624results about How to "Good dimensional stability" patented technology

The invention discloses a porous substrate reinforced anion exchange membrane and a preparation method and application thereof, and relates to the technical field of anion exchange membranes. The porous substrate reinforced anion exchange membrane is prepared by the following steps: uniformly mixing a polyarylene alkylene type cationic polymer solution and a C1-C10 alcohol solvent, then coating two sides of a porous substrate with the mixture, and drying to obtain the porous substrate reinforced anion exchange membrane. And removing the solvent to obtain the product. According to the method, the porous substrate can be well infiltrated by the cationic polymer solution without pre-treating the porous substrate, so that the porous substrate reinforced anion exchange membrane with a sandwich-like structure is obtained. The film has outstanding swelling resistance and excellent mechanical properties, has good electrochemical properties, and has good application prospects in alkaline film energy conversion devices.

The invention discloses a composite solid electrolyte diaphragm which comprises a bacterial cellulose membrane, fluorinated metal modified PEO electrolyte particles and functional group modified particles, and the fluorinated metal modified PEO electrolyte particles and the functional group modified particles are loaded in a three-dimensional network structure of the bacterial cellulose membrane. The functional group modified particles are functional group modified silicon dioxide particles and functional group modified LATP particles, the functional group modified silicon dioxide particles uniformly wrap the functional group modified LATP particles, and fluorinated metal of the fluorinated metal modified PEO electrolyte particles is combined with functional groups of the functional group modified particles through coordinate bonds. The invention also discloses a preparation method of the electrolyte diaphragm and a battery with the electrolyte diaphragm. The ionic conductivity of the electrolyte diaphragm is improved.

The invention relates to a production process of a high-elasticity heat-resistant polyester yarn, which comprises the following steps: firstly, selecting high-molecular-weight polyethylene glycol terephthalate, adding 1-3% of nano filler and 5-10% of functional copolymer, and drying at 150 DEG C for 4-6 hours to improve the stability and processability of the material; secondly, melt extrusion is conducted at 280-290 DEG C, spinning is conducted through a multi-section temperature control spinning head, and the fiber cooling uniformity is effectively controlled. Then, two times of drafting and a heat setting process are adopted, the orientation degree of a molecular chain is improved in one time of drafting, and low-temperature plasma treatment is combined to optimize the surface activity and the setting effect of the fibers. In the secondary drafting, the fiber deformation is finely adjusted at low temperature, the thermal damage is reduced, the elasticity is improved, and finally, xylanase treatment and ultraviolet curing are combined, so that the softness, the skin-friendly property and the weather resistance of the fiber are remarkably improved.

The invention discloses a rapid development method and system for a high-performance nodular cast iron material based on electronic metallurgy, and relates to the technical field of electronic metallurgy, and the rapid development method comprises the steps that a high-performance nodular cast iron raw material is smelted through multi-stage electron beams, and uniform molten metal is obtained; monitoring the chemical components and temperature change of the molten metal in real time, and dynamically adjusting the addition of the spheroidizing agent; the pouring speed and pressure of the molten metal subjected to spheroidizing treatment are intelligently controlled, and casting pouring is conducted; the internal stress change of the casting is monitored in real time through an embedded stress sensor, and the casting cooling process is adjusted; the cooled casting is subjected to surface treatment, heat treatment and machining; component detection and performance testing are conducted on the casting obtained after treatment and machining are completed; through the multi-stage electron beam melting technology, accurate control over the temperature and chemical components of the molten metal is achieved, and the uniformity and stability of the molten metal are ensured.

A biaxially oriented industrial or household compostable film web having at least three co-extruded layers selected from the group consisting of a facing film layer, a sealant film layer, and a combination of sealant film layers and facing film layers, wherein the sealant film layer and the surface film layer each comprise from 0 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA) and from about 20 wt% to about 100 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers; and a core film layer comprising from about 30 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA), from about 20 wt% to about 40 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers.

The invention relates to the technical field of fibers, in particular to a PTT / PA eccentric core-sheath composite fiber and a preparation method thereof. The comprehensive performance of the fiber is remarkably improved through eccentric structure design and introduction of an alkyl chain into a PA sheath layer to modify PA. The composite fiber is composed of a PTT core layer and a PA sheath layer, the sheath layer contains alkyl chain modified PA, and the fiber shows excellent breaking strength, curling performance and thermal stability. The eccentric structure effectively disperses stress, brittle fracture is avoided, meanwhile, the alkyl chain modified PA enhances the flexibility and interface bonding force of a molecular chain, and the dimensional stability and thermal stability of the fiber are improved. The invention is suitable for the fields of clothing, home textiles and high-temperature industrial fibers, and meets the requirements of high strength, high elasticity and high-temperature stability.

The invention discloses a composite film material with lasting fragrance, a preparation method and application of the composite film material in sticky notes, and belongs to the technical field of composite film materials. The composite film material is composed of a PET layer, a bonding layer and a CPP layer; the PET layer comprises PET resin, composite filler, a coupling agent, an antioxidant, an ultraviolet light absorber, a heat stabilizer and a light stabilizer; the bonding layer is composed of a solvent type polyurethane adhesive; the CPP layer comprises PP resin, a modified filler, microcapsule essential oil, a coupling agent, an antioxidant, an ultraviolet light absorber, a heat stabilizer and a light stabilizer; the composite film material prepared by the invention not only has lasting fragrance, but also has strong binding force with a writable coating, high strength, good dimensional stability and high transparency.

The invention discloses a modified ceramic flame-retardant polyphenyl ether insulated wire and cable material which is prepared from the following raw materials in percentage by mass: 15%-20% of polyphenyl ether resin, 10%-20% of SEBS thermoplastic elastomer, 4%-8% of polypropylene resin, 3%-8% of maleic anhydride grafted material, 5%-20% of melamine cyanurate, 5%-15% of aluminum diethylhypophosphite, 1%-4% of 2, 3-dimethyl-2, 3-diphenyl butane, 10%-30% of compound ceramic powder and 1%-4% of antioxidant. The insulated wire and cable material disclosed by the invention has outstanding electrical insulativity, flowability and water resistance, relatively good wear resistance and electrical performance, good dimensional stability and relatively high heat resistance; the flame-retardant property is good, and the self-extinguishing property is realized; and the ceramic forming property after high-temperature combustion is excellent, and the ceramic still has excellent insulating property after being formed.

The invention relates to the technical field of energy conservation and environmental protection, and particularly discloses a preparation method of heat-insulating hydrophobic wood, which comprises the following steps: S1, mixing a silicon source and acid as raw materials to prepare silica sol, then adding an alkaline solution to prepare gel, and aging; s2, mashing the aged gel, adding hexamethyldisiloxane and hydrochloric acid for hydrophobic modification, cooling and standing after modification, discharging modified waste liquid at the lower layer, and filtering and drying a gel solution at the upper layer to obtain modified silicon dioxide aerogel powder; and S3, the modified silicon dioxide aerogel powder obtained in the S2 is added into ethyl alcohol to be evenly mixed, the dried wood is added for vacuum impregnation, drying is conducted after impregnation is completed, and the heat-insulation hydrophobic wood is obtained. The wood obtained through the method has good heat insulation and hydrophobic performance, and the size stability and mechanical performance of the wood can be effectively enhanced.

The invention relates to the technical field of engineering plastic modification, and discloses a thermal deformation resistant engineering plastic and an air conditioner fan blade, the thermal deformation resistant engineering plastic comprises the following components: 55%-60% of polyphenylene sulfide, 20%-25% of long glass fiber, 3%-5% of nano silica, 1%-2% of a graphene filler, 8%-10% of a benzimide flexibilizer, 0.5%-1% of a cross-linking agent, and 0.2%-0.5% of an antioxidant, the invention further discloses the heat-deformation-resistant air conditioner fan blade, the heat-deformation-resistant air conditioner fan blade is prepared from the heat-deformation-resistant engineering plastic, and the preparation method of the heat-deformation-resistant air conditioner fan blade comprises the steps that the engineering plastic is subjected to injection molding through an injection molding machine, the temperature of a charging barrel is set to be 290-320 DEG C, the temperature of a mold is set to be 290-320 DEG C, and the pressure maintaining time is 15-20 seconds. The silane coupling agent is adopted to perform surface modification on the glass fiber and the nano filler, so that the problems of low high-temperature strength retention rate, poor dimensional stability and high brittleness in the prior art are effectively solved.

The invention discloses a method for preparing a metal casting mold based on steel grit 3D printing, and belongs to the technical field of metal casting mold machining. In order to solve the technical problem that in the prior art, the mechanical strength and collapsibility of a metal casting mold need to be further improved, the method for preparing the metal casting mold based on steel grit 3D printing comprises the following steps that a sand mold three-dimensional model is established according to a metal casting, then casting mold steel grit is filled in an operation box of sand mold 3D printing equipment, and the casting mold steel grit is obtained; the binder storage tank is filled with a binder; and according to the section formation of the sand mold three-dimensional model, a sand paving system of the sand mold 3D printing equipment paves cast steel sand on a printing platform. The casting steel sand and the binder are matched with each other, the metal casting mold blank is prepared through 3D printing and then dried, the normal-temperature mechanical property and high-temperature property of the metal casting mold are effectively improved, the application range of the metal casting mold is widened, and meanwhile the collapsibility of the metal casting mold is improved.

The invention discloses a polyarylether sulfone polymer and a preparation method and application thereof. The preparation method of the polyarylether sulfone polymer comprises the following steps: carrying out condensation polymerization on a bisphenol compound and a dihalogen diphenyl sulfone derivative, boiling, washing and drying to obtain polyarylether sulfone resin. According to the polyarylether sulphone resin disclosed by the invention, by introducing benzoyl, the conjugation degree of a main chain of a polymer is increased, and the rigidity of the main chain is improved, so that the polyarylether sulphone resin has good thermal stability and dimensional stability; meanwhile, the hydrophilicity of the resin is improved due to the increase of carbonyl. The development and utilization prospects in the fields of sewage treatment, gas separation, solid electrolyte, battery diaphragms and the like are very wide. The invention aims to provide a novel high-temperature-resistant hydrophilic polyarylether sulfone resin and a preparation method thereof, i.e., a benzoyl group is introduced into a main chain structure of polyarylether sulfone, so that the structural rigidity of a polymer is improved, and the hydrophilicity is increased.

The bearing ring heat treatment process based on residual stress optimization comprises the following steps that S1, the surface of a bearing ring is cleaned, and it is ensured that the surface of the bearing ring is clean and free of oil stains and impurities; s2, sectional type heating treatment is conducted on the bearing ring, and the bearing ring is heated to the preset heat treatment temperature; s3, the bearing ring subjected to heat treatment is rapidly put into a quenching medium to be rapidly cooled; s4, the quenched bearing ring is subjected to tempering treatment; s5, the bearing ring subjected to tempering treatment is subjected to cooling treatment.The bearing ring heat treatment process can adjust stress distribution in the bearing ring, the cracking risk caused by stress concentration is reduced, generation of residual stress is reduced, release of the residual stress is promoted, the uniformity of residual stress distribution is improved, and the service life of the bearing ring is prolonged. And the residual stress can be effectively reduced, the toughness is improved, the structure is refined and the stability is improved, so that the quality and the service life of the bearing are improved.

According to the high-flame-retardant cryogenic insulating material and the preparation method and application thereof, low-hydroxyl-value flame-retardant polyester polyol and a flame retardant are adopted, the dosage of a chemical foaming agent is reduced, a physical foaming agent reduces the foam density and takes away heat, the flame retardance of a polyurethane material is improved, meanwhile, the reaction rate is reduced, the core burning risk is reduced, the oxygen index is larger than 30%, and the heat conductivity is smaller than 0.022 W / mK at 25 DEG C; the flame retardant grade is high; the polyester polyol has activity, so that the requirement on the activity of the catalyst and the dosage of the catalyst are reduced, and the odor grade is lower than 2.5; the low-hydroxyl-value flame-retardant polyester polyol is combined with high-functionality polyether polyol A and B for use, so that the foam size stability is improved, the foam shrinkage risk is reduced, the density of the product is 40-45 kg / m < 3 >, the compression strength is larger than 250 kPa, the tensile strength is larger than 350 kPa, the water absorption rate is smaller than 0.5%, and the size stability is smaller than 1% at-196 DEG C; the catalyst and the retarder balance milky white and gelation time, gentle the foaming rate, prevent core burning and match continuous production at the same time, the process performance is stable, the product performance is excellent, the productivity and efficiency are improved, and the cost is greatly reduced.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a derivative resin material and a preparation method of the hydrated borate micromolecule. The preparation method comprises the following steps: S1, synthesizing boron-nitrogen coordination micromolecules: dissolving and reacting boric acid, a derivative thereof and a polyfunctional group amine compound at room temperature through a solution reaction to obtain the boron-nitrogen coordination micromolecules; the borate micromolecule NCBW-X with intramolecular boron and nitrogen coordination is formed; s2, the NCBW-X micromolecule can be used for curing epoxy resin and synthesizing materials such as phenolic resin through end-NH2 and end-OH on two sides, the NCBW-X improves the mechanical property of each system through a rigid eight-membered ring, boron-nitrogen coordination of the NCBW-X can generate hydration, the environmental endurance is improved on the premise of retaining the original dynamic nature of boric acid ester of the NCBW-X, and the service life of the NCBW-X micromolecule is prolonged. Meanwhile, due to the dynamic reversibility of the NCBW-X, the NCBW-X is used for curing epoxy resin, and materials such as phenolic resin and the like are improved to a certain extent in the aspects of self-repairing and recycling.

The invention relates to the technical field of plastic modification processing, in particular to high-conductivity composite system coated black talcum powder and a preparation method thereof as well as a modified master batch containing the black talcum powder and a preparation method of the modified master batch. The high-conductivity composite system coated black talcum powder coating material is prepared from the following components in percentage by mass: 65.0 to 76.0 weight percent of high-conductivity composite system coated black talcum powder, 5.0 to 10.0 weight percent of cobalt ferrite nanoparticles, 15.0 to 20.0 weight percent of carrier resin, 2.0 to 3.0 weight percent of dispersing agent and 0.5 to 1.0 weight percent of lubricating agent, according to the technology provided by the invention, the black talcum powder is changed from a common traditional inorganic filler to a high-end functional filler with a conductive functional modification effect, so that the product added value of the black talcum powder is improved, and an important contribution is made to development and application of black talcum powder ore in China.

The invention provides a high-moisture-permeability and high-stability humidity-sensitive polyurethane material and a preparation method thereof, and relates to the technical field of material preparation, the material architecture comprises a polyol component, an isocyanate component, a chain extender component and a functional agent component, wherein the polyol component accounts for 80-92% of the whole ingredient, the isocyanate component accounts for 3-5% of the whole ingredient, the chain extender component accounts for 2-5% of the whole ingredient, the functional agent component accounts for 5-10% of the whole ingredient, the polyol component is adaptive to different performance emphasis of packaging and spinning, the isocyanate component meets the difference of processing, environment and service life, and the functional agent component accounts for 5-10% of the whole ingredient. The chain extender component adapts to the thickness and strength requirements of a membrane material, the functional agent component aims at special environment and functional requirements, perfect matching of the material and an application scene of a target product is achieved through accurate blending of the component proportion, the adaptive scene of the humidity-sensitive polyurethane material can be greatly met, meanwhile, the function of the humidity-sensitive polyurethane material is utilized and played to the maximum extent, and the application prospect of the humidity-sensitive polyurethane material is widened. Material waste is avoided, cost is saved, and production is maximized.

The invention relates to the field of weaving technology, and in particular to a warp knitting imitating woven jacquard process manufacturing method, mesh cloth and shoe upper, including a comb setting step, a warping step, a yarn threading step, and a weaving step. The invention not only has the appearance and texture of woven fabrics, a flat cloth surface, good drape and other advantages, but also has the advantages of warp knitting fabrics being crisp, good anti-loosening property, good extensibility, good dimensional stability, and not easy to have fringes. During weaving, due to the good anti-loosening property, the coil loosening defect caused by broken yarn and holes in weft knitting fabrics can be effectively solved. The invention has high output, low price, high speed, and the warp knitting fabric is not easy to have fringes, which can effectively solve the fringing defect of woven fabrics and break through the limitations of traditional processes.

The invention discloses a low-creep cap ply material prepared from recycled polyester and a preparation method of the low-creep cap ply material. The preparation method comprises the following steps: S1, a melt spinning process: carrying out melt extrusion, spinning, cooling, traction, sizing and rolling on a recycled polyester raw material; the regenerated polyester raw material is a polyester raw material with p-Tol content of less than 120ppm; s2, a yarn twisting procedure, wherein the obtained wound silk is twisted, and the designed twist degree is not larger than 46 * 46 T / 100 mm; and S3, a gum dipping process. Compared with a nylon cap ply material, the low-creep cap ply material prepared from the recycled polyester has excellent creep property and good dimensional stability, the cost can be saved by 4%, and the low-creep cap ply material is an ideal material for replacing a nylon cap ply.

The invention belongs to the technical field of alkaline anion exchange membranes, and discloses an anion exchange membrane of an aryl piperidine tetra-monomer copolymer with a branched structure, and a preparation method and application thereof. The main chain configuration of the polymer is regulated and controlled by changing the monomer structure in the main chain and the feed ratio, then the polymer and iodomethane are subjected to quaternization reaction to obtain the functionalized four-monomer polymer, and finally the membrane is cast. According to the method for preparing the anion exchange membrane from the aryl piperidine tetra-monomer copolymer with the branched structure, swelling of the membrane can be well inhibited, multi-site distribution of ionic groups is achieved while the density of the ionic groups is improved, and formation of microscopic phase separation in the membrane is promoted, so that conduction of hydroxyl ions is enhanced. The anion exchange membrane prepared by the method has the characteristics of high conductivity and low swelling, so that the anion exchange membrane can be stably and efficiently applied to the field of fuel cells.

The invention relates to the technical field of barrier films, and particularly discloses an ultrahigh water and oxygen barrier film for a vehicle-mounted OLED display product. The thickness of the ultrahigh water and oxygen barrier film is 15-35 microns, and the ultrahigh water and oxygen barrier film sequentially comprises a first antistatic layer, a first barrier layer, an OLED working layer, a second barrier layer, a polyethylene glycol terephthalate layer and a second antistatic layer, the thickness ratio of the first antistatic layer to the first barrier layer to the OLED working layer to the second barrier layer to the polyethylene glycol terephthalate layer to the second antistatic layer is (2-4): (2-4): (8-16): (2-4): (4-8): (2-4). The first barrier layer and the second barrier layer are prepared from the following raw materials in parts by mass: 1-2 parts of cholesterol, 5-15 parts of phospholipid, 1-2 parts of N-acryloyl glycinamide, 1-2 parts of graphene oxide, 0.01-0.1 part of a photoinitiator, 1-2 parts of hydroxypropyl methyl cellulose, 1-5 parts of fluorinated ethylene propylene, 1-5 parts of tetra-n-butyl titanate and 1-2 parts of a surfactant.

The invention discloses a creep-resistant high-thermal-conductivity graphene-modified high-speed steel material and a preparation method thereof. The material comprises the following elements by mass percentage: Co 15-30%, the total amount of Mo and W is 10-20% and the W content is less than 8%, Cr 5-10%, Ni 5-7%, Al 5-8%, Si 1.5-2%, V 0.5-1%, Ta 0.5-1%, Ce 0.1-0.3%, Sc 0.1-0.2%, graphene 0.5-1.5%, and the balance is iron. Based on the synergistic effect of the in-situ generated intermetallic compound and graphene material in the composite material, the toughness and thermal conductivity of the material under high temperature conditions are greatly improved while ensuring the hardness of the material, giving the material excellent high-temperature mechanical properties. The composite material is fully mixed with the raw materials and its sintering activity is improved by ultrasonic dispersion and high-energy ball milling. Under the synergistic effect of subsequent heat treatment, nano-scale intermetallic compounds are produced to obtain a significant strengthening effect.

The invention relates to an efficient heat shrink tube preparation method and equipment thereof. FEP granules and modified CaSi2 are fed into an extruder to be extruded, and an FEP pipe is obtained; placing the FEP pipe in an expansion box, taking out the FEP pipe after the pressure in the FEP pipe and the pressure in the expansion box reach expansion pressure and are stabilized for a period of time and the pressure and the temperature in the expansion box and the FEP pipe are reduced to normal pressure and low-temperature oil temperature, and respectively washing the inside and the outside of the FEP pipe with water until the product meets the use requirement; the modified CaSi2 is prepared by the following steps: reacting CaSi2 powder, DMF (Dimethyl Formamide), isocyanatopropyltriethoxysilane, 4-hydroxyphenylboronic acid pinacol ester, lanthanum 5-hydroxyisophthalate, organic tin and methylbenzene, washing, carrying out suction filtration, and drying, thereby obtaining the modified CaSi2. The lanthanum 5-hydroxyisophthalate disclosed by the invention is prepared from 5-hydroxyisophthalic acid and lanthanum nitrate; the heat-shrinkable tube prepared by the invention has a relatively high heat shrinkage ratio.

The invention provides an engineered wood veneer carbon-based light energy-saving material and a cabinet door plate product thereof. The engineered wood veneer carbon-based light energy-saving material comprises a carbon-based core material and an engineered wood veneer, the carbon-based core material comprises 25-60 parts of bamboo charcoal powder, 5-15 parts of bamboo activated carbon powder, 10-20 parts of bamboo powder, 40-70 parts of thermoplastic polymer master batch and 1-10 parts of processing auxiliary materials; the technical wood veneer comprises a technical wood veneer and a water-based environment-friendly heterogeneous adhesive. The material is prepared by preparation of a carbon-based core material and processing and compounding of a technical wood veneer, wherein the preparation of the carbon-based core material comprises the steps of batching and weighing, high-speed stirring, melting and granulating, re-mixing and molding and post-processing; technical wood veneer processing and compounding cover veneer preparation, adhesive blending, uniform gluing, assembly pre-pressing and three-section type cold pressing curing. According to the technical wood veneer carbon-based light energy-saving material and the cabinet door plate product thereof, through material formula design and preparation process planning, light weight, high strength, heat insulation, low formaldehyde release and diversified decoration are integrated, and the low-cost environment-friendly target of resource recycling is achieved.

The invention relates to the technical field of plastics, and particularly discloses modified plastic particles for automobile lamps and a preparation process of the modified plastic particles. The modified plastic particle for the automobile lamp is prepared from the following raw materials in parts by weight: 120 to 125 parts of polybutylene terephthalate, 30 to 35 parts of polystyrene, 18 to 22 parts of modified kaolin, 8 to 12 parts of nano silicon dioxide, 15 to 18 parts of modified straw fiber, 6 to 10 parts of microcrystalline ceramic powder, 4 to 6 parts of glycerol monolaurate, 3 to 5 parts of zinc stearate, 1 to 2 parts of antioxidant and 1.5 to 2.5 parts of ultraviolet light absorber. The prepared modified plastic particles for the automobile lamp have good mechanical properties such as impact resistance and wear resistance, so that the plastic has good durability.

The utility model discloses a hemp cotton knitted fabric dip dyeing device which comprises a dip dyeing box body with a dip dyeing cavity, a plurality of cloth guide roller assemblies used for unfolding and conveying to-be-dyed fabric are sequentially arranged in the dip dyeing cavity in a staggered mode in the conveying direction of the to-be-dyed fabric, and each cloth guide roller assembly comprises a fixed cloth guide roller. The movable cloth guide roller is arranged on the upper portion of the fabric to be dyed and staggered with the fixed cloth guide roller, a horizontal adjusting area allowing the fabric to be dyed to penetrate through is formed between the fixed cloth guide roller and the movable cloth guide roller, and a control device used for driving the movable cloth guide roller to ascend and descend is arranged on the dip dyeing box body. Through the fixed cloth guide rollers and the movable cloth guide rollers which are arranged in a vertically staggered mode, the optimal dip dyeing curvature of gray fabric can be flexibly adjusted, the fabric is dyed in a relatively loose state, and the size stability and the good cloth cover effect of the China-hemp cotton knitted fabric are obviously improved.

A package substrate and a manufacturing method are provided, the package substrate includes a core plate body and dielectric layers formed on two opposite surfaces of the core plate body, and the dielectric layers serve as surface covering layers to prevent the substrate from cracking. The packaging substrate further comprises a plurality of through holes penetrating through the core plate body and the dielectric layer, barrier layers formed on the inner walls of the plurality of through holes, and seed crystal layers formed on the barrier layers on the inner walls of the plurality of through holes, so that the circuit parts and the circuit structures on the two opposite surfaces of the core plate body are electrically connected.

The invention relates to the technical field of food packaging, and discloses a flour packaging bag based on single material compositing, which comprises a middle-sealed folding bag and an eight-edge-sealed folding packaging bag, and comprises a first bag body and a first bag side applied to the middle-sealed folding bag, one side edge of the bag body is connected end to end and then is sealed to form a middle sealing part, and the other side edge of the bag body is sealed to form an eight-edge-sealed folding packaging bag. The first bag body and one end face of the bag side are connected and then are subjected to edge sealing to form a transverse sealing part, the position, located on the transverse sealing part, of the first bag body is coated with an adhesive tape, and after middle sealing is completed, the middle sealing part is attached to the adhesive tape. By adopting the unstretched PE film composite design, the tensile strength, the heat sealing performance and the tear resistance of the packaging bag are remarkably improved, the heat sealing temperature is as low as 120 DEG C or below, and the bag breaking risk is reduced; the method is suitable for complex bag shape processing; through the environment-friendly solvent-free adhesive and the dry type compound technology, the production efficiency is improved, the cost is reduced, meanwhile, efficient recycling and environment-friendly performance are achieved, and the packaging requirement of heavy objects is met.

The invention relates to the technical field of coatings, in particular to an inorganic water-based carbon nanotube metal corrosion prevention coating and a preparation method thereof. The inorganic water-based carbon nanotube metal corrosion prevention coating comprises the following components in parts by weight: 15-20 parts of modified carbon nanotubes, 5-10 parts of modified water-based epoxy resin, 20-25 parts of a hydroxyl acrylic emulsion, 20-25 parts of a filler, 1-3 parts of a silane coupling agent, 1-4 parts of a flatting agent, 2-5 parts of a dispersing agent, 1-4 parts of a flash rust inhibitor, 1-3 parts of a coalescing agent, 2-4 parts of a defoaming agent and 30-50 parts of deionized water, the preparation method comprises the following steps: stirring the modified carbon nanotubes, the modified water-borne epoxy resin, the hydroxyl acrylic emulsion, the filler, the silane coupling agent, the flatting agent, the dispersing agent, the flash-rust inhibitor, the coalescing agent, the defoaming agent and the deionized water in parts by weight at 40-50 DEG C for 20-30 minutes. The coating prepared by the method disclosed by the invention is uniform in dispersion, good in adhesive force, excellent in corrosion resistance and durability stability, and long in service life.

The forming method comprises the following steps: providing a polypropylene base material and an additive, and carrying out pre-drying treatment on the polypropylene base material and the additive according to a preset weight percentage; melting and mixing the pretreated polypropylene base material and an additive in a range of 190-220 DEG C by using a twin-screw extruder, carrying out extrusion molding by using a circular mold, rapidly cooling the extruded thermoplastic pipe to room temperature by using a continuous water cooling device, and sizing by using a sizing roller way; the cooled pipe is moderately stretched in the longitudinal direction and the transverse direction through a two-way stretching device, and online detection is conducted through detection equipment; through collaborative optimization of the materials and the process, the produced weather-resistant photovoltaic pipe has excellent ultraviolet resistance, oxidation resistance and mechanical properties and is suitable for a photovoltaic system environment with high requirements, and high-quality preparation of the weather-resistant photovoltaic pipe is achieved.