Preparation method of polyvinyl butyral laminated film with heat-conducting property and electromagnetic shielding property

By blending PVB with thermally conductive filler and laminated and pressing the laminated film, the problem of taking into account both thermal and electromagnetic shielding performance in electronic equipment is solved, and efficient heat dissipation and electromagnetic shielding are achieved, while maintaining the flexibility of the material, suitable for large-scale production and environmental protection requirements.

CN119820969AInactive Publication Date: 2025-04-15BEIJING TECH & BUSINESS UNIV
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Patent Information

Application Number
CN202510104040.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-23
Publication Date
2025-04-15
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The prior art is difficult to take into account both thermal conductivity and electromagnetic shielding properties in electronic devices, especially in flexible electronic devices applications. Traditional materials such as metal heat sinks and metal foils have problems such as large weight, complex processing and poor compatibility.

Method used

By blending, extruding, casting polyvinyl butyral (PVB) with thermally conductive filler and laminated, a laminated film with a multi-layer structure is prepared to improve its thermal conductivity and electromagnetic shielding effect while maintaining the flexibility of the material.

Benefits of technology

It achieves better thermal conductivity and electromagnetic shielding effect, while maintaining the flexibility of the material. It is suitable for solving heat dissipation and electromagnetic interference problems in modern electronic equipment, and the process can be produced on a large scale, environmentally friendly and sustainable.

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Abstract

The invention relates to the technical field of heat-conducting and shielding bifunctional films, and discloses a preparation method of a polyvinyl butyral laminated film with heat-conducting property and electromagnetic shielding property, and the polyvinyl butyral laminated film comprises a PVB substrate, a heat-conducting and electric-conducting filler, an antioxidant and a plasticizer. According to the preparation method of the polyvinyl butyral laminated film with the heat-conducting property and the electromagnetic shielding property, the pollution problem caused by preparation by a traditional solution method is reduced, and the innovation of the invention is that the processing mode of the polyvinyl butyral laminated film is that laminated compression molding is performed after hot processing, so that large-scale production can be realized; meanwhile, due to the multi-layer laminated structure, the material is endowed with excellent heat conduction and shielding performance, and the mechanical property of the PVB material is maintained, so that the film can adapt to various electronic elements with complicated shapes while ensuring the heat dissipation and electromagnetic wave shielding of electronic equipment, thereby providing greater flexibility in design, and in addition, the film has a good application prospect. The production process of the film is environment-friendly, and meets the requirements of the current electronic industry on sustainable development.
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Citation Information

Patent Citations

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    CN108047569A

  • High-thermal-conductivity electromagnetic shielding composite material and preparation method thereof

    CN111070833A

  • Heat-conducting electromagnetic shielding material with orientation structure and preparation method thereof

    CN111267434A

  • High-thermal-conductivity electromagnetic wave absorption composite thin sheet and preparation method thereof

    CN111589675A

  • Magnetic shielding composite material with orientation structure and preparation method and application thereof

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