Preparation process of wireless charging application shielding sheet and shielding sheet

Abstract

The invention discloses a preparation process of a wireless charging application shielding sheet. The wireless charging application shielding sheet comprises at least one longitudinally superposed shielding layer, wherein each shielding layer is formed by transversely splicing at least one soft magnetic shielding unit. The preparation process comprises the following steps: selecting soft magneticmaterials, and performing winding and heat treatment on the soft magnetic materials sequentially to obtain a substrate with two exposed surfaces; coating one exposed surface of the substrate with a double-sided adhesive tape, and cutting and vibrating the other exposed surface of the substrate by combining energy wire cutting and acoustic wave vibration to decompose the substrate into a pluralityof thin sheets in uniform shapes and certain size and obtain a soft magnetic shielding unit. The invention further discloses the wireless charging application shielding sheet. The wireless charging application shielding sheet comprises at least one shielding layer, a colloidal protective film and a PET film. The preparation process is simple and feasible, the shielding sheet is thin, good in shielding capability, high in charging efficiency and stable in work, and the process cost and the material cost are greatly saved.

Description

technical field [0001] The invention relates to the technical field of wireless charging and electromagnetic shielding, and more specifically, the invention relates to a preparation process of a shielding sheet for wireless charging applications. The invention also relates to a shielding sheet for wireless charging applications. Background technique [0002] With the rapid development of science and technology, people's work and life are increasingly dependent on electronic equipment. Walking on the street, almost everyone is looking at their mobile phones or using other electronic devices. Many people feel that the battery power is not enough and they are unwilling to carry a bulky power bank. If there is a mobile phone signal, it can be charged anytime, anywhere. How good it would be, not to mention the need for cumbersome data cable charging. Although it has not yet been realized to charge freely anytime and anywhere on the street, a new wireless charging technology has...

AI Technical Summary

Problems solved by technology

The above process is complicated and the process is long, and the adhesive layer strip is passed through a strong acid and alkali solution and an etching solution. Generally, the coil substrate of the etching method is a PI substrate that is resistant to high temperature and strong acid and alkali solutions, but the performance of the adhesive layer changes and the gaps are not easy to dry. The strip is easy to oxidize

The cost is high, and they are all treated with chemicals and heated, which seriously pollutes the environment and is not conducive to environmental protection. It is contrary to the government's advocacy of green environmental protection.

Poor performance consistency and low charging efficiency

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