14results about How to "Be transparent" patented technology

The invention discloses a damp-heat-resistant polylactic acid transparent film and a preparation method thereof, and relates to the technical field of polymer packaging materials. According to the preparation method of the damp-heat-resistant polylactic acid transparent film, the nucleating agent, the anti-hydrolysis agent, the compatilizer and the polylactic acid resin are subjected to blending granulation and then subjected to tape casting processing, and a film blank is obtained; stretching the thin film blank at a preset temperature, then shaping the thin film blank, heating the thin film blank to 150 DEG C or above in a shaping state, keeping the temperature for 10-15 minutes, then cooling the thin film blank to a preset stretching temperature, and repeating the stretching-heating shaping-cooling process for 2-6 times to obtain the damp-heat-resistant polylactic acid transparent film product. The nucleating agent, the anti-hydrolysis agent, the compatilizer and the polylactic acid resin are compounded and matched with a multi-time stretching process, so that a large number of microcrystals are formed in the polylactic acid, the heat-resistant temperature of the polylactic acid film is increased, and the toughness and transparency of the polylactic acid film are kept.

The invention discloses an invisible appliance based on a transparent piezoelectric film and a design method thereof. A perioral muscle pressure sensor is installed on the lip / cheek lingual surface of teeth of the invisible orthodontic appliance, an occlusal force sensor is installed on the occlusal surface, and a tooth surface counter-acting force sensor is installed on the inner side tissue surface, so that dynamic changes of perioral muscle pressure, occlusal force and orthodontic force can be monitored in real time. The invisible orthodontic appliance provided by the invention integrates a sensor with high piezoelectric coefficient and high flexibility, has high sensitivity and accuracy, can be used for testing dynamic changes of orthodontic mechanics and evaluating the influence of perioral muscle pressure, occlusal force and the like on treatment during physiological processes of chewing, breathing, swallowing, language and the like of a patient; a doctor optimizes an orthodontic scheme through the PC terminal and pays attention to the association between oral functional mechanics and malocclusion, bad oral habits, bruxism, temporomandibular joint disorder and other diseases, and the efficiency and accuracy of oral health management are improved.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a PC / ABS composite material with high heat resistance and flame retardance as well as a preparation method and application of the PC / ABS composite material. The PC / ABS composite material is prepared from the following components in percentage by mass: 80 to 95 parts of polycarbonate resin, 5 to 20 parts of acrylonitrile-butadiene-styrene copolymer resin, 4 to 16 parts of a phosphorus flame retardant, 0.1 to 0.5 part of a sulfonate flame retardant, 2 to 8 parts of a compatilizer and 0.1 to 1 part of an antioxidant. According to the invention, sulfonate is compounded to synergistically generate BDP flame-retardant PC / ABS, so that the heat resistance of the material is remarkably improved, and the material shows excellent performance in the PC / ABS material. The heat stability and the mechanical performance of the material are remarkably improved through the optimized component proportion, and the material is suitable for application occasions with high flame retardance, low smoke and low toxicity, especially for products exposed outdoors for a long time such as new energy automobile charging piles.

The invention discloses a database access method and device for preventing user data leakage in a container, and the method comprises the steps: a business service sends a connection establishment request to a database service; a database side vehicle service hijack connection establishment request which has the same POD with the business service and is different from the business service in a container contai ner; the database side vehicle service analyzes a database protocol, modifies a user name and a password in the connection establishment request, and forwards the modified connection establishment request to the database service; the database service performs user name and password verification based on the modified connection establishment request, and returns a response after the verification is passed; and the database side vehicle service receives the response of the database service and forwards the response back to the business service, and the business service establishes database connection with the database service. According to the invention, the database side vehicle service is introduced between the business service and the database service, all database connection requests are intercepted, and the business service does not need to know the user name and password of the database when connecting the database, so that the leakage of certificates is avoided.

The utility model belongs to the technical field of glass conductive display, and provides conductive glass and a display device.The conductive glass comprises a glass substrate, an ITO layer and a hydrophobic layer, the ITO layer is arranged on the glass substrate, the hydrophobic layer is arranged on the side, back to the glass substrate, of the ITO layer, and the hydrophobic layer at least has the waterproof characteristic and the organic solvent resisting characteristic. The utility model aims to solve the technical problem that the surface of conductive glass is easy to mildew in the prior art.

A dynamic statistics and result analysis system for watershed river and lake shoreline development and utilization comprises a remote sensing data acquisition module, a data preprocessing and classification module, a database construction module, a change trend analysis module, a river and lake directory and association retrieval module and an interaction management module. The data preprocessing and classification module is used for data preprocessing and statistical classification, the database construction unit is used for constructing a system database, the variation trend analysis module is used for variation trend analysis and statistical report generation, and the river and lake directory and association retrieval module is used for directory maintenance and result association. According to the dynamic statistics and result analysis system for watershed river and lake shoreline development and utilization, a remote sensing data statistical classification algorithm based on a neural network is proposed to classify remote sensing data; and a river-lake shoreline development and utilization change trend analysis algorithm based on deep learning is proposed to analyze the change trend.

The raw material compositions for preparing acrylic optical coatings and for preparing acrylic optical lenses both contain sulfur-containing aromatic acrylate compounds as shown in Formula A. The optical materials prepared from these raw material compositions, with precisely controlled refractive indices of 1.53–1.60, significantly improve the material's resistance to yellowing, optical durability, and impact resistance, meeting the application requirements of high-end optical materials. Wherein, R1 = CH2 = CH-COO, R2 = CH3, n = 2 or 3, and m = 0, 1, or 2.

The invention relates to the technical field of high polymer material processing, and discloses a supercritical CO2 assisted devolatilization and microcellular foaming integrated method for preparing optical-grade PMMA (polymethyl methacrylate), which comprises the following steps: conveying a PMMA prepolymer containing a residual methyl methacrylate monomer into a high-pressure reaction kettle to be in contact with supercritical CO2 and saturated; then, the saturated melt is subjected to rapid pressure reduction, CO2 dissolved in the melt is separated out to form a micropore structure, and residual monomers are synchronously brought out; and cooling and shaping to obtain the optical-grade PMMA material. By adopting the method disclosed by the invention, integrated preparation of efficient removal of PMMA residual monomers and micropore lightweight forming can be realized at a lower processing temperature, and the obtained material has lower residual monomer content, lower density, higher light transmittance and lower haze.

The utility model discloses a disposable biological safety cabinet operation auxiliary isolation film, including support frame, bearing roller, isolation film and force storage unwinding mechanism, support frame is provided with two, and bearing roller rotation is connected between two adjacent support frames. In the utility model, through setting isolation film as three layer structure, make isolation film not only have "transparent, prevent alcohol, degradable" characteristics, still through the electrostatic adsorption ability of bottom layer electrostatic layer fixed, need not sticky glue, not only avoided sticky glue failure problem, also will not leave residual in biological safety cabinet inner surface, through the pertinence design, solved the dental oral cavity isolation film "size is not suitable, easy to break, fixed unstable, clean complicated problem in biological safety cabinet scene, more meet the laboratory high safety, high efficiency operation demand, in addition, the volute spring in force storage unwinding mechanism drives the bearing roller fast rotation through the force storage, realizes the quick unwinding of isolation film.

The utility model discloses a transparent gradient color and ice crystal data line, which comprises two connecting ends 1, each connecting end 1 is provided with an outer mold, each outer mold is respectively provided with a PP material I 2, a PP material II 3, a plastic shell 4 and a transparent PVC I 5 from inside to outside, the PP material I 2 is connected with the connecting ends 1, the outer surface of the plastic shell 4 is coated with gradient color paint, the connecting ends 1 are connected through a line body 6, and the line body 6 is connected with the plastic shell 4. The transmission line designed by the utility model has the effects of attractive appearance and strong performance.

The utility model belongs to the technical field of gas-water separation, and particularly relates to a simple self-control liquid level gas-water separator, which comprises a tank body, a gas outlet arranged on the upper end face of the tank body, a water replenishing port arranged in the middle of the front side and a vacuum pump water supply port arranged on the lower portion of the front side. An overflow port is formed in the middle of the back surface of the tank body; the air outlet, the air inlet and the overflow port are respectively provided with a standard upper connector and a standard lower connector which are sealed in a butt-clamping mode, and the water supplementing port is provided with a floater type automatic water supplementing switch which is arranged in the tank body. The automatic water replenishing tank is simple in structure, light in weight, convenient to install and low in manufacturing and production cost, and the float type automatic water replenishing switch and the overflow port are installed in the tank, so that the liquid level in the tank is automatically controlled; the tank body is made of a plastic material and has certain transparency, so that the internal liquid level condition is easy to check, and the tank body is particularly suitable for liquid ring pump units with simple working conditions, such as vacuum priming devices.

The utility model relates to plant tissue culture technical field, and disclose a kind of plant tissue culture bottle of adjustable ventilation, including upper bottle body and lower bottle body, the lower bottle body rotation is connected in the bottom of upper bottle body, the outer wall of upper bottle body is fixedly connected with annular baffle, the outer wall of annular baffle and lower bottle body is all set with corresponding air hole, the inner wall of upper bottle body is provided with cleaning assembly, the cleaning assembly includes L board, the L board fixedly connected on the inner wall of upper bottle body, the sidewall of L board is set with through hole, and guiding rod is slidably connected in through hole. The plant tissue culture bottle of adjustable ventilation, by the rotation of annular baffle and drive scraper to rotate, utilize the elastic support force of spring to scraper, ensure that scraper is always closely combined with lower bottle body inner wall, complete bottle wall cleaning, continuously keep bottle wall transparent, convenient for operator real-time observation of the growth state of tissue culture seedling.

The application discloses a data processing method and device based on a blockchain network, equipment and a storage medium. The method comprises the following steps: obtaining read set data corresponding to business data according to a receipt generation request; the read set data comprises state data required by an instruction corresponding to the executed business data in a chain process; generating snapshot data according to the read set data and block metadata corresponding to the business data; re-executing the instruction corresponding to the business data based on the snapshot data to obtain contract receipt information; the contract receipt information comprises data generated by re-executing the instruction corresponding to the business data, and the contract receipt information is used for generating verification information for the business data, and the verification information is used for indicating the main chain network to verify the correctness of the business data in the secondary chain network.

The application relates to the technical field of high polymer material processing, and discloses a method for integrally preparing optical PMMA through supercritical CO2 assisted devolatilization and microporous foaming, which comprises the following steps: conveying PMMA prepolymer containing residual methyl methacrylate monomers into a high-pressure reaction kettle to be contacted with and saturated by supercritical CO2; then rapidly reducing the pressure of the saturated melt to make CO2 dissolved in the melt precipitate to form a microporous structure and simultaneously take out the residual monomers; and finally cooling and shaping to obtain optical PMMA material. By adopting the method, the integrally preparation of high-efficiency removal of PMMA residual monomers and microporous lightweight forming can be realized at a lower processing temperature, and the obtained material has lower residual monomer content, lower density, higher light transmittance and lower haze.