63results about How to "Avoid premature curing" patented technology

The invention is a radiation curable coating containing an antimicrobial agent, where upon irradiation with UV light, the radiation curable coating rapidly cures to a polymeric coating. The polymeric coating has durable antimicrobial properties, being especially effective at preventing the growth of Staphylococcus aureaus and Kleibsella pneunoniae on wood flooring and furniture. The major components in the radiation curable coating are a urethane acrylic oligomer, a radiation cure package, an antimicrobial agent, a cross-linking agent, and optionally, an additive package. The radiation curable urethane oligomer is a relatively short chain backbone urethane polymer that is end capped with a radiation curable moiety, where the moiety is an acrylic. The cross-linking agent is one or more monomers used to lower the viscosity and promote cross-linking, and include acrylate esters of mono-, di-, tri-, or tetrafunctional alcohols. The radiation cure package contains at least one photoinitiator.

An aqueous-based UV-curable fluid composition for use in a micro-fluid ejection device. The fluid composition includes a mixture of poly-functional compounds, a colorant compound, a photo-initiator and less than about 50 weight percent water based on a total weight of the fluid composition, wherein the fluid composition is substantially devoid of volatile organic carrier fluids.

An aqueous-based UV-curable fluid composition for use in a micro-fluid ejection device. The fluid composition includes a mixture of poly-functional compounds, a colorant compound, a photo-initiator and less than about 50 weight percent water based on a total weight of the fluid composition, wherein the fluid composition is substantially devoid of volatile organic carrier fluids.

The invention discloses a device for on-track 4D printing of thermosetting shape memory polymers, and relates to the technical field of printing. The problem that an existing 4D printing device cannotwork on track is solved. The device for on-track 4D printing of the thermosetting shape memory polymers comprises a printing platform, a printing spray-head, a driving device, a feeding device, a curing device and a three-axis motion device, wherein the printing spray-head is adapted to spray thermosetting materials; the driving device is connected with the printing spray-head and drives the printing spray-head to spray the thermosetting materials, and the driving device is a piezoelectric vibration device; the feeding device comprises an injection pump and is connected with the printing spray-head through a feeding pipe; the curing device is fixedly connected with the printing spray-head, and the curing device heats the thermosetting materials sprayed on the printing platform by the printing spray-head in real time; and the three-axis motion device drives the printing spray-head, the curing device and the printing platform to move in the three-dimensional direction. The device for on-track 4D printing of the thermosetting shape memory polymers solves the problem that printing cannot be performed in weightlessness environment, improves the flexibility of a space station, and effectively reduces the dependence of the space station on ground supply.

The invention discloses a curing agent sustained release capsule for gas injection channeling prevention, a channeling prevention agent and a preparation method of the curing agent sustained release capsule. The curing agent sustained release capsule is prepared from the following components in parts by weight, 20-40 parts of a resin curing agent, 5-35 parts of a density regulator and 45-75 partsof a coating agent, the resin curing agent is sealed in the coating agent, and the density of the curing agent sustained release capsule is 0.66-0.8 g/cm<3>. The preparation method of the curing agentsustained release capsule comprises the following steps that all the components are evenly mixed at the high temperature according to a certain proportion, cooling is conducted to the room temperature, crushing and granulation are conducted, and thus the curing agent sustained release capsule can be obtained. The density of the curing agent sustained release capsule prepared through the preparation method is between the density of water and the density of injected nitrogen, and is closer to the density of the nitrogen, thus the curing agent sustained release capsule can flow along with a gasinjection channel after being mixed with a resin material, the curing agent sustained release capsule has excellent wellbore injectivity and meanwhile has the sustained release action, a curing reaction is generated only when the curing agent sustained release capsule enters the deep part of an oil reservoir, and the excellent plugging property is achieved.

The invention provides a vacuum film pasting apparatus. The vacuum film pasting apparatus comprises a vacuum cavity module, a film pressing module, a bearing module and a heating platform, wherein thefilm pressing module comprises a film pressing plate; and the bearing module comprises a bearing plate and a spring device. When the vacuum film pasting apparatus acts, the film pressing plate presses a film downwards to drive the bearing plate to move to the heating platform so as to heat the film sheet to enable jointing adhesive to be cured and laminated; after heating is completed, the film pressing plate moves upwards, and the spring device can release the spring potential energy pre-stored in lamination, and drives the bearing plate to move upwards to recover to the initial position. The invention also provides a vacuum film pasting method; and by virtue of the vacuum film pasting apparatus and method, lamination shortcoming caused by air bubbles between the film sheet and the to-be-pasted film part can be reduced, and the combination force between the film sheet and the to-be-pasted film part can be improved.

The invention discloses unsaturated polyester resin used for a bulk molding compound and a preparation method thereof. The resin is mainly prepared from the following raw materials by weight: 2000 to 2500 parts of phthalic anhydride, 7500 to 8500 parts of maleic anhydride, 3500 to 4000 parts of diethylene glycol, 4500 to 5000 parts of 1,2-propylene glycol, 3 to 5 parts of an antioxidant, 8 to 12 parts of a polymerization inhibitor, 3 to 7 parts of methylhydroquinone, 8500 to 9000 parts of styrene and 1 to 2 parts of p-benzoquinone. Compared with the prior art, the unsaturated polyester resin for the bulk molding compound provided by the invention has the following advantages: cost is significantly reduced, and excellent mechanical property is maintained.

The invention discloses a production method for a capacitive touch screen. The method includes the following steps: step 100. preparing a transparent electric level layer, and etching a capacitive sensing circuit on a transparent circuit board by using an integrated circuit manufacturing process; step 200. installing the transparent electric level layer, and pressing the transparent electric levellayer and a glass substrate into one body; and step 300. producing a touch screen to form into a shape, and adhering protective glass to the transparent electric level layer after the transparent electric layer is integrated. Through adoption of the scheme, optical cement is prevented from prematurely curing by controlling the time of constant temperature and cooling, thereby improving the adhesion strength, and the curing efficiency can be improved, and the curing time is shortened through the combination of air cooling and ultraviolet light; and the flatness during adhesion can be improved,uneven thickness of the optical cement is prevented, thereby improving the production quality, and further the cooling efficiency is improved by employing a mode of cooling roller extrusion.

The invention discloses a PVDF composite graphene filter element membrane and a production process thereof. The objective of the invention is to overcome the problem that the porosity and permeabilityof conventional PVDF membranes are reduced to varying degrees since nanoparticles have poor dispersibility in polyvinylidene fluoride and are prone to agglomeration. According to a technical scheme in the invention, the PVDF composite graphene filter element membrane comprises, by mass, 30 to 45 parts of a PVDF homopolymer, 60 to 75 parts of DMAC, 1 to 2 parts of PVP and 0.5 to 2.5 parts of modified graphene. The above components are added into a reaction vessel for preparation of a spun membrane and spinning molding is carried out; so the dispersibility, hydrophilicity and mechanical strength of the raw materials of a filter element are improved, and the filter element is allowed to have stable filtration precision.

The invention relates to a liquid crystal display panel and a substrate attaching method. The liquid crystal display panel comprises a CF substrate and a TFT substrate. The CF substrate is provided with a first arranged plate face; the TFT substrate is provided with a second arranged plate face, and the second arranged plate face and the first arranged plate face are opposite; and one of the firstarranged plate face and the second arranged plate face is provided with one or more protruding blocks, the protruding blocks are provided with clamping grooves, the other one of the first arranged plate face and the second arranged plate face is provided with one or more clamping blocks, and each clamping block is inserted into the corresponding clamping groove in a matched mode. According to theliquid crystal display panel and the substrate attaching method, the attaching precision of the CF substrate and the TFT substrate in the carrying process from attaching equipment and UV curing equipment is ensured, a dot curing device is omitted, in addition, the procedure is saved, thus the manufacturing cost of the liquid crystal display panel is lowered, the production efficiency is improved,and the product yield is increased.

The invention discloses a polyurethane resin pouring structure of a wind turbine blade, and a forming method. The pouring structure comprises a bottom-layer diversion medium, a reinforcement material,an upper-surface diversion medium, a glue pouring pipeline, an Ohm pipe used for glue pouring and a spiral pipe, wherein the bottom-layer diversion medium is disposed on the bottommost layer of a die; the reinforcement material is paved on the bottom-layer diversion medium; the upper-surface diversion medium is disposed on the upper surface of the reinforcement material at a chordwise glue filling side and is in partial lap joint with the upper surface of the reinforcement material; the Ohm pipe is disposed on an edge of the upper-surface diversion medium along an extending direction; a sleeving tubular diameter of two ends of the Ohm pipe is smaller than the diameter of the spiral pipe of the Ohm pipe; and a glue pouring hole of the glue pouring pipeline is located at the middle of the extending direction of the die and is docked with the Ohm pipe. The pouring structure disclosed by the invention has the beneficial effects that an overall pouring speed is increased; prolonging of pouring time caused by irrational flow channel design at a few of positions is avoided, so production efficiency is increased; easy occurrence of pouring failure during manufacture of polyurethane composite material products can be improved; and risks in shaping are reduced.

An aqueous-based UV-curable fluid composition for use in a micro-fluid ejection device. The fluid composition includes a mixture of poly-functional compounds, a colorant compound, a photo-initiator and less than about 50 weight percent water based on a total weight of the fluid composition, wherein the fluid composition is substantially devoid of volatile organic carrier fluids.

The invention belongs to the technical field of building construction equipment, and provides an automatic homogenization equipment for building construction. The automatic homogenization equipment includes two left-right symmetrical fixing mechanisms, and mounting plates are movably installed in the two fixing mechanisms through slide-moving mechanisms. Each fixing mechanism includes a first fixing plate and a second fixing plate, the first fixing plates and the second fixing plates are connected by connecting assemblies and positioning assemblies, automatic mortar discharging mechanisms areinstalled on the lower surfaces of the mounting plates, stirring assemblies are installed on the upper surfaces of the mounting plates, the stirring assemblies are connected with the automatic mortardischarging mechanisms, and automatic leveling mechanisms are installed on the rear sides of the automatic mortar discharging mechanisms. The automatic homogenization equipment is high in degree of automation, the work burden of construction personnel can be reduced, mortar can be automatically spread on a concrete floor before ceramic tiles are laid, the construction efficiency is improved, cement mortar can be prepared while use, and the cement mortar is prevented from solidifying in advance.

The invention discloses gluing device. The gluing device comprises a conveying track and a glue application module, wherein the conveying track is used for conveying products, the glue application module is arranged above the conveying track and comprises a low-viscosity glue spray system and a high-viscosity glue spray system, the low-viscosity glue spray system comprises low-viscosity glue and afirst glue gun, and the high-viscosity glue spray system comprises high-viscosity glue and two second glue guns. According to the gluing device, the low-viscosity glue and the high-viscosity glue areadopted to replace traditional PUR hot melt glue, the low-viscosity glue has relatively low viscosity, is less affected by temperature and can be prevented from curing in advance under the conditionof relatively low temperature, and product bonding quality is ensured; and the second glue guns are arranged on two sides of the first glue gun and apply the high-viscosity glue to edge positions of two sides of the product, so that dislocation and offset of composite actions due to insufficient viscosity after application of the low-viscosity glue are avoided. The gluing device is used in the technical field of glue joint.

An aqueous-based UV-curable fluid composition for use in a micro-fluid ejection device. The fluid composition includes a mixture of poly-functional compounds, a colorant compound, a photo-initiator and less than about 50 weight percent water based on a total weight of the fluid composition, wherein the fluid composition is substantially devoid of volatile organic carrier fluids.

The invention relates to the technical field of copper-clad plate production for mobile communication circuit boards, in particular to copper-based resin prepreg production equipment for the mobile communication circuit boards. The equipment comprises a copper foil winding drum, a grinding device, a coating device and a cutting device, a drying device and a glue supply device, wherein the copper foil winding drum, the grinding device, the coating device and the cutting device are sequentially arranged from front to back, the drying device is installed below between the coating device and the cutting device, and the glue supply device is connected with the coating device through a conveying pipe. A copper-based resin prepreg produced by using the equipment and reinforcing materials are laminated at high temperature to manufacture a copper-clad plate, so that the problem that in the prior art, the yield of copper-clad plate production is reduced due to the fact that defects such as inclusion of bubbles, uneven composition of the prepreg are prone to occurring in the processes of gum dipping and curing of the reinforcing materials is solved.

The invention discloses a glass yarn glue-dipping method. The method comprises placing a roll of glass yarn in a vacuum box connected to a vacuum pump and a pressure relief valve, opening the vacuum pump to form a vacuum environment in the vacuum box, feeding a mixed liquid of an epoxy resin and a curing agent into a vacuum box until the level of the mixed liquid exceeds the highest level of the glass yarn by a certain distance, carrying out degassing on the mixed liquid in the vacuum box until the mixed liquid does not have a large amount of air bubbles, opening the pressure relief valve so that the external gas enters the vacuum box and penetrates into the glass yarn by the imbalance of the internal and external air pressure, and soaking the glass yarn in the mixed liquid for a period oftime to obtain finished glass yarn. The glass yarn is infiltrated in vacuum and the glass yarn roll maintains the state at the factory without re-winding and unwinding so that the yarn output is moresmooth, the preparation time is short, the mixed liquid curing in advance is prevented, the possibility of hydrolysis is reduced, the corresponding equipment is low in cost, the floor space is reduced and the energy consumption is reduced.

The invention discloses rigid polyurethane foam plastic with a constant temperature function. The rigid polyurethane foam plastic is prepared from the following components in parts by weight: 70-90 parts of polyisocyanate, 50-80 parts by weight of a polyol, 4-10 parts by weight of a foaming agent, 0.5-1 part by weight of a catalyst, 1-5 parts by weight of an opening agent, 1-2 parts by weight of afoam stabilizer, 1-2 parts by weight of a cross-linking agent, 1-3 parts by weight of an outer foaming agent, 5-10 parts by weight of a phase change heat storage material, and 3-7 parts by weight ofexpanded graphite. According to the rigid polyurethane foam plastic and the preparation method thereof, the flame retardant property of the rigid polyurethane foam plastic can be remarkably improved,the rigid polyurethane foam plastic still has good mechanical properties at low density, meanwhile, the rigid polyurethane foam plastic has heat preservation and temperature adjustment functions, andthe usability of the rigid polyurethane foam plastic in the field of building materials is greatly improved.

The invention discloses an injection mold with high forming quality. The injection mold comprises mold bases and a cavity, the cavity is in the mold base, a plurality of electric-heating rods and cooling pipes are arranged in the mold base, the electric-heating rods are uniformly arranged in a mode of surrounding the cavity, the cooling pipes surround the four corners of the cavity, the mold base is further provided with a sprue gate, the sprue gate is communicated with the cavity, the mold base around the sprue gate is further provided with the plurality of electric-heating rods. According to the above mode, the sudden temperature dropping of the molten material is prevented in the sprue process, thereby preventing the molten material from curing in advance to cause the blocking so as to improve the quality of the formed product.