A polystyrene (PS) spoon was locally heated using a halogen line heater, and its thermal deformation behavior was observed.
Polystyrene is a thermoplastic widely used in food containers and disposable cutlery. During non-contact infrared heating, the irradiated area rapidly increases in temperature, resulting in softening and deformation.
The stiffness of polystyrene decreases near its glass transition temperature, leading to thermal deformation. This video demonstrates the deformation behavior caused by temperature rise during localized infrared heating.
Line-focused infrared heating is utilized in various industrial applications, including preheating before plastic molding, thermal processing, thermal deformation evaluation, and heating tests for recycling processes.
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