Flame-resisting anti-static polythene compound film for shielding wide band electromagnetic wave and its preparing method

A technology of flame-retardant polyethylene and polyethylene film, applied in the direction of static electricity, magnetic field/electric field shielding, electrical components, etc., can solve the problems of inability to shield electromagnetic waves, etc., achieve good flame-retardant effect, good processing dispersion, and broaden the shielding range Effect

Inactive Publication Date: 2007-10-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0009] Aiming at the disadvantage that polyethylene cannot shield electromagnetic waves, the invention uses magnetic electromagnetic wave shielding additives to add to polyethylene resin to make antistatic and electromagnetic wave shielding polyethylene film, so that it can absorb electromagnetic waves in

Method used

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  • Flame-resisting anti-static polythene compound film for shielding wide band electromagnetic wave and its preparing method

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Embodiment 1～4

[0065] Pellet preparation of flame retardant polyethylene film:

[0066] Take PNPIC and nano-layered kaolin and dry them in a blast drying oven for 2 hours at a temperature of 95°C. Add the dried flame retardant system and polyethylene resin to a high-speed mixer for preliminary mixing. Get diluted titanate coupling agent NDZ-101 (the addition of coupling agent NDZ-101 is 1.25 parts based on polyethylene resin as 100 parts by weight, and liquid paraffin of the same weight is added in the coupling agent to dilute the coupling agent. Joint agent) into the high-speed mixer, at 1200 rpm, 70 ° C under high-speed mixing for 10 minutes. The mixed pellets are added to the main feeding port of the twin-screw extruder, and the feeding speed is respectively: the screw rotation speed of the twin-screw extruder is 1000r / min, and the feeding speed of the main feeding port is 400r / min. Among them, the temperature of zone 1 to zone 7 on the extruder is 150°C, 155°C, 160°C, 170°C, 170°C, 170°...

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Abstract

The invention provides a fire retardant antistatic polyethylene compound film for screen broadband electromagnetic wave and the producing method thereof. The compound film includes three layers film structure, wherein, the medium layer is the polyethylene film for screen electromagnetic wave, the outer layer are respectively retardant polyethylene film and pure polyethylene film. A metal coating with an average thickness of 1-20 mum is coated on the outer surface of the film. The film comprises 10-100 portion by weight of electromagnetic wave screening additive, 20-35 portion by weight of halogen-free flame retardant, 5-10 portion by weight of anti-dripping agent, which has the polyethylene resin as 100 portion. There are two kinds of screening additive, one is a mixture of metal fiber and metal conductive powder; the other is a mixture of metal fiber and carbon fiber. The halogen-free flame retardant is ammonium polyphosphate pentaerythritol. The anti-dripping agent is silicate mine. The inventive polyethylene compound film has a good electromagnetic wave screening effect and retardant effect.

Description

technical field [0001] The invention relates to a polyethylene resin film, and more particularly relates to a polyethylene film capable of shielding broadband electromagnetic waves, flame retardant and antistatic and a preparation method thereof. Background technique: [0002] In a society with rapid development of electronics, electrical, communication and information industries, electromagnetic wave interference, electromagnetic wave information leakage and electromagnetic wave environmental pollution have become increasingly serious social problems. Electromagnetic wave is a transmission process of electromagnetic energy, which is a transverse wave, and its propagation form is similar to that of light. According to Schelkunoff's electromagnetic shielding theory, the shielding attenuation of electromagnetic wave energy has three forms: reflection loss, absorption loss and internal reflection loss. In general, it is mainly affected by reflection loss and absorption loss. E...

Claims

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Application Information

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IPC IPC(8): H05K9/00H05F3/00B32B33/00
Inventor 臧充光焦清介刘帅解娜高宏梁礼孩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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