Electromagnetic shielding film and preparation method thereof

Abstract

The invention discloses an electromagnetic shielding film and a preparation method thereof. The electromagnetic shielding film has five layers, successively being: a PET insulating layer, a metal layer, an adhesive layer, an electromagnetic shielding layer, and a pressure-sensitive adhesive layer; wherein the electromagnetic shielding layer is formed by mixing the following components in parts byweight: 25-35 parts of polypropylene, 8-16 parts of graphene, 25-35 parts of carbon black, 18-25 parts of aluminum powder, 8-12 parts of a compatilizer and 5-10 parts of carbonyl iron powder. The electromagnetic shielding film provided by the invention is simple in preparation mode, relatively low in cost, good in performance and simple to strip off and paste.

Description

technical field [0001] The invention relates to the field of film technology, in particular to an electromagnetic shielding film and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, an invisible and intangible pollution source has attracted increasing attention from all walks of life, which is electromagnetic radiation, which is called "invisible killer". Today, the use of more and more electronic and electrical equipment makes electromagnetic waves of different frequencies and energies flood every corner of the earth and even the wider universe. For the human body, a good conductor, electromagnetic waves will inevitably pose a certain degree of harm. [0003] The mechanism of electromagnetic radiation harming the human body. The mechanism of electromagnetic radiation harming the human body is mainly thermal effect, non-thermal effect and cumulative effect. [0004] 1. Thermal effect: more than 70% ...

AI Technical Summary

Problems solved by technology

[0008] First, the rapid development of wireless communication, but the lack of reasonable planning and layout of the construction of transmitting stations and stations caused aviation communication to be interfered. The radiation caused serious interference to the radio communication system of the airport control tower, which disabled the ground-to-air command, and the airport was forced to close for two hours

[0009] The second is that the high-frequency industrial equipment used by some enterprises interferes with radio and television signals, making surrounding residents unable to watch TV normally and causing serious mass disputes. For example, the Beijing Dongcheng District Stationery Factory once interfered with the high-frequency heat sealing machine of the factory. The TV station's sports game was broadcast, and the glass of the factory was smashed by the angry crowd

[0010] The third is that some broadcasting stations originally located in the suburbs of the city were later surrounded by the urban area with the development of the city, and the surrounding environment has changed from sparsely populated to densely populated. The electromagnetic radiation emitted by the station interfered with the local people watching TV.

[0013] 2. Electromagnetic radiation causes direct damage to the human reproductive system, nervous system and immune system

[0016] 4. Excessive electromagnetic radiation directly affects children's tissue development, bone development, and vision loss; liver hematopoietic function declines, which can lead to retinal detachment in severe cases

[0022] 2. It can induce cancer and accelerate the proliferation of cancer cells in the human body. Electromagnetic radiation pollution will affect the circulatory system, immunity, reproduction and metabolism of the human body. In severe cases, it can also induce cancer and accelerate the proliferation of cancer cells in the human body.

If a patient with a pacemaker is placed in an environment with high electromagnetic radiation, it will affect the normal use of the pacemaker

[0026] 6. It has adverse effects on people's visual system. Since the eyes are sensitive organs of the human body to electromagnetic radiation, excessive electromagnetic radiation pollution will also affect the visual system.

[0033] With the development of human civilization, electromagnetic radiation is becoming more and more serious, and people's desire to minimize electromagnetic radiation damage is becoming stronger and stronger. However, most electromagnetic shielding products on the market are expensive and inconvenient to use. There is an urgent need for a An electromagnetic shielding film that can be used in a wide range of scenarios, is affordable, and is easy to use