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89results about How to "Increase static electricity" patented technology

Laser initiation flyer type initiating explosive-free detonator

The invention belongs to the field of initiation apparatuses, and discloses a laser initiation flyer type initiating explosive-free detonator. The detonator comprises a detonator matrix filled with three-times high explosive, a detonator exciting device consisting of an inner cap and four-times explosive, and a laser initiation system, wherein the laser initiation system consists of a rubber plug, an optical fiber and a laser generating device connected with the optical fiber; the rubber plug is plugged into the inner cap in a detonator shell, the outer surface of the rubber plug is in tight fit with the inner walls of the detonator shell and the inner cap, the middle of the rubber plug is provided with a through hole, the optical fiber connected with the laser generating device passes through the hole, the end of the optical fiber is flush with the lower port of the rubber plug, and the distance between the lower port and the surface of the four-times explosive in the inner cap is less than 15 millimeters; and the laser wavelength of the laser generating device is in a range of 500 to 1,500 nanometers, the optical fiber is a single mode fiber or a multi-mode fiber, and the energy of the laser output by the optical fiber is more than 0.4W. Through the detonator, initiation of the non-dispersed four-times explosive is realized, and the reliability and the safety of the initiation system are improved; and because the transmission optical fiber has high-temperature and high-pressure resistance, the detonator is suitable for severe environments of deep water, high pressure and the like.
Owner:UNIV OF SCI & TECH OF CHINA

Preparation method of elastic polyester fiber and flax fiber blended yarns by adopting bio-enzyme method

The invention discloses a preparation method of elastic polyester fiber and flax fiber blended yarns by adopting a bio-enzyme method. The weight content of flax fibers is 45 percent to 75 percent and the balance is elastic polyester fibers; the preparation method comprises: pre-treating, blowing, cotton carding, drawing, roving, degumming, bleaching, acid washing, washing and spinning. By adopting the preparation method provided by the invention, the elastic polyester fiber and flax fiber blended yarns with moisture absorption, lightness and thinness, glossiness, air permeability, antibacterial property and mite inhibition property can be prepared. The elastic polyester fiber and flax fiber blended yarns provided by the invention have high spinnability and good elasticity; cloth woven by the elastic polyester fiber and flax fiber blended yarns is light and soft, comfortable and breathable, has sweat-absorbing and antibacterial properties and has elasticity; the cloth has novel and fashionable appearance. The elastic polyester fibers and the flax fibers are blended and the disadvantage of low elasticity of the flax fibers can be made up; a prepared fabric has a comfortable hand feeling and has good elasticity; the style of the blended yarns can be improved and the hand feeling of the blended yarns can be improved.
Owner:JIANGSU HUAXIN LINEN TEXTILE

Steel sheet tin filling grounding process

The invention discloses a steel sheet tin filling grounding process, comprising a steel sheet, a flexible circuit board and an electronic component arranged on the circuit board. The electronic component is located on the front of the circuit board, and the steel sheet is located on the back of the circuit board. The circuit board is provided with a through hole in the position corresponding to the electronic component. One end of the through hole is communicated with the electronic component, and the other end of the through hole is communicated with the steel sheet. After tin is poured intothe through hole, the electronic component is connected with the steel sheet. After tin is solidified on the steel sheet, the electronic component and the steel sheet are fixedly combined, a tin layeris formed between the circuit board and the steel sheet, and the steel sheet is tightly combined with the circuit board through the tin layer. Through the process, an FPC-tin layer-steel sheet structure is obtained. The grounding impedance of the FPC and the steel sheet can be greatly reduced, and the static electricity and the overall performance can be significantly improved. Moreover, a conductive adhesive bonding process is avoided, and the cost is reduced.
Owner:蚌埠华特科技有限公司
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