Wet filament formation of aramid requires multiple cycles. In order to optimize the yarn formation process and economical, a gear metering pump is required. It not only transports the polymerization liquid to the orifice, but also controls the delivery amount of the polymerization liquid to ensure the quality of the yarn. According to research, the output error of the gear metering pump should not exceed 1.5% (0.0045g / revolution). This metering pump output method has been used in previous chemical fiber production for more than 70 years, but Russia has done very little to improve the gear metering pump itself. In order to improve the durability of the pump parts, the method of changing the material of the pump parts is generally adopted. In Russia, some enterprises have changed all the parts of the metering pump into stainless steel, and the stainless steel contains a high proportion of nickel and chromium. The problem solved is corrosion resistance. It is wear-resistant, but it is easy to cause the friction parts to slip. Another method is to apply a special surface coating to the metering pump parts. The fly in the ointment is that the physical mechanism performance of the aramid yarn is sometimes drastically reduced.
In cooperation with another unit, Russia's Kaminsk Chemical Fiber Co., Ltd. has carried out research and experimental work to improve the aramid-wound gear metering pump, which lasted for five years. The metering pump housing and the friction gear member are made of composite material. The composite material contains polyamide, and the parts made by it have self-lubricating effect, the application of new materials and the reform of the metering pump structure reduce the corrosion effect. Deviation caused by mechanical wear between the parts, the service life of the gear metering pump is increased by 1-2 times, the quality of the aramid yarn is also improved, the breaking load is increased by 0.5-1 times, and the number of broken ends is reduced by more than 60%. .
In agriculture, Estrous Synchronization is used (particularly in the dairy and beef industries) to facilitate breeding by artificial insemination. We have Progesterone Injection, Cloprostenol Sodium Injection and Testerone Propionate Injection and Estradiol Benzoate to solve farmers' different difficultites in aninal 's estrous synchronization.
Estrus Synchronization Medicine
Estrus Synchronization Medicine,Chorionic Gonadotropin for Animals,Estrous Synchronization,Estrus Synchronization for Vet
Jiangxi Institute of Biological Products Inc. , https://www.jxinstitute.com