80 results about "Resin bonding" patented technology

The application relates to the technical field of integrally-formed inductors, in particular to a moisture-resistant soft magnetic composite material and a preparation method thereof and an integrally-formed inductor. The moisture-resistant soft magnetic composite material comprises the following components by mass: 100 parts of soft magnetic powder, 2-5 parts of a resin bonding agent and silicon resin, wherein the mass ratio of the silicon resin to the resin bonding agent is (0.3-2.0):100. The moisture-resistant soft magnetic composite material can avoid the phenomenon of explosion of the integrally-formed inductor during a reflow soldering process after moisture absorption.

The invention relates to a light-cured dental resin adhesive containing a silane coupling agent modified monomer as well as preparation and application of the light-cured dental resin adhesive. The dental resin adhesive comprises a resin matrix, an organic polymer and a photoinitiator, wherein the resin matrix consists of methacrylate resin grafted and modified by a silane coupling agent and unmodified methacrylate resin. According to the method, the isocyano group of the silane coupling agent is selected to react with the hydroxyl group on the resin monomer to generate the silane modified grafted resin monomer, and the method is simple, low in equipment requirement and suitable for large-scale production; the obtained dental resin adhesive can be internally covalently cross-linked to enhance the self mechanical property, can also be chemically bonded with a bonding substrate by utilizing a grafted silane coupling agent to improve the interface bonding strength, is especially suitable for being used as an enamel bonding material, and can remarkably improve the service life and the curative effect of a bonded restoration.

The invention provides a composite material oil tank and a manufacturing method thereof, relates to the technical field of composite material oil tanks, and greatly simplifies the mold manufacturing and assembling process through the integrated design of a modular numerical control mold and a three-dimensional digital model. The die purchasing and processing cost is greatly reduced through partition die assembly and reuse of the supporting prosthesis, repeated investment of a special core die is avoided through accurate matching of the silicone rubber soft die and the air bag, and the laying quality of corners and narrow parts is improved. Through cooperation of two times of curing and a stepped lap joint structure, defects of fiber wrinkles, cavities, bridging and the like are effectively eliminated, and fiber continuity and resin bonding strength of a complex curved surface area are ensured. The finally formed composite material oil tank shell not only has excellent mechanical properties of high strength, high rigidity and light weight, but also has excellent sealing performance and durability, and an efficient and reliable solution is provided for large-scale application of a composite material oil tank with a complex structure.

The invention belongs to the technical field of electronic cloth, and particularly relates to slurry for low-dielectric fiber cloth as well as a preparation method and application of the slurry. The slurry for the low-dielectric fiber cloth is prepared from the following components in percentage by mass: 3.0 to 4.0 percent of vinyl alcohol polymer, 1.0 to 2.0 percent of ethylene oxide polymer, 0.1 to 0.3 percent of lubricating agent, 0.1 to 0.3 percent of dispersing agent, 0.1 to 0.3 percent of antistatic agent, 0.1 to 0.2 percent of coupling agent and the balance of pure water. According to the sizing agent for the low-dielectric fiber cloth, a low-polarity auxiliary agent system is adopted, the abrasion resistance of a sizing agent film and the stability of a sizing agent system are improved, fiber hairiness is reduced, the prepared electronic cloth is good in fiber dispersity and high in resin binding force after being subjected to high-temperature desizing, the use requirement of a high-speed PCB is met, and the reliability and CAF resistance of the electronic cloth in a severe environment can be improved; the invention also provides a preparation method thereof.

The invention discloses sub-nanowire modified resin as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The resin comprises sub-nanowires and a resin matrix, and solves the problem of poor adhesion caused by excessive hydration of an adhesion interface in clinical operation. Meanwhile, through the multi-stage interaction between the resin matrix and the sub-nanowires, the cohesive stability of the resin and the adhesive property of the resin can be improved at the same time. The resin disclosed by the invention can be applied to the fields of tooth restoration and the like, in particular to the aspects of tooth bonding, filling and the like.

The application is suitable for the technical field of power distribution equipment, and particularly provides a transformer, which comprises a magnetic ring, a wire and a framework; the surface of the magnetic ring is coated with an insulating material; the wire is wound on the magnetic ring, and the wire is wrapped with three insulating layers; the framework comprises a stand for bearing the magnetic ring, the stand is provided with a groove for accommodating the magnetic ring, the magnetic ring and the groove are fixed by epoxy resin bonding, the framework further comprises a terminal block arranged at the end of the stand, the terminal block comprises a metal pin for connecting with the wire, and the stand is further provided with an accommodating groove for accommodating the wire when the wire is connected with the metal pin. The technical problems of poor anti-vibration and anti-impact performance, unfirm structure, low working temperature, easy thermal expansion of the wire and poor environmental adaptability of the existing transformer are solved.

According to the high-heat-conductivity aluminum-based copper-clad plate and the preparation method thereof, the heat conductivity coefficient reaches 5.9 W / (mK), and the peel strength is larger than or equal to 1.2 N / mm. A high-heat-conductivity aluminum-based copper-clad plate comprises an aluminum substrate, a copper foil and a heat-conducting glue layer located between the aluminum substrate and the copper foil, a first resin bonding layer is arranged between the aluminum substrate and the heat-conducting glue layer, and a second resin bonding layer is arranged between the copper foil and the heat-conducting glue layer; the thickness of the first resin bonding layer and the thickness of the second resin bonding layer are respectively 5-10 microns; the filling amount of the heat-conducting filler in the heat-conducting glue layer is about 70-85% of the volume of resin in the heat-conducting glue layer, the resin of the heat-conducting glue layer is epoxy resin and phenolic resin, and the resin of the first resin bonding layer and the second resin bonding layer is at least one of epoxy resin and phenolic resin.

The invention relates to the cross technical field of layered products, grinding tools and polymer compositions, in particular to plant fiber reinforced environment-friendly degradable abrasive cloth which comprises a plant fiber reinforced substrate layer, a primer bonding layer, an abrasive particle layer and a composite adhesive protective layer. According to the abrasive cloth, natural plant fibers serve as a framework, a bio-based resin bonding system is compounded with an inorganic abrasive material, the biodegradation rate of 90% or above can be achieved within 90 days under the composting condition, and meanwhile the tensile strength and the grinding performance are not lower than those of traditional petroleum-based abrasive cloth.

The present application can obtain a metal-resin bonded body having a high bonding strength while maintaining the shape of a synthetic resin member that is pre-formed into a prescribed shape. In a method of manufacturing a metal-resin bonded body 30 obtained by bonding a metal member 20 and a synthetic resin member 10, the following processes are performed: a first process of bringing a metal bonding surface 22 heated to a first temperature T1 and a resin bonding surface 12 into contact and pressing the metal member 20 and the synthetic resin member 10 with a first pressure P1; and a second process of pressing the metal member 20 and the synthetic resin member 10 with a second pressure P2 higher than the first pressure P1 at a second temperature T2 lower than the first temperature T1.

This invention discloses a wet-process carbon fiber paper-based composite friction material and its preparation method, belonging to the field of friction material technology. The material, by mass percentage, comprises 30%-50% reinforcing fiber skeleton, 25%-40% resin bonding matrix, 5%-15% functional filler, and the remainder being process aids and pores. The reinforcing fiber skeleton is composed of surface-modified carbon fibers and at least one hybrid high-performance fiber. The key to its preparation method lies in employing a programmed hot-pressing curing process including a "pressure reduction-heating" stage. By precisely controlling the balance between resin viscosity, foaming gas pressure, and curing rate, a multi-level porous structure characterized by low-torsion through-holes is constructed in situ within the material. This invention effectively solves the problems of rapid thermal decay of the friction coefficient and high wear rate caused by weak interfacial bonding and uncontrollable pore structure in traditional paper-based friction materials, achieving a synergistic improvement in high and stable friction performance, excellent wear resistance, and heat resistance, making it suitable for high-end wet transmission systems.

The invention provides a novel kneading machine for fine chemical engineering resin adhesive production, and relates to the technical field of resin bonding, the novel kneading machine comprises a piston sleeve mounted on a synchronous frame, a piston rod is slidably connected in the piston sleeve in a sealed mode, an energy storage spring is mounted at the lower end of the piston rod, and a pressing block is connected to the lower end of the energy storage spring; the pressing block is slidably connected into the box body, the upper end of the piston sleeve is communicated with a pressure maintaining pipe, a one-way ring is installed in the pressure maintaining pipe, a one-way ball is installed at the lower end of the one-way ring in an attached mode, and a telescopic pipe coaxial with the pressure maintaining pipe is installed in the one-way ball. The most remarkable innovation of the kneading machine lies in that the pressure adjusting mechanism is introduced, the pressure can be automatically adjusted in different stages of the resin kneading process, in the initial stage of kneading, the system applies large pressure to raw materials through the energy storage spring and the piston assembly, sufficient contact and initial reaction among molecules are promoted, and the design conforms to the resin kneading rule.

The invention discloses a preparation method of an anti-cracking mould pressing inductor, which is characterized by comprising the following preparation steps: S1, mixing an organic resin adhesive, a nanoscale material, a solvent and a soft magnetic material to prepare a soft magnetic composite material; and S2, granulating the soft magnetic composite material, and drying to remove the solvent to obtain the required finished product soft magnetic composite powder. The method has the beneficial effects that the product performance can be considered, and the technical problem of appearance cracking of the cold pressing sample of the product can be effectively solved.

The invention discloses a vision-guided gradient functional resin gravel overlay structure and a construction method, and relates to the technical field of tunnel engineering construction.The vision-guided gradient functional resin gravel overlay structure sequentially comprises a tunnel pavement layer, a permeable resin bonding layer, a high-toughness resin colored ceramsite layer and a weather-proof resin sealing layer from bottom to top; the permeable resin bonding layer is composed of permeable epoxy resin and a curing agent and is used for infiltrating into the tunnel pavement surface to form layers with gap sealing and bonding effects, the high-toughness resin colored ceramsite layer is composed of high-toughness epoxy resin and colored ceramsite, and the colored ceramsite is spread before the high-toughness epoxy resin is cured. According to the vision-guided gradient functional resin gravel overlay structure and the construction method thereof, high-strength bonding is formed through the lower permeable resin bonding layer and the tunnel pavement layer, and gaps are sealed; and the middle high-toughness resin colored ceramsite layer provides wear resistance while ensuring bright color and a traffic induction function, so that the wear resistance, pollution resistance and aging resistance of the whole structure are improved.

The utility model discloses a building floor structure paved by stone, and belongs to the technical field of marble and granite paving treatment. The building floor structure paved by the stones sequentially comprises a composite stone layer, a cement mortar layer, a cement mortar leveling layer, a fine aggregate concrete leveling layer, a neat cement mortar layer and a floor base layer from top to bottom, wherein the composite stone layer comprises at least two composite stone blocks, and each composite stone block sequentially comprises stone, an epoxy resin bonding layer and an anti-skid floor tile from top to bottom. According to the paving method provided by the utility model, endogenous alkali can be prevented, long-term stable use of the stone after paving is realized, and the problem that alkali efflorescence is easy to occur when the existing stone is used is solved.

The invention describes an ultralight photovoltaic thermal energy (PVT) module. Cooling is achieved by a water tank (100) formed by a non-profiled surface (2) on the upper side and a plurality of semi-lens-shaped depressions (1) on the lower side. The narrow sections of the depressions form continuous enclosing surfaces (5) on the outer sides. The semi-lens-shaped depressions intersect to form longitudinal seams (8), which simultaneously create a pressure-resistant, stabilizing connection to the upper side. The cooling fluid flows through the water tank in a meandering pattern. The water tank is positively bonded to the photovoltaic module by resin bonding (3).

The invention discloses a micro magnetoelectric antenna based on MEMS resonance sound wave excitation and a driving circuit thereof. The micro magnetoelectric antenna comprises a PCB layer, an epoxy resin bonding layer, a bonding wire and a plurality of TPoS magnetoelectric antennas. The plurality of TPoS magnetoelectric antennas form a TPoS magnetoelectric antenna array; the TPoS magnetoelectric antenna comprises an SOI (Silicon On Insulator) wafer substrate and a magnetoelectric antenna structure arranged on the SOI wafer substrate; the SOI wafer substrate sequentially comprises a silicon substrate, a buried oxide layer and a device layer from bottom to top; the magnetoelectric antenna structure comprises a piezoelectric layer, an electrode layer and an Fe-Ga magnetostrictive material layer which are sequentially arranged above the device layer; the epoxy resin bonding layer is arranged on the PCB layer, and the TPoS magnetoelectric antenna array is bonded on the PCB layer through the epoxy resin bonding layer; and the bonding wire is used for establishing electrical connection between the electrode layer and the PCB layer. The miniature magnetoelectric antenna has the advantages of being small in size, adjustable in bandwidth, low in power consumption and easy to integrate, and can be effectively applied to the field of miniature wireless equipment.

This invention provides a method for preparing a mica insulating sheet for lithium-ion batteries without an aluminum metal layer, relating to the technical field of electrical insulation materials and insulating component molding / manufacturing processes. The method includes: S1. providing a sheet-like mica substrate and preparing an organosilicon resin bonding system for impregnation; simultaneously preparing a ceramic barrier slurry for surface layering, wherein the ceramic barrier slurry includes silica sol, zirconium oxide sol, and titanium dioxide. This method for preparing a mica insulating sheet for lithium-ion batteries without an aluminum metal layer utilizes a ceramic barrier system constructed from Si sol + Zr sol + titanium dioxide, avoiding the existing technology's reliance on an aluminum reflective layer in the process path. This allows the lithium-ion battery insulating material to meet heat resistance and insulation requirements while achieving aluminum-free insulation, improving its application compatibility between cells and between cells and the casing.

The invention relates to the technical field of laser material processing, in particular to a method for improving the bonding strength and corrosion resistance of a metal-CFRP connector, according to the method, a super-hydrophilic nano-micro structure is processed in an inner ring area of a metal bonding surface, and the wetting and permeating effects of a resin bonding film are remarkably improved; a capillary channel drainage structure is machined in the outer ring area and used for guiding corrosive media to be discharged, and interface durability is enhanced. Meanwhile, in combination with precise control of laser energy, the resin is selectively removed without damaging the carbon fibers according to the damage threshold difference between the carbon fibers and the resin in the CFRP, and the interface bonding performance is improved. The method is easy and convenient to operate, is suitable for connection scenes of various metals and composite materials, and has good engineering practical value and popularization prospects.

The invention discloses an epoxy resin adhesive as well as a preparation method and application thereof, and relates to the technical field of adhesives, the epoxy resin adhesive comprises the following components: epoxy resin, a modified flexibilizer, a curing agent, a filler and a coloring agent; wherein the modified toughening agent is prepared by the following steps: dissolving PEG in deionized water, and adding alpha-CD for reaction; then adding DIBM for reaction, precipitating, washing and drying to obtain an intermediate product; the intermediate product, bio-based polyester polyol and IPDI are subjected to a polymerization reaction, a modified toughening agent with a rotaxane structure and disulfide bonds is obtained, when the modified toughening agent is impacted by external force, an alpha-CD ring can slide along PEG, a pulley effect is generated, local stress is dispersed to a larger range, and the toughness of the adhesive is greatly improved; the rotaxane structure and the epoxy matrix are connected without chemical bonds, and the integrity of a cross-linked network is not damaged by the sliding motion of the rotaxane structure, so that the glass-transition temperature is not reduced while the toughening is realized.

A lamp includes: a housing in which an accommodating portion for accommodating a sealed member is arranged; a lens which covers the accommodating portion and is bonded to the housing; and a resin bonding material which is in contact with the housing and the lens and bonds the housing to the lens. Besides, the housing includes, as the accommodating portion, a first accommodating portion having an elongated shape, and a second accommodating portion having an accommodating part wider than that of the first accommodating portion, wherein a first abutting surface of the housing and a second abutting surface of the lens in the second accommodating portion are formed in a manner that the respective surfaces thereof have an uneven shape. The resin bonding material is in contact with a protruding surface of the housing and a wall portion of the lens.

Provided is a semiconductor device (1) that makes it possible to achieve high bonding strength at a low bonding temperature. In the semiconductor device (1), a metal material includes a copper layer and a solder layer sequentially formed in a hole of an organic insulating material, and includes a resin bonding part (22) formed from the organic insulating material, in contact with the metal material.

The invention discloses a polyetheretherketone and resin bonding strength enhancing method, and relates to the field of polyetheretherketone and resin bonding strength enhancement, and the method comprises the following steps: step 1, surface purification; step 2, sulfonation etching; 3, preparing a solution; step 4, carrying out ultraviolet grafting; step 5, deep cleaning; step 6, bonding a prime coat; and step 7, resin bonding. According to the technical scheme, breakthroughs are made in three aspects of bonding strength, process safety and durability, and a PEEK-resin interface which is high in strength, high in durability and free of mechanical damage is achieved on the premise of simplifying the process and guaranteeing safety through double-scale cooperation of sulfonated micropores and ultraviolet POSS grafting, so that the service life of the PEEK-resin interface is prolonged, and the service life of the PEEK-resin interface is prolonged. The defects that existing physical, chemical and coating technologies are short in aging, high in energy consumption or weak in binding force and the like are overcome.

The invention relates to the technical field of manufacturing of composite material structural parts, in particular to a telescopic device of a CFRP comb plate and a using method of the telescopic device. The CFRP comb plate assembly comprises a first CFRP comb plate and a second CFRP comb plate which are in butt joint through comb teeth, and the first CFRP comb plate and the second CFRP comb plate are provided with a plurality of bolt counterbores. The first CFRP bottom plate is provided with unthreaded holes corresponding to the bolt holes of the first CFRP comb plate and an anchoring shear nail connecting seat mounting square groove, and the second CFRP bottom plate is provided with unthreaded holes corresponding to the bolt holes of the second CFRP comb plate and an anchoring shear nail connecting seat mounting square groove. The anchoring shear nail connecting seats subjected to surface shot blasting treatment are embedded into the anchoring shear nail connecting seat mounting square grooves of the first CFRP bottom plate and the second CFRP bottom plate by coating resin in a bonding manner; when in use, the CFRP comb plate and the CFRP bottom plate assembly are fixed through bolt and nut connection. The device is small in electromagnetic interference, and layering and cracking of the composite panel are restrained.

The present application relates to an insulating boom and a preparation method therefor, and further relates to an aerial platform truck comprising the insulating boom. The insulating boom comprises an insulating boom body, the insulating boom body comprises fibers and resin, the fibers comprise basalt fibers and glass fibers, and filaments of the fibers are bonded by the resin. The insulating boom has high rigidity and high insulation properties and can maintain a high insulation effect after exposure to rain, thereby effectively improving the reliability of equipment in complex environments.

The utility model relates to the technical field of silicone resin adhesive production, especially a kind of automatic feeding equipment for silicone resin adhesive production, it include: fixed platform, the fixed platform upper end fixed mounting has material cylinder, the fixed platform is opened with notch, the notch is slidably connected with pouring box, the notch is opened with opening, the opening fixed mounting has pouring pipe, the fixed platform is fixedly installed with rotating electrical machine, the output shaft of rotating electrical machine is fixedly installed with threaded rod, the pouring box is screwed on threaded rod, the pouring box is rotatably installed with baffle, the baffle one end is fixedly installed with spur gear one on, the fixed platform is fixedly installed with rack, spur gear one is engaged with rack. The utility model can complete the automatic feeding of the production raw material of silicone resin adhesive, and can carry out ration feeding, so that the proportioning stability of production raw material can be guaranteed.

The invention discloses a method for producing hydrogen by electrolyzing methanol by using a Pd-Ru nanoparticle nitrogen-doped carbon catalyst with temperature dynamically controlled by a thermocouple in the technical field of electrochemical energy. The method comprises the following steps: constructing a reaction system by using a transparent polycarbonate electrolytic bath and an anion exchange membrane; a specific catalyst and a binder are rolled to prepare a microporous electrode, and the microporous electrode is compounded with a metal current collector to prepare a working electrode. The system integrates various thermocouples to monitor the temperature of a catalyst layer and the electrolyte in real time, and adopts a fuzzy logic algorithm to dynamically adjust a temperature control mechanism, so that the temperature of an electrode interface microcell is accurately and stably controlled. The catalyst is prepared by taking waste crab shells as raw materials, performing high-temperature carbonization and nitrogen doping treatment to obtain a carrier, performing microwave synthesis and laser processing to form a palladium ruthenium heterojunction nanocluster, and finally performing anion exchange resin bonding and electrochemical activation. The catalytic efficiency and the hydrogen production rate of methanol electrolysis hydrogen production can be effectively improved, and long-time continuous and stable operation of the system is ensured.

The invention relates to a stabilizer for odorless artificial leather, a preparation method of the stabilizer, a coating laminating material composition for PVC artificial leather, a corresponding coating laminating material for the PVC artificial leather and the PVC artificial leather. The preparation method comprises the following steps: selecting an alpha-olefin dimer from a polyolefin coordination polymerization light component byproduct, designing and synthesizing a polyol ester stabilizer with a branched long carbon chain on the basis of the alpha-olefin dimer, and reacting with zinc acetate to introduce Zn < 2 + > to form a coordinate bond with hydroxyl to prepare the alpha-olefin dimer-polyol ester-zinc composite stabilizer. Wherein the alpha olefin dimer has a branched non-polar carbon chain structure and is used for reducing the degree of crystallinity of PVC, the alpha olefin dimer is matched with the isophthalate plasticizer for use, so that the low-temperature flexibility of the PVC composite resin can be improved, the alpha olefin dimer is used as a resin bonding agent for PVC artificial leather, the polyhydric alcohol part is chelated with Zn < 2 + > and is used for absorbing HCl released by PVC, and the stability of a PVC product is improved. Meanwhile, the molecular weight and boiling point of the polyol ester stabilizer are higher, and the polyol ester stabilizer has lower odor.

[Object]To provide a surface-treated aluminum sheet having all of corrosion resistance, formability, and resin adhesion.[Solving Means]A surface-treated aluminum sheet includes an aluminum base material and an amorphous layer formed on at least one side of the aluminum base material. The aluminum base material is an aluminum sheet or an aluminum alloy sheet. The amorphous layer contains aluminum hydroxide, has an oxygen element to aluminum element (O / Al) ratio in a range of 1.7 to 3.0, and has a thickness of 1 nm or greater. As an alternative, a surface-treated aluminum sheet includes an aluminum base material and a surface treatment layer formed on at least one side of the aluminum base material. The aluminum base material is an aluminum sheet or an aluminum alloy sheet. The surface treatment layer contains aluminum hydroxide, and has a Pa / Pb value of 6.0 or smaller when, in an infrared absorption spectrum measured by FT-IR, the height of an absorbance peak at wavenumbers of 850 to 1000 cm−1 is defined as Pa and the height of an absorbance peak at wavenumbers of 1000 to 1200 cm−1 is defined as Pb.

The invention belongs to the technical field of floor materials, and particularly relates to a nano-porous crystal net heating material and a preparation method thereof. The composite material is composed of a base material, inorganic nano porous skeleton sol, a nano heating crystal-conductive phase, a bio-based resin binder phase, an interface coupling agent and a curing system. According to the invention, a wood-inorganic nano framework-organic resin interpenetrating and embedded three-dimensional nano porous crystal net is constructed through integrated component design and vacuum pressure impregnation and gradient curing processes; the Fe-Mn-Ti composite oxide and the nitrogen-doped porous carbon dots cooperate with each other, so that uniform surface heating is realized, and local hot spots are avoided; the bio-based binder phase and the coupling agent solve the problems of embrittlement and interface delamination of the inorganic phase, and the structural stability is improved; an anhydride curing system is environment-friendly and free of volatile matters, and has both safety and insulativity; the process ensures that the material is evenly distributed in the thickness direction, endogenous heating and heat preservation functions are achieved, temperature uniformity is remarkably improved, the service life is remarkably prolonged, and environmental adaptability is remarkably improved.

The application discloses an agglomerated diamond accumulation composite material, a diamond accumulation sand disc and a preparation method thereof, and relates to the technical field of precision grinding and surface treatment of superhard materials. The application performs surface modification on the diamond by using a silane coupling agent, and combines the diamond with a resin bonding agent, and adds inorganic oxides such as zirconium oxide, aluminum oxide and silicon carbide, so that a high-strength diamond composite material is prepared through high-temperature sintering, the compression strength of the composite particles and the interface bonding density are significantly improved, the composite particles are closely arranged and the structure is stable during dry grinding and wet grinding, the self-sharpening property is strong, the composite particles are resistant to high temperature and do not creep, the interface of the abrasive tool substrate is treated by using the silane coupling agent, the high-strength bonding force between the resin bonding agent, the composite particles and the substrate is effectively enhanced, the finished diamond coated abrasive tool is free of flying pieces, flying filaments, particle dropping, delamination under the condition of high-speed rotation, and the comprehensive performance of the product is significantly better than that of the products on the market.