31results about How to "Not easy to separate and fall off" patented technology

The invention discloses a gel-poly(lactide-co-glycolide) (PLGA) two-phase gradient transition cartilage-bone repair material and preparation thereof. The material is cylindrical and consists of an upper material and a lower material, wherein the upper material is glycidyl methacrylate-modified carboxymethyl chitosan and gelatin; the lower material is porous PLGA. The preparation process comprises the following steps: preparing a gelatin microsphere serving as a pore-forming agent into a PLGA porous scaffold of which one end face is a conical concave surface; preparing a gel solution by using the modified chitosan and modified gelatin; dripping the gel solution on the PLGA porous scaffold of the conical concave surface, inverting, performing ultraviolet light cross-linking to obtain the gel-PLGA two-phase gradient transition cartilage-bone repair material. The material has high biocompatibility and biodegradability, is in a two-phase gradient transition structure, is tightly combined without drop and is simple in preparation process.

The invention belongs to the technical field of composite hoses, and particularly relates to a fiber reinforced heat insulation composite hose and a manufacturing method thereof. The fiber reinforcedheat insulation composite hose comprises a reinforcing layer, wherein the reinforcing layer comprises an inner lining layer and a strip blank compounded on the outer surface of the inner lining layerin a hot melting manner, the outer surface of the strip blank is sequentially provided with a hot melt adhesive film layer and a heat insulation layer, and the heat insulation layer is made from a microcapsule foam material. One-step forming co-extrusion process is used for manufacturing. The fiber reinforced heat insulation composite hose has the beneficial effects that high strength and good heat and cold insulation effects are achieved while the light weight and softness of material are maintained, an all-in-one forming method is adopted, and simplicity, convenience and efficiency are achieved.

The invention provides a preparation method of a bamboo fiber molding composite. The method comprises the steps that after bamboo chips are ground into a loose state, the bamboo chips are soaked intoa nano calcium carbonate solution, a chelating agent is added, flash-explosion treatment is carried out, and modified bamboo fiber crude products are obtained; the residual solution is filtered to obtain bamboo basic structure crude products; the bamboo fiber crude products are soaked into a nano calcium carbonate solution to be ultrasonically treated, and modified bamboo fibers are obtained; theresidual solution is filtered to obtain bamboo basic structure crude products; the bamboo basic structure crude products obtained in the two times are combined, washing and airing are carried out, andbamboo basic structures are obtained; and the bamboo basic structures are soaked into water, a thickening agent is added, stirring and filtering are carried out, modified bamboo basic structures areobtained, the dried modified bamboo fibers and the modified bamboo basic structures are mixed and subjected to mold pressing, and the bamboo fiber molding composite is obtained. The bamboo fiber molding composite is good in uniformity and high in fiber yield, the bamboo basic structures can be effectively utilized, and efficient utilization of bamboo is achieved.

The invention discloses a sagger containing a calcium hexaluminate composite layer and a preparation method of the sagger. The sagger containing the calcium hexaluminate composite layer is a composite layer sagger and comprises a base layer and the calcium hexaluminate composite layer, and when the sagger is prepared, a simple tool for applying composite layer powder is adopted, the powder is uniformly applied to the inner surface of the sagger, the calcium hexaluminate composite layer powder and the matrix layer powder are molded into a blank in one step in a mold pressing mode, and then the blank is fired and molded in a high-temperature kiln. The sagger has the beneficial effects that calcium hexaluminate, magnesium aluminate spinel, aluminum oxide and mullite in the calcium hexaluminate composite layer provided by the invention are matched, so that the composite layer has the advantages of high temperature resistance and corrosion resistance, meanwhile, the calcium hexaluminate composite layer is equivalent to the matrix layer in thermal performance and is well matched with the matrix layer, the composite layer is not easy to separate and fall off, and the service life of the sagger is prolonged. The method has the advantages of low production cost, simple process, energy conservation and environmental protection.

The invention discloses plastic plate molding equipment. The equipment comprises a first plastic extruding machine, a second plastic extruding machine, a third plastic extruding machine, first guide rollers, an upper-layer nonwoven fabric layer unwinding equipment first unwinding device, a lower-layer nonwoven fabric layer unwinding equipment second unwinding device, second guide rollers and traction devices which are arranged sequentially, wherein the first plastic extruding machine is used for extruding a middle-layer heat-insulation plate; the second plastic extruding machine is used for extruding an upper plastic sheet layer; the third plastic extruding machine is used for extruding a lower plastic sheet layer; a setting mold is fixedly connected onto a first setting device; a heat-insulation plate machine head is mounted on the first plastic extruding machine, an extruded heat-insulation plate blank is cooled and set by the setting mold of the first setting device, and a continuous heat-insulation plate is formed; the middle-layer heat-insulation plate, the modified plastic sheet layer on the upper side, the modified plastic sheet layer on the lower side and grid fabric or nonwoven fabric are bonded together in a hot-melt manner respectively; the heat-insulation plate is made of polystyrene (PS), polyvinyl chloride (PVC), polyurethane (PU), polypropylene (PP), polyethylene (PE) and ethylene-vinyl acetate (EVA); and the plastic sheet layers are made of PVC, PP, PE and PU. The grid fabric or the nonwoven fabric or a polymer adhesive layer has the good bonding property to a wall and does not fall off easily, and the service life is long.

The invention provides a polypeptide single-layer film with a primary amino exposure amount of 6%, and a preparation method and an application for the polypeptide single-layer film. The polypeptide iscomposed of polypeptide molecules with a molecular weight of (1.48 +/- 0.2) * 10<5> g/mol; the thickness of the single-layer film is 14.6 +/- 0.1 nm; the exposure amount of primary amino groups on the surface of the film is 6 +/- 0.3%; the Zeta potential of the polypeptide single-layer film is minus 4.48 +/- 0.1 mV; and the contact angle of the film is 45 +/- 1 degrees. The polypeptide single-layer film provided by the invention has good stability; the exposure amount of primary amino groups on the surface of the film is accurately controlled to be 6.0 +/- 0.3%; and the polypeptide single-layer film can be applied to an oral implant surface coating material, and can carry antibiotics and antibacterial drugs and stably release the antibiotics and the antibacterial drugs; and the local drug-loaded coating of the polypeptide single-layer film has the advantages of small toxic and side effects on the whole body, strong antibacterial property and the like, is uniformly and tightly combinedwith a pure titanium material, and is not prone to separating and falling off.

The invention relates to a siesta chair which is characterized by comprising front feet (1), rear feet (2), a panel frame (3), middle supporting feet (4) and a panel soft pad (5). The panel frame (3) comprises a seat frame (31), a back frame (32) and a rear back frame from front to rear, wherein the rear back frame comprises a rear back frame outer border and a rear back frame inner border (33), and the rear back frame outer border comprises a rear back frame front section (34) and a rear back frame rear section (35). The panel soft pad (5) is arranged on the outer surface of the panel frame (3). The siesta chair has the advantages of being high in structural strength, attractive in appearance, and easy to use. In addition, by means of the siesta chair, sleeping postures can be conveniently adjusted.

The invention provides a cigarette firmware material meeting safety requirements and an application thereof, and relates to the technical field of cigarette firmware materials. An existing filtering rod purely depends on the improved draw resistance and the improved filtering efficiency to achieve the effects of reducing tar and lessening harm, or for keeping the smoke fragrance, the adsorption efficiency of the filtering rod is reduced; the cigarette firmware material meets food-safety raw material preparing, and has unique cross-grain spiral guiding groove; after the cigarette firmware material is combined with a common filtering rod, damage of the existing high-draw-resistance and high-filtering filtering rod to smoke fragrance can be eliminated, the effects of reducing tar and lessening harm of the filtering rod are not reduced, and the cigarette safety requirements are met.

The invention relates to a V clamp brake which is used for being assembled on a bicycle, wherein the bicycle comprises two fork rods and a wheel set assembled between the two fork rods. The V clamp brake comprises two brake swing arms and two brake block components, wherein the two brake swing arms are respectively assembled on the two fork rods in a mode of pivoting to the wheel set, and each brake swing arm is provided with a connection part; and the two brake block components are respectively assembled on the two brake swing arms, and each brake block component is concavely provided with an assembling slot which is positioned at the connection part in a sliding mode. The invention also provides a brake system which comprises the V clamp brake and a wire component, wherein the wire component is used for connecting the two brake swing arms, and the wire component can be operated to drive the two brake swing arms and the two brake block components to swing towards the wheel set.

The invention relates to an airborne smoke bar spreading device. The airborne smoke bar spreading device comprises a plurality of smoke bars and a spreading shell body; the multiple smoke bars are installed on the spreading shell body, and the multiple smoke bars are parallel to each other and are arranged and distributed into a linear row in a spaced mode; due to the fact that the multiple smokebars fixed to the spreading shell body are parallel to each other and arranged and distributed into the linear row in a spaced mode, so that the structure can effectively reduce wind drag, and the structure can be applied to a high-speed airplane; in addition, structurally, the airborne smoke bar spreading device can be divided into a plurality of similar areas, the areas enable the gravity of theairborne smoke bar spreading device be in a dispersed distributed state, namely, the gravity of the airborne smoke bar spreading device of the structure is not concentrated on a certain point or in several limited areas, so that the local stress of an installing position on the airplane is greatly reduced, and damage is reduced; and furthermore, smoke bars of various specifications and differentfunctions can be adopted, and the general applicability of the airborne smoke bar spreading device can be further enhanced.

The invention discloses a double-layer functional form food packaging bag and belongs to the field of food packaging. The double-layer functional form food packaging bag comprises a packaging bag bodyof which the upper end is fixedly connected with a packaging bag head through a sealing strip; the packaging bag body comprises an outer packaging bag layer and an inner packaging bag layer; the sealing strip comprises a sealing concave strip and a sealing convex strip; a closed auxiliary drying mechanism is arranged in the position of the sealing concave strip; the lower end of the closed auxiliary drying mechanism is connected with a double-layer drying structure; a plurality of cavities are arranged inside the sealing concave strip; an auxiliary drying combined ball is placed inside the cavity; another closed auxiliary drying mechanism is arranged at the sealing part of the packaging bag body, a double layer drying structure is also arranged in the position of the closed auxiliary drying mechanism, the closing state of the closed auxiliary drying mechanism can be kept under a state that the bag body is opened, so as to keep the stable drying performance of the auxiliary drying combined ball inside the cavity. Therefore, during the food packaging bag re-sealing process, a complete drying effect is played, and the drying effect lasts for long.