Polysulphonamide fiber cable type spinning method

Abstract

The invention belongs to spinning technologies and relates to a polysulphonamide fiber cable type spinning method. Polysulphonamide fiber has high volume specific resistance, high initial modulus, low friction factor and low crimp stability, thereby being unfavorable to spinning, weaving, dyeing and the like of the fiber, and the adoption of the traditional spinning technology has the disadvantages of difficult yarn formation, high yarn hairiness and influence on yarn quality. The polysulphonamide fiber cable type spinning method comprises the following steps: using a separating roller for separating a strand into more than two shares of fiber bundles when being discharged from a front jaw of a spinning frame; leading the fiber bundles after separation to enter into a separating slot under the action of spinning tension; leading the fiber bundles in the separating slot to rotate around the twisting center under the action of spinning twisting force; and leading the fiber bundles with a certain twist to move downwards along with the winding of a yarn, and leading all the fiber bundles to converge at one point and carry out the rotary motion around the twisting center of the whole yarn, thereby forming a cable type spun yarn. The polysulphonamide fiber cable type spinning method has the advantages that the polysulphonamide fiber cable type spun single yarn has low hairiness and high single yarn strength; and the elongation at break of the single yarn is small.

Description

technical field [0001] The invention belongs to the spinning technology, in particular to a cable-type spinning method of sulfonamide fibers. Background technique [0002] Polysulfonamide (PSA) fiber is polyterephthaloyl-3,3',4,4'-diaminodiphenylsulfone copolymer fiber, also known as polyarylsulfonamide fiber. TANLON), the molecular structure is an amide group (one CONH one), a sulfone group (one SO: one), and a benzene ring bonded together, and the molecular structure formula is: [0003] [0004] There are both para and meta structures in the macromolecular chain structure, the molecular skeleton structure is stable and regular, and the fiber has a high degree of crystallinity and orientation. The X-ray small-angle diffraction test shows that it has a good degree of orientation and a crystallinity of 14% to 18%. The molecular characteristics of sulfonamide fiber make it have excellent chemical stability, thermal stability, high modulus and low electrical conductivity....

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