| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester fiber sheet with shape-setting properties having good shape-setting properties together with elastic feeling and excellent flexibility and thickness feeling. SOLUTION: This polyester fiber sheet contains a polyester fiber having the following characteristics expressed by items (1)-(4): (1) having <=25% degree of crystallization in DSC measurement, (2) having >=60% elongation at break in a load-elongation curve measured in tensile strength and elongation, (3) having <=2,000 N/mm2 apparent Young's modulus and (4) having <=40% shrinkage percentage in boiling water.
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