New thermoplastic elastomer (TPE)s with different polymer content and additive were injection-molded onto line-and-space micro pattern and sand-blasted aluminum plates. The thermal shrinkage and micro surface replication of molded elastomers were revealed after injection molding. These properties of elastomers were dependent on the composition of polymer and additive. Moreover, the sand-blasted aluminum substrate was joined with the molten elastomer as the elastomers were developed to precise seal parts for electronic devices. The joining strength of the aluminum/elastomer interface was sufficiently strong as the elastomers themselves were fractured while the interface was held when the joined part was stretched.
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