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34results about How to "Reduce or prevent" patented technology

Adhesive-carrying porous film for battery separator and use thereof

The invention provides an adhesive-carrying porous film for use as a battery separator, which comprises: a substrate porous film such that when a probe of a probe penetrating thermomechanical analyzer, said probe having a diameter of 1 mm, is placed on the porous film under a load of 70 g to measure a thickness thereof while heating the porous film from room temperature at a rate of 2° C./minute, a temperature at which the thickness of the porous film decreases to a half of the thickness of the porous film when the probe was initially placed thereon is 200° C. or more; and a partially crosslinked adhesive carried on the substrate porous film, the partially crosslinked adhesive being prepared by reacting a reactive polymer having a functional group capable of reacting with an isocyanate group therein with a polyfunctional isocyanate so that the reactive polymer is partially crosslinked. Such a porous film (a separator) is temporarily bonded to an electrode to provide an electrode/separator laminate. In manufacturing a battery, the use of the laminate makes it possible to manufacture a battery efficiently with no mutual slip movement between the electrode and the separator, and is addition, the porous film (the separator) itself, after manufacturing a battery, functions as a separator which does not melt or break, and has a small heat shrinkage under high temperatures
Owner:NITTO DENKO CORP

FPGA based descaling system of ultrasonic guided-wave liquid-filled pipe

The invention discloses an FPGA based descaling system of an ultrasonic guided-wave liquid-filled pipe and belongs to the technical field of ultrasonic non-destructive removal. The FPGA based descaling system mainly comprises a signal source generating module, a data acquisition module, a power amplification module, a waveform display module and a driving descaling module. When fouling accumulation is discovered in a liquid-filled pipe, an inputted key can be identified through a DDS controller of an FPGA development board to call a corresponding ROM core, a DA module converts a digital signalin the ROM core into an analog signal so as to generate a voltage signal; a data acquisition device collects the voltage signal and transmits the voltage signal to a power amplifier; the amplified voltage signal drives a wedge-shaped piezoelectric sensor, and the piezoelectric sensor converts the voltage signal into a mechanical vibration signal; the mechanical vibration signal means that ultrasonic guided-wave is spread in the pipe wall, part of energy leaks or is refracted to the fouling part, and the fouling removal effect is realized through the cavatition. The FPGA based descaling systemcan efficiently, rapidly and safely remove fouling and has higher application value in the food and chemical industry.
Owner:TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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