40results about How to "Overcome the defect of easy shedding" patented technology

The invention discloses a long-carbon-fiber-reinforced nylon composite material with electromagnetic shielding function and a preparation method thereof. The composite material is composed of the following components in percentage by mass: 40-80 wt.% of nylon resin, 20-45 wt.% of long carbon fiber, 2-8 wt.% of alloy powder, 2-10 wt.% of maleic anhydride grafted low-density polyethylene (LDPE-g-MAH) and 0.1-2 wt.% of antioxidant. The preparation method of the composite material comprises the following steps: proportionally and uniformly mixing the nylon, alloy powder, LDPE-g-MAH and antioxidant, carrying came out melt blending on a double screw extruder, and directly extruding the melt into a dipping mold; sending the fiber bundle subjected to surface treatment into the cavity of the dipping mold under the action of tension to sufficiently dip the melt; and pulling the dipped fiber bundle out of the mold, cooling, and granulating to obtain the strip-shaped granules of which the length is 10+/-0.2mm. The composite material disclosed by the invention has the specific function of shielding high/low-frequency electromagnetic waves, and has excellent mechanical properties which are peculiar to long-fiber-reinforced plastics.

The invention relates to the field of engineering plastic, in particular to a preparation method for a high-strength MC (monomer casting) nylon wheel for elevator transmission. The preparation method comprises the steps as follows: heating, dehydrating, pouring, forming and processing in sequence to prepare the high-strength MC nylon wheel which overcomes the shortage of nylon wheels prepared by the existing preparation method, is better in flexibility and wear resistance, lighter in self weight and easy to mount, is prolonged in service life and is provided with a wheel groove for protecting a steel wire rope.

The invention discloses a hydrophobic-material-coated environment-friendly coated slow release fertilizer and a preparation method thereof. The hydrophobic-material-coated environment-friendly coated slow release fertilizer is prepared from the following raw materials in parts by weight: 8-15 parts of carboxymethylcellulose, 10-20 parts of acrylic acid, 20-30 parts of a sodium alginate solution, 5-10 parts of hydroxyethyl cellulose, 1-2 parts of ammonium persulfate, 3-6 parts of N,N-methylene bisacrylamide, 1-2 parts of citric acid, 15-25 parts of polyvinyl alcohol, 3-5 parts of starch, 25-35 parts of urea, 8-15 parts of potassium hydrogen phosphate and 50-100 parts of distilled water. A water-retaining agent is added into crosslinking liquid to obtain a mixture, and the mixture is sprayed to a core of the fertilizer, so that the defect that the water-retaining agent is easy to fall after being directly adhered to the core of the fertilizer is overcome, and the water-retaining effect of the fertilizer is remarkable; meanwhile, the crosslinking liquid has the effect of improving the water resistance of the fertilizer; and by utilizing a hydrophobic coated material as a coat of an inner layer of the fertilizer, a relatively good slow release effect is achieved.

The invention relates to the technical field of road reticule coatings, in particular to a multi-component spray reticule coating as well as a preparation method and application thereof. The coating is prepared from a component A, a component B and a solid particle material C, wherein the component A is prepared from epoxy resin, hydroxyl-terminated polybutadiene liquid rubber, adipic acid, 2,6-methyl diisocyanate, 1,6-hexamethylene diisocyanate, stannous octoate, polycaprolactone polyol, dichloromethane, urea resin, lithium silicate and a film forming additive; the component B is prepared from self-crosslinked elastoacrylate emulsion, polydimethylsiloxane, diethylenetriamine and dichloromethane; the component C is prepared from nanosilicon dioxide, calcium carbonate, talcum powder, pigment and modified glass micro beads. A reticule formed by the coating is high in binding force with a pavement, is not easy to crack and fade, and has extremely high self-cleaning antifouling property. Furthermore, the surfaces of the modified glass micro beads in the coating are grafted with coupling agents and film forming agents, so that the shortcoming that a conventional luminous glass micro bead is easy to fall off is overcome.

The invention provides a titanium-based nickel buckle stripper, which comprises a titanium substrate, wherein the titanium substrate is uniformly provided with through holes; conductive poles are fixed in the through holes, and extend to two sides of the titanium substrate in an equal length mode; two ends of the conductive poles are fixed with growth poles; and an insulating layer is coated on the surface of the titanium substrate. By changing the fixed connection mode of the growth poles on the titanium substrate and the attachment mode of the rubber insulating layer, the connection reliability of the titanium substrate and the growth poles is improved and the service life of the stripper is prolonged.

The invention discloses a method for preparing a cobalt hydroxide/nickel hydroxide supercapacitor electrode based on a metal titanium mesh substrate with a high-conductivity ceramic surface film. According to the method, a metal titanium mesh is subjected to reduction treatment to generate a conductive titanium black film layer on the surface of the metal titanium mesh so as to obtain the metal titanium mesh substrate with the conductive titanium black surface film; and nanometer nickel hydroxide or nanometer cobalt hydroxide is deposited on the surface of the metal titanium mesh substrate with the conductive titanium black surface film through a constant current negative electrode electrodeposition method to obtain the cobalt hydroxide/nickel hydroxide supercapacitor electrode. The preparation is simple to operate and the cost is low, and the cobalt hydroxide or the nickel hydroxide active material and the metal titanium mesh current collector are tightly combined in the prepared electrode; the active materials are uniform in distribution; in addition, the electrode has a multiple nano-structured morphology; and the electrochemical performance is obviously better than that of nickel hydroxide or cobalt hydroxide deposited on other substrate.

The invention provides finishing paint for a button, colored finishing paint for the button and a preparation method of the button. The finishing paint for the button, provided by the invention, comprises 50-65% of polyester acrylic resin, 3-4.6% of a photosensitizer, 0.3-0.7% of a leveling agent, 0.1-0.3% of a defoaming agent and30-45% of a solvent. Through collocation of the various components according to a specific ratio, the fastness of a film layer of the button can be remarkably improved, the water washing resistance, the dry washing resistance and the ironing resistance of the button can be improved, and the defect that the film layer of a metal colored button easily drops off is overcome.

The invention discloses a plastic product molded by injection using double-color mould, which comprises a one-step shaping part and a two-step shaping part, and the plastic product is characterized in that a plurality of tooth-shaped claspers are provided on the joint position of the one-step shaping part and the two-step shaping part, an groove embedded with the tooth-shaped claspers is providedat the circumference of the one-step shaping part, the tooth-shaped claspers are embedded in the groove. According to the invention, a structure of intersecting and locking of the one-step shaping part and the two-step shaping part of the double-color plastic products can be fixed, the disadvantages of the unstable stickiness and easy shedding of two-step shaping part of double-color plastic products in the prior art are overcome by the invention, and the invention has the advantages of simple structure, easy production of injection mould and convenient enforcement.

The invention relates to the field of immobilized cultivation, and particularly relates to an immobilized cultivation device, a harvesting device and an immobilized cultivation method. The nutrient solution is supplied evenly, cell detachment is reduced and the cultivation yield is increased. The defects of the prior art that the nutrient solution is supplied directly to flush the cultivation surface and easily cause the cell detachment and the nutrient solution is unevenly supplied through the nutrient solution supply mode can be overcome. The immobilized cultivation device comprises a storage device and a cultivation device, wherein the storage device is used for providing microalgae nutrient solution; the cultivation device comprises at least one hollow tubular body, the outer surface of the hollow tubular body is a microalgae immobilized cultivation surface, the hollow tubular body is communicated with the storage device, pores are formed in the hollow tubular body, and nutrient solution flowing through the interior of the hollow tubular body is penetrated through the immobilized cultivation surface through the pores.

The invention discloses an environment-friendly coated slow release fertilizer preventing pest and disease damage and a preparation method thereof. The environment-friendly coated slow release fertilizer is characterized by being prepared from the following raw materials in parts by weight: 0.5-1.5 parts of diallyl disulfide, 10-20 parts of acrylic acid, 30-50 parts of sodium alginate solution, 3-5 parts of donkey bone powder, 1-2 parts of ammonium persulfate, 3-6 parts of N,N-methylene bisacrylamide, 0.5-1 part of diallyl trisulfide, 15-25 parts of polyvinyl alcohol, 3-5 parts of starch, 25-35 parts of urea, 8-15 parts of potassium hydrogen phosphate, 40-50 parts of calcium chloride solution and 50-100 parts of distilled water. In the invention, by adding a water retaining agent into crosslinking liquid and spraying on the fertilizer core, the defect that a water retaining agent easily falls when the water retaining agent is directly adhered to the fertilizer core is overcome, and the water retaining effect of the fertilizer is remarkable; meanwhile, the crosslinking liquid also can realize an aim of enhancing the water resistance of the fertilizer and is easily biodegradable; and through the compounding of the raw materials, the pest and disease damage of crops can be effectively prevented, and the soil is purified.

The invention discloses an assembly type tool hoe; head part of a tool hoe comprises a hoe piece, a fixing splint, a fastening pressing piece and a hoe beam; the hoe beam is an L-shaped structure, and the fixing splint is a U-shaped structure; the middle rear part of the splint at the bottom part is provided with a fastening pressing piece; one end of the fastening pressing piece is connected with the splint to be one body, and the other end is a split plate which is cut off and upwards warped; the hoe piece is a trapezoid flaky structure, and the fastening pressing piece is placed above the toe piece; an opening is buckled with the fastening pressing piece together; the other end of the toe beam is fixedly connected with a small diameter section of a taper pipe trouser; the inner part of the taper pipe trouser is plugged with a wooden core matched with its shape; one end of a rod part sleeves on the wooden core and is connected and fixed with the wooden core by a connector. According to the assembly type tool hoe, every part is formed by independently processing; every part is a general piece and assembled to be an integral hoe in the later period, thus the service life of the tool is prolonged; the assembling process is simple; the assembly type tool saves resource, keeps high intensity and reduces the occupied space and also improves the working efficiency and economic benefit.

The invention discloses a device and a method for measuring a refractive index of a high-refractive index glass microsphere. A camera 11 is arranged on a lifting device; a receiving screen 10 is arranged below the camera 11; a reader 13 is arranged on a mobile station of the lifting device and is used for reading distance from a glass microsphere 9 to the receiving screen 10; an objective table for accommodating a glass slide 8 is arranged below the receiving screen 10; the objective table is arranged on a movable platform of an X/Y translation structure 7; and emergent light of a laser 1 passes through an aperture on the objective table upwards to irradiate the glass microsphere 9 through a lens 3 and a diaphragm 5, a secondary rainbow image is formed on the receiving screen 10, the radius of the secondary rainbow image is measured, and the refractive index of the high-refractive index glass microsphere is calculated according to the distance from the glass microsphere 9 to the receiving screen 10 and the radius.

The invention belongs to the field of marking of arc-shaped surfaces and particularly discloses a guide sleeve for marking the arc-shaped surface of a bar. The guide sleeve comprises a cuboid guide sleeve body, wherein a plurality of guide holes are formed in the cuboid guide sleeve body in the axial direction of the cuboid guide sleeve body; an elastic seat is arranged at the bottom of the cuboid guide sleeve body; auxiliary holes communicating with the guide holes are formed in the elastic seat; and the auxiliary holes and the guide holes are coaxial. The guide sleeve can be used for marking the arc-shaped surface of the bar with dots conveniently.

The invention discloses a preparation method of a super-hydrophobic magnesium alloy. The preparation method specifically comprises the steps that laser marking is carried out on an original magnesium alloy matrix subjected to surface pretreatment to obtain a marked magnesium alloy matrix, specifically, the marked magnesium alloy matrix has a convex hull-shaped micron structure; ultrasonic cleaning and drying are carried out on the marked magnesium alloy matrix; at the room temperature, a cobalt metal plate serving as an anode and the marked magnesium alloy matrix serving as a cathode are immersed into a Co2+ electroplating solution for depositing to obtain a to-be-modified magnesium alloy matrix, specifically, the to-be-modified magnesium alloy matrix with the convex hull-shaped micron structure reserved further has a multi-stage a cicular micro-nano-scale structure; chemical modification is carried out on the to-be-modified magnesium alloy matrix; and the super-hydrophobic magnesium alloy matrix is of a graded rough structure in which the convex hull-shaped micron structure and the a cicular nano structure are reserved. According to the preparation method of the super-hydrophobic magnesium alloy, the stable super-hydrophobic magnesium alloy surface is prepared, test parameters are controllable, the preparation process is environmentally friendly, and wide application prospects are achieved.

The invention provides a chip module, an intelligent angle valve and an intelligent steel cylinder. The chip module comprises a module frame, a chip and a fixing device, wherein the module frame comprises an inner side structure and a chip positioning device; the inner side structure fits a left side part or right side part structure of a vertical part of a valve body at an air outlet of the anglevalve; the chip positioning device is used for storing the chip and positioning the chip; the chip is an RFID chip and is used for storing information, and a reading device can read the information stored in the chip; the fixing device is arranged on the module frame in a fitting manner; the chip module is fixed to the left side or right side part of the vertical part of the valve body at the airoutlet of the angle valve. The intelligent angle valve comprises a valve body, and the abovementioned chip module which is mounted on the valve body. The intelligent steel cylinder comprises a cylinder body, and the abovementioned intelligent angle steel which is connected to an end port of the cylinder boy. According to the chip module, the fixing device is provided and is safe and reliable to fix, so that the chip is protected, and the safety is high; the chip positioning device is simple to mount, and reliable to position; the chip module is simple in structure, and low in manufacturing cost, and is applicable to intelligent reconstruction of the steel cylinder.

The invention discloses an energy-saving jet blower, which comprises a jet pipe, a nozzle, a swing body, a connection part, and a water guide support, wherein the nozzle is molded integrally, the inner passage of the nozzle is divided into a smooth segment, a convergence segment and an expansion segment in order, the outer shell of the smooth segment is provided with a flange, an external thread is arranged at the inlet end from the flange to the nozzle; the outer shell of the convergence segment is provided with a support, the grip end of the support is connected with the jet pipe; the right end of the swing body is connected with the connection part, the other end of the connection part is connected with the thread of the outer shell of the smooth segment of the nozzle. The external configurations of the nozzle and the jet pipe can be designed according to the output flow, flow speed and pressure, the energy conversion of working fluid is utilized to pump the jet fluid, thereby reaching the purpose of turbid water activation of blowing and mixing circulation water tank bottom.