PAN基炭纤维连续炭化牵伸的初步探讨

A PRELIMINARY APPROACH TO STRETCHING THE FLBERS DURING THE CONTINUOUS CARBONIZATION FOR PAN-BASED CARBON FIBERS

本文在PAN基炭纤维连续炭化过程中,探讨了纤维在高,低温炭化炉内的长度变化以及牵伸对最终炭纤维抗张强度的影响。结果表明,当高,低温炭化炉连在一起时,随着低温炭化炉温度的降低,纤维在低温炉内伸长,在高温炉内收缩。当高。低温炭化炉被导轮分开后。可对低温炭化炉内的纤维实施进一步的牵伸。随着这种牵伸率的增大,炭纤维的抗张强度提高,线密度下降。

In this paper, the length changes of the fiberes inside both high and low temperature furnaces and the effect of draw ratio on the properties of resulting carbon fibers have been approached during continuous carbonization. The resutts showed that, when the two furnaces were linked together, the fiber length increased in the low temperature furnace and decreased in the high temperature furnace with the decrease of temperature inside the low temperature furnace. After the two furnaces were separated by delivery godets, the fiber in the low temperature furnace could be further elongated. As the elongation ratio was increased, the tensile strength of carbon fibers increased, and the linear density decreased.