Process for producing polyester fibers and having high and constant shrinkage
Abstract
Abstract POLYESTER FIBERS OR FILAMENTS WHICH EXHIBIT A HIGH AND CONSTANT SHRINKAGE AT VARYING HEAT-TREATMENT TEMPERATURES FOR DEVELOPING OF SHRINKAGE ARE OBTAINED BY DRAWING UNDRAWN FIBERS OR FILAMENTS TO AT LEAST 3 TIMES THEIR ORIGINAL LENGTH AT A TEMPERATURE OF 40 TO 70*C., SHRINKING THE DRAWN FIBERS OR FILAMENTS AT A TEMPERATURE OF 65-130* C. BY 10-50% OF THE DRAWN LENGTH, AND THEREAFTER, DRAWING THE FIBERS OR FILAMENTS BY 10-80% OF THE SHRUNKEN LENGTH AT A TEMPERATURE OF 40-70*C. AND TO AN EXTENT NOT IN EXCESS OF 1.2 TIMES THE ABOVE-MENTIONED DRAWN LENGTH. SPUN YARNS AND TEXTILE FABRICS CONTAINING THE SO OBTAINED FIBERS OR FILAMENTS HAVE A HIGH AND UNIFORM SHRINKAGE AT VARYING HEAT-TREATMENT TEMPERATURES.
Inventors
- 👤 Takeshi Konishi
- 👤 Keizo Ueda
Bibliographic Details
Claims Analysis
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