Wide band electromagnetic wave-shielded polyethylene compound film containing carbonyl iron powder and preparation method thereof
A carbonyl iron powder and electromagnetic wave technology is applied in the field of polyethylene film capable of shielding broadband electromagnetic waves and its preparation, which can solve problems such as inability to shield electromagnetic waves, and achieve the effects of widening the electromagnetic wave shielding range, good compatibility and high electrical conductivity.
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[0028] The preparation of nickel-plated carbon fiber in the embodiments of the present invention can specifically adopt the following steps:
[0029] Soak 5g of the above-mentioned carbon fiber with a length ranging from 1 to 50mm in acetone for 1 hour, wash it with distilled water; then oxidize it in hot air at 420°C for 1 hour, and then boil it in 40% nitric acid for 20 minutes to roughen it. Wash with deionized water to neutral afterwards, carry out suction filtration with circulating water vacuum suction filter (model: SHZ-D, Tianjin Huaxin Instrument Factory); then wash with 0.1ml / l dilute hydrochloric acid, suction filtration, and carry out repeatedly 3 times; then wash and filter repeatedly with deionized water until the carbon fiber is neutral; then put the carbon fiber in an electric blast drying oven at 100°C (model: GW-1BS, Shanghai Yiheng Technology Co., Ltd.) and dry for 8 hours , take it out and set aside. The above dried 5g carbon fibers were immersed in deioni...
Embodiment 1-1～ Embodiment 1-16
[0044]Add the 1-50 mm long carbon fiber after acid oxidation treatment, carbonyl iron powder, polyethylene resin and KH-570 diluted with acetone to 100 parts by weight of polyethylene resin into a high-speed mixer Mix thoroughly. The mixed pellets are blended with an open double-roller mixer, the blending temperature is 150 °C for the front roll, and 155 °C for the rear roll, and blended for 5 min; the mixed material is pressed into a 2 mm thick sheet with a flat vulcanizer ( The processing temperature of the upper and lower plates of the flat vulcanizer is 170°C, the pressure is 150kg / cm2, and the pressing time is 6min). Cut the sheet into pellets with a length and width of 1-3mm and a thickness of 2mm with a knife; blow the film on the film blowing machine, and the film blowing temperature in zones 1-6 is 158°C, 158°C, 160°C, 162°C, 164°C °C, 166 °C. Aluminum plating is carried out on the blown film. During the aluminum plating process, the vacuum degree of the bell jar is...
Embodiment 2-1～ Embodiment 2-16
[0047] Add the nickel-plated carbon fiber with a length of 1 to 50 mm prepared above, carbonyl iron powder, polyethylene resin and KH-570 diluted with acetone to 100 parts by weight of polyethylene resin, and add it to a high-speed mixer and mix thoroughly . The mixed pellets are blended with an open double-roller mixer, the blending temperature is 150 °C for the front roll, and 155 °C for the rear roll, and blended for 5 min; the mixed material is pressed into a 2 mm thick sheet with a flat vulcanizer ( The processing temperature of the upper and lower plates of the flat vulcanizing machine is 170°C, and the pressure is 150kg / cm 2 , pressing time 6min). Cut the sheet into pellets with a length and width of 1-3mm and a thickness of 2mm with a knife; blow the film on the film blowing machine, and the film blowing temperature in zones 1-6 is 158°C, 158°C, 160°C, 162°C, 164°C °C, 166 °C. Aluminum plating is carried out on the blown film. During the aluminum plating process, th...
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