85 results about "Cohesive strength" patented technology

The invention discloses a material fatigue crack propagation prediction method based on a cyclic cohesion model of a random vibration load. The method comprises the following steps: building a crack propagation analysis finite element model based on the cyclic cohesion model; based on the established crack propagation analysis finite element model, calculating the strain of the whole non-cohesion region unit and the separation displacement of the cohesion unit under the current time increment step; according to the separation displacement and the frequency and the amplitude of the current vibration load, the traction force increment in the current time increment step is calculated, and the cohesion strength, the critical separation displacement and the accumulated separation displacement in the traction separation criterion after the fatigue damage increment is loaded are updated; and unit failure judgment is carried out according to the fatigue damage, and if the fatigue damage is reduced to 0 and the cohesive unit rigidity value is reduced to 0, it is judged that macroscopic expansion of fatigue cracks occurs. According to the method, reasonable prediction of fatigue crack growth under the random vibration condition is realized, and the method has wide adaptability.

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 discloses an emulsion type release agent and a preparation method thereof. The release agent is prepared from the following raw materials in percentage by mass: 5 to 15 percent of linear vinyl silicone oil, 5 to 15 percent of Q type vinyl silicone oil, 15 to 20 percent of T type vinyl silicone oil, 1 to 3 percent of hydrogen-containing silicone oil, 0.2 to 1 percent of anchoring agent, 0.3 to 1 percent of polyether modified silicone oil, 10 to 50 ppm of platinum catalyst, 200 to 1000 ppm of inhibitor and the balance of deionized water. The release agent with the release force of 5-20.0 g / inch and relatively high interface bonding strength and cohesive strength in an adhesive force test is obtained through synergy of vinyl silicone oil with different molecular configurations, and the product performance requirements of high anchoring force and low release force can be met.

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.

The invention discloses a waterborne coating for corrosion prevention of neodymium-iron-boron magnets and a preparation method and application of the waterborne coating, and the waterborne coating comprises, by weight, 40-70 parts of waterborne dimer acid modified epoxy emulsion; 2-10 parts of a coalescing agent; 0.5-4 parts of a nonionic aqueous dispersant; 2-5 parts of a phenolic aldehyde amine curing agent; 10 to 20 parts of filler; 10-20 parts of a coloring agent and the balance of water. The water-based paint disclosed by the invention can resist high-pressure water vapor erosion and normal-temperature environmental corrosion, the corrosion resistance and adhesive force of the water-based paint are equivalent to those of the existing oil paint, and the water-based paint is free of rusting and bubbling after being tested for 120 hours by PCT. The water-based dimer acid modified epoxy emulsion is used as a main material, and water is used as a diluent in the use process, so that the emission of VOC (volatile organic compounds) in the production process is greatly reduced, the environment friendliness of the production is improved, and in addition, the production cost is relatively low. Meanwhile, by adjusting curing conditions, the hardness, SST, PCT and cohesive strength of the coating can be adjusted, and the requirements of different customers are met.

The invention discloses a high-strength waterproof polyurethane adhesive and a preparation method thereof, and relates to the technical field of polyurethane adhesives. The invention relates to a flame-retardant polyurethane elastomer, which is prepared from the following ingredients in parts by weight: 40 to 60 parts of polyether polyol, 20 to 30 parts of polyester polyol, 25 to 35 parts of modified diphenylmethane diisocyanate (MDI), 5 to 10 parts of nanometer silicon dioxide, 1 to 3 parts of silane coupling agents, 3 to 5 parts of 1, 4-butanediol (BDO), 0.1 to 0.3 part of dibutyltin dilaurate (catalysts), 0.5 to 1 part of antioxidants and 0.2 to 0.5 part of ultraviolet light absorbers. Through polyether / polyester polyol compounding and MDI reaction, a microphase separation structure is formed, cohesion strength is improved, nano-silica and KH-550 synergistically enhance interface bonding force and inhibit water molecule permeation, the strength retention rate after water resistance is larger than 90%, and the water-resistant polyurethane elastomer is suitable for long-term use in a high-humidity environment.

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.

The invention discloses gypsum plastering mortar with gradient aggregate enhanced cohesion strength and a preparation method thereof.The gypsum plastering mortar is prepared from anhydrite, modified glass beads, modified quartz sand, ash calcium, modified heavy calcium carbonate, cellulose, starch ether, an air entraining agent, a retarder and a thixotropic lubricant, and the preparation method comprises the steps of S1, preparing the modified glass beads, S2, preparing the modified heavy calcium carbonate, S3, preparing the modified quartz sand, S5, preparing the modified quartz sand, S6, preparing the modified quartz sand, and S6, preparing the gypsum plastering mortar. S4, all the components in the formula are mixed, through gradient particle size design of the modified glass beads, the modified quartz sand, the modified heavy calcium carbonate and the ash calcium, a close packing structure is formed, the compactness of the mortar is improved, and therefore the structural strength of the gypsum plastering mortar is effectively improved; and the interface bonding force with a gypsum matrix can be enhanced, a three-dimensional network is formed with cellulose and starch ether, and the cohesion strength of the gypsum plastering mortar is effectively improved, so that the structural strength of the gypsum plastering mortar is further improved.

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 invention discloses a surface treating agent for improving cohesion of a conversion film on a metal surface, and each liter of the surface treating agent comprises the following components by mass: 75-200mg of hexafluorozirconic acid or hexafluorotitanic acid, 10-100mg of nitrate, 10-50mg of an organic coupling agent, 20-50mg of a dispersing agent, 50-200mg of dopamine coated nano oxide particles and the balance of water. The obtained conversion film layer is high in cohesion strength, the compactness of the conversion film layer can be maintained under the high-temperature condition, stress release during dehydration is promoted, and therefore cracking and falling of the conversion film layer after high temperature are resisted; and after the conversion film and the organic coating are jointly heated and cured, the adhesive force of the organic coating is obviously improved, so that the long-term durability of the whole coating is ensured.

The invention discloses a maximum horizontal ground stress prediction method based on well wall caving geometry in any shape, and relates to the technical field of well drilling and completion, and the method comprises the steps: constructing a well wall caving geometric model based on well wall logging data; according to the well wall caving geometric model and the rock mechanics experiment data, a well wall strength mechanical model considering the scale effect is established, and the well wall caving rock cohesion strength is obtained; establishing a semi-analytical well periphery coupling temperature-seepage-stress calculation mechanical model by utilizing a well wall caving geometric model to obtain a total stress field; the total stress field comprises an elastic stress field, a pore elastic stress field and a thermal elastic stress field; establishing a well wall caving stable stress intensity criterion; according to the well wall caving geometric model, the well wall caving rock cohesion strength and the total stress field, the well wall caving stable stress strength criterion is used, an inversion model is established, the magnitude and direction of the maximum horizontal ground stress are predicted, and the maximum horizontal ground stress prediction efficiency and accuracy are remarkably improved.

The invention discloses a kind of fast cooling emulsion explosive packaging film heat-sealing adhesive and its application, the heat-sealing adhesive includes 40~45 parts of ethylene-octene elastomers, 15~20 parts of polyethylene wax, 25~30 parts of resins, 25~30 parts of hyperbranched polymers, and 1.0~1.5 parts of anti-oxidation according to parts by weight; the hyperbranched polymer improves cohesive strength by internal hydrogen bond, and external olefin and PO film have better bonding strength, and overall hyperbranched structure has lower melting point and viscosity and can better wet PO film surface. The heat-sealing adhesive of the present invention can both reach the bonding strength reached by high-temperature heat-sealing adhesive at a lower glue application temperature, so as to reach the purpose of fast cooling in the case of reducing glue application temperature and without reducing bonding strength.

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.