1484results about How to "Facilitate stripping" patented technology

An expandable stent is provided, wherein the stent is advantageously formed of at least one amorphous metal alloy and a biocompatible material. The stent is formed from flat metal in a helical strip which is wound to form a tubular structure. The tubular structure is not welded but rather is wrapped or coated with a biocompatible material in order to maintain the amorphous metal in its tubular configuration. Said stent can be balloon expanded or self expanding.

The invention discloses an automatic film sticking machine. The machine comprises an automatic feeding mechanism, a pre-positioning mechanism, a film sticking automatic stripping mechanism, a film sticking station conversion mechanism, an automatic film sticking mechanism and a finished product output mechanism; according to the automatic feeding mechanism, an element to be subject to film sticking is taken out and conveyed to the pre-positioning mechanism, the pre-positioning mechanism carries out position pre-adjustment on the element to be subject to film sticking, the element to be subject to film sticking and position pre-adjustment is placed on the film sticking station conversion mechanism, the automatic film sticking mechanism enables a sticking film stripped from the film sticking automatic stripping mechanism to be pasted and covered on the element to be subject to film sticking on the film sticking station conversion mechanism, and the element subject to film sticking is output through the finished product output mechanism for quality inspection. The automatic film sticking machine can be suitable for single-layer or multi-layer rapid effective film sticking, full-automatic feeding, cleaning, sticking film stripping, sticking film absorbing and film sticking are achieved, time and labor are saved, the automatic film sticking efficiency is improved, the film sticking yield is high, and the good application prospect is achieved.

The invention belongs to the field of the material science and in particular relates to a high-performance graphene/cellulose composite hydrogel and aerogel and preparation methods thereof. The preparation method of the high-performance graphene/cellulose composite hydrogel comprises the following steps: (1) adding graphite oxide to ionic liquid and ultrasonically dispersing to obtain an ionic liquid solution of the graphite oxide; preparing an ionic liquid solution of cellulose having the mass fraction of 4-6wt%; (2) adding a reducing agent to the ionic liquid solution of graphite oxide, and reducing at 80-100 DEG C for 2-24 hours, thereby obtaining an ionic liquid mixed solution of reduced graphite oxide; (3) mixing the ionic liquid mixed solution of reduced graphite oxide with the ionic liquid solution of cellulose; (4) defoaming the obtained final mixed solution, regenerating by use of a coagulating bath, and washing, thus obtaining the graphene/cellulose composite hydrogel. The composite gel prepared by the preparation method has excellent properties, particularly has excellent the mechanical properties, and can be widely applied.

The invention relates to a method for preparing graphene, characterized by carrying out explosion treatment for one or more times on carbonaceous materials by using fluids under supercritical state. By using the fluids under supercritical state to penetrate and dissolve the carbonaceous materials and having the aid of sudden release of high pressure hot steam, the shearing and peeling between layers of the carbonaceous materials are promoted to realize the preparation of graphene. Compared with using ball milling, mechanical peeling, high temperature and high pressure to prepare graphene in the prior art, the invention has the advantages of mild process conditions (low pressure), short process time, large area of prepared graphene, and complete preserved crystal structure. According to the invention, the content of graphene which comprises less than 5 layers is higher than 90 %, and the batch production of graphene powder products can be really realized.

A tamper evident lid is provided for mounting over an opening of a container having sidewalls with a lip extending outwardly therefrom to define the opening. The lid has a base, a rim extending about a perimeter of the base for receiving the lip and at least one finger extending upwardly from the rim and toward the base for engaging an underside of the lip. A frangible membrane is associated with the fingers to facilitate outward tearing of the finger regions away from the sidewalls. Each finger has a length exceeding the distance between an inside of the lip and the sidewall.

The present invention provides a method of manufacturing a microdevice having a fine capillary cavity formed as a cut portion of a very thin layer which is likely to be broken, particularly a method of manufacturing a microdevice having complicated passages formed in three dimensions with high productivity. Also, the present invention provides a multi-functional microdevice which has a fine capillary passage formed by laminating plural resin layers, fine capillary cavities piercing through the respective layers to communicate and intersect three-dimensionally with each other, a space which should serve as a reaction chamber, a diaphragm valve, and a stopper structure. The method includes the steps of forming a semi-cured coating film having a cut portion made of an active energy ray curable composition on a coating substrate, laminating the semi-cured coating film with another member and removing the substrate, irradiating the semi-cured coating film again with an active energy ray before and/or after the removal of the substrate, thereby curing the coating film and bonding with said another member. The microdevice has a multi-layered structure wherein a member (J') {selected from a member having a cut portion piercing through the member, a member having a recessed cut portion on the surface, and a member having a cut portion piercing through the member and a recessed cut portion on the surface}, a member (K') and one or more active energy ray curable resin layers (X') having a cut portion at a portion of the layer, the cut portion having a minimum width within a range from 1 to 1000 mum, are laminated and two or more cut portions in the members are connected to form a cavity.

An article packaging body is formed from a sheet of hard material so as to comprise an article containing plate part having a plurality of containing recesses for containing articles, a cover plate part connected with the article containing plate part, and a gripping piece forming plate part formed by extending from the article containing plate part and/or the cover plate part via a folding line. A plurality of gripping pieces is formed in the gripping piece forming plate part so as to be separable individually and to hold an article at the tip end of each of the gripping pieces. The gripping piece forming plate part is folded onto the article containing plate part such that the articles are placed in the respective containing recesses, and the cover plate part is openably closed so as to sandwich the gripping piece forming plate part between the cover plate part and the article containing plate part.

A telecommunication cable is equipped with at least one optical fiber coated by a tight buffer layer made from a polymeric material having an ultimate elongation equal to or lower than 100% and an ultimate tensile strength equal to or lower than 10 MPa. The above combination of features of the polymeric material forming the buffer layer provides an optical fiber which is effectively protected during installation operations and during use, and at the same time can be easily stripped by an installer without using any stripping tools, simply by applying a small pressure with his fingertips and a moderate tearing force along the fiber axis.

The present invention provides a method which includes sticking a surface protection sheet for dicing onto a surface of a wafer and cutting the sheet together with the wafer to protect the surface of the wafer from being contaminated by deposition of a dust such as swarf and the like, and picking up a chip without causing cracking or chipping in the chip after a dicing step, in the steps of dicing the wafer and then picking up the chip. The method includes: sticking the surface protection sheet for dicing onto the surface of the wafer; cutting the sheet together with the wafer; subsequently giving a stimulus to the surface protection sheet for dicing to peel the end of the chip from the dicing tape; and then picking up the chip.

The invention relates to a method of displacing oil by anionic-cationic composite surfactant and mainly solves the problems that the prior method of displacing oil by surfactant is low in oil displacement efficiency in tertiary oil recovery and an oil displacement system containing inorganic base is harmful to stratums and oil wells, corrosive to equipment and pipelines and difficult for demulsification. According to the technical scheme, crude oil is allowed to contact with oil-displacing agent, and the oil-displacing agent comprises, by weight percent, 0.01-5.0% of anionic-cationic composite surfactant, 0.01-3.0% of polymer, and 92.0-99.98% of injected water. The problems are solved well. The method is applicable to tertiary oil recovery for oil fields.

The invention belongs to the technical field of graphene preparation, and discloses a method for preparing graphene by using agricultural and forestry waste biomass as a carbon source. The method specifically includes the following steps: (1) Take the pulverized agricultural and forestry waste biomass, add it to a reaction kettle filled with water, undergo a hydrothermal reaction, cool to room temperature after the reaction, and then filter, wash, and dry to obtain a solid biochar; (2) mix the alkali with the biochar obtained in step (1), grind it sufficiently to make it evenly mixed, and heat and calcinate in the presence of protective gas; (3) use acid to prepare the sample after calcining in step (2) Soaking in liquid to remove by-products in the reaction, and then filtering, washing the obtained solid with water until the washing liquid is neutral, and then drying to obtain few-layer graphene. The method has the advantages of simple process, high yield, mild reaction conditions, simple required instruments and equipment, no pollution to the environment, using agricultural and forestry waste biomass as raw materials, greatly reducing production costs, and easy to realize industrial production.

The invention discloses a method for preparing graphene through a liquid-phase stripping method. The preparation method comprises the following steps: S1, performing expanding treatment on a graphite raw material through an expanding method; S2, dispersing the expanded graphite into an aqueous solution containing a surfactant to obtain a mixture, performing ultrasonic treatment on the mixture, centrifuging the mixture, and drying the mixture for later use; S3, adding the dried graphite into an organic solvent, a mixed solution of an organic solvent and a surfactant or a mixed solution of an organic solvent and substances with surface energy similar to that of the graphene, performing ultrasonic treatment and suction filtration, drying, and repeating the step S3 for 1-10 times, thereby obtaining graphene. Compared with the prior art, the method disclosed by the invention can be used for greatly shortening the ultrasonic treatment time, improving the stripping efficiency and obtaining high-quality graphene under low-power ultrasonic treatment.

The invention provides a preparation method of virus-free seedlings of sweet potato. The method comprises the following steps: placing sweet potato blocks that are exposed under the sun and matured banana together for 3 to 5 days; planting the sweet potatoes in sandy soil to accelerate the germination in a culture box; setting relatively high temperature; picking 1-2cm top end of the seedling based on the length; cutting off the visual leaves; disinfecting the surface; rinsing with sterile water; picking off stem tip with 1 to 2 leaf primordium; inoculating to the corresponding culture medium to respectively induce differentiation of adventitious buds and generation of somatic embryogenesis; performing virus detection to a regeneration plant; performing subculture for the virus-free seedling; hardening-seedling; directly planting into a plastic greenhouse; performing flood irrigation with more water; preventing direct exposing under sun at noon in the first two weeks after transplanting; applying urea three weeks after transplanting; watering to obtain virus-free seedlings. According to the preparation method of the virus-free seedlings of sweet potato, the virus-free test-tube plantlets are acclimated and then directly planted into the plastic greenhouse, thus the survival rate is obviously raised, and the operation processes are decreased; the process of acclimating in an acclimating room is saved, and as a result, labor, materials and property are saved.

The invention provides graphene conductive ink. The graphene conductive ink comprises components as follows: 0.5%-20.0% of a few layers of graphene, 0%-20.0% of carbon nano tubes, 0%-20.0% of conductive carbon black, 0%-20.0% of superfine conductive graphite powder, 15%-45% of resin, 0.1%-5.0% of a wetting dispersant, 30%-70% of a solvent and 0.5%-6% of auxiliaries. The paper-model conductive inkprepared with the method is difficult to disperse in the composite material, and the stability is substantially improved. By means of screening for the dispersant at the earlier stage, graphene can beeasily dispersed in a diluent in a mixing process of graphene powder and the diluent, graphene and other carbon materials are complementary in structure, a three-dimensional conductive network is formed, and therefore, conductivity of conductive ink is quite stable. Graphene conductive ink prepared with the method is excellent in product performance and stable in quality, has lower requirement for equipment and is suitable for industrial production, and the technological process is simple.