properties such as ultra-light weight, high specific modulus, high specific strength, impact resistance and high energy absorption. In addition, the sandwich structure has high adjustability, and the mechanical property of the lattice sandwich structure can be adjusted and controlled within a large range by adjusting the deflection angle of the supporting column and the relative density of the lattice material. The lattice sandwich structure has a great application prospect in the field of aerospace.