689results about How to "Reduce processing temperature" patented technology

Novel methods and apparatuses for annealing semiconductor devices in a high pressure gas environment. According to an embodiment, the annealing vessel has a dual chamber structure, and potentially toxic, flammable, or otherwise reactive gas is confined in an inner chamber which is protected by pressures of inert gas contained in the outer chamber. The incoming gas delivery system and exhaust gas venting system are likewise protected by various methods. Embodiments of the present invention can be used, for example, for high-K gate dielectric anneal, post metallization sintering anneal, and forming gas anneal in the semiconductor manufacturing process.

The present disclosure disclosed an ultraviolet laser 3D printing method for the precise temperature control of polymer material and device thereof. The device comprises a thermostat, a laser head, a non-contact type temperature monitoring device, a scanning galvanometer, a processing platform, a powder laying device, a material to be processed, a computer control system and so on. The method comprises: presetting a processing temperature by the control system; during the processing procedure, the temperature rise condition of the processed object is monitored by the non-contact type temperature monitoring device and fed back in real time to the control system; and by recording the rise value of the temperature within a certain period, the system can obtain the absorption capability of the laser and the temperature rise degree of the processed material, so that the laser output power can be calculated according to the preset processing temperature value, and the laser power can be adjusted in real time to precisely control the processing temperature. By means of the above device and method, precise temperature control of ultraviolet laser 3D printing prototyping for polymer materials can be realized.

This disclosure concerns a process and apparatus for reclamation of waste polystyrene-type materials for reuse within the specification ranges of the input polystyrene-type material. The disclosed process and apparatus include dissolution of the waste polystyrene-type materials in a dissolve section utilizing a reusable solvent having a low boiling point and high vaporization rate, removal of solid contaminants in one or more filter sections, devolatilization of the dissolved polystyrene and recovery of the polystyrene-type material in a solid form in a recovery section. Preferably the process and apparatus provide a closed system and include recycling and reuse in the process of the vaporized solvent. The maximum temperature in the recovery section is 190° C. The reusable solvent is preferably environmentally safe and has a low boiling point and high vaporization rate. n-Propyl bromide, or environmentally safe mixtures thereof, including mixtures with isopropyl alcohol, is the preferred reusable solvent.

An antimicrobial packaging material for food stuffs containing from 0.05% to 1.5% by weight of a natural essential oil. The oil can be selected from primarily linalool and/or methylchavicol, but also from one or more of citral, geraniol, methyl cinnamate, methyl eugenol, 1,8-cineole, trans-a-bergamotene, carvacrol and thymol blended with one or more polymers selected from ethylene vinyl alcohol copolymer, polyacrylates, including ethyl acrylate methyl methacrylate copolymers, lonomers, nylons and other hydrophilic polymers or polymers possessing functional groups capable of partially anchoring the additives and the blender mix is coated onto the food contact face of a food grade packaging film or incorporated into a food grade packaging film. A binding agent such as polyethylene glycol is added to the blend to improve the retention of the volatile oil in the polymer during processing. This material has no regulatory limitations and, at the referred concentrations, does not form detectable off-flavours.

A molding material is provided including a composite having 1 to 50 wt % of (A) a bundle of continuous reinforcing fibers and 0.1 to 40 wt % of (B) a polyarylene sulfide prepolymer or (B′) a polyarylene sulfide; and 10 to 98.9 wt % of (C) a thermoplastic resin adhered to the composite; wherein the composite further has (D) a zero-valent transition metal compound or (E) a low-valent iron compound in an amount of 0.001 to 20 mol % based on the amount of sulfur atoms contained in the component (B) or (B′). A prepreg and a method of producing a fiber-reinforced molding base material is also provided. By using the molding material according to the present invention which exhibits excellent economic efficiency and productivity, a molded article having excellent mechanical characteristics can be easily produced.

The invention discloses a method for preparing a plastic/rubber thermoplastic elastomer by supercritical fluid assisted dynamic vulcanization. The method comprises the followings steps: (1) mixing plastic, rubber and a vulcanization system at a certain proportion, and putting the mixture into an extruder or an injection molding machine to mix, fuse and plasticize the polymer into a fusant; (2) controlling gas to be in a supercritical state by a supercritical fluid conveying system and injecting the gas into a cylinder of the extruder or the injection molding machine; (3) mixing the injected supercritical fluid with the polymer fusant and the vulcanization system; (4) causing a chemical reaction of the plastic, the rubber and the vulcanization system, which is promoted by the supercritical fluid; and (5) releasing the supercritical fluid from the polymer fusant at the pressure which is lower than a critical value, converting the supercritical fluid into gas to be discharged by a vacuum pump. The supercritical fluid assisted plastic/rubber dynamic vulcanization can promote dispersion and size decrease of the rubber phase in the plastic, and effectively reduce processing energy consumption for extrusion or injection shaping.

The invention discloses one dosage type low temperature scouring and bleaching agent which comprises a surface active agent, a hydrogen peroxide activator, a bleaching synergist, a chelating agent, a hydrogen peroxide stabilizer, a defoamer and a filler in a mixing mode. The one dosage type low temperature scouring and bleaching agent can be used for scouring and bleaching cotton, cotton blend knitted fabric or cotton loose fiber in a low temperature bath of 60 DEG C- 85 DEG C and cotton or cotton mixed and blended yarns in a low temperature bath of 80 DEG C -95 DEG C and for cold pad-batch processing of cotton fabric. The one dosage type agent is a solid product which is convenient to pack and transport. One agent can replace more than three agents such as alternative scouring agent, hydrogen peroxide activator, chelating agent, brightening agent and oxygen bleaching stabilizer during processing, which is convenient to feed and process. The one dosage type low temperature scouring and bleaching agent is widely applicable to processes such as scouring and bleaching in bath and cold pad-batch processing.

The invention belongs to the technical field of polymer materials and provides ketone group-containing polyethersulfone resin which is high in thermal stability, low in processing temperature and is easier for injection-molding and extrusion-molding. The ketone group-containing polyethersulfone resin is a product synthetized through nucleophilic polycondensation reaction of the following polymerization monomers: 4,4-dihydroxyl dihydroxydiphenylsulfone, 4,4'-dichlorobenzophenone and 4,4-dichlorodiphenyl sulfone. The ketone group is introduced onto the molecular chain of polyethersulfone, so as to improve the thermal stability of the polymer, reduce the processing temperature of the polymer and ensure that the polymer is more convenient for injection-molding and extrusion-molding. The invention also provides a synthetic method of the ketone group-containing polyethersulfone resin. The method is easy to operate, and the reaction process and the viscosity of materials are easily controlled.

The invention discloses a TPE flame resistant material for coating plastic and preparing method of the TPE flame resistant material. The TPE flame resistant material is composed of TPE-S, TPO, TPU, TPEE, a composite flame retardant, an antistatic agent, an antioxidant, a compatibilizer, a lubrication release agent and other auxiliaries. The prepared TPE flame resistant material coating plastic is good in fluidity, simple in processing technology, convenient to process and capable of being processed and formed by using an injection molding machine at the temperature between 180 DEG C and 210 DEG C, and production efficiency is high. The processing temperature is lower than 200 DEG C, processing can be conducted at 190 DEG C, energy consumption is lowered due to the low processing temperature, and energy resources are saved.

A process for processing or forming a material by electromagnetic radiation and in a controlled atmosphere or in a vacuum inside a reaction chamber uses a first infrared radiation causing rapid heating and a second ultraviolet radiation of the excimer type having a spectral resolution lower than 40 nm, regardless of the wavelength of the ultraviolet radiation, so as to generate a suitable photon flux either for modification of the physico-chemical properties of the material or for formation of a deposit on the substrate. The exposure time of the second ultraviolet radiation is lower than that of the first infrared radiation and the processing temperature is comprised between 70° C. and 800° C. depending on the nature of the material and of the substrate.

The invention discloses a bamboo fiber/polypropylene composite material and a preparation method thereof. The method comprises the following steps of: adding polypropylene, bamboo fibers, a compatilizer and a plasticizer into a kneading machine, an internal mixer or a double-screw extruder according to a certain ratio for mixing so as to prepare the bamboo fiber/polypropylene composite material; and preparing sheets, plates, tubes or sections of the bamboo fiber/polypropylene composite material through extrusion molding, calendaring and compression molding, and other post-procedures. The sheets, plates, tubes or sections can be used for manufacturing structural, decorative, packaging products and the like. Because the bamboo fibers come from bamboo which has the advantages of rich resources, short growth cycle and natural mold and bacteria resistance, the bamboo fiber/polypropylene composite material is a novel and renewable material.

The low melting solder glass contains, in wt. % on an oxide basis, >1-2, SiO₂; 5-10, B₂O₃; 4.5-12, ZnO; 79-88, Bi₂O₃; and 0.6-2, Al₂O₃, and a weight ratio of SiO₂ to Al₂O₃ of <2. The solder glass preferably contains from 80.5 to 85 wt. % of Bi₂O₃ and is free of lead. This solder glass has a linear thermal expansion coefficient α_(20-300) of <11.5×10⁻⁶/K and a transformation temperature Tg of <380° C. A solder glass preparation for connecting or sealing a glass part with a metal part contains the low melting solder glass and up to 20 wt. % of β-eukryptite, cordierite, mullite, willemite or zircon.

The present invention discloses one kind of polyphenyl thioether/polyamide composite material and its preparation process. The polyphenyl thioether/polyamide composite material is prepared with polyphenyl thioether 23-69.3 wt%, polyamide 10-30 wt%, glass fiber 20-40 wt%, heat stabilizer 0.2-2 wt%, silane coupler 0.1-2 wt%, processing lubricant 0.2-2 wt% and crystallization promoter 0.1-1 wt%. The polyphenyl thioether/polyamide composite material has high shock toughness, simple preparation process and low cost.

A semiconductor device includes: a semiconductor substrate formed with an active region and an isolation region and having a trench formed in the isolation region; an isolation insulating film embedded in the trench of the semiconductor substrate; and semiconductor nanocrystals buried in the isolation insulating film. The coefficient of linear expansion of the semiconductor nanocrystal is closer to that of the semiconductor substrate rather than that of the isolation insulating film, so that stress applied to the active region after a thermal treatment or the like is reduced.

The invention discloses a polyimide porous membrane including benzimidazole and benzene lateral groups. The structure of the polyimide porous membrane including the benzimidazole and the benzene lateral groups is shown as the formula (I), wherein in the formula, n:m=4:6. The molecular mass of the polymer is 50 thousand to 150 thousand. A novel polyimide porous membrane material which is good in heat-resistant performance and processable performance is designed from the molecular viewpoint and can be widely applied to the fields of battery diaphragms, capacitor diaphragms, air purification, sewage processing, low-dielectric materials, ultrafiltration membranes, protection materials, catalytic carriers and the like.

The invention belongs to the technical field of manufacturing of conductive polymer composites, and in particular relates to a preparation method of a conductive polymer composite with negative temperature coefficient (NTC) characteristics. The invention discloses a polymer based temperature-sensitive resistance material with a NTC effect, and the polymer based temperature-sensitive resistance material comprises the following raw materials in parts by weight: 88.5-96.9 parts of a polymer 1 and a polymer 2, 0.1-1.5 parts of a conductive filler and 3-10 parts of a compatilizer; moreover, the conductive filler is selectively distributed in the polymer 2; the MFI of the polymer 1 is less than or equal to 7g/10 minutes, and the MFI of the polymer 2 is more than or equal to 12g/10 minutes; the thermal expansion coefficient of the polymer 2 is greater than that of the polymer 1, and the conductive filler is a two-dimensional conductive filler; and the mass ratio of the polymer 1 to the polymer 2 is (3:7)-(7:3). The resistance material prepared by the method disclosed by the invention is low in percolation threshold, the NTC characteristic repeatability of the obtained resistance material is good, and the resistance material is convenient to use for a long time.

The semiconductor device having flip chip structure includes: an insulating substrate; a signal wiring electrode disposed on the insulating substrate; a power wiring electrode disposed on the insulating substrate or disposed so as to pass through the insulating substrate; a semiconductor chip disposed in flip chip configuration on the insulating substrate and comprising a semiconductor substrate, a source pad electrode and a gate pad electrode disposed on a surface of the semiconductor substrate, and a drain pad electrode disposed on a back side surface of the semiconductor substrate; agate connector disposed on the gate pad electrode; and a source connector disposed on the source pad electrode. The gate connector, the gate pad electrode and the signal wiring electrode are bonded, and the source connector, the source pad electrode and the power wiring electrode are bonded, by using solid phase diffusion bonding.

The invention aims to provide an asphalt modifier and a preparation method thereof, which overcome the disadvantages of nonuniform modification, serious pollution and hidden danger caused by adding rubber powder into asphalt and solve the technical problem of the modification and prefabrication of the rubber powder. The invention provides the asphalt modifier. The asphalt modifier is characterized by comprising the following components of: tire rubber powder, polyethylene, silicon dioxide and rubber oil, wherein the components are stirred, heated, extruded, cooled and cut to obtain plasticized rubber sticky particles, namely the asphalt modifier. The plasticized rubber sticky particle product of the invention greatly reduce high-temperature processing and pollution of rubber asphalt; the produced rubber asphalt sticky particles are a directly thrown type novel internal modification material and can be directly thrown into the asphalt and stones for mixing; and the asphalt modifier is odorless, can reduce secondary pollution, and has better meltability than that of rubber powder modified asphalt. The rubber asphalt particles are black sticky particles and are easy to package and transport.

The invention relates to a melt-processable modified polyvinyl fluoride (PVF) resin which is polymerized by vinyl fluoride, ethylene, one or more of CF2=CXY and one or more of CF2=CFRf. Reaction monomers are subjected to a copolymerization reaction under the action of an initiating agent in an aqueous phase or an emulsion, reaction temperature ranges from 40 DEG C to 100 DEG C, and reaction pressure ranges from 1 MPa to 10 MPa. According to the melt-processable modified polyvinyl fluoride resin, high-temperature performance of the PVF resin is kept, treatment temperature of the resin is reduced simultaneously, conventional melt processing can be used for processing the resin, and obtained thin-film materials have good combination properties.