High frequency (HF) welding of linear low density polyethylene (LLDPE) melt blends with polyamide 6 (PA6) was done at 27.12 MHz using maleic anhydride grafted polyethylene (PE-g-MAH) as compatibilizer. HF welding was not possible for the blends at room temperature, but possible at higher temperatures (50, 808C) although the maximum relaxation frequency was lower than the operating frequency. Greater dielectric constant, dissipation factor, and welding performance were obtained when PA 6 was premixed with PE-g-MAH rather than the one-shot process where all the components were mixed simultaneously. This was interpreted in terms of lowered viscosity of PA 6 phase, which encapsulates the flow effectively and provides great skin effect. Also, the peeling force of resin-resin was greater than resin-nylon mesh due to the higher melting temperature and vacancy of nylon mesh.
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