109results about How to "Wide viscosity range" patented technology

A dispensing cartridge for a relatively precise dispensing of various fluids having a relatively wide range of viscosities is disclosed. The dispensing cartridge in accordance with the present invention is relatively simpler in configuration than known dispensing cartridges while minimizing leakage of the fluid and eliminating problems associated with chemical attack of the O-ring by the fluid in the dispensing cylinder. In particular, the dispensing cartridge in accordance with the present invention includes a cylinder; a piston with a central bore and a bleed plug. In order to simplify the design, the air vent is configured as a tortuous path, for example, a spiral path, defined by a spiral bleed plug, which in a pre-staged position, allows air to freely escape along the spiral path along the circumference of the plug. As the piston contacts the fluid, the forward motion of piston is resisted by the high back pressure created by the small effective diameter and relatively long length of the spiral path. Once the piston contacts the fluid, the spiral plug is pushed into the piston closing the spiral path. By controlling the fluid flow by way of a tortuous path, the amount of fluid backflow through the piston is minimized if not eliminated, thus eliminating the need for an annular overflow chamber, thereby simplifying the design of the piston. In order to minimize problems related to the sealing of the piston within the dispensing cartridge, the piston may be provided with one or more radially extending sealing lips. These sealing lips are used in lieu of or in conjunction with an O-ring. The sealing lips further simplify the design by eliminating the O-ring as well as the need for an annular chamber adjacent thereto as well as problems relating to chemical attack of the O-ring by the fluid within the dispensing cylinder. In an alternative embodiment for use that is particularly adapted with non-aggressive fluids, the piston is provided with a single sealing lip and an O-ring.

A tire-sealing apparatus for injecting a sealing composition into a vehicle tire either as a prophylactic or for sealing an existing leak is in the form of a pressurizeable container for a flowable sealant compound. An inlet is provided for introducing compressed gas into the container to pressurize its contents. An outlet line is also provided to deliver the sealant into a tire, the pressurized gas acting on contents of the container and providing the motive force for the delivery. A dip tube extends into the compound and is coupled to a one-way valve to provide a controlled flow of the compound from the container into the tire while preventing back pressure of the tire from either delivering air or compound back into the container. A passageway between the outlet tube and an interior of the container is provided to allow a flow of compressed gas within the container into the outlet tube along with the sealant.

Solution-processable organic n-type semiconductor materials are provided with processes for preparing the same. Composites and electronic devices including the organic n-type semiconductor materials also are provided.

The invention relates to the technical field of welding materials, in particular to a halogen-free soldering flux for lead-free solder paste. The halogen-free soldering flux for the lead-free solder paste comprises the following components in percentage by mass: 20 to 35 percent of solvent, 30 to 45 percent of rosin, 5 to 10 percent of surfactant, 10 to 20 percent of organic acid, 3 to 10 percent of antioxidant and 2 to 8 percent of thixotropic agent. According to the halogen-free soldering flux, a rosin mixture consisting of hydrogenated rosin and polymerized rosin at a weight ratio of 1:(1-3) is adopted, so that higher adhesive force of the solder paste is ensured; the proportion of the solvent and the rosin in the soldering flux is regulated, so that the viscosity range of the solder paste is wider; by the compounding of multiple organic acids, the prepared soldering flux is free of halogen, and has higher activity; the antioxidant for preparing the soldering flux is one or a combination of more than two of methylbenzotriazole, an antioxidant BHT, CHIMASSORB3030, benzimidazole and methylimidazole; the solder paste prepared from the soldering flux is long in service life, and has good de-molding effects.

The invention provides an ultra-micro glue dispensing device and a method. The device comprises a glass micro tube, a glue solution and a solution moving needle which is arranged in the glass micro tube and can move to pass through the glue solution, wherein the glass micro tube is internally provided with the glue solution. The method comprises the step of realizing the ultra-micro glue dispensing by the micro liquid drop which is absorbed at the front end of the solution moving needle when the solution moving needle is penetrated through the glass micro tube. The invention is simple and easy to run, and can be used for not only the contact type ultra-micro glue dispensing but also the non-contact type ultra-micro glue dispensing, thereby being wide in an applicable viscosity range; the size of a glue spot can be easily changed by adjusting the diameter size of the front end of the solution moving needle, so that the control of glue dispensing quantity can be controlled; the micro adjustment of the size of the glue spot can be realized by controlling the micro distance between the front end of the solution moving needle and a glue dispensing surface; and the glue dispensing can not be limited within the vertical direction, and the micro glue dispensing can be realized at the any directions of the space by changing the turning angle of a turning pair.

The invention discloses a reaction apparatus with external circulation equipment and a method for the reaction apparatus to control reaction process. The reaction apparatus comprises a reaction kettle as well as a fluid conveyer and a heat exchanger. One end of the fluid conveyer is connected to the lower part of the reaction kettle by a pipeline, while the other end is connected with the intake of heat exchanger by the pipeline, and the outlet of the heat exchanger is connected with the upper part of the reaction kettle by the pipeline, thereby constructing an external circulation passage for reactants. Stir and heat exchange are carried out to the reactants by the external circulation passage. The control carried out to the liquid-phase reaction by adopting the reaction apparatus with external circulation equipment and the method for the reaction apparatus to control reaction process is characterized by high heat exchange rate in the reaction process and suitability to a reactant system with a wide viscosity range, meanwhile, the construction cost and operational cost are both relatively low.

The invention relates to a bacterial cellulose/chitosan composite gel and preparation thereof, and application of the composite gel in body surface wound surface healing. The composite gel is composed of a chitosan solution, bacterial cellulose, an antimicrobial agent, a thickener solution and a neutralization agent. The invention also relates to application of the bacterial cellulose/chitosan composite gel in preparing body surface wound surface healing medicines. The preparation method comprises the following steps: uniformly mixing the chitosan solution, thickener solution, bacterial cellulose and antimicrobial agent, adding the neutralization agent to regulate the pH value to 6.0-9.0, and standing for deforming. The composite gel provided by the invention has favorable film-forming action, and performs the functions of isolating the wound surface and protecting the wound; and the bacterial cellulose/chitosan has the advantages of simple preparation process and easy technical control, and is convenient for industrial production.

The disclosure generally provides branched diester compounds having exceptional low-temperature and flow properties. The disclosure also provides uses of the branched diester compounds in lubricant compositions, for example, as a base oil, and in other applications where their low-temperature and flow properties can be employed beneficially. The disclosure also provides efficient and green methods for making the branched diester compounds.

In certain embodiments, a vegetable oil-based diester (1,6-hexyldioleate) was branched with propanoic acid (C3) using a green synthetic approach involving solvent-free and catalyst-free epoxide ring opening followed by in situ normal esterification. A total of three branched ester derivatives possessing varied numbers of internal protruding branched ester groups and hydroxyl groups were obtained. All of the pure branched derivatives were comprised of mixtures of positional isomers and/or stereoisomers. Differential scanning calorimetry (DSC) showed that regardless of the composition inhomogeneity of each branched derivative, crystallization was suppressed completely in all of the branched compounds, and they all demonstrated glass transitions below −65° C.

Without being bound by any theory, it is believed that this unique thermal behavior is attributed to the internal protruding branched moieties and hydroxyl groups, which dramatically slowed down mass transfer starting with the least branched compound (2-branched derivative). The viscosity of the branched compounds was one order of magnitude larger than that of the starting di ester due to the increased branching and increased resistance to flow associated with hydrogen bonding introduced by the OH groups. Overall, these branched diesters demonstrated superior low temperature and flow properties comparable to existing non-sustainable commercial lubricants and analogous biobased materials which makes them suitable alternatives for use in lubricant formulations particularly in high performance industrial gear and bearing lubricants.

Disclosed are detergent compositions for hand dishwashing which, by incorporating certain organic solvents, results in a liquid dishwashing detergent composition that is not only a more effective cleaning agent, but also offers improved physical and enzymatic stability and more convenient rheology and handling characteristics than typical liquid dishwashing compositions.

The invention discloses a production method and a production system of low-volatile vinyl silicone oil. A centrifugal extraction technology is introduced into a synthesis process of vinyl silicone oil, and the vinyl silicone oil is centrifugally extracted to reduce the content of a siloxane ring body. The vinyl silicone oil obtained by centrifugal extraction is taken into a thin film evaporator toremove a solvent to obtain the low-volatile vinyl silicone oil; the solvent obtained by centrifugal extraction is recovered by using a rectifying tower. According to the production method and the production system of the low-volatile vinyl silicone oil, the volatile of vinyl silicone oil is reduced from 0.8wt. % and higher to within 0.1wt. %, equipment costs and production energy consumption arereduced, a production cycle is shortened, and materials can be recycled. At the same time, by changing extraction conditions, solvent types and ratios, the volatile content of products can be easily and accurately controlled and the low-volatile vinyl silicone oils with different quality requirements is produced.

The invention discloses a polymeric reactor and a polyester production method. The polymeric reactor comprises a closed horizontal cylinder. A front end rotating shaft is arranged at the portion, close to a material inlet, inside the cylinder. One end of the front end rotating shaft stretches out from the cylinder and is connected with a first power device. A rear end rotating shaft is arranged at the portion, close to a material outlet, of the cylinder, and one end of the rear end rotating shaft stretches out from the cylinder and is connected with a second power device. A supporting structure for supporting the front end rotating shaft and the rear end rotating shaft is arranged inside the cylinder. A cage frame type stirrer is arranged on the front end rotating shaft. A section of screw-type disc is arranged at the portion, close to the front end rotating shaft, of the rear end rotating shaft. A plurality of sets of coaxial circular rings are arranged at the other parts of the rear end rotating shaft. A plurality of scrapers parallel to the faces of the circular rings are arranged among the circular rings. According to the method, the polymeric reactor is used for performing polyester production to obtain a high-viscosity polyester melt. The cage frame type stirrer is arranged at the front end, the multiple circular rings are arranged at the rear end, and the devolatilization efficiency of equipment can be effectively improved.

A liquid pump dispensing system for dispensing liquids having a wide range of viscosities is described as incorporating a unified approach to determining the dimensions of selected elements of a collection area as a function of the viscosity range of the liquid being dispensed. Four illustrative liquid viscosity ranges are described leading to defining specific values for the physical dimensions of several key elements of the dispensing technique. The dispensing rate is thereby optimized for the full range of viscosities contemplated. An additional complementary feature of slope ranges formed into a bottom shelf feeding into the collection area further optimizes the flow rate and assures a virtually waste free liquid dispensing regimen.

The invention relates to double-sided coating equipment. The double-sided coating equipment comprises front-side coating equipment and back-side coating equipment, wherein the back-side coating equipment comprises a second rack, and a first guide roller, a traction roller, a second guide roller and a second coating roller which are sequentially distributed below a base material in the back-side coating direction of the base material are erected on the second rack; and a glue tank used for infiltrating part of the second coating roller is arranged under the second coating roller, the second guide roller is arranged on one side of the second coating roller, a second scraper is fixed to the other side of the second coating roller, the blade point of the second scraper is connected with the outer surface of the second coating roller in an abutting mode, the front-side coating equipment is located below the back-side coating equipment, and a middle roller is positioned between the front-side coating equipment and the back-side coating equipment. According to the high-efficiency double-sided coating equipment and a processing technology applying the double-sided coating equipment, double-sided coating can be achieved on one coating line.

The invention provides a base fluid for a biomass drilling fluid and a preparation method thereof. The base fluid comprises, by weight, 60 to 90 parts of amino acid alcohol ester, 5 to 30 parts of polyetheramine alkyl glucoside and 5 to 10 parts of methylsilicone oil. The above components are mixed so as to obtain the base fluid for the biomass drilling fluid. According to the invention, amino acid alcohol ester has the advantage that the viscosity of amino acid alcohol ester is slightly influenced by temperature changes as the viscosity of ester substances, and has the characteristics of environment friendliness and biodegradability; through addition of polyetheramine alkyl glucoside, the surface activity of the base fluid is substantially improved, so the base fluid has good ecological security and intermiscibility; and as methylsilicone oil is added, the base fluid has good lubricity, physiological inertness and chemical stability. Thus, the base fluid for the biomass drilling fluid in the invention has the advantages of high environment friendliness, a wide viscosity range, a low freezing point, good lubricity, etc. and can meet performance demands for preparation of base oil for the drilling fluid. The invention also provides the biomass drilling fluid.

A drain pan for oil and other automotive fluids comprises a collection pan having a liner pad consisting essentially of a layer of non-woven synthetic polyester fiber bonded sin binders.