Method for manufacturing foamed adhesive sheets and structures

JP2026090626APending Publication Date: 2026-06-02DAI NIPPON PRINTING CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
DAI NIPPON PRINTING CO LTD
Filing Date
2026-03-06
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing foaming adhesive sheets face challenges in balancing foaming and curing processes, leading to issues with foaming ratio and adhesive strength, making it difficult to achieve desired foaming and adhesive properties suitable for specific gaps between members.

Method used

A foamed adhesive sheet with an adhesive layer containing a thermosetting adhesive and a foaming agent, where the displacement and initial thickness are controlled during thermomechanical measurement to ensure a specific range relative to the gap setting value, optimizing foaming and adhesive properties.

Benefits of technology

The solution enables the production of a foamed adhesive sheet with excellent foaming and adhesive properties suitable for predetermined gaps, ensuring high adhesive strength and effective gap filling.

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Abstract

The present invention provides a foamable adhesive sheet and a method for manufacturing a structure using the foamable adhesive sheet, which can obtain excellent foaming and adhesive properties suitable for a predetermined gap. [Solution] A foamed adhesive sheet having an adhesive layer, wherein the adhesive layer contains a thermosetting adhesive and a foaming agent, and the foamed adhesive sheet is provided wherein, when a compressive load is applied to the foamed adhesive sheet by thermomechanical measurement, the temperature is raised at a predetermined heating rate, and the displacement is measured, the sum of the initial thickness of the foamed adhesive sheet and the amount of displacement at a predetermined temperature of 160°C or more and less than 200°C is 100% or more and 308% or less relative to a gap setting value of 100%.
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