31results about How to "Reduce initial resistance" patented technology

A novel air filter design for use in residential and commercial heating and air conditioning systems comprising a laminated unit having a filter media where the upstream side of the filter media having a porous layer of passive electrostatic netting. The air filter design has a corrugation configuration to increase the available surface area when compared to conventional flat filters.

The present invention provides a reverse opening type slide fastener in which an upper slider and a lower slider can be held at a bottom end of a box pin when an insert pin is pulled out of the upper slider and the lower slider and separated therefrom. The reverse opening type slide fastener (10) has a separable bottom end stop (22) including a box pin (40) provided consecutively from a bottom end of a right element row (13) disposed on a side edge of a right fastener stringer (17), an insert pin (30) provided consecutively from the bottom end of a left element row (12) disposed on a side edge of a left fastener stringer (16), an upper slider (50) which enables the slide fastener to be opened upward and a lower slider (60) which enables the slide fastener to be opened in a reverse direction. A stopper (46) for preventing the lower slider (60) from slipping off is provided at the bottom end of the box pin (40). A first engaging portion (44) is formed on an opposite side edge opposite to the insert pin (30) of the box pin (40) and a second engaging portion (34) is formed on an opposite side edge opposite to the box pin (40) of the insert pin (30) so as to position the insert pin (30) in a downward direction when the second engaging portion engages the first engaging portion (44). A projecting portion (48) which makes contact with the inner face of the blade of the upper slider (50) so as to suppress a free sliding of the upper slider (50) is formed on at least any one of a front side face and a rear side face opposite to the inner face of the blade of the upper slider (50) of the box pin (40).

A non-aqueous electrolyte secondary battery that is obtained using a lithium composite oxide having a layered structure as a positive electrode active material and has a low initial resistance and anincrease in resistance after repeated charging and discharging is suppressed. The non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode active substance layer, which contains a lithium composite oxide having a layered structure. The lithium composite oxide is a porous particle. A surface of the porous particle includes a layer having a rock salt type structure. A thickness of the layer is not less than 5 nm and not more than 80 nm. A void ratio of the porous particle isnot less than 15% and not more than 48%. The porous particle contains two or more voids having diameters that are at least 10% of the particle diameter of the porous particle. The surface of the porous particle includes a coating of lithium tungstate.

Provided is a non-aqueous electrolytic solution for a lithium ion secondary cell that can reduce the initial resistance of the lithium ion secondary cell and can suppress the increase in resistance when the lithium ion secondary cell is allowed to stand at high temperature. The non-aqueous electrolytic solution for a lithium ion secondary cell disclosed herein includes a light metal salt represented by the following formula (I) and a silyl sulfate compound represented by the following formula (II). The content of the light metal salt in the non-aqueous electrolytic solution for a lithium ion secondary cell is 0.1% by mass or more and 1.5% by mass or less. The content of the silyl sulfate compound in the non-aqueous electrolytic solution for a lithium ion secondary cell is 0.1% by mass or more and 5.0% by mass or less (each symbol in the formulas is as defined in the specification).

The invention provides a non-woven needle which comprises a needle bar section, a work section and a needle point section, wherein the work section and the needle point section sequentially extend along a first direction; the work section comprises a first local section, a second local section and a first reducing cone for connecting the first local section with the second local section; a plurality of first hook teeth are annularly distributed on the surface of the first local section; a plurality of second hook teeth are annularly distributed on the surface of the second local section; the diameter of the first local section is greater than that of the second local section; and the depths of the first hook teeth are greater than the depths of the second hook teeth. According to the non-woven needle disclosed by the invention, the work section of the non-woven needle is arranged into the first local section and the second local section of which the diameters are gradually reduced; and the first hook teeth and the second hook teeth are spirally and annularly arranged on the surfaces of the first local section and the second local section. Due to the adoption of the structure, the probability that fabric fibers are hooked by the hook teeth on the surface of the non-woven needle is remarkably improved, the initial resistance of needling is reduced and the production efficiency is increased.

The invention relates to a dust absorption device, which is especially suitable for absorbing the dust of electric welding soot with the grain diameter less than 15 millimeters. The device comprises a plurality of layers of flatbed typed filter screens or / and rippled filter screens with different meshes that are placed inside the frame in an overlapped way and made of stainless material; the periphery of each layer of flatbed typed filter screens or / and rippled filter screens are mutually overlapped via a U-shaped connecting component; a pressure frame is arranged between an upper frame and the U-shaped connecting component, and the pressure frame tightly presses the U-shaped connecting component via a plurality of adjustment bolts arranged on the upper frame; wherein, the outer layers ofthe plurality of layers of filtration screens are provided with strengthened filtration screens respectively. The multilayered overlapped combination of 400 to 1200 meshes forms larger spacing, whichenlarges the filtration area and reduces the initial resistance of the device. The invention has the advantages of simple structure, large dust absorption amount within average area and high purification efficiency. Meanwhile, the filtration screens are made of stainless material, which has the advantages of anticorrosion, easy cleaning and maintenance and long service life, so that the operatingcost is low, the energy consumption is low and the effect of energy conservation is remarkable.

The invention relates to an ultrahigh molecular microporous filter material. The ultrahigh molecular microporous filter material comprises, by mass percent, 77%-81% of ultrahigh molecular weight polyethylene powder, 8.4%-8.8% of high density polyethylene powder, 7.1%-8.3% of hollow glass beads and 4.5%-4.9% of conductive black. Machining equipment of the microporous filter material comprises a charging machine, a speed reducer, an extruder, a reciprocating dragger, a stabilization cavity, a cutting machine and a conveying belt. The charging machine is connected with a charging hopper of the extruder through a charging pipeline. The input end of the extruder is connected with the speed reducer, and the reciprocating dragger, the stabilization cavity, the cutting machine and the conveying belt are sequentially arranged at the output end of the extruder. The ultrahigh molecular microporous filter material is an air purification filter material which is low in cost, long in service life, efficient, low in resistance and capable of filtering away pm2.5. The ultrahigh molecular microporous filter material is high in precision, strength and efficiency, long in service life, capable of being repeatedly utilized and resistant to corrosion and static electricity. Huge linkage economic benefits and social benefits are generated.