23results about How to "Improve peel force" patented technology

The invention belongs to the technical field of batteries, and particularly relates to a negative plate and a preparation method and application thereof. The negative electrode plate comprises a negative electrode current collector and a negative electrode material layer arranged on at least one side surface of the negative electrode current collector, the negative electrode material layer comprises a negative electrode active substance, a negative electrode conductive agent and a composite binder, and the composite binder comprises carboxymethyl cellulose lithium and siloxane. The negative electrode plate has relatively high stripping force or crack resistance, and the first coulombic efficiency or cycle stability of the battery can be effectively improved when the negative electrode plate is applied to the battery.

This invention provides a modified aqueous negative electrode, its preparation method, and its application. The modified aqueous negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed on the surface of the current collector. The negative electrode active material layer includes a negative electrode active material, a conductive agent, sodium alginate, waterborne polyurethane, and a pore-forming agent. The modified aqueous negative electrode of this invention solves both the raw material shortage problem of oil-based negative electrode formulations and the pain points of current aqueous negative electrode formulations, improving the slurry solids content, electrode porosity, and flexibility, while reducing electrode resistivity. Furthermore, this formulation is environmentally friendly, requiring no control of ambient humidity, and can significantly reduce production costs.

The invention discloses an acrylate pressure-sensitive adhesive capable of being tackified through UV irradiation and a preparation method and application of the acrylate pressure-sensitive adhesive, and belongs to the technical field of pressure-sensitive adhesives. The pressure-sensitive adhesive is composed of functional monomer o-nitrobenzyl (meth) acrylate, (meth) acrylate monomer and other components according to a specific mass ratio. The preparation method comprises the following steps: dropwise adding a mixture of an initiator and a solvent step by step, and carrying out temperature-controlled dark reaction. The core advantages are that the bonding force is switched according to needs: the initial stripping force is low, so that the alignment adjustment during the bonding of precise electronic components is facilitated, and the damage to a base material is avoided; after UV irradiation, the functional monomer is subjected to photolysis to generate polar groups, the stripping force is increased to 100 times or more of the initial value, strong bonding is achieved, and the pressure-sensitive adhesive is easy and convenient to operate, stable in performance, suitable for manufacturing of electronic components such as semiconductors and display modules and capable of meeting the stable bonding requirements of subsequent procedures such as grinding and cutting.

This invention discloses an adhesive, a negative electrode sheet, a method for preparing the same, a battery, a battery pack, and electrical equipment. The adhesive comprises styrene-butadiene rubber (SBR) particles, which include first SBR particles and second SBR particles. The ratio of the particle size Dv501 of the first SBR particles to the particle size Dv502 of the second SBR particles is K, where K ≥ 1.2. According to the adhesive of this invention, by controlling the particle size distribution of the adhesive, the bonding ability of the adhesive is improved, the overall bonding effect is enhanced, the peel force of the electrode sheet is increased, the structural stability of the electrode sheet using the above-mentioned adhesive is improved, the risk of delamination during use is reduced, and the service life of the electrode sheet is extended, thereby improving the cycle performance of the battery.

The invention relates to the technical field of high polymer materials, and discloses a polyester release master batch as well as a preparation method and application thereof. According to the release master batch, polyester resin is used as a matrix, specific modified organic silicon resin is introduced, and the organic silicon resin is prepared from polydimethylsiloxane containing silicon-hydrogen bonds, multiple hydrogen bond unit monomers containing unsaturated double bonds and fluorine-containing chain segment monomers through a hydrogen-silicon addition reaction. Multiple hydrogen bond groups and fluorine-containing alkyl chain segments are introduced to the same molecular chain at the same time, so that the resin is endowed with temperature responsiveness, excellent dispersity in a polyester matrix and ultralow surface energy after film formation. The polyester release master batch is prepared by adopting a melt blending extrusion process, and then the polyester release master batch and the polyester resin are blended and stretched to prepare the release film, so that the release film has stable and adjustable release force and excellent fingerprint resistance and pollution resistance, keeps good transparency and dimensional stability, and is suitable for the fields of electronic packaging, optical protection films, die cutting materials and the like.

The application discloses a coating, a composite brightening film and a preparation method thereof, and belongs to the field of high polymer materials. The coating comprises the following components in parts by weight: photocuring resin 30-60 parts, monofunctional photocuring monomer 30-60 parts, multifunctional photocuring monomer 2-10 parts and photoinitiator 1-10 parts, wherein the functionality of the multifunctional photocuring monomer is 3-6. The adhesive layer obtained from the coating has high peeling force, high temperature and humidity resistance, high brightness, is not prone to warping and adhesive opening after being attached, and the like, and the adhesive layer is suitable for preparing a composite brightening film, and can effectively improve the structural stability of the composite brightening film and make the composite brightening film maintain excellent brightening effect.

The present application relates to the technical field of lithium ion batteries, in particular to a lithium ion battery and a preparation method thereof. In the present application, the performance index k calculated by the mass fraction of the negative electrode conductive agent in the second negative electrode material layer, the mass fraction of the negative electrode binder in the first negative electrode material layer, the area density ratio of the second negative electrode material layer to the first negative electrode material layer and the mass fraction of the additive lithium difluoro(oxalato)borate in the electrolyte is compared with the set threshold value. The optimization of each mass fraction or area density ratio can provide accurate and quantifiable guidelines for the design of high-performance double-layer negative electrode batteries. Within the set threshold value range, the lithium ion battery with high peeling force (indicating good mechanical stability of the electrode sheet), excellent high-temperature storage performance and super-long cycle life can be obtained.

The invention belongs to the technical field of organic silicon release agents, and discloses a heavy stripping regulator for an organic silicon release film as well as a preparation method and application of the heavy stripping regulator. The modifier is prepared by condensation reaction of a branched polysiloxane oligomer and a hydroxyl-containing alkane monomer or polymer in a mass ratio of (0.4-2.5): 1 under catalysis of toluene and alkali at 60-120 DEG C for 2-8 hours, acid neutralization, filtration, drying and reduced pressure distillation to obtain a product. The branched polysiloxane oligomer is prepared by the following steps: pre-dissolving trifunctional silane and isopropanol, dropwise adding water, carrying out oxalic acid condensation, washing, and carrying out vacuum drying at 40-60 DEG C. The modifier is used for a solvent-free organic silicon release agent and is coated and cured to prepare release paper, the release force change amplitude under the aging condition of 70 DEG C is less than or equal to 25%, the residual adhesion rate is greater than or equal to 90%, the release force is increased along with the increase of the addition amount, the silicon transfer is small, and the release paper is suitable for a heavy stripping scene of a high-viscosity plane material.

The invention provides water-based ink for PVC (polyvinyl chloride) wood-grained paper and an application method of the water-based ink, and the water-based ink for the PVC wood-grained paper comprises the following components in percentage by mass: 1%-5.5% of a coloring agent, 2.5%-12% of hot-melt polyurethane, 3%-9% of acrylic resin and 3%-5% of isocyanate. The acid value of the hot-melt polyurethane is 15-30 mgKOH / g, and the acid value of the acrylic resin is 15-60 mgKOH / g. The ink realizes ultrahigh and lasting adhesive force on PVC grainy paper, has strong stripping force with a protective film, keeps good printing fluency, and effectively resists intrinsic aging factors such as plasticizer migration and the like.

The invention discloses a high-performance PVC foam adhesive tape and a preparation method thereof, and relates to the field of foam adhesive tapes, and the high-performance PVC foam adhesive tape sequentially comprises a release film layer, an adhesive layer I, a PVC foam layer and an adhesive layer II from bottom to top. Wherein the PVC foam layer is made of a PVC material, and the PVC material comprises the following raw materials in parts by weight: 70-80 parts of PVC resin, 15-20 parts of a plasticizer, 1-2 parts of a stabilizer, 3-5 parts of a foaming agent, 5-7 parts of a filler and 2-3 parts of functional montmorillonite. The raw materials such as the functional montmorillonite, the plasticizer and the stabilizer are used in a combined manner, so that the PVC foam layer has relatively high low-temperature impact resistance and ultraviolet aging resistance, and has relatively high interface adhesiveness with the adhesive layer I and the adhesive layer II. The PVC foam tape prepared by the invention has relatively high stripping force on base materials such as ABS, glass, steel plates and the like, and is high in ultraviolet aging resistance.

The utility model relates to the technical field of lithium ion batteries, in particular to a negative pole piece which comprises a current collector, a bottom coating and an active layer which are sequentially stacked from bottom to top, the bottom coating comprises a current collector bonding bottom coating and a water-resistant bottom coating which are arranged from bottom to top. According to the negative pole piece provided by the utility model, the double-layer composite bottom coating is adopted, and the water resistance of the bottom coating is improved while the bonding force between the bottom coating and the current collector and the bonding force between the active layer and the bottom coating are improved, so that the high stripping force of the negative pole piece is realized, the phenomenon of negative pole stripping during high-speed charging is avoided, and the service life of the negative pole piece is prolonged. And the thermal runaway risk during high-power charging and discharging is reduced.

The invention provides a high-adhesion water-based resin coating material suitable for decorative paper as well as a preparation method and application of the high-adhesion water-based resin coating material, and belongs to the technical field of resin materials. Comprising the following raw materials: 20-80 parts of water-based resin, 1-10 parts of an organic filler, 0.5-5 parts of a cross-linking agent, 0.1-1 part of a leveling agent, 0.1-3 parts of a wetting dispersant, 0.1-1 part of a defoaming agent, 1-20 parts of a pigment, 1-10 parts of an auxiliary agent and 10-60 parts of water. Wherein the water-based resin is prepared from water-based acrylic acid modified epoxy ester and a water-based polyurethane dispersion; the cross-linking agent is a water-based blocked isocyanate cross-linking agent. By optimizing the raw material formula, the prepared coating material can better meet the requirements of gravure printing of decorative paper, and has the advantages of being environmentally friendly, high in adhesive force, high in stability and the like.

The invention discloses a prime coat copper foil for improving stripping and cycle performance of a negative pole piece and a preparation method of the prime coat copper foil, and relates to the technical field of current collectors. The preparation method comprises the following steps: adding magnesium lithium silicate and ammonium carbonate into prime coating slurry, and then coating a copper foil with the prime coating slurry to obtain a prime-coated copper foil; after surface carboxyl of magnesium lithium silicate and oxygen-containing groups of polyacrylic acid are compounded, a large number of high-strength hydrogen bonds are formed, and when a negative electrode generates huge expansion stress in the circulation process, a hydrogen bond network between magnesium lithium silicate nanosheets and a polymer is broken, absorbs energy and buffers the structural change of an active material, so that the circulation performance of a battery end is improved; ammonium carbonate is heated and decomposed into NH3 and CO2, gas escapes and leaves nanoscale pores in the coating, on one hand, the gas can generate a stronger anchoring effect with a negative electrode active material to improve the stripping force of a pole piece, and on the other hand, the pores can serve as buffer pores to inhibit volume expansion of silicon particles during lithium intercalation and improve the cycle performance.

The invention relates to a secondary battery and an electric device, and belongs to the technical field of batteries. According to the secondary battery provided by the invention, the first lithium supplementing layer and the second lithium supplementing layer are sequentially arranged on at least one surface of the positive electrode current collector, the first lithium supplementing layer comprises the first lithium supplementing agent, the second lithium supplementing layer comprises the second lithium supplementing agent, and the average particle size P1 of the first lithium supplementing agent is smaller than the average particle size P2 of the second lithium supplementing agent. The first lithium supplementing layer and the second lithium supplementing layer are arranged on the surface layer of the positive electrode current collector, so that a lithium supplementing agent can be prevented from reacting with slurry to generate gel, the stripping force of a pole piece is improved, and the compaction density of the lithium supplementing layer can be improved while the conductivity of the lithium supplementing layer is ensured, so that the first coulombic efficiency of the battery can be effectively improved, and the service life of the battery is prolonged. And the energy density and the cycle performance are improved.

The application belongs to the technical field of dust removal, and specifically discloses a calcium carbide furnace flue gas dust removal device, which comprises two supporting frames, two bag-type dust removal units and a plurality of desulfurization units, three groups of ash hoppers are communicated and installed at the lower part of the interiors of the two bag-type dust removal units, the two bag-type dust removal units are respectively installed in the interiors of the two supporting frames, connecting pipes are equidistantly installed at the upper part of the interiors of the two bag-type dust removal units along the horizontal direction, a dust guide pipe is jointly communicated and installed at the end of the connecting pipes away from the bag-type dust removal units, an ash inlet pipe is communicated and installed at one end of the dust guide pipe, and a lifting mechanism driven by a motor is additionally arranged on the basis of a pulse spraying system. The bag is synchronously lifted by the winding roller, the pull rope and the connecting column to form a pair of bags, so that the bags are extruded with each other and are in contact with the arc-shaped scrapers and the elastic rollers on the two sides of the bags in the lifting process, and scraping and vibration are generated.

The present application relates to the technical field of photovoltaic packaging materials, and discloses a white photovoltaic packaging adhesive film, a preparation process thereof and a photovoltaic module. The white photovoltaic packaging adhesive film has a multilayer composite structure, including a corrosion-resistant layer facing a photovoltaic cell, a reflective layer and an adhesive layer facing a photovoltaic backboard. The corrosion-resistant layer includes a low-polarity POE resin and / or an EVA resin with a VA content of less than or equal to 10%. The reflective layer includes a specific amount of EVA resin with a VA content of 15-25%, white pigment and insulating reinforced nano filler. The adhesive layer includes EVA resin with a VA content of 30-40% and composite silane coupling agent (including vinyl silane and isocyanate silane compounded at a mass ratio of 1-5:1) prepared at a weight ratio of 100:0.1-2. The white photovoltaic packaging adhesive film has the advantages of high reflectivity, high body resistance, strong peeling strength and peeling strength after hygrothermal aging, excellent corrosion resistance and PID resistance, and no white overflow.

The utility model provides a kind of creping knife.The creping knife includes base body, the end of the base body forms first end face, coating is arranged on the first end face, one side of the base body is equipped with inner arc chamfer, the inner arc chamfer makes the base body form second end face, third end face and fourth end face, the second end face and fourth end face are respectively connected in the both ends of inner arc chamfer, and the third end face is connected between first end face and fourth end face;The other side of the base body width direction Y is equipped with fifth end face;Angle γ is formed between the second end face and fifth end face, angle β is formed between the third end face and fifth end face, the third end face has length W, the first end face and fifth end face have angle α0, the coating and fifth end face have angle α, and the end of the fourth end face and the center of inner arc chamfer have height h.The utility model can prolong the service life of creping knife, and improve paper creping quality.

The invention discloses a modified polypropylene base film, a functional copper current collector and a preparation method of the functional copper current collector, and relates to the technical field of functional current collector base films. The raw materials of the modified polypropylene base film comprise a crosslinking master batch and an initiator; the crosslinking master batch comprises pentaerythritol tetraacrylate and polypropylene in a mass ratio of 1: (5-15); the addition amount of the initiator is 0.2-0.4 wt% of the cross-linked master batch. The modified polypropylene-based film prepared by the invention has strong interface bonding force with a metal copper layer, and the functional copper current collector prepared based on the modified polypropylene-based film has excellent stripping force and mechanical strength.

A folding piece type geocell tenon-and-mortise structure and a geocell relate to the technical field of geocells, the folding piece type geocell tenon-and-mortise structure comprises a socket and an insertion rod, the socket comprises a bottom plate, two limiting pipes are arranged on the bottom plate, four guide holes are formed in the bottom plate, insertion clamping groove holes are formed in the bottoms of the guide holes, the insertion rod comprises a cross plate, and the cross plate is connected with the insertion rod. Four connecting rods are arranged at the bottom of the cross plate, and clamping heads are arranged at the ends of the connecting rods. According to the utility model, the clamping head is matched with the insertion clamping groove hole, so that the insertion rod is firmly connected with the insertion seat, and the stripping force and the constraining force of the geocell are improved. The sheet does not need to be punched or welded, so that the damage to the body structure of the sheet is avoided, and the original strength of the sheet is kept. And the production process is simple, complicated punching and welding procedures are not needed, the production efficiency is improved, and the cost is reduced. The insertion fixing mode is convenient to operate, and site construction and installation are facilitated.

This invention provides an encapsulating film with light conversion effect and its preparation method, belonging to the field of photovoltaic technology. An encapsulating film with light conversion effect is characterized by comprising the following components by weight: 80-97 parts of matrix resin, 0-2 parts of main crosslinking agent, 0-1 part of co-crosslinking agent, 0-1.5 parts of coupling agent, 0-0.5 parts of light stabilizer, 0-1 part of low-acid additive, 0-2 parts of anti-PID additive, and 0.05-2 parts of light conversion agent. This invention utilizes nano-inorganic oxide light conversion agents, such as nano-silica, nano-zinc oxide, and their derivatives, added to the photovoltaic encapsulating film. These nano-inorganic oxide light conversion agents have stable inorganic crystalline structures that do not deteriorate or fail during long-term use. Modifying and coating these nano-inorganic oxide light conversion agents improves dispersion and enhances the peel force between the agent and the solar cell. Furthermore, their excellent light conversion and migration resistance, through changes in crystal structure, can convert ultraviolet light into different wavelengths of color, thus protecting the solar cell and further enhancing the aesthetic appearance of the module.

This application provides a secondary battery and an electrical device. The secondary battery includes a positive electrode sheet, which includes a positive current collector, a first positive active layer disposed on at least one surface of the positive current collector, and a second active layer disposed on the side of the first active layer opposite to the positive current collector. The first active layer and the second active layer each independently include a positive active material, a binder, and a conductive agent. The binder includes PVDF-g-PAALi, satisfying: Nw1 > Nw2, where Nw1 represents the weight-average molecular weight of PVDF-g-PAALi in the first active layer, and Nw2 represents the weight-average molecular weight of PVDF-g-PAALi in the second active layer; G1% < G2%, where G1% represents the PAALi grafting rate of PVDF-g-PAALi in the first active layer, and G2% represents the PAALi grafting rate of PVDF-g-PAALi in the first active layer.