Abstract
Polypropylene has some merits such as lightweight, anti-chemistry, and good recyclability. However, it is problem that PP is unsuitable for adhesion. This because of the low surface energy PP has. Therefore, we introduce new adhesion method using undercut structure. Undercut structure is can be mechanically restrained because of its structural property. In this study, we transfer undercut structure to PP surface for the purpose of improving adhesion strength. To transfer the undercut structure, a roll imprint machine was built, and transferring was executed. PP which has undercut was tested to measure its tensile strength. The results showed much higher tensile strength in undercut than plane.
