Large-tow polyimide fiber dry spinning channel

• Main Authors: HONG LIANG, CHEN BIN, LU FEI, GUO TAO, ZHU GUIPENG, TANG XINGLONG, WANG SHIHUA, WANG JIANGANG
• Format: Patent
• Language: Chinese; English
• Published: 03.02.2023
• Subjects: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

The utility model provides a large-tow polyimide fiber dry spinning channel. The spinning channel comprises a channel body, an air inlet pipe, two first pore plates, two second pore plates and two annular spinneret plates, the channel body is divided into an upper channel, a middle channel and a lower channel from top to bottom, the upper channel, the middle channel and the lower channel are communicated in sequence, the top end of the upper channel and the bottom end of the lower channel are both closed, a yarn outlet is formed in the bottom end of the lower channel, and the air inlet pipe is connected with the air inlet pipe. A polyimide solution is sprayed out from the annular spinneret plate located at the top end of the upper channel to form a stock solution trickle, hot air of the air inlet pipe is evenly blown to the stock solution trickle through the first pore plate, and corresponding temperatures of the heating and heat preservation layers of the upper channel, the middle channel and the lower chann