35results about How to "Optimizing the curing process" patented technology

The invention provides a method of monitoring an effective chemical shrinkage rate of a thermoset composite in real time. The method comprises the following steps of: 1) selecting a truncated FBG (fiber bragg grating) group and a temperature reference grating, burying the truncated FBG group and the temperature reference grating in a unidirectional laminate of the thermoset composite, 3) performing curing molding, recording central wavelength variations of the truncated FBG group and the temperature reference grating in a curing process at the same time, 4) subtracting a central wavelength variation value of the temperature reference grating from central wavelength variation values of a long-tail FBG sensor and a short-tail FBG sensor, then dividing by a strain sensitivity coefficient to form strain variations of the long-tail FBG sensor and the short-tail FBG sensor, and 5) selecting a gel point and a glass transition point, and taking a strain variation value monitored by the long-tail FBG sensor between the gel point and the glass transition point at constant temperature stage in the curing process as the transverse effective chemical shrinkage rate of the composite, wherein the truncated FBG group comprises the long-tail FBG sensor and the short-tail FBG sensor. The method is simple, practicable and high in testing accuracy.

The invention provides a method for monitoring and repairing composite material curing adhesive bonding, which belongs to the field of composite material adhesive bonding repair equipment. The method is based on a composite material curing adhesive repair instrument, which includes a body, and a curing source module is provided at the adhesive repair working surface of the body, and the curing source module provides energy for the composite material prepreg to cure, and the curing The source module is surrounded by multiple temperature zones from the inside to the outside. Each temperature zone is equipped with an independent curing source for providing energy to the temperature zone. The multiple temperature zones are used alone or in conjunction with each other, and according to The shape of the damaged area of ​​the structure is determined, and the temperatures of multiple temperature zones are the same or different. The present invention is based on multi-area curing source control, establishes a uniform and stable temperature field under external field conditions, and solves the problem of avoiding excessive temperature differences. Based on the principle of heat conduction, the multi-area temperature field control technology is used to achieve uniform and stable bonding repair areas. temperature field while avoiding excessive temperature differences.

The invention provides a preparation method of a C/SiC composite material. The C/SiC composite material is prepared by preparing a porous C/C composite material by means of an infiltration method. Asa special high-activity porous body C/C is adopted to reactive infiltration, the mechanical property and the anti- ablation property of the material are improved. The preparation method can be also applied to rapid low-cost preparation of a ceramic-based composite material.

The invention belongs to the technical field of medicine synthesis methods, and provides a preparation method of aripiprazole lauroxil. The preparation method comprises the following steps: (1) carrying out a hydroxymethylation reaction: contacting and reacting aripiprazole, an aqueous formaldehyde solution having a mass concentration of 35-40 wt% and an alkali in an organic solvent to obtain hydroxymethyl aripiprazole; and (2) carrying out a lauroylation reaction: contacting and reacting the hydroxymethyl aripiprazole, an organic alkali and lauroyl chloride in a solvent which is immiscible with water at 20-30 DEG C, and then recrystallizing the obtained reaction product in a crystallization solvent to obtain the aripiprazole lauroxil. The method of the invention can improve the yield of the two-step reaction of hydroxymethylation and lauroylation and the purity of the product, and also can shorten the reaction time, simplify the post-treatment process and reduce the material cost.

The invention discloses a preparation method and the application of polyimide varnish. The method comprises the steps of dissolving the refined aromatic diamine and aliphatic diamine into the refined organic solvent, then adding the refined aromatic dianhydride in batches, and stirring and reacting for several hours under the protection of low-temperature inert gas to obtain polyimide varnish; after the varnish is filtered for multiple times, covering the surfaces of microelectronic devices with the varnish such as rectifiers, diodes, triodes, high-power silicon controlled rectifiers, high-voltage silicon stacks, thyristors and the like and large-scale integrated circuit patterns by adopting methods such as drop coating, roller coating, silk-screen printing and the like, and high-insulation, high-strength and then obtaining low-expansion electronic components through stepped heating and curing. The method has the advantages of accessible raw materials and simple operation, and is suitable for large-scale industrial production.

The invention relates to a polyamide pattern painting camouflage fabric printing process and a fabric production and processing method. The printing process is used for printing a pattern painting camouflage color, and vat grey M is added into color paste of the pattern painting camouflage color. The processing method comprises a coating finishing procedure, wherein coating finishing is performed on a waterproof set fabric printed with the pattern painting camouflage color, and a flame-retardant coating is completed according to a sequence of firstly performing bottom glue blade coating and calendaring, then performing middle glue blade coating and finally performing surface glue blade coating; during the bottom glue blade coating, the temperature of a drying oven is controlled to be close to the temperature of a cross-linking agent in a bottom glue formula, the vehicle speed is regulated and controlled, methylbenzene in polyurethane glue is completely volatilized, bottom glue is in a dried state, but part of the cross-linking agent does not completely react to form a net structure, more bottom glue is extruded into yarn gaps of a fabric during subsequent calendaring, and further the cross-linking agent reacts with the polyurethane glue and a curing process is finished. The color fastness of the fabric is stable, and the dark color migration phenomenon is reduced. The production and processing method meets the use requirements of novel equipment such as carrying tools and bulletproof vests.

The invention provides a curing method of a high-efficiency soft porcelain flexible facing brick. The curing method comprises the following steps: 1, preparing a mixed emulsion; 2, preparing mixed powder; 3, adding the mixed emulsion into the mixed powder, adding 5-15 parts of water, and stirring to obtain soft porcelain slurry; 4, injecting the slurry in the step 3 into a mold; and 5, curing. Wherein the curing step comprises microwave curing treatment, meanwhile, due to the fact that a certain temperature exists on the outer layer of the soft porcelain slurry, the whole curing process is carried out inside and outside the soft porcelain slurry at the same time, and in order to further improve the curing efficiency, a wave absorbing agent is further added into the soft porcelain slurry, and the curing efficiency is improved.