9results about How to "Reduce peeling" patented technology

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, an isolation structure, a first packaging layer and an etching barrier layer, wherein the isolation structure is arranged on one side of the substrate, a plurality of isolation openings are defined by the isolation structure, and the isolation openings are used for containing at least part of the light-emitting units; the first packaging layer is arranged on the side, away from the substrate, of the light-emitting unit; the etching barrier layer is arranged on the side, away from the substrate, of the first packaging layer. In the display panel, the first packaging layer and the light-emitting unit below are protected through the etching barrier layer, the thickness of the first packaging layer can be reduced, the production process can be accelerated, the productivity can be released, meanwhile, the photoresist thickness in the preparation process can be reduced, the photoresist stripping condition is reduced, the production efficiency and the product yield are improved, and the production cost is reduced. And the processing property of the display panel is improved.

This invention relates to the field of PCB manufacturing and packaging technology, and discloses a method and system for grouting high-density interconnect PCBs. The method includes the following steps: acquiring the board structure information and grouting area information of the high-density interconnect PCB, and determining grouting shrinkage-sensitive areas based on the board structure information and the grouting area information; performing a compression and flow-guiding treatment on the grouting shrinkage-sensitive areas to form a compression and flow-guiding structure; performing differentiated grouting treatment on the grouting area based on the compression and flow-guiding structure to form a grouting layer structure; and performing a segmented temperature-controlled curing treatment on the grouting layer structure to obtain a finished high-density interconnect PCB board. This invention reduces the risks of interface gaps, peeling, and insulation failure in the grouting layer of automotive high-density interconnect PCBs.

The composite base cloth comprises a surface layer and an inner layer from outside to inside, the surface layer comprises a first area, a second area, a third area and a fourth area, and the second area comprises a transverse concave area and transverse convex areas located on the two sides of the transverse concave area. The third area comprises a longitudinal concave area and longitudinal convex areas located on the two sides of the longitudinal concave area, the height of the first area is the same as the height of the transverse convex areas and the longitudinal convex areas, the height of the fourth area is the same as the height of the transverse concave areas and the longitudinal concave areas, and the fourth area comprises a first unit and a plurality of holes. The first area, the second area, the third area and the fourth area in the surface layer form a concave-convex structure, so that an uneven structure is formed on the surface of the base cloth, the leather coating can fill the concave part of the base cloth and wrap the convex part when the leather coating is cured on the concave-convex surface, the adhesive force between the leather coating and the base cloth is enhanced, and the service life of the leather coating is prolonged. And the leather coating permeates into the inner layer through the eyelets so as to be bonded with the two layers of the base cloth.

The application discloses a kind of high-temperature-resistant, acid and alkali-resistant acrylic pressure-sensitive adhesive and preparation method thereof, belong to pressure-sensitive adhesive technical field.The pressure-sensitive adhesive is made of 50-80 parts by weight of acrylic ester copolymer, 5-15 parts of 10-30nm SiO2 Nanoparticle, 1-5 parts of composite dispersant, 10-30 parts of ethyl acetate, 0.5-1.5 parts of crosslinking agent and 1-4 parts of silane coupling agent KH550.The preparation is first carried out by ultrasonic dispersion with coupling agent pretreatment, then composite dispersing liquid is prepared by adding composite dispersant, then it is fused with acrylic ester copolymer, and finally the finished product is obtained by adding crosslinking agent reaction.The application solves the problem of nanoparticle agglomeration by composite dispersion system, strengthens the interface combination by using coupling agent, balances the cohesive force and adhesive force by crosslinking agent, the product is resistant to high temperature up to 180 DEG C, after acid and alkali immersion, there is little residual glue, and it retains the excellent temperature bonding performance, suitable for many high-end scenarios.

Provided is a separator for a lithium secondary battery, the separator including: a porous polymer substrate; and a first binder layer formed on at least one surface of the porous polymer substrate and including a particulate type polyvinylidene fluoride (PVDF)-based binder polymer, wherein the first binder layer i) includes a caprolactone-based dispersant, or ii) has a surface roughness (Sa) of 0.12 µm to 0.22 µm.

The invention provides a positive plate, a preparation method and a battery. The positive plate comprises a positive current collector and a positive active material layer, the positive electrode active material layer comprises a first positive electrode active material layer and a second positive electrode active material layer which are sequentially arranged in the direction away from the surface of the positive electrode current collector, the first positive electrode active material layer comprises lithium nickel manganese oxide, and the second positive electrode active material layer comprises lithium nickel cobalt manganese oxide; the first positive electrode active material layer adopts lithium nickel manganese oxide, has a more stable crystal structure and stronger mechanical property, and can provide more stable adhesive force and a more stable interface as a bottom layer in contact with the positive electrode current collector, so that the overall mechanical property and thermal stability of the positive electrode plate are enhanced; the second positive electrode active material layer adopts low-cobalt nickel cobalt lithium manganate and can be in direct contact with an electrolyte, the capacity advantage of the second positive electrode active material layer is fully played, and meanwhile, the volume change of the second positive electrode active material layer is supported and constrained by a bottom layer stable structure, so that the cycling stability of a high-capacity material is remarkably improved.

The invention discloses a waterborne polyurethane anti-static mortar floor coating and a preparation method thereof, and belongs to the technical field of floor coatings. Mixing deionized water, a dispersing agent, water-based castor oil modified polyol resin and a defoaming agent to obtain a component A; mixing a curing agent and a diluent to obtain a component B; mixing cement, quartz sand, calcium hydroxide, a water reducing agent and a dry powder defoaming agent to obtain a component C; mixing the plasticizer, the conductive filler, the anti-static additive and the color paste to obtain a component D; sequentially mixing the component A, the component D, the component B and the component C to obtain the waterborne polyurethane anti-static mortar floor coating. The antistatic additive is prepared by the following steps: dispersing polydopamine coated halloysite powder in deionized water, adding sodium alginate and tin-doped zinc oxide coated titanium dioxide conductive particles, uniformly stirring, adding a cross-linking agent, carrying out a cross-linking reaction, and carrying out vacuum freeze drying. The antistatic property of the waterborne polyurethane mortar floor coating is improved by adding the antistatic auxiliary agent and the conductive filler in a synergistic manner.

The invention belongs to the technical field of optical fiber heat flux density sensing, and discloses a gradient strain coupling FBG heat flux density sensor preparation method, which mainly comprises an optical fiber microgroove processing technology, a metal bonding layer preparation technology based on a magnetron sputtering technology and a gradient strain coupling sensitive layer preparation technology based on an electroplating technology. The method is characterized in that a microgroove is prepared on the surface of the optical fiber through a hydrofluoric acid wet etching process to improve the bonding strength with a metal layer; a first metal layer with high bonding strength is prepared on the surface of the microgroove optical fiber through a magnetron sputtering process; and a gradient strain coupled second metal layer is prepared on the surface of the magnetron sputtering metal layer through a variable-diameter electroplating process. According to the method, the optical fiber microgroove structure and the oxyphilic metal material are corroded through hydrofluoric acid to improve the bonding strength of the optical fiber and the metal, the FBG spectrum is broadened through the second metal layer subjected to gradient strain coupling, the heat flux density sensing performance is optimized and improved, the method can be suitable for machining of various metalized FBG metal layer structures, the process flexibility is high, and the application range is wide. The depth of the microgroove, the thickness of each metal layer and the gradient strain characteristic of the outer metal layer can be flexibly controlled, the heterogeneous material bonding strength of the special metallized fiber is effectively improved, and the preparation cost of the special metallized FBG is reduced.

The invention relates to a display panel and a display device. The display panel comprises a display area and a non-display area. The non-display area comprises an open hole and a partition area, the partition area is located between the open hole and the display area, and the partition area surrounds at least part of the open hole. The display panel comprises a substrate layer, a planarization layer is arranged on the substrate layer in the display area, the planarization layer is provided with a first partition structure on the substrate layer in the partition area, and the first partition structure comprises a main top surface, a main bottom surface and a main side surface connected between the main top surface and the main bottom surface, the main top surface and the main bottom surface are opposite in the direction perpendicular to the plane where the display panel is located. The partition area further comprises a reinforcing structure, and the reinforcing structure makes contact with at least part of the side face of the first partition structure and makes contact with the substrate layer. According to the display panel, the reinforcing structures are arranged in the partition areas, and the first partition structures in the partition areas are optimized, so that the binding force of the film layers in the partition areas of the display panel is improved, the stripping problem between the film layers is reduced, and then the stability and reliability of the display surface are effectively improved.