17results about How to "Reduce melt viscosity" patented technology

This utility model discloses an injection mold for manufacturing control panel housings, relating to the field of control panel housing manufacturing technology. The utility model includes a mounting frame providing installation and stable support for the device, a vibration mechanism housed within the mounting frame, and a demolding mechanism for vibrating the mold during injection molding. Specifically, the vibration mechanism involves a motor driving the front rotating shaft to rotate, while a pulley system simultaneously drives the rear rotating shaft to rotate synchronously. Two impact wheels jointly strike the bottom of the lower mold, causing it to vibrate. During vibration, the lower mold, through the mounting plate, compresses the damping rod and spring, which work together to buffer the vibration and reduce violent shaking. This vibration mechanism reduces the viscosity of the molten plastic, promotes uniform filling of the cavity, assists demolding, simplifies the mold structure, and reduces cost and maintenance difficulty.

The invention discloses a polypropylene film suitable for a film lamination method and a preparation method of the polypropylene film. The polypropylene film comprises the following components in parts by weight: 85.6-91.85 parts of polypropylene; 4-7 parts of long-chain branched polypropylene; 4-7 parts of a compatibilizer; 0.05 to 0.1 part of a nucleating agent; and 0.1 to 0.3 part of an antioxidant. Firstly, polypropylene is selected, so that the wettability of a melt to carbon fibers is effectively improved, and the filling defect caused by high viscosity of a traditional material is overcome; and secondly, the compatibilizer is introduced to form firm chemical bonding with the fiber surface, so that the interface bonding strength is greatly enhanced. And finally, by combining a precise extrusion and casting process, the prepared polypropylene film is uniform in thickness, excellent in interface performance and suitable for a film lamination method.

The utility model discloses a kind of tensile tear-resistant reinforced CPVC cable protection pipe, it includes pipeline, the inside fixed connection of pipeline has CPVC resin, the inside fixed connection of CPVC resin has nano calcium carbonate, the inside fixed connection of nano calcium carbonate has calcium-zinc stabilizer.Through the above structure, there is a layer of CPVC resin in pipeline, the smooth surface of CPVC resin can reduce the contact area of cable and pipe wall, reduce the local temperature rise caused by heat generation due to friction, while the air gap between pipe wall and cable is more uniform, beneficial to the heat dissipation of cable operation, prolong the service life of cable, there is also a layer of nano calcium carbonate in it, nano calcium carbonate particle size is usually 10~100nm, specific surface area is large and dispersibility is good, uniformly filled in CPVC resin matrix can form "rigid particle reinforcing effect", the tensile strength of inner wall layer is improved by 20%~30%, and bending modulus is improved by 15%~25%.

The invention provides a glass fiber reinforced polypropylene material and a preparation method thereof, and belongs to the technical field of propylene copolymers. The preparation method comprises the steps of maleic anhydride copolymer preparation, polypropylene pretreatment, glass fiber pretreatment and blending. The method for preparing the maleic anhydride copolymer comprises the following steps: adding maleic anhydride, styrene and azodiisobutyronitrile into methylbenzene, heating to 70-90 DEG C in a nitrogen environment, stirring and reacting for 1-2 hours at the current temperature, adding glycidyl acrylate, continuously reacting for 30-50 minutes, naturally cooling, filtering, washing and drying to obtain the maleic anhydride copolymer. According to the glass fiber reinforced polypropylene material, the tensile strength is 32-35 MPa, the elongation at break is 71-75%, and after a thermal aging test, the tensile strength is 29-33 MPa, and the elongation at break is 65-70%.

This invention discloses an enhanced antistatic polyetheretherketone (PEEK) composite material and its preparation method. The composite material is prepared from the following raw materials in parts by weight: 60-85 parts of PEEK resin, 5-15 parts of a first synergistic component, 3-10 parts of a second synergistic component, 2-8 parts of a third synergistic component, and 1-5 parts of a high-temperature processing aid. The first synergistic component is a mixture of a metal-based conductive filler and a high-temperature resistant antistatic synergist; the second synergistic component is ionic liquid-functionalized modified graphene; the third synergistic component is a composite of carbon nanotubes and conductive nanofibers; and the high-temperature processing aid includes a high-temperature lubricant and a high-temperature antioxidant. The preparation method includes steps such as preparing various premixes, melt blending, extrusion granulation, and supercritical fluid in-mold foaming. This invention constructs a stable three-dimensional conductive network through the synergistic effect of multi-scale conductive fillers, giving the composite material excellent antistatic properties.

The application belongs to the technical field of high polymer materials, and particularly relates to a PET-based long-acting antistatic master batch as well as a preparation method and application thereof. The application adopts HBP-IM and HOOC-PEG-COOH as comonomers, and anchors the antistatic active chain segment to the PET main chain through in-situ polycondensation reaction, so as to avoid the resolution and diffusion loss of the antistatic agent in the subsequent use or washing process. The hyperbranched structure provides sufficient free volume for the imidazole salt ion group, and cooperates with the effective passivation of trimethyl phosphate on the catalyst activity and the end capping of the carbodiimide on the carboxyl group, so as to jointly inhibit the ester exchange side reaction that may be intensified in the polycondensation process. The reaction process is precisely controlled through a stepwise reduced-pressure polycondensation program, the functionalized PET copolymer melt obtained from the polymer kettle is directly pumped into a double-screw extruder for blending and granulation in a molten state without cooling and granulation, and the hydrolysis and thermal cracking probability of the PET molecular chain in the secondary heating process is greatly reduced.

The application belongs to the technical field of melt electrospinning equipment, and provides a screw-embedded self-viscosity-reducing melt electrospinning nozzle, which comprises a first inner sleeve, a second inner sleeve arranged outside the first inner sleeve, a first flow gap arranged between the first inner sleeve and the second inner sleeve, an outer sleeve arranged outside the second inner sleeve, a stirring part for stirring the melt in the first sleeve, and a motor for driving the screw to rotate. The melt in the first inner sleeve is stirred by the screw, and the melt is sprayed onto the nozzle cone surface through the second flow outlet under the action of pressure. The melt is subjected to twice physical actions, so that the viscosity of the melt is greatly reduced, and the functions of refining the fiber and improving the product quality are achieved.

The application relates to a high-dispersion carbon nanotube reinforced PTFE composite material and a preparation method thereof, relates to the technical field of polymer composites, and comprises PTFE powder, surface-modified carbon nanotubes and a composite dispersant; wherein the surface-modified carbon nanotubes are multi-walled carbon nanotubes modified by a fluorosilane coupling agent, and the composite dispersant is composed of polyethylene glycol octyl phenyl ether and potassium perfluorooctyl sulfonate. The application has the effects of realizing stable and uniform dispersion of carbon nanotubes in a PTFE matrix, enhancing interface bonding force, and not damaging the intrinsic properties of the carbon nanotubes.

The invention discloses soluble polyimide resin with high temperature resistance and stable thermal size as well as a preparation method and application of the soluble polyimide resin. The soluble polyimide resin has a structure as shown in the following formula, n is more than 0 and less than or equal to 10, and X is more than or equal to 0.5 and less than 1. The polyimide resin provided by the invention has the characteristics of low melt viscosity, high solubility, stable thermal size of a cured product and ultrahigh heat resistance, and solves the technical problems of poor manufacturability, high thermal expansion coefficient of the cured product, insufficient heat resistance and poor interface of a composite material in the existing thermosetting polyimide resin.

The invention belongs to the technical field of red mud-based materials, and particularly relates to a red mud-based water-absorbing polyvinyl chloride granular material and a preparation method thereof. The granular material is composed of the following components in parts by mass: 100 parts of polyvinyl chloride resin; 65-150 parts of red mud powder which is dealkalized, dried and crushed until the average particle size is 5-10 microns; 3-8 parts of a composite modifier containing at least one of a silane coupling agent and a titanate coupling agent; 3-8 parts of a calcium-zinc composite stabilizer; 1-4 parts of a lubricant; the composite modifier is used for modifying the surface of the red mud powder, so that the red mud powder and the polyvinyl chloride resin form an interface bonding layer. The tensile strength of the obtained granular material is greater than or equal to 25MPa, the water absorption rate is 0.94-1.83%, and the granular material has mechanical stability and adjustable water absorption, so that polyvinyl chloride is highly filled with the low-cost solid waste red mud, the performance is kept, and the bottlenecks of high calcium carbonate cost and difficult red mud utilization in the prior art are solved.

This invention belongs to the field of solid-state electrolyte preparation technology, and discloses a modified porous-dense solid-state electrolyte and its preparation method, comprising: spreading molten salt material onto the porous layer surface of the porous-dense solid-state electrolyte, and heating it for the first time until the molten salt material melts; wherein, the porous-dense solid-state electrolyte comprises a porous layer and a dense layer composed of solid electrolyte powder; after the molten salt material melts, it is heated for the second time to decompose the molten salt material, and the decomposition products of the molten salt material adhere to the surface of the porous layer to obtain the modified porous-dense solid-state electrolyte. This invention provides a simple and easily scalable surface modification method based on molten salt, avoiding the use of expensive and complex surface coating technology, significantly improving the non-wetting problem between the ion-conducting network and the alkali metal, achieving the goal of improving the utilization rate of the alkali metal in the negative electrode, thereby realizing stable cycling of solid-state alkali metal batteries under high current density and large area capacity.

The invention belongs to the technical field of high polymer materials, and particularly relates to ABS-PS composite plastic with a high melt flow rate and a preparation method of the ABS-PS composite plastic. The preparation method comprises the following steps: S1, performing surface modification on montmorillonite powder by using chlorinated 1-hexadecyl-3-methylimidazole to obtain ionic liquid modified montmorillonite, and then mixing the ionic liquid modified montmorillonite, ABS resin and SAN resin for melting modification to obtain a modified ABS material; s2, mixing the modified ABS material, the PS material, a compatilizer, a titanate coupling agent and an antioxidant by using a high-speed mixer, and then feeding the mixture into a double-screw extruder for mixing and granulating to obtain the ABS-PS composite plastic with the high melt flow rate. The composite plastic disclosed by the invention has a relatively high melt flow rate and excellent flame retardant property, so that the composite plastic can be better applied to shells of household appliances such as air conditioners and the like.

This invention relates to a low-cost, long-life alkaline refractory material for non-ferrous metal smelting, and pertains to the technical field of non-ferrous metal smelting. The low-cost, long-life alkaline refractory material for non-ferrous smelting of this invention, by mass percentage, comprises a basic alkaline component, functional additives, and a binder. The basic alkaline component contains 40%–60% calcined dolomite and 20%–40% sintered magnesia. The functional additives contain 3%–8% silica fume, 5%–15% bauxite clinker, 2%–6% silicon carbide, and 1%–5% calcium fluoride. The calcined dolomite is a decomposition product of CaMg(CO3)2 calcined at 1000℃–1200℃. The alkaline refractory material of this invention has low cost (30%–50% lower than traditional magnesia-chrome bricks) and significantly improved service life in the high-temperature corrosive environment of copper, lead, and zinc smelting. It is suitable for furnace linings, chutes, flues, and other parts in non-ferrous smelting, and has significant industrial application value.

The invention discloses a disperse dye washing-free printing process for cellulose acetate fiber fabric, a magnetic bar printing machine is used for printing the cellulose acetate fiber fabric with dye, then heat preservation treatment is carried out, the dye is prepared from the following raw materials: a thickening agent, the dye, polyacrylate emulsion and the balance of water, polyacrylate molecules are of a hyperbranched network structure, and the polyacrylate emulsion is of a cross-linked network structure. The hyperbranched molecules have low melt viscosity and good flowability. During drying and color fixation, the modified additives can be more uniformly spread on the surfaces of the fibers to form a layer of compact, smooth and defect-free color film, the side chain of the modified additives contains benzene rings and cyano groups, the benzene rings can interact with a framework of the cellulose acetate fibers through Van der Waals force and a pi-pi stacking effect, the adhesion of the dye is further improved, the cyano groups are strong polar groups, and the color fastness of the dye is improved. When the fabric is used, strong dipole-dipole interaction can be generated with ester groups on cellulose acetate fibers, so that adsorption is enhanced, dye molecules are firmly locked in the fabric, and the fabric is further prevented from falling off due to friction and washing in the using process.

An ethylene-vinyl alcohol copolymer resin composition pellet group is provided, which is excellent in long-run processability. The ethylene-vinyl alcohol copolymer resin composition pellet group is a group of pellets of an ethylene-vinyl alcohol copolymer resin composition containing an ethylene-vinyl alcohol copolymer and a divalent metal salt, wherein not greater than 3 % of the pellets have a b*-value of not less than 5 after the pellets are heat-treated at 230°C for 30 minutes.

This invention proposes a spherical polylactic acid (PLA) powder with a wide sintering window, its preparation method, and its application. The preparation method includes the following steps: S1, mixing a poor solvent and PLA granules, adding the mixture to a reaction vessel, stirring, first heating, then holding at that temperature; S2, then cooling to 100-118°C, holding at that temperature for 30-60 minutes; S3, removing the product, washing and drying the product to obtain the spherical PLA powder. This invention is based on thermally induced phase separation, adding a spheroidization step to increase the crystallinity and sphericity of the PLA powder. The prepared spherical PLA powder has a particle size distribution of 10-120 μm and a bulk density of 0.3-0.45 g / cm³. 3 The powder possesses high fluidity, a wide sintering window, and excellent sintering performance, while retaining the excellent greenness and biocompatibility of polylactic acid. PLA parts formed by LPBF printing using the spherical PLA powder prepared in this invention exhibit good mechanical properties.

This invention relates to the field of architectural ceramics technology, disclosing a titanium sphene crystal frit, its preparation method, and its application. The raw materials include kaolin, titanium dioxide, quartz, potassium feldspar, calcite, and wollastonite. By pre-firing the titanium sphene crystal frit using this formula, the titanium sphene crystals are pre-dissolved in the glass phase. During the subsequent glaze firing process at 1200℃, the titanium sphene crystals melt again and precipitate a second time, resulting in an opaque glaze layer. This secondary crystallization enhances the chemical stability of the titanium sphene crystal frit during subsequent glaze firing, leading to a more stable increase in the solar reflectance of the fired glaze. This solves the problem of unstable reflectivity in glazes when directly using titanium sphene powder or combining it with titanium dioxide and titanium frit to directly form titanium sphene crystals during glaze firing.