30results about How to "The amount added is stable" patented technology

The invention provides a smalt for PVC (Poly Vinyl Chloride) plastic processing, consisting of the following components in percentage by weight: 20-45% of carrier, 5-10% of adjuvant, and 50-70% of pigment. The carrier is one or more of chloride-vinyl resin, chloroethylene-vinyl acetate-maleic acid ternary polymerization resin, chloroethylene-vinyl acetate-hydroxy crylic acid ternary polymerization resin, chloroethylene, PVC or methyl methacrylate. According to the invention, the additive is well dispersed, keeps stable chemical stability and is correct and stable in addition amount. In term of a processing technology, as a powdery additive and resin are quite different in the size of particles, uneven addition in amount often happens. However, as the smalt and PVC particles are very similar in diameter, the addition amount can be kept stable. The addition process is convenient. The smalt can keep the environment clean, and is beneficial to production of PVC products with high quality.

The present invention provides a solution automatic addition system. The objective of the invention is to achieve automation liquid adding and addition stabilization of an antifoaming agent. The solution automatic addition system comprises a liquid medicine addition device, an antifoaming agent addition device and a control device. The liquid medicine addition device comprises a liquid medicine source, a container provided with a liquid outlet pipeline, a liquid inlet pipeline and a siphon pipeline; the liquid outlet pipeline is provided with a first control valve, and the liquid inlet pipeline is provided with a liquid pump; the antifoaming agent addition device comprises an antifoaming agent source and a delivery line; the delivery line is provided with a second control valve and a flowcontrol valve; the control device comprises a liquid level detection device and a controller; the controller controls opening and closing of the second control valve and controls the liquid valve to add liquid in the container according to the liquid level detection device, after the liquid medicine in the container reaches a first preset liquid level, the siphon pipeline can siphon the liquid medicine in the container to the outer portion of the container, and when the liquid level detection device detects that the volume of the liquid medicine in the container is adjusted to a second presetliquid level, the controller controls the first control valve to release the liquid medicine.

The invention relates to a method for preparing organosilicon high-temperature glue, comprising ventilating nitrogen through the bottom pipe and steam through steam coil to increase temperature directly; dehydrating the mixing methyl in the stock, the favorable improvement of the dehydrating effect of this invention compared with previous technique is that after the dehydrating the micro-hydration in stock decreases dramatically, at an average of below 10ppm. The addition quantity of regent for head closure in the polymerization process preparing high-temperature glue gradually becomes stable, the molecular weight of raw rubber polymerization is relatively stable. The quantity of terminal hydroxyl group decreases dramatically in the high-temperature glue preparing process, the moulding is faster in the process, the storing time of the mixed glue and its physical-mechanical properties and processing property have been improved considerably.

The invention aims to provide an engineering plastic processing device and a glass fiber content control method. The engineering plastic processing device comprises a double-screw extruder with a discharge hole in the front end, a particle main ingredient weigh-feeding mechanism and a glass fiber weigh-feeding mechanism located above the double-screw extruder, and a controller. The double-screw extruder comprises a cylinder, two screw rods arranged in the cylinder, and a motor electrically connected with the controller; and a particle main ingredient feed inlet corresponding to the particle main ingredient weigh-feeding mechanism, a frustum-shaped glass fiber guiding port connected with the cylinder and corresponding to the glass fiber weigh-feeding mechanism, and a vacuum orifice are sequentially arranged on the cylinder from back to front. According to the engineering plastic processing device, the addition amount of glass fiber is stable, the error is less, the accuracy in detectingthe glass fiber content in engineering plastic is higher, and the glass fiber content can be monitored and adjusted in real time.

The invention discloses a beneficiation method for copper and lead zinc separation by adopting liquid sulfur dioxide and solves the problems that in the existing method, the influence is generated on the separation operation concentration, and further, the effective separation of copper from lead zinc is not favorably realized. The beneficiation method adopts a sulfur dioxide addition regulating control system, and the copper and lead zinc separation comprises the following specific processes that A, sodium sulfide is added into ore pulp for stirring; B, sulfur dioxide is added into the ore pulp for stirring through the addition regulating control system; C, liquid sulfur dioxide enters the ore pulp in a gas state through being gasified by the regulating control system; and D, the pH value of the ore pulp is regulated to 6.0 to 6.7, and then, the copper and lead zinc sulfide separation flotation is carried out. The beneficiation method has the advantages that the sulfur dioxide is added into the ore pulp, the ore pulp concentration can be effectively improved, meanwhile, the sulphurous acid concentration in the ore pulp can also be ensured, the sodium sulfide is also added into the ore pulp, and the separation effect of copper and lead zinc sulfide can be further improved.

The invention relates to a cellulose triacetate film. Preparation steps comprise preparation of a cellulose triacetate celloidin liquid, dispersion and addition of a matting agent and tape casting, wherein in the dispersion and addition link of the matting agent, the matting agent is mixed and dispersed through ultrasonic cavitation and mechanical stirring, the dispersing time and the grinding time of the matting agent are effectively shortened by means of a method of controlling a flow rate of a pipeline, an agglomeration phenomenon in the matting agent adding process is avoided, and in the dispersion liquid adding process, the content of particles, less than 10 [mu]m, of the matting agent is stabilized to 99.5% above, so that the service life of a filter element is effectively prolonged, and the cost is lowered. Compared with the prior art, the cellulose triacetate film prepared by the invention has the advantages of being low in haze, high in light transmittance, few in crystal points, few in moisture absorption points and the like.

The invention provides a liquid constant-volume automatic adding system to achieve the goals of automatic liquid adding and stable adding amount of liquid. The liquid constant-volume automatic addingsystem comprises a liquid source, a container provided with a liquid-outlet pipeline at the bottom, a liquid-inlet pipeline, a siphoning pipeline and a control device, the liquid-outlet pipeline is provided with a first control valve, the liquid-inlet pipeline is provided with a liquid pump, the control device comprises a liquid level detection device and a controller, and the controller controlsthe liquid pump to add the liquid to the container according to a detection value of the liquid level detection device until the liquid reaches a first preset liquid level. When the liquid in the container reaches the first preset liquid level, the siphoning pipeline can siphon the liquid in the container to the outside of the container to enable the liquid in the container to reach a second preset liquid level in a constant-volume manner; and when the liquid level detection device detects that the liquid in the container reaches the second preset liquid level in the constant-volume manner, the controller controls the first control valve to release the liquid.

A degradable compressive discoloring plastic color masterbatch consists of the following substances by the mass fraction: 10-30% of a pigment, 10-40% of a filler, 0.1-1% of a coupling agent, 0.5-5% ofa lubricant, 40-80% of a carrier and 4-10% of a pressure sensitive discoloring material. With polylactic acid or butylene terephthalate as a carrier, the proportion of the pigment and the additive isoptimized, the degradable compressive discoloring color masterbatch is obtained, has the advantages of uniform coloring, low cost, easy control of processing technology, excellent dispersibility andthe like, and has broad industrial application prospects.

The invention relates to a feeding machine, and particularly relates to an automatic quantitative glass fiber feeding machine. The automatic quantitative glass fiber feeding machine comprises a rack which is provided with a feeding mechanism, a scattering mechanism and a controlling device, wherein the feeding mechanism comprises a driving drum and a plurality of transmission drums which are continuously horizontally arranged along the length direction of the rack, the scattering mechanism comprises a needling roller which is movably arranged on the rack in front of the driving drum along the forward direction of a material and is parallel to the driving drum, and a weight sensor is arranged at the bottom of the rack and is connected with the controlling device. The automatic quantitative glass fiber feeding machine has a reasonable structure, is convenient and practical, can feed quantitative glass fibers automatically, enables the adding amount to be stable and the quantity to be controllable, greatly lowers the labor intensity of workers, and improves the work efficiency and the product quality.

The invention relates to a granulation external lubricant adding system, and belongs to the field of resin synthesis. The system comprises a liquid storage tank, a liquid level meter, a metering pump, a valve, a pipeline and an electrical control cabinet which are arranged on a same base, and the liquid storage tank is used for storing a liquid external lubricant and is connected with a mineral oil storage tank through a mineral oil pump; the liquid level meter is used for monitoring the liquid level in the liquid storage tank and is arranged on the liquid storage tank; the pipeline is communicated with the liquid storage tank and a granular material air conveying pipe; the metering pump is used for quantitatively pumping the liquid lubricant and is arranged on the pipeline; and the electrical control cabinet is used for controlling the system and is communicated with the liquid level meter and the metering pump. The invention further provides a granulation external lubricant adding method which is applied to the system. The liquid lubricant is adopted to replace a powdery lubricant, so that the appearance of product particles is improved, the production cost is reduced, and the product processing efficiency is improved; and meanwhile, dust pollution is reduced, and environmental protection and emission reduction are facilitated. The system provided by the invention is compact in structure, small in occupied area and easy to install.

The invention discloses a defoaming agent adding device for chlorosulfonated polyethylene wet condensation post-processing. The defoaming agent adding device is characterized by comprising a defoaming agent metering tank and a defoaming agent metering pump; an outlet in the bottom of the defoaming agent metering tank is connected with an inlet of the defoaming agent metering pump; an outlet of the defoaming agent metering pump is connected with the top of a 1# condensation kettle. A working process of the defoaming agent adding device comprises the following steps: detecting that all valves of the device disclosed by the invention are in a closed state, the defoaming agent metering pump is in a closed standby state, and all pipelines do not leak; adding a defoaming agent into the defoaming agent metering tank; opening a discharging valve, a first feeding valve, an outlet valve and a second feeding valve in sequence; starting the defoaming agent metering pump and observing the operating situation of the defoaming agent metering pump to ensure that the defoaming agent enters the 1# condensation kettle stably and quantitatively. The defoaming agent adding device for the chlorosulfonated polyethylene wet condensation post-processing has the advantages that the acting position is precise, the defoaming agent works while being added, the adding amount is stable, the operation is simple and convenient, and the labour intensity is reduced.

The invention relates to the technical field of polypropylene, in particular to a preparation method of a medical transparent polypropylene material. The medical transparent polypropylene material is prepared from the following raw materials in parts by weight: 100 parts of homo-polypropylene resin, 0.2-0.4 part of a transparent nucleating agent, 2-6 parts of phthalate, 7-15 parts of a toughening agent, 6-28 parts of expansible graphite, 1-4 parts of a halogen-free flame retardant, 0.3-1.8 parts of a coupling agent, 0.3-2.4 parts of an antistatic agent, 65 parts of a curing agent, 10-30 parts of a coloring agent, 0.3-0.6 part of an antioxidant, 0.4-1.5 parts of lubricating grease, 3-5 parts of a stabilizer and 10-40 parts of low-dielectric-loss glass fiber. The medical transparent polypropylene material is excellent in oxidation resistance, has good antistatic property, is convenient to color, and is high in thermal stability, high in fluidity and high in transparency.

The invention discloses a special master batch for a nucleic acid detection kit. The special master batch is prepared by the following steps: preparing raw materials, preparing white color master batch, various pigments and toning, mixing and coloring a certain amount of white color master batch and a certain amount of various pigments, grinding the color master batch, pouring the color master batch mixed by the color and white color master batch into a crushing grinding machine, carrying out crushing grinding, melting and cooling, pouring the ground color master batch powder into an extruder,stirring and extruding the color master batch powder and water by the extruder through a screw rod, directly cooling, shaping and shearing the extruded color master batch through cold water, and directly pushing the cooled and shaped color master batch into a granulator for granulating and sub-packaging.