54results about How to "Reduced thermal performance" patented technology

The invention discloses a polyester composition and an application thereof, comprising blends formed by poly(ethylene terephthalate) and poly(ethylene naphthalate) or copolymer formed by ethylene terephthalate units and ethylene naphthalate units; and nucleating agent which accounts for 5ppm-10wt% of the total weight of the polyester combination; in the blends formed by the poly(ethylene terephthalate) and the poly (ethylene naphthalate), the poly(ethylene terephthalate) accounts for 80-99.9mol%, and the poly(ethylene naphthalate) accounts for 0.1-20mol%; in the copolymer formed by the ethylene terephthalate units and the ethylene naphthalate units, the ethylene terephthalate units account for 80-99.9mol%, and the ethylene naphthalate units account for 0.1-20mol%. The composition has good crystallization property, good color tone and low haze. The polyester composition can be used for preparing hot-pressed polymer films.

The invention provides a method for preparing a montmorillonite/graphene oxide aerogel/epoxy resin composite material and relates to a study on single-aspect performance of a double-phase composite material or epoxy resin. The method for preparing the montmorillonite/graphene oxide aerogel/epoxy resin composite material comprises the following steps: after adding expanded graphite to a container under a condition of ice-water bath, adding a mixed solution of concentrated sulfuric acid and concentrated nitric acid to the container; adding potassium permanganate to the container; stirring and heating an obtained mixture; after adding hydrogen peroxide to the mixture till a solution becomes luminous yellow, adjusting the PH value of the solution to 7; centrifuging the solution; freezing and drying the solution to obtain graphene oxide aerogel; taking the graphene oxide aerogel and adding the graphene oxide aerogel to acetone solution; carrying out ultrasonic treatment on an obtained mixture to obtain modified graphene oxide under the nitrogen protection; adding acetone to the modified graphene oxide and modified montmorillonite mixture; adding pre-heated epoxy resin to the modified graphene oxide and modified montmorillonite mixture in advance; and ultrasonically stirring, vacuumizing, heating, curing and cooling an obtained mixture to obtain a three-phase composite material. Themethod for preparing the montmorillonite/graphene oxide aerogel/epoxy resin composite material is used for preparing the montmorillonite/graphene oxide aerogel/epoxy resin composite material.

The invention discloses a heatproof hybrid epoxy resin containing phosphosilicate as well as the preparation method and the application thereof. The preparation method of epoxy resin is that: counting in mass fraction, 100 epoxide polyalkyl silicane, 50 to 120 organic solvent are mixed with 0.001 percent to 0.5 percent catalyst agent of epoxide polyalkyl silicane mass, then under 50 to 120 DEG C, 10 to 40 deionized water is dropwised in mixing solution by hydrolyzing and reflowing for 2 to 8 hours before 1 to 100 active material containing phosphor is added in, and the organic solvent used for reaction is removed after 3 to 10 hours reaction under 100 to 160 DEG C, thus acquiring the heatproof hybrid epoxy resin containing phosphosilicate, the number-average molar mass is 500-6000. After being separately solidified or compound solidified with normal epoxy resin, the heatproof hybrid epoxy resin containing phosphosilicate has the advantages of good mechanical property, flame retardant property and heat-resistant quality, tensile strength up to 43 to 94 Mpa, limiting oxygen index up to 23 to 38 and glass transition temperature up to 165 to 187 DEG C, can be used widely as electronic industrial base material with high-performance.

A heat collector of solar energy is composed of a number of gravity heat pipes, a numbers of glass vacuum pipes and a collector. The gravity heat pipes and glass vacuum pipes are level-placed. The energy received from sunlight can not be influenced when water heater is installed on level surface or on vertical surface.

The invention discloses a multifunctional nursing bed for nursing of the nephrology department. The nursing bed comprises a sickbed frame, a fixing cover, a sliding rail, a telescopic blocking cover,an adjusting frame, a clamping plate, a circulation cover, a connecting pipe, a heat supplying pipe, a thermally-insulated cover, a fan, a partition plate, a heater, a heat conducting bar, a filter element, a shell body, a weight displayer, a pothook, a placing groove, a weight sensor, a spring and a supporting plate. The multifunctional nursing bed for nursing of the nephrology department is ingenious in structure and powerful in functions, through the placement design of a combined urine guiding bag, a urine guiding device worn by a patient of the nephrology department can be conveniently stored and detected safely, medical workers can conveniently and quickly know the urine collecting amount, through the cooperative effect of a built-in heating mechanism, moisture of the lower part of the patient body can be effectively reduced, comfort of the patient is improved, the waist part of the patient can be kept warm, the blood circulation is accelerated, the purpose of promoting tissue metabolism is achieved, and finally, the multifunctional nursing bed is beneficial for clinical application and popularization.

The invention discloses an engine connecting rod mechanism with a variable compression ratio. An existing engine connecting rod mechanism is characterized in that once the engine connecting rod mechanism is designed, the compression ratio of an engine cannot be changed through a connecting rod and the performance of the engine cannot be fully exerted due to a fixed compression ratio. According to the engine connecting rod mechanism with the variable compression ratio, the working length of the connecting rod is stretched out and drawn back through connecting rod structures of inner and outer combination bodies; the engine connecting rod mechanism is characterized in that the compression ratio of the engine can be changed and the performance of the engine can be fully exerted.

The invention discloses a polyester composition and use thereof. The polyester composition comprises a copolymer consisting of an ethylene terephthalate unit and an ethylene naphthalate unit; the ethylene terephthalate unit content of the copolymer consisting of the ethylene terephthalate unit and the ethylene naphthalate unit is 80 to 99.9 mol percent, while ethylene naphthalate unit content is 0.1 to 20 mol percent; and the polyester composition at least contains a compound A which may be an antimony compound or a titanium compound, a compound B which may be a phosphorous compound, and a nucleating agent which is 5ppm to 10 weight percent of the total weight of the polyester composition. The composition has high crystallinity, high tone and low haze, and can be used for preparing a hot-pressed thin polymer film.

The invention discloses a waterproof down coat which comprises a coat body, a hat, a collar and sleeves, wherein waterproof covering bags are arranged at joints of the sleeves and the coat body; waterproof fabrics are arranged in the covering bags; after being unfolded, the waterproof fabrics can cover the whole sleeves; a waterproof covering ring is arranged at the edge of the hat; a waterproof fabric is arranged in the waterproof covering ring; and after being unfolded, the waterproof fabric can cover the whole coat body. The waterproof down coat disclosed by the invention has the advantages that the down coat structure design is reasonable; a plurality of waterproof structures are arranged on the down coat body; the waterproof fabrics which can be quickly unfolded are arranged in the waterproof structures, thereby endowing the down coat with a waterproof function, preventing the down coat from being eroded by rainwater and further avoiding reduction in a warm-keeping effect; and the waterproof structures are conveniently used and stored, have various appearances, are high in wearing comfort and can bring convenience to the travelling of people in rainy and snowy days.

The invention provides a preparation method of a steel surface DLC (diamond-like carbon) coating structure based on ionic nitriding and multi-layer compounding, and belongs to the field of steel surface coating materials. The coating comprises a steel matrix surface ion nitriding layer, a Cr transition layer, a gradient change Cr/WC transition layer, a W-doped DLC layer and a hydrogen-containing DLC layer. Through the design of the DLC coating, gradient increase of the hardness of the coating is realized, and the internal stress of the coating is effectively released, so that the binding force of a film substrate is improved, and the thermal stability of the coating is improved. The coating can effectively improve the wear resistance and corrosion resistance of the steel for the special structure, better meet the protection requirement of the steel for the special structure, and greatly prolong the service life of the steel for the special structure.

The invention discloses a down fabric, which sequentially comprises a fabric outer layer, a down layer and an inner lining layer from top to bottom, wherein the fabric outer layer and the down layer as well as the down layer and the inner lining layer are respectively and independently adhered by adhesion layers, the fabric outer layer is prepared from the following raw materials by weight: 50-70parts of polypyrazolo[1,5-A]-1,3,5-triazine-2,4(1H,3H)-dione 3-(tert-butyldimethylsiloxy)glutarate, 20-30 parts of poly bis(carboxyethylgermanium sesquioxide) polytetrahydrofuran glycol ester, and 10-15 parts of graphene oxide. According to the present invention, the down fabric has advantages of excellent gas permeability, excellent down penetration prevention effect, excellent water resistance,excellent cold resistance, excellent weather resistance, excellent flame retardancy and good hand feeling, and further has health-care function of blood circulation promoting.

The invention relates to a modified poly(p-phenylenebenzobisoxazole) (PBO) fiber and a preparation method thereof. According to the fiber, the main problem of poor pressure resistance of the PBO fiber is solved. The preparation method comprises the steps of reacting by virtue of 2-hydroxyl dimethyl terephthalate, an amine source and paraformaldehyde as raw materials so as to prepare terephthalic acid containing an oxazine side group, reacting by virtue of o-amino-phenol hydrochloride, terephthalic acid and terephthalic acid containing the oxazine side group as raw materials so as to prepare modified PBO containing the oxazine side group, carrying out dry-jet wet spinning method to an obtain original benzoxazine grafted modified PBO fiber, and carrying out thermal treatment and benzoxazine open loop crosslinking on the original benzoxazine grafted modified PBO fiber, so as to obtain the modified PBO fiber. The preparation method has the advantages that by introducing an oxazine structure to the side groups of PBO molecular chains, the tensile property of the fiber is hardly influenced; and oxazine is subjected to open loop crosslinking during the thermal treatment of the fiber, and the PBO molecular chains are chemically crosslinked, so that the pressure resistance of the fiber can be substantially improved.

The invention relates to a manufacturing method of a silk rabbit wool and polyester blended fabric. The manufacturing method comprises the following steps: taking 58-62% by weight of long wool, 25-29%by weight of polyester, 8-12% by weight of non-degummed raw mulberry silk and 2-4% by weight of rabbit wool as raw materials; combing and spinning the long wool into wool strips, preparing the rabbitwool, mulberry silk and the polyester into mixed strips through a cotton spinning process, dissolving sericin protein on the surface of the mulberry silk in the mixed strips and permeating the sericin protein into the mixed strips through a degumming process, and irreversibly denaturing the sericin protein permeated into the mixed strips through a denaturing process of the degummed mixed strips to adhere the rabbit wool; and then blending and mixing the mixed strips and the wool strips, and sequentially carrying out roving, spinning, winding, doubling, double twisting, weaving, dyeing and finishing to obtain the silk rabbit wool and polyester blended fabric. The obtained fabric has the advantages of low cost, high heat retention performance, soft and smooth hand feeling, rich velvet feeling, difficulty in pilling and difficulty in unhairing.