71results about How to "Improve adhesion strength" patented technology

The invention provides a fiber dressing for promoting wound healing and a preparation method and application thereof, and belongs to the technical field of biological materials. The shell of the fiber dressing contains the first medicine for promoting polarization of macrophages, and the first medicine can promote polarization of macrophages at normal and diabetic wound surfaces from M1 type to M2 type; a shell substrate is a mixture of hydrophilic and hydrophobic polymers, so that painless adhesion and stripping of a wound surface can be realized by absorbing seepage and spraying non-irritant normal saline on the wound surface, and secondary injury of the wound surface is reduced; an inner core contains a second medicine and a third medicine which are used for inducing death of M1 type macrophages, so that wound inflammatory response can be reduced, wound bacteria can be killed, wound infection degree can be reduced, and wound healing can be accelerated; the core matrix is a mixture of hydrophilic and hydrophobic polymers with good biocompatibility, can provide mechanical support for the fiber dressing, and provides a slow release effect for the two substances in the core. By controlling the composition of the inner core and the shell, the healing of normal wounds and diabetic wounds can be effectively promoted.

The invention discloses an ultralow-temperature-resistant urea-bond-containing polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesives, and the ultralow-temperature-resistant urea-bond-containing polyurethane adhesive is characterized by comprising the following components in parts by weight: 50-65 parts of urea-bond-containing isocyanate prepolymer; 10 to 20 parts of isocyanate; 0.05 to 1 part of a composite catalyst; 0.2 to 1.5 parts of a latent curing agent; 0.05 to 2 parts of a water absorbent; 5-10 parts of a diluent; the invention has the advantages that the preparation process is simple, interlayer lamination can be carried out at low temperature, the curing speed after bonding is high, the ultra-low temperature resistance and hydrolysis resistance are very good, and the problems of slow curing, low peel strength, ultra-low temperature brittleness and the like of the existing product can be effectively solved.

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 flotation recovery method comprises the following steps: carrying out ore grinding and dissociation treatment on raw copper ore, then carrying out roughing, and grading roughing tailings to obtain three-fraction ore pulp products of + 200 meshes, 200-400 meshes and-400 meshes; the + 200-mesh ore pulp product is subjected to coarse grain flotation, a combined collecting agent of disulfide diisopropyl xanthate and isopropyl xanthate is adopted for recycling coarse grain copper minerals, and obtained rough concentrate is returned to the ore grinding operation; carrying out fine particle flotation on the ore pulp product with the size of-400 meshes by adopting a fine particle flotation collecting agent, and combining obtained rough concentrate with copper roughing rough concentrate for concentration; ore pulp products of 200-400 meshes are directly used as tailings. According to the method, the lost coarse and fine copper minerals in the ore pulp can be intensively recovered, and the copper flotation recovery rate can be increased.

The invention relates to the technical field of composite biological coatings. Specifically, the invention relates to a hydrophobic composite layer on a medical degradable magnesium alloy matrix and a preparation method of the hydrophobic composite layer. In the preparation method, firstly, a porous ceramic oxide layer is formed on a magnesium alloy matrix through micro-arc oxidation treatment, so that the corrosion rate of the magnesium alloy is reduced; then, a strontium-doped hydroxyapatite layer is prepared on the surface of the micro-arc oxidation layer by using a chemical deposition method, so that the biocompatibility of the magnesium alloy is improved; and finally, dipping and pulling the magnesium alloy subjected to micro-arc oxidation and chemical deposition treatment in a polylactic acid solution containing nano-hydroxyapatite for one time or multiple times, so as to form a hydrophobic polymer layer. According to the hydrophobic composite layer prepared by the method, the corrosion resistance and the biocompatibility of the magnesium alloy are improved at the same time. The invention also relates to a magnesium alloy implant article comprising the hydrophobic composite layer.

The utility model belongs to the technical field of sliding door structures, and discloses a door leaf structure of a sliding door, which comprises an upper rail, a lower rail, a smooth rabbet and a hooked rabbet, and is characterized in that the smooth rabbet and the hooked rabbet are respectively provided with a first glass mounting groove and at least one first anti-collision strip mounting groove, and the first glass mounting grooves and the first anti-collision strip mounting grooves are oppositely arranged; two side groove walls of the first glass mounting groove are symmetrically and respectively provided with at least two first clamping strips which extend towards the inner side in parallel, and at least two first glue solution accommodating grooves are formed between the adjacent first clamping strips and between the first clamping strips and the groove walls; and an anti-collision strip is mounted in the first anti-collision strip mounting groove. According to the utility model, redundant glass cement can be accommodated in the groove, so that the glue solution can be effectively prevented from overflowing, the adhesive strength between the glass and the section bar is increased, the door opening space can be enlarged, and the aesthetic feeling and the passing convenience are improved.

The invention relates to biological glue as well as a preparation method and application thereof. The biological glue comprises the following components: tannic acid, gelatin and polyvinylpyrrolidone, the polyvinylpyrrolidone comprises a mixture of polyvinylpyrrolidone K30, polyvinylpyrrolidone K60 and polyvinylpyrrolidone K90, and the polyvinylpyrrolidone K30 is a mixture of polyvinylpyrrolidone K60 and polyvinylpyrrolidone K90. The biological glue has good biocompatibility and high-strength adhesiveness.

Disclosed is a method for producing an anti-adhesion film. The method for producing an anti-adhesion film may include: a discharge step of separately electrospinning a biodegradable polymer solution filled in a first syringe and a crosslinking agent solution filled in a second syringe; and a film forming step of forming an anti-adhesion film by crosslinking of the biodegradable polymer by contact between the biodegradable polymer solution discharged in the form of fibers in the discharge step and the crosslinking agent solution discharged in the form of droplets in the discharge step.

A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The negative electrode includes: a negative electrode current collector including a carbon layer and a silicon layer, the carbon layer including a first porous substrate and a carbon-based material present inside the first porous substrate, and the silicon layer including a second porous substrate and a silicon-based negative electrode active material present inside the second porous substrate; and a negative electrode active material layer disposed on a surface of the negative electrode current collector and including a negative electrode active material.

The invention belongs to the technical field of copper ore beneficiation, and particularly relates to a method for improving the flotation separation efficiency of micro-fine particle malachite. The method for improving the flotation separation efficiency of the micro-fine particle malachite comprises the following steps that quartz ore powder, malachite ore powder and water are mixed according to the mass ratio of 5: 1: (15-40), and first ore pulp is obtained; and a collecting agent is added into the first ore pulp, the final concentration of the collecting agent is made to range from 50 mg / L to 240 mg / L, and second ore pulp is obtained. Inorganic acid is added into the second ore pulp, flotation is conducted, and copper concentrate is obtained. Wherein the collecting agent is obtained by mixing a mixture of fatty acid, fatty alcohol-polyoxyethylene ether and polyethylene glycol according to the mass ratio of (70-82): (2-10): (8-28). The inorganic acid is selected from any one of sulfuric acid, hydrochloric acid and nitric acid. The mass concentration of the inorganic acid is 5%-25%, and 0.1 mL-0. 7mL of the inorganic acid is added into each liter of ore pulp. According to the method, the separation efficiency of the micro-fine particle malachite and the quartz is remarkably improved, and the copper recovery rate of the copper concentrate reaches 85.14%-86.6%.

The invention relates to a cell grid line transfer printing device and method. The device comprises an unwinding assembly and a winding assembly and is used for conveying the patterned transfer printing film. The visual inspection assembly is used for acquiring position information of the film and the battery piece; a carrying platform of the pasting bearing platform is used for bearing the battery piece and is driven by a first moving part to realize horizontal movement and movement perpendicular to a film surface so as to finish alignment and pasting; and the pressing roller assembly comprises a heating roller, a first temperature control part used for accurately controlling the temperature and a pressure adjusting part used for adjusting the pressure so as to complete hot pressing transfer printing. The device can also comprise a movable heating plate for preheating the film, a carrying table temperature control part for preheating the battery piece, and a vacuum adsorption and liftable carrying table for fixing the battery piece. The corresponding method comprises the steps of battery piece feeding and alignment, vertical attachment, heating and rolling and base film removal, and can comprise the step of preliminary pressing, and the alignment precision, the hot-pressing uniformity and the production efficiency of transfer printing can be improved.

This invention discloses a surgical anti-adhesion biopolysaccharide irrigation solution and its preparation method, which is prepared from the following raw materials in parts by weight: 5-30 parts of sodium carboxymethyl cellulose, 0.1-5 parts of polyethylene oxide with a molecular weight of 1.5 million to 2 million Daltons, 2-16 parts of sodium hyaluronate with a molecular weight of 1.2 million to 2 million Daltons, and 80-100 parts of water for injection. The preparation method includes alkalization of natural plant fibers, carboxymethylation modification of natural plant fibers, dissolution and mixing of the anti-adhesion solution, emulsification treatment, and sterilization and filling. High-purity sodium carboxymethyl cellulose is prepared from natural plant fibers through a modification process, serving as the basic framework of the adhesive solution. In vivo, it can remain incompletely degraded during the adhesion cycle, ensuring the stability of the physical barrier. Sodium hyaluronate with a molecular weight suitable for anti-adhesion effect and polyethylene oxide that increases the strength and adhesion of the irrigation solution are screened to form a synergistic system with sodium carboxymethyl cellulose that degrades synchronously and has complementary strength.

The application discloses a high-temperature high-power hybrid integrated device and a packaging method thereof, and belongs to the technical field of integrated circuits. The device comprises a circuit module (1) and a heat storage unit box body (2) provided with an inner cavity. A recess (21) is arranged on the surface of the heat storage unit box body (2), the circuit module (1) is fixedly connected in the recess (21), the circuit module (1) is in contact with the heat storage unit box body (2) to form heat conduction, a first filling body (3) composed of phase change heat storage materials is arranged in the heat storage unit box body (2), and a heat insulation layer (6) is arranged on the outer surface of the heat storage unit box body (2). The application effectively improves the heat dissipation capacity and high-temperature resistance of the circuit module, simultaneously reduces the temperature of internal components of the circuit, enables the circuit to normally work in the case that components and materials with a rated working temperature lower than an ambient temperature are adopted, and avoids the adoption of valuable high-temperature components and materials, so that the economic cost of the circuit module is reduced as a whole.

A dental adhesive composition including: a (meth)acrylate having an acid group; and a linear siloxane represented by a general formula (1). In the general formula (1), X1 to X6 are independently an alkyl group or an ethylenically unsaturated group having 1 or more and 6 or less carbon atoms; m is an integer of 0 or more and 500 or less; in a case where m is 2 or more, X3 and X4 are same or different for each repeating unit; Y1 and Y2 are independently a linear hydrocarbon group or a branched hydrocarbon group having 1 or more and 20 or less carbon atoms having an ether bond or having no ether bond; Z1 to Z4 are independently hydrogen atom or an ethylenically unsaturated group; and at least one of X1 to X6 or Z1 to Z4 is an ethylenically unsaturated group.

The invention relates to the technical field of alloy surface coating, in particular to a high-adhesion diamond-like film coating method. The high-adhesion diamond-like film coating method comprises the following steps that an alloy base material is subjected to ultrasonic cleaning and drying, heat preservation is conducted for 1-2 h at the temperature of 160-200 DEG C in a vacuum state, plasma cleaning is conducted for 10-30 min under argon protection, and pretreated alloy is obtained; taking titanium as a target material, carrying out magnetron sputtering on the surface of the pretreated alloy to form a bottom layer, then respectively taking titanium carbide and chromium as target materials, and simultaneously carrying out magnetron sputtering on the surface of the bottom layer to form a deposition layer; keeping the vacuum degree in the vacuum cavity to be 0.2-0.6 Pa, introducing acetylene gas into the vacuum cavity, and forming a pre-deposited diamond-like carbon layer on the surface of the deposited layer by adopting an anode ion beam technology; and then the diamond-like carbon layer is placed in a filtered cathode vacuum arc device, graphite serves as a cathode target material, and the diamond-like carbon layer is formed under the conditions that the air pressure is 0.2-0.6 Pa, the current is 50-70 A and the vacuum negative bias voltage is 60-100 V.

The present invention relates to a surface-modifying layer including a polymeric component having a hydroxyl group and an unsaturated hydrocarbon group, in which a molar ratio of the unsaturated hydrocarbon group to the hydroxyl group is 0.01 or more and less than 1, a surface-modifying sheet including the surface-modifying layer and a release sheet, a laminate, a surface-modified member and a coated article, in which the surface-modifying sheet is used, a method for producing a surface-modified member, and a method for producing a coated article.

The present disclosure provides a separator for a lithium secondary battery, including a porous polymer substrate; and an inorganic coating layer present on at least one surface of the porous polymer substrate, the inorganic coating layer including a core-shell composite particle precursor, where the core-shell composite particle precursor includes a core portion and a shell portion covering at least a portion of a surface of the core portion, where the core portion includes inorganic particles, and where the shell portion includes an acrylic monomer or oligomer.

The utility model relates to the technical field of aluminum alloy sections, in particular to a high-strength aluminum alloy section for a combined energy-saving curtain wall, which comprises a stand column, a plurality of rib columns distributed at equal intervals are arranged on the inner side of the stand column, and ribs are arranged on the periphery of each rib column. The cross beams are located on the front side and the rear side of the stand column, fixing cylinders are arranged on the inner sides of the cross beams, and reinforcing fins are fixedly connected between the peripheries of the outer surfaces of the fixing cylinders and the inner walls of the cross beams. Under the action of the rib columns, the ribs and the honeycomb fiber braid layer, the aluminum alloy profile has the advantages of high strength and large bearing load, and the problem that the aluminum alloy profile for the combined energy-saving curtain wall possibly has insufficient strength in certain specific application scenes is solved; in particular, in a large-span, high-wind-pressure or complex-modeling curtain wall system, most traditional aluminum alloy sections are designed into single cavities, and deformation is prone to occurring when large loads are borne.

A photoelectric conversion element includes: a back electrode layer formed on a substrate; a photoelectric conversion layer facing a light receiving surface side of the back electrode layer and containing a chalcogen semiconductor; and a current collector electrically connected to the light receiving surface side of the photoelectric conversion layer, in which a first region including an interface between the back electrode layer and the photoelectric conversion layer and a second region not including an interface between the back electrode layer and the photoelectric conversion layer are provided on the substrate, and a joined portion between the current collector and a wiring member is formed in the second region.

The application relates to the technical field of electroplating, and discloses a chromium electroplating process for improving the hardness of a connector terminal, which comprises the following steps: performing surface pretreatment on the connector terminal, removing surface impurities through ultrasonic cleaning and micro-etching treatment; performing heating treatment on the connector terminal; performing electroplating treatment on the connector terminal by using an electroplating solution comprising trivalent chromium salt, boron nitride nanoparticles, ferroferric oxide nanoparticles, nickel ions, sodium dichromate and chromium alloy additives, so as to form a chromium plating layer; performing passivation treatment on the plating layer; performing low-temperature treatment on the plating layer; and spraying a protective layer on the chromium plating layer. Through the trivalent chromium salt and the sodium dichromate, the trivalent chromium salt is used to reduce hexavalent chromium ions into trivalent chromium, the toxicity of the hexavalent chromium is reduced, the sodium dichromate is used to provide a stable chromium source, the deposition of chromium elements in the electroplating process is ensured, the pollution of hexavalent chromium to the environment and the harm of hexavalent chromium to the health of operators are solved, and the environmental protection and safety of the electroplating process are improved.

A polyester film according to one embodiment has improved thermal properties and chemical properties by controlling the crystallinity of a copolymerized polyester and, particularly, exhibits excellent shrinkage per unit temperature as well as adhesiveness by means of a solvent, and thus is suitable for a heat-shrinking process and a seaming process. Therefore, the polyester film according to said embodiment can be usefully applied, as a heat-shrinkable label or packaging material, to containers of various products comprising drinks or food.

The utility model discloses a metal multilayer structure capable of reducing stress influence. The metal multilayer structure comprises a first metal layer and a second metal layer which are arranged adjacently. A metal transition layer is arranged between the first metal layer and the second metal layer; the metal transition layer comprises a first transition layer, a second transition layer, a third transition layer and a fourth transition layer which are sequentially arranged between the first metal layer and the second metal layer; the first transition layer and the third transition layer are made of the same material as the first metal layer; and the second transition layer and the fourth transition layer are made of the same material as the second metal layer. According to the invention, the metal transition layer which is of a sandwich layer structure and is formed by alternating two metals is arranged between the two layers of metal structures, so that the adhesion between the metal layers can be greatly improved, and the stress of a metal connection interface is reduced.

The application discloses an electrode for electric spark machining of a micro-hole with a large depth-diameter ratio and a preparation method thereof, and belongs to the technical field of tool electrode preparation. The electrode comprises a tungsten wire rod, and the diameter of the tungsten wire rod is 0.1-0.4 mm. The tungsten wire rod is characterized in that a uniform and stable zirconium oxide insulation layer is arranged on the peripheral wall of the tungsten wire rod. The electrode selects the stable zirconium oxide layer as the insulation layer, which can enhance the insulation property of the peripheral wall of the electrode. On one hand, the electrode can reduce the discharge removal between the peripheral wall of the electrode and the side wall of the hole in the electric spark machining process, thereby improving the forming precision of the micro-hole. On the other hand, the electrode can reduce the skin effect of the current in the electrode and increase the current density of the center of the end surface of the electrode. Meanwhile, the end surface of the insulation layer has the conductivity in the electric spark discharge, electric spark discharge is generated to remove the material, and the electric spark machining efficiency is improved.

The present application relates to a kind of RB-SiC surface femtosecond laser modification pretreatment method, by femtosecond laser to the preset Si powder on RB-SiC surface is modified and handled, to improve the polishing efficiency of RB-SiC surface.The present application can directly carry out surface modification to the cutting surface of RB-SiC, Si powder prepositioned on the surface of RB-SiC is rapidly oxidized under the action of the high peak power of femtosecond laser, and with the deepening of the depth of oxidation, so that the modified layer after oxidation forms bonding with RB-SiC matrix, obtains a modified coating with high adhesion strength, high quality.The method has the advantages of simple operation, low requirement to RB-SiC matrix and working environment, can be directly carried out in air, etc., can be applied to the surface modification of RB-SiC with complex surface shape, can significantly improve its polishing efficiency.

The invention discloses food paper based on plant fibers and PLA (polylactic acid) lamination and a preparation method of the food paper, and belongs to the technical field of polylactic acid lamination papers.Acrylate monomers and organic silicon modified alkyl acrylate containing flexible chain segments are subjected to in-situ polymerization on TEMPO oxidized nano-cellulose under a controllable catalytic system, so that the food paper is obtained; the preparation method comprises the following steps: polymerizing a cellulose skeleton, anchoring a polymerized chain segment on the cellulose skeleton in a chemical manner, constructing an organic interface layer with certain flexibility on the surface of nano-cellulose to obtain a modified nano-cellulose filler with a stable structure, blending the modified nano-cellulose with polylactic acid to prepare a film spraying master batch, and combining the film spraying master batch with plant cellulose base paper through a film spraying process to prepare the plant cellulose composite film. The preparation method is simple and easy to operate, the food paper which is compact in lamination and uniform in attachment is obtained, stable attachment of the paper base and the PLA lamination is achieved while the bio-based and degradable characteristics of the material are kept, interface defects and delamination risks are reduced, the mechanical property and use reliability of the food paper are improved, and the food paper is suitable for food packaging application.

The application belongs to the technical field of textile fabric functional finishing, and particularly relates to a preparation method of super-hydrophobic fabric. The preparation method of the super-hydrophobic fabric comprises the following steps: pretreating cotton fabric by using a zinc ion mixed solution of sodium hydroxide to obtain cotton fabric containing a zinc oxide seed layer; then immersing the cotton fabric containing the zinc oxide seed layer in a mixed solution of a zinc nitrate aqueous solution and a hexamethylenetetramine aqueous solution to obtain a ZnO composite fabric; and finally using the bridging effect of a mercapto silane coupling agent to bond low-surface-energy polydimethylsiloxane and octavinyl octasilsesquioxane to the cotton fabric to obtain the super-hydrophobic fabric. The above method can endow the fabric with excellent hydrophobicity and improve the washing resistance of the hydrophobic effect.

[Problem] To provide a curable silicone composition or the like having excellent handleability and curing properties during sealing due to good hot-melt properties and excellent melting properties, in addition to having excellent cured product mechanical strength and substrate bonding strength, making the composition suitable as a sealant for semiconductor devices. [Solution] Provided is a curable silicone composition comprising: (A) a hot-melt MDT-type organopolysiloxane resin having a specific siloxane unit ratio; (B) an organohydrogensiloxane compound; (C) a hydrosilylation catalyst; and (D) a functional inorganic filler in an amount of 400 to 3,000 parts by mass per 100 parts by mass of the total of components (A) to (C), wherein the curable silicone composition is solid at 25°C and has hot-melt properties at a temperature of 200°C or lower, along with the use thereof.

The invention discloses a low-foam low-glass-transition-temperature water-based adhesive and a preparation method thereof, relates to the technical field of water-based adhesives, and can solve the problems that the existing water-based adhesive is high in production cost, more in generated foam and unstable in performance, so that the stripping force is increased. According to the water-based adhesive, a proper amount of the defoaming agent is added in the preparation process, foam generation can be effectively reduced, it is guaranteed that in the application process of the adhesive, the bonding effect and the use experience of the adhesive cannot be affected due to the foam problem, and the adhesive performance of the adhesive is enhanced through the proportion design of butyl acrylate and acrylic acid. Butyl acrylate is used as a main polymeric monomer and can effectively improve the flexibility and adhesion strength of the adhesive, acrylic acid is beneficial to enhancing the crosslinking and stability of an adhesive layer and improving the durability, and due to the low foaming property, the low glass transition temperature and the good emulsification effect, the water-based adhesive can be applied to adhesion of various materials, and the water-based adhesive has the good application prospect. Such as effective adhesion to substrates.

The utility model discloses a high slope collapse prevention supporting device which comprises a bottom plate, a sliding hole is formed in the outer wall of the bottom plate, a plurality of inserting holes are formed in the top end of the bottom plate, the outer wall of the bottom plate is connected with a connecting block, the outer wall of the connecting block is rotationally connected with a first rotating shaft, and the outer wall of the first rotating shaft is connected with a baffle. The inserting rod is inserted into the through hole and the inserting hole, the inserting rod can be conveniently inserted into the deep position in the ground through the bottom cone, so that the sliding block and the bottom plate are fixed, the contact area of the inserting rod and soil can be increased through the square groove, the adhesion effect of the soil on the inserting rod is improved, and water can be poured into the top end of the through pipe; and water can flow along the through pipe and permeate into soil on the peripheries of the bottom cone and the inserting rod, so that the humidity of the soil is improved, the adhesion strength of the soil to the inserting rod is improved, the adhesion and fixing effect of the soil to the inserting rod is improved, stable fixing of the bottom plate and the sliding block is ensured, and then the fixing and supporting strength of the baffle is improved.

The present invention relates to a method for manufacturing an electrode, the method comprising the steps of: applying an electrode-forming slurry on at least one surface of a current collector; and calendering the current collector coated with the electrode-forming slurry, in which the electrode-forming slurry contains an electrode active material and an electrode binder, in which the electrode binder contains an acrylic binder, and in which the calendering is performed at a temperature of 105 DEG C or more, whereby in electrode manufacturing using the aqueous binder, the electrode-forming slurry is coated with the electrode-forming slurry, and the electrode-forming slurry is coated with the electrode-forming slurry. An electrode having a low moisture content is manufactured by using a rolling process.