Device for tension processing polyamide fiber in supercritical CO2

The utility model relates to a device for tension processing a polyamide fiber in supercritical CO2. A device body is a high-pressure kettle provided with a lining and a kettle cover provided with an air inlet (2) and an air outlet (7). A body of the high-pressure kettle is soaked in an oil bath (4) in a surrounded mode. A fiber clamp (1) is installed in the high-pressure kettle. The fiber clamp (1) is composed of a spring and two parallel smooth pillars. According to the device for tension processing the polyamide fiber in the supercritical CO2, the fiber can be tensioned and modified in a supercritical CO2 atmosphere. As the fibers are in a tension state in reaction all the time, the orientation degree and the crystallinity degree of fiber molecule chains are enlarged, crystal grains are enlarged, crystallization tends to be complete, and meanwhile, orientation of a polar non-formed zone is improved, the fiber strength and the modulus are improved and the device for tension processing the polyamide fiber in