| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyester composition causing little increase of filter back-pressure in molding, generating little foreign materials and having excellent transparency, thermal stability and flavor retention, or excellent transparency, thermal stability, flavor retention and gas barrierness and provide a polyester material for wrapping produced by using the composition. <P>SOLUTION: The polyester composition is composed of 100 pts.wt. of a thermoplastic polyester and 0.01-30 pts.wt. of a partially aromatic polyamide provided that the total residual phosphorus atom content (PC) in the partially aromatic polyamide is≥10 ppm and a phosphorus atom content (P4) is≤200 ppm (P4 is the content of phosphorus atom derived from a phosphorus compound detected as a pyrophosphoric acid having a specific structural formula determined by a structure analysis after dissolving the partially aromatic polyamide in a<SP>31</SP>P-NMR measurement solvent and adding trifluoroacetic acid to the solution). <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
