260results about How to "Prevent thermal degradation" patented technology

An optical illuminator using Vertical Cavity Surface Emitting Laser (VCSEL) is disclosed. Optical modules configured using single VCSEL and VCSEL arrays bonded to a thermal submount to conduct heat away from the VCSEL array, are suited for high power and high speed operation. High speed optical modules are configured using single VCSEL or VCSEL arrays connected to a high speed electronic module on a common thermal submount or on a common Printed Circuit Board (PCB) platform including transmission lines. The electronic module provides low inductance current drive and control functions to operate the VCSEL and VCSEL array. VCSEL apertures are designed for a desired beam shape. Additional beam shaping elements are provided for VCSELs or VCSEL arrays, for desired output beam shapes and/or emission patterns. VCSEL arrays may be operated in continuous wave (CW) or pulse operation modes in a programmable fashion using a built-in or an external controller.

A surface processing apparatus is provided for use in the surface processing of a substrate. The surface processing apparatus comprises a plasma source and processing chamber in which a substrate is mounted in use. The processing chamber is operatively connected to the plasma source and the surface processing apparatus is characterised by a transmission plate for the transmission of plasma in use between the plasma source and processing chamber. The transmission plate comprises one or more apertures wherein the physical form of the one or more apertures and/or the distribution of the one or more apertures is adapted to provide a predetermined processing pattern upon the surface of the substrate. Typically the design of the apertures is adapted to provide a substantially uniform deposition rate across a wafer substrate.

The invention discloses a PVC foaming wood plastic composite material which is produced by processing the raw materials based on the parts by weight: 100 parts of polyvinyl chloride (PVC), 40-50 parts of lignified plant fiber, 10-20 parts of active light calcium, 3-6 parts of calcium zinc complex stabilizer, 1-3 parts of compound-type foaming agent, 0.5-1.5 parts of lubricating agent OPE wax, 0.5-1 part of compound lubricating agent and 3-8 parts of foaming conditioning agent; the raw materials are evenly mixed by a mixing machine and then are directly put into a screw extruder to be extruded and molded at the temperature of 160-170 DEG C. The PVC foaming wood plastic composite material is added with full dose of heat stabilizer in the process of blending and processing, so that the degradation temperature of plastics can be increased, thermal degradation of the plastics and carbonization of wood powder in the process of mixing and forming can be prevented, and the operation of extruding and molding can be completed in one step, thus greatly simplifying the production technique and reducing the production cost.

The invention discloses a macromolecular material polymerization reaction kettle. The kettle comprises a kettle body, an upper closed cover, a drive sealing device, a stirring device, a feed and discharge port, wherein the upper part of the kettle body is an inverted cone-shaped wide mouth; the middle part of the kettle body is of a bucket shape; the lower part of the kettle body is cone; the kettle body is provided with a heating jacket 14 with a spiral flow channel and a heat insulation layer 9; the upper closed cover 6 is provided with a heating jacket 7, a heat insulation layer 9, a vacuum port 8 and a feed port 12; the stirring device consists of a stirring shaft 5, an inner strip-shaped spiral stirring paddle 3, an outer strip-shaped spiral stirring paddle 2, a scraping blade 16 and a supporting oar 18; the drive sealing device consists of a motor, a retarder and a sealing machine; and the upper part of the stirring shaft is connected with the drive sealing device. The macromolecular material polymerization reaction kettle has good stirring effect and high heat and mass transferring efficiency, can solve the difficult problems of pole climbing and devolatilization of high-viscosity fusant and is in particular suitable for the polymerization reaction of a high-viscosity macromolecular material.

This invention provides a novel polymerization catalyst other than antimony compounds, polyester produced by using the same and a process for producing polyester. The polycondensation catalyst of this invention is a polyester polymerization catalyst comprising an aluminum compound and a phosphorus compound having a specific structure. Further, this invention relates to polyester produced by using this polyester polymerization catalyst and a process for producing polyester. Further, this invention relates to fibers, films and hollow molded articles comprising the polyester.

An exhaust system (1) is provided with an exhaust passage that allows exhaust gas discharged from an internal combustion engine to pass therethrough, an exhaust emission control unit including a catalyst (2,3) such as a three-way catalyst (27) to purify the exhaust gas, and an exhaust heat collecting unit that converts thermal energy of the exhaust gas into electric energy. The exhaust passage (25) is formed in the center of the exhaust system provided with the exhaust emission control unit. By-pass passages (26) are formed at both sides of the exhaust passage (25) through which the exhaust gas flows without passing through the exhaust emission control unit. The exhaust heat collecting unit (29) is provided on the outer side of each of the by-pass passages (26).

The invention relates to a method for preparing a polyester film for a photovoltaic cell backplane, which comprises:1, a process step of synthesizing polyester chips, which is to first add terephthalic acid, glycol and antimony acetate serving as a catalyst into a reaction kettle to perform esterification, then to add triethyl phosphate and antioxidant 1010 which are blended with glycol to perform an reaction and finally to discharge the products of the reaction; 2, a process step of preparing mother particles, which is to crush the polyester chips synthesized by the step 1, dry the crushed polyester chips, add polycarbodiimide, an ultraviolet absorber MV 3638, triethyl phosphate and antioxidant 1010, mix the mixture and extrude the mixture by a double-screw extruder to produce the particles; and 3, a process step of producing a film by biaxial tension, which is to place the polyester chips synthesized by the step 1, the mother particles prepared by the step 2 and SiO2 3,000+/-100ppm PET polyester chips into the double-screw extruder for blending the mixture, melt and extrude the mixture in the double-screw extruder, casting a piece by a casting piece machine and prepare the film by biaxial tension. The method of the invention can change an active terminal carboxyl group into a stable group, so the polyester film has high aging resistance.

Provided is a glass substrate with a sealing material layer, including a sealing material layer formed by sintering a sealing material, in which: the sealing material includes at least inorganic powder; the inorganic powder includes glass powder and a refractory filler; the content of refractory filler in the inorganic powder is 10 to 35 vol %; and the sealing material layer has a surface roughness Ra of less than 0.5 μm.

A high temperature well treatment fluid comprising an electron donating compound comprising phenothiazine as thermal decomposition reduction additives for gels used in well treatment fluids is provided. The electron donating compound comprising phenothiazine performs as a stabilizer in well treatment fluids at temperatures of up to about 500° F. (260° C.). Methods of treating wells having subterranean formation temperatures of up to about 500° F. (260 ° C.) using such high temperature well treatment fluids are provided.

In a laminated external packaging material for a battery according to the present invention, a metallic foil 2 is adhered to one surface side of a base film 1, and a coated film layer 4 of thermal adhesive resin having a softening point of 160° C. or below and capable of thermally bonding to a surface film of a battery main body is formed on the other surface side of the base film 1. With this laminated external packaging material for a battery, without using an adhesive tape or a hot-melt adhesive, this packaging material can be easily and assuredly bonded to the battery main body and also can be bonded firmly to an end portion reinforcing plastic component.

A milling device is disclosed for the preparation of microscopy specimens or other surface science applications through the use of ion bombardment. The device provides the ability to utilize both gross and fine modification of the specimen surface through the use of high and low energy ion sources. Precise control of the location of the specimen within the impingement beams created by the ion sources provides the ability to tilt and rotate the specimen with respect thereto. Locational control also permits the translocation of the specimen between the various sources under programmatic control and under consistent vacuum conditions. A load lock mechanism is also provided to permit the introduction of specimens into the device without loss of vacuum and with the ability to return the specimen to ambient temperature during such load and unload operation. The specimen may be observed and imaged during all active phases of operation.

A process for making a fluid processing module is provided wherein a plurality of filtration elements is alternated with a fluid porous layer to form a stack. The filtration elements comprise a membrane sheet having a thermoplastic element bonded to a portion of an edge of the membrane. An opening is provided either through the membrane or through the thermoplastic element. A portion of the thermoplastic element extends into the opening and can be sealed to an adjacent positioned thermoplastic element to seal the porous sheet positioned between adjacently positioned membranes from fluid communication with the opening. Sealing can be effected by extending a heating element through the opening of the stack to effect simultaneous sealing of a plurality of thermoplastic elements.

The invention discloses a method of preparing concentrated clear red jujube juice with high cAMP content, which comprises the following steps: taking out red jujube after rehydration, denucleating and then crushing pulp for preparing the red jujube thick liquid; conveying the red jujube after enzymolysis by pectinase into a juicer for squeezing, and filtering to obtain the red jujube juice; adding pectinase, amylase and cellulose into the red jujube juice for heat-preservation and enzymolysis for 60-90 minutes; and clearing, conducting concentration sterilization, and finally bulking. The concentrated clear red jujube juice prepared by the invention is clear and transparent, has the cAMP content being larger than or equal to 100 mg/Kg and soluble solid state material being larger than or equal to 60.0 Brix, is deposit-free and suspension-free, has brownish red color and does not have impurities which can be seen by naked eyes; and the concentrated juice is diluted to the soluble solidstate material being 60.0 Brix, and the juice has inherent fragrance and flavor of red jujubes and is free from extraneous odor.

The present invention relates to a method for preparing polyurethaneurea elastic fiber, the method comprising reacting a mixture of at least one diisocyanate comprising 4,4'-diphenylmethanediisocyanate and 7 to 25 mole % of 2,4'-diphenylmethanediisocyanate with polyol to produce a prepolymer, and polyurethaneurea elastic fiber prepared by the same. The polyurethaneurea elastic fiber of the present invention has superior spinning workability, improved yarn evenness, and high heat-set efficiency even at low temperature.

A circulation pipe for a coolant is connected to a fuel cell. A pump and a heat exchanger are connected to the circulation pipe. A bypass pipe is connected in parallel with the pump. An ion exchanger is connected to the bypass pipe. An electronic cooling device is connected to the bypass pipe on an upstream side of the ion exchanger. The coolant, which is supplied to the ion exchanger, is cooled by the electronic cooling device to a predetermined temperature, so that the ion-exchange resins are prevented from being abnormally heated by the coolant.

A method of forming a thin barrier film of a mixed metal-silicon-oxide is disclosed. For example, a method of forming an aluminum-silicon-oxide mixture having a refractive index of 1.8 or less comprises exposing a substrate to sequences of a non-hydroxylated silicon-containing precursor, activated oxygen species, and metal-containing precursor until a mixed metal-silicon-oxide film having a thickness of 500 Ångstroms or less is formed on the substrate.

This invention is directed to a thermoplastic polyurethanes composition comprising polyether-based thermoplastic polyurethane and 1,2-cyclohexane dicarboxylic acid ester and preparation processes thereof. The thermoplastic polyurethane composition has a good mold release behavior in injection molding without undesirably significant shrinkage and surface blooming of final product.

A steel cord-rubber composite is provided, that has improved initial adhesion property and adhesion property against aging between the steel cord and the rubber composition with improved manufacturing cost efficiency. A steel cord-rubber composition composite includes a coating layer and a steel cord, and the coating layer includes an inner coating layer formed of a rubber composition containing a rubber component, a cobalt compound and sulfur and directly covering the steel cord, and an outer coating layer formed of a rubber composition of which contents of cobalt compound and sulfur are smaller than those of the inner coating layer and coating the outer portion of the inner coating layer.

The invention discloses compounds containing phosphorus, nitrogen and transition metal elements. The compounds with the structure also contain transition metal with a catalytic flame-retardant effect besides phosphorus and nitrogen elements required in the traditional flame retardant. A method for preparing the compounds with the structure is simple; and the obtained product has higher yield, does not contain halogen, is environment-friendly, has high thermal decomposition temperature, and can be used for flame-retardant engineering plastic. A general structural formula of the compounds is shown in the following formula (I).