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

The invention belongs to the field of thermal insulation materials and discloses a preparation method of an airgel blanket thermal insulation material. Mix orthosilicate, ethanol and water evenly, and add NH 4 Stir F solution and ammonia water evenly to obtain silica sol A; stir and mix resin, initiator, coupling agent, and hollow glass microspheres in a sealable container to obtain slurry B; Soak in the freshly prepared slurry B after taking it out, repeat the operation 3~4 times and the silica sol A is always in a stirring state when the fiber mat is dipped in the slurry B, then take out the fiber mat and place it in a vacuum The airgel blanket is sealed and left standing under the condition; the obtained fiber felt is subjected to aging and modification treatment, then solvent replacement is carried out with absolute ethanol, and then drying treatment and heat treatment are carried out to obtain the airgel felt heat insulation material. On the premise of not affecting the thermal insulation effect of the felt body, the invention overcomes the problem of powder falling off in the traditional silica airgel felt.

The invention discloses a cross-linked polyethylene insulated direct current cable for urban light rail subway, comprising a copper conductor, a cross-linked polyethylene insulating layer, an intumescent water-blocking tape, an aluminum-plastic bonded comprehensive protective layer, a low-smoke halogen-free flame retardant inner a protective layer, an anti-mouse ant layer and an outer sheath; the cross-linked polyethylene insulating layer covers the copper conductor, the intumescent water-blocking tape covers the cross-linked polyethylene insulating layer, the aluminum The plastic-bonded comprehensive protective layer is extruded and wrapped around the intumescent water-blocking tape, and the low-smoke halogen-free flame-retardant inner protective layer is wrapped with an aluminum-plastic bonded comprehensive protective layer. The low-smoke halogen-free flame retardant inner protective layer is wrapped around layer by layer, and the outer sheath is extruded and wrapped around the anti-mouse and ant layer; the compound antioxidant can prevent or slow down the degradation of the cross-linked polyethylene insulating layer. The self-oxidation reaction rate can delay the aging and degradation of the cross-linked polyethylene insulating layer, effectively improve the service life of the product, and at the same time improve the mechanical and electrical properties of the product.

The invention relates to a glitter powder noctilucent heat transfer printing ribbon. The glitter powder noctilucent heat transfer printing ribbon is composed of a base membrane, a heat-resisting back coating applied to one face of the base membrane, a releasing layer and an ink layer, wherein the releasing layer and the ink layer are applied to the other face of the base membrane. The thickness of the releasing layer ranges from 1.4 micrometers to 1.8 micrometers. The releasing layer is prepared from, by mass percent, 10-20% of a binder, 35-55% of wax and 30-45% of noctilucent powder. The thickness of the ink layer is controlled within 1.6-2.0 micrometers. The ink layer is prepared from, by mass percent, 10-20% of a binder, 20-35% of wax, 5-15% of pigment, 35-45% of glitter powder and 3-8% of an auxiliary. The glitter powder noctilucent heat transfer printing ribbon has the beneficial effects of being convenient to use, clean, free of contamination, economical and applicable, and meanwhile, on the aspect of performance, the glitter powder noctiluent heat transfer printing ribbon has the excellent characters of being high in transfer printing definition, high in recognition for naked eyes on visible light reflection, visible at night, high in scraping resistance, low in noise, high in blackness, free of powder falling of the coatings, and has relatively good application and popularization value.

The invention discloses a high-performance low-quantity dictionary paper and a preparation method thereof. The paper comprises a plant fiber layer and coatings arranged on both sides of the plant fiber layer. The basis weight of the paper is 22-30 g / m 2 , the pulp for preparing the plant fiber layer includes 45-65% bleached uncolored softwood pulp and 35%-55% bleached hardwood pulp, and the coating for preparing the coating is recorded in parts by weight, and the raw materials include: 200-300 parts modified filler, 40~60 parts retention aid, 1~2 parts water retention agent, 1~3 parts lubricant, 0.05~0.1 part defoamer, 5~10 parts sodium hydroxide and 500~1000 parts water. In the present invention, modified fillers are used in the coatings on both sides of the plant fiber layer, and the substances introduced on the surface of the modified fillers can react with the fibers so that the fillers and the fiber layers are firmly connected, and the retention rate of the fillers is improved; The color-forming substances in the ink prevent page break-through and deinking.

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 provides a preparation method of a ceramic composite lithium-ion battery separator, the preparation method at least includes: 1) mixing ceramic powder with a dispersant, adding it to a solvent, performing ball milling, and then adding a certain mass of polymer, light Curing the resin and the photoinitiator, and mechanically stirring to obtain an electrospinning solution; 2) providing a matrix film, and using the electrospinning solution to perform an electrospinning process to deposit nano ceramic fiber layers on both sides of the matrix film , to obtain a composite film after drying treatment; 3) using ultraviolet light to cure the composite film, and obtaining a ceramic composite lithium-ion battery diaphragm after drying treatment. The ceramic composite diaphragm prepared by the method of the present invention has the advantages of high electrolyte retention rate, high strength, high membrane rupture temperature, uniform pore size distribution, and difficult peeling of the matrix membrane and nano-ceramic fiber layer, which is conducive to improving the cycle stability of lithium-ion batteries. And high rate charge and discharge performance, suitable for power lithium-ion batteries.

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 provides a high-adhesive water-based polymer coated diaphragm and its preparation method and application. The preparation method steps are: polymer powder, dispersant, adhesive, thickener, surfactant and deionized Mix with water evenly to obtain a polymer coating slurry; coat the obtained polymer coating slurry on a polyolefin film, and dry to obtain a crude coated separator; soak the crude coated separator in the modifying solution , and rolling in the modifying solution to obtain a modified coating diaphragm; drying the obtained modified coating diaphragm to obtain a high-adhesive water-based polymer coating diaphragm. The high-adhesive water-based polymer coated separator prepared by the present invention significantly improves the adhesiveness of the coated separator, avoids the phenomenon of powder dropping, is beneficial to subsequent processes such as slitting and cell winding, and significantly improves the performance of the lithium-ion battery separator. Comprehensive performance.

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.