What is the production process of heat shrink tubing?

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The process of producing heat-shrinkable tubing consists of three steps: extrusion, electron beam irradiation, and expansion.

For example, polyethylene is extruded into a tubular shape using an extruder and then cross-linked by a high-energy electron beam accelerator. Next, the cross-linked tube is softened in the heating zone and expanded radially by internal pressure or other means, and then cooled to fix the expanded shape as the final heat-shrinkable tube product.

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