32results about How to "Shorten degassing time" patented technology

The present invention relates to a crosslinkable polymer composition comprising an unsaturated polyolefin having a total amount of carbon-carbon double bonds/1000 carbon atoms of at least 0.38, and at least one crosslinking agent being a carbon-carbon initiator that is free of peroxide groups and capable of thermally decomposing into carbon-based free radicals by breaking at least one carbon-carbon single bond, such as 3,4-dimethyl-3,4-diphenylhexane.

The invention relates to an environmental-friendly curtain adhesive for a hair product and a preparation method thereof. The environmental-friendly curtain adhesive for a hair product is compatibly dissolved and synthesized by the following raw materials in parts by weight: 0.05 part of alcohol-soluble polyurethane adhesive b, 0.04 to 0.15 part of sugar ester, 0.05 to 0.25 part of rosin, 0.05 to 0.4 part of curing agent of alcohol-soluble polyurethane adhesive, 0.01 to 0.08 part of sodium persulfate and 0.15 to 0.75 part of absolute ethyl alcohol. In the preparation method, the thermal decomposition type sodium persulfate is used as the initiator to avoid pollution caused by a decomposition product remained in the adhesive when the organic peroxide is used as the initiator; the high-temperature polymerization replaces the low-temperature polymerization to reduce the energy consumption; the conversion rate of the polymerization reaction is improved and the quantity of the recovered monomer is reduced; the physical degasification and the chemical degasification are combined, so that the degasification time is shortened and the energy consumption is reduced.

The invention belongs to the field of high-performance fibers, and particularly relates to a preparation method of poly(p-phenylene benzobisoxazole) fibers. The preparation method comprises the following steps of taking frozen polyphosphoric acid powder, phosphorus pentoxide, 4,6-diaminoresorcinol hydrochloride and terephthalic acid as raw materials, putting the phosphorus pentoxide into a reaction system step by step in a reasonable proportion in a proper time period, and detecting and regulating the apparent viscosity of the materials in real time in a prepolymerization process to ensure that a prepolymer with uniform apparent viscosity is obtained; performing post-polymerization to obtain PBO spinning slurry; and performing dry-jet wet spinning and post-spinning to obtain the finished PBO fibers. The method overcomes the defects that traditional solid raw materials are poor in solvent mixing and dispersing effect, easy to agglomerate and incapable of uniformly reacting, ensures the consistency of a prepolymerization reaction end point, and reduces the process errors. The intrinsic viscosity of the polymer in the same batch in different time periods is small in change and high, the mechanical property of the fibers can be obviously improved, and the quality stability is also improved.

The invention discloses a 66-500kV crosslinked cable short-degassing online treatment process. A process flow comprises conductor preparing; three-layer co-extruding and insulating and online degassing; and degassing in a drying room, wherein the step of three-layer co-extruding and insulating and online degassing specifically comprises three-layer co-extruding of a conductor shielding layer, an insulating layer and an insulating shielding layer; crosslinking; cooling; secondary heating; and cooling; the secondary heating is carried out under protection of nitrogen atmosphere, the nitrogen concentration of the nitrogen atmosphere is controlled over 98%, the nitrogen temperature is controlled at 220+/-5 DEG C, and the conductor temperature is controlled at 90 DEG C. According to the 66-500kV crosslinked cable short-degassing online treatment process disclosed by the invention, the insulating layer is not aged during degassing, the degassing rate is high, the byproduct removal effect is good, the degassing time of the drying room can be greatly shortened, the production period is shortened, and energy is saved and emission is reduced.

A process for preparing food-class butadiene-styrene rubber with high conversion rate 85-98% includes such steps as high-temp emulsion polymerizing between conjugated diolefin and styrene, and as well as water-soluble peroxide as trigger and food-class surfactant as emulsifier, vacuum degassing, coagulating, and drying.

The present invention relates to an olefin polymerization process, wherein propylene and 1-butene and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst system so as to obtain a polypropylene, wherein the polypropylene comprises 1-butene-derived comonomer units in an amount of from 0,5 to 15 wt% and optionally ethylene-derived comonomer units in an amount of up to 3 wt%, and the Ziegler-Natta catalyst system comprises an external donor of the formula (I) (R3)z(R2O)YSi(R1)x (I).

The invention discloses a submarine cable tray degassing chamber. The submarine cable tray degassing chamber comprises a rotary disc chassis base; a rotary disc is arranged below the rotary disc chassis base; a side guide rail is arranged on the outer side of the rotary disc; a driving motor is arranged below the rotary disc chassis base; the driving motor is connected with the side guide rail through a driving roller; an inner cylinder and an outer cylinder are arranged above the rotary disc chassis base; a heating air pump is arranged in the inner cylinder; a detachable top cover is arrangedabove the inner cylinder and the outer cylinder; wire arranging devices are arranged on the two sides of the rotary disc chassis base; and tractors are arranged at the outer ends of the wire arranging devices. Compared with the prior art, the submarine cable tray degassing chamber has the beneficial effects of being simple in structure, convenient to use and operate and capable of greatly improving the working efficiency.

The invention provides an integrated expansion kettle which comprises a kettle body, a cooling liquid flow channel penetrating through a cavity is formed in the kettle body, and at least one gas-liquid separation structure is arranged on the cooling liquid flow channel. Each gas-liquid separation structure comprises a first opening and a second opening, wherein the first opening is formed in the cooling liquid flow channel and used for allowing liquid in the cavity to flow into the cooling liquid flow channel, the second opening is used for allowing the liquid in the cooling liquid flow channel to flow into the cavity, and the pressure intensity of the first opening is larger than that of the second opening. The cooling system comprises a motor cooling loop, a battery cooling loop and the expansion kettle. The automobile comprises the cooling system. According to the gas-liquid separator, separation is conducted in two sections, the gas-liquid separation efficiency is guaranteed, abnormal sound is eliminated, the degassing time of gas-liquid separation is shortened on the whole, heat leakage is reduced, and the temperature difference between a liquid inlet and a liquid outlet can be greatly reduced.

The invention discloses a movable degassing machine, and relates to the technical field of molten aluminum purification treatment equipment. The machine comprises a stirring container, an adjusting device, a stirring device, a rotating device, a moving device, a fixing device and a ventilation device; the moving device and the fixing device are placed on two sides of the stirring container; the rotating device is placed above the stirring container and is connected with the fixing device and the moving device; the adjusting device, the stirring device and the ventilation device are arranged onthe rotating device; the adjusting device comprises a supporting column, a rotating disc, an adjusting motor, a driving connecting rod, a driven connecting rod, an extensible rod, an adjusting pipe,an adjusting rod, a moving pipe, a moving sliding block and a moving sliding groove; the supporting column penetrates through the center of the rotating disc and is fixedly connected with the rotatingdisc; and a supporting base is fixed to the position, close to the supporting column, on the upper end surface of the rotating disc. The adjusting motor rotates to drive the moving pipe to move on the rotating disc, the stirring position of the stirring device can be adjusted, the stirring device can adapt to larger stirring containers, and the one-time stirring amount is greatly increased.

The invention discloses a smelting preparation method suitable for a Mo 4000 series aluminum alloy cast ingot, and relates to the technical field of nonferrous metal material preparation. The invention aims at solving the problem that the casting yield is low due to the fact that the Mo element segregation condition is prone to occurring in the traditional casting process of the Mo-containing aluminum alloy. The method comprises the following steps: heating an aluminum ingot and an Al-Si20 intermediate alloy until the aluminum ingot and the Al-Si20 intermediate alloy are completely molten, adding Al-Mo5 intermediate alloy particles, keeping the temperature, adding an Al-Sr10 intermediate alloy, modifying an aluminum alloy melt, stirring, continuously heating, analyzing and adjusting alloy components, refining and degassing by using inert gas after the components are qualified, filtering, and casting, and a grain refiner is added during casting, and homogenization treatment is carried out after casting is completed, so that the Mo 4000 series aluminum alloy cast ingot is obtained. The smelting preparation method suitable for the Mo 4000 series aluminum alloy cast ingot can be obtained.

Disclosed is a degassing device for preparing a secondary battery, the degassing device including a piercing chamber configured to accommodate a first amount of degassing target pouches and having an internal space in which a pressure is selectively controlled to a vacuum pressure or an atmospheric pressure, the piercing chamber including a piercing unit configured to form inner gas discharge paths in the first amount of degassing target pouches, a first buffer chamber having an internal pressure maintained as the vacuum pressure and configured to accommodate the first amount of degassing target pouches unloaded from the piercing chamber, a sealing chamber having an internal pressure maintained as the vacuum pressure and having a sealing unit configured to receive the first amount of degassing target pouches accommodated in the first buffer chamber while sequentially receiving a second amount of degassing target pouches smaller than the first amount of degassing target pouches.