Development of ultrasonic polymer/metal bonding technology based on basic knowledge of polymer bonding

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04673
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26030:Composite materials and interfaces-related
• Research Institution: Yamagata University
• Principal Investigator: MIYATA KEN 山形大学, 大学院有機材料システム研究科, 准教授 (60333994)
• Co-Investigator(Kenkyū-buntansha): 西辻 祥太郎 山形大学, 大学院有機材料システム研究科, 准教授 (00564858)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 高分子 / 金属 / 超音波接合 / 接合技術 / 界面 / サーモグラフィ

Outline of Final Research Achievements

Based on the basic knowledge of adhesive-free joining of polymers, we have developed a polymer/metal joining technology. The mechanism of metal/polymer bonding is not well understood. The purpose of this study is to realize intermolecular joining of polymer materials and metal/polymer joining, which are considered to be difficult, based on the basic knowledge of polymer joining, and to elucidate the joining mechanism. In ultrasonic welding tests between polymers and aluminum, polylactic acid showed the highest bonding strength. This is due to its moderately high elastic modulus and low melt viscosity. It is considered that properties such as elastic modulus and melt viscosity are related to bonding properties.

Free Research Field

高分子包装要素技術

Academic Significance and Societal Importance of the Research Achievements

本研究は、高分子の接合に関する基礎知見を基盤に接合困難とされる高分子材料の相互接合や金属/高分子の接合を実現することである。さらに接合のメカニズムを明らかにすることである。本研究の成果は、実用的にも同種・異種のプラスチック部材相互接合の可能性を大きく展開できる。また、高分子/各種繊維強化複合材料においても界面接着性を向上させることなどへの応用展開も可能となり、直接的にも工業的応用が期待できるものである。