155results about How to "Block through" patented technology

There is provided a fuse detection circuit comprising a first inverter circuit comprising a PMOS transistor (P2) and an NMOS transistor (N2) having gates connected in common and connected to the first node (A); a second inverter circuit comprising a PMOS transistor (P1) and an NMOS transistor (N1) having gates connected in common and connected to the second node (B); and a third NMOS transistor (N3) having a drain and source connected between the third node (C) and the ground potential, and a gate connected with the control signal, wherein the control signal is set to a predetermined level in an initial state to precharge the node (A),(B) and thereafter a molten state of a fuse is detected in accordance with a potential level of the second node (B) at a change in the level of the control signal.

The invention discloses a blue light resistant tawny polarized sunglasses lens, which is formed by combining an optical filter and a polarizing film, wherein the optical filter is made by mixing PC, 7308 color powder, 8416 color powder, 8415 color powder and 8410 color powder according to a principle that each 100 kilograms of PC is added with 2.21 grams of 7308 color powder, 7.70 grams of 8416 color powder, 10.57 grams of 8415 color powder and 0.86 grams of 8410 color powder. Besides having a tawny color, the lens can effectively prevent light rays with a wave length ranging from 380 to 500 nanometers from penetrating and therefore can reduce the damages of the blue light to eyes and prevent eye diseases such cataract and diseases in retinal macular area. In addition, the combined polarizing film can effectively prevent glare and make the vision field clear. The lens is particularly suitable for people who receive a cataract surgery, have a history of macular degenerative disease, are being taken care of after laser surgery, have pseudomyopia, have frequent outdoor activities, live in areas with high sunlight, use computer for a long term or the like.

The invention discloses a hard resin lens and organic glass lens surface ultra-hard coat coating method, which comprises the following steps that: an amorphous tetrahedral carbon film is formed on the surface of the lens through pretreatment, glow discharge cleaning, electric arc discharge and carbon ion precipitation, the film has good light transmission and good corrosion resistance, the abrasion resistance of the coated lens is remarkably improved compared with that of the non-coated lens, the coherence force between the amorphous tetrahedral carbon film and the resin and organic glass substrate is strong, the film is difficult to drop of, and the ultraviolet light test indicates that the ultraviolet transmission rate can be effectively reduced by the coat; and the hardness of the coated lens which is prepared with the method can reach more than 85 GPa, the SP3 key structure content in the coat is more than or equal to 85 percent, the friction coefficient is small, the abrasion resistant time is long, and the abrasion resistance is greatly improved.

The invention relates to a Nafion / sulfonated SiO2 molecular sieve composite proton exchange membrane and a preparation method thereof. the proton exchange membrane takes Nafion alcoholic solution and a sulfonated SiO2 molecular sieve as main raw materials. The preparation method comprises the following steps: distilling the raw materials for removing low-boiling alcohol by a solvent replacement method under reduced pressure to obtain Nafion-DMF solution; proportionally mixing the sulfonated SiO2 molecular sieve with the Nafion-DMF solution and evenly dispersing the obtained mixed solution; keeping standing and defoaming to obtain milky casting solution; and membrane-casting in a clear and flat glass culture ware to obtain the Nafion / sulfonated SiO2 molecular sieve composite membrane after thermal treatment. The thickness of the composite membrane is 45-55mum, wherein, the content of the sulfonated SiO2 molecular sieve is 1-15%, preferably 1-10%; and the composite membrane has the characteristics of low methanol transmittance and high proton conductivity.

The invention provides a method for production of Nafion / mesoporous silicon dioxide composite proton exchange film. By using the method of dip-coating in situ, silica sol comprising a surfactant is coated on the surface of Nafion film by pulling to obtain the Nafion / mesoporous silicon dioxide composite proton exchange film. Alcohol-resisting performance of a hybridized film and the proton conducting performance are controlled by varying type and concentration of the surfactant, speed rate and times of the dip-coating pulling, and the interval time among several dip-coating pulling. The surface of the obtain composite film includes a nanometer network structure of the mesoporous silicon dioxide, which can efficiently block methanol from penetration, meanwhile, on account of hydrophilic property of the mesoporous silicon dioxide, the proton conducting rate of the composite film still remains as equivalent as that of the Nafion film or even higher than that of the Nafion film. The above characteristics endow the composite film with a quite extensive prospect in applying to direct methanol fuel battery.

The invention discloses a fireproof safety door. A water spray mechanism is arranged in a door frame, the water spray mechanism comprises water pipes arranged in the orientation of the door frame, thewater pipes communicate with the outside water source through a three-way joint, and a temperature-sensitive device is arranged between the three-way joint and the outside water source; a plurality of latticed empty cavities are formed in a door body, the empty cavities are filled with flame retardants and water bags, wherein the flame retardants and the water bags are separated from each other,the flame retardants comprise spongy layers and rock wool layers arranged on the two sides of the rock wool layers, and the water bags are connected with the inner walls of cavities bodies of the empty cavities of the door body through supporting plates. The water spray mechanism, the flame retardants and the water bags are arranged, when fire happens, on the one hand, water sprayed from the waterspray mechanism forms a water curtain to block flames, and the water curtain further has certain absorption action on smoke dust in air; and on the other hand, the flame retardants can greatly improve the heat-insulating performance of the door body, when the water bags shrink and crack after heated, internal loaded tap water overflows from a through hole of the door body, and the temperature rise speed of the fireproof safety door is effectively reduced.

The invention discloses a substrate for a flexible luminous device. The substrate comprises a flexible substrate and a conductive layer, and the flexible substrate and the conductive layer are formed in one of the following two modes: (1) the flexible substrate is adhesive to be doubly cured, the conductive layer is a thin layer carbon nano tube, and inorganic luminous nano particles are filled into gaps of the thin layer carbon nano tube; and (2) the flexible substrate is inorganic luminous nano particle-doped adhesive to be doubly cured, the conductive layer is a thin layer carbon nano tube, and the inorganic luminous nano particle-doped adhesive to be doubly cured is filled into gaps of the thin layer carbon nano tube, wherein the adhesive to be doubly cured comprises an ultraviolet curing and thermal curing system, an ultraviolet curing and microwave curing system, an ultraviolet curing and anaerobic curing system and an ultraviolet curing and electron beam curing system.

The invention discloses a high-barrier-property pesticide packing bottle and preparation thereof. The high-barrier-property pesticide packing bottle comprises a barrier layer, an adhesion layer and abase layer which adhere to one another successively from inside to outside, the barrier layer and the base layer are separately attached to the two sides of the adhesion layer, and the thickness ratioof the barrier layer, the adhesion layer and the base layer is 1: 0.5-0.8: 2-2.5. The preparation method comprises the following steps: S1, raw material fusing; S2, double-screw extrusion forming; S3, blow molding; and S4, blow molding of the barrier layer. The high-barrier-property pesticide packing bottle has excellent mechanical property and pesticide permeation resistance, and has the advantage of good barrier property. In addition, a pesticide packing bottle prepared by the preparation method is formed integrally, the mechanical property and the pesticide permeation resistance are excellent, and the barrier property is good.

The invention discloses a modified sulfoaluminate cement waterproof material and a preparation technique thereof. The modified sulfoaluminate cement waterproof material comprises, by weight, 100 partsof sulfoaluminate cement, 20-30 parts of silicone-acrylic emulsion, 15-25 parts of fluorine-bearing polyacrylate emulsion, 0.6-1.4 parts of isopropyl tris(dioctyl pyrophosphate)titanate, 50-70 partsof quartz powder, 1-3 parts of a water reducer, 0.8-2 parts of an ultraviolet absorbent, 30-40 parts of lithium silicate, 20-30 parts of nitrilotriacetic acid, and 15-25 parts of barium chloride. Thepreparation technique comprises: adding isopropyl tris(dioctyl pyrophosphate)titanate into sulfoaluminate cement, stirring for 1 h, heating resultant with silicone-acrylic emulsion and fluorine-bearing polyacrylate emulsion to 60-80 DEG C, holding the temperature, stirring for 3-5 h to obtain modified sulfoaluminate cement, and mixing well the modified sulfoaluminate cement with the rest materialsto obtain the above waterproof material. JS Waterproof coating and cement-based permeable crystal waterproof material are integrated and complement each other, the produced novel waterproof materialis highly adaptive to temperature, humidity and other external force majeure, and has high toughness and ductility.

After an inner wall tube, made of steel or alloy containing not less than 2% of Cr, whose outer surface thereof is machined and / or ground to a thickness of 0.1 mm or more including the scale layer, is inserted into an outer wall tube, made of ferritic steel containing not less than 2% of Cr, in which an oxide scale layer containing Cr and having a thickness of 10 to 30 μm is formed in the inner surface thereof , cold working at an outside diameter reduction rate of 5 to 30% is performed. Similarly cold worked after an inner wall tube having an oxide scale layer on the outer surface thereof, is inserted into an outer wall tube whose inner surface is machined and ground. A double-walled tube made has a uniform gap and an excellent thermal conductivity, and is suitable as materials for SG tubes of future FBR.

A water molecule permeable membrane and a preparing method and application thereof are disclosed. The method includes adding a film forming substance of a polymer film and an antibacterial material into a solvent, fully mixing the mixture, filtering the mixture with a filter screen to obtain a coating solution, coating a hydrophobic porous base membrane with the coating solution through an aniloxroll, and drying the product to form a hydrophilic polymer film on the hydrophobic porous base membrane to obtain the water molecule permeable membrane. The water molecule permeable membrane includesthe hydrophobic porous base membrane and the hydrophilic polymer film covering the base membrane. The water molecule permeable membrane has a high water molecule penetration rate, can be used for water-mist-free sterile water molecule humidifiers, and allows tap water to rapidly pass through the permeable membrane in a form of water molecules and diffuse to the environment by applying a fan. The water molecule permeable membrane is healthy and energy-saving.

The invention provides a fin type field effect transistor formation method comprising the steps that a substrate is provided, and multiple discrete fin parts are formed on the surface of the substrate; a shielding layer covering the surface of the fin parts is formed by adopting the deposition technology, and reactant gases of the deposition technology include a main source gas and an oxygen source gas, wherein the main source gas is gas including fin part material atoms; a photoresist film is formed on the surface of the shielding layer; exposure processing and development processing are performed on the photoresist film so that a patterned photoresist layer is formed; the patterned photoresist layer acts as a mask film, and the doping technology is performed on part of the fin parts; the patterned photoresist layer is removed; and the shielding layer is removed. In the technology process of formation of the shielding layer, consumption of the fin part material is low and even no fin part material is consumed so that the characteristic dimension of the fin parts is maintained to be unchanged. Besides, damage to the fin part material in the process of development processing can be prevented by the shielding layer so that the formed fin type field effect transistor is enabled to possess excellent electrical performance.

The present invention provides a warp-knitted fabric and a medical material that can be simultaneously extended in all directions by causing thread made of a second bioabsorbable material to be absorbed in a living body over time and in which the degree of extension can be increased. The present invention provides a warp-knitted fabric 10 in which adjacent loop rows are linked, the warp-knitted fabric 10 including: a plurality of first loop rows including a first thread and composed of continuous loops extending in the warp direction; and one or two or more second loop rows disposed between the first loop rows and composed of continuous loops extending in the warp direction, wherein each second loop row is formed of one or two or more loops solely including a second thread and one or two or more loops including the first thread, which are arranged alternately, at least three first loop rows are linked together by the first thread, and the bioabsorption rate of the first thread is lowerthan the bioabsorption rate of the second thread.

The invention provides a display panel. The display panel is provided with a first polarized layer, a second polarized layer and a half-wave plate arranged between the first polarized layer and the second polarized layer, the half-wave plate can deflect the polarization direction of visible light of which the wave length is larger than a specific wave length by 90 degrees, the deflection angle of the polarization direction of the visible light of which the wave length is smaller than the specific wave length is smaller than 90 degrees, and the specific wave length is the blue or purple visible light wave length. For example, the half-wave plate can effectively change the polarization direction of the light with the wave band ranging from 430 nm to 780 nm and inefficiently change the polarization direction of the light with a low wave band ranging from 380 nm to 430 nm, the second polarized layer can effectively block permeation of the light with the low wave band ranging from 380 nm to 430 nm, and a harmful blue light wave band is successfully blocked. The display panel has the advantages of being low in blue light, healthy and capable of protecting eyes.

The invention relates to electron-irradiation resisting shielding material and a method for preparing the same. The electron-irradiation resisting shielding material comprises 15-35 percent by volume of Mo or W and 65-85 percent by volume of AlN, wherein the Mo or W is used as the high Z metallic phase, and the AlN is used as the Z dielectric phase. The insulating high-energy electron-irradiation resisting shielding material has higher shielding efficiency than the high atomic number metal such as tantalum, tungsten and lead, has high thermal conductivity, can reduce the dosage of the electron-irradiation deposition agent by over two orders of magnitude without destroying the original radiating condition of the components and can ensure that the temperature of the chip meet the normal work requirement when the components are working.

The invention discloses a flexible substrate used in a luminescent device. The substrate comprises a flexible substrate and a conducting layer. The flexible substrate and the conducting layer are formed in one of the following two ways: (1) the flexible substrate is organosilicon adhesive which is solidified by ultraviolet light and the conducting layer is thin layer carbon nanotube, wherein the gap of the thin layer carbon nanotube is filled with inorganic luminescence nanometer particle; (2) the flexible substrate is organosilicon adhesive which is solidified by ultraviolet light and doped with inorganic luminescence nanometer particle, and the conducting layer is thin layer carbon nanotube, wherein the gap of the thin layer carbon nanotube is filled with organosilicon adhesive which is solidified by ultraviolet light and doped with inorganic luminescence nanometer particle. According to the substrate provided in the invention, the problems of the poor surface flatness of the thin layer carbon nanotube and the poor bonding force between the carbon nanotube and the flexible substrate are solved, and the conductivity of the conducting layer and the obstructing capability to water and oxygen of the substrate are improved.

The invention relates to a first-aid bleeding stopping dressing and a preparing method thereof. The bleeding stopping dressing comprises of a first layer, a second layer, a third layer and a fourth layer, wherein spunlace non-woven fabric containing chitosan fibers serves as the first layer, a non-woven fabric water absorbing pad with low water absorption capacity serves as the second layer, a non-woven fabric water absorbing pad with high water absorption capacity serves as the third layer, and a breathable and moisture nonpermeable isolation layer serves as the fourth layer. The second layer and the third layer are wrapped in the first layer and the fourth layer with the method of hot pressing on the peripheral edges of the first layer and the fourth layer. The first-aid bleeding stopping dressing has the quick bleeding stopping effect; meanwhile, the first-aid bleeding stopping dressing has the advantages that blood and wound percolate can be sealed in the dressing and prevented from staining the periphery skin and clothes, and good breathability is achieved.

The invention relates to the field of improvement technologies and ecological remediation of saline-alkaline land, in particular to a method for ecological re-greening of coastal saline-alkaline sandby using salt-tolerant plants. A saline-alkaline isolation layer consists of broken brick residues or miscellaneous fill and coarse sea sand, loose large-porous structures formed by the miscellaneousfill and the broken brick residues in constructional engineering can effectively block salt in lower layers from returning to the surface layer of soil along with water under the capillarity action, infiltration discharge of salt on the upper layer can be dredged, construction waste can be used, and the construction cost can be saved; a salt reverse osmosis layer can effectively block root systemsof the plants from penetrating the isolation layer, prevent the root systems from being affected by salt damage and prevent reverse osmosis of salt of the isolation layer; the arrangement principle of a saline-alkaline sand improvement layer lies in that physical and chemical properties of the saline-alkaline sand are improved, and effects of soil looseness and breathability, water retention, sufficient fertility and proper pH can be realized by cooperation with mushroom soil. The technical scheme has active and significant effects on ecological re-greening of the coastal saline-alkaline sandand is suitable for promotion on a large scale.

The invention provides a method for arranging a silicon dioxide coating on the surface of a solar photovoltaic back plate and the solar photovoltaic back plate prepared through the method. The method comprises the following steps: coating one or two surfaces of the solar photovoltaic back plate with a layer of polysilazane solution; then baking the solar photovoltaic back plate for 2-3 hours in an oven of which the relative humidity is 85 percent and the temperature is 85 DEG C; then baking the solar photovoltaic back plate for 1-2 hours at the temperature of 120-150 DEG C, so that the polysilazane solution is converted into the silicon dioxide coating, and the solar photovoltaic back plate with the silicon dioxide coating is obtained. By arranging the silicon dioxide coating on an outer-layer fluorine film, water vapor can be more effectively prevented from penetrating through the outer-layer fluorine film, so that an inner-layer PET (Polyethylene Terephthalate) film and a solar photovoltaic cell are protected from being slightly attacked by the water vapor, the aging time of the PET film is effectively prolonged, the solar photovoltaic cell is better protected, and the efficiency and the long-time use reliability of the solar photovoltaic cell are facilitated.

The invention provides a multifunctional concrete formwork underlay, and is characterized in that the underlay is formed by a drainage exhaust layer and a filter layer, wherein the surface of the drainage exhaust layer is provided with grids or grazing, and the filter layer is an earthwork fabric layer with certain porosity and permeability. The drainage exhaust layer is a drainage body with a three-dimensional porous structure; the dimension of pores of the drainage body is determined by the pouring requirement of concrete; the thickness of the drainage body is between 1.5 and 2.0mm; each grid can be of a quadrangular shape or a hexagonal shape with a side length of between 0.3 and 0.5mm; and the filter layer can be the earthwork fabric layer. The earthwork fabric layer adopts a spunbonded continuous yarn earthwork fabric; the pore diameter and the permeability of the earthwork fabric layer are determined by the pouring requirement of the concrete; the pore diameter of the earthwork fabric layer is generally of between 0.15 and 0.20mm; and the permeability coefficient of the earthwork fabric layer is generally Kx10<-3>cm / s. The multifunctional concrete formwork underlay can automatically drain water, exhaust steam and perform maintenance, thereby improving the strength and compactness of the surface layer of the concrete; moreover, construction is convenient, formwork removal time is shortened, the turnover rate of the formwork is increased, and the cost is reduced.

The invention discloses a door-bottom protection soundproof bar. The door-bottom protection soundproof bar includes a fixing frame, a movable bracket, a sound isolation sealing strip and a driving mechanism. The driving mechanism includes a sliding rod, a connection plate, a compression spring and a thimble; the connection plate is bent, a sliding way is arranged in the fixing frame, the compression spring and a sliding rod are arranged in the sliding way, the connection plate is connected with the sliding rod and the movable bracket respectively to form a four-connection-rod mechanism, when adoor is closed and in a completely closed state, the thimble at one end of the sliding rod is squeezed by the side of a door frame so that the sliding rod can transversely move in the sliding way, meanwhile the compression spring is in a compression state, the connection plate drives the movable bracket to move downward, the sound isolation sealing strip arranged in the movable bracket stretchesout downward, a gap at the bottom of a door is closed, when the door is opened, the sound isolation sealing strip is away from the ground when the movable bracket is automatically retracted, opening and closing of the door is not affected, no damage is caused to the ground, outside dust, peculiar smell, insects, cold and hot air flow and the like can be effectively prevented from entering the doorthrough the gap of the bottom of the door, and the indoor environment is protected.

The invention relates to a purification method of phosphoric acid, which belongs to the technical field of phosphorous chemical industry. The technical problem to be solved by the invention is to improve the purity of the phosphoric acid, effectively remove impurities of anions and cations and obtain high-purity acid for preparing industrial-grade or food-grade phosphoric acid. The technical scheme of the invention is as follows: the purification method of the phosphoric acid adopts the three-chamber electrodialysis method and comprises the following steps: adding phosphoric acid solution to be purified in an anode chamber, adding acid solution in a cathode chamber, and adding ultrapure water or diluted phosphoric acid in an intermediate chamber; and carrying out electrodialysis under the action of a direct current electric field, leading phosphate radicals in the anode chamber to pass through an anion exchange membrane and enter into the intermediate chamber, leading hydrogen ions in the cathode chamber to pass through a cation exchange membrane and enter into the intermediate chamber, and finally obtaining the purified phosphoric acid in the intermediate chamber. The method can separate the phosphoric acid from impurities through the action of the attraction force of the electric field, the concentration difference diffusion and the selective permeability of the anions and the cations and obtain the purified phosphoric acid in the intermediate chamber, the process is simple, and the obtained product has good quality, thereby providing the new process for purifying the phosphoric acid.

The invention discloses a substrate for a flexible luminescent device. The substrate comprises a flexible substrate and a conducting layer, wherein the flexible substrate and the conducting layer are formed by one of the following two ways: (1) the flexible substrate is an adhesive needing dual-curing; the conducting layer is a thin layer carbon nanotube; and the gap of the thin layer carbon nanotube is filled with organic luminescent materials; and (2) the flexible substrate is an organic luminescent material doped adhesive needing dual-curing; the conducting layer is a thin layer carbon nanotube; the gap of the thin layer carbon nanotube is filled with the organic luminescent material doped adhesive needing dual-curing; and the adhesive needing dual-curing comprises an ultraviolet curing-thermocuring system, an ultraviolet curing-microwave curing system, an ultraviolet curing-anaerobic curing system and an ultraviolet curing-electron beam curing system.

The invention provides a processing method for etching and cutting sapphire through a laser-induced KOH chemical reaction, and belongs to the field of special processing. The processing method mainlycomprises the following four steps that (1) the surface of the sapphire is uniformly covered with a layer of KOH powder; (2) laser system parameters and process parameters of sapphire laser etching are determined; (3) after the laser scanning path and the scanning speed are determined, etching of the sapphire is conducted by a laser beam according to the scanning path; and (4) if the sapphire is cut, the laser beam is split in the groove etching direction; and if the sapphire is etched, the step is omitted. According to the processing method, two etching methods of fusion KOH corrosion of thesapphire and laser ablation of the sapphire are combined, so that etching with the high etching rate of the sapphire is conducted; based on the processing method, a sapphire thin plate is cut by meansof the crack controlling method; a complex two-dimensional etched groove can be etched on the surface of the sapphire; and due to the fact that the etching mechanism of the processing method is thatsapphire corrosion is mainly achieved through the chemical reaction, the high etching rate under the condition of low crack damage can be achieved, and high-quality linear cutting of the sapphire thinplate can also be realized.

The invention relates to low-emissivity glass which belongs to the field of energy-saving technology and has a single silver coating structure. The low-emissivity glass only uses one dielectric layer. In the basic structure, the low-emissivity glass orderly comprises a glass substrate 10, a silver coating 11 and a dielectric layer 12, wherein the dielectric layer comprises 1-10 sublayers, and the sublayers comprise a silicon film, a silicon alloy film, a silicon-oxygen film, a silicon-nitrogen film, a silicon-oxygen-nitrogen film, a silicon alloy-oxygen film, a silicon alloy-nitrogen film, a silicon alloy-oxygen-nitrogen film, a transition metal-nitrogen film and the like. The low-emissivity glass of the invention has the advantages of stable performance, high reliability and high production efficiency, can greatly reduce the cost, and is beneficial to large-scale popularization and application.

The invention discloses a convenient and practical microphone ejection preventing cover which comprises a sleeve, loudspeaker cloth, an upper check ring and a lower check ring. A large number of small holes which are uniformly distributed are arranged in the wall thickness part of the sleeve. The loudspeaker cloth sleeves the sleeve. A waterproof and dustproof breathable film is arranged between the sleeve and the loudspeaker cloth. An elastic rubber ring is arranged on the outer diameter end of the bottom of the loudspeaker cloth. An extending part on the bottom end of the sleeve is inserted into a first annular groove on the upper end of the upper check ring. An upper magnet ring is arranged in a second annular groove on the lower end of the upper check ring. A third annular groove is arranged at a part, which is corresponding to the second annular groove, on the upper end of the lower check ring. A lower magnet ring is arranged in the third annular groove, wherein the lower magnet ring and the upper magnet ring are in magnetic attraction. A seal ring is arranged in a lower circular through hole of the lower check ring. According to the invention, confusion caused by sound ejection can be significantly reduced, and the convenient and practical microphone ejection preventing cover has the advantages of simple structure, easy carrying, and excellent dustproof and waterproof effects.

The invention relates to a test target and a test method for testing targeting precision of a laser device and belongs to the technology field of laser inertia confinement fusion. The test target includes a target surface, and the target surface includes gold foil layers and a hydrocarbon film layer. A total of two gold foil layers are arranged, the hydrocarbon film layer is located between the two gold foil layers, and laser beams emitted by the laser device are simultaneously incident on surfaces of the gold foil layers in a symmetrical manner. Each gold foil layer is provided with a plurality of first grooves and a plurality of second grooves, the first groove and the second groove are arranged in an intersected manner to form a plurality of intersecting points as target holes, groove depth of each of the first grooves and the second grooves is as much as thickness of the gold foil layer. In the test target, a planar target structure in which one gold foil layer, the hydrocarbon film layer and the other gold foil layer are stacked layer by layer. Each laser beam can hit front and back surfaces of the test target at the same time, shooting accuracy of many laser beams can be tested in one test, time need for shooting accuracy testing can be reduced, and shooting accuracy test efficiency can be improved.

The invention relates to a high-barrier anti-ultraviolet environment-friendly PET composite flexible packaging material and belongs to the technical field of packaging materials. The high-barrier anti-ultraviolet environment-friendly PET composite flexible packaging material comprises a base material layer and an ink layer, wherein the ink layer coats the surface of the base material layer; the base material layer is prepared from the following components in percentage by mass: polypropylene, polyethylene glycol terephthalate, 4.85%-7% styrene-ethylene-propylene-styrene segmented copolymer, polylactic acid, a composite ultraviolet light absorber, an antioxidant and zinc stearate; the ink layer is prepared from the following components in percentage by mass: alcohol-soluble polyurethane resin, alcohol-soluble acrylic resin, omega-fluorocarbon alcohol, ethanol, a pigment and a flatting agent. The composite flexible packaging material has excellent water vapor and oxygen barrier properties, and the adhesive force of the ink layer and the base material is relatively good.

The invention discloses a high-opacity white or light flame-retardant polypropylene composition and a preparation method thereof. The high-opacity white or light flame-retardant polypropylene composition comprises, by weight, 35-75 parts of polypropylene resin, 3-5 parts of environment-friendly phosphorus, nitrogen and bromide composite flame retardant, 15-40 parts of opacifying agent A, 0.01-0.1part of opacifying agent B, 0.2-1 part of antioxygen, 0.3-1 part of lubricant and 0.1-1 part of white or light toner. By the aid of the efficient environment-friendly phosphorus, nitrogen and bromidecomposite flame retardant, the composition meets requirements for vertical combustion V2 grade of a UL94 flammability standard, by matching of the opacifying agent A and the opacifying agent B, extremely low transmission of light of the composition is realized, and the composition can be prepared into high white or various light colors. By utilizing the environment-friendly flame retardant, low toxicity and low smoke effects can be realized during combustion, mechanical property of the composition can be kept well, and the composition is applicable to preparation of various white or light products requiring flame retardant and lightproof effects.

The invention discloses a pad printing method, a key and pad printing equipment. The pad printing method comprises the steps that semi-transparent printing ink is pad-printed on a first surface of a transparent base body to form a first layer; first shielding printing ink including a first pattern is pad-printed on the first layer to form a second layer; second shielding printing ink including a first pattern and second patterns is pad-printed on the second layer to form a third layer; and the first pattern of the third layer coincide with the first pattern of the second layer, wherein the first patterns and the second patterns are hollowed-out patterns. According to the method, operation is easy, and a part subjected to pad printing can display different patterns under the conditions of natural light irradiation and backlight irradiation. The patterns of the key are manufactured according to the method. The key can display different patterns under different light irradiation conditions. The pad printing equipment is applied to the pad printing method. The pad printing equipment has the characteristics of being high in pad printing speed and rate of good products.