捻系数和混纺比与玉米纤维纱强伸性能的关系

为了了解玉米纤维纯纺纱捻系数、玉米纤维混纺纱混纺比对成纱强伸性能的影响，纺制了13种捻系数的18．2tex玉米纤维纯纺纱，不同混纺比例的18．2tex玉米纤维腈纶纤维混纺纱、玉米纤维大豆纤维混纺纱，测试了成纱断裂强力、断裂伸长率、断裂功及初始模量等强伸性能指标。结果表明：玉米纤维纯纺纱的临界捻系数在405．9附近；在玉米纤维腈纶纤维混纺纱中，随着玉米纤维含量从0增至100％，成纱强力呈非线性关系逐渐下降；对于玉米纤维大豆纤维混纺纱，随着玉米纤维含量的增加，成纱强力逐渐下降，当玉米纤维含量在90％左右时，强力处于最低谷，且低于玉米纤维纯纺纱。

Relation of Twist Factor & Blending Ratio and Strength & Elongation of Corn Protein Fiber

To study the influence of twist factor of corn protein fiber pure yarn and blending ratio of corn protein fiber on yarn strength and elongation, 13 kinds of 18.2 tex corn protein pure yarn with different twist factors, 18.2 tex corn protein fiber acrylic fiber blended yarn with different blending ratio and corn protein fiber soybean protein fiber blended yarn were spun, property indexes of breaking strength, breaking elongation, work of break, initial modulus and so on were tested. The result shows that critical twist factor of corn protein fiber pure yarn is about 405.9, yarn strength of corn protein acrylic fiber blended yarn is reduced by nonlinear relation with the increase of corn protein fiber content, which is increased from 0 to 100%. Yarn strength of corn protein fiber soybean protein fiber blended yarn is reduced gradually with the increase of corn protein fiber content, when the content of corn protein fiber at about 90%, the strength is almost the lowest, and it is lower than that of corn protein fiber pure yarn.