61 results about "Dry transfer" patented technology

A graphene transfer method using water vapor-assisted determination of CVD-grown graphene film on the Cu foil. By using the polymer film as a supporting layer, we found that graphene can be directly detached from the Cu foil as a consequence of water intercalated at the graphene-Cu interface(s), by a ‘dry transfer’ method. The delaminated graphene films are continuous over large area. This nondestructive method also worked for the transfer of graphene grown on a Cu single crystal without sacrificing the expensive crystal, thus affording the possibility of producing high-quality graphene and reusing the substrate. The Cu foil and single crystal can both be repeatedly used for many times, which may reduce the cost of graphene synthesis and is environmentally more benign. Our method affords the advantages of high efficiency, likely industrial scalability, minimal use of chemicals, and the reusability of the Cu foil in multiple growth and delamination cycles.

The present invention is drawn to a method of making a sealing product, by a) selecting an a sealing material of an optimum film, mat or multi-well plate surface material for a specific sealing application; b) treating the sealing material; and c) directly coating the sealing material with an adhesive in a pattern format using Gravure, screen, rotary screen, flexographic, pad printing or dry transfer techniques. The present invention is further drawn to a sealing product made using the aforementioned method.

The invention discloses a wet method for preparing a waterborne polyurethane space leather. The method uses anionic waterborne polyurethane emulsion immersion liquid and a demulsification crosslinking agent solution to treat a base cloth; the base cloth is coated with a waterborne polyurethane foam slurry, and subjected to condensation, washing, drying and dry transfer veneer to obtain the waterborne polyurethane space leather. The wear additives, wax powder and breathable additives added in the waterborne topping slurry system improve the scratch abrasion resistance of space leather, and endow the space leather with smooth surface, good handle, and excellent air and moisture permeability. The waterborne polyurethane space leather obtained by the method has the advantages of safety, environmental protection, good cut, fine compact structure, no crack or wear, and flexible handle.

Single-walled carbon nanotubes (SWNTs) are decorated with metal nanoparticles to form high-performance flexible hydrogen sensors. The special process to form the high-performance flexible hydrogen sensors can combine a dry transfer printing technique and modification of SWNTs with palladium (Pd) nanoparticles to provide high-performance hydrogen sensors with excellent mechanical flexibility on plastic substrates. Two approaches can be used to decorate the SWNTs. One is physical deposition, such as electron beam evaporation (EBE) and the other is electrochemical deposition which can selectively grow palladium nanoparticles on the surface of the SWNTs, resulting in significantly decreasing the use of palladium. Preferably, the Pd nanoparticles are deposed on the SWNTs in a discontinuous arrangement so that the Pd nanoparticles are spaced away from each other to form individual discontinuous Pd nanoparticles rather a continuous Pd film. Advantageously, the SWNTs are arranged with substantial semiconducting pathways. Desirably, the high-performance flexible hydrogen sensors have an excellent response and recovery time, provide superior sensitivity for detecting hydrogen, and are bendable to conform to the contours of other structures.

Provided are an optimized tool apparatus and methods for dry transfer printing of semiconductor elements with high yield and good placement accuracy. The tool apparatus comprises a vacuum coupled fast peel apparatus that provides high pickup yield of the semiconductor elements. In an aspect, this vacuum coupled apparatus provides high pickup rates during pickup of the semiconductor elements from a donor/source wafer. Provided is a tool apparatus for dry transfer printing with a reinforced composite stamp having a thin glass-backing. The tool apparatus also comprises a pressure regulated micro-chamber which provides precise control of a composite stamp lamination and de-lamination. In an aspect, the micro-chamber has an internal cavity volume that is variably controlled, thereby providing precise control of the force on the stamp, and corresponding separation velocity, and improved semiconductor element pick-up and/or placement.

The invention discloses a formula for producing synthetic leather from graphene modified waterborne polyurethane. The formula comprises a coating solution. The coating solution comprises 51-88.999% of waterborne polyurethane emulsion, 5-15% of filler, 3-10% of stearic acid ammonium emulsion, 0.5-3% of foaming agent, 0.001-1% of graphene, 0.5-10% of water-based color paste, 0.5-2% of ammonium hydroxide, 0.5-5% of flatting agent and 1-3% of thickener. The technology comprises the steps of adding raw materials in the formula, and conducting stirring, filtration and viscosity regulation to obtain the coating solution; making the coating solution into coating foams, and applying the coating foams onto a leather base cloth; conducting drying to obtain a foam base; conducting aftertreatment to obtain the graphene modified waterborne polyurethane synthetic leather. By producing the foaming synthetic leather from graphene modified waterborne polyurethane, the wear resistance of a membrane is improved greatly, the dry transfer coating procedure is omitted, and antistatic, flame retardant and waterproof effects are realized.

The invention discloses a preparation method of a fuel cell membrane electrode, which comprises the following steps: first catalyst slurry is applied to a side A of a proton exchange membrane by spraying; a transfer medium is coated with second catalyst slurry and dried; the dried transfer medium is attached to the proton exchange membrane spray-coated with the first catalyst slurry, the side, spray-coated with the second catalyst slurry, of the transfer medium faces an uncoated side B of the proton exchange membrane, the side A, spray-coated with the first catalyst slurry, of the proton exchange membrane is covered with a protective film, a heat transfer printing process is adopted, and after hot pressing, the transfer medium is peeled off to obtain a fuel cell membrane electrode. Throughspray coating first and then transfer printing, the problem that it is not easy to turn over and lay a membrane and the proton exchange membrane is easy to roll up in a single ultrasonic spray coating method is avoided, the production efficiency is improved, the problem of high interface resistance between the catalytic layer and the proton exchange membrane in a single transfer printing method is avoided, and the ohmic impedance loss is reduced.

A multilayer composite for applying printed graphics to a receptive substrate, comprising: a carrier sheet; a transparent breakcoat having an upper surface releasably bonded to the carrier sheet, and a lower print receptive surface on which graphics are permanently printed; and a layer of pressure sensitive adhesive having an upper surface permanently adhered to the thus printed graphics, and a lower surface releasably adhered to a protective liner. The protective liner is separable from the adhesive without disrupting the bond between the carrier sheet and the breakcoat, and the adhesive, and the adhesive is removably bondable to the substrate during a wet out period, after which the carrier sheet is separable from the breakcoat, allowing the breakcoat/graphics/adhesive residue to remain firmly bonded to the substrate.

The invention discloses a method for manufacturing a nano-wire piezoelectric device, which comprises the following steps of: arranging prefabricated nano-wires on a polyimide film to form parallel nano-wire arrays by using direct dry transfer; preparing a source electrode and a drain electrode of the piezoelectric device on the nano-wire arrays by adopting a micro or nano photo-etching method; and finally, adding a connecting point and a lead for connection on one side of the source electrode and one side of the drain electrode, and packing the surface of the piezoelectric device by adopting polydimethylsiloxane. The manufacturing method has the advantages of simple manufacturing process, wide application range, cost saving and the like, and greatly improves the yield of the piezoelectric device; the nano-wire piezoelectric device manufactured by implementing the method can realize simultaneous work of a large amount of nano-wires to generate electrical energy; and the stability and the output power of the piezoelectric device are improved by combining a packing process.

An internal electrode paste comprises electrode material powder, a binder resin containing a polyvinyl butyral resin as the main component, and a solvent. The internal electrode paste furthermore comprises a plasticizer, and the plasticizer is contained by 25 parts by weight or more and 150 parts by weight or less with respect to 100 parts by weight of the binder resin. The binder resin is contained by 2.5 to 5.5 parts by weight with respect to 100 parts by weight of the electrode material powder. It is possible to provide an internal electrode paste having enough strength and an adhesive force for the dry transfer method, and a production method of an electronic device using the paste.

A transfer paper which comprises a transfer paper base and a disperse dye ink printed thereon or imparted thereto. The transfer paper is used in a dry transfer printing method in which the transfer paper is pressed against a synthetic fibrous material with heating to thereby transfer the dye (pattern) from the transfer paper to the fibrous material. The transfer paper is characterized in that the transfer paper base has a releasant layer comprising a synthetic resin soluble in organic solvents and an ink-receiving layer made from a mixture comprising a hydrophilic synthetic resin which softens or melts upon heating, a hydrophilic binder, and various aids, the ink-receiving layer being superposed on the releasant layer. With this transfer paper for dry transfer printing, a highly fine pattern can be printed with excellent reproducibility. Furthermore, the transfer paper enables quick delivery by so-called printing without platemaking. The method of dry transfer plating employs this transfer paper.

The invention provides a method for improving thermal conductivity of a gallium oxide material. The method comprises: an epitaxial monocrystalline gallium oxide film is grown on a gallium oxide substrate; the monocrystalline gallium oxide film is transferred to a substrate material which has a thermal conductivity of more than 200 W/m.K and is compatible with semiconductors by means of an etching process combined with two-dimensional material transfer, and a monocrystalline gallium oxide material formed on the substrate is obtained. By transferring the monocrystalline gallium oxide film to a substrate which has a thermal conductivity of more than 200 W/m.K and is compatible with semiconductors, including diamond, an AlN substrate, a GaN substrate, a SiC substrate or a composite substrate composed of a Si substrate and diamond deposited on the Si substrate, the thermal conductivity of the gallium oxide material is effectively improved; and the process of dry transfer technique is simple, more mature process can be formed easily, thus the method is easy to promote, facilitates improving the production quality, and has high value for practical use.

A temporary under-eye anti-glare sport tattoo comprised of a solid dermatological composition with anti-glare properties. The composition forms a film that is deposited on a person's skin underneath the eyes and over the cheekbones by a dry transfer method. The film thus applied reduces eye glare and increases contrast sensitivity. By incorporating team or business logos, trademarks or the like, into the film, the present invention also serves as either an advertising mechanism for businesses or a mechanism to promote team spirit. The film is able to sustain a predefined shape, has adhesive properties, is water resistant, color fast, and heat resistant. The composition comprises oil, a gelling compound, dyes and a mixture of wax and carbon.

The invention discloses a transfer printing technology, and especially relates to a laser-engraving transfer printing technology. The laser-engraving transfer printing technology is relatively stable in printing effect and relatively good in printing effect, and successively comprises the following six steps: pasting a photogelatin, specifically coating transfer printing paper with the photogelatin by employing rolls; drying the photogelatin, specifically placing the transfer printing paper coated with the photogelatin into a dryer for drying, and controlling the drying temperature to be 150-200 DEG C; performing laser irradiation, specifically placing the dried transfer printing paper into a paper printing machine, and irradiating under laser; pasting a color slurry, specifically pasting the color slurry on the transfer printing paper subjected to laser irradiation; drying the color slurry, specifically drying the transfer printing paper subjected to color-slurry pasting; and performing heat transfer printing by employing a printer, specifically placing the prepared transfer printing paper and raw-material cloth in a printing machine, so as to finish printing-machine heat transfer printing.

The invention belongs to the technical field of photoelectric memories, and particularly relates to a nonvolatile photoelectric memory based on two-dimensional heterojunction optical wavelength induction and a preparation method thereof. According to the invention, different optical responses are generated on light with different wavelengths by using defect energy levels in a two-dimensional material, different charge storage states are realized under the driving of an electric field, and nonvolatile multi-value storage of the device is realized through bipolar change of a channel two-dimensional material and stepped change of the number of charges in a light absorption layer. The preparation method comprises the following steps: obtaining a two-dimensional material serving as a light absorption layer on a substrate by utilizing mechanical stripping or chemical vapor deposition, and then stacking the two-dimensional material with double polarities on the light absorption layer by utilizing a dry transfer technology to serve as a channel of a device. The novel nonvolatile photoelectric memory with the multi-value storage capability prepared by the invention has a wide application prospect in the field of future data photoelectric storage.

The invention discloses a preparation method of a super-hydrophobic graphene-based wrinkled film capable of controlling the springback direction of water drops, belonging to the field of ice prevention. With the wrinkled film in the invention, the bouncing direction of cold water drops can deviate from a surface after the cold water drops are impacted, so anti-icing efficiency is greatly improved.According to the invention, a rGO film is transferred to a biaxially stretched substrate film through dry transfer, and forces in four directions of the substrate film are sequentially retracted to obtain an irregular wrinkled film; and in virtue of a Stober method, SiO2 nanoparticles grow on the surface of rGO, and the SiO2/rGO wrinkled film with a micro-nano hierarchical structure is obtained through FDTS modification. At -20 DEG C, the water contact angle of the film is still larger than 150 degrees, and the rolling angle of the film is smaller than 4 degrees, so the film shows excellent low-temperature super-hydrophobic characteristics. Meanwhile, at a temperature of -10 DEG C, the supercooled water drops impact the surface of the film, and due to the fact that the irregular microstructure of the supercooled water drops enables the viscous force between solid and liquid to be asymmetrically distributed, the water drops retract asymmetrically, so the springback direction deviates in the fixed direction.

A carrier sheet with completely or partially detachable perforated sheet units improves the transferability of dry transfer symbols. A carrier sheet of dry transfer symbols may be comprised of a plurality of dry transfer symbols removably affixed to a plurality of perforated sheet units. At least one dry transfer symbol may be removably affixed to at least one side of the plurality of perforated sheet units

The invention discloses a method for transferring a two-dimensional material to a hole substrate, and relates to two-dimensional material transfer. The method comprises: pasting a PDMS thin film on the glass slide; stripping a two-dimensional material block onto the PDMS film; shearing the redundant part of the PDMS film under a microscope; fixing the obtained glass slide with the material in a substrate clamping groove of a two-dimensional material transfer table; adsorbing the silicon substrate with the hole on a sample seat of a transfer table; aligning the material to the hole in the Si substrate, and heating to make the PDMS film partially contact with the Si substrate; continuously raising the temperature to enable the PDMS film to be spontaneously and tightly attached to the Si substrate; and carrying out cooling to separate the PDMS film from the Si substrate. The viscosity of the PDMS film is adjusted by changing the temperature, so that the two-dimensional material is transferred to the silicon substrate with the holes. The method is a pure dry transfer method, the surface of the transferred sample is clean, the operation is simple, and the method can be realized only by controlling the temperature of the PDMS film without the help of excessive experimental instruments except a transfer table.

The invention discloses a method for rapidly treating the surface of transfer printing concrete. The method solves the problem that the color difference is caused due to the fact that the surface of existing transfer printing concrete is prone to whiskering. According to the technical scheme, the method comprises the following steps: putting the just-scoured transfer printing concrete into a vacuum drying oven for vacuum drying; and then carrying out surface accelerated carbonation treatment on the dried transfer printing concrete. The method has a remarkable anti-whiskering effect, is stableand reliable, and is capable of effectively improving the yield and impression quality of the transfer printing concrete.