| 摘要 |
THE POLYTRIMETHYLENE TEREPHTHALATE HOLLOW COMPOSITE STAPLE FIBERS (1) EXHIBITING A LATENT CRIMPING PROPERTY AND HIGH BULKINESS AND ELASTIC RECOVERY AND USEFUL FOR NONWOVEN, WOVEN AND KNITTED FABRICS AND CUSHIONING MATERIALS, HAVE A HOLLOW SIDE-BY-SIDE OR CORE-IN-SHEATH TYPE STRUCTURE FORMED FROM TWO POLYTRIMETHYLENE TEREPHTHALATE RESIN COMPONENTS (2, 3) ONE OF WHICH HAS AN INTRINSIC VISCOSITY OF 0.50 TO 1.40 DL/G AND OTHER ONE OF WHICH HAS AN INTRINSIC VISCOSITY OF 0.40 TO 1.30 DL/G AND 0.1 TO 0.5 DL/G BELOW THAT OF THE FORMER, AND HAVING A HOLLOW PART (4) WITH A CROSS-SECTIONAL AREA OF 2 TO 15% OF THE TOTAL CROSS-SECTIONAL AREA, AND EXHIBIT, AFTER THE HOLLOW COMPOSITE STAPLE FIBERS (1) ARE FORMED INTO A WEB HAVING A BASIS WEIGHT OF 30 G/M2, AND THE WEB IS HEATED AT 120°C FOR 10 MINUTES TO CAUSE THE WEB TO FREELY SHRINK, AN AREA THERMAL SHRINKAGE OF 30 TO 70% BASED ON THE ORIGINAL AREA OF NON-HEATED WEB. |
