92results about How to "Uniform physical properties" patented technology

Disclosed herein is a polyamide-imide copolymer film, comprising a copolymer resin in which a unit structure derived from TFDB (2,2′-bistrifluoromethyl-4,4′-biphenyl diamine), a unit structure derived from 6FDA (4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride), a unit structure derived from BPDA (3,3′,4,4′-biphenyltetracarboxylic dianhydride) and a unit structure derived from TPC (terephthaloyl chloride or 1,4-benzenedicarbonyl chloride) are copolymerized, wherein the copolymer resin has a weight average molecular weight of 10,000˜400,000.

The invention discloses an sintering method for rear earth tungsten electrode billets. The sintering method comprises: firstly enabling electrode compositions to accord with the weight ratio of a final product, adding one or multiple of rear earth oxides such as La2O3, Y2O3, CeO2 and ZrO2 into a tungsten billet; sending the molded rear earth tungsten electrode billet into the chamber of a medium-frequency sintering furnace, and introducing hydrogen flow into the chamber; starting the medium-frequency furnace, heating to 2000-2400 DEG C with a temperature-raising speed of 100-300 DEG C/h, and setting two or more thermal-insulation points according to material condition, and setting the thermal-insulation time of each thermal-insulation point to be 2-4 h; and switching off the power supply of the medium-frequency sintering furnace, when the temperature of the chamber is reduced to normal temperature, taking out the sintering body. By employing the sintering method, uniform-physical-property high-yield rear earth tungsten billets can be supplied in large scale with high efficiency.

The invention provides process for producing a PPE resin composition containing PPE powder using an extruder comprising: a vent pipe; a polyphenylene ether (herein after referred to as “PPE”) powder supplying pipe; an extruder supply hopper having an opening with a wall angle of 60° or more; and an extruder unit, wherein the vent pipe and the PPE powder supplying pipe each have an terminal orifice located in the opening of the extruder supply hopper, and wherein the PPE powder supplying pipe is disposed at a gear box-side portion of the extruder supply hopper, and the vent pipe is disposed at a die-side portion, relative to the PPE powder supplying pipe, of the extruder supply hopper, which process comprises the steps of: supplying the PPE powder to a gear box-side wall of the extruder supply hopper through the PPE powder supplying pipe; removing a gas accompanying the PPE powder in an effective amount through the vent pipe; and melt-kneading a mixture containing the degassed PPE powder with the extruder unit.

A force sensor chip which comprises: a base member, which includes an action portion to which an external force is applied through an attenuator, a support portion supporting the action portion, and a connection portion which connects the action portion and the support portion and deflects according to the applied external force; and a plurality of strain resistance elements which are arranged in the connection portion and detect the applied external force based on a deflection of the connection portion, wherein longitudinal directions of the plurality of the strain resistance elements are oriented in an identical direction.

Disclosed herein is a carboxylic ester dispersant shown in the following Formula 1 and a sulfide phosphor paste composition containing the dispersant. The dispersant improves the dispersibility of the sulfide phosphor paste composition and prevents oxidation by a solvent, thus improving processability and the luminescent properties of a phosphor film made from the paste and of a display produced using the film.

In Formula 1, n is 1-20.

An EPDM composition for a torsional damper. The EPDM composition is made of (a) an EPDM polymer, (b) liquid polyolefin oligomer, and (c) carbon black, the EPDM composition containing 100 parts by weight of EPDM polymer that is the EPDM polymer of (a) having a propylene content of 35 to 50 wt % in the total amount of ethylene and propylene, 5 to 30 parts by weight of liquid polyolefin oligomer that is the liquid polyolefin oligomer of (b) having a number average molecular weight Mn within a range of 3,000 to 4,000, and 10 to 120 parts by weight of carbon black that is the carbon black of (c) having a nitrogen adsorption specific surface area within a range of 100 to 150 m²/g, an iodine adsorption within a range of 110 to 160 mg/g, and a DBP oil absorption within a range of 70 to 135 cm³/100 g.

The invention relates to a liquid-state metal magnetic fluid and a preparation method thereof. In the liquid-state metal magnetic fluid, liquid-state metal alloy is used as a fluid medium, magnetic metal particles are doped, the weight ratio of the liquid-state metal alloy and magnetic metal is 100:(1-10), and the magnetic fluid is prepared by mixing of a ball-milling tank. The method is simple tooperate, is efficient and rapid and is suitable for industrial production, mass production can be achieved, and the prepared liquid-state metal magnetic fluid has the advantages of uniform physical property, high electrical conductivity, high heat conductivity and the like.

A group III nitride semiconductor light-emitting device includes a GaN crystal substrate and at least one group III nitride semiconductor layer disposed on a main surface of the GaN crystal substrate. The substrate includes a matrix crystal region and a c-axis-inverted crystal region. An off angle θ is formed between the main surface and a {0001} plane, and an off-angle component of a first direction has an absolute value |θ₁| of 0.03° or more and 1.1° or less and an off-angle component of a second direction has an absolute value |θ₂ of 0.75×|θ₁| or less, where the first direction is one of <10-10> and <1-210> directions and the second direction is the other thereof. Accordingly, the group III nitride semiconductor light-emitting device with excellent characteristics including the group III nitride semiconductor layer having good morphology and uniform physical properties and formed on the GaN crystal substrate is obtained.

The invention provides a nucleic acid isothermal amplification reaction system, and a making method and applications thereof. The nucleic acid isothermal amplification reaction system comprises a capillary main body, at least one sample amplification reaction liquid layer is filled in the capillary main body, and two ends of the sample amplification reaction liquid layer are respectively sequentially filled with a gas layer and at least one liquid layer; and the applications comprise an application of the nucleic acid isothermal amplification reaction system in nucleic acid amplification and an application of the nucleic acid isothermal amplification reaction system in the preparation of disease detection medicines. The system eliminates a problem of the leakage pollution of an aerosol in a nucleic acid isothermal amplification reaction, and substantially improves the credibility of an isothermal amplification technology; and the system has the advantages of extremely simple operation, low cost, easy integration, diversified heating mode and diversified signal exciting mode, makes the whole flow completely divorced from an external power supply, and allows a final signal to be directly observed by naked eyes.

The invention provides a method for producing an oil-resistant elastomer being cross-linked millable polyurethane obtained by polyaddition of at least one polyester diol and at least one diisocyanate, comprising the steps of:selecting the kinds and blend proportion of the at least one polyester diol and the at least one diisocyanate, respectively, so that the resulting polyurethane has an ester group concentration of at least 25 wt. % (5.7 mmol/g) and less than 35 wt. % (8 mmol/g) and a urethane group concentration of at least 7 wt. % (1.2 mmol/g) and less than 12 wt. % (2.0 mmol/g), reacting the at least one polyester diol and at least one diisocyanate to produce a millable polyurethane, and crosslinking the millable polyurethane with a curing agent to form an oil-resistant elastomer which has a rubber hardness of JIS A 95° or less and an elongation at break of at least 100%, wherein the elastomer exhibits a percent change in weight, when exposed to IRM 903 lubricating oil, of 20% or less.

A fiber reinforced thermoplastic resin molding according to the present invention is reinforced with natural fiber. The natural fiber is linen fiber to be twisted into spun yarns, and the spun yarns are pulled parallel in at least one direction and are molded integrally with a thermoplastic resin. The linen fiber is flax yarn (linen) fiber, for example, and preferably is molded into a fiber reinforced thermoplastic resin molding while having an equilibrium moisture regain. The fiber reinforced thermoplastic resin molding preferably is formed by a film-stacking method in which a thermoplastic resin film is melted and compressed. Consequently, there is provided a plant fiber reinforced thermoplastic resin molding that poses no environmental problem, has a high strength, and has a uniform physical property.

Numerous particles of thermoplastic resin supporting a metal on surfaces thereof are joined together by pressure welding. The metal is supported in a three-dimensional matrix on the group of joined particles.

An interconnect structure is described, disposed on a substrate with a conductive part thereon and including a first porous low-k layer on the substrate, a damascene structure in the first porous low-k layer electrically connecting with the conductive part, a second porous low-k layer over the first porous low-k layer and the damascene structure, and a UV cutting layer at least between the first and the second porous low-k layers, wherein the UV cutting layer is a UV reflection layer or a UV reflection-absorption layer.

A sulfide phosphor paste composition comprising a sulfur-containing dispersant, and a fluorescent film prepared therefrom, are provided. The sulfur-containing dispersant has a dual head structure containing both a carboxyl group and a thiol group or a structure containing a thiol or thiophene group as a head group. An oligomeric sulfur-containing dispersant is also provided. Adsorption of the dispersant on the surface of the sulfide phosphor prevents aggregation of the phosphor particles, and thereby improves the dispersibility of the sulfide phosphor paste composition, the homogeneity of the phosphor in the paste composition, and the density of a film produced from the paste composition. Fluorescent films and display devices produced from the phosphor paste composition exhibit improved luminescent properties and excellent processability.

An exotherm reducing additive including a tetrahalogenated ionic compound and an exotherm reducing additive composition for organic polymer compositions including an exotherm reducing-effective amount of the tetrahalogenated ionic compound, a solvent for the tetrahalogenated ionic compound, and a diluent compatible with the tetrahalogenated ionic compound, the solvent and the organic polymer composition, The tetrahalogenated ionic compound preferably is a tetrahalogenated borate, and more specifically lithium or sodium tetrafluoroborate. Organic polymer compositions containing the additive also are provided, as are methods incorporating the additive into the polymer compositions.