139results about How to "Reduce orientation" patented technology

A magnetoresistive element has a magnetization pinned layer, a nonmagnetic spacer layer including a stack of a nonmagnetic metal layer, a resistance increasing layer and another nonmagnetic metal layer, a magnetization free layer having an fcc crystal structure, a cap layer having an fcc, an hcp, or a bcc crystal structure and having an interatomic distance between nearest neighbors greater than that of the magnetization free layer, and a pair of electrodes configured to provide a sense current in a direction substantially perpendicular to planes of the magnetization pinned layer, the nonmagnetic spacer layer, and the magnetization free layer.

The invention discloses a fibre-polymer compound toughened concrete and a preparation method for the same. The basic raw materials of the concrete are coarse aggregate, fine aggregate, portland cement, fly ash and a polycarboxylic water reducer; moreover, fibres and a polymer are added, the fibres are any one of end-hook type steel fibres, superfine type steel fibres, modified polyester fibres, polyvinyl alcohol fibres, basalt fibres and cellulose fibres, and are doped in a ratio that the volume doped amount in per 1 m<3> concrete is 0.08%; and the polymer is any one of ethylene-vinyl acetate copolymer, ethyl acrylate, styrene-acrylate copolymer, vinyl acetate-acrylate copolymer and organosilicone acrylate, and the doped amount of each polymer is 10% based on the mass of the portland cement and the fly ash. The preparation method comprises the following steps of: pouring stone, sand, a gelling material, fibres, and water dissolved with a water reducer, and then stirring according to a blending mode of pouring dry materials at first and then pouring wet materials; and pouring the polymer, and stirring and forming.

The invention relates to a manufacturing method for superlow shrinkage type PET industrial yarn, which is characterized in that the superlow shrinkage type PET industrial yarn is manufactured through selecting and controlling cooling conditions, and the technological process is as follows: hyperviscous melting to polyester raw materials, metering, spanning, cooling, oil supplying, stretching, hot shaping, and reeled forming. For lowing the irregularity and shrinkage percentage of fiber, a slow cooling device is arranged in the production of industrial yarn, a precooling device adopted is a hollow stepped ring-shaped belt comprising an upper part and a lower part, through holes with the diameters of 5 to 7 mm are uniformly distributed in the upper part of the ring-shaped belt, through holes with the diameters of 3 to 4 mm are uniformly distributed in the lower part, and the hole arrangement densities are the same. The natural target of the PET industrial yarn is as follows: the fracture strength is equal or greater than 7.0 cN/dtex, the breaking elongation is 20.0 plus or minus 1.5 percent, and the dry heat shrinkage percentage under the test conditions of 170 DEGC, 0.05cN/dtex reaches 1.9 plus or minus 0.25 percent.

The present invention relates to foam-paperboard laminates (foam-paperboard laminates) prepared using an in situ foaming process. The foam-paperboard laminates of the present invention are formed by extruding LDPE polymer onto a moisture containing paperboard to provide a LDPE-coated paperboard material. Upon heating of the LDPE-coated paperboard, the moisture in the paperboard causes steam to act as a blowing agent for the LDPE and a LDPE foam is obtained. The foam is adhered to the paperboard by way of physical adhesion of the polymer to the paperboard. The foam-paperboard laminates of the present invention exhibit insulating and cushioning properties. The foam-paperboard laminates are suitable for use, for example, in insulating beverage cups, food service containers, packaging material, and in other products where laminates can be useful.

Provided is a liquid crystal aligning agent that can increase adhesiveness between a sealing agent and a liquid crystal alignment film, and can suppress display anomalies that may occur under high temperature and high humidity conditions in liquid crystal display elements near the frame. The liquid crystal alignment agent contains a component (A), a component (B), and an organic solvent. Component (A): at least one polymer selected from the group consisting of a polyimide precursor having a structural unit represented by formula (1), and an imidized polymer of said polyimide precursor. Component (B): a compound having a hydroxyalkylamide group. (X1 independently represents a tetravalent organic group; Y1 represents a divalent organic group; R1 represents a hydrogen atom or a C1-5 alkyl group; and A1 and A2 independently represent a hydrogen atom, a C1-10 alkyl group, a C2-10 alkenyl group, or a C2-10 alkynyl group, and said groups may have a substituent.)

The invention discloses a high-rigidity low-warpage glass fiber reinforced polypropylene material comprising the raw materials in parts by weight: polypropylene, short-cut glass fiber, a glass fiber powder, an inorganic filling material, a compatibilizer, a flexibilizer and an antioxidant. The related high-rigidity low-warpage glass fiber reinforced polypropylene material is compared with a reinforced polypropylene material prepared by a traditional technology, in the material injection molding process, the glass fiber orientation is significantly reduced, and the post-contraction of a product is also reduced significantly in the use process; and in the reinforced polypropylene material prepared by the traditional technology, warping and deformation phenomena generated during injection molding of large long-flow pieces are obviously improved, and the product has the characteristics of high rigidity, high heat resistance, low warpage and the like.

The present invention provides a pneumatic tire by which workability when molding a tire and tire durability performance can be enhanced without increasing tire weight when providing a reinforcing layer formed by aligning a plurality of monofilament steel wires and embedding this plurality of monofilament steel wires in rubber. The pneumatic tire of the present invention includes a reinforcing layer formed by aligning a plurality of monofilament steel wires and embedding said monofilament steel wires in rubber. Each of the monofilament steel wires is provided with twisting around an axis thereof, and a wire surface twisting angle θ with respect to an axial direction of the monofilament steel wires is not less than 1°.

The invention discloses a preparation method for chopped fiber reinforced thermoplastic composite materials. The method comprises the following steps: compounding a phenolic aldehyde ethyl alcohol coating solution of which the concentration is 0.05-0.2g/ml; cleaning and treating the chopped fibers with acetone and drying the cleaned and treated chopped fibers to obtain dried chopped fibers; adding the phenolic aldehyde ethyl alcohol coating solution to the dried chopped fibers, compacting the dried chopped fibers, so that the compacted chopped fibers are completely soaked in the phenolic aldehyde ethyl alcohol coating solution, and soaking the compacted chopped fibers with discontinuous stir; drying the soaked chopped fibers at a room temperature to obtain the dried chopped fibers which are coated with phenolic resin; precuring the dried chopped fibers, and cooling and quickly stirring the precured and dried chopped fibers, so that chopped fiber bundles coated with the phenolic resin on the surface present a decentralized single bundle form; mixing the chopped fibers which present the decentralized single bundle form and a thermoplastic polymer, and then melting and extruding pelleting to obtain the chopped fiber reinforced thermoplastic composite materials. The method has the advantages that the equipment used is simple, the operation is convenient, the energy consumption is low, and the expense is low; the bonding strength of fibers and thermoplastic plastic interface is high, and the coating effect of the phenolic resin to the fibers is good.

The invention discloses a built-in suspended track beam and a built-in suspended air-rail transportation system, and relates to the field of rail transportation. The inside of the track beam is used for the running wheels on both sides of the suspended monorail vehicle, and it includes a running track. The running track includes a top plate, two side plates and two walking plates for the running wheels to slide, and the two side plates are arranged opposite to each other. , the two ends of the top plate are respectively fixedly connected with one end of the two side plates, the other ends of the two side plates are respectively fixedly connected with one end of the corresponding running board, and there is a space between the free ends of the two running boards for suspending the carriage The gap through which the suspension frame passes; the top surfaces of the two walking boards form a walking part, the top surface of the walking part is an inclined plane, and the traveling wheels run on the inclined plane. The invention has simple structure, self-guiding and self-stabilizing functions, effectively solves the problem of lateral movement of the car body due to the influence of external force, improves stability and safety, reduces cost, reduces noise and protects the environment.

The invention provides a preparation method of silane coupling agent modified diabase permeable concrete. The method comprises the following steps: silane coupling agent modified diabase as aggregateis uniformly mixed with cement and a water reducing agent, molding and demolding are performed, and the silane coupling agent modified diabase permeable concrete is obtained. Mechanical properties ofpermeable concrete are obviously improved by SCA modified diabase aggregate, and permeability is decreased to a certain extent. The smaller the particle size of aggregate is, the higher the increase amplitude of strength of the SCA modified aggregate permeable concrete specimen is, and the better the modification effect is; the larger the particle size is, the higher the porosity of the SCA modified aggregate specimen is and the higher the permeability coefficient is. According to comprehensive consideration of requirements of maximum practical economy and ecological benefit of engineering, anSCA solution with concentration of 1% is more appropriate for pretreatment.

The invention discloses a manufacturing method of a superconducting magnet for a high-temperature superconducting maglev train. The manufacturing method comprises the steps of A. coating the surface of a high-temperature superconducting strip (1) with a curing agent; winding the high-temperature superconducting strip (1) from inside to outside during coating to form a hollow circular ring shape or solid round cake, and enabling the inner end (1a) of the strip (1) to be exposed; B. connecting the inner end (1a) of the high-temperature superconducting strip (1) and the outer end (1b) of the high-temperature superconducting strip (1) to form a superconducting joint (2), and forming a closed blocky superconducting ring or superconducting cake. The superconducting magnet manufactured by the method is high in critical current density, and magnetic force lines concentrated in an area above a magnetic track can enter the superconducting magnet in a dense and concentrated way so as to be subjected to concentrated pinning, so that the superconducting magnet can produce strong suspension force and guide force.

The invention relates to a glass fiber reinforced polypropylene material used for thin-wall injection molding. The glass fiber reinforced polypropylene material comprises the following components (inpercentages by mass): 41-47% of polypropylene resin, 4.5-8% of an amorphous polyolefin, 18-22% of modified glass fibers, 12.5-16.2% of a polyolefin elastomer, 7.7-11% of ternary copolymer polypropylene, 4-6% of styrene-butadiene transparent impact-resistant resin, 0.1-0.5% of a main antioxidant, and 0.3-0.8% of an auxiliary antioxidant, wherein the cross section of the glass fibers is elliptical.At the same time, the invention also relates to a method of preparing the material. The surface of a component prepared from the material provided by the invention has no floating fibers, low warpage,no gas mark and no tiger skin stripes, and the component has good mechanical properties; at the same time, the elliptical cross section of the glass fibers reduces orientation of the glass fibers andreduces anisotropy of the glass fibers, so that the problem of warpage deformation of the glass fiber reinforced polypropylene material is improved, and the mechanical properties of the material areimproved; and the glass fibers have better compatibility with the polypropylene material after being modified by hydrofluoric acid, the glass fibers and the polypropylene material are more tightly combined, so that the mechanical properties of the prepared finished product are improved.

The invention discloses a carbon fiber reinforced resin composite material, use thereof and a preparation method of a rubber frame of an electronic equipment enclosure and/or a module, and relates to the technical field of carbon fiber reinforced resin composite materials. A product injection-molded by the carbon fiber reinforced resin composite material can not only meet the requirements of high rigidity and high dimensional stability, but also obtain high-light spraying-free effects. The carbon fiber reinforced resin composite material is prepared from the following components: 15-25wt% of carbon fibers, 50-70wt% of PC+ABS alloy, 10-20wt% of a smoothing agent, 2-4wt% of a flexibilizer and 0.3-0.5wt% of an antioxidant, wherein the melt index of the PC+ABS alloy is greater than and equal to 40. The carbon fiber reinforced resin composite material disclosed by the invention is applicable to the injection molding of thin-wall products.

The invention belongs to the technical field of fiber reinforced thermoplastic composite materials, and particularly relates to a preparation method for a graphene oxide treated hybrid chopped fiber reinforced polyether sulfone composite material. The preparation method specifically comprises the following steps: blending, washing and drying fiberglass and carbon fibers; preparing an aqueous solution of graphene oxide at a certain concentration; adding the aqueous solution of graphene oxide into the hybrid fibers; drying the hybrid fibers treated with graphene oxide in a drying oven to remove water; mixing the treated hybrid short fibers and polyether sulfone particles, and performing melting, extrusion and granulation to prepare the hybrid chopped fiber reinforced polyether sulfone composite material. According to the method, the bonding strength of an interface of the fibers of the prepared composite material and polyether sulfone resin is strong, equipment adopted for a preparation process is simple, convenient to operate and low in energy consumption and cost, and the composite material has excellent mechanical performance and strength designability.