特論講座
不均質高分子系を対象とする材料技術
第3回 架橋高分子をマテリアルリサイクルする
キーワード:
Closed-loop Recycling,
Automotive Waste,
Crosslinked Polymer,
Reactive Processing,
Twin-screw Extruder
2023 年 96 巻 7 号 p. 192-198
詳細
2023 年 96 巻 7 号 p. 192-198
Material recycling technologies, contributing to promoting closed-loop recycling processes, are shown in this Part III for automotive polymer wastes mixed with crosslinked polymers as non-recyclable materials. High quality material recycling technologies based on continuous processes using twin-screw extruders under the controls of temperature, shear stress, internal pressure and chemical reactions in treating processes with selective breakages of crosslinking points and melt-blending of immiscible materials were developed in the late1990s and early 2000s for painted thermoplastic bumper waste, two layered surface material waste from interior trims and sulfur-crosslinked rubber waste from weather strips. Basic concepts for high closed-loop material recycling as shown in this lecture will provide some useful hints to use recycled materials for the same production or other high-value production cycles.
