420 results about "Adhesion strength" patented technology

The invention relates to a four-degree-of-freedom icing adhesion strength testing device and a testing method. The testing device comprises a fixed platform, and a refrigerating and freezing module and a four-degree-of-freedom motion testing module which are arranged on the fixed platform. The fixed platform comprises a flat plate and a height-adjustable telescopic rod. The refrigerating and freezing module comprises a refrigerating platform, a refrigerating plate inclination angle assembly and at least one ice making mold. The four-degree-of-freedom motion test module comprises a Z-axis moving sliding table, a Y-axis rotating inclination angle assembly, an X-axis moving sliding table, a Y-axis moving sliding table, a pull and push dynamometer clamp and a pull and push dynamometer; the pull and push dynamometer can drive ice blocks in the ice making mold to be separated from a test sample under the driving of the Z-axis moving sliding table, the Y-axis rotating dip angle assembly, the X-axis moving sliding table and the Y-axis moving sliding table. Compared with the prior art, the device has the advantages of high experiment efficiency, wide measurement range, adjustable experiment parameters, diversified measurement modes and the like.

The invention provides a single-component modified silane adhesive as well as a preparation method and application thereof. The adhesive is prepared by mixing the following components: silane modified polyether resin, silane modified polymer resin, a plasticizer, a composite light stabilizer, a filler, a rheological additive, a water removal agent, a coupling agent and a catalyst, the silane modified polyether resin is silane-terminated resin prepared by a hydrosilylation method; the silane-modified polymer resin is a silane-terminated polymer resin containing a urethane bond. The adhesive is excellent in comprehensive performance, the tensile strength of a body is larger than 3 MPa, the elongation at break is larger than 450%, the adhesive is high in adhesion universality to metal base materials, PET films, ceramics, glass, wood floors, PVC, PC, ABS, wood-plastic composite materials and paint faces, the base materials do not need to be specially treated, the damage form is cohesive failure, and the adhesive has good adhesion strength, tear resistance and excellent temperature resistance and is suitable for being applied to the field of wood products. After aging at 120 DEG C for one week, the tensile strength of the body is greater than 3 MPa, the elongation at break is greater than 430%, and the surface layer can be coated after curing.

The invention discloses a laser cleaning method and system for residual sand of a sand casting mold, and the method comprises the steps: S1, obtaining point cloud data of the surface of the mold through a three-dimensional scanner, reconstructing a triangular mesh model M (V, E, F) of the surface of the mold, V being a vertex set, E being an edge set, and F being a surface set; s2, based on the triangular mesh model, a laser cleaning path is planned; S3, a laser head is controlled to move along the path, and laser is emitted to remove residual sand; according to the method, the residence time calculation model is introduced, the laser residence time is dynamically set by combining the region area, the material removal difficulty coefficient and the characteristic parameters, the adhesion strength signal of the surface of the mold under the laser action is detected in real time through the acoustic emission sensor, error feedback is formed, the laser power, the pulse frequency and the residence time are dynamically adjusted, and the mold surface quality is improved. And the self-adaptive response to the thickness and the adhesion strength of the residual sand in different areas is realized.

The invention relates to the technical field of adhesives, and discloses an imidazolium ionic liquid and a preparation method and application thereof, the preparation method comprises the following steps: reacting omega-bromoalcohol with 1-(methoxymethyl) imidazole in acetonitrile, and washing with methyl tert-butyl ether to obtain a target ionic liquid precursor; and dissolving the product in acetonitrile, adding 4-trifluoromethyl phenyl isocyanate, and washing with methyl tert-butyl ether after the reaction is finished, thereby obtaining the target imidazolium ionic liquid. The imidazolium ionic liquid disclosed by the invention is applied to a PVB (Polyvinyl Butyral) adhesive, and the PVB adhesive shows excellent adhesion strength in a macroscopic adhesion performance test on the basis of multiple interactions, and particularly has excellent adhesion strength on aluminum. The obtained adhesive can be universally adapted to various substrates such as metal substrates and macromolecule substrates, and finally high-strength and high-durability intelligent adhesion performance is achieved.

The invention provides a seawater soaking wound hydrogel dressing and a preparation method thereof, a drug-loaded nano system 4OI (at) ZIF-8 (at) PAD with a core-shell structure is constructed, an anti-inflammatory drug 4-octyl itaconic acid and zinc ions are jointly encapsulated in a ZIF-8 framework, and a polydopamine coating is wrapped, so that synergistic loading and controllable release of the drug and metal ions are realized. According to the dressing, dopamine modified hyaluronic acid is used as a matrix, a temperature-sensitive material and an enzyme catalysis cross-linking system are combined, stable gel can be rapidly formed in situ within 5 seconds, and the dressing has excellent tissue adhesion performance (the adhesion strength reaches 6.7 kPa). Experiments prove that the hydrogel dressing has the characteristics of broad-spectrum antibiosis, inflammation regulation and control and long-acting release. Animal experiments prove that the healing rate of seawater soaking wounds treated by the dressing on the twelfth day is as high as 95.7% and is remarkably superior to that of a commercial silver ion gel control group, scars are less after healing, and an efficient, safe and easy-to-implement scheme is provided for marine environment wound nursing.

The application belongs to the technical field of polymer materials, and proposes a high-adhesion-strength flame-retardant waterproof composite board for tunnels and a preparation method and application thereof, which comprises: a, a waterproof board layer, raw materials of which include a flame retardant A; b, a polyurethane layer, which is sprayed on the surface of the waterproof board layer and is prepared from polyols and isocyanate at an isocyanate index R=1-1.1, wherein the polyols include a chain extender, a foaming agent, a foam stabilizer, a catalyst, a polyether polyol, water and a flame retardant B; wherein the flame retardant A is microencapsulated red phosphorus modified by vinyl triethoxysilane, and the flame retardant B is microencapsulated red phosphorus modified by γ-aminopropyl triethoxysilane. Through the above technical scheme, the problem of poor adhesion strength between the waterproof board and the polyurethane in the composite board and poor flame-retardant performance of the waterproof composite board in the prior art is solved.

The invention concerns a composition comprising a fluoropolymer, a silicon-sulfur compound, a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, and a solvent or a mixture of solvents and methods for the preparation thereof and for preparing a coated substrate by applying said composition.

The invention discloses an epoxy composite coating with radiation attenuation performance and a preparation method thereof. The preparation process of the composite coating comprises the following steps: firstly, preparing a core-shell structure anti-radiation filler of a silicon dioxide shell layer through auxiliary ball milling of tetraethoxysilane, and then preparing a modified anti-radiation filler through further surface treatment of gamma-aminopropyltriethoxysilane (KH550); and finally, mixing the modified filler with epoxy resin to obtain the epoxy composite coating with the radiation shielding performance. The prepared composite coating has good thermal stability and adhesive strength, has excellent X / gamma ray attenuation performance and can be used for radiation attenuation of the surface of metal equipment.

The invention relates to a measuring device (22) for inline measurement of the adhesion strength of a coating (16) of an electrode (12), comprising two deflecting rollers (28) and a measuring roller (30), which are aligned with their respective central axes parallel to each other, wherein the measuring roller (30) is configured to be moved in a lateral direction (32) perpendicular to a longitudinal extension direction of the central axes relative to the deflecting rollers (28), wherein the deflecting rollers (28) are configured to be positioned against the same side of the electrode (12) and the measuring roller (30) is configured to be positioned against the other side of the electrode (12), whereby by moving the measuring roller (30) the electrode (12) can be positioned around the measuring roller (30), whereby the electrode (12) has a bend in a test area defined by a radius of the measuring roller (30), and comprising an optical defect detection device (34).which is designed to optically detect and evaluate the area of ​​the electrode (12) to be tested.

The invention concerns a monolayer comprising a fluoropolymer, a silicon-sulfur compound, and a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, an assembly comprising a substrate and said monolayer, a method for preparing said monolayer, a component comprising said monolayer and a device comprising said component.

The application discloses a graphene-diamond composite coating and a preparation method and application thereof, and belongs to the technical field of materials. The graphene-diamond composite coating comprises a diamond coating and a graphene coating; graphene sp2 bond structure is covalently combined with diamond sp3 bond structure; and the graphene coating has a graphene structure with non-parallel growth mainly in a vertical direction. The graphene-diamond composite coating has small lattice mismatch between the diamond and the graphene, avoids volume expansion caused in a friction heat process, and has the advantages that the diamond coating can provide a support layer for the graphene, forms super-strong C-C covalent bonds at an interface, and significantly improves the adhesion strength of the graphene; the graphene can avoid brittle fracture of the diamond, and significantly improves the lubricating performance of the surface of the diamond coating. The composite coating has better wear resistance, a low friction coefficient and excellent oxidation resistance, and can remain stable under high-temperature and high-load working conditions, so that the service life and processing efficiency of wear-resistant parts are improved.

The invention relates to the technical field of high polymer materials, and discloses a furyl polyurethane adhesive and a synthesis method thereof, polymer polyol is used as a soft segment, isocyanate and two specific furyl chain extenders are used as hard segments, polymerization is performed through a one-step method, and the method has the advantages of simple process, short flow, mild reaction conditions and the like. Wherein a furan ring and an amide group of the two specific furyl chain extenders endow the material with rigidity and excellent bonding performance, and form a high-density hydrogen bond network with a hydrazide group, so that the mechanical strength, the toughness and the bonding performance of the material are remarkably improved. By regulating and controlling the proportion of the components, the rigidity and flexibility of the material can be effectively balanced, so that the polyurethane adhesive with excellent comprehensive performance is prepared. The furyl polyurethane adhesive prepared by the invention has relatively high adhesion strength and mechanical strength, and can be applied to the fields of buildings, automobile manufacturing, medical treatment, packaging, aerospace, electronics and the like.

The present invention provides a joint structure for structural members that can reduce component costs and increase axial adhesion strength. [Solution] The joining structure for a pair of frame members (column body members 4-4) arranged in a straight line comprises a concrete connecting block 5 placed between the pair of frame members (4-4), a plurality of metal connecting rods 7 having an embedded intermediate portion 7a embedded in the connecting block 5 so as to penetrate the connecting block 5, and a pair of extended ends 7b with male threads 8 extending in both directions from the connecting block 5 to connect the frame members (4-4), and an adhesion force enhancing portion (nut 9) provided on each of the connecting rods 7 to enhance the axial adhesion strength to the connecting block 5.

The present invention provides a two-component composition that suppresses dripping during spray application, has high thermal insulation properties, excellent smoothness, and high interlayer adhesion strength for spray-applied polyurethane foam roofing. [Solution] A two-component composition for spray-applied polyurethane foam for roofs, comprising: liquid A containing a polyol, a catalyst, and a blowing agent; and liquid B containing an isocyanate compound, wherein the catalyst includes a foaming catalyst and a resinification catalyst (excluding a metal catalyst), and the blowing agent includes a hydrochlorofluoroolefin and does not include the metal catalyst which is the resinification catalyst, or a trimerizing catalyst.

The present application relates to the field of medical tissue adhesive, in particular to a medical tissue adhesive, a medical tissue dry adhesive patch and a preparation method and application thereof. The present application provides a medical tissue adhesive, a medical tissue dry adhesive patch and a preparation method and application thereof. The medical tissue adhesive provided by the present application comprises: 1wt%-30wt% of acidic polyglutamic acid; 1wt%-30wt% of spherical protein; and the balance of water. The medical tissue adhesive provided by the present application has high tissue adhesion strength and fast hemostatic sealing speed in a wet physiological environment, meets the requirements of rapid and efficient tissue hemostatic sealing, and can be applied to rapid hemostasis of tissue wounds in a wet physiological environment, sealing of wound liquid leakage, healing and repair of wound tissue, and antibacterial of wounds. Experiments show that the dry adhesive patch made of the adhesive provided by the present application has high tissue adhesion strength in a wet physiological environment, and the adhesion strength to a wet pigskin tissue can reach more than 60kPa.

The invention discloses an ice adhesion strength measuring device and an ice adhesion strength measuring method, and belongs to the technical field of ice adhesion strength measurement. The measuring device comprises an inner arc guide rail, an outer arc guide rail, an icing mold, an action line, a tension sensor, a first movable part, a second movable part and a steering part. The inner arc guide rail is coaxially sleeved with the outer arc guide rail, the icing mold is fixedly connected with the inner arc guide rail and provided with an icing cavity, the icing cavity can make contact with the surface of a sample to be tested, the first movable part is movably installed on the inner arc guide rail, the second movable part is movably installed on the outer arc guide rail, and the steering part is fixedly arranged. One end of the action line is fixed on the first movable part, and the other end is wound on the second movable part and the steering part and connected with the tension sensor; the first movable part can be driven by the action line to move along the inner arc guide rail. The ice adhesion strength at any angle is measured by adjusting the position of the action line, and the measurable angle range of the ice adhesion strength is expanded.

The utility model provides a polar plate lead plaster adhesive strength testing device which comprises a main body frame, a polar plate releasing device is arranged at the upper end of the main body frame and comprises a mounting bottom plate, and an air cylinder connecting plate is fixedly connected to the middle of the upper end of the mounting bottom plate. The side wall of the air cylinder connecting plate is fixedly connected with a pneumatic finger, two clamping jaws of the pneumatic finger are fixedly connected with reset buckle mounting blocks, reset buckles and pin shafts are arranged on the reset buckle mounting blocks, and rotating shafts are rotationally arranged on the two sides of the lower portion of the mounting bottom plate. The side wall of the rotating shaft is fixedly connected with a bearing plate and a rotating shaft limiting block, one end of the rotating shaft limiting block is in lap joint with the edge of the reset buckle, and a tension spring is arranged in the middle of the rotating shaft limiting block. The device is suitable for testing polar plates with different sizes and weights.

Provided is a curable silicone composition that can form a cured product having good adhesion strength to a substrate made of polyphenylene. The curable silicone composition of the present disclosure comprises (A) an organopolysiloxane having at least two alkenyl groups per molecule, (B) an organopolysiloxane having an average of two or more silicone atom-bonded hydrogen atoms per molecule and free of alkenyl groups, (C) an α-silane compound having a specific chemical structure, and (D) a curing catalyst.

The present disclosure relates to a surface acoustic wave (SAW) device with robust metal structures, which at least provide electrically low resistance and mechanically strong connections between different inter digital transducers (IDTs) within the SAW device. Each metal structure includes a metal base section that is formed from a same metal layer as corresponding IDTs, and a metal stack over the metal base section. The metal stack includes a bottom adhesive layer over the metal base section, a bottom conductive layer over the bottom adhesive layer, an intermediate adhesive layer over the bottom conductive layer, a top conductive layer over the intermediate adhesive layer, and a top adhesive layer over the top conductive layer. The bottom and top conductive layers have a higher electrical conductivity than each adhesive layer, while each adhesive layer has a stronger adhesion strength than the bottom and top conductive layers.

The utility model provides a kind of recyclable thermoplastic resin matrix SMC material structural member, it solves the problem of insufficient resin matrix adhesion strength etc., it includes recyclable thermoplastic SMC mould pressing forming upper panel and lower panel, the opposite side of upper panel and lower panel is distributed with adhesion grid and the other side is smooth plane, the adhesion grid of upper panel and lower panel is fixed with the core material of PP material by hot pressing, and the core material adopts honeycomb structure.The utility model has the advantages of high bonding strength, good structural performance etc.

The invention relates to the technical field of coatings, in particular to a graphene modified polyurethane coating with an electromagnetic shielding function. The coating is composed of deionized water, a graphene modified polyurethane emulsion, silver nanoparticles and an auxiliary agent, a synergistic modification system of hydroxylated graphene and p-hydroxybenzoic acid is introduced in a polyurethane prepolymerization stage, an organic-inorganic synergistic network with good interface compatibility is formed, the conductivity and electromagnetic shielding effect of the coating are remarkably improved through a formed compact conductive path, and meanwhile the flexibility and adhesive strength of polyurethane are kept. The coating is compact in structure, high in adhesive force, good in conductive continuity and excellent in electromagnetic shielding effect, and can be widely applied to the field of electromagnetic protection of electronic equipment shells, communication devices and aerospace equipment.

The present application belongs to the technical field of polymer adhesive material, and particularly relates to a resin composition for bonding polyolefin material and a preparation method thereof. The present application is prepared by formula screening optimization, and the ratio of the storage modulus E'30 at 30 DEG C to the storage modulus E'130 at 130 DEG C is greater than 100. The polyurethane resin is used in combination with butadiene-styrene copolymer with butadiene content greater than 60% and butadiene-styrene-vinylpyridine copolymer, so that the adhesive with good fusion and good adhesion to polyethylene base material is obtained. The allyl silicon modified pyridine monomer, allyl silicon modified carbazole monomer and lauryl acrylate are polymerized, and the prepared acrylate polymer is used in combination with the polyurethane resin. The pyridine group, tertiary butyl group, carbazole group and silicon atom in the acrylate polymer and the dodecyl group in the lauryl acrylate are used to improve the adhesion strength to the polyolefin base material.

Provided is a ceramic plate in which the adhesion strength between a ceramic substrate and an internal electrode is improved. This ceramic plate is provided with: a ceramic substrate containing aluminum oxide and / or aluminum nitride; and an internal electrode that contains an electrode base material, a coefficient of thermal expansion adjusting material, and Ti and is implanted in the ceramic substrate, the ceramic substrate having a Ti diffusion region in which Ti diffuses around the internal electrode.

The application provides a white clover surface with super-low ice adhesion strength and a preparation method thereof, which comprises analyzing the relationship between the white clover surface structure and the super-hydrophobic cold resistance; copying the white clover surface structure, and processing periodic micropores on a base material by means of femtosecond laser direct writing; boiling the surface of the periodic micropores; and fluorinating the surface to modify it into a functional surface with super-hydrophobicity. The white clover surface with super-low ice adhesion strength has a micro-nano hierarchical structure, which comprises closely arranged larger micrometer-level periodic pore structures, smaller micrometer-level granular particles dispersedly distributed on the surface of the micropore structures, and densely distributed sub-micrometer-level sheet structures on the surface. The surface has super-hydrophobic low adhesion, the ice adhesion strength is as low as 1.08 kPa, the static icing prolonging time can reach 4 h, the dynamic frost prevention capacity can last for 5 h in a low-temperature and high-humidity environment, and the surface has good wear resistance and reusability.

This application provides a rubber composition for stator lining and a motor assembly, relating to the field of rubber material technology. The rubber composition for stator lining, by weight, comprises: 100 parts of nitrile rubber, 10-14 parts of plasticizer, 60-70 parts of reinforcing component, 1-5 parts of silane coupling agent, and 10-15 parts of vulcanizing component; wherein, based on the weight of the nitrile rubber, the acrylonitrile content in the nitrile rubber is 30%-40%. The technical solution of this application can effectively solve the problems of insufficient adhesion strength and poor interfacial bonding stability between the stator lining layer and the metal housing in the prior art, which leads to cracking and delamination of the stator during use.

To provide a copper clad laminate and a method for manufacturing the same that enables high adhesion between low-dielectric resin film and copper plating layer and good volume resistivity while suppressing transmission loss when applied to flexible circuit boards.SOLUTION: A copper clad laminate according to the present invention includes: a low dielectric resin film with a relative permittivity of 3.5 or less and a dielectric loss tangent of 0.008 or less at a frequency of 10 GHz; and an electroless copper plating layer laminated on at least one surface of the low dielectric resin film, the weighted average size of crystallites in the electroless copper plating layer is 25 to 300 nm, and the adhesion strength between the resin film and the electroless copper plating layer is 4.2 N / cm or more.SELECTED DRAWING: Figure 1

This invention belongs to the field of biomedical materials technology, specifically disclosing a composite material for promoting the repair of soft tissue defects in the maxillofacial region and its preparation method. The composite material comprises the following raw materials: oxidized hyaluronic acid, carboxymethyl chitosan, dopamine-functionalized hydroxyapatite nanoparticles, strontium salt, copper salt, glycerol, and deionized water. The preparation method includes: firstly, strontium salt and copper salt are hierarchically loaded onto the surface of dopamine-functionalized hydroxyapatite nanoparticles via a dual mechanism of "lattice substitution-surface coordination," and then, together with oxidized hyaluronic acid and carboxymethyl chitosan, construct a "dynamic covalent-hydrogen bond-coordination bond" triple synergistic network through Schiff base reaction, hydrogen bonding, and coordination bonds. This invention solves the technical problems of poor wet surface adhesion, low mechanical strength, single function, and easy burst release of ions in existing repair materials, exhibiting excellent effects such as sequential antibacterial and repair-promoting properties, high adhesion strength, and long-lasting sustained release.

The utility model discloses a device for enhancing the bonding strength between layers of a white board. The device is characterized by further comprising a dynamic pressing mechanism arranged on a rack, after an adhesive is added to the paper layers of the white board paper through the coating device, bubbles retained in the adhesive are discharged by vibrating the paper layers through the arrangement of the eccentric wheel excitation device before a calendaring process, and meanwhile, the permeability of glue can be improved, so that the gluing quality between the paper layers is improved; the phenomena of bubbles, edge warping and the like after the paper layer is bonded are avoided; the pressure of the compression rollers is gradually increased one by one, the pressure of the first compression roller on the paper layer is minimum, and then the pressure is gradually increased one by one, so that the shear stress of the paper layer is reduced, and the uniformity of the adhesive layer is improved; therefore, the bonding strength between the paper layers is enhanced; the heating device is arranged on the pressing roller, heat is transmitted to the paper layer through the roller in the roller pressing process, rapid curing of glue is promoted, and therefore the production speed is increased.

The utility model relates to a kind of plating film layer stripping test devices, specifically a kind of film layer stripping strength testing device of plating product, including test bench, control panel and crossbeam support, the top of the test bench is provided with clamping table and support, the side of the support is equipped with the pressing station and support base for fixing one side of film layer, rotating shaft is rotatably installed on the support base, and rotating arm is arranged on the rotating shaft, cavity and slot are opened on the rotating arm, the utility model cooperates by transmission mechanism and screw thread adjusting mechanism, so that the fixture is extended outward in the process of rotating stripping, film layer can be straightened, curling of film layer can be prevented, uneven stress distribution, additional bending moment influence and other problems caused by curling are avoided, so as to improve the accuracy of stripping strength test, so that test result more truly reflects the real adhesion strength between film layer and substrate.

An adhesive force confirmation device (50) is a device for confirming the adhesive force of electrodes (20, 30) used for an electro-therapeutic apparatus (1), and is provided with a pasting part (60) capable of pasting an adhesive part of the electrodes (20, 30). The adhesive part (60) includes a reference surface (63) and active surfaces (61, 62) connected to the reference surface (63), and the active surfaces (61, 62) are configured such that, in a state in which the adhesive part is adhered, the side of the active surfaces (61, 62) that is farther from the reference surface (63) is easier to peel the adhesive part than the side of the active surfaces (61, 62) that is closer to the reference surface (63).