Investigating the wet stretch spinning of co-ployimide fiber

• Main Authors: Lin Pin Hao, 林品豪
• Other Authors: 蘇淵源
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/pwxy26

碩士 === 國立臺北科技大學 === 化學工程研究所 === 104 === A study of spinnability is presented for the formation of co-Polyimide (P84) fiber to achieve non-woven’s fiber by wet stretch spinning method. The wet spinning is commonly used in the production of non-woven, but if it is combined with the process of coagulation and stretching, it will improve the efficiency of spinning. The term spinnability is dependent on the stretching by the coagulation bath of rotating flow field. The production of long fiber is made from continuous wet spinning by gravitational force. However, we try to add the solvent into the coagulation bath to improve the degree of stretching. No matter what, the way to stretch, the degree of stretching is dependent on the dope’s flow rate and concentration. In addition, adding the solvent in the coagulation bath does not directly influence or affect the degree of stretching but rather decreases the amount of holes in each fiber’s cross-sectional area. The wet-spinning process of co-Polyimide(P84) curing speed is too fast; as a result it is extremely difficult to stretch it in time. The curing speed is directly related to the rate of mass transfer and the phase transition. That is the preliminary conclusion. The dope’s flow rate and concentration are the key point of stretching. The future of the production of non-woven filaments by this wet stretch spinning must be increasing the number of spinning holes to accord with the demands of the market.