| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bulk including polyester polymer spheroid which has a particular physical form and does not require solid phase polymerization. <P>SOLUTION: The bulk includes polyester polymer spheroid which has (A) an It.V. of at least 0.72 dL/g, and either or both of (B) at least two melting peaks (wherein one of them is a low peak melting point having a peak temperature within a range of 140-220°C and having a melting endotherm area of at least the absolute value of 1 J/g) and (C) a low crystallinity within a range of at least 20% and a maximum crystallinity T<SB POS="POST">cmax</SB>defined by equation T<SB POS="POST">cmax</SB>=50%-CA-OH (wherein CA is the total mol% of all carboxylic acid residues other than terephthalic acid residues based on 100 mol% of carboxylic acid residues in a polyester polymer, and OH is the total mol% of hydroxyl functional compound residues other than ethylene glycol residues based on 100 mol% of the hydroxyl functional compounds residues). <P>COPYRIGHT: (C)2012,JPO&INPIT |
