Two stage drawn and relaxed staple fiber
Abstract
Abstract A PROCESS FOR DRAWING POLYESTER FILAMENTS THAT INCLUDES THE STEPS OF DRAWING THE FILAMENTS IN A FIRST ZONE AT A TEMPERATURE BETWEEN 10* C. AND 50* C. FOLLOWED BY FURTHER DRAWING THE FILAMENTS IN A SECOND ZONE AT A TEMPERATURE ABOVE 70* C. BUT BELOW THE MELTING POINT OF THE POLYESTER. WHEN THE POLYESTER IS POLYETHYLENE TEREPHTHALATE, IT IS PREFERRED THAT THE FILAMENTS BY DRAWN AT LEAST ABOUT 2.6 TIMES THEIR ORIGINAL LENGTH AT A TEMPERATURE BETWEEN 25*C AND 45* C. IN THE DRAW ZONE AND THEN FURTHER DRAWN IN THE SECOND DRAW ZONE AT A TEMPERATURE FROM ABOUT 70* C. TO ABOVE 150*C. TO PROVIDE A TOTAL DRAW RATIO OF AT LEAST ABOUT 2.8:1. THE FIBERS PRODUCED HAVE A TENACITY AT 7 PERCENT ELONGATION OF LESS THAN 2.0 GRAMS PER DENIER, A LOW SHRINKING FORCE AND WHEN BLENDED WITH COTTON PROVIDE A BLEND YARN HAVING A HIGH LEA PRODUCT.
Inventors
- 👤 O Vail
Bibliographic Details
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