567 results about "Surface modified" patented technology

The invention provides a grinding fluid, the grinding fluid comprises a base fluid, a grinding material, nano-diamond and a dispersion stabilizer, the base fluid comprises polyether and silicone oil, the grinding material comprises surface modified silicon carbide particles, and the dispersion stabilizer comprises polyethylene glycol stearate and polyvinylpyrrolidone. The surface roughness of a grinding piece can be reduced, the scratch density and microcracks of the surface are reduced, damage of grinding fluid to the grinding piece is reduced or even avoided, and the service life of a cutter can be prolonged. The invention also provides a preparation method of the grinding fluid and a process method using the grinding fluid.

The invention discloses a surface-modified bioactive glass oral cavity desensitization paste and a preparation method thereof, and relates to the technical field of oral cavity desensitization pastes. The surface-modified bioactive glass oral desensitization paste is prepared from the following raw materials in parts by weight: 5 to 15 parts of bioactive glass, 3 to 6 parts of modifier, 3 to 5 parts of silicon dioxide, 20 to 30 parts of humectant, 0.5 to 1 part of sweetening agent, 0.5 to 1.5 parts of foaming agent, 0.5 to 2 parts of thickening agent and 60 to 120 parts of deionized water. The surface modified bioactive glass oral cavity desensitization paste prepared by the invention has excellent antibacterial performance and dentinal tubule sealing effect.

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

The present application relates to the technical field of resin, and relates to a preparation method of high-whiteness resin, respectively preparing mesoporous SiO2@Eu 3+ The two whitening agents are mixed in a weight ratio of 1:1 to 1:4, surface modification is carried out, and then the whitening agents are melt-blended with a resin matrix; an intelligent control system is used to real-time regulate process parameters, so that the whiteness is greater than or equal to 96, and the thermal decomposition temperature is greater than or equal to 380 DEG C; the present application realizes the synergistic effect of the mesoporous SiO2@Eu 3+ The whitening agent and the TiO2 photonic crystal whitening agent synergistically act, and surface modification is carried out by using a silane coupling agent, so that the whitening agent is uniformly and stably dispersed in the resin matrix, the whiteness of the resin product is greater than or equal to 96, the risk of yellowing is reduced, and the visual appearance quality of the resin product is greatly improved.

The invention discloses a processing method of a polybutylene terephthalate bar with laser etching performance, and relates to the technical field of high polymer material processing and surface modification.The processing method comprises the following steps that in the material melting stage, a synchronous observation system of a melt rheological behavior and a temperature field is established, micro-amplitude sine torque disturbance is introduced, and the temperature field is measured; obtaining dynamic response of viscosity and shear rate, and generating a flowing fingerprint baseline; and performing spectrum decomposition on the flow fingerprint baseline, extracting signal components causing pressure pulsation, determining a critical shear rate threshold and time delay thereof, and forming a discrimination condition of an unstable region. According to the method, shear characteristics are extracted through rheological disturbance and thermal field synchronous observation, space mask driving process simulation is constructed, a feedforward adjusting curve is output, density online estimation and phase recognition are introduced, micro-pulse disturbance and temperature fine adjustment are combined, closed-loop control is formed, melt flow is dynamically stabilized, and laser engraving consistency and the product yield are improved.

The invention relates to the technical field of ink preparation, in particular to a quantum dot-containing LED-UV anti-forgery ink formula and an in-situ modification preparation process thereof, and the quantum dot-containing LED-UV anti-forgery ink formula comprises the following components in parts by mass: 2-8 parts of core-shell structure quantum dots, 20-40 parts of LED-UV curing resin, 15-30 parts of a reactive diluent, 3-8 parts of a photoinitiator, 1-5 parts of a composite anti-forgery functional aid and 5-15 parts of a high-purity solvent. The quantum dots are uniformly dispersed in an ink system after being subjected to in-situ modification treatment, in-situ modification is realized through chemical bonding of a surface modifier and hydroxyl and amino groups on the surfaces of the quantum dots, and LED-UV cured resin, an active diluent and a photoinitiator cooperate with an LED-UV light source of 365-405 nm to perform in-situ surface modification on the quantum dots, so that the quantum dots are uniformly dispersed in the ink system. The fluorescent powder is tightly combined with a resin system through chemical bonding, so that agglomeration and migration are fundamentally prevented, and the uniformity and stability of the fluorescent property are ensured.

The invention discloses a high-rigidity and high-toughness polypropylene composite material and a preparation method thereof, the high-rigidity and high-toughness polypropylene composite material comprises 55-70 g of homo-polypropylene, 10-20 g of anti-impact co-polypropylene, 18-25 g of surface modified talcum powder, 3-6 g of chopped glass fiber, 8-12 g of ethylene-octylene copolymer, 3-5 g of maleic anhydride grafted polypropylene, 0.5-1.0 g of polyethylene wax, and 0.3-0.5 g of an antioxidant 1010 and 168 (1: 1) mixture. The invention realizes the following effects: 1, a robust rigid-tough balance design: a reinforcing system with high-content talcum powder as a main body and low-content glass fiber as an auxiliary is adopted to cooperate with a POE (ethylene-octylene copolymer) flexibilizer, so that good low-temperature impact toughness is maintained while the bending modulus stably reaches 2500MPa or above; 2, interface compatibility optimization: the interface combination of the inorganic filler and the matrix is improved through PP-g-MAH, and the dispersity and the mechanical property stability are improved; and 3, process control: through optimized temperature and vacuum degree control, degradation is prevented, good performance reproducibility is ensured, and industrial production is easy.

The invention relates to the technical field of material compositing, and discloses a polyurethane composite insulation board with a good flame retardant effect, which comprises the steps of fireproof surface layer pretreatment, flame retardant core layer preparation, reinforced substrate layer treatment, lamination molding and post-treatment, by designing a unique three-layer composite structure and adopting a multi-component synergistic flame retardant system, the flame retardant effect is good, and the flame retardant effect is good. The heat insulation board can form a multi-stage flame-retardant barrier when encountering high temperature and open fire, the flame spreading speed is slowed down, the overall fireproof safety of the material is improved, and the durability and stability of the flame-retardant effect are enhanced through the synergistic effect of all the functional layers; through surface modification treatment on the functional reinforcing phase, the interface bonding force between the functional reinforcing phase and a polyurethane matrix is improved, so that the flame retardant and the reinforcing phase are uniformly dispersed in the matrix, and the performance defect caused by agglomeration is avoided, thereby enhancing the mechanical strength and structural integrity of the material while keeping excellent thermal insulation performance.

The invention relates to the field of energy storage batteries, in particular to a surface modification method of a carbon-based negative electrode material for a lithium ion battery and the carbon-based negative electrode material.The surface modification method comprises the following steps that S1, the carbon-based material, soluble saccharides, a lithium source and a solvent are mixed; s2, carrying out ball milling treatment on the slurry to obtain a precursor mixture; s3, calcining the precursor mixture to obtain a primary modified carbon material; s4, treating the primary modified carbon material in ozone to obtain an oxidation modified carbon material; and S5, dispersing the oxidation modified carbon material in a solution containing a conductive monomer and an oxidizing agent for chemical polymerization reaction, and depositing on the surface of the carbon material to form a polymer coating layer, thereby obtaining the surface modified carbon-based negative electrode material. By constructing a pre-lithiated carbon coated inner core and an ozone activation interface and preparing a modification layer of a conductive polymer, the core problems that a traditional carbon negative electrode is low in first efficiency, short in cycle life and poor in rate capability and is difficult to consider at the same time are solved.

The invention relates to an atomic layer etching system and method with a uniformity control mechanism. The ALE process includes a plurality of cycles, each cycle including a surface modification step and a sputtering step. The plasma source includes a center coil and an edge coil. The system supports the use of different selectable configurations in sputtering steps in different ALE cycles, capable of independently activating or closing the center coil and the edge coil. The flexibility provides a mechanism for adjusting the etching rate of the center and the edge of the substrate, so that non-uniformity (such as thickness difference) of the substrate to be processed is compensated. The system controller can generate a process formula based on the to-be-processed substrate data and the output specification so as to ensure that the etching process meets the expected performance requirement.

The invention discloses a Ni-W coating with a gradient structure on the surface of a pipe and a preparation method of the Ni-W coating, and belongs to the technical field of metal surface modification. According to the Ni-W coating with the gradient structure, the bottom layer is of a nanocrystalline crystalline structure, and the surface layer is of an amorphous structure; according to the gradient structure of the Ni-W coating, the tungsten content is gradually increased in the growth direction of the coating, and continuous gradient distribution is formed. In the plating process, the concentration of tungsten ions in the plating solution is controlled by regulating and controlling the current or the potential, the structure transformation of the Ni-W alloy plating layer from a nanocrystalline structure to an amorphous structure is achieved, the gradient Ni-W plating layer with the nanocrystalline crystalline structure at the bottom layer and the amorphous structure at the surface layer is obtained, the metal activity of carbon steel is enhanced, and the corrosion resistance of the Ni-W alloy plating layer is improved. And the plating layer gives consideration to the binding force, corrosion resistance and wear resistance. According to the method, the technical problems that the binding force between a carbon steel substrate and a plating layer interface is weak, and the Ni-W plating layer deposition speed is low due to the fact that the carbon steel metal activity is low are solved.

The invention belongs to the technical field of digital printing heat transfer printing materials, and particularly relates to a static-free loose-powder DTF transfer printing film and a preparation method thereof. The invention aims to solve the problem of contradiction among antistatic function, ink adsorption and peel strength of the current DTF transfer film. According to the invention, the ionic liquid antistatic agent coated by the polymer microcapsule is dispersed in the water-based resin adhesive to form the lower antistatic network structure layer; meanwhile, the crystallization behavior of the crystalline polyester hot melt adhesive resin taking bio-based 2, 5-furandicarboxylic acid as a rigid component is regulated and controlled through surface modified boron nitride nanosheets, a phase separation curing process is utilized, so that an antistatic network stably exists at the lower part of the coating, and hot melt adhesive resin microcrystals are selectively enriched on the outermost surface of the coating; and a thermally induced phase change bonding layer is formed, so that no static electricity disturbs powder in the printing and powder scattering processes.

The invention relates to a talcum powder filled polypropylene composite material based on surface modification and process cooperation and an injection molding pocking mark defect inhibition method. The material is composed of co-polypropylene, acidic salt-titanate composite modified talcum powder, flaky mica (5-10 [mu] m), a POE flexibilizer, a zeolite molecular sieve, an MAH-g-PP compatilizer, a zinc stearate dispersant and the like. According to the invention, the three measures of surface modification treatment, formula design and process purification technology are combined, and the problem of pitting defects (surface pits and white spots) generated in the injection molding process of the talcum powder filled polypropylene composite material is mainly solved. Through filler surface modification treatment, formula design and a process purification technology, the hard spot defect rate is reduced by about 85%, and the method is suitable for products with high surface quality requirements, such as automobile bumpers and instrument panels.

A method of preparing a microcapsule composition include the steps of: (a) providing a microcapsule formed of an encapsulating polymer having a primary or secondary amine group, (b) providing a deposition agent having a reactive group, and (c) forming a covalent bond between the primary or secondary amine group and the reactive group to graft the deposition agent to the encapsulating polymer. Also disclosed are consumer products containing these microcapsules.

The invention provides a modified heat-conducting filler, a pouring sealant and a photovoltaic module, the modified heat-conducting filler comprises a modified heat-conducting filler base material and a surface modifier coating at least part of the surface of the modified heat-conducting filler base material, and the modified heat-conducting filler base material is aluminum nitride, boron nitride and silicon carbide; the particle size of the aluminum nitride is 150-200 nm, the particle size of the boron nitride is 50-80 nm, the particle size of the silicon carbide is 80-150 nm, and the mass ratio of the aluminum nitride to the boron nitride to the silicon carbide is (35-45): (25-35): (10-20). The modified heat-conducting filler provided by the invention can synergistically improve the heat conductivity, weather resistance stability, high light transmittance and curing efficiency of the pouring sealant by virtue of the high-heat-conductivity modified heat-conducting filler base material, the gradient particle size range, the mass ratio and the surface modifier.

The invention provides a volume 3D printing optical element manufacturing method based on multi-dimensional spin-coating surface modification, which comprises the following steps: preparing a photosensitive resin precursor solution containing a low-concentration photoinitiator, and performing exposure molding through a volume 3D printing technology to obtain a semi-cured initial blank; preparing a spin-coating liquid containing a high-concentration photoinitiator and an optional functional additive, and coating the surface of the primary blank with the spin-coating liquid through a precise spin-coating process; and finally, light curing is performed in a vacuum environment, so that the liquid film is completely crosslinked and chemically bonded with the surface of the initial blank. The high-concentration initiator spin-coating layer is used for overcoming the oxygen inhibition effect, a traditional solvent cleaning process is replaced, and the Ralt is obtained; the high-smoothness optical surface with the thickness of 5 nm is obtained, the original geometric accuracy of printing is kept, meanwhile, spin coating liquid is used as a universal carrier, full-color coloring, gradient color and multi-layer function superposition of the surface of an optical element are achieved, and the application range of volume printing in the optical field is greatly expanded.

The application discloses a kind of plasma jet array devices for large size epoxy surface modification, including frame, tank, gas cylinder for loading inert gas, aperture network, high voltage power supply and metal insert;Tank and metal insert are fixed on frame, tank is flat tank and its slot is formed with jet airway for placing and fixing epoxy insulation, the bottom and side of tank are provided with jet spout arranged in array, jet spout is connected by gas inlet pipe, gas inlet pipe is arranged in the inside of side plate and bottom plate of tank;Aperture network is connected on jet spout and connects high voltage power supply, tank is grounded by wire;Metal insert is inserted above epoxy insulation, metal insert is grounded by wire.The application also discloses the use method applied to the above device.Adopting the application, the surface of large size epoxy insulation can be quickly and uniformly modified, and the charge release capacity is improved.

The invention discloses an antistatic teflon sleeve and a preparation method thereof. The antistatic teflon sleeve is prepared from the following components in parts by weight: 80-95 parts of teflon resin, 5-20 parts of a core-shell structure conductive filler, 1-3 parts of a compatilizer, 0.5-2 parts of a flexibilizer and 0.1-0.5 part of an antioxidant. The outer protective layer is prepared from the following components in parts by weight: 70 to 85 parts of ethylene-tetrafluoroethylene copolymer, 5 to 15 parts of modified nano silicon dioxide, 5 to 10 parts of fluororubber, 1 to 3 parts of antistatic aid and 0.1 to 0.5 part of ultraviolet absorbent. Through the design of the core-shell structure conductive filler, the core layer nano copper powder provides high conductivity, the shell layer PVDF has good compatibility with the Teflon base material, the surface modification layer further enhances the interface bonding force, the volume resistivity of the inner layer base material is reduced, and the antistatic requirement is met; the conductive filler is uniformly dispersed in the base material instead of a surface coating, so that the antistatic performance failure caused by friction or bending is avoided, and the antistatic performance is lasting and stable.

The application discloses a VR lens surface antistatic coating and a preparation method thereof, and belongs to the technical field of functional coating. The coating is composed of UV curing resin, active diluent, photoinitiator, doped conductive particles and leveling agent; the preparation method comprises the following steps: preparation of doped conductive particles, preparation of antistatic coating, coating and curing of the antistatic coating. In order to solve the problems of easy agglomeration of conductive particles in the existing coating, poor compatibility, insufficient antistatic durability and the like, the application proposes a scheme combining covalent grafting modification and step-by-step dispersion, realizes stable anchoring and uniform dispersion of the conductive particles, has high efficient antistatic property, high light transmittance and strong adhesion under low addition amount, is long-term stable, and is suitable for VR lens surface modification.

The invention discloses a preparation method for manufacturing a welding wire by using a steel wire rope, and belongs to the technical field of welding wire manufacturing, and the preparation method comprises the following steps: S1, pretreatment and intelligent grading sorting of waste steel wire ropes; s2, green composite cleaning and closed-loop recovery; s3, carrying out self-adaptive material surface modification and digital twinborn regulation and control; s4, AI intelligent burdening alloying and interface strengthening; s5, continuous casting and rolling forming and online stress accurate regulation and control; s6, detecting, grading and packaging finished products; high-valued and green recycling of the waste steel wire ropes is achieved, the quality stability and the performance grade of welding wire products are greatly improved through intelligent grading and sorting, closed-loop cleaning, digital twinborn regulation and control and multi-process precise optimization, meanwhile, the environmental protection property and the production efficiency are considered, and the production cost is reduced. A full-chain production mode of recycling-processing-regeneration-circulation is constructed, the problems that in a traditional process, resources are wasted, pollution is serious, and product precision is insufficient are effectively solved, and remarkable economic, environment-friendly and technical values are achieved.

The application discloses a shell slurry performance online quantitative evaluation system and method based on wax mold surface modification, and the system comprises a multi-state wetting wax mold preparation module, an automatic coating and multi-parameter rheological observation module and a precise wax residue analysis module which are sequentially connected and cooperatively work; the multi-state wetting wax mold preparation module selectively manufactures patterned areas with different hydrophilic and hydrophobic characteristics including hydrophilic, hydrophobic and super-hydrophobic on the surface of a standard test wax mold by controlling ultraviolet laser processing parameters; the automatic coating and multi-parameter rheological observation module is used for automatically completing slurry coating and quantifying the leveling behavior of the slurry based on machine vision; the precise wax residue analysis module adopts laser-induced breakdown spectroscopy technology and is used for quantitatively detecting the wax residue on the inner surface of the shell after dewaxing. The application also discloses an online quantitative evaluation method, which can provide direct and reliable data support for optimizing the slurry formula and the shell preparation process, thereby realizing automatic, high-precision and low-cost online quality control and reducing the casting scrap rate from the source.

The invention discloses a nano ceramic anti-corrosion heat-dissipation coating, and belongs to the technical field of coatings. Comprising a paint component A and a curing agent component B, wherein the paint component A comprises the following raw materials in parts by weight: 40-60 parts of modified epoxy resin, 15-20 parts of modified ceramic powder, 35-55 parts of a solvent, 0.6-1.2 parts of a dispersing agent, 0.3-0.6 part of a defoaming agent and 0.2-0.4 part of a flatting agent. According to the coating prepared by the invention, four ceramic fillers are introduced, so that the heat dissipation performance and the corrosion resistance of the coating can be remarkably improved; ceramic powder is subjected to surface modification through a silane coupling agent, so that the dispersity and interface bonding force of filler in a resin matrix are improved, and the overall performance is improved; the epoxy resin is modified, so that the corrosion resistance and heat resistance of the coating are further improved; in conclusion, the anti-corrosion heat dissipation coating successfully integrates the anti-corrosion function and the heat dissipation function, and the problem that the anti-corrosion performance and the heat dissipation performance of a traditional coating are difficult to consider at the same time is solved.

This invention discloses a polishing method and apparatus for nickel-based alloys based on photocatalysis and photothickening synergy. It achieves dual-driven processing by simultaneously triggering photocatalytic workpiece surface modification and photo-triggered thickening of the polishing slurry through an integrated dual-light system, realizing surface softening and medium thickening. Composite abrasive particles loaded with TiO2 / ZnO photocatalysts form a low-hardness oxide layer on the nickel-based alloy surface under ultraviolet light irradiation, reducing processing resistance. Precise viscosity control of the polishing slurry is achieved through azobenzene / cinnamic acid photochromic molecules, combined with shear-induced particle agglomeration to form a dual thickening system, improving viscosity stability. This invention solves the technical pain points of work hardening in nickel-based alloys, large viscosity fluctuations in traditional shear-thickening polishing slurries, and poor processing uniformity, improving processing efficiency and workpiece surface quality. It is suitable for efficient and precise machining of difficult-to-machine nickel-based alloys such as Inconel 718 and GH4169.

The invention discloses a laser cladding process method for improving hardness, wear resistance and metallurgical bonding strength based on an S element, and belongs to the technical field of metal material surface modification. In the laser cladding process, the S-containing element powder is added into the mixed powder, so that the flowing mode of a molten pool is fundamentally converted, the phenomenon that the molten pool faces downwards is generated through the Malangori effect, the fusion depth of the molten pool is increased through the phenomenon, the bonding area of a cladding layer and a base body is increased, and the metallurgical bonding strength is enhanced; due to the fact that strong convection is generated in the molten pool, grains in the molten pool are refined, a fine hard phase is formed, the abrasion resistance and hardness of a cladding layer are enhanced, the service life of the cladding layer is prolonged, and the method is suitable for the field of remanufacturing and surface strengthening of industrial parts with extremely high requirements for surface abrasion resistance, impact resistance and coating bonding strength.

1. Name of the product in this design: Multi-interface machining nozzle for surface modification (titanium alloy). 2. Application of this design: For laser cladding to form a coating on the surface of titanium alloy components. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention belongs to the technical field of surface modification, and particularly relates to a super-hydrophobic insulating coating with a surface microstructure and a preparation method and application of the super-hydrophobic insulating coating. The defects of poor environmental stability, low regulation and control precision, insulation performance attenuation and the like in the prior art are overcome, the static contact angle of the disclosed super-hydrophobic insulation coating is larger than or equal to 150 degrees, the rolling angle is smaller than or equal to 5 degrees, meanwhile, the insulation strength is larger than or equal to 90% of that of an original substrate (the breakdown field strength is larger than or equal to 20 kV / mm), and collaborative optimization of the super-hydrophobic performance and the insulation performance is achieved; moreover, after the coating is naturally aged outdoors for 3 years, the contact angle change rate is smaller than or equal to 10%, the insulation strength attenuation rate is smaller than or equal to 8%, and the long-term environmental stability of the super-hydrophobic insulating coating is effectively improved. A precise regulation and control mechanism is also established based on a molecular dynamics simulation-based low-droplet adhesion microstructure insulation surface design method, so that the droplet contact time is reduced by more than 60% compared with a flat surface, the instantaneous leakage current is reduced by 40%-60%, and the method not only adapts to a polluted environment with the temperature range of-40 DEG C to 180 DEG C and the salt mist concentration of less than or equal to 0.5 mg / m, but also meets the preparation requirements of power equipment with complex shapes.

The invention relates to the technical field of liquid silica gel forming, and discloses a liquid color silica gel forming process and clothing application, and the liquid color silica gel forming process comprises the following steps: step 1, base material pretreatment: selecting a flexible base material, cutting according to the size of a formed part, removing corner burrs, and sequentially carrying out ultrasonic cleaning, hot air drying and plasma activation; 2, according to the forming color requirement corresponding to the qualified flexible substrate obtained in the step 1, color paste preparation and dispersion are carried out, a bi-component addition type liquid silica gel matrix and special color paste are taken according to the mass ratio of 100: 8, 0.8% of surface modified nano-silica dispersion media are added, a dynamic shearing-ultrasonic two-stage dispersion technology is adopted for treatment, and the flexible substrate is obtained. According to the liquid color silica gel forming process, a two-stage dispersion process is adopted, a special dispersion medium is matched, uniform dispersion of color paste is achieved, and the liquid color silica gel forming process has the core advantages of being stable in color, washable and free of fading, good in silica gel fluidity after dispersion and suitable for scenes with high color requirements such as garment decoration.

The application provides a mildew-proof antibacterial halogen-free flame-retardant PC / ABS laser engraving master batch and a preparation method and application thereof, and relates to the technical field of PC / ABS alloy materials. The mildew-proof antibacterial halogen-free flame-retardant PC / ABS laser engraving master batch is prepared from the following raw materials in parts by mass: 20-70 parts of polycarbonate, 20-70 parts of acrylonitrile-butadiene-styrene plastic, 10-80 parts of modified CaCO3 particles, 10-75 parts of modified Mg(OH)2 particles, 1-5 parts of modified inorganic mildew-proof antibacterial agent, 0.1-8 parts of modified laser absorber, 0.2-1.0 parts of dispersant, 0.1-0.5 parts of antioxidant, 0.1-1 part of lubricant, and 0.2-1.0 parts of plasticizer. The surface-modified Mg(OH)2 powder, the modified inorganic mildew-proof antibacterial agent and the laser absorber can be uniformly dispersed in the PC / ABS alloy product, and the mildew-proof antibacterial performance, the flame-retardant performance and the laser engraving effect of the PC / ABS alloy product are effectively improved in a synergistic manner.

An article that includes a substrate with a first surface and a second surface and that has a bulk region and a surface modified region, the bulk region being integral with the surface modified region, and the surface modified region being at the first surface of the substrate. The bulk region including a higher concentration of at least one alkali than the surface modified region, and where a metal coating is disposed on the first surface of the substrate.