48results about How to "Radiation resistance" patented technology

An antenna system is presented including an electrically conductive radiating mast that extends generally vertical relative to earth ground. The mast has a lower end for receiving RF energy for radiation thereby at an operating RF frequency and an upper end. A plurality of N radial, electrically conductive, wires are provided with each having an inner end and an outer end. The inner ends of the radial wires are electrically connected together and located proximate to the vertical mast. The radial wires are elevated throughout their lengths above the level of earth ground and extend radially outward from the vertical mast. A tuning device, such as an adjustable inductor, is connected to the radial wires for adjusting the impedance thereof such that the radial wires resonate at the operating frequency.

The present invention provides a method of producing a latent polarized image having high contrast characteristics with no apparent contours or traces of the image under normal visualization. A polymer solution is prepared in an organic solvent, and then applied onto a light-reflecting substrate. The polymer layer is dried to produce an optically isotropic polymer layer and anisotropic images are formed on the polymer layer. The polymer solution's concentration is from 5 to 30% by weight, and the images are formed by application of micro-lines by thermo-mechanical means, having depths from 1 to 3 μm and being separated from one another by 4 to 6 μm at a process rate from 10 to 50 m / min. The thermomechanical means operates at a temperature that is 10 to 60% less than the polymer melting / disintegration temperature and contacts the polymer layer to form micro-lines for 0.015 to 0.650 msec.

A radiation resistant single-mode optical fiber has a core and a cladding, each made of fluorine-doped silica glass, in which a chlorine concentration of the core is at least 0.01 ppm, a relative refractive index difference of the core based on the refractive index for silica is between −0.30% and −0.10%, a relative refractive index difference of the core based on the refractive index for the cladding is between 0.3% and 0.5%, a cutoff wavelength is 1.27 μm or below, and a bending loss at a wavelength of 1.3 μm and a bending diameter of 20 mm is 0.5 dB / m or less.

The invention provides a method for preparing a polystyrene composite material for packaging boards, comprising the following steps: (1) soaking polycrystalline iron fibers in water and then stirring and dispersing them; drying to obtain purified polycrystalline iron fibers; (2) acrylic acid and AIBN are mixed uniformly to obtain a graft liquid, and the purified polycrystalline iron fibers are cut and dissolved in thionyl chloride, and a suspension is obtained after stirring. Add the suspension into the grafting solution and place it in an ultrasonic cleaner, vibrate it ultrasonically, distill the material under reduced pressure, filter, wash, and dry to obtain a modified polycrystalline iron fiber; (3) polystyrene resin, antioxidant , Polythiophene is dissolved in toluene and mixed to obtain a mixed solution. The modified polycrystalline iron fiber is immersed in the mixed solution. After the toluene is completely volatilized, it is spread in the mold, heated and molded to obtain a polystyrene composite material for packaging boards. . The composite material prepared by the invention has good wave-absorbing ability and can effectively resist electromagnetic wave radiation.

The invention relates to a textile fabric for healthy casual pants, which is composed of an inner layer fabric, an outer layer fabric and a metal film. The weight of each component of the inner layer fabric is: mercerized cotton 26~30 parts, hemp fiber 30~40 parts 30-44 parts of silk and 30-44 parts of real silk, the weight of each component of the outer fabric is: 26-32 parts of tencel and 14-19 parts of soybean fiber, and the metal film covers the surface of the inner fabric . The textile surface of the healthy casual pants of the present invention can be worn next to the body, and can effectively resist the radiation of external electromagnetic waves and reduce the damage of electromagnetic waves to the human body.

The invention discloses furfuryl alcohol resin wood and a modification treatment process. The furfuryl alcohol resin wood comprises a wood body, a sliding block, a sliding groove, positioning holes, threaded holes, concave grooves, fixing bolts, a polyvinyl chloride coating, a wear-resistant layer, a wood grain layer, an anti-corrosion layer, a balance layer, through holes, a mounting groove, a spring and a ball, wherein the sliding block is installed on one side of the wood body, the positioning holes are formed in the two ends of the outer side of the sliding block correspondingly, the threaded holes are formed in the two sides of the top end of the sliding block correspondingly, the sliding groove is formed in one side of the wood body, and the concave grooves are formed in the two endsof the top end of the sliding groove correspondingly; and the through holes are formed in the centers of the interiors of the concave grooves, the fixing bolts are arranged inside the through holes,and the fixing bolts are connected with the threaded holes in a matched mode; according to the wood and the process, the treatment process comprises the following steps of preparing the furfuryl alcohol resin; degreasing; cleaning and drying; cross-linking treatment; acetylation and cyanation treatment; resin impregnation treatment; wood bleaching and dyeing, so that the wear resistance and the corrosion resistance of the furfuryl alcohol resin wood are effectively ensured.