68 results about "Cohesive strength" patented technology

The present invention relates to the technical field of tackified adhesive films and specifically to a tackified adhesive film. The tackified adhesive film comprises a substrate layer and a UV-tackified adhesive layer applied onto the substrate layer. The UV-tackified adhesive layer is prepared by using a modified polyester resin, which is obtained by the graft polymerization of a hydroxyl-terminated polyester resin, butyl methacrylate, and isocyanatoethyl methacrylate, as a main resin and mixing the main resin with a tackifying resin, a photo-curing agent and the like. The UV-tackified adhesive layer has relatively high cohesive strength and relatively good adhesion to a PET substrate. Before a UV-induced tackification reaction, an initial peel force is not significantly increased with the extension of standing time, so that an adhesive tape can be easily removed without causing damage and contamination such as residual adhesive to an adherend . After the UV-induced tackification reaction, the modified polyester resin can improve the bonding strength between the adhesive tape and the adherend.

The invention relates to the technical field of polyurethane structural adhesives, in particular to a two-component polyurethane structural adhesive and a preparation method thereof. Comprising a component A and a component B. The component A comprises, by weight, 70-130 parts of polyether polyol, 1-5 parts of a chain extender, 5-10 parts of a flame retardant, 6-12 parts of a first dewatering agent, 3-5 parts of a thixotropic agent, 0.06-1 part of a catalyst and 110-200 parts of a modified heat-conducting filler. The component B is prepared from 70 to 130 parts of polyurethane prepolymer, 0.5 to 2 parts of second dewatering agent and 110 to 200 parts of modified heat-conducting filler; the technical problems that in the prior art, a polyurethane system adhesive is serious in cohesive strength attenuation under the working condition of 80 DEG C and low in high-temperature shear strength retention rate are solved by providing the double-component polyurethane structural adhesive.

This invention belongs to the field of ceramic composite material manufacturing technology, specifically relating to a method for preparing SiC composite materials based on cold spraying and silicon infiltration. SiC powder is prepared into a suspension, which is then deposited onto a substrate using a cold gas-powered spraying system to form a porous SiC preform coating. The preform coating undergoes post-curing to enhance its cohesive strength. Finally, melt silicon infiltration is performed, causing silicon to react with carbon in the preform to generate a new SiC phase that fills the pores, resulting in a high-density, high-performance SiC composite component. This method combines the advantages of low-temperature forming in cold spraying with silicon infiltration technology. The relatively low substrate temperature during cold spraying effectively avoids the adverse effects of high temperatures on the material structure, maintaining the stability of the original SiC phase. By adjusting the spraying parameters and matching the silicon infiltration process, the free silicon content and the distribution of the newly generated SiC phase in the composite material can be precisely controlled, further improving the material's density and mechanical properties.

This invention discloses a high-temperature resistant, low-growth, medium-to-low adhesion silicone pressure-sensitive adhesive, its preparation method, and its application. The silicone pressure-sensitive adhesive comprises the following components by weight: 25-30 parts of high-hydroxymethyl MQ silicone resin, 15-20 parts of hydroxyl-terminated polydimethylsiloxane, 1-5 parts of hydroxyl-terminated polydimethylsiloxane, 1-5 parts of vinylmethyl MQ silicone resin, 10-20 parts of vinyl-terminated polydimethylsiloxane, 30-40 parts of solvent, 0.02-0.08 parts of acid catalyst, and 0.2-0.5 parts of inhibitor. The silicone pressure-sensitive adhesive provided by this invention has high cohesive strength and low adhesion creep during high-temperature baking, enabling protection during the high-temperature baking process of glass. It achieves no white haze precipitation, no adhesive residue, and easy peeling after high-temperature baking.

The utility model discloses a kind of self-adhesive waterproof rolls, including main body pitch layer, the main body pitch layer lower end is fixedly installed with sticking device, the main body pitch layer upper end is fixedly installed with aluminium foil;The sticking device includes PE film, the PE film such as fixedly installed with several tear saw teeth, the PE film upper end is fixedly installed with modified pitch pressure-sensitive adhesive, the modified pitch pressure-sensitive adhesive upper end is fixedly installed with primer, the PE film is fixedly installed in the lower end of main body pitch layer by modified pitch pressure-sensitive adhesive and primer.The utility model can be soaked into main body pitch layer by primer, and then make modified pitch pressure-sensitive adhesive can be closely bonded with main body pitch layer, while modified pitch pressure-sensitive adhesive combines the high performance of modified pitch with the convenient construction characteristics of pressure-sensitive adhesive, pitch pressure-sensitive adhesive cohesive strength is high, material surface wettability is good, not only ultraviolet, high and low temperature and oxidation aging resistance, but also reduce the sensitivity to temperature.

This invention relates to the field of silicone pressure-sensitive adhesive technology, and provides a silicone pressure-sensitive adhesive composition and product suitable for paper coating. The composition comprises 100 parts by weight of vinyl-terminated polydimethylsiloxane A, 42-165 parts by weight of vinyl-terminated polydimethylsiloxane B, 2.5-22 parts by weight of vinyl-terminated polydimethylsiloxane C, 57-150 parts by weight of methyl MQ resin, 4-11 parts by weight of crosslinking agent, 1.5-4 parts by weight of anchoring agent, 0.3-0.8 parts by weight of inhibitor, 3.5-8 parts by weight of catalyst, and 70-155 parts by weight of solvent. The pressure-sensitive adhesive formed by this silicone pressure-sensitive adhesive composition has good cohesive strength, moderate viscosity, is easy to peel off, can be applied using conventional coating methods, and requires a low drying temperature, making it suitable for direct paper coating.

The invention discloses a composite adhesive for a reflective fabric material as well as a preparation method and application thereof. The composite adhesive comprises a polyurethane matrix, and the polyurethane matrix comprises a carboxylic acid monomer; the carboxylic acid monomer is hydroxy acid or binary acid and is used for introducing terminal carboxyl into a polyurethane molecular chain. Through the design, the excellent washing resistance of a polyurethane matrix is reserved, the binding strength with an aluminum-plated layer, a cloth base and glass beads is comprehensively improved through terminal carboxyl introduced by hydroxy acid or binary acid, and meanwhile, the crosslinking density and cohesive strength are enhanced. Compared with the prior art, the invention effectively solves the problems that the acrylic acid composite adhesive is poor in washing resistance and the folding part of the traditional polyurethane composite adhesive is easy to wear and delaminate, so that the reflective fabric can still keep higher retroreflection coefficient, smooth surface state and integrity of the folding part after being washed, dry-cleaned or industrially washed for many times; and the harsh use requirements of wearable reflective materials such as reflective clothing and the like are met.

The present application relates to the technical field of adhesive tape, in particular to the field of IPC B65H35, further to a high-temperature-resistant cutting adhesive tape and a preparation method thereof.From top to bottom, the high-temperature-resistant cutting adhesive tape comprises a protective layer, an adhesive layer and a substrate layer in sequence.The adhesive of the adhesive layer comprises the following raw materials in parts by mass: 70-90 parts of prepolymer, 20-50 parts of active diluent, 3-10 parts of photoinitiator, 1-4 parts of antioxidant and 3-6 parts of silane coupling agent.The present application selects to introduce bisphenol A epoxy acrylate and phenolic epoxy acrylate, and selects isobornyl acrylate and dipropylene glycol diacrylate to be used as the active diluent together, so that the cross-linking degree of the adhesive system is high, the system has a suitable curing shrinkage, the cohesive strength of the system is large, the high-temperature-resistant cutting adhesive tape has good bonding performance while the high-temperature-resistant performance is improved, and the prepared high-temperature-resistant cutting adhesive tape has excellent bonding performance and high-temperature-resistant performance.

The utility model discloses a kind of plant fiber polishing grinding wheel, including polishing grinding wheel, abrasive composite layer and fiber framework layer;The surface central position of polishing grinding wheel is provided with through-hole;Abrasive composite layer is arranged in the inside of polishing grinding wheel, and the bottom of abrasive composite layer is provided with base layer;The utility model is by stress dissipation layer using alternate layer design of bottom layer, transition layer and working layer, different fiber direction or material lamination, impact load and centrifugal stress in the process of polishing and grinding can be effectively dispersed, reduce structural cracking risk;By abrasive composite layer using bottom layer, transition layer, working layer, three layers of wear-resistant structure design, by material performance complement, bottom layer high cohesive strength, transition layer stress buffer, make the wear life of polishing and grinding wheel than traditional single-layer structure has somewhat improved;By the plant fiber matrix of working layer endows abrasive composite layer with "flexible grinding" characteristics, can be attached to stainless steel pipe material, sheet complex curved surface, improve processing precision stability.

This invention provides an anti-lifting and anti-counterfeiting tape and its manufacturing method. From top to bottom, it comprises a substrate layer, an anti-counterfeiting pattern layer, and a pressure-sensitive adhesive layer with a functional gradient structure. The pressure-sensitive adhesive layer is an integrally molded single-layer structure, and in the thickness direction perpendicular to the plane of the substrate layer, the cohesive strength of the pressure-sensitive adhesive layer exhibits an asymmetric gradient distribution. The pressure-sensitive adhesive layer includes a high-cohesion region: near the anti-counterfeiting pattern layer, the chemical cross-linking density of which keeps the elastic modulus of this region within a preset range, thereby suppressing elastic stringing deformation of the adhesive under peeling force. This invention achieves effective interception and dissipation of the substrate's rebound stress by setting a low-modulus "high-wetting region" on the adhesive side and introducing an "internal stress self-adaptive layer" under the substrate. While ensuring long-lasting adhesion without lifting on curved surfaces, it avoids damage to the cardboard fibers caused by strong peeling, achieving a balance of "strong adhesion without fiber breakage."

The invention discloses a heat insulation aluminum profile and a preparation method thereof, and belongs to the technical field of heat insulation materials. The bisphenol A type epoxy resin is chemically modified through the ultraviolet absorbent and the cross-linking agent, the ultraviolet absorption and conversion capacity of the resin is improved, the cohesive strength and the cross-linking density of the coating are enhanced, the modified composite filler A and the modified composite filler B are added, the dispersity and the interface bonding force of the coating in a resin system are effectively improved, and the service life of the coating is prolonged. A chemical bonding effect is formed, the adhesive force is better, the weather resistance and the anti-aging performance are remarkably improved, and the service life of the heat insulation aluminum profile is prolonged; besides, the modified epoxy resin and the polyester resin are compounded to serve as a film forming substance, and a composite filler A (titanium dioxide, lanthanum oxide and mica) and a composite filler B (crushed crude pearlite and hollow glass beads) which are modified by specific silane are introduced, so that the heat insulation performance of the coating can be remarkably improved, and the heat insulation aluminum profile with an excellent heat insulation effect can be obtained on the whole.

The invention discloses a low-temperature quick-acting adhesive and a preparation method thereof. The low-temperature quick-acting adhesive comprises a first component and a second component, the first component comprises polyether polyol, vegetable oil modified polyol, polyether amine, a coupling agent, an anti-freezing agent, a catalyst, a viscosity reducer, a wetting dispersant, a defoaming agent, a filler and an anti-settling agent; and the second component comprises an isocyanate-terminated modifier, an activator, an anti-settling agent, a wetting dispersant and an active diluent. According to the low-temperature quick-acting adhesive and the preparation method thereof, through the comprehensive action of low-temperature-resistant adaptive adjustment of a formula, activation catalysis of component reaction activity and adhesion promotion, good adhesion performance under the low-temperature condition can be met, and the requirement of a stripping test within 24 h can be met in the aspect of adhesion onset time; the peel strength is greater than the cohesion strength of the foam; therefore, the low-temperature adaptability of an adhesive product and the timeliness of a curing process are effectively improved, and the production efficiency is further effectively improved.

The invention discloses a UV pressure-sensitive adhesive for a protective film and a preparation method of the UV pressure-sensitive adhesive. The UV pressure-sensitive adhesive for the protective film comprises polyether polyol, aliphatic diisocyanate, dibutyltin dilaurate, hydroxyl acrylate, methylhydroquinone, an acrylate reactive diluent, a bifunctional crosslinking monomer and a photoinitiator. The pressure-sensitive adhesive is prepared by three steps of synthesizing urethane acrylate, preparing glue and preparing a protective film, the viscosity of the pressure-sensitive adhesive at 25 DEG C is 500-2000 mPas, and the pressure-sensitive adhesive is good in flowability, suitable for a high-linear-speed coating process, free of organic solvent, environmentally friendly, low in carbon, capable of being prepared by mixing at room temperature and short in process. The pressure-sensitive adhesive provided by the invention has the advantages of no residual adhesive, no fog shadow, excellent cohesive strength, high temperature resistance and weather resistance, solves the problems of high VOC emission, difficulty in balancing low viscosity and high performance and the like of the traditional pressure-sensitive adhesive, and is suitable for the limit protection requirement of a super-sensitive surface.

The present application belongs to the technical field of polymer materials, and particularly relates to a fireproof and antiskid composite multi-layer coiled material, which comprises SBC hot melt adhesive layer, fireproof fiber cloth layer, fireproof butyl rubber layer and non-woven fabric layer which are sequentially attached together. The thickness of the SBC hot melt adhesive layer is 0.1mm-0.3mm, the thickness of the fireproof fiber cloth layer is 0.2mm-1.0mm, the thickness of the fireproof butyl rubber layer is 0.4mm-1.5mm, and the thickness of the non-woven fabric layer is 0.1mm-0.3mm. The fireproof and antiskid composite multi-layer coiled material provided by the present application has the advantages that the SBC hot melt adhesive layer can be partially moisture-cured, so that the cohesive strength is increased and the holding adhesion is substantially improved. When the coiled material is applied, compared with the existing butyl rubber, the slippage caused by the frequent treading of workers during the installation of the roof with large slope can be completely avoided. Meanwhile, the fireproof butyl rubber layer with the thickness of 0.4mm-1.5mm is applied, the non-woven fabric is used to replace the commonly used fireproof fiber in the fifth layer, the overall fireproof performance still meets the requirements, but the cost of the final product can be significantly reduced.

The following is provided as a plate-like composite material which enables continuous extrusion and rolling, and has excellent appearance and excellent yield despite its long size.　A plate-like composite material containing fibrils comprising a fluorine-based resin and a filler, wherein the ratio (Ct / Cm) of the cohesive force (Cm) in an MD direction to the cohesive force (Ct) in a TD direction orthogonal to the MD direction is 0.7-1.5.

A device for evaluating the adhesive strength of recycled asphalt mixture adhesive cement comprises a base, the base is provided with a heating clamping module located on the lower portion and a linear driving module located on the upper portion in the same vertical axis direction, the heating clamping module is detachably connected with a test piece base, and the linear driving module is detachably connected with the test piece base. The linear driving module is provided with a driving main shaft capable of vertically reciprocating, the driving main shaft is provided with a displacement sensor and a tension sensor, the driving main shaft is detachably connected with a test piece upper cover, and the heating clamping module is provided with a hot water inlet and a cold water outlet. The equipment for evaluating the adhesive strength of the recycled asphalt mixture provided by the utility model can conveniently adapt to tests of test pieces with different structures by replacing accessories, can flexibly adjust the temperature of the test pieces according to the evaluation test requirements, simultaneously obtains continuous real-time data of tensile force and displacement borne by the test pieces in the whole process, and improves the test efficiency. Therefore, evaluation data of the bonding strength of the recycled asphalt mixture adhesive cement can be well completed.

The application relates to the field of high polymer materials, and discloses a double-sided protective adhesive tape applied to a loudspeaker diaphragm and capable of resisting cold and hot cycle impact. The double-sided protective adhesive tape is prepared by selecting specific types of acrylate hard monomers and acrylate soft monomers, fully utilizing the fact that the hard monomers with higher Tg have better tensile resistance and heat resistance, the soft monomers with lower Tg have better stretchability and low-temperature resistance, and cooperating with three functional monomers of acetyl ethyl acrylate methacrylate, dimethylaminoethyl methacrylate and maleic anhydride, so as to improve the cohesive strength of the polyacrylate parent adhesive through copolymerization and crosslinking of hydroxyl, amino, anhydride and carbon-carbon double bond, and through the selection of the amount of the curing agent in the pressure-sensitive adhesive and the design of the structure of the double-sided protective adhesive tape, the double-sided protective adhesive tape with good peeling strength, creep resistance and cold and hot cycle impact resistance in a wide temperature range is prepared.

The invention discloses a low-temperature low-polarity adherend hot-melt pressure-sensitive label adhesive as well as a preparation method and application thereof. The hot-melt pressure-sensitive adhesive is prepared from the following components in parts by weight: 20-30 parts of SIS, 5-10 parts of SSBR, 5-10 parts of EVA, 35-50 parts of tackifying resin, 2-5 parts of a silane coupling agent, 15-20 parts of a softening agent and 1-2 parts of an antioxidant. The preparation method comprises the following steps: firstly, mixing and heating part of the tackifying resin, the softening agent and the antioxidant, then adding the SSBR and the SIS, then adding the EVA, and finally adding the rest of the tackifying resin and the silane coupling agent and uniformly mixing. Through the synergistic effect of all the components, the hot-melt pressure-sensitive adhesive has excellent low-temperature toughness, high adhesion to the surface of low-grade polyolefin and high cohesion strength at the same time, is particularly suitable for labels attached to PE / PP packages in cold-chain logistics, and effectively solves the problems of low-temperature label warping and falling.

The invention relates to the technical field of building aggregate processing, and discloses a water-force coupling weakening and directional collision crushing aggregate processing device and method.The water-force coupling weakening and directional collision crushing aggregate processing device comprises a soaking module and a collision module, and a soaking conveying device is used for soaking and wetting aggregate; the collision module comprises a first-stage drying and sorting device, a second-stage drying device, a collision device, an auxiliary pneumatic device and a third-stage sorting device; the collision device comprises an upper layer collision assembly and a lower layer collision assembly. The auxiliary pneumatic device is used for guiding aggregate in the two ends of the collision assembly to gather towards the middle till collision crushing occurs. According to the method, to-be-crushed aggregates are soaked in advance to be in a saturated state and regulated to be in a saturated surface dry state, the cohesion strength of aggregate particles is reduced through the wedging effect of water molecules, then two sets of aggregates with the same particle size group are accelerated to a set speed through synchronous acceleration, and accurate collision is conducted in a collision cavity, so that the crushing effect is optimized, and internal defect cracks are eliminated; and the energy efficiency of aggregate crushing and the quality of finished products are remarkably improved.

This invention provides a composite coating based on FPEEK, its preparation method, and its application, relating to the field of polymer composite materials technology. The preparation method involves adding polyaspartic acid ester (a polyurea precursor) to an FPEEK solution and dispersing it uniformly, then introducing h-BN and TiO2 inorganic fillers, and finally adding isocyanate to initiate curing. During this process, the in-situ generated polyaspartic acid ester molecular chains interpenetrate and entangle with FPEEK, forming a strong interfacial bond "dual-resin" continuous phase matrix, which greatly enhances the coating's cohesive strength and substrate adhesion. Simultaneously, this composite matrix effectively stabilizes and disperses h-BN and TiO2 nanofillers, preventing their aggregation and ensuring uniform distribution within the coating, synergistically imparting high solar reflectivity and high-to-medium infrared radiation characteristics to the coating.

This invention discloses a catalyst for refractory mica tape, an organosilicon adhesive, and their preparation method. The adhesive is prepared from a specific ratio of organic solvent, hydroxyl-terminated silicone rubber, organosilicon resin, the refractory mica tape catalyst, and a stabilizer. The catalyst for refractory mica tape of this invention exhibits high catalytic activity and automatically decomposes without residue at around 130°C. Therefore, the production process of the organosilicon adhesive does not introduce organic amines that corrode the copper core or metal salts that affect electrical properties, thus maintaining the insulation of the mica tape and resulting in refractory mica tape with excellent insulation. The organosilicon adhesive of this invention, due to the use of a special catalyst, possesses excellent properties including high-temperature resistance, no corrosion to the copper core, absence of metal ions, and superior cohesive strength and peel strength.

The present invention includes hot melt adhesive compositions based on polyolefin polymers that can be used for applications in disposable absorbent articles, such as construction applications. The olefin-based hot melt adhesive composition has an unexpectedly good cohesive strength.

The application belongs to the field of high polymer materials, and particularly relates to a degradable polyurethane adhesive as well as a preparation method and application thereof. The adhesive comprises the following components in parts by weight: PBAT 20-40 parts; polyester diol 20-40 parts; isocyanate 7-11 parts; tackifying resin 20-40 parts; catalyst 0.5-3 parts; and the number average molecular weight of the PBAT is 4000-10000 Mn. The preparation method comprises the following steps: dissolving the PBAT by heating, mixing the polyester diol; adding the isocyanate, adding the catalyst and the terminating agent after cooling; and finally adding the tackifying resin to prepare a glue solution. The adhesive is used for preparing adhesive tapes. The molecular weight of the PBAT is regulated to a specific range, so that the problems of high viscosity, coating difficulty and poor initial adhesion caused by the excessively high molecular weight of the PBAT, and the problems of insufficient cohesive strength, poor holding adhesion and easy residual glue caused by the excessively low molecular weight of the PBAT are solved, the final adhesive can be effectively degraded under the composting condition, and the environmental pollution problem caused by the waste adhesive tapes is solved from the source of the material.

The invention discloses an ultrahigh-stripping-force acrylate pressure-sensitive adhesive for a TPU (Thermoplastic Polyurethane) car cover film and a preparation method of the ultrahigh-stripping-force acrylate pressure-sensitive adhesive, and relates to an ultrahigh-stripping-force acrylate pressure-sensitive adhesive and a preparation method thereof. The invention aims to solve the problem that the traditional automobile cover film pressure-sensitive adhesive is difficult to balance between ultrahigh stripping force and high cohesive strength. The adhesive is formed by copolymerizing a (methyl) acrylate soft monomer, a hard monomer and a bifunctional monomer containing hydroxyl and carboxyl. According to the preparation method, a solution free radical polymerization process is adopted, and the size of polymerization molecular weight is controlled by controlling the monomer feeding sequence and proportion. The obtained pressure-sensitive adhesive has extremely high stripping force on a paint surface, and also has excellent cohesive strength, weather resistance and residual adhesive resistance, so that the TPU vehicle cover film can be permanently and firmly adhered, is free of residues during removal, and has excellent comprehensive performance. The invention belongs to the technical field of pressure-sensitive adhesives.

The invention provides a gold stamping fabric based on PUR glue and a production process of the gold stamping fabric. The production process comprises the following steps: S1, in a nitrogen atmosphere, melting solid PUR colloidal particles to obtain a PUR colloidal solution; s2, coating a base material with the PUR glue solution, and pre-curing, so that the surface of a coated PUR glue layer is crystallized to form a layer of leather film; s3, the base material and a gold stamping transfer film are compounded through a heating and pressurizing roller, gradient activation, aftertreatment and rolling are conducted, and the gold stamping fabric is obtained. According to the invention, polycarbonate diol and a dynamic covalent cross-linking chain extender are added into the PUR film for synergistic effect, an adhesive layer with high cohesive strength and microscopic elasticity can be formed after moisture curing, gradient activation is combined, the skin film is mildly reactivated in a first area, and sufficient flowing and bonding are realized in a second area, so that sufficient combination can be ensured, and meanwhile, the mechanical property of the PUR film is improved. The problems of glue permeation, glue layer transfer or fabric crushing can be completely eradicated, and the production yield and the pattern definition are remarkably improved.

The invention discloses a resin composition and application thereof. The resin composition comprises 50-180 parts of thermosetting resin, 10-50 parts of core-shell rubber or dispersion liquid thereof, 5-40 parts of polyolefin and 5-20 parts of thermoplastic polyimide resin. Wherein the thermoplastic polyimide resin has an average particle size of 1 to 10 [mu] m; the core-shell rubber has an average particle size of 0.1 to 10 [mu] m. The composition is endowed with the characteristics of low dielectric, high heat resistance and insulation through the thermosetting resin, the thermoplastic polyimide is introduced to improve the cohesive strength and modulus among the components and enhance the chemical compatibility and bonding strength with a CVL film, and the polyolefin and the core-shell rubber are matched to adjust the adhesive resistance and greatly improve the dielectric property and the bonding property, so that the adhesive property of the CVL film is greatly improved, and the service life of the CVL film is prolonged. The resin composition with excellent low dielectric, high heat resistance, low flowability and high cohesiveness is obtained, a prepreg with low dielectric, low gummosis and high cohesiveness is prepared, and the requirement for the field of rigid-flex printed circuit boards for high-speed signal transmission is met.

The application relates to a preparation method of a high-toughness and strong-wear-resistant WC-Co coating and belongs to the technical field of thermal spraying cermet coating. Firstly, slurry mixed with WC powder, Co powder and an organic binder solution is sprayed and granulated to prepare spherical powder, then low-temperature heat treatment is carried out to obtain spherical WC-Co powder with certain cohesive strength, the spherical WC-Co powder is mechanically mixed with fine-particle boron nitride powder, high-temperature heat treatment is carried out above the eutectic point of WC-Co, WC-Co powder is separated through airflow classification, the powder after high-temperature heat treatment is deposited on the surface of a metal base through supersonic flame spraying, and a strong-wear-resistant WC-Co coating with nanocrystalline Co can be obtained. The application technology converts amorphous Co in a traditional coating into nanocrystals, improves the toughness of the coating and does not reduce the hardness of the coating.

The invention provides a high-hardness super-wear-resistant paint, a coating and application thereof, and belongs to the technical field of paints. According to the invention, an unsaturated resin curing system is introduced on the basis of a rigid aromatic epoxy resin system, and free radical-initiated polymerization at room temperature is realized through an organic peroxide-amine modified compound curing agent, so that a molecular-level dual-system interpenetrating network structure is formed, and the crosslinking density and cohesion strength of the coating are greatly enhanced; the ceramic powder, the silicon nitride powder and the polytetrafluoroethylene modified wax powder are used for assisting, so that the hardness and the wear resistance can be further improved. Results of the embodiment show that after the coating provided by the invention is cured for 7 days at room temperature, the pencil hardness of a coating reaches 7H, and the Talbot abrasion index reaches 4.6 mg / 1000r (H-10 grinding wheel, 1kg load).

The invention belongs to the technical field of ceramic composite material manufacturing, and particularly relates to a SiC composite material preparation method based on cold spraying and siliconizing, which comprises the following steps: preparing SiC powder into suspension liquid, and depositing the suspension liquid on a substrate by using a cold air power spraying system to form a porous SiC preform coating; performing post-curing treatment on the prefabricated body coating to improve the cohesive strength of the prefabricated body coating; and finally, through melt siliconizing treatment, silicon reacts with carbon in the prefabricated body to generate a new SiC phase, pores are filled with the new SiC phase, and the SiC composite material component with high density and excellent performance is obtained. The advantage of low-temperature forming of low cold spraying is combined with the siliconizing technology, the temperature of a matrix is low in the cold spraying process, the adverse effect of high temperature on the material structure is effectively avoided, and the stability of the original phase of SiC is kept. And by regulating and controlling spraying parameters to be matched with a siliconizing process, the content of free silicon in the composite material and the distribution state of a newly generated SiC phase can be accurately controlled, and the compactness and the mechanical property of the material are further improved.

The application discloses a pulling device for detecting the bonding strength of asphalt material, which comprises a base, a vertical column arranged on the base and a crossbeam horizontally arranged on the vertical column, wherein the free end of the crossbeam is provided with a tension sensor for detecting the tension signal generated in the pulling process of the bonding test piece, a pneumatic push rod is arranged below the tension sensor and can realize axial linear movement for providing controllable tension, a displacement sensor for testing the displacement of the pneumatic push rod is arranged on one side of the pneumatic push rod, a pulling head is connected to the end of the pneumatic push rod for connecting with the surface of the bonding test piece and realizing interface separation in the loading process of the pneumatic push rod. The application can realize stable and controllable loading process, accurate force value collection and efficient test process and is suitable for rapid evaluation of the bonding strength of asphalt material.