31results about How to "Avoid powder shedding" patented technology

The invention belongs to the field of heat insulation materials and discloses a preparation method of an aerogel felt heat insulation material. Orthosilicic acid ester, ethanol and water are uniformlymixed, NH4F solution and ammonia water are sequentially added and uniformly stirred to obtain silica sol A; a resin, an initiator, a coupling agent and hollow glass beads are uniformly stirred and mixed in a sealable container to obtain a slurry B; a fiber felt is first impregnated in the silica sol A, then impregnated in the freshly prepared slurry B after being taken out, and the operation is repeated for 3 to 4 times so that the silica sol A is always in a stirring state when the fiber felt is impregnated in the slurry B, and then the fiber felt is taken out and placed in a vacuum condition for sealing and standing; the obtained fiber felt is subjected to aging and modifying, solvent replacing is performed by absolute ethanol, drying and heat treatment are performed to obtain the aerogel felt heat insulation material. On the premise of not affecting the heat insulation effect of the felt body, the invention overcomes the situation that the powder of the traditional silica aerogel felt falls off.

The invention belongs to the field of thermal insulation materials, and discloses a preparation method of an anti-powder-falling composite silicon dioxide aerogel felt. The preparation method comprises the following steps: S1, preparing a silicon dioxide aerogel felt; S2, dispersing hot melt adhesive powder and short fibers into water, uniformly stirring and mixing to obtain a slurry, uniformly coating one surface of the silicon dioxide aerogel felt with the slurry, then superposing another silicon dioxide aerogel felt on the silicon dioxide aerogel felt, repeatedly superposing multiple timesaccording to a silicon dioxide aerogel felt-slurry-silicon dioxide aerogel felt mode, and carrying out hot press molding to obtain a composite silicon dioxide aerogel felt; and S3, uniformly mixing aphotocuring resin and a photoinitiator to obtain a photocuring agent, uniformly spraying the front surface and the back surface of the composite silicon dioxide aerogel felt with the photocuring agentby using a spraying method, and carrying out ultraviolet curing to obtain the composite anti-powder-falling silicon dioxide aerogel felt. According to the invention, under the premise of no influenceon the heat insulation effect of the aerogel felt, the mechanical property of the aerogel felt is enhanced, and the defect of powder falling of the traditional silicon dioxide aerogel felt is overcome.

A method for prepare a high-adhesiveness water-borne polymer coated membrane comprise uniformly mixing polymer powder, dispersant, adhesive, thickener, surfactant and deionize water to obtain polymercoated slurry, mixing that polymer powder, dispersant, adhesive, thickener, surfactant and deionized water to obtain polymer coated slurry, and mixing the polymer powder, dispersant, adhesive, thickener and deionized water. The obtained polymer coating slurry is coated on a polyolefin film and dried to obtain a coated diaphragm crude product; The obtained coated diaphragm crude product is immersedin a modified liquid, and the modified coated diaphragm is obtained by rolling the coated diaphragm in the modified liquid; The obtained modified coating diaphragm is dried to obtain a highly adhesive aqueous polymer coating diaphragm. The high-adhesion waterborne polymer coated diaphragm prepared by the invention remarkably improves the adhesion of the coated diaphragm, avoids the powder dropping phenomenon, is favorable for subsequent processes such as slitting and core winding, and simultaneously remarkably improves the comprehensive performance of the lithium ion battery diaphragm.

The invention discloses a preparation method of a lithium ion battery positive plate. The method comprises the following steps: 1, adding dry powder containing polyoxyethylene PEO into a solvent to prepare a glue solution; 2, adding the glue solution into a mixture of a positive active material and a conductive agent and stirring to prepare positive paste; and 3, coating the positive paste by means of silk-screen printing coating and drying. According to the preparation method of the lithium ion battery positive plate and the lithium ion battery positive plate manufactured by using the preparation method, PEO softening positive paste is added to prevent the crisping of the positive plate; by using a silk-screen printing coating way, the phenomenon that powder falls down during slicing is avoided, and the performance of the lithium ion battery is greatly improved.

The invention relates to an internally heated getter pump. The pump comprises a plurality of air suction elements 1, a supporting body, positioning plates 5 and a base 6. The supporting body comprisesa central supporting bar 2 and a cylindrical hollowed-out thin shell 4. The central supporting bar 2 is connected with the cylindrical hollowed-out thin shell 4 through one positioning plate 5. The positioning plates 5 and the cylindrical hollowed-out thin shell 4 are fixed to the base 6 through the central supporting bar 2. A pump body is provided with the multiple air suction elements 1 which are uniformly fixed to the positioning plates 5 through thin metal bars 11 correspondingly. The base 6 is a high vacuum CF flange and is connected with the pump body central supporting bar 2 in a threaded form and connected with heating systems and thermocouples in the pump body and an external power supply by embedding four vacuum electrodes 7 in the base through kovar alloy. The internally heatedgetter pump provided by the invention adopts the internal heating column shaped air suction elements and is high in heating efficiency, uniform in exciting and high in air suction speed.

The invention discloses a process for preventing a lithium ion battery pole piece from powder shedding during processing. The process is characterized in that a layer of glue or ceramic coating is applied on a surface of the lithium ion battery pole piece, the glue layer or the ceramic coating completely covers a coating area of the lithium ion battery pole piece, wherein the glue layer is formedby dissolving CMC in the deionized water or dissolving PVDF in NMP to prepare glue solution coated on the coating of the lithium ion battery pole piece and drying the coated lithium ion battery pole piece, and the ceramic coating is prepared by mixing and stirring the ceramic powder and the PVDF glue solution, coating the mixture on the coating of the lithium ion battery pole piece and drying thecoated lithium ion battery pole piece. The process is advantaged in that the powder material can be prevented from shedding from the pole piece, adhesion between the pole piece and a diaphragm is improved, hot pressing and shaping capability of the battery is further improved, moreover, the liquid absorption capability of the pole piece is improved, and thereby the wetting effect of the electrolyte for the pole piece is improved.

The invention discloses a renovated iron drum production process. Cleaning solvent adopted in high-pressure cleaning comprises 40-60 weight parts of propanediol butyl ether, 16-20 weight parts of xylene, 10-30 weight parts of surface active agent, 6-8 weight parts of polyethylene glycol, 0.5-3 weight parts of coconut oil fatty acid diethanolamide, 3-5 weight parts of corrosion inhibitor, 0.5-1 weight part of modified polyether defoaming agent and 2-4 weight parts of stabilizing agent; then, water is used for washing the internals and the externals of drums; during cleaning, the cleaning solvent is removed by adopting a pressure difference; the shot blasting treatment is performed on the internal and the externals of the iron drums; shots of a shot blasting machine are stainless steel shotsor iron shots with diameters of 1.5-3 mm; a dust removing system is arranged on the shot blasting machine; and the powder spraying, the paint spraying and the drying are performed at 170-180 DEG C. The renovated iron drum production process controls each process link in a refined mode, is not easy to generate leakage at the bottoms of the renovated drums and uniform and beautiful in powder spraying to the surfaces, and only reaches the defective rate of about 2%.

The invention belongs to the technical field of material new energy, and more specifically relates to a preparation method of solid state lithium ion batteries. The preparation method comprises following steps: a cathode active substance, a conductive agent, and a binder are added into a solvent so as to prepare a cathode slurry, screen printing technology is adopted to prepare a positive plate, and drying treatment is carried out; at a protective atmosphere, polyoxyethylene, a lithium salt, a nanometer inorganic oxide, and ethyl cellulose are added into a solvent so as to obtain a polymer slurry, screen printing technology is adopted to prepare a polymer electrolyte film on the positive plate, and drying treatment is carried out; the positive plate, the polymer electrolyte film, and a negative lithium plate are subjected to sealing assembling in a punching machine so as to obtain a button solid state lithium ion battery. The shape of the prepared solid state lithium ion battery is controllable; the polymer electrolyte film and the electrode materials are combined preferably; interface performance is ensured; battery performance is better; the preparation method is simple in operation; and cost is reduced.

The invention provides a formula and a production method of high-tensile-strength plastering gypsum, and relates to the technical field of building materials. The high-tensile-strength plastering gypsum is prepared from the following raw materials in parts by weight: 50 to 60 parts of gypsum powder, 30 to 35 parts of purified water, 2 to 3 parts of tackifier, 10 to 13 parts of coarse whiting, 10 to 13 parts of slurry asbestos wool, 3 to 6 parts of vitrified microbeads, 10 to 20 parts of clay powder, 20 to 25 parts of lightweight aggregate, 30 to 35 parts of polypropionic acid resin, 5 to 15 parts of nano ceramic hollow microbeads and 2 to 6 parts of polyacrylamide. By adding the slurry forming asbestos wool and the vitrified micro bubbles into the plastering gypsum, the tensile strength and the heat insulation performance of the plastering gypsum can be improved, the flowability and the self-resistance strength of mortar are improved through the vitrified micro bubbles, the cohesiveness among all the materials is improved through the tackifier and the clay powder, and polyacrylamide is higher in cohesiveness and better in durability; therefore, the plastering gypsum is worthy of vigorous popularization.

The invention discloses a water swelling type water-blocking belt. The water-blocking belt includes a matrix layer, a water-absorbing layer and a protective layer; the inner wall of the matrix layer is in contact with the external of an optical cable or a cable; the bottom of the water-absorbing layer is connected to the outer wall of the matrix layer; the protective layer externally wraps the part, other than the junction part of the water-absorbing layer and the matrix layer, on the water-absorbing layer; the bottom of the protective layer covers the junction part of the water-absorbing layer and the matrix layer; the water-absorbing layer contains a superabsorbent expansion material; the protective layer is a thin film which can be dissolved after absorbing water; a bonding layer can bearranged between the matrix layer and the water-absorbing layer; and the matrix layer is preferred to be metal. The water-blocking belt is strong in water absorbing and blocking performance, less inlayer, simple and light in structure, high in water swelling multiple, high in water-absorbing efficiency and good in water blocking performance; influences on the using of the optical cables or the cables cannot be caused; and the water-blocking belt has advantages of shielding signals and preventing rats from biting.

The invention discloses a technique for preparing a suction plate of a hydrogen atom frequency marker. The suction plate is obtained by cutting a slot on a titanium rod, removing oil and cleaning, threading, cleaning, vacuum degassing, pressing and molding. The suction plate has the advantages that a large suction surface area is kept so as to ensure a high pumping rate, and the picking phenomenon of the existing non-evaporable suction plate for pressing powder in a using process is also avoided, meanwhile, the suction plate is a pure metal non-evaporable suction plate; the material source is simple, and various metal melting processes of an alloy suction plate are avoided; in addition, the process is simple and the manufacture is easy.

The invention discloses a layered coating type scratch-resistant coating reflecting film and a preparation method thereof. The scratch-resistant coating reflecting film comprises a reflecting base film, a mixed adhesive layer arranged on the reflecting base film and an elastic particle layer positioned on the surface of the mixed adhesive layer, the mixed adhesive layer coating liquid comprises the following components in percentage by mass: 10-15% of a polyacrylate adhesive, 20-30% of an organic silicon resin adhesive, 0.5-1% of a curing agent, 1-1.5% of a silane coupling agent and the balance of a solvent; the elastic particle layer coating liquid comprises the following components: 20-30% of elastic particles, 15-20% of a polyacrylate adhesive, 1-2% of a curing agent and the balance of a solvent. According to the invention, the mixed adhesive and the elastic particles are coated on the surface of the reflective base film in a layered manner, and the coated elastic particles can be half exposed on the surface of the coating through the viscosity difference of the two layers of coating liquid, so that the scraping resistance of the reflective film is improved, and the elastic particles are prevented from falling off at the same time.

The invention provides an edge rolling type thermal transfer ribbon for a printer and a manufacturing method thereof. The edge rolling type thermal transfer ribbon comprises a base film, a release layer, a thermal transfer printing ink layer and a heat resisting layer, wherein the thermal transfer printing ink comprises 10-30% by weight of resin, 0.5-4% by weight of additive, 10-20% by weight of pigment, and 50-70% by weight of solvent; the temperature of the solvent is increased, and thus the solvent is heated and the resin is dissolved to prepare resin liquid; the resin liquid is fully mixedwith the pigment and the additive and then is milled into the printing ink through a horizontal sand mill; a release coating coats the base film, and 3.2-4.0g of release coating coats the base film per square; the printing ink coats the surface of the release layer, and 1.8-2.5g printing ink coats the surface per square; and the heat resisting coating coats the other layer of the base film, and 0.1-1.0g of heat resisting coating coats the other layer per square. With the adoption of the thermal transfer ribbon, an image printed through the printer has the advantages of being high in resolution, resistant to friction, and resistant to ageing; the printing speed is up to 24inch/S, so that the requirement of ultrahigh-speed printing is met.