| 摘要 |
Disclosed herein is a solid-state extrusion-orientation process. The process produces a polymer-oriented profile by compressing a billet through an extrusion die, in which the billet comprises crystalline or semi-crystalline polymers or a composite containing the polymers and an organic or inorganic filler. The process comprises the steps of preheating a pressure chamber to a temperature of a polymer's melting point or less, applying ultrasound to the extrusion die positioned next to the pressure chamber and having a smaller cross-sectional area that the pressure chamber, and extruding the billet through the pressure chamber and the extrusion die to produce the polymer-oriented profile. This process eliminates the step of heating the extrusion die, thereby ensuring convenient and rapid operation while providing a polymer profile having a smooth surface without any defects.
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