| 主权项 |
1. A method for making an article of manufacture comprising:
thermoforming a film into a shape having first and second edges, placing said first and second edges in an overlapping position and, sealing said first and second edges together by subjecting the overlapping edges to an RF-sealing energy, said film comprising a reactor grade copolyester comprising:
(A) an acid residue moiety comprising:
(1) greater than about 70 mole % terephthalic acid; and(2) from about 0 to 30 mole % of a modifying acid selected from the group consisting of isophthalic acid, adipic acid, azelaic acid, succinic acid, naphthalenedicarboxylic acid, cyclohexanedicarboxylic acid, and mixtures thereof, and(B) a diol residue moiety comprising,
(1) from about 88 to about 94 mole % ethylene glycol; and(2) from about 6 to about 12 mole % of a modifying diol selected from the group consisting of 1,4-cyclohexanedimethanol, diethylene glycol, neopentyl glycol, 2,2,4,4-tetramethylcyclobutane-1,3-diol, isosorbide and mixtures thereof, wherein the copolyester has a crystallinity defined by a minimum crystallization half time (t1/2 min) of from at least 1.5 to 30 minutes and wherein the sum of the mole percentages of component (A) are based on 100 mole percent of the acid residue moiety and the sum of the mole percentages of component (B) are based on 100 mole percent of the diol residue moiety. |
