Spindle models exhibiting improved performance with resins pet low melting point

摘要

A method for melt processing a polyester comprising: a. introducing polyester particles into a melt processing device state; b. melting the polyester particles in the melt processing device to produce molten state unpoliéster; c. forming an article from the polyester fundidoen wherein the polyester particles comprise: (i) a carboxylic acid component comprising at least 80 mole percent terephthalic acid s odium waste, derivatives of terephthalic acid, or mixtures thereof, and (ii) a hydroxyl component comprising at least 80 mole percent of residues of ethylene glycol, based on 100 mole percent of the residues of carboxylic acid component and 100 percent enmoles of hydroxyl component residues in the polyester particles and the polyester particles ademásse characterized by one or more of the following conditions: 1. have at least two melting peaks, wherein one of the at least two melting peaks is a peak puntode low melting a range between 140 ° C and 220 ° C and having an area of ​​defusion endotherm at least the absolute value of 1 J / g; 2. have one or more melting peaks at least one of which, when measured by a primeraexploración DSC heating, has a heating curve which is separated with respect to unalínea base in the endothermic direction at a temperature less than or equal to 200 ° C; 3. having an It.V. on its surface that is less than 0.25 dl / g higher than the It.V. in its center; o4. have not been solid stated; wherein the device comprises melt processing a screw with a total length, L, unalongitud the feeding zone in the range of between 0.16 L and 0.45 L, one taper angle, Φ, in the range of between 0.5 degrees and 5.0 degrees, and a compression ratio, CR, in the range between 2.0 and elintervalo 5.0.