5results about How to "Increase spinning speed" patented technology

The invention discloses a preparation method of plateau fibrillated Lyocell fibers, and belongs to the technical field of cellulose fiber preparation. The preparation method comprises the following steps: step SS1: adding propyl gallate, a crystallization promoting agent and a delustering agent into a solvent NMMO with the mass concentration of 65 + / -5%, and stirring and dispersing to obtain a mixture A; step SS2, adding wood pulp into the mixture A, and stirring to obtain a mixture B; step SS3, heating the mixture B, and carrying out reduced pressure evaporation dehydration until the cellulose is completely dissolved, so as to obtain a spinning solution with the cellulose concentration of 7-11wt%; and step SS4, extruding the spinning solution from the spinneret plate, cooling in a coagulating bath, drafting and forming to obtain the plateau fibrillated Lyocell fiber. According to the preparation method of the plateau fibrillated Lyocell fiber, the technical problems that plateau fibrillated fabric is tedious in processing flow, long in processing time, serious in scratching and large in influence on fabric quality are effectively solved.

The present invention relates to the technical field of aramid production, and specifically to a liquid crystal spinning method for heterocyclic aramid fiber, wherein the spinning method is as follows: S1, preparation of heterocyclic aramid polymer powder: diamine monomer, third monomer and terephthaloyl chloride are subjected to polymerization reaction in a twin-screw polymerization reactor, and after the reaction, the powder is neutralized, ground, washed and dried with an alkaline substance to obtain a heterocyclic aramid polymer powder; S2, preparation of heterocyclic aramid fiber: the heterocyclic aramid polymer powder is dissolved, filtered and degassed with concentrated sulfuric acid to obtain a liquid crystal spinning solution, and then subjected to a dry-jet wet spinning process: spinning, coagulation molding, washing, neutralization, washing, drying and heat drawing to obtain the heterocyclic aramid fiber; the neutralizer used in the neutralization process of step S2 is a weak alkali aqueous solution. The heterocyclic aramid fiber obtained by the spinning method of the present invention has higher mechanical properties, less lint and good softness, and can meet the application requirements of aerospace.

This utility model relates to the technical field of core-spun yarn equipment, specifically to a multifunctional high-speed guide roller core-spun yarn device, comprising a column mounted on top of a machine base, a support on the column, bearing seats arranged on the support, guide rollers connected to the bearing seats, filament cakes arranged between the guide rollers, a first connecting plate between the bearing seats, the two ends of the first connecting plate connected to the support, a guide assembly on the first connecting plate, bearings sleeved at the ends of the guide rollers, the bearings connected to the bearing seats, and the guide rollers connected to each other via a cross slider. This utility model can realize the switching between elastic and non-elastic core-spun yarn spinning on the same machine, effectively improving the production efficiency of core-spun yarn.

The invention relates to a titanate precursor sol spinning solution, a Ti < 3 + > self-doped titanate fiber photocatalyst and a preparation method and application of the Ti < 3 + > self-doped titanate fiber photocatalyst. According to the preparation method, PAT or PET is taken as a titanium source, metal acetate is taken as a metal source, low-carbon alcohol and organic carboxylic acid are taken as solvents, and the titanate fiber photocatalyst or the Ti < 3 + > self-doped titanate fiber photocatalyst is successfully prepared through a sol-gel combined electrostatic spinning technology. The organic carboxylic acid is introduced to be used as one of solvents to dissolve acetate, and is also used as a ligand to coordinate with metal ions, so that the organic carboxylic acid has certain spinnability, meanwhile, a titanium precursor is protected from being hydrolyzed, and the spinnability and the stability of the obtained spinning solution are both excellent. The method disclosed by the invention is simple in process, is safer, more environment-friendly and more reliable compared with a method for preparing the Ti < 3 + > self-doped titanate fiber photocatalyst by using strong reducing substances such as H2 and NaBH4, and shows good catalytic performance.

The invention provides a self-suction high-speed revolving cup servo motor adopting an air bearing, and relates to a servo motor of a high-speed revolving cup spinning machine, the self-suction high-speed revolving cup servo motor comprises a high-speed servo motor, a sensor module, a revolving cup component and a control module, the high-speed servo motor comprises a machine base, and a front end cover and a rear end cover are installed at the front end and the rear end of the machine base respectively; the high-speed servo motor further comprises a stator and a rotor, the stator is located in the machine base, the rotor is located in the middle of the stator, the rotor and the main shaft are coaxially connected and rotate synchronously, air bearings are installed at the two ends of the rotor, the air bearings adopt the air flotation technology, and the sensor module is located in the high-speed servo motor. The control module is located at the outer end of the rear end cover. The rotor part is driven in a direct drive mode, the air bearing is adopted, the transmission efficiency is improved, the spinning speed is increased, and meanwhile the service life of equipment is prolonged.