20results about How to "Improve surface smoothness" patented technology

The invention provides a low-water-absorption glass bead modified PBT (polybutylene terephthalate) material and a preparation method thereof. The low-water-absorption glass bead modified PBT material comprises the following components in parts by weight: 70-100 parts of PBT resin; 0 to 30 parts of solid glass beads; 0-5 parts of a toughening agent; 0-2 parts of an antioxidant; 0-2 parts of a lubricant; 0-2 parts of black color master batch; 0-2 parts of a coupling agent; 0-5 parts of polytetrafluoroethylene wax; wherein the average particle size of the solid glass beads is 1-50 [mu] m; the average particle size of the polytetrafluoroethylene wax is 3-15 [mu] m, and the weight-average molecular weight of the polytetrafluoroethylene wax is 10000-30000 g / mol; the weight ratio of the solid glass beads to the polytetrafluoroethylene wax is (5-10): 1. According to the invention, the polytetrafluoroethylene wax is added into the solid glass bead modified PBT material, so that the shrinkage difference between the material flow direction and the vertical flow direction is effectively reduced, the water absorption rate of the material is remarkably reduced, the preparation process is simple, and the production process is easy to control.

The preparation method of the yellowing-resistant nylon particle composite material comprises the following steps: S1, weighing 100 parts by weight of nylon, and adding the nylon into a reaction kettle; s2, adding 2, 2, 2-trifluoroethanol as a solvent into the reaction kettle, and stirring to form a uniform nylon dissolving solution; s3, conveying the nylon dissolving solution into a spray dryer through a peristaltic pump, and performing atomization, drying and powder collection under the protection of nitrogen; s4, placing the powder in a vacuum drying oven, and drying at 25 DEG C for 3 hours to obtain nylon powder; s5, mixing the nylon powder with the following raw materials in parts by weight: 1-2 parts of an ultraviolet light absorber, 1-2 parts of a hindered phenol antioxidant, 2-4 parts of adipic acid, 0.5-1.5 parts of sebacic acid, 0.1-0.5 part of dicumyl peroxide and 8-10 parts of silane coupling agent modified mica powder; and S6, carrying out melt blending on the mixture obtained in the step S5 in a twin-screw extruder to obtain the yellowing-resistant nylon particle composite material.

The utility model discloses a high-strength glass fiber pipe with a paint-free and highlight surface, which is characterized in that the pipe wall of the glass fiber pipe comprises an inner PET (polyethylene terephthalate) cloth layer, a middle structure layer and an outer PET cloth layer from inside to outside, the middle structure layer comprises a resin layer formed through a compression molding process and glass fiber filaments distributed in the resin layer or a plurality of glass fiber rods penetrating through the resin layer and extending in the axial direction, and pores of the outer PET cloth layer are filled with resin permeating outwards in the compression molding process; pores of the inner PET cloth layer are filled with resin which permeates inwards in the mold pressing process. During forming, part of resin of the resin layer penetrates through and fills pores of the outer PET cloth layer and the inner PET cloth layer, so that the surface smoothness is improved; by means of the colors of the outer PET cloth layer and the inner PET cloth layer, surface processing is not needed, the bottom exposure phenomenon is avoided, the production steps are simplified, the production efficiency is improved, and the production cost is reduced; and the resin penetrates through the outer PET cloth layer and the inner PET cloth layer to form an interlocking structure, so that the interlayer peeling strength is improved, and layering is prevented.

This invention belongs to the field of papermaking and provides a high-efficiency antibacterial and mildew-resistant liquid crystal glass spacer paper and its preparation method. It includes: (1) Base paper preparation process: 100% bleached softwood pulp is selected as fiber raw material, pulped to 22-28°SR, without adding any wet end additives to ensure the cleanliness of the base paper, formed on the wire in the headbox, and then dewatered in the press section to obtain a basis weight of 48-52 g / m 2 (2) Surface treatment process: Select hydrophobically modified polyvinyl alcohol, mildew inhibitor and water-resistant agent to prepare surface sizing solution, the concentration of surface sizing solution is 2-4%, and apply sizing solution to the surface of the base paper, the amount of sizing is 0.8-2g / m 2 After drying in a drying cylinder, the material is calendered and then rolled to obtain a high-efficiency antibacterial and anti-mildew liquid crystal glass spacer. The liquid crystal glass spacer prepared by this method has good hydrophobic properties and anti-mildew effect, while also taking into account the characteristics of high cleanliness, low electrical conductivity, and high surface strength.

The application provides a UV white ink and a preparation method thereof. The preparation raw materials of the UV white ink include, in parts by weight, 3-15 parts of silicone-modified acrylate prepolymer, 30-90 parts of monofunctional monomer, 1-10 parts of bifunctional monomer, 3-10 parts of photoinitiator, 1-15 parts of titanium white, 0.1-5 parts of dispersant and 0.1-5 parts of auxiliary agent. The silicone-modified acrylate prepolymer is used to improve the flexibility, smoothness and water resistance of the ink layer, and the specific functional monomer compound system is used to inhibit the curing shrinkage and enhance the adhesion, so that the UV white ink with excellent comprehensive performance is obtained, and is suitable for the inkjet printing of silica gel labels.

This utility model discloses a packing assistance device for partitions, comprising two sets of guide assemblies respectively disposed on both sides of the upper end of the box. Each guide assembly includes a vertically positioned limiting guide plate parallel to the side wall of the box, and an auxiliary guide plate disposed on the outer side of the limiting guide plate facing the side wall of the box. The bottom of the auxiliary guide plate is flush with the side wall of the box, and a strip-shaped bent portion outlet matching the width of the partition is formed between the bottom of the auxiliary guide plate and the bottom of the limiting guide plate. One end of the top of the auxiliary guide plate extends outward relative to the other end of the box side wall, and a bent portion inlet with a smaller spacing at one end and a larger spacing at the other end is formed between the top of the auxiliary guide plate and the top of the limiting guide plate. This packing assistance device can guide and adjust the insertion angle of partitions with insufficient bending or outwardly flared bending portions during the process of inserting the partition into the box from top to bottom, ensuring that the lower end of the bent portion of the partition is inserted into the box in a state of parallel and close contact with the inner wall of the box.

The present application relates to the technical fields of data line terminal press fitting equipment with positioning mechanism, and discloses a data line terminal press fitting equipment with positioning mechanism, which comprises a bottom plate, the top of the bottom plate is sequentially provided with a terminal pressing mechanism and a wire pressing mechanism from left to right, and the top of the bottom plate is fixedly connected with a lifting mechanism located at the left side of the terminal pressing mechanism. The data line terminal press fitting equipment with positioning mechanism has the advantages of high press fitting efficiency and high positioning accuracy, solves the problem that the existing data line terminal mostly needs to be manually clamped into the clamping groove for press fitting, and the manually placed data line terminal is easily affected by the data line to cause the data line terminal to be skewed, has low positioning accuracy, and the terminal is easily affected by the torsion of the data line during the press fitting process, causing the terminal to be raised and affecting the pass rate of the data line terminal press fitting, and has poor press fitting efficiency and low pass rate.

The application discloses monodisperse smooth spherical silver powder, a preparation method and application thereof, wherein the silver powder has a particle size distribution parameter D100 of less than or equal to 4.0 microns, a sphericity ratio range of 0.85 to 1.15, and a specific surface area range of 0.60 to 0.75 m 2 / g. In view of the trend of narrow line width of the metalized printing of the crystalline silicon solar cell, the silver powder as the conductive phase of the silver paste needs to have a smaller D100 value and higher monodispersity. The application realizes high sphericity of the silver particles by constructing high supersaturation, inhibits agglomeration by combining two types of surface adsorbents with adsorption effect, and then adjusts the D100 value and optimizes the smoothness of the surface by Ostwald ripening process, so as to obtain the silver powder with excellent monodispersity, small D100 value, high sphericity and smooth surface, which effectively meets the high-precision requirement of the narrow line width printing of the photovoltaic cell, and is suitable for the field of high-performance conductive paste preparation.

This invention provides a glass fiber reinforced polyamide composite material, its preparation method, and its application. The glass fiber reinforced polyamide composite material comprises a polyamide matrix, glass fibers, and a rigid flow aid; the rigid flow aid is at least one of a three-armed aromatic polyamide; the structural formula of the three-armed aromatic polyamide is as follows: The preparation method includes: mixing the polyamide matrix, glass fibers, rigid flow aid, and optionally a surface compatibilizer, followed by molding to obtain the glass fiber reinforced polyamide composite material. The composite material prepared by this invention exhibits improved surface smoothness, reduced fiber floating phenomenon, and enhanced mechanical strength.

A method for producing a carboxyl group-containing liquid nitrile rubber is provided, the method comprising: bringing a latex of a carboxyl group-containing liquid nitrile rubber into contact with a mono- or divalent metal salt under a condition at a pH of 5 or less to salt out and separate the carboxyl group-containing liquid nitrile rubber from an aqueous phase.

The invention relates to the technical field of metal corrosion prevention, in particular to a wear-resistant and corrosion-resistant aluminum alloy and a surface treatment process thereof. The aluminum alloy plate is sequentially subjected to polishing, hanging, oil removal, water washing, alkali corrosion, water washing, pure water washing, bright dipping, water washing, pure water washing, hard anodic oxidation, hanging, water washing, pure water washing and blow-drying, and the surface-treated aluminum alloy plate is obtained. The polyurethane coating is obtained by adding raw materials such as hydroxyl-terminated fluorosiloxane, fluorine-containing polyol, quaternary ammonium salt polyol, polypropylene glycol, isophorone diisocyanate, a composite graphene material and the like. And the polyurethane coating is brushed to the surface of the surface-treated aluminum alloy plate, and the wear-resistant and corrosion-resistant aluminum alloy finished product is obtained. The finished product prepared by the invention has excellent wear resistance, corrosion resistance and antibacterial property, so that the finished product has a wide application prospect in the technical field of metal corrosion prevention.

This invention provides a method for preparing large-diameter polyphenylsulfone (PPS) monofilaments, comprising the following steps: mixing PPS and a lubricant and then performing melt extrusion to obtain a melt; extruding the melt through a spinneret to obtain nascent monofilaments; sequentially subjecting the nascent monofilaments to oil bath cooling, drawing, and winding to obtain cooled and shaped nascent monofilaments; and sequentially subjecting the cooled and shaped nascent monofilaments to slow drawing and heat setting to obtain large-diameter PPS monofilaments; the slow drawing speed is 3–5 m / min. The addition of a lubricant in this invention improves the flowability and extrusion stability of PPS, preventing melt fracture during extrusion. The subsequent oil bath cooling improves the surface smoothness of the cooled nascent monofilaments, which is beneficial for subsequent drawing. The slow drawing speed allows for slow cold drawing of the nascent monofilaments, which not only enables molecular chain orientation but also prevents filament breakage, thereby obtaining large-diameter PPS monofilaments.

The invention relates to the technical field of polishing devices, in particular to a polishing device for flute processing, which comprises an external control part, a mounting part is arranged outside the external control part, an internal polishing part is arranged in the mounting part, a flute fixing part is arranged in the mounting part, and an external polishing part is arranged in the mounting part; when the outer grinding frame moves to the position of the bamboo ring, the punching and grinding frame can stretch out by rotating the rear control frame, the surface of the bamboo ring is pointedly ground, meanwhile, the bamboo ring is prevented from mechanically blocking the movement of the moving frame and the outer grinding frame, it is ensured that the grinding assembly smoothly moves along the outer wall of the flute, and unified grinding of the flute body and the bamboo ring is achieved; the polishing continuity and uniformity of the outer wall of the bamboo flute are guaranteed, and the problems that in the intelligent manufacturing equipment industry, when the polishing assembly moves along the outer wall of the flute to conduct polishing operation, the bamboo ring can mechanically block the polishing assembly, the polishing assembly cannot move smoothly, and then the polishing continuity and uniformity of the outer wall of the flute are affected are effectively solved.

Provided are: a powder composition comprising a polyamide powder (A) and an inorganic reinforcing material (B), in which the polyamide powder (A) has a D50 particle diameter of 1 µm or more and 100 µm or less and a sphericity of 80 or more and 100 or less, the inorganic reinforcing material (B) has an average major axis diameter of 3 µm or more and 300 µm or less and an (average major axis diameter) / (average minor axis diameter) ratio of 1 or more and 15 or less, and the inorganic reinforcing material (B) is contained at an amount of 5% by weight or more and 60% by weight or less relative to the total weight of the powder composition; a method for producing a three-dimensional model object by a powder bed fusion method using the powder composition; and a three-dimensional model object. The powder composition comprises a specific polyamide powder and a specific inorganic reinforcing material, and therefore has a high flowability and can maintain the flowability at a satisfactory level even when used for recycling. When the powder composition is applied to three-dimensional modeling, a model object having both of a surface smoothness and a high elastic modulus can be obtained.

The invention relates to the technical field of pipes, in particular to a functional master batch for a high-weather-resistance and high-antifouling net cage pipe as well as a preparation method and application of the functional master batch. The invention relates to a functional master batch for a high-weather-resistance and high-antifouling net cage pipe. The functional master batch for the high-weather-resistance and high-antifouling net cage pipe is prepared from the following raw material components: a flexible solubilizer, a functional filler, a weather-resistant master batch and a functional antifouling agent, the functional filler is titanium dioxide coated hollow glass beads of which the surfaces are modified by a silane coupling agent; the weather-resistant master batch comprises the following raw materials: polyethylene, a light stabilizer, an antioxidant and carbon black. The functional master batch for the high-weather-resistance and high-antifouling net cage pipe has the characteristics of good antifouling property, good weather resistance, long-acting antifouling property and excellent mechanical property of the net cage pipe; the technical problems that an existing net cage pipe is insufficient in weather resistance, fast in heat absorption, high in temperature, prone to degradation in mechanical property and poor in antifouling durability, and the mechanical property and the antifouling property of the net cage pipe are contradictory are solved.

The invention discloses a preparation method of a high-toughness impact-resistant box plate anti-collision appearance package, and particularly relates to the technical field of high-performance plant fiber composites.According to the package, bleached softwood and hardwood pulp are used as substrates, modified aramid pulp is introduced for reinforcement, and carboxylated butyronitrile latex and nano-zinc oxide are used for preparing pre-crosslinking toughening emulsion. After wet molding, the composite material is prepared by adopting a gradient variable-temperature hot-pressing process of pre-hot-pressing dehydration, high-temperature plasticizing crosslinking and cold-pressing surface finishing. According to the invention, an'ion coordination-covalent bond 'dual network and a dynamic sacrifice bond mechanism are constructed, energy is dissipated through chemical bond breakage when the material is impacted, and the toughness and collision resistance of the material are remarkably improved in cooperation with the microcosmic bridging effect of the aramid pulp, so that the defect of high brittleness of a traditional paperboard is overcome. And meanwhile, gradient hot pressing endows the packaging surface with high-density and high-gloss plastic-like texture, and unification of functions and appearance is achieved.

A process for producing a blow-molded foam is described. The process includes kneading (S1) a polyolefin-based resin containing a foaming agent mixed therewith in an extruder, and extruding (S3) a parison (32) between split mold blocks from a die slit (21) at an extrusion rate of 700 kg / h or more. Further, a blow-molded foam is described. The blow-molded foam has a wall formed in such a manner that a thermoplastic polyolefin-based resin containing a foaming agent mixed therewith is subjected to blow molding, wherein the wall has a closed cell structure including a plurality of foamed cells, the foamed cells have an average cell diameter of less than 300 µm in the thickness direction of the wall, an outer face of the wall has a center-line average surface roughness Ra of less than 9.0 µm, and the foamed cells have a cell diameter having a standard deviation of less than 40 µm in the thickness direction of the wall.

This invention discloses a PFAS-free, high-efficiency PET release masterbatch and its preparation method, belonging to the field of polymer materials. The masterbatch uses PET as a matrix, compounded with specially modified organosilicon, nano-silica, dispersants, and antioxidants. It is fluorine-free and environmentally friendly. The preparation method first prepares a hydroxyl-modified organosilicon intermediate through hydrolysis and condensation, then grafts it with terephthalic acid to obtain a specially modified organosilicon suitable for PET. Finally, it is mixed with other raw materials and extruded into granules. The masterbatch obtained by this invention can significantly reduce the surface friction coefficient of PET products, increase the contact angle, achieve high release efficiency, produce a smooth, scratch-free surface, and does not affect the transparency and processing flow of the product. It can reduce processing defects and improve production line efficiency, and is suitable for PET injection molding, blow molding, and other processing. It can also be extended to the processing of polymers such as PBT and PLA, combining environmental friendliness and practicality.

This invention relates to a conductive low-exudation polyamide composition, its preparation method, and its application. The conductive low-exudation polyamide composition is prepared from the following components in parts by weight: 35-65 parts polyamide resin, 20-50 parts carbon nanotube masterbatch, 1-20 parts toughening agent, and 0.1-2 parts antioxidant. The carbon nanotube masterbatch is prepared by coating carbon nanotubes with polyether block amide as a carrier. This invention adds carbon nanotube masterbatch coated with polyether block amide as a carrier to pre-disperse the carbon nanotubes. On the one hand, polyether block amide has excellent compatibility with long-chain polyamides, allowing the carbon nanotubes to be well dispersed in the matrix phase. On the other hand, polyether block amide itself has good antistatic properties, and it can have a good conductive synergistic effect with carbon nanotubes, ensuring that the conductivity of the polyamide composition does not change over time or with environmental factors, maintaining good conductivity over a long period.

This application provides a method for preparing an anti-biofouling ultrafiltration membrane. By copolymerizing cellulose acetate and dextran-40 and optimizing their composition and ratio, the pore size distribution range of the ultrafiltration membrane can be controlled, achieving more precise pore size control. Dextran-40 has good anti-protein adsorption properties, while cellulose acetate has certain hydrophilic properties. The copolymerized product may have better antifouling properties, reducing protein adsorption and membrane adhesion, and extending the service life of the ultrafiltration membrane. This solves the technical problems of poor antifouling performance of existing ultrafiltration membranes, which leads to a decrease in membrane flux, and poor adhesion of chitosan to polyethersulfone, which easily dissolves and causes the failure of antifouling ability. By fixing the composite material of silver nanoparticles and chitosan onto the ultrafiltration membrane by inkjet printing, an antibacterial layer can be formed, enhancing the antibacterial properties of the ultrafiltration membrane and reducing the adhesion and reproduction of microorganisms.