36results about How to "Reduce transmittance" patented technology

The application relates to the technical field of packaging materials, in particular to a high-strength flame-retardant packaging material and a preparation method thereof. According to weight parts, the packaging material comprises the following raw materials: 70-90 parts of polylactic acid, 6-12 parts of polybutylene adipate terephthalate, 4-15 parts of a flame retardant, 3-7 parts of modified montmorillonite, 3-5 parts of maleic anhydride grafted polypropylene, 0.3-0.5 parts of an antioxidant and 0.5-1 part of a lubricant. The packaging material has excellent flame-retardant performance, bacteriostatic performance, barrier performance and mechanical performance.

Provided is a polarizing plate in which the decrease in transmittance in a high-temperature environment is suppressed. Provided is a polarizing plate having a polarizing element in which a dichroic dye is adsorbed to a polyvinyl alcohol-based resin layer and oriented, and a transparent protective film laminated to at least one face of the polarizing element, the polarizing element and the transparent protective film being bonded via an adhesive layer formed by an adhesive containing an ammonium ion donor, the water content of the polarizing element being equal to or higher than the equilibrium water content at a temperature of 20°C and a relative humidity of 30% and equal to or lower than the equilibrium water content at a temperature of 20°C and a relative humidity of 50%.

The application discloses a modified layered nanoclay sheet / polyurethane composite coating and a preparation method thereof, and belongs to the technical field of coatings; namely, the modified layered nanoclay sheet and polyurethane are used to prepare the modified layered nanoclay sheet / polyurethane composite coating by adopting a physical crosslinking method; wherein the modified layered nanoclay sheet is prepared by sequentially performing acid activation and surface modification treatment on nanoclay. The application solves the problems of insufficient weather resistance and adhesion and poor storage stability of the existing polyurethane coating, and also reduces the cost. In addition, the modified layered nanoclay sheet / polyurethane composite coating prepared by the application has excellent corrosion resistance and mechanical properties.

The present invention discloses a low dielectric constant multifunctional electronic moisture-proof coating composition, and relates to the technical field of electronic materials and protective coatings, the composition comprises: a component A: 15-35% of a reaction type fluorine-silicon hybrid oligomer; the component B comprises 2%-8% of surface modified nanosheet barrier filler; the component C comprises 50%-75% of a green cosolvent system; the component D comprises 0.5%-3% of a multifunctional epoxy silane coupling agent; and the component E comprises 1%-5% of a photo-thermal dual-curing initiation system. The problems that in the prior art, the VOC emission of a fluorine-containing solvent is high, the compactness is insufficient due to filler sedimentation, and the water vapor permeability is high in a high-damp-heat environment are solved, through the quaternary synergistic effect, the low dielectric constant, high hydrophobicity, excellent moisture resistance and high adhesive force to various base materials are achieved, and the water-based paint is suitable for protection of high-frequency electronic devices.

The application relates to the technical field of food packaging materials, and discloses an antibacterial taro silk cake food packaging bag and a preparation method thereof. The antibacterial taro silk cake food packaging bag comprises an inner laminating layer and an outer functional layer. The preparation method of the antibacterial taro silk cake food packaging bag is as follows: prepared inner laminating layer material and outer functional layer material are respectively added into two hoppers of a two-layer co-extrusion blow molding machine, the extrusion temperature of the inner laminating layer is set to 160-180 DEG C, the extrusion temperature of the outer functional layer is set to 180-200 DEG C, the composite film is obtained by blow molding after head compounding, the composite film is cut into the required size, and then heat sealing is carried out under the conditions that the heat sealing temperature is 140-150 DEG C and the heat sealing time is 2-3 seconds to obtain the antibacterial taro silk cake food packaging bag. The antibacterial taro silk cake food packaging bag has good mechanical, barrier and antibacterial properties.

The invention provides an X-ray composite radiation shielding material and a preparation method and application thereof, and belongs to the technical field of radiation protection. The photoelectric effect and the scattering effect of X-rays in the material are remarkably enhanced by using high atomic number elements contained in the metal oxide, so that the transmittance of the X-rays is effectively reduced. Meanwhile, the oxide material has good chemical stability and environmental friendliness, and the toxicity and aging problems caused by a traditional lead-based shielding material can be avoided. The prepared composite radiation shielding material has the advantages of being low in cost, light in weight, easy to process, good in flexibility, non-toxic, environmentally friendly and the like, the shielding efficiency of an X-ray shielding coating reaches up to 70% or above when the X-ray photon energy is 70 kV or below, and the generated secondary reflectance can be reduced by 35-80% compared with lead.

The invention discloses a composite thermochromic film as well as preparation and application thereof. The composite thermochromic film is prepared from tungsten-doped vanadium dioxide, polyvinyl alcohol and paraffin. The film can be tightly adhered to an adhesion surface, and has a function of adjusting the transmissivity of visible light and near-infrared light.

The application discloses a method for preparing a conjugated Schiff base in situ on cotton fabric and application thereof, and utilizes sodium periodate to oxidize cotton fabric to obtain aldehyde fiber, and then forms a loaded conjugated Schiff base cotton fabric in situ on the aldehyde fiber through a p-phenylenediamine and glyoxal polycondensation reaction, tests the UPF, tensile breaking strength, crease recovery angle and contact angle of the cotton fabric before and after finishing to represent changes in ultraviolet resistance, tensile property, crease recovery and hydrophilicity of the cotton fabric. + The in-situ grafting process of the cotton fabric has a smaller influence on the strength of the cotton fabric, and the crease recovery angle and the contact angle of the finished cotton fabric are obviously increased.

Disclosed are a display substrate and a packaging method of the display substrate. The display substrate comprises a substrate, a plurality of light emitting devices, a light absorbing layer, a light transmitting layer, and a transparent protective layer. The plurality of light emitting devices are arranged on the substrate with a spacing region between adjacent light emitting devices; the light absorbing layer is located at least in the spacing region; the light transmitting layer is continuously arranged on the side of the light absorbing layer away from the substrate and the side of the light emitting device away from the substrate; the transparent protective layer is arranged on the side of the light transmitting layer away from the light absorbing layer; wherein the plurality of light emitting devices comprise a first light emitting device, a second light emitting device, and a third light emitting device, the spacing between the first light emitting device and the second light emitting device is smaller than the spacing between the second light emitting device and the third light emitting device, and the difference between the minimum thickness of the light absorbing layer in the spacing region between the first light emitting device and the second light emitting device and the minimum thickness of the light absorbing layer in the spacing region between the second light emitting device and the third light emitting device is less than or equal to 2.0 μm.

The application discloses a high-transmittance flexible transparent conductive film based on a double-sided antireflection technology and a preparation method thereof. A SiO2 2D photonic crystal antireflection layer is prepared on a polymer substrate surface of the flexible transparent conductive film by using a gas-liquid interface self-assembly method, and a high-molecular doped metal oxide antireflection layer is prepared on a transparent conductive layer surface by using a solution spin coating method, so that the reflectivity of incident light on the polymer substrate surface and the reflectivity of outgoing light on the transparent conductive layer surface are simultaneously reduced. The average transmittance of the flexible transparent conductive film is increased by 10%, the obtained high-transmittance flexible transparent conductive film has good mechanical bending performance, the vacuum and high-temperature annealing process is avoided in the preparation process, and the preparation of a large-area high-transmittance flexible transparent conductive film is facilitated.

A solar dark green glass is provided in the present disclosure. The solar dark green glass includes a glass basic component and a glass tinted component. The solar dark green glass manufactured has a thickness of 1.6mm-2.1mm, and solar direct transmittance less than or equal to 65%, infrared transmittance less than or equal to 45%, and ultraviolet transmittance less than or equal to 35%. According to the present disclosure, the solar direct transmittance, the infrared transmittance, and the ultraviolet transmittance of the glass can be reduced while the thickness of the glass is thinned.

This invention belongs to the field of image transmission fiber technology and discloses a bend-insensitive high-resolution image transmission fiber and its fabrication method. The image transmission fiber provided by this invention comprises several image transmission cores and a co-cladding layer between the image transmission cores; each image transmission core includes, from the inside out, a core layer, a recessed layer, an inner cladding layer, and a light-absorbing layer; the light-absorbing layer is quartz glass containing absorber ions and fluorine. The fabrication method of the image transmission fiber provided by this invention includes preparing a light-absorbing core rod, drawing the light-absorbing core rod to obtain a light-absorbing capillary rod, stacking several light-absorbing capillary rods in a pure quartz glass sleeve to obtain an image transmission fiber preform, and drawing the image transmission fiber preform to obtain a bend-insensitive high-resolution image transmission fiber. This invention can improve the imaging resolution of the image transmission fiber, and the fabrication method has the advantages of simple and convenient process and strong production stability.

The utility model discloses a combined type transparent substrate with a heat insulation layer and a combined type transparent substrate system. The combined type transparent substrate with the heat insulation layer comprises a first transparent substrate and a second transparent substrate which are arranged in a stacked mode. The first transparent substrate is provided with a first inner surface facing the second transparent substrate and a first outer surface deviating from the second transparent substrate, and the second transparent substrate is provided with a second inner surface facing the first transparent substrate and a second outer surface deviating from the first transparent substrate; the combined type transparent substrate of the heat insulation layer further comprises a light blocking layer, a light adjusting layer and a heat blocking layer which are arranged together at the same time. One or more of the light blocking layer, the light adjusting layer and the heat blocking layer are arranged on one or more of the first inner surface, the first outer surface, the second inner surface and the second outer surface, and the heat insulation effect can be remarkably improved.

The invention relates to the technical field of microbial feed additives, and discloses a feed lactic acid bacteria additive and a preparation method thereof.The preparation method comprises the steps that lactobacillus plantarum and / or enterococcus faecalis are / is used as strains for activation and expanding culture, agricultural and sideline product waste is used as a substrate for liquid-state deep fermentation, and mature fermentation liquor is obtained; mixing the mature fermentation liquor with a composite protective agent containing double essential oil, chitosan, theabrownin and porous silicon dioxide, granulating, and pre-drying at low temperature to obtain a semi-dry particle core; and coating with kappa-carrageenan / konjac glucomannan / phytosterol ester composite gel, drying and packaging to obtain a finished product. The double essential oils, the chitosan and the theabrownin are combined to form a full-spectrum active antibacterial system; the elastic composite gel outer layer realizes dual protection of liquid water and water vapor; porous silicon dioxide actively maintains low water activity of particles to prevent lactic acid bacteria from being recovered in advance; the product has the advantages of high viable count, strong heat and acid resistance and excellent storage stability.

This invention relates to a near-infrared shielded thermochromic smart window and its fabrication method, belonging to the fields of radiative cooling and smart windows. The invention aims to solve the problems of high near-infrared transmittance and low mid- and far-infrared thermal radiation modulation amplitude in existing thermochromic smart windows. The near-infrared shielded thermochromic smart window comprises, from bottom to top, a substrate, a hyperbolic metamaterial structure, a first oxide dielectric layer, and a VO2 metasurface layer. The fabrication method includes: 1. Cleaning the substrate; 2. Fabrication of the hyperbolic metamaterial structure; 3. Fabrication of the first oxide dielectric layer; 4. Fabrication of the VO2 metasurface layer. This invention relates to a near-infrared shielded thermochromic smart window and its fabrication method.

The invention discloses a bacteriostatic damp-proof aluminum foil composite film for packaging and a preparation method thereof, and belongs to the technical field of packaging materials. And connecting the outer layer with one side of the aluminum foil through an adhesive, connecting the other side of the aluminum foil with the heat sealing layer through an adhesive, and curing to obtain the antibacterial and damp-proof aluminum foil composite film for packaging. The preparation method of the adhesive comprises the following steps: taking a soft-segment main body, a hard-segment main body, a hydrophilic chain extender and a soft-segment modifier for prepolymerization, adding a short-chain chain extender and a long-chain chain extender, continuously stirring, adding a cross-linking agent, continuously stirring, cooling, adding a neutralizer, stirring, adding deionized water, and uniformly stirring and dispersing at a high speed to obtain a modified polyurethane emulsion; and uniformly mixing and dispersing the modified polyurethane emulsion, antibacterial particles, a wetting agent, a defoaming agent and an antioxidant to obtain the adhesive. The antibacterial particle is a coating particle which takes polyvinyl imidazole modified nano zinc oxide as a core and chitosan as a shell; the antibacterial and moisture-proof performance of the aluminum foil packaging film is improved.

This invention discloses a simplified U-shaped beam inverter, relating to the field of high-power laser technology. It includes a collimating lens (102), a right-angle mirror, an electro-optic switch (105), and a focusing lens (106). The right-angle mirror consists only of a first reflecting mirror surface (103) and a second reflecting mirror surface (104) that are perpendicular to each other, both of which form a 45° angle with the beam transmission direction. The entire right-angle mirror is rotated 45° about the beam transmission direction to simultaneously achieve a 90° symmetrical rotation of the near-field wavefront and polarization state of the beam. The beam inverter is placed directly behind the filter aperture array plate (101), eliminating the need for additional reflecting mirrors or wedge mirrors to guide the beam into and out of the main optical path. By rotating the entire right-angle mirror by 45°, this invention enables a simplified structure with only two reflecting surfaces to have wavefront rotation functionality. This allows the entire inverter module to be directly integrated into a sealed optical path, significantly simplifying the structure, reducing the number of optical components, improving system cleanliness and damage resistance while maintaining functional integrity. It is suitable for high-power laser amplification systems.

The present application provides a polarizing film, which has transparent protective films attached to both sides of a polarizing film, the polarizing film being formed by adsorbing iodine to a polyvinyl alcohol-based film and orienting it, and having an iodine concentration of 6% by weight or more, and the moisture permeability of at least one of the transparent protective films being 200 g / (m 2 24h) or less, the polarizing film satisfying the condition that the change amount (ΔTs) of the monomer transmittance represented by the general formula (1): ΔTs(%) = Ts 750 Ts0 is 0% or more and 5% or less. The initial degree of polarization of this polarizing film is good, and the effects of suppressing the decrease in monomer transmittance due to the coloring of the polarizing film in a high-temperature environment are also excellent, and furthermore, the effects of suppressing the decrease in the degree of polarization in a high-temperature high-humidity environment (moisture resistance) are excellent.

The application provides a display screen and a display device, and relates to the technical field of display. The display screen comprises a display module, a first electrode layer, an insulating boss, an electrochromic layer and a second electrode layer. The display module comprises a pixel layer and a first packaging layer, the pixel layer comprises pixel units, and the first packaging layer covers the pixel layer; the first electrode layer is arranged on the side of the first packaging layer away from the pixel layer in a laminated manner, the first electrode layer comprises a middle region and an edge region surrounding the middle region, the orthographic projection of the pixel unit on the first electrode layer is located in the middle region; the insulating boss is protruded on the surface of the side of the middle region away from the display module, a plurality of insulating bosses correspond to a plurality of pixel units one by one; the electrochromic layer covers the insulating boss, the region of the middle region not occupied by the insulating boss and the edge region; and the second electrode layer is arranged on the side of the electrochromic layer away from the display module in a laminated manner. The display screen of the application has a good anti-peeping effect and does not need to be replaced frequently.

The invention belongs to the technical field of optical microscopic imaging, and particularly relates to a single objective lens light sheet microscopic imaging system, which comprises an exciting light modulation light path, a fluorescence detection light path and a microscopic imaging system, and is characterized in that the exciting light modulation light path is used for generating an illumination light sheet to excite fluorescence, and specifically comprises a laser, a beam expanding collimating lens group, a modulator, a scanning system and the like. The microscopic imaging system is used for transmitting an illumination light sheet and collecting light emitted by a sample, and comprises a dichroscope, a galvanometer module, an image rotating system, a tubular lens, an objective lens and the like. And the fluorescence detection light path comprises a relay lens group, a modulation element, a band-pass optical filter, a camera and the like. According to the invention, tasks of light sheet illumination and fluorescence collection in a traditional double-objective light sheet microscope are completed through a single objective, a remote focusing system or a micro-mirror reflection structure commonly used in an existing single-objective light sheet microscope does not need to be used, and a light sheet orthogonal to a focal plane is adopted for illumination. Compared with the existing light sheet microscope technology, the method has higher usability and flexibility, allows free switching of objective lenses under the condition of not changing other light paths, is compatible with any objective lens and various samples, does not need any software processing including deskewing in the principle of an obtained image, can directly display and use an original image, and is high in practicability. The system has higher resolution and is close to ideal isotropic imaging when various objective lenses are used for imaging.

This invention relates to a method for fabricating an electrically driven active VO2 / MXene metasurface terahertz modulator, utilizing a vacuum filtration method to prepare an MXene thin film. The MXene metasurface is fabricated using a laser direct writing method. A vanadium dioxide thin film is fabricated using magnetron sputtering. The vanadium dioxide thin film on a quartz substrate is completely immersed in a buffered oxide etchant (BOE). Using the prepared MXene metasurface, a self-supporting vanadium dioxide thin film is retrieved from water, suspending the vanadium dioxide film on the MXene metasurface. The VO2 / MXene composite metasurface is then left to stand for 1 hour to allow them to bond and dry, resulting in the VO2 / MXene composite metasurface. The MXene metasurface offers advantages such as high flexibility and ease of fabrication. The VO2 / MXene terahertz modulator features actively controllable terahertz waves, high modulation depth, and low trigger power.

This invention discloses a high-barrier composite blown film of EVOH / organically modified mica powder and its preparation method, belonging to the field of polymer composite materials and food packaging technology. The composite blown film consists of 90-99 parts by weight of blow-molding grade ethylene-vinyl alcohol copolymer and 1-10 parts by weight of organically modified mica powder. The organically modified mica powder is obtained by surface modification of muscovite powder with silane coupling agent KH-570, with the amount of KH-570 being 1.5-3.0 wt% of the mass of the muscovite powder. In the preparation process, muscovite powder is first added to an alcoholic aqueous solution of KH-570, stirred, filtered, washed, and dried to obtain organically modified mica powder; then, dried EVOH and organically modified mica powder are premixed and melt-blended and granulated using a twin-screw extruder; finally, the composite granules are blown into a film. This invention utilizes the high aspect ratio and hydrophobic surface of organically modified mica powder to form a tortuous path effect in the EVOH matrix, significantly reducing oxygen and water vapor permeability. It exhibits good thermal stability, simple process, and is suitable for barrier packaging of lipid-based foods.

The present application aims to provide a polarizing plate in which the decrease in transmittance in a high-temperature environment is suppressed. According to the present application, a polarizing plate can be provided which has a polarizing element in which a dichroic dye is adsorbed and oriented in a polyvinyl alcohol-based resin layer, and a transparent protective film laminated to at least one face of the polarizing element, the polarizing element and the transparent protective film being bonded with an adhesive layer formed from an adhesive containing a blocked isocyanate compound, the water content of the polarizing element being equal to or higher than the equilibrium water content at a temperature of 20°C and a relative humidity of 30%, and equal to or lower than the equilibrium water content at a temperature of 20°C and a relative humidity of 50%.

The application discloses a kind of for semiconductor processing cavity's transmission cover plate and preparation method thereof, semiconductor processing equipment.The transmission cover plate has opposite first surface and second surface, first surface is towards radiation source, transmission cover plate includes: window, can transmit heat radiation;Outer edge, which surrounds the periphery of the window, includes first outer edge and second outer edge stacked on each other, first outer edge is away from radiation source, and second outer edge is close to radiation source;And barrier layer, which is located at least between first outer edge and second outer edge;The transmissivity of window and first outer edge is identical, and the transmissivity of second outer edge is less than the transmissivity of first outer edge.The application blocks the impurities released by outer edge at high temperature from penetrating into window and polluting window by setting barrier layer, ensures the stability of infrared transmittance, anti-deformation and other performances of transmission cover plate, and prolongs service life.

The invention discloses a preparation method of a silicon-based antibacterial agent and application of the silicon-based antibacterial agent in preparation of a thin film, and the preparation method comprises the following steps: adding mesoporous silica and 3-aminopropyltriethoxysilane into a container filled with dry toluene, carrying out reflux stirring at 90 DEG C for 24 h, and cooling to room temperature after the reaction is complete, so as to obtain the silicon-based antibacterial agent. Washing with dry toluene, and carrying out vacuum drying to obtain aminated mesoporous silica; the preparation method comprises the following steps: mixing caffeic acid, 1-ethyl-(3-dimethylaminopropyl) carbodiimide, N-hydroxysuccinimide and deionized water, and ultrasonically activating carboxyl at room temperature; after ultrasonic treatment is finished, adding mesoporous silica, stirring at room temperature, centrifugally washing with absolute ethyl alcohol, and drying in vacuum to obtain a light brown powdery product, namely the silicon-based antibacterial agent. The thermal degradation rate of the ASBACA / PVA antibacterial composite film in the degradation stage is lower than that of a pure PVA film, and the thermal degradation temperature of the ASBACA / PVA antibacterial composite film in the degradation stage is higher than that of the pure PVA film, so that the thermal stability of the PVA film is possibly enhanced through the interaction between PVA and the antibacterial agent ASBACA.

The application relates to the technical field of optical filters, and discloses an electronic ND filter based on liquid crystal dimming and a control method thereof. The filter comprises a shell, an electronic ND liquid crystal screen and a control circuit. The electronic ND liquid crystal screen is provided with a first liquid crystal dye layer containing dye-doped liquid crystal. The control method comprises the following steps: obtaining a target transmittance gear instruction and mapping a target driving voltage; the control circuit outputs an alternating square wave driving voltage with a positive and negative level maintenance time ratio of 1:1 to the first liquid crystal dye layer; the arrangement angle of liquid crystal molecules is changed to adjust the light transmittance; when the system is not powered, the initial arrangement direction of the liquid crystal molecules is orthogonal to the initial polarization direction of the polarizing film, and the lowest transmittance is output; the filter is provided with a 1 / 4 lambda wave plate clamped between the two liquid crystal dye layers, and the wave plate is used for absorbing internal interface reflected light by using the polarization state conversion effect of the wave plate. The application eliminates the stray reflection of the structural interface, prevents the polarization failure of the liquid crystal molecules, and provides power-off light shielding protection.

The present application provides a polarizing film, which is formed by adsorbing iodine to a polyvinyl alcohol-based film and orienting it, has an iodine concentration of 3% by weight or more and 10% by weight or less, and in a produced gas analysis method, the peak temperature of the maximum intensity of water detected in the presence of an inert gas at a temperature increase rate of 10°C / min and a temperature increase range of 40°C to 350°C is 205°C or higher. The polarizing film has a good initial degree of polarization, and is also excellent in the effect of suppressing a decrease in monomer transmittance caused by coloring of the polarizing film in a high-temperature environment.

This application discloses a GPPS composite material, its preparation method, and its application, relating to the field of polymer materials technology. This application provides a GPPS composite material comprising the following components in parts by weight: 70-95 parts GPPS resin (general-purpose polystyrene), 5-25 parts polyvinylpyrrolidone, and 0.1-0.5 parts inorganic mineral powder; wherein the particle size D50 of the inorganic mineral powder is 380-490 nm. This application yields a GPPS composite material that can reduce the blue light transmittance in LED lights without affecting luminous efficacy.

The application discloses a production process of a co-extrusion bidirectional stretching UV-resistant printing reflective film and relates to the technical field of reflective film preparation.The production process comprises the following steps: S1, raw material preparation; S2, co-extrusion casting; S3, bidirectional stretching; S4, surface treatment; and S5, winding.The production process of the co-extrusion bidirectional stretching UV-resistant printing reflective film adopts the "organic foaming agent and inorganic nucleating agent synergistic effect" technology to build a uniform microporous structure with a pore diameter of 0.5-3 microns in the core layer (A).The microporous structure can perform high-efficiency Mie scattering on incident light, and the reflectivity of the film is significantly improved (greater than or equal to 92%). Compared with a traditional solid white film, the microporous structure effectively reduces the light transmittance (less than or equal to 0.5%).